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linux/sound/core/pcm_lib.c

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* Digital Audio (PCM) abstract layer
[ALSA] Changed Jaroslav Kysela's e-mail from perex@suse.cz to perex@perex.cz Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2007-10-15 15:50:19 +08:00
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
* Abramo Bagnara <abramo@alsa-project.org>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/slab.h>
sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> Fix up affected files that include this signal functionality via sched.h. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-02-03 02:15:33 +08:00
#include <linux/sched/signal.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#include <linux/time.h>
ALSA: Clean up 64bit division functions Replace the house-made div64_32() with the standard div_u64*() functions. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-06-05 23:40:04 +08:00
#include <linux/math64.h>
sound: Add export.h for THIS_MODULE/EXPORT_SYMBOL where needed These aren't modules, but they do make use of these macros, so they will need export.h to get that definition. Previously, they got it via the implicit module.h inclusion. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-09-22 21:34:58 +08:00
#include <linux/export.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#include <sound/core.h>
#include <sound/control.h>
ALSA: PCM: channel mapping API implementation This patch implements the basic data types for the standard channel mapping API handling. - The definitions of the channel positions and the new TLV types are added in sound/asound.h and sound/tlv.h, so that they can be referred from user-space. - Introduced a new helper function snd_pcm_add_chmap_ctls() to create control elements representing the channel maps for each PCM (sub)stream. - Some standard pre-defined channel maps are provided for convenience. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-07-28 00:27:00 +08:00
#include <sound/tlv.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#include <sound/info.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/timer.h>
ALSA: pcm: add local header file for snd-pcm module Several files are used to construct PCM core module, a.k.a snd-pcm. Although available APIs are described in 'include/sound/pcm.h', some of them are not exported as symbols in kernel space. Such APIs are just for module local usage. This commit adds module local header file and move some function prototypes into it so that scopes of them are controlled properly and developers get no confusion from unavailable symbols. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-26 08:30:46 +08:00
#include "pcm_local.h"
ALSA: pcm: Replace PCM hwptr tracking with tracepoints ALSA PCM core has a mechanism tracking the PCM hwptr updates for analyzing XRUNs. But its log is limited (up to 10) and its log output is a kernel message, which is hard to handle. In this patch, the hwptr logging is moved to the tracing infrastructure instead of its own. Not only the hwptr updates but also XRUN and hwptr errors are recorded on the trace log, so that user can see such events at the exact timing. The new "snd_pcm" entry will appear in the tracing events: # ls -F /sys/kernel/debug/tracing/events/snd_pcm enable filter hw_ptr_error/ hwptr/ xrun/ The hwptr is for the regular hwptr update events. An event trace looks like: aplay-26187 [004] d..3 4012.834761: hwptr: pcmC0D0p/sub0: POS: pos=488, old=0, base=0, period=1024, buf=16384 "POS" shows the hwptr update by the explicit position update call and "IRQ" means the hwptr update by the interrupt, i.e. snd_pcm_period_elapsed() call. The "pos" is the passed ring-buffer offset by the caller, "old" is the previous hwptr, "base" is the hwptr base position, "period" and "buf" are period- and buffer-size of the target PCM substream. (Note that the hwptr position displayed here isn't the ring-buffer offset. It increments up to the PCM position boundary.) The XRUN event appears similarly, but without "pos" field. The hwptr error events appear with the PCM identifier and its reason string, such as "Lost interrupt?". The XRUN and hwptr error reports on kernel message are still left, can be turned on/off via xrun_debug proc like before. But the bit 3, 4, 5 and 6 bits of xrun_debug proc are dropped by this patch. Also, along with the change, the message strings have been reformatted to be a bit more consistent. Last but not least, the hwptr reporting is enabled only when CONFIG_SND_PCM_XRUN_DEBUG is set. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-11-04 19:45:59 +08:00
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
#define CREATE_TRACE_POINTS
#include "pcm_trace.h"
#else
#define trace_hwptr(substream, pos, in_interrupt)
#define trace_xrun(substream)
#define trace_hw_ptr_error(substream, reason)
ALSA: pcm: add 'applptr' event of tracepoint In design of ALSA PCM core, status and control data for runtime of ALSA PCM substream are shared between kernel/user spaces by page frame mapping with read-only attribute. Both of hardware-side and application-side position on PCM buffer are maintained as a part of the status data. In a view of ALSA PCM application, these two positions can be updated by executing ioctl(2) with some commands. There's an event of tracepoint for hardware-side position; 'hwptr'. On the other hand, no events for application-side position. This commit adds a new event for this purpose; 'applptr'. When the application-side position is changed in kernel space, this event is probed with useful information for developers. I note that the event is not probed for all of ALSA PCM applications, When applications are written by read/write programming scenario, the event is surely probed. The applications execute ioctl(2) with SNDRV_PCM_IOCTL_[READ|WRITE][N/I]_FRAMES to read/write any PCM frame, then ALSA PCM core updates the application-side position in kernel land. However, when applications are written by mmap programming scenario, if maintaining the application side position in kernel space accurately, applications should voluntarily execute ioctl(2) with SNDRV_PCM_IOCTL_SYNC_PTR to commit the number of handled PCM frames. If not voluntarily, the application-side position is not changed, thus the added event is not probed. There's a loophole, using architectures to which ALSA PCM core judges non cache coherent. In this case, the status and control data is not mapped into processe's VMA for any applications. Userland library, alsa-lib, is programmed for this case. It executes ioctl(2) with SNDRV_PCM_IOCTL_SYNC_PTR command every time to requiring the status and control data. ARM is such an architecture. Below is an example with serial sound interface (ssi) on i.mx6 quad core SoC. I use v4.1 kernel released by fsl-community with patches from VIA Tech. Inc. for VAB820, and my backport patches for relevant features for this patchset. I use Ubuntu 17.04 from ports.ubuntu.com as user land for armhf architecture. $ aplay -v -M -D hw:imx6vab820sgtl5,0 /dev/urandom -f S16_LE -r 48000 --period-size=128 --buffer-size=256 Playing raw data '/dev/urandom' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono Hardware PCM card 0 'imx6-vab820-sgtl5000' device 0 subdevice 0 Its setup is: stream : PLAYBACK access : MMAP_INTERLEAVED format : S16_LE subformat : STD channels : 1 rate : 48000 exact rate : 48000 (48000/1) msbits : 16 buffer_size : 256 period_size : 128 period_time : 2666 tstamp_mode : NONE tstamp_type : MONOTONIC period_step : 1 avail_min : 128 period_event : 0 start_threshold : 256 stop_threshold : 256 silence_threshold: 0 silence_size : 0 boundary : 1073741824 appl_ptr : 0 hw_ptr : 0 mmap_area[0] = 0x76f98000,0,16 (16) $ trace-cmd record -e snd_pcm:hwptr -e snd_pcm:applptr $ trace-cmd report ... 60.208495: applptr: pcmC0D0p/sub0: prev=1792, curr=1792, avail=0, period=128, buf=256 60.208633: applptr: pcmC0D0p/sub0: prev=1792, curr=1792, avail=0, period=128, buf=256 60.210022: hwptr: pcmC0D0p/sub0: IRQ: pos=128, old=1536, base=1536, period=128, buf=256 60.210202: applptr: pcmC0D0p/sub0: prev=1792, curr=1792, avail=128, period=128, buf=256 60.210344: hwptr: pcmC0D0p/sub0: POS: pos=128, old=1664, base=1536, period=128, buf=256 60.210348: applptr: pcmC0D0p/sub0: prev=1792, curr=1792, avail=128, period=128, buf=256 60.210486: applptr: pcmC0D0p/sub0: prev=1792, curr=1792, avail=128, period=128, buf=256 60.210626: applptr: pcmC0D0p/sub0: prev=1792, curr=1920, avail=0, period=128, buf=256 60.211002: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=0, period=128, buf=256 60.211142: hwptr: pcmC0D0p/sub0: POS: pos=128, old=1664, base=1536, period=128, buf=256 60.211146: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=0, period=128, buf=256 60.211287: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=0, period=128, buf=256 60.212690: hwptr: pcmC0D0p/sub0: IRQ: pos=0, old=1664, base=1536, period=128, buf=256 60.212866: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=128, period=128, buf=256 60.212999: hwptr: pcmC0D0p/sub0: POS: pos=0, old=1792, base=1792, period=128, buf=256 60.213003: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=128, period=128, buf=256 60.213135: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=128, period=128, buf=256 60.213276: applptr: pcmC0D0p/sub0: prev=1920, curr=2048, avail=0, period=128, buf=256 60.213654: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=0, period=128, buf=256 60.213796: hwptr: pcmC0D0p/sub0: POS: pos=0, old=1792, base=1792, period=128, buf=256 60.213800: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=0, period=128, buf=256 60.213937: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=0, period=128, buf=256 60.215356: hwptr: pcmC0D0p/sub0: IRQ: pos=128, old=1792, base=1792, period=128, buf=256 60.215542: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=128, period=128, buf=256 60.215679: hwptr: pcmC0D0p/sub0: POS: pos=128, old=1920, base=1792, period=128, buf=256 60.215683: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=128, period=128, buf=256 60.215813: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=128, period=128, buf=256 60.215947: applptr: pcmC0D0p/sub0: prev=2048, curr=2176, avail=0, period=128, buf=256 ... We can surely see 'applptr' event is probed even if the application run for mmap programming scenario ('-M' option and 'hw' plugin). Below is a result of strace: 02:44:15.886382 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.887203 poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL}], 1, -1) = 1 ([{fd=4, revents=POLLOUT}]) 02:44:15.887471 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.887637 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.887805 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.887969 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.888132 read(3, "..."..., 256) = 256 02:44:15.889040 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.889221 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.889431 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.889606 poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL}], 1, -1) = 1 ([{fd=4, revents=POLLOUT}]) 02:44:15.889833 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.889998 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.890164 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.891048 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.891228 read(3, "..."..., 256) = 256 02:44:15.891497 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.891661 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.891829 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.891991 poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL}], 1, -1) = 1 ([{fd=4, revents=POLLOUT}]) 02:44:15.893007 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 We can see 7 calls of ioctl(2) with SNDRV_PCM_IOCTL_SYNC_PTR per loop with call of poll(2). 128 PCM frames are transferred per loop of one poll(2), because the PCM substream is configured with S16_LE format and 1 channel (2 byte * 1 * 128 = 256 bytes). This equals to the size of period of PCM buffer. Comparing to the probed data, one of the 7 calls of ioctl(2) is actually used to commit the number of copied PCM frames to kernel space. The other calls are just used to check runtime status of PCM substream; e.g. XRUN. The tracepoint event is useful to investigate this case. I note that below modules are related to the above sample. * snd-soc-dummy.ko * snd-soc-imx-sgtl5000.ko * snd-soc-fsl-ssi.ko * snd-soc-imx-pcm-dma.ko * snd-soc-sgtl5000.ko My additional note is lock acquisition. The event is probed under acquiring PCM stream lock. This means that calculation in the event is free from any hardware events. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-06-12 08:41:45 +08:00
#define trace_applptr(substream, prev, curr)
ALSA: pcm: Replace PCM hwptr tracking with tracepoints ALSA PCM core has a mechanism tracking the PCM hwptr updates for analyzing XRUNs. But its log is limited (up to 10) and its log output is a kernel message, which is hard to handle. In this patch, the hwptr logging is moved to the tracing infrastructure instead of its own. Not only the hwptr updates but also XRUN and hwptr errors are recorded on the trace log, so that user can see such events at the exact timing. The new "snd_pcm" entry will appear in the tracing events: # ls -F /sys/kernel/debug/tracing/events/snd_pcm enable filter hw_ptr_error/ hwptr/ xrun/ The hwptr is for the regular hwptr update events. An event trace looks like: aplay-26187 [004] d..3 4012.834761: hwptr: pcmC0D0p/sub0: POS: pos=488, old=0, base=0, period=1024, buf=16384 "POS" shows the hwptr update by the explicit position update call and "IRQ" means the hwptr update by the interrupt, i.e. snd_pcm_period_elapsed() call. The "pos" is the passed ring-buffer offset by the caller, "old" is the previous hwptr, "base" is the hwptr base position, "period" and "buf" are period- and buffer-size of the target PCM substream. (Note that the hwptr position displayed here isn't the ring-buffer offset. It increments up to the PCM position boundary.) The XRUN event appears similarly, but without "pos" field. The hwptr error events appear with the PCM identifier and its reason string, such as "Lost interrupt?". The XRUN and hwptr error reports on kernel message are still left, can be turned on/off via xrun_debug proc like before. But the bit 3, 4, 5 and 6 bits of xrun_debug proc are dropped by this patch. Also, along with the change, the message strings have been reformatted to be a bit more consistent. Last but not least, the hwptr reporting is enabled only when CONFIG_SND_PCM_XRUN_DEBUG is set. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-11-04 19:45:59 +08:00
#endif
ALSA: pcm: Simplify snd_pcm_playback_silence() Use the existing silence helper codes for simplification. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:18:15 +08:00
static int fill_silence_frames(struct snd_pcm_substream *substream,
snd_pcm_uframes_t off, snd_pcm_uframes_t frames);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* fill ring buffer with silence
* runtime->silence_start: starting pointer to silence area
* runtime->silence_filled: size filled with silence
* runtime->silence_threshold: threshold from application
* runtime->silence_size: maximal size from application
*
* when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_runtime *runtime = substream->runtime;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
snd_pcm_uframes_t frames, ofs, transfer;
ALSA: pcm: Introduce copy_user, copy_kernel and fill_silence ops For supporting the explicit in-kernel copy of PCM buffer data, and also for further code refactoring, three new PCM ops, copy_user, copy_kernel and fill_silence, are introduced. The old copy and silence ops will be deprecated and removed later once when all callers are converted. The copy_kernel ops is the new one, and it's supposed to transfer the PCM data from the given kernel buffer to the hardware ring-buffer (or vice-versa depending on the stream direction), while the copy_user ops is equivalent with the former copy ops, to transfer the data from the user-space buffer. The major difference of the new copy_* and fill_silence ops from the previous ops is that the new ops take bytes instead of frames for size and position arguments. It has two merits: first, it allows the callback implementation often simpler (just call directly memcpy() & co), and second, it may unify the implementations of both interleaved and non-interleaved cases, as we'll see in the later patch. As of this stage, copy_kernel ops isn't referred yet, but only copy_user is used. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Acked-by: Mark Brown <broonie@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-11 02:02:35 +08:00
int err;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (runtime->silence_size < runtime->boundary) {
snd_pcm_sframes_t noise_dist, n;
if (runtime->silence_start != runtime->control->appl_ptr) {
n = runtime->control->appl_ptr - runtime->silence_start;
if (n < 0)
n += runtime->boundary;
if ((snd_pcm_uframes_t)n < runtime->silence_filled)
runtime->silence_filled -= n;
else
runtime->silence_filled = 0;
runtime->silence_start = runtime->control->appl_ptr;
}
[ALSA] pcm - Fix wrong asserts Modules: PCM Midlevel Fixed wrong or supreflous snd_assert()'s. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-12-07 22:28:07 +08:00
if (runtime->silence_filled >= runtime->buffer_size)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return;
noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled;
if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold)
return;
frames = runtime->silence_threshold - noise_dist;
if (frames > runtime->silence_size)
frames = runtime->silence_size;
} else {
if (new_hw_ptr == ULONG_MAX) { /* initialization */
snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime);
ALSA: pcm core - add a safe check to the silence filling function In situation when appl_ptr is far greater then hw_ptr, the hw_avail value can be greater than buffer_size. Check for this. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-07-19 22:37:39 +08:00
if (avail > runtime->buffer_size)
avail = runtime->buffer_size;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
runtime->silence_filled = avail > 0 ? avail : 0;
runtime->silence_start = (runtime->status->hw_ptr +
runtime->silence_filled) %
runtime->boundary;
} else {
ofs = runtime->status->hw_ptr;
frames = new_hw_ptr - ofs;
if ((snd_pcm_sframes_t)frames < 0)
frames += runtime->boundary;
runtime->silence_filled -= frames;
if ((snd_pcm_sframes_t)runtime->silence_filled < 0) {
runtime->silence_filled = 0;
[ALSA] pcm core: fix silence_start calculations The case where silence_size < boundary was broken because different parts of the snd_pcm_playback_silence() function disagreed about whether silence_start should point to the start or to the end of the buffer part to be silenced. This patch changes the code to always use to the start, which also simplifies several calculations. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2006-10-23 22:26:57 +08:00
runtime->silence_start = new_hw_ptr;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
} else {
[ALSA] pcm core: fix silence_start calculations The case where silence_size < boundary was broken because different parts of the snd_pcm_playback_silence() function disagreed about whether silence_start should point to the start or to the end of the buffer part to be silenced. This patch changes the code to always use to the start, which also simplifies several calculations. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2006-10-23 22:26:57 +08:00
runtime->silence_start = ofs;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
}
frames = runtime->buffer_size - runtime->silence_filled;
}
ALSA: Kill snd_assert() in sound/core/* Kill snd_assert() in sound/core/*, either removed or replaced with if () with snd_BUG_ON(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-08-08 23:09:09 +08:00
if (snd_BUG_ON(frames > runtime->buffer_size))
return;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (frames == 0)
return;
[ALSA] pcm core: fix silence_start calculations The case where silence_size < boundary was broken because different parts of the snd_pcm_playback_silence() function disagreed about whether silence_start should point to the start or to the end of the buffer part to be silenced. This patch changes the code to always use to the start, which also simplifies several calculations. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2006-10-23 22:26:57 +08:00
ofs = runtime->silence_start % runtime->buffer_size;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
while (frames > 0) {
transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames;
ALSA: pcm: Simplify snd_pcm_playback_silence() Use the existing silence helper codes for simplification. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:18:15 +08:00
err = fill_silence_frames(substream, ofs, transfer);
snd_BUG_ON(err < 0);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
runtime->silence_filled += transfer;
frames -= transfer;
ofs = 0;
}
}
ALSA: Make snd_pcm_debug_name usable outside pcm_lib Formatting a PCM name is useful for module debug too. Add snd_prefix when making function public. [minor coding-style fixes by tiwai] Signed-off-by: Eliot Blennerhassett <eblennerhassett@audioscience.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-07-23 08:36:25 +08:00
#ifdef CONFIG_SND_DEBUG
void snd_pcm_debug_name(struct snd_pcm_substream *substream,
ALSA: pcm - A helper function to compose PCM stream name for debug prints Use a common helper function for the PCM stream name displayed in XRUN and buffer-pointer debug prints. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-06-08 21:58:48 +08:00
char *name, size_t len)
{
snprintf(name, len, "pcmC%dD%d%c:%d",
substream->pcm->card->number,
substream->pcm->device,
substream->stream ? 'c' : 'p',
substream->number);
}
ALSA: Make snd_pcm_debug_name usable outside pcm_lib Formatting a PCM name is useful for module debug too. Add snd_prefix when making function public. [minor coding-style fixes by tiwai] Signed-off-by: Eliot Blennerhassett <eblennerhassett@audioscience.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-07-23 08:36:25 +08:00
EXPORT_SYMBOL(snd_pcm_debug_name);
#endif
ALSA: pcm - A helper function to compose PCM stream name for debug prints Use a common helper function for the PCM stream name displayed in XRUN and buffer-pointer debug prints. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-06-08 21:58:48 +08:00
ALSA: pcm_lib.c - convert second xrun_debug() parameter to use defines To increase code readability, convert send xrun_debug() argument to use defines. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2009-12-18 00:34:39 +08:00
#define XRUN_DEBUG_BASIC (1<<0)
#define XRUN_DEBUG_STACK (1<<1) /* dump also stack */
#define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */
ALSA: Rewrite hw_ptr updaters Clean up and improve snd_pcm_update_hw_ptr*() functions. snd_pcm_update_hw_ptr() tries to detect the unexpected hwptr jumps more strictly to avoid the position mess-up, which often results in the bad quality I/O with pulseaudio. The hw-ptr skip error messages are printed when xrun proc is set to non-zero. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-03-04 00:00:15 +08:00
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
ALSA: pcm_lib - add possibility to log last 10 DMA ring buffer positions In some debug cases, it might be usefull to see previous ring buffer positions to determine position problems from the lowlevel drivers. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2009-12-20 18:47:57 +08:00
ALSA: pcm_lib.c - convert second xrun_debug() parameter to use defines To increase code readability, convert send xrun_debug() argument to use defines. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2009-12-18 00:34:39 +08:00
#define xrun_debug(substream, mask) \
((substream)->pstr->xrun_debug & (mask))
ALSA: pcm_lib - fix xrun functionality The commit 4d96eb255c53ab5e39b37fd4d484ea3dc39ab456 broke the interrupt time xrun functionality (stream stop etc.) if the CONFIG_SND_PCM_XRUN_DEBUG is not set. This is because the xrun() is null defined without it. Fix this by letting the function xrun() to be always defined as it was before. Signed-off-by: Jarkko Nikula <jhnikula@gmail.com> Cc: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-03-26 22:07:25 +08:00
#else
#define xrun_debug(substream, mask) 0
#endif
ALSA: Rewrite hw_ptr updaters Clean up and improve snd_pcm_update_hw_ptr*() functions. snd_pcm_update_hw_ptr() tries to detect the unexpected hwptr jumps more strictly to avoid the position mess-up, which often results in the bad quality I/O with pulseaudio. The hw-ptr skip error messages are printed when xrun proc is set to non-zero. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-03-04 00:00:15 +08:00
ALSA: pcm_lib.c - convert second xrun_debug() parameter to use defines To increase code readability, convert send xrun_debug() argument to use defines. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2009-12-18 00:34:39 +08:00
#define dump_stack_on_xrun(substream) do { \
if (xrun_debug(substream, XRUN_DEBUG_STACK)) \
dump_stack(); \
ALSA: Rewrite hw_ptr updaters Clean up and improve snd_pcm_update_hw_ptr*() functions. snd_pcm_update_hw_ptr() tries to detect the unexpected hwptr jumps more strictly to avoid the position mess-up, which often results in the bad quality I/O with pulseaudio. The hw-ptr skip error messages are printed when xrun proc is set to non-zero. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-03-04 00:00:15 +08:00
} while (0)
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
static void xrun(struct snd_pcm_substream *substream)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
ALSA: PCM midlevel: Do not update hw_ptr_jiffies when hw_ptr is not changed Some hardware might have bigger FIFOs and DMA pointer value will be updated in large chunks. Do not update hw_ptr_jiffies and position timestamp when hw_ptr value was not changed. Signed-off-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-05-28 17:31:20 +08:00
struct snd_pcm_runtime *runtime = substream->runtime;
ALSA: pcm: Replace PCM hwptr tracking with tracepoints ALSA PCM core has a mechanism tracking the PCM hwptr updates for analyzing XRUNs. But its log is limited (up to 10) and its log output is a kernel message, which is hard to handle. In this patch, the hwptr logging is moved to the tracing infrastructure instead of its own. Not only the hwptr updates but also XRUN and hwptr errors are recorded on the trace log, so that user can see such events at the exact timing. The new "snd_pcm" entry will appear in the tracing events: # ls -F /sys/kernel/debug/tracing/events/snd_pcm enable filter hw_ptr_error/ hwptr/ xrun/ The hwptr is for the regular hwptr update events. An event trace looks like: aplay-26187 [004] d..3 4012.834761: hwptr: pcmC0D0p/sub0: POS: pos=488, old=0, base=0, period=1024, buf=16384 "POS" shows the hwptr update by the explicit position update call and "IRQ" means the hwptr update by the interrupt, i.e. snd_pcm_period_elapsed() call. The "pos" is the passed ring-buffer offset by the caller, "old" is the previous hwptr, "base" is the hwptr base position, "period" and "buf" are period- and buffer-size of the target PCM substream. (Note that the hwptr position displayed here isn't the ring-buffer offset. It increments up to the PCM position boundary.) The XRUN event appears similarly, but without "pos" field. The hwptr error events appear with the PCM identifier and its reason string, such as "Lost interrupt?". The XRUN and hwptr error reports on kernel message are still left, can be turned on/off via xrun_debug proc like before. But the bit 3, 4, 5 and 6 bits of xrun_debug proc are dropped by this patch. Also, along with the change, the message strings have been reformatted to be a bit more consistent. Last but not least, the hwptr reporting is enabled only when CONFIG_SND_PCM_XRUN_DEBUG is set. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-11-04 19:45:59 +08:00
trace_xrun(substream);
ALSA: PCM midlevel: Do not update hw_ptr_jiffies when hw_ptr is not changed Some hardware might have bigger FIFOs and DMA pointer value will be updated in large chunks. Do not update hw_ptr_jiffies and position timestamp when hw_ptr value was not changed. Signed-off-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-05-28 17:31:20 +08:00
if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
ALSA: pcm_lib.c - convert second xrun_debug() parameter to use defines To increase code readability, convert send xrun_debug() argument to use defines. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2009-12-18 00:34:39 +08:00
if (xrun_debug(substream, XRUN_DEBUG_BASIC)) {
ALSA: pcm - A helper function to compose PCM stream name for debug prints Use a common helper function for the PCM stream name displayed in XRUN and buffer-pointer debug prints. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-06-08 21:58:48 +08:00
char name[16];
ALSA: Make snd_pcm_debug_name usable outside pcm_lib Formatting a PCM name is useful for module debug too. Add snd_prefix when making function public. [minor coding-style fixes by tiwai] Signed-off-by: Eliot Blennerhassett <eblennerhassett@audioscience.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-07-23 08:36:25 +08:00
snd_pcm_debug_name(substream, name, sizeof(name));
ALSA: pcm: Use standard printk helpers Use dev_err() & co as much as possible. If not available (no device assigned at the calling point), use pr_xxx() helpers instead. For simplicity, introduce new helpers for pcm stream, pcm_err(), etc. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-02-05 01:19:48 +08:00
pcm_warn(substream->pcm, "XRUN: %s\n", name);
ALSA: Rewrite hw_ptr updaters Clean up and improve snd_pcm_update_hw_ptr*() functions. snd_pcm_update_hw_ptr() tries to detect the unexpected hwptr jumps more strictly to avoid the position mess-up, which often results in the bad quality I/O with pulseaudio. The hw-ptr skip error messages are printed when xrun proc is set to non-zero. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-03-04 00:00:15 +08:00
dump_stack_on_xrun(substream);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
}
ALSA: pcm_lib - fix xrun functionality The commit 4d96eb255c53ab5e39b37fd4d484ea3dc39ab456 broke the interrupt time xrun functionality (stream stop etc.) if the CONFIG_SND_PCM_XRUN_DEBUG is not set. This is because the xrun() is null defined without it. Fix this by letting the function xrun() to be always defined as it was before. Signed-off-by: Jarkko Nikula <jhnikula@gmail.com> Cc: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-03-26 22:07:25 +08:00
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
ALSA: pcm: Replace PCM hwptr tracking with tracepoints ALSA PCM core has a mechanism tracking the PCM hwptr updates for analyzing XRUNs. But its log is limited (up to 10) and its log output is a kernel message, which is hard to handle. In this patch, the hwptr logging is moved to the tracing infrastructure instead of its own. Not only the hwptr updates but also XRUN and hwptr errors are recorded on the trace log, so that user can see such events at the exact timing. The new "snd_pcm" entry will appear in the tracing events: # ls -F /sys/kernel/debug/tracing/events/snd_pcm enable filter hw_ptr_error/ hwptr/ xrun/ The hwptr is for the regular hwptr update events. An event trace looks like: aplay-26187 [004] d..3 4012.834761: hwptr: pcmC0D0p/sub0: POS: pos=488, old=0, base=0, period=1024, buf=16384 "POS" shows the hwptr update by the explicit position update call and "IRQ" means the hwptr update by the interrupt, i.e. snd_pcm_period_elapsed() call. The "pos" is the passed ring-buffer offset by the caller, "old" is the previous hwptr, "base" is the hwptr base position, "period" and "buf" are period- and buffer-size of the target PCM substream. (Note that the hwptr position displayed here isn't the ring-buffer offset. It increments up to the PCM position boundary.) The XRUN event appears similarly, but without "pos" field. The hwptr error events appear with the PCM identifier and its reason string, such as "Lost interrupt?". The XRUN and hwptr error reports on kernel message are still left, can be turned on/off via xrun_debug proc like before. But the bit 3, 4, 5 and 6 bits of xrun_debug proc are dropped by this patch. Also, along with the change, the message strings have been reformatted to be a bit more consistent. Last but not least, the hwptr reporting is enabled only when CONFIG_SND_PCM_XRUN_DEBUG is set. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-11-04 19:45:59 +08:00
#define hw_ptr_error(substream, in_interrupt, reason, fmt, args...) \
ALSA: pcm_lib - add possibility to log last 10 DMA ring buffer positions In some debug cases, it might be usefull to see previous ring buffer positions to determine position problems from the lowlevel drivers. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2009-12-20 18:47:57 +08:00
do { \
ALSA: pcm: Replace PCM hwptr tracking with tracepoints ALSA PCM core has a mechanism tracking the PCM hwptr updates for analyzing XRUNs. But its log is limited (up to 10) and its log output is a kernel message, which is hard to handle. In this patch, the hwptr logging is moved to the tracing infrastructure instead of its own. Not only the hwptr updates but also XRUN and hwptr errors are recorded on the trace log, so that user can see such events at the exact timing. The new "snd_pcm" entry will appear in the tracing events: # ls -F /sys/kernel/debug/tracing/events/snd_pcm enable filter hw_ptr_error/ hwptr/ xrun/ The hwptr is for the regular hwptr update events. An event trace looks like: aplay-26187 [004] d..3 4012.834761: hwptr: pcmC0D0p/sub0: POS: pos=488, old=0, base=0, period=1024, buf=16384 "POS" shows the hwptr update by the explicit position update call and "IRQ" means the hwptr update by the interrupt, i.e. snd_pcm_period_elapsed() call. The "pos" is the passed ring-buffer offset by the caller, "old" is the previous hwptr, "base" is the hwptr base position, "period" and "buf" are period- and buffer-size of the target PCM substream. (Note that the hwptr position displayed here isn't the ring-buffer offset. It increments up to the PCM position boundary.) The XRUN event appears similarly, but without "pos" field. The hwptr error events appear with the PCM identifier and its reason string, such as "Lost interrupt?". The XRUN and hwptr error reports on kernel message are still left, can be turned on/off via xrun_debug proc like before. But the bit 3, 4, 5 and 6 bits of xrun_debug proc are dropped by this patch. Also, along with the change, the message strings have been reformatted to be a bit more consistent. Last but not least, the hwptr reporting is enabled only when CONFIG_SND_PCM_XRUN_DEBUG is set. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-11-04 19:45:59 +08:00
trace_hw_ptr_error(substream, reason); \
ALSA: pcm_lib - add possibility to log last 10 DMA ring buffer positions In some debug cases, it might be usefull to see previous ring buffer positions to determine position problems from the lowlevel drivers. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2009-12-20 18:47:57 +08:00
if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \
ALSA: pcm: Replace PCM hwptr tracking with tracepoints ALSA PCM core has a mechanism tracking the PCM hwptr updates for analyzing XRUNs. But its log is limited (up to 10) and its log output is a kernel message, which is hard to handle. In this patch, the hwptr logging is moved to the tracing infrastructure instead of its own. Not only the hwptr updates but also XRUN and hwptr errors are recorded on the trace log, so that user can see such events at the exact timing. The new "snd_pcm" entry will appear in the tracing events: # ls -F /sys/kernel/debug/tracing/events/snd_pcm enable filter hw_ptr_error/ hwptr/ xrun/ The hwptr is for the regular hwptr update events. An event trace looks like: aplay-26187 [004] d..3 4012.834761: hwptr: pcmC0D0p/sub0: POS: pos=488, old=0, base=0, period=1024, buf=16384 "POS" shows the hwptr update by the explicit position update call and "IRQ" means the hwptr update by the interrupt, i.e. snd_pcm_period_elapsed() call. The "pos" is the passed ring-buffer offset by the caller, "old" is the previous hwptr, "base" is the hwptr base position, "period" and "buf" are period- and buffer-size of the target PCM substream. (Note that the hwptr position displayed here isn't the ring-buffer offset. It increments up to the PCM position boundary.) The XRUN event appears similarly, but without "pos" field. The hwptr error events appear with the PCM identifier and its reason string, such as "Lost interrupt?". The XRUN and hwptr error reports on kernel message are still left, can be turned on/off via xrun_debug proc like before. But the bit 3, 4, 5 and 6 bits of xrun_debug proc are dropped by this patch. Also, along with the change, the message strings have been reformatted to be a bit more consistent. Last but not least, the hwptr reporting is enabled only when CONFIG_SND_PCM_XRUN_DEBUG is set. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-11-04 19:45:59 +08:00
pr_err_ratelimited("ALSA: PCM: [%c] " reason ": " fmt, \
(in_interrupt) ? 'Q' : 'P', ##args); \
ALSA: pcm_lib - add possibility to log last 10 DMA ring buffer positions In some debug cases, it might be usefull to see previous ring buffer positions to determine position problems from the lowlevel drivers. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2009-12-20 18:47:57 +08:00
dump_stack_on_xrun(substream); \
} \
} while (0)
#else /* ! CONFIG_SND_PCM_XRUN_DEBUG */
#define hw_ptr_error(substream, fmt, args...) do { } while (0)
#endif
ALSA: pcm_lib - optimize wake_up() calls for PCM I/O As noted by pl bossart <bossart.nospam@gmail.com>, the PCM I/O routines (snd_pcm_lib_write1, snd_pcm_lib_read1) should block wake_up() calls until all samples are not processed. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-07 22:36:31 +08:00
int snd_pcm_update_state(struct snd_pcm_substream *substream,
struct snd_pcm_runtime *runtime)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
snd_pcm_uframes_t avail;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
avail = snd_pcm_playback_avail(runtime);
else
avail = snd_pcm_capture_avail(runtime);
if (avail > runtime->avail_max)
runtime->avail_max = avail;
ALSA: pcm - Fix drain behavior in non-blocking mode The current PCM core has the following problems regarding PCM draining in non-blocking mode: - the current f_flags isn't checked in snd_pcm_drain(), thus changing the mode dynamically via snd_pcm_nonblock() after open doesn't work. - calling drain in non-blocking mode just return -EAGAIN error, but doesn't provide any way to sync with draining. This patch fixes these issues. - check file->f_flags in snd_pcm_drain() properly - when O_NONBLOCK is set, PCM core sets the stream(s) to DRAIN state but quits ioctl immediately without waiting the whole drain; the caller can sync the drain manually via poll() Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-08-20 22:40:16 +08:00
if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
if (avail >= runtime->buffer_size) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
snd_pcm_drain_done(substream);
ALSA: pcm - Fix drain behavior in non-blocking mode The current PCM core has the following problems regarding PCM draining in non-blocking mode: - the current f_flags isn't checked in snd_pcm_drain(), thus changing the mode dynamically via snd_pcm_nonblock() after open doesn't work. - calling drain in non-blocking mode just return -EAGAIN error, but doesn't provide any way to sync with draining. This patch fixes these issues. - check file->f_flags in snd_pcm_drain() properly - when O_NONBLOCK is set, PCM core sets the stream(s) to DRAIN state but quits ioctl immediately without waiting the whole drain; the caller can sync the drain manually via poll() Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-08-20 22:40:16 +08:00
return -EPIPE;
}
} else {
if (avail >= runtime->stop_threshold) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
xrun(substream);
ALSA: pcm - Fix drain behavior in non-blocking mode The current PCM core has the following problems regarding PCM draining in non-blocking mode: - the current f_flags isn't checked in snd_pcm_drain(), thus changing the mode dynamically via snd_pcm_nonblock() after open doesn't work. - calling drain in non-blocking mode just return -EAGAIN error, but doesn't provide any way to sync with draining. This patch fixes these issues. - check file->f_flags in snd_pcm_drain() properly - when O_NONBLOCK is set, PCM core sets the stream(s) to DRAIN state but quits ioctl immediately without waiting the whole drain; the caller can sync the drain manually via poll() Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-08-20 22:40:16 +08:00
return -EPIPE;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
ALSA: pcm_lib: avoid timing jitter in snd_pcm_read/write() When using poll() to wait for the next period -- or avail_min samples -- one gets a consistent delay for each system call that is usually just a little short of the selected period time. However, When using snd_pcm_read/write(), one gets a jittery delay that alternates between less than a millisecond and approximately two period times. This is caused by snd_pcm_lib_{read,write}1() transferring any available samples to the user's buffer and adjusting the application pointer prior to sleeping to the end of the current period. When the next period interrupt occurs, there is then less than avail_min samples remaining to be transferred in the period, so we end up sleeping until a second period occurs. This is solved by using runtime->twake as the number of samples needed for a wakeup in addition to selecting the proper wait queue to wake in snd_pcm_update_state(). This requires twake to be non-zero when used by snd_pcm_lib_{read,write}1() even if avail_min is zero. Signed-off-by: Dave Dillow <dave@thedillows.org> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-06-27 06:13:20 +08:00
if (runtime->twake) {
if (avail >= runtime->twake)
wake_up(&runtime->tsleep);
} else if (avail >= runtime->control->avail_min)
wake_up(&runtime->sleep);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return 0;
}
ALSA: core: add .get_time_info Introduce more generic .get_time_info to retrieve system timestamp and audio timestamp in single routine. Backwards compatibility is preserved with same functionality as with .wall_clock method (to be removed in following commits to avoid breaking git bisect) Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-14 05:14:06 +08:00
static void update_audio_tstamp(struct snd_pcm_substream *substream,
struct timespec *curr_tstamp,
struct timespec *audio_tstamp)
{
struct snd_pcm_runtime *runtime = substream->runtime;
u64 audio_frames, audio_nsecs;
struct timespec driver_tstamp;
if (runtime->tstamp_mode != SNDRV_PCM_TSTAMP_ENABLE)
return;
if (!(substream->ops->get_time_info) ||
(runtime->audio_tstamp_report.actual_type ==
SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) {
/*
* provide audio timestamp derived from pointer position
* add delay only if requested
*/
audio_frames = runtime->hw_ptr_wrap + runtime->status->hw_ptr;
if (runtime->audio_tstamp_config.report_delay) {
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
audio_frames -= runtime->delay;
else
audio_frames += runtime->delay;
}
audio_nsecs = div_u64(audio_frames * 1000000000LL,
runtime->rate);
*audio_tstamp = ns_to_timespec(audio_nsecs);
}
runtime->status->audio_tstamp = *audio_tstamp;
runtime->status->tstamp = *curr_tstamp;
/*
* re-take a driver timestamp to let apps detect if the reference tstamp
* read by low-level hardware was provided with a delay
*/
snd_pcm_gettime(substream->runtime, (struct timespec *)&driver_tstamp);
runtime->driver_tstamp = driver_tstamp;
}
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream,
unsigned int in_interrupt)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_runtime *runtime = substream->runtime;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
snd_pcm_uframes_t pos;
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base;
[ALSA] pcm-midlevel: Add more strict buffer position checks based on jiffies Some drivers like Intel8x0 or Intel HDA are broken for some hardware variants. This patch adds more strict buffer position checks based on jiffies when internal hw_ptr is updated. Enable xrun_debug to see mangling of wrong positions. As a side effect, the hw_ptr interrupt update routine might do slightly better job when many interrupts are lost. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2009-04-10 18:28:58 +08:00
snd_pcm_sframes_t hdelta, delta;
unsigned long jdelta;
ALSA: core: group read of pointer, tstamp and jiffies Group read of hw_ptr, tstamp and jiffies in a sequence for better correlation. Previous code took timestamp at the end, which could introduce delays between audio time and system time. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-05-23 03:54:02 +08:00
unsigned long curr_jiffies;
struct timespec curr_tstamp;
ALSA: core: add hooks for audio timestamps ALSA did not provide any direct means to infer the audio time for A/V sync and system/audio time correlations (eg. PulseAudio). Applications had to track the number of samples read/written and add/subtract the number of samples queued in the ring buffer. This accounting led to small errors, typically several samples, due to the two-step process. Computing the audio time in the kernel is more direct, as all the information is available in the same routines. Also add new .audio_wallclock routine to enable fine-grain synchronization between monotonic system time and audio hardware time. Using the wallclock, if supported in hardware, allows for a much better sub-microsecond precision and a common drift tracking for all devices sharing the same wall clock (master clock). Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:15 +08:00
struct timespec audio_tstamp;
ALSA: core: keep track of boundary wrap-around Keep track of boundary crossing when hw_ptr exceeds boundary limit and wraps-around. This will help keep track of total number of frames played/received at the kernel level Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:14 +08:00
int crossed_boundary = 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
[ALSA] pcm-midlevel: Add more strict buffer position checks based on jiffies Some drivers like Intel8x0 or Intel HDA are broken for some hardware variants. This patch adds more strict buffer position checks based on jiffies when internal hw_ptr is updated. Enable xrun_debug to see mangling of wrong positions. As a side effect, the hw_ptr interrupt update routine might do slightly better job when many interrupts are lost. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2009-04-10 18:28:58 +08:00
old_hw_ptr = runtime->status->hw_ptr;
ALSA: core: group read of pointer, tstamp and jiffies Group read of hw_ptr, tstamp and jiffies in a sequence for better correlation. Previous code took timestamp at the end, which could introduce delays between audio time and system time. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-05-23 03:54:02 +08:00
/*
* group pointer, time and jiffies reads to allow for more
* accurate correlations/corrections.
* The values are stored at the end of this routine after
* corrections for hw_ptr position
*/
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
pos = substream->ops->pointer(substream);
ALSA: core: group read of pointer, tstamp and jiffies Group read of hw_ptr, tstamp and jiffies in a sequence for better correlation. Previous code took timestamp at the end, which could introduce delays between audio time and system time. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-05-23 03:54:02 +08:00
curr_jiffies = jiffies;
ALSA: core: add hooks for audio timestamps ALSA did not provide any direct means to infer the audio time for A/V sync and system/audio time correlations (eg. PulseAudio). Applications had to track the number of samples read/written and add/subtract the number of samples queued in the ring buffer. This accounting led to small errors, typically several samples, due to the two-step process. Computing the audio time in the kernel is more direct, as all the information is available in the same routines. Also add new .audio_wallclock routine to enable fine-grain synchronization between monotonic system time and audio hardware time. Using the wallclock, if supported in hardware, allows for a much better sub-microsecond precision and a common drift tracking for all devices sharing the same wall clock (master clock). Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:15 +08:00
if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
ALSA: core: add .get_time_info Introduce more generic .get_time_info to retrieve system timestamp and audio timestamp in single routine. Backwards compatibility is preserved with same functionality as with .wall_clock method (to be removed in following commits to avoid breaking git bisect) Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-14 05:14:06 +08:00
if ((substream->ops->get_time_info) &&
(runtime->audio_tstamp_config.type_requested != SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) {
substream->ops->get_time_info(substream, &curr_tstamp,
&audio_tstamp,
&runtime->audio_tstamp_config,
&runtime->audio_tstamp_report);
/* re-test in case tstamp type is not supported in hardware and was demoted to DEFAULT */
if (runtime->audio_tstamp_report.actual_type == SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)
snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp);
} else
snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp);
ALSA: core: add hooks for audio timestamps ALSA did not provide any direct means to infer the audio time for A/V sync and system/audio time correlations (eg. PulseAudio). Applications had to track the number of samples read/written and add/subtract the number of samples queued in the ring buffer. This accounting led to small errors, typically several samples, due to the two-step process. Computing the audio time in the kernel is more direct, as all the information is available in the same routines. Also add new .audio_wallclock routine to enable fine-grain synchronization between monotonic system time and audio hardware time. Using the wallclock, if supported in hardware, allows for a much better sub-microsecond precision and a common drift tracking for all devices sharing the same wall clock (master clock). Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:15 +08:00
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (pos == SNDRV_PCM_POS_XRUN) {
xrun(substream);
return -EPIPE;
}
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
if (pos >= runtime->buffer_size) {
ALSA: pcm: Use standard printk helpers Use dev_err() & co as much as possible. If not available (no device assigned at the calling point), use pr_xxx() helpers instead. For simplicity, introduce new helpers for pcm stream, pcm_err(), etc. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-02-05 01:19:48 +08:00
if (printk_ratelimit()) {
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
char name[16];
ALSA: Make snd_pcm_debug_name usable outside pcm_lib Formatting a PCM name is useful for module debug too. Add snd_prefix when making function public. [minor coding-style fixes by tiwai] Signed-off-by: Eliot Blennerhassett <eblennerhassett@audioscience.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-07-23 08:36:25 +08:00
snd_pcm_debug_name(substream, name, sizeof(name));
ALSA: pcm: Use standard printk helpers Use dev_err() & co as much as possible. If not available (no device assigned at the calling point), use pr_xxx() helpers instead. For simplicity, introduce new helpers for pcm stream, pcm_err(), etc. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-02-05 01:19:48 +08:00
pcm_err(substream->pcm,
ALSA: pcm: Avoid "BUG:" string for warnings again The commit [d507941beb1e: ALSA: pcm: Correct PCM BUG error message] made the warning prefix back to "BUG:" due to its previous wrong prefix. But a kernel message containing "BUG:" seems taken as an Oops message wrongly by some brain-dead daemons, and it annoys users in the end. Instead of teaching daemons, change the string again to a more reasonable one. Fixes: 507941beb1e ('ALSA: pcm: Correct PCM BUG error message') Cc: <stable@vger.kernel.org> # v3.19+ Signed-off-by: Takashi Iwai <tiwai@suse.de>
2016-03-11 03:56:20 +08:00
"invalid position: %s, pos = %ld, buffer size = %ld, period size = %ld\n",
ALSA: pcm: Use standard printk helpers Use dev_err() & co as much as possible. If not available (no device assigned at the calling point), use pr_xxx() helpers instead. For simplicity, introduce new helpers for pcm stream, pcm_err(), etc. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-02-05 01:19:48 +08:00
name, pos, runtime->buffer_size,
runtime->period_size);
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
}
pos = 0;
ALSA: pcm - Add logging of hwptr updates and interrupt updates Added the logging functionality to xrun_debug to record the hwptr updates via snd_pcm_update_hw_ptr() and snd_pcm_update_hwptr_interrupt(), corresponding to 16 and 8, respectively. For example, # echo 9 > /proc/asound/card0/pcm0p/xrun_debug will record the position and other parameters at each period interrupt together with the normal XRUN debugging. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-07-23 17:04:13 +08:00
}
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
pos -= pos % runtime->min_align;
ALSA: pcm: Replace PCM hwptr tracking with tracepoints ALSA PCM core has a mechanism tracking the PCM hwptr updates for analyzing XRUNs. But its log is limited (up to 10) and its log output is a kernel message, which is hard to handle. In this patch, the hwptr logging is moved to the tracing infrastructure instead of its own. Not only the hwptr updates but also XRUN and hwptr errors are recorded on the trace log, so that user can see such events at the exact timing. The new "snd_pcm" entry will appear in the tracing events: # ls -F /sys/kernel/debug/tracing/events/snd_pcm enable filter hw_ptr_error/ hwptr/ xrun/ The hwptr is for the regular hwptr update events. An event trace looks like: aplay-26187 [004] d..3 4012.834761: hwptr: pcmC0D0p/sub0: POS: pos=488, old=0, base=0, period=1024, buf=16384 "POS" shows the hwptr update by the explicit position update call and "IRQ" means the hwptr update by the interrupt, i.e. snd_pcm_period_elapsed() call. The "pos" is the passed ring-buffer offset by the caller, "old" is the previous hwptr, "base" is the hwptr base position, "period" and "buf" are period- and buffer-size of the target PCM substream. (Note that the hwptr position displayed here isn't the ring-buffer offset. It increments up to the PCM position boundary.) The XRUN event appears similarly, but without "pos" field. The hwptr error events appear with the PCM identifier and its reason string, such as "Lost interrupt?". The XRUN and hwptr error reports on kernel message are still left, can be turned on/off via xrun_debug proc like before. But the bit 3, 4, 5 and 6 bits of xrun_debug proc are dropped by this patch. Also, along with the change, the message strings have been reformatted to be a bit more consistent. Last but not least, the hwptr reporting is enabled only when CONFIG_SND_PCM_XRUN_DEBUG is set. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-11-04 19:45:59 +08:00
trace_hwptr(substream, pos, in_interrupt);
ALSA: Rewrite hw_ptr updaters Clean up and improve snd_pcm_update_hw_ptr*() functions. snd_pcm_update_hw_ptr() tries to detect the unexpected hwptr jumps more strictly to avoid the position mess-up, which often results in the bad quality I/O with pulseaudio. The hw-ptr skip error messages are printed when xrun proc is set to non-zero. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-03-04 00:00:15 +08:00
hw_base = runtime->hw_ptr_base;
new_hw_ptr = hw_base + pos;
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
if (in_interrupt) {
/* we know that one period was processed */
/* delta = "expected next hw_ptr" for in_interrupt != 0 */
ALSA: pcm_lib - return back hw_ptr_interrupt Clemens Ladisch noted for hw_ptr_removal in "cleanup & merge hw_ptr update functions" commit: "It is possible for the status/delay ioctls to be called when the sound card's pointer register alreay shows a position at the beginning of the new period, but immediately before the interrupt is actually executed. (This happens regularly on a SMP machine with mplayer.) When that happens, the code thinks that the position must be at least one period ahead of the current position and drops an entire buffer of data." Return back the hw_ptr_interrupt variable. The last interrupt pointer is always computed from the latest hw_ptr instead of tracking it separately (in this case all hw_ptr checks and modifications might influence also hw_ptr_interrupt and it is difficult to keep it consistent). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-27 00:08:24 +08:00
delta = runtime->hw_ptr_interrupt + runtime->period_size;
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
if (delta > new_hw_ptr) {
ALSA: pcm midlevel code - add time check for double interrupt acknowledge The current code in pcm_lib.c do all checks using only the position in the ring buffer. Unfortunately, where the interrupts gets delayed or merged into one, we need another timing source to check when the buffer size boundary overlaps to avoid the wrong updating of the ring buffer pointers. This code uses jiffies to check the right time window without any performance impact. Signed-off-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-08-18 20:16:54 +08:00
/* check for double acknowledged interrupts */
ALSA: core: group read of pointer, tstamp and jiffies Group read of hw_ptr, tstamp and jiffies in a sequence for better correlation. Previous code took timestamp at the end, which could introduce delays between audio time and system time. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-05-23 03:54:02 +08:00
hdelta = curr_jiffies - runtime->hw_ptr_jiffies;
ALSA: pcm: Modify double acknowledged interrupts check condition Currently in snd_pcm_update_hw_ptr0 during interrupt, we consider there were double acknowledged interrupts when: 1. HW reported pointer is smaller than expected, and 2. Time from last update time (hdelta) is over half a buffer time. However, when HW reported pointer is only a few bytes smaller than expected, and when hdelta is just a little larger than half a buffer time (e.g. ping-pong buffer), it wrongly treats this IRQ as double acknowledged. The condition #2 uses jiffies, but jiffies is not high resolution since it is integer. We should consider jiffies inaccuracy. Signed-off-by: Koro Chen <koro.chen@mediatek.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-05-13 22:39:03 +08:00
if (hdelta > runtime->hw_ptr_buffer_jiffies/2 + 1) {
ALSA: pcm midlevel code - add time check for double interrupt acknowledge The current code in pcm_lib.c do all checks using only the position in the ring buffer. Unfortunately, where the interrupts gets delayed or merged into one, we need another timing source to check when the buffer size boundary overlaps to avoid the wrong updating of the ring buffer pointers. This code uses jiffies to check the right time window without any performance impact. Signed-off-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-08-18 20:16:54 +08:00
hw_base += runtime->buffer_size;
ALSA: core: keep track of boundary wrap-around Keep track of boundary crossing when hw_ptr exceeds boundary limit and wraps-around. This will help keep track of total number of frames played/received at the kernel level Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:14 +08:00
if (hw_base >= runtime->boundary) {
ALSA: pcm midlevel code - add time check for double interrupt acknowledge The current code in pcm_lib.c do all checks using only the position in the ring buffer. Unfortunately, where the interrupts gets delayed or merged into one, we need another timing source to check when the buffer size boundary overlaps to avoid the wrong updating of the ring buffer pointers. This code uses jiffies to check the right time window without any performance impact. Signed-off-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-08-18 20:16:54 +08:00
hw_base = 0;
ALSA: core: keep track of boundary wrap-around Keep track of boundary crossing when hw_ptr exceeds boundary limit and wraps-around. This will help keep track of total number of frames played/received at the kernel level Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:14 +08:00
crossed_boundary++;
}
ALSA: pcm midlevel code - add time check for double interrupt acknowledge The current code in pcm_lib.c do all checks using only the position in the ring buffer. Unfortunately, where the interrupts gets delayed or merged into one, we need another timing source to check when the buffer size boundary overlaps to avoid the wrong updating of the ring buffer pointers. This code uses jiffies to check the right time window without any performance impact. Signed-off-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-08-18 20:16:54 +08:00
new_hw_ptr = hw_base + pos;
goto __delta;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
}
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
/* new_hw_ptr might be lower than old_hw_ptr in case when */
/* pointer crosses the end of the ring buffer */
if (new_hw_ptr < old_hw_ptr) {
hw_base += runtime->buffer_size;
ALSA: core: keep track of boundary wrap-around Keep track of boundary crossing when hw_ptr exceeds boundary limit and wraps-around. This will help keep track of total number of frames played/received at the kernel level Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:14 +08:00
if (hw_base >= runtime->boundary) {
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
hw_base = 0;
ALSA: core: keep track of boundary wrap-around Keep track of boundary crossing when hw_ptr exceeds boundary limit and wraps-around. This will help keep track of total number of frames played/received at the kernel level Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:14 +08:00
crossed_boundary++;
}
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
new_hw_ptr = hw_base + pos;
}
__delta:
ALSA: pcm: fix delta calculation at boundary wraparound In the cleanup of the hw_ptr update functions in 2.6.33, the calculation of the delta value was changed to use the modulo operator to protect against a negative difference due to the pointer wrapping around at the boundary. However, the ptr variables are unsigned, so a negative difference would result in the two complement's value which has no relation to the actual difference relative to the boundary; the result is typically some value near LONG_MAX-boundary. Furthermore, even if the modulo operation would be done with signed types, the result of a negative dividend could be negative. The invalid delta value is then caught by the following checks, but this means that the pointer update is ignored. To fix this, use a range check as in the other pointer calculations. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-05-25 15:01:46 +08:00
delta = new_hw_ptr - old_hw_ptr;
if (delta < 0)
delta += runtime->boundary;
ALSA: pcm: support for period wakeup disabling This patch allows to disable period interrupts which are not needed when the application relies on a system timer to wake-up and refill the ring buffer. The behavior of the driver is left unchanged, and interrupts are only disabled if the application requests this configuration. The behavior in case of underruns is slightly different, instead of being detected during the period interrupts the underruns are detected when the application calls snd_pcm_update_avail, which in turns forces a refresh of the hw pointer and shows the buffer is empty. More specifically this patch makes a lot of sense when PulseAudio relies on timer-based scheduling to access audio devices such as HDAudio or Intel SST. Disabling interrupts removes two unwanted wake-ups due to period elapsed events in low-power playback modes. It also simplifies PulseAudio voice modules used for speech calls. To quote Lennart "This patch looks very interesting and desirable. This is something have long been waiting for." Support for this in hardware drivers is optional. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@intel.com> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-11-15 17:46:23 +08:00
ALSA: pcm: detect xruns in no-period-wakeup mode When period wakeups are disabled, successive calls to the pointer update function do not have a maximum allowed distance, so xruns cannot be detected with the pointer value only. To detect xruns, compare the actually elapsed time with the time that should have theoretically elapsed since the last update. When the hardware pointer has wrapped around due to an xrun, the actually elapsed time will be too big by about hw_ptr_buffer_jiffies. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-11-18 16:43:52 +08:00
if (runtime->no_period_wakeup) {
ALSA: pcm: fix infinite loop in snd_pcm_update_hw_ptr0() When period interrupts are disabled, snd_pcm_update_hw_ptr0() compares the current time against the time estimated for the current hardware pointer to detect xruns. The somewhat fuzzy threshold in the while loop makes it possible that hdelta becomes negative; the comparison being done with unsigned types then makes the loop go through the entire 263 negative range, and, depending on the value, never reach an unsigned value that is small enough to stop the loop. Doing this with interrupts disabled results in the machine locking up. To prevent this, ensure that the loop condition uses signed types for both operands so that the comparison is correctly done. Many thanks to Kelly Anderson for debugging this. Reported-by: Nix <nix@esperi.org.uk> Reported-by: "Christopher K." <c.krooss@googlemail.com> Reported-and-tested-by: Kelly Anderson <kelly@silka.with-linux.com> Signed-off-by: Kelly Anderson <kelly@silka.with-linux.com> [cl: remove unneeded casts; use a temp variable] Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: 2.6.38 <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-04-01 17:58:25 +08:00
snd_pcm_sframes_t xrun_threshold;
ALSA: pcm: detect xruns in no-period-wakeup mode When period wakeups are disabled, successive calls to the pointer update function do not have a maximum allowed distance, so xruns cannot be detected with the pointer value only. To detect xruns, compare the actually elapsed time with the time that should have theoretically elapsed since the last update. When the hardware pointer has wrapped around due to an xrun, the actually elapsed time will be too big by about hw_ptr_buffer_jiffies. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-11-18 16:43:52 +08:00
/*
* Without regular period interrupts, we have to check
* the elapsed time to detect xruns.
*/
ALSA: core: group read of pointer, tstamp and jiffies Group read of hw_ptr, tstamp and jiffies in a sequence for better correlation. Previous code took timestamp at the end, which could introduce delays between audio time and system time. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-05-23 03:54:02 +08:00
jdelta = curr_jiffies - runtime->hw_ptr_jiffies;
ALSA: pcm: optimize xrun detection in no-period-wakeup mode Add a lightweight condition on top of the xrun checking so that we can avoid the division when the application is calling the update function often enough. Suggested-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-11-18 16:53:07 +08:00
if (jdelta < runtime->hw_ptr_buffer_jiffies / 2)
goto no_delta_check;
ALSA: pcm: detect xruns in no-period-wakeup mode When period wakeups are disabled, successive calls to the pointer update function do not have a maximum allowed distance, so xruns cannot be detected with the pointer value only. To detect xruns, compare the actually elapsed time with the time that should have theoretically elapsed since the last update. When the hardware pointer has wrapped around due to an xrun, the actually elapsed time will be too big by about hw_ptr_buffer_jiffies. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-11-18 16:43:52 +08:00
hdelta = jdelta - delta * HZ / runtime->rate;
ALSA: pcm: fix infinite loop in snd_pcm_update_hw_ptr0() When period interrupts are disabled, snd_pcm_update_hw_ptr0() compares the current time against the time estimated for the current hardware pointer to detect xruns. The somewhat fuzzy threshold in the while loop makes it possible that hdelta becomes negative; the comparison being done with unsigned types then makes the loop go through the entire 263 negative range, and, depending on the value, never reach an unsigned value that is small enough to stop the loop. Doing this with interrupts disabled results in the machine locking up. To prevent this, ensure that the loop condition uses signed types for both operands so that the comparison is correctly done. Many thanks to Kelly Anderson for debugging this. Reported-by: Nix <nix@esperi.org.uk> Reported-by: "Christopher K." <c.krooss@googlemail.com> Reported-and-tested-by: Kelly Anderson <kelly@silka.with-linux.com> Signed-off-by: Kelly Anderson <kelly@silka.with-linux.com> [cl: remove unneeded casts; use a temp variable] Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: 2.6.38 <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-04-01 17:58:25 +08:00
xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1;
while (hdelta > xrun_threshold) {
ALSA: pcm: detect xruns in no-period-wakeup mode When period wakeups are disabled, successive calls to the pointer update function do not have a maximum allowed distance, so xruns cannot be detected with the pointer value only. To detect xruns, compare the actually elapsed time with the time that should have theoretically elapsed since the last update. When the hardware pointer has wrapped around due to an xrun, the actually elapsed time will be too big by about hw_ptr_buffer_jiffies. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-11-18 16:43:52 +08:00
delta += runtime->buffer_size;
hw_base += runtime->buffer_size;
ALSA: core: keep track of boundary wrap-around Keep track of boundary crossing when hw_ptr exceeds boundary limit and wraps-around. This will help keep track of total number of frames played/received at the kernel level Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:14 +08:00
if (hw_base >= runtime->boundary) {
ALSA: pcm: detect xruns in no-period-wakeup mode When period wakeups are disabled, successive calls to the pointer update function do not have a maximum allowed distance, so xruns cannot be detected with the pointer value only. To detect xruns, compare the actually elapsed time with the time that should have theoretically elapsed since the last update. When the hardware pointer has wrapped around due to an xrun, the actually elapsed time will be too big by about hw_ptr_buffer_jiffies. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-11-18 16:43:52 +08:00
hw_base = 0;
ALSA: core: keep track of boundary wrap-around Keep track of boundary crossing when hw_ptr exceeds boundary limit and wraps-around. This will help keep track of total number of frames played/received at the kernel level Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:14 +08:00
crossed_boundary++;
}
ALSA: pcm: detect xruns in no-period-wakeup mode When period wakeups are disabled, successive calls to the pointer update function do not have a maximum allowed distance, so xruns cannot be detected with the pointer value only. To detect xruns, compare the actually elapsed time with the time that should have theoretically elapsed since the last update. When the hardware pointer has wrapped around due to an xrun, the actually elapsed time will be too big by about hw_ptr_buffer_jiffies. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-11-18 16:43:52 +08:00
new_hw_ptr = hw_base + pos;
hdelta -= runtime->hw_ptr_buffer_jiffies;
}
ALSA: pcm: support for period wakeup disabling This patch allows to disable period interrupts which are not needed when the application relies on a system timer to wake-up and refill the ring buffer. The behavior of the driver is left unchanged, and interrupts are only disabled if the application requests this configuration. The behavior in case of underruns is slightly different, instead of being detected during the period interrupts the underruns are detected when the application calls snd_pcm_update_avail, which in turns forces a refresh of the hw pointer and shows the buffer is empty. More specifically this patch makes a lot of sense when PulseAudio relies on timer-based scheduling to access audio devices such as HDAudio or Intel SST. Disabling interrupts removes two unwanted wake-ups due to period elapsed events in low-power playback modes. It also simplifies PulseAudio voice modules used for speech calls. To quote Lennart "This patch looks very interesting and desirable. This is something have long been waiting for." Support for this in hardware drivers is optional. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@intel.com> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-11-15 17:46:23 +08:00
goto no_delta_check;
ALSA: pcm: detect xruns in no-period-wakeup mode When period wakeups are disabled, successive calls to the pointer update function do not have a maximum allowed distance, so xruns cannot be detected with the pointer value only. To detect xruns, compare the actually elapsed time with the time that should have theoretically elapsed since the last update. When the hardware pointer has wrapped around due to an xrun, the actually elapsed time will be too big by about hw_ptr_buffer_jiffies. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-11-18 16:43:52 +08:00
}
ALSA: pcm: support for period wakeup disabling This patch allows to disable period interrupts which are not needed when the application relies on a system timer to wake-up and refill the ring buffer. The behavior of the driver is left unchanged, and interrupts are only disabled if the application requests this configuration. The behavior in case of underruns is slightly different, instead of being detected during the period interrupts the underruns are detected when the application calls snd_pcm_update_avail, which in turns forces a refresh of the hw pointer and shows the buffer is empty. More specifically this patch makes a lot of sense when PulseAudio relies on timer-based scheduling to access audio devices such as HDAudio or Intel SST. Disabling interrupts removes two unwanted wake-ups due to period elapsed events in low-power playback modes. It also simplifies PulseAudio voice modules used for speech calls. To quote Lennart "This patch looks very interesting and desirable. This is something have long been waiting for." Support for this in hardware drivers is optional. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@intel.com> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-11-15 17:46:23 +08:00
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
/* something must be really wrong */
ALSA: pcm_lib: fix "something must be really wrong" condition When runtime->periods == 1 or when pointer crosses end of ring buffer, the delta might be greater than buffer_size. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-08 15:43:01 +08:00
if (delta >= runtime->buffer_size + runtime->period_size) {
ALSA: pcm: Replace PCM hwptr tracking with tracepoints ALSA PCM core has a mechanism tracking the PCM hwptr updates for analyzing XRUNs. But its log is limited (up to 10) and its log output is a kernel message, which is hard to handle. In this patch, the hwptr logging is moved to the tracing infrastructure instead of its own. Not only the hwptr updates but also XRUN and hwptr errors are recorded on the trace log, so that user can see such events at the exact timing. The new "snd_pcm" entry will appear in the tracing events: # ls -F /sys/kernel/debug/tracing/events/snd_pcm enable filter hw_ptr_error/ hwptr/ xrun/ The hwptr is for the regular hwptr update events. An event trace looks like: aplay-26187 [004] d..3 4012.834761: hwptr: pcmC0D0p/sub0: POS: pos=488, old=0, base=0, period=1024, buf=16384 "POS" shows the hwptr update by the explicit position update call and "IRQ" means the hwptr update by the interrupt, i.e. snd_pcm_period_elapsed() call. The "pos" is the passed ring-buffer offset by the caller, "old" is the previous hwptr, "base" is the hwptr base position, "period" and "buf" are period- and buffer-size of the target PCM substream. (Note that the hwptr position displayed here isn't the ring-buffer offset. It increments up to the PCM position boundary.) The XRUN event appears similarly, but without "pos" field. The hwptr error events appear with the PCM identifier and its reason string, such as "Lost interrupt?". The XRUN and hwptr error reports on kernel message are still left, can be turned on/off via xrun_debug proc like before. But the bit 3, 4, 5 and 6 bits of xrun_debug proc are dropped by this patch. Also, along with the change, the message strings have been reformatted to be a bit more consistent. Last but not least, the hwptr reporting is enabled only when CONFIG_SND_PCM_XRUN_DEBUG is set. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-11-04 19:45:59 +08:00
hw_ptr_error(substream, in_interrupt, "Unexpected hw_ptr",
"(stream=%i, pos=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n",
substream->stream, (long)pos,
(long)new_hw_ptr, (long)old_hw_ptr);
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
return 0;
}
ALSA: Enable PCM hw_ptr_jiffies check only in xrun_debug mode The PCM hw_ptr jiffies check results sometimes in problems when a hardware doesn't give smooth hw_ptr updates. So far, au88x0 and some other drivers appear not working due to this strict check. However, this check is a nice debug tool, and the capability should be still kept. Hence, we disable this check now as default unless the user enables it by setting the xrun_debug mode to the specific stream via a proc file. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-05-27 16:53:33 +08:00
/* Do jiffies check only in xrun_debug mode */
ALSA: pcm_lib.c - convert second xrun_debug() parameter to use defines To increase code readability, convert send xrun_debug() argument to use defines. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2009-12-18 00:34:39 +08:00
if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK))
ALSA: Enable PCM hw_ptr_jiffies check only in xrun_debug mode The PCM hw_ptr jiffies check results sometimes in problems when a hardware doesn't give smooth hw_ptr updates. So far, au88x0 and some other drivers appear not working due to this strict check. However, this check is a nice debug tool, and the capability should be still kept. Hence, we disable this check now as default unless the user enables it by setting the xrun_debug mode to the specific stream via a proc file. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-05-27 16:53:33 +08:00
goto no_jiffies_check;
ALSA: pcm core - Avoid jiffies check for devices with BATCH flag The hardware devices with SNDRV_PCM_INFO_BATCH flag can't give the precise current position. And such hardwares have often big FIFO in addition to the ring buffer, and it screws up the jiffies check in pcm_lib.c. This patch adds a simple check of info flag so that the driver skips the jiffies check in snd_pcm_period_elapsed() when BATCH flag is set. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-28 18:07:08 +08:00
/* Skip the jiffies check for hardwares with BATCH flag.
* Such hardware usually just increases the position at each IRQ,
* thus it can't give any strange position.
*/
if (runtime->hw.info & SNDRV_PCM_INFO_BATCH)
goto no_jiffies_check;
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
hdelta = delta;
ALSA: PCM midlevel: lower jiffies check margin using runtime->delay value When hardware has large FIFO, it is necessary to lower jiffies margin by count of queued samples. Signed-off-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-05-28 18:31:56 +08:00
if (hdelta < runtime->delay)
goto no_jiffies_check;
hdelta -= runtime->delay;
ALSA: core: group read of pointer, tstamp and jiffies Group read of hw_ptr, tstamp and jiffies in a sequence for better correlation. Previous code took timestamp at the end, which could introduce delays between audio time and system time. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-05-23 03:54:02 +08:00
jdelta = curr_jiffies - runtime->hw_ptr_jiffies;
[ALSA] pcm-midlevel: Add more strict buffer position checks based on jiffies Some drivers like Intel8x0 or Intel HDA are broken for some hardware variants. This patch adds more strict buffer position checks based on jiffies when internal hw_ptr is updated. Enable xrun_debug to see mangling of wrong positions. As a side effect, the hw_ptr interrupt update routine might do slightly better job when many interrupts are lost. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2009-04-10 18:28:58 +08:00
if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) {
delta = jdelta /
(((runtime->period_size * HZ) / runtime->rate)
+ HZ/100);
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
/* move new_hw_ptr according jiffies not pos variable */
new_hw_ptr = old_hw_ptr;
ALSA: pcm_lib - fix wrong delta print for jiffies check The previous jiffies delta was 0 in all cases. Use hw_ptr variable to store and print original value. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-13 15:12:31 +08:00
hw_base = delta;
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
/* use loop to avoid checks for delta overflows */
/* the delta value is small or zero in most cases */
while (delta > 0) {
new_hw_ptr += runtime->period_size;
ALSA: core: keep track of boundary wrap-around Keep track of boundary crossing when hw_ptr exceeds boundary limit and wraps-around. This will help keep track of total number of frames played/received at the kernel level Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:14 +08:00
if (new_hw_ptr >= runtime->boundary) {
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
new_hw_ptr -= runtime->boundary;
ALSA: core: keep track of boundary wrap-around Keep track of boundary crossing when hw_ptr exceeds boundary limit and wraps-around. This will help keep track of total number of frames played/received at the kernel level Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:14 +08:00
crossed_boundary--;
}
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
delta--;
}
/* align hw_base to buffer_size */
ALSA: pcm: Replace PCM hwptr tracking with tracepoints ALSA PCM core has a mechanism tracking the PCM hwptr updates for analyzing XRUNs. But its log is limited (up to 10) and its log output is a kernel message, which is hard to handle. In this patch, the hwptr logging is moved to the tracing infrastructure instead of its own. Not only the hwptr updates but also XRUN and hwptr errors are recorded on the trace log, so that user can see such events at the exact timing. The new "snd_pcm" entry will appear in the tracing events: # ls -F /sys/kernel/debug/tracing/events/snd_pcm enable filter hw_ptr_error/ hwptr/ xrun/ The hwptr is for the regular hwptr update events. An event trace looks like: aplay-26187 [004] d..3 4012.834761: hwptr: pcmC0D0p/sub0: POS: pos=488, old=0, base=0, period=1024, buf=16384 "POS" shows the hwptr update by the explicit position update call and "IRQ" means the hwptr update by the interrupt, i.e. snd_pcm_period_elapsed() call. The "pos" is the passed ring-buffer offset by the caller, "old" is the previous hwptr, "base" is the hwptr base position, "period" and "buf" are period- and buffer-size of the target PCM substream. (Note that the hwptr position displayed here isn't the ring-buffer offset. It increments up to the PCM position boundary.) The XRUN event appears similarly, but without "pos" field. The hwptr error events appear with the PCM identifier and its reason string, such as "Lost interrupt?". The XRUN and hwptr error reports on kernel message are still left, can be turned on/off via xrun_debug proc like before. But the bit 3, 4, 5 and 6 bits of xrun_debug proc are dropped by this patch. Also, along with the change, the message strings have been reformatted to be a bit more consistent. Last but not least, the hwptr reporting is enabled only when CONFIG_SND_PCM_XRUN_DEBUG is set. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-11-04 19:45:59 +08:00
hw_ptr_error(substream, in_interrupt, "hw_ptr skipping",
"(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n",
[ALSA] pcm-midlevel: Add more strict buffer position checks based on jiffies Some drivers like Intel8x0 or Intel HDA are broken for some hardware variants. This patch adds more strict buffer position checks based on jiffies when internal hw_ptr is updated. Enable xrun_debug to see mangling of wrong positions. As a side effect, the hw_ptr interrupt update routine might do slightly better job when many interrupts are lost. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2009-04-10 18:28:58 +08:00
(long)pos, (long)hdelta,
(long)runtime->period_size, jdelta,
ALSA: pcm_lib - fix wrong delta print for jiffies check The previous jiffies delta was 0 in all cases. Use hw_ptr variable to store and print original value. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-13 15:12:31 +08:00
((hdelta * HZ) / runtime->rate), hw_base,
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
(unsigned long)old_hw_ptr,
(unsigned long)new_hw_ptr);
ALSA: pcm_lib - fix wrong delta print for jiffies check The previous jiffies delta was 0 in all cases. Use hw_ptr variable to store and print original value. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-13 15:12:31 +08:00
/* reset values to proper state */
delta = 0;
hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size);
[ALSA] pcm-midlevel: Add more strict buffer position checks based on jiffies Some drivers like Intel8x0 or Intel HDA are broken for some hardware variants. This patch adds more strict buffer position checks based on jiffies when internal hw_ptr is updated. Enable xrun_debug to see mangling of wrong positions. As a side effect, the hw_ptr interrupt update routine might do slightly better job when many interrupts are lost. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2009-04-10 18:28:58 +08:00
}
ALSA: pcm core - Avoid jiffies check for devices with BATCH flag The hardware devices with SNDRV_PCM_INFO_BATCH flag can't give the precise current position. And such hardwares have often big FIFO in addition to the ring buffer, and it screws up the jiffies check in pcm_lib.c. This patch adds a simple check of info flag so that the driver skips the jiffies check in snd_pcm_period_elapsed() when BATCH flag is set. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-28 18:07:08 +08:00
no_jiffies_check:
[ALSA] pcm-midlevel: Add more strict buffer position checks based on jiffies Some drivers like Intel8x0 or Intel HDA are broken for some hardware variants. This patch adds more strict buffer position checks based on jiffies when internal hw_ptr is updated. Enable xrun_debug to see mangling of wrong positions. As a side effect, the hw_ptr interrupt update routine might do slightly better job when many interrupts are lost. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2009-04-10 18:28:58 +08:00
if (delta > runtime->period_size + runtime->period_size / 2) {
ALSA: pcm: Replace PCM hwptr tracking with tracepoints ALSA PCM core has a mechanism tracking the PCM hwptr updates for analyzing XRUNs. But its log is limited (up to 10) and its log output is a kernel message, which is hard to handle. In this patch, the hwptr logging is moved to the tracing infrastructure instead of its own. Not only the hwptr updates but also XRUN and hwptr errors are recorded on the trace log, so that user can see such events at the exact timing. The new "snd_pcm" entry will appear in the tracing events: # ls -F /sys/kernel/debug/tracing/events/snd_pcm enable filter hw_ptr_error/ hwptr/ xrun/ The hwptr is for the regular hwptr update events. An event trace looks like: aplay-26187 [004] d..3 4012.834761: hwptr: pcmC0D0p/sub0: POS: pos=488, old=0, base=0, period=1024, buf=16384 "POS" shows the hwptr update by the explicit position update call and "IRQ" means the hwptr update by the interrupt, i.e. snd_pcm_period_elapsed() call. The "pos" is the passed ring-buffer offset by the caller, "old" is the previous hwptr, "base" is the hwptr base position, "period" and "buf" are period- and buffer-size of the target PCM substream. (Note that the hwptr position displayed here isn't the ring-buffer offset. It increments up to the PCM position boundary.) The XRUN event appears similarly, but without "pos" field. The hwptr error events appear with the PCM identifier and its reason string, such as "Lost interrupt?". The XRUN and hwptr error reports on kernel message are still left, can be turned on/off via xrun_debug proc like before. But the bit 3, 4, 5 and 6 bits of xrun_debug proc are dropped by this patch. Also, along with the change, the message strings have been reformatted to be a bit more consistent. Last but not least, the hwptr reporting is enabled only when CONFIG_SND_PCM_XRUN_DEBUG is set. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-11-04 19:45:59 +08:00
hw_ptr_error(substream, in_interrupt,
"Lost interrupts?",
"(stream=%i, delta=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n",
ALSA: Rewrite hw_ptr updaters Clean up and improve snd_pcm_update_hw_ptr*() functions. snd_pcm_update_hw_ptr() tries to detect the unexpected hwptr jumps more strictly to avoid the position mess-up, which often results in the bad quality I/O with pulseaudio. The hw-ptr skip error messages are printed when xrun proc is set to non-zero. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-03-04 00:00:15 +08:00
substream->stream, (long)delta,
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
(long)new_hw_ptr,
(long)old_hw_ptr);
ALSA: Rewrite hw_ptr updaters Clean up and improve snd_pcm_update_hw_ptr*() functions. snd_pcm_update_hw_ptr() tries to detect the unexpected hwptr jumps more strictly to avoid the position mess-up, which often results in the bad quality I/O with pulseaudio. The hw-ptr skip error messages are printed when xrun proc is set to non-zero. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-03-04 00:00:15 +08:00
}
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
ALSA: pcm: support for period wakeup disabling This patch allows to disable period interrupts which are not needed when the application relies on a system timer to wake-up and refill the ring buffer. The behavior of the driver is left unchanged, and interrupts are only disabled if the application requests this configuration. The behavior in case of underruns is slightly different, instead of being detected during the period interrupts the underruns are detected when the application calls snd_pcm_update_avail, which in turns forces a refresh of the hw pointer and shows the buffer is empty. More specifically this patch makes a lot of sense when PulseAudio relies on timer-based scheduling to access audio devices such as HDAudio or Intel SST. Disabling interrupts removes two unwanted wake-ups due to period elapsed events in low-power playback modes. It also simplifies PulseAudio voice modules used for speech calls. To quote Lennart "This patch looks very interesting and desirable. This is something have long been waiting for." Support for this in hardware drivers is optional. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@intel.com> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-11-15 17:46:23 +08:00
no_delta_check:
ALSA: core: add .get_time_info Introduce more generic .get_time_info to retrieve system timestamp and audio timestamp in single routine. Backwards compatibility is preserved with same functionality as with .wall_clock method (to be removed in following commits to avoid breaking git bisect) Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-14 05:14:06 +08:00
if (runtime->status->hw_ptr == new_hw_ptr) {
update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp);
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
return 0;
ALSA: core: add .get_time_info Introduce more generic .get_time_info to retrieve system timestamp and audio timestamp in single routine. Backwards compatibility is preserved with same functionality as with .wall_clock method (to be removed in following commits to avoid breaking git bisect) Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-14 05:14:06 +08:00
}
ALSA: pcm - Fix update of runtime->hw_ptr_interrupt The commit 13f040f9e55d41e92e485389123654971e03b819 made another regression, the missing update of runtime->hw_ptr_interrupt. Since this field is only checked in snd_pcmupdate__hw_ptr_interrupt(), not in snd_pcm_update_hw_ptr(), it must be updated before the hw_ptr change check. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-06-07 18:09:17 +08:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
runtime->silence_size > 0)
snd_pcm_playback_silence(substream, new_hw_ptr);
ALSA: pcm_lib - return back hw_ptr_interrupt Clemens Ladisch noted for hw_ptr_removal in "cleanup & merge hw_ptr update functions" commit: "It is possible for the status/delay ioctls to be called when the sound card's pointer register alreay shows a position at the beginning of the new period, but immediately before the interrupt is actually executed. (This happens regularly on a SMP machine with mplayer.) When that happens, the code thinks that the position must be at least one period ahead of the current position and drops an entire buffer of data." Return back the hw_ptr_interrupt variable. The last interrupt pointer is always computed from the latest hw_ptr instead of tracking it separately (in this case all hw_ptr checks and modifications might influence also hw_ptr_interrupt and it is difficult to keep it consistent). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-27 00:08:24 +08:00
if (in_interrupt) {
ALSA: pcm: fix the fix of the runtime->boundary calculation Commit 7910b4a1db63fefc3d291853d33c34c5b6352e8e in 2.6.34 changed the runtime->boundary calculation to make this value a multiple of both the buffer_size and the period_size, because the latter is assumed by the runtime->hw_ptr_interrupt calculation. However, due to the lack of a ioctl that could read the software parameters before they are set, the kernel requires that alsa-lib calculates the boundary value, too. The changed algorithm leads to a different boundary value used by alsa-lib, which makes, e.g., mplayer fail to play a 44.1 kHz file because the silence_size parameter is now invalid; bug report: <https://bugtrack.alsa-project.org/alsa-bug/view.php?id=5015>. This patch reverts the change to the boundary calculation, and instead fixes the hw_ptr_interrupt calculation to be period-aligned regardless of the boundary value. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-05-21 15:15:59 +08:00
delta = new_hw_ptr - runtime->hw_ptr_interrupt;
if (delta < 0)
delta += runtime->boundary;
delta -= (snd_pcm_uframes_t)delta % runtime->period_size;
runtime->hw_ptr_interrupt += delta;
if (runtime->hw_ptr_interrupt >= runtime->boundary)
runtime->hw_ptr_interrupt -= runtime->boundary;
ALSA: pcm_lib - return back hw_ptr_interrupt Clemens Ladisch noted for hw_ptr_removal in "cleanup & merge hw_ptr update functions" commit: "It is possible for the status/delay ioctls to be called when the sound card's pointer register alreay shows a position at the beginning of the new period, but immediately before the interrupt is actually executed. (This happens regularly on a SMP machine with mplayer.) When that happens, the code thinks that the position must be at least one period ahead of the current position and drops an entire buffer of data." Return back the hw_ptr_interrupt variable. The last interrupt pointer is always computed from the latest hw_ptr instead of tracking it separately (in this case all hw_ptr checks and modifications might influence also hw_ptr_interrupt and it is difficult to keep it consistent). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-27 00:08:24 +08:00
}
ALSA: Rewrite hw_ptr updaters Clean up and improve snd_pcm_update_hw_ptr*() functions. snd_pcm_update_hw_ptr() tries to detect the unexpected hwptr jumps more strictly to avoid the position mess-up, which often results in the bad quality I/O with pulseaudio. The hw-ptr skip error messages are printed when xrun proc is set to non-zero. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-03-04 00:00:15 +08:00
runtime->hw_ptr_base = hw_base;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
runtime->status->hw_ptr = new_hw_ptr;
ALSA: core: group read of pointer, tstamp and jiffies Group read of hw_ptr, tstamp and jiffies in a sequence for better correlation. Previous code took timestamp at the end, which could introduce delays between audio time and system time. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-05-23 03:54:02 +08:00
runtime->hw_ptr_jiffies = curr_jiffies;
ALSA: core: keep track of boundary wrap-around Keep track of boundary crossing when hw_ptr exceeds boundary limit and wraps-around. This will help keep track of total number of frames played/received at the kernel level Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:14 +08:00
if (crossed_boundary) {
snd_BUG_ON(crossed_boundary != 1);
runtime->hw_ptr_wrap += runtime->boundary;
}
ALSA: core: add hooks for audio timestamps ALSA did not provide any direct means to infer the audio time for A/V sync and system/audio time correlations (eg. PulseAudio). Applications had to track the number of samples read/written and add/subtract the number of samples queued in the ring buffer. This accounting led to small errors, typically several samples, due to the two-step process. Computing the audio time in the kernel is more direct, as all the information is available in the same routines. Also add new .audio_wallclock routine to enable fine-grain synchronization between monotonic system time and audio hardware time. Using the wallclock, if supported in hardware, allows for a much better sub-microsecond precision and a common drift tracking for all devices sharing the same wall clock (master clock). Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:15 +08:00
ALSA: core: add .get_time_info Introduce more generic .get_time_info to retrieve system timestamp and audio timestamp in single routine. Backwards compatibility is preserved with same functionality as with .wall_clock method (to be removed in following commits to avoid breaking git bisect) Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-14 05:14:06 +08:00
update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp);
ALSA: core: add hooks for audio timestamps ALSA did not provide any direct means to infer the audio time for A/V sync and system/audio time correlations (eg. PulseAudio). Applications had to track the number of samples read/written and add/subtract the number of samples queued in the ring buffer. This accounting led to small errors, typically several samples, due to the two-step process. Computing the audio time in the kernel is more direct, as all the information is available in the same routines. Also add new .audio_wallclock routine to enable fine-grain synchronization between monotonic system time and audio hardware time. Using the wallclock, if supported in hardware, allows for a much better sub-microsecond precision and a common drift tracking for all devices sharing the same wall clock (master clock). Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:15 +08:00
ALSA: pcm_lib - optimize wake_up() calls for PCM I/O As noted by pl bossart <bossart.nospam@gmail.com>, the PCM I/O routines (snd_pcm_lib_write1, snd_pcm_lib_read1) should block wake_up() calls until all samples are not processed. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-07 22:36:31 +08:00
return snd_pcm_update_state(substream, runtime);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
/* CAUTION: call it with irq disabled */
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
return snd_pcm_update_hw_ptr0(substream, 0);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
/**
* snd_pcm_set_ops - set the PCM operators
* @pcm: the pcm instance
* @direction: stream direction, SNDRV_PCM_STREAM_XXX
* @ops: the operator table
*
* Sets the given PCM operators to the pcm instance.
*/
ALSA: Constify the snd_pcm_substream struct ops field The ops field of the snd_pcm_substream struct is never modified inside the ALSA core. Making it const allows drivers to declare their snd_pcm_ops struct as const. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-05-24 21:18:10 +08:00
void snd_pcm_set_ops(struct snd_pcm *pcm, int direction,
const struct snd_pcm_ops *ops)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_str *stream = &pcm->streams[direction];
struct snd_pcm_substream *substream;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
for (substream = stream->substream; substream != NULL; substream = substream->next)
substream->ops = ops;
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_pcm_set_ops);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/**
* snd_pcm_sync - set the PCM sync id
* @substream: the pcm substream
*
* Sets the PCM sync identifier for the card.
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
void snd_pcm_set_sync(struct snd_pcm_substream *substream)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_runtime *runtime = substream->runtime;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
runtime->sync.id32[0] = substream->pcm->card->number;
runtime->sync.id32[1] = -1;
runtime->sync.id32[2] = -1;
runtime->sync.id32[3] = -1;
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_pcm_set_sync);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* Standard ioctl routine
*/
static inline unsigned int div32(unsigned int a, unsigned int b,
unsigned int *r)
{
if (b == 0) {
*r = 0;
return UINT_MAX;
}
*r = a % b;
return a / b;
}
static inline unsigned int div_down(unsigned int a, unsigned int b)
{
if (b == 0)
return UINT_MAX;
return a / b;
}
static inline unsigned int div_up(unsigned int a, unsigned int b)
{
unsigned int r;
unsigned int q;
if (b == 0)
return UINT_MAX;
q = div32(a, b, &r);
if (r)
++q;
return q;
}
static inline unsigned int mul(unsigned int a, unsigned int b)
{
if (a == 0)
return 0;
if (div_down(UINT_MAX, a) < b)
return UINT_MAX;
return a * b;
}
static inline unsigned int muldiv32(unsigned int a, unsigned int b,
unsigned int c, unsigned int *r)
{
u_int64_t n = (u_int64_t) a * b;
if (c == 0) {
ALSA: Kill snd_assert() in sound/core/* Kill snd_assert() in sound/core/*, either removed or replaced with if () with snd_BUG_ON(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-08-08 23:09:09 +08:00
snd_BUG_ON(!n);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*r = 0;
return UINT_MAX;
}
ALSA: Clean up 64bit division functions Replace the house-made div64_32() with the standard div_u64*() functions. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-06-05 23:40:04 +08:00
n = div_u64_rem(n, c, r);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (n >= UINT_MAX) {
*r = 0;
return UINT_MAX;
}
return n;
}
/**
* snd_interval_refine - refine the interval value of configurator
* @i: the interval value to refine
* @v: the interval value to refer to
*
* Refines the interval value with the reference value.
* The interval is changed to the range satisfying both intervals.
* The interval status (min, max, integer, etc.) are evaluated.
*
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
* Return: Positive if the value is changed, zero if it's not changed, or a
* negative error code.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
int changed = 0;
ALSA: Kill snd_assert() in sound/core/* Kill snd_assert() in sound/core/*, either removed or replaced with if () with snd_BUG_ON(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-08-08 23:09:09 +08:00
if (snd_BUG_ON(snd_interval_empty(i)))
return -EINVAL;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (i->min < v->min) {
i->min = v->min;
i->openmin = v->openmin;
changed = 1;
} else if (i->min == v->min && !i->openmin && v->openmin) {
i->openmin = 1;
changed = 1;
}
if (i->max > v->max) {
i->max = v->max;
i->openmax = v->openmax;
changed = 1;
} else if (i->max == v->max && !i->openmax && v->openmax) {
i->openmax = 1;
changed = 1;
}
if (!i->integer && v->integer) {
i->integer = 1;
changed = 1;
}
if (i->integer) {
if (i->openmin) {
i->min++;
i->openmin = 0;
}
if (i->openmax) {
i->max--;
i->openmax = 0;
}
} else if (!i->openmin && !i->openmax && i->min == i->max)
i->integer = 1;
if (snd_interval_checkempty(i)) {
snd_interval_none(i);
return -EINVAL;
}
return changed;
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_interval_refine);
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
static int snd_interval_refine_first(struct snd_interval *i)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
ALSA: Kill snd_assert() in sound/core/* Kill snd_assert() in sound/core/*, either removed or replaced with if () with snd_BUG_ON(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-08-08 23:09:09 +08:00
if (snd_BUG_ON(snd_interval_empty(i)))
return -EINVAL;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (snd_interval_single(i))
return 0;
i->max = i->min;
i->openmax = i->openmin;
if (i->openmax)
i->max++;
return 1;
}
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
static int snd_interval_refine_last(struct snd_interval *i)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
ALSA: Kill snd_assert() in sound/core/* Kill snd_assert() in sound/core/*, either removed or replaced with if () with snd_BUG_ON(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-08-08 23:09:09 +08:00
if (snd_BUG_ON(snd_interval_empty(i)))
return -EINVAL;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (snd_interval_single(i))
return 0;
i->min = i->max;
i->openmin = i->openmax;
if (i->openmin)
i->min--;
return 1;
}
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
if (a->empty || b->empty) {
snd_interval_none(c);
return;
}
c->empty = 0;
c->min = mul(a->min, b->min);
c->openmin = (a->openmin || b->openmin);
c->max = mul(a->max, b->max);
c->openmax = (a->openmax || b->openmax);
c->integer = (a->integer && b->integer);
}
/**
* snd_interval_div - refine the interval value with division
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @a: dividend
* @b: divisor
* @c: quotient
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*
* c = a / b
*
* Returns non-zero if the value is changed, zero if not changed.
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
unsigned int r;
if (a->empty || b->empty) {
snd_interval_none(c);
return;
}
c->empty = 0;
c->min = div32(a->min, b->max, &r);
c->openmin = (r || a->openmin || b->openmax);
if (b->min > 0) {
c->max = div32(a->max, b->min, &r);
if (r) {
c->max++;
c->openmax = 1;
} else
c->openmax = (a->openmax || b->openmin);
} else {
c->max = UINT_MAX;
c->openmax = 0;
}
c->integer = 0;
}
/**
* snd_interval_muldivk - refine the interval value
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @a: dividend 1
* @b: dividend 2
* @k: divisor (as integer)
* @c: result
*
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
* c = a * b / k
*
* Returns non-zero if the value is changed, zero if not changed.
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b,
unsigned int k, struct snd_interval *c)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
unsigned int r;
if (a->empty || b->empty) {
snd_interval_none(c);
return;
}
c->empty = 0;
c->min = muldiv32(a->min, b->min, k, &r);
c->openmin = (r || a->openmin || b->openmin);
c->max = muldiv32(a->max, b->max, k, &r);
if (r) {
c->max++;
c->openmax = 1;
} else
c->openmax = (a->openmax || b->openmax);
c->integer = 0;
}
/**
* snd_interval_mulkdiv - refine the interval value
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @a: dividend 1
* @k: dividend 2 (as integer)
* @b: divisor
* @c: result
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*
* c = a * k / b
*
* Returns non-zero if the value is changed, zero if not changed.
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
const struct snd_interval *b, struct snd_interval *c)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
unsigned int r;
if (a->empty || b->empty) {
snd_interval_none(c);
return;
}
c->empty = 0;
c->min = muldiv32(a->min, k, b->max, &r);
c->openmin = (r || a->openmin || b->openmax);
if (b->min > 0) {
c->max = muldiv32(a->max, k, b->min, &r);
if (r) {
c->max++;
c->openmax = 1;
} else
c->openmax = (a->openmax || b->openmin);
} else {
c->max = UINT_MAX;
c->openmax = 0;
}
c->integer = 0;
}
/* ---- */
/**
* snd_interval_ratnum - refine the interval value
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @i: interval to refine
* @rats_count: number of ratnum_t
* @rats: ratnum_t array
* @nump: pointer to store the resultant numerator
* @denp: pointer to store the resultant denominator
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
* Return: Positive if the value is changed, zero if it's not changed, or a
* negative error code.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
int snd_interval_ratnum(struct snd_interval *i,
ALSA: Constify ratden/ratnum constraints The ALSA core does not modify the constraints provided by a driver. Most constraint helper functions already take a const pointer to the constraint description, the exception at the moment being the ratden and ratnum constraints. Make those const as well, this allows a driver to declare them as const. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-10-28 18:37:53 +08:00
unsigned int rats_count, const struct snd_ratnum *rats,
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
unsigned int *nump, unsigned int *denp)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
ALSA: refine rate selection in snd_interval_ratnum() Refine the rate selection by choosing the rate closer to the requested one in case of selecting single frequency. Previously, the higher rate was always selected. Also, fix problem with the best_diff unsigned int value wrapping (turning negative). Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-22 00:07:08 +08:00
unsigned int best_num, best_den;
int best_diff;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned int k;
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_interval t;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
int err;
ALSA: refine rate selection in snd_interval_ratnum() Refine the rate selection by choosing the rate closer to the requested one in case of selecting single frequency. Previously, the higher rate was always selected. Also, fix problem with the best_diff unsigned int value wrapping (turning negative). Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-22 00:07:08 +08:00
unsigned int result_num, result_den;
int result_diff;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
best_num = best_den = best_diff = 0;
for (k = 0; k < rats_count; ++k) {
unsigned int num = rats[k].num;
unsigned int den;
unsigned int q = i->min;
int diff;
if (q == 0)
q = 1;
ALSA: fix incorrect rounding direction in snd_interval_ratnum() The direction of rounding is incorrect in the snd_interval_ratnum() It was detected with following parameters (sb8 driver playing 8kHz stereo file): - num is always 1000000 - requested frequency rate is from 7999 to 7999 (single frequency) The first loop calculates div_down(num, freq->min) which is 125. Thus, a frequency range's minimum value is 1000000 / 125 = 8000 Hz. The second loop calculates div_up(num, freq->max) which is 126 The frequency range's maximum value is 1000000 / 126 = 7936 Hz. The range maximum is lower than the range minimum so the function fails due to empty result range. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-20 01:31:04 +08:00
den = div_up(num, q);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (den < rats[k].den_min)
continue;
if (den > rats[k].den_max)
den = rats[k].den_max;
else {
unsigned int r;
r = (den - rats[k].den_min) % rats[k].den_step;
if (r != 0)
den -= r;
}
diff = num - q * den;
ALSA: refine rate selection in snd_interval_ratnum() Refine the rate selection by choosing the rate closer to the requested one in case of selecting single frequency. Previously, the higher rate was always selected. Also, fix problem with the best_diff unsigned int value wrapping (turning negative). Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-22 00:07:08 +08:00
if (diff < 0)
diff = -diff;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (best_num == 0 ||
diff * best_den < best_diff * den) {
best_diff = diff;
best_den = den;
best_num = num;
}
}
if (best_den == 0) {
i->empty = 1;
return -EINVAL;
}
t.min = div_down(best_num, best_den);
t.openmin = !!(best_num % best_den);
ALSA: refine rate selection in snd_interval_ratnum() Refine the rate selection by choosing the rate closer to the requested one in case of selecting single frequency. Previously, the higher rate was always selected. Also, fix problem with the best_diff unsigned int value wrapping (turning negative). Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-22 00:07:08 +08:00
result_num = best_num;
result_diff = best_diff;
result_den = best_den;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
best_num = best_den = best_diff = 0;
for (k = 0; k < rats_count; ++k) {
unsigned int num = rats[k].num;
unsigned int den;
unsigned int q = i->max;
int diff;
if (q == 0) {
i->empty = 1;
return -EINVAL;
}
ALSA: fix incorrect rounding direction in snd_interval_ratnum() The direction of rounding is incorrect in the snd_interval_ratnum() It was detected with following parameters (sb8 driver playing 8kHz stereo file): - num is always 1000000 - requested frequency rate is from 7999 to 7999 (single frequency) The first loop calculates div_down(num, freq->min) which is 125. Thus, a frequency range's minimum value is 1000000 / 125 = 8000 Hz. The second loop calculates div_up(num, freq->max) which is 126 The frequency range's maximum value is 1000000 / 126 = 7936 Hz. The range maximum is lower than the range minimum so the function fails due to empty result range. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-20 01:31:04 +08:00
den = div_down(num, q);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (den > rats[k].den_max)
continue;
if (den < rats[k].den_min)
den = rats[k].den_min;
else {
unsigned int r;
r = (den - rats[k].den_min) % rats[k].den_step;
if (r != 0)
den += rats[k].den_step - r;
}
diff = q * den - num;
ALSA: refine rate selection in snd_interval_ratnum() Refine the rate selection by choosing the rate closer to the requested one in case of selecting single frequency. Previously, the higher rate was always selected. Also, fix problem with the best_diff unsigned int value wrapping (turning negative). Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-22 00:07:08 +08:00
if (diff < 0)
diff = -diff;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (best_num == 0 ||
diff * best_den < best_diff * den) {
best_diff = diff;
best_den = den;
best_num = num;
}
}
if (best_den == 0) {
i->empty = 1;
return -EINVAL;
}
t.max = div_up(best_num, best_den);
t.openmax = !!(best_num % best_den);
t.integer = 0;
err = snd_interval_refine(i, &t);
if (err < 0)
return err;
if (snd_interval_single(i)) {
ALSA: refine rate selection in snd_interval_ratnum() Refine the rate selection by choosing the rate closer to the requested one in case of selecting single frequency. Previously, the higher rate was always selected. Also, fix problem with the best_diff unsigned int value wrapping (turning negative). Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-22 00:07:08 +08:00
if (best_diff * result_den < result_diff * best_den) {
result_num = best_num;
result_den = best_den;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (nump)
ALSA: refine rate selection in snd_interval_ratnum() Refine the rate selection by choosing the rate closer to the requested one in case of selecting single frequency. Previously, the higher rate was always selected. Also, fix problem with the best_diff unsigned int value wrapping (turning negative). Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-22 00:07:08 +08:00
*nump = result_num;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (denp)
ALSA: refine rate selection in snd_interval_ratnum() Refine the rate selection by choosing the rate closer to the requested one in case of selecting single frequency. Previously, the higher rate was always selected. Also, fix problem with the best_diff unsigned int value wrapping (turning negative). Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-12-22 00:07:08 +08:00
*denp = result_den;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
return err;
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_interval_ratnum);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/**
* snd_interval_ratden - refine the interval value
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @i: interval to refine
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
* @rats_count: number of struct ratden
* @rats: struct ratden array
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @nump: pointer to store the resultant numerator
* @denp: pointer to store the resultant denominator
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
* Return: Positive if the value is changed, zero if it's not changed, or a
* negative error code.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
static int snd_interval_ratden(struct snd_interval *i,
ALSA: Constify ratden/ratnum constraints The ALSA core does not modify the constraints provided by a driver. Most constraint helper functions already take a const pointer to the constraint description, the exception at the moment being the ratden and ratnum constraints. Make those const as well, this allows a driver to declare them as const. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-10-28 18:37:53 +08:00
unsigned int rats_count,
const struct snd_ratden *rats,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned int *nump, unsigned int *denp)
{
unsigned int best_num, best_diff, best_den;
unsigned int k;
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_interval t;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
int err;
best_num = best_den = best_diff = 0;
for (k = 0; k < rats_count; ++k) {
unsigned int num;
unsigned int den = rats[k].den;
unsigned int q = i->min;
int diff;
num = mul(q, den);
if (num > rats[k].num_max)
continue;
if (num < rats[k].num_min)
num = rats[k].num_max;
else {
unsigned int r;
r = (num - rats[k].num_min) % rats[k].num_step;
if (r != 0)
num += rats[k].num_step - r;
}
diff = num - q * den;
if (best_num == 0 ||
diff * best_den < best_diff * den) {
best_diff = diff;
best_den = den;
best_num = num;
}
}
if (best_den == 0) {
i->empty = 1;
return -EINVAL;
}
t.min = div_down(best_num, best_den);
t.openmin = !!(best_num % best_den);
best_num = best_den = best_diff = 0;
for (k = 0; k < rats_count; ++k) {
unsigned int num;
unsigned int den = rats[k].den;
unsigned int q = i->max;
int diff;
num = mul(q, den);
if (num < rats[k].num_min)
continue;
if (num > rats[k].num_max)
num = rats[k].num_max;
else {
unsigned int r;
r = (num - rats[k].num_min) % rats[k].num_step;
if (r != 0)
num -= r;
}
diff = q * den - num;
if (best_num == 0 ||
diff * best_den < best_diff * den) {
best_diff = diff;
best_den = den;
best_num = num;
}
}
if (best_den == 0) {
i->empty = 1;
return -EINVAL;
}
t.max = div_up(best_num, best_den);
t.openmax = !!(best_num % best_den);
t.integer = 0;
err = snd_interval_refine(i, &t);
if (err < 0)
return err;
if (snd_interval_single(i)) {
if (nump)
*nump = best_num;
if (denp)
*denp = best_den;
}
return err;
}
/**
* snd_interval_list - refine the interval value from the list
* @i: the interval value to refine
* @count: the number of elements in the list
* @list: the value list
* @mask: the bit-mask to evaluate
*
* Refines the interval value from the list.
* When mask is non-zero, only the elements corresponding to bit 1 are
* evaluated.
*
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
* Return: Positive if the value is changed, zero if it's not changed, or a
* negative error code.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
ALSA: pcm: Constify the list in snd_pcm_hw_constraint_list Allows the constraint lists to be declared const by drivers which seems reasonable; there's plenty of other constification we could do if we were being complete but this was easy and quick. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-03-15 03:48:43 +08:00
int snd_interval_list(struct snd_interval *i, unsigned int count,
const unsigned int *list, unsigned int mask)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
unsigned int k;
sound: pcm_lib: fix unsorted list constraint handling snd_interval_list() expected a sorted list but did not document this, so there are drivers that give it an unsorted list. To fix this, change the algorithm to work with any list. This fixes the "Slave PCM not usable" error with USB devices that have multiple alternate settings with sample rates in decreasing order, such as the Philips Askey VC010 WebCam. http://bugzilla.kernel.org/show_bug.cgi?id=14028 Reported-and-tested-by: Andrzej <adkadk@gmail.com> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-08-25 14:15:41 +08:00
struct snd_interval list_range;
[ALSA] Fix possible invalid memory access in PCM core snd_internval_list() may access invalid memory in the case count = 0 is given. It shouldn't be passed, but it'd better to make the code a bit more robust. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2007-02-01 21:53:49 +08:00
if (!count) {
i->empty = 1;
return -EINVAL;
}
sound: pcm_lib: fix unsorted list constraint handling snd_interval_list() expected a sorted list but did not document this, so there are drivers that give it an unsorted list. To fix this, change the algorithm to work with any list. This fixes the "Slave PCM not usable" error with USB devices that have multiple alternate settings with sample rates in decreasing order, such as the Philips Askey VC010 WebCam. http://bugzilla.kernel.org/show_bug.cgi?id=14028 Reported-and-tested-by: Andrzej <adkadk@gmail.com> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-08-25 14:15:41 +08:00
snd_interval_any(&list_range);
list_range.min = UINT_MAX;
list_range.max = 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
for (k = 0; k < count; k++) {
if (mask && !(mask & (1 << k)))
continue;
sound: pcm_lib: fix unsorted list constraint handling snd_interval_list() expected a sorted list but did not document this, so there are drivers that give it an unsorted list. To fix this, change the algorithm to work with any list. This fixes the "Slave PCM not usable" error with USB devices that have multiple alternate settings with sample rates in decreasing order, such as the Philips Askey VC010 WebCam. http://bugzilla.kernel.org/show_bug.cgi?id=14028 Reported-and-tested-by: Andrzej <adkadk@gmail.com> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-08-25 14:15:41 +08:00
if (!snd_interval_test(i, list[k]))
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
continue;
sound: pcm_lib: fix unsorted list constraint handling snd_interval_list() expected a sorted list but did not document this, so there are drivers that give it an unsorted list. To fix this, change the algorithm to work with any list. This fixes the "Slave PCM not usable" error with USB devices that have multiple alternate settings with sample rates in decreasing order, such as the Philips Askey VC010 WebCam. http://bugzilla.kernel.org/show_bug.cgi?id=14028 Reported-and-tested-by: Andrzej <adkadk@gmail.com> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-08-25 14:15:41 +08:00
list_range.min = min(list_range.min, list[k]);
list_range.max = max(list_range.max, list[k]);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
sound: pcm_lib: fix unsorted list constraint handling snd_interval_list() expected a sorted list but did not document this, so there are drivers that give it an unsorted list. To fix this, change the algorithm to work with any list. This fixes the "Slave PCM not usable" error with USB devices that have multiple alternate settings with sample rates in decreasing order, such as the Philips Askey VC010 WebCam. http://bugzilla.kernel.org/show_bug.cgi?id=14028 Reported-and-tested-by: Andrzej <adkadk@gmail.com> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-08-25 14:15:41 +08:00
return snd_interval_refine(i, &list_range);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_interval_list);
ALSA: pcm: Add snd_interval_ranges() and snd_pcm_hw_constraint_ranges() Add helper functions to allow drivers to specify several disjoint ranges for a variable. In particular, there is a codec (PCM512x) that has a hole in its supported range of rates, due to PLL and divider restrictions. This is like snd_pcm_hw_constraint_list(), but for ranges instead of points. Signed-off-by: Peter Rosin <peda@axentia.se> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 22:16:06 +08:00
/**
* snd_interval_ranges - refine the interval value from the list of ranges
* @i: the interval value to refine
* @count: the number of elements in the list of ranges
* @ranges: the ranges list
* @mask: the bit-mask to evaluate
*
* Refines the interval value from the list of ranges.
* When mask is non-zero, only the elements corresponding to bit 1 are
* evaluated.
*
* Return: Positive if the value is changed, zero if it's not changed, or a
* negative error code.
*/
int snd_interval_ranges(struct snd_interval *i, unsigned int count,
const struct snd_interval *ranges, unsigned int mask)
{
unsigned int k;
struct snd_interval range_union;
struct snd_interval range;
if (!count) {
snd_interval_none(i);
return -EINVAL;
}
snd_interval_any(&range_union);
range_union.min = UINT_MAX;
range_union.max = 0;
for (k = 0; k < count; k++) {
if (mask && !(mask & (1 << k)))
continue;
snd_interval_copy(&range, &ranges[k]);
if (snd_interval_refine(&range, i) < 0)
continue;
if (snd_interval_empty(&range))
continue;
if (range.min < range_union.min) {
range_union.min = range.min;
range_union.openmin = 1;
}
if (range.min == range_union.min && !range.openmin)
range_union.openmin = 0;
if (range.max > range_union.max) {
range_union.max = range.max;
range_union.openmax = 1;
}
if (range.max == range_union.max && !range.openmax)
range_union.openmax = 0;
}
return snd_interval_refine(i, &range_union);
}
EXPORT_SYMBOL(snd_interval_ranges);
ALSA: pcm: snd_interval_step: drop the min parameter The min parameter was not used by any caller. And if it were used, underflows in the calculations could lead to incorrect results. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-09-08 03:43:07 +08:00
static int snd_interval_step(struct snd_interval *i, unsigned int step)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
unsigned int n;
int changed = 0;
ALSA: pcm: snd_interval_step: drop the min parameter The min parameter was not used by any caller. And if it were used, underflows in the calculations could lead to incorrect results. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-09-08 03:43:07 +08:00
n = i->min % step;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (n != 0 || i->openmin) {
i->min += step - n;
ALSA: pcm: snd_interval_step: fix changes of open intervals Changing an interval boundary to a multiple of the step size makes that boundary exact. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-09-08 03:43:41 +08:00
i->openmin = 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
changed = 1;
}
ALSA: pcm: snd_interval_step: drop the min parameter The min parameter was not used by any caller. And if it were used, underflows in the calculations could lead to incorrect results. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-09-08 03:43:07 +08:00
n = i->max % step;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (n != 0 || i->openmax) {
i->max -= n;
ALSA: pcm: snd_interval_step: fix changes of open intervals Changing an interval boundary to a multiple of the step size makes that boundary exact. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-09-08 03:43:41 +08:00
i->openmax = 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
changed = 1;
}
if (snd_interval_checkempty(i)) {
i->empty = 1;
return -EINVAL;
}
return changed;
}
/* Info constraints helpers */
/**
* snd_pcm_hw_rule_add - add the hw-constraint rule
* @runtime: the pcm runtime instance
* @cond: condition bits
* @var: the variable to evaluate
* @func: the evaluation function
* @private: the private data pointer passed to function
* @dep: the dependent variables
*
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
* Return: Zero if successful, or a negative error code on failure.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
int var,
snd_pcm_hw_rule_func_t func, void *private,
int dep, ...)
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
struct snd_pcm_hw_rule *c;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned int k;
va_list args;
va_start(args, dep);
if (constrs->rules_num >= constrs->rules_all) {
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_hw_rule *new;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned int new_rules = constrs->rules_all + 16;
new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL);
ALSA: pcm: remember to always call va_end() on stuff that we va_start() The Coverity checker spotted that we do not always remember to call va_end() on 'args' in failure paths in snd_pcm_hw_rule_add(). Here's a patch to fix that up (compile tested only) - it also removes some annoying trailing whitespace that caught my eye while I was in the area.. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-12-21 07:03:17 +08:00
if (!new) {
va_end(args);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return -ENOMEM;
ALSA: pcm: remember to always call va_end() on stuff that we va_start() The Coverity checker spotted that we do not always remember to call va_end() on 'args' in failure paths in snd_pcm_hw_rule_add(). Here's a patch to fix that up (compile tested only) - it also removes some annoying trailing whitespace that caught my eye while I was in the area.. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-12-21 07:03:17 +08:00
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (constrs->rules) {
memcpy(new, constrs->rules,
constrs->rules_num * sizeof(*c));
kfree(constrs->rules);
}
constrs->rules = new;
constrs->rules_all = new_rules;
}
c = &constrs->rules[constrs->rules_num];
c->cond = cond;
c->func = func;
c->var = var;
c->private = private;
k = 0;
while (1) {
ALSA: pcm: remember to always call va_end() on stuff that we va_start() The Coverity checker spotted that we do not always remember to call va_end() on 'args' in failure paths in snd_pcm_hw_rule_add(). Here's a patch to fix that up (compile tested only) - it also removes some annoying trailing whitespace that caught my eye while I was in the area.. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-12-21 07:03:17 +08:00
if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) {
va_end(args);
ALSA: Kill snd_assert() in sound/core/* Kill snd_assert() in sound/core/*, either removed or replaced with if () with snd_BUG_ON(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-08-08 23:09:09 +08:00
return -EINVAL;
ALSA: pcm: remember to always call va_end() on stuff that we va_start() The Coverity checker spotted that we do not always remember to call va_end() on 'args' in failure paths in snd_pcm_hw_rule_add(). Here's a patch to fix that up (compile tested only) - it also removes some annoying trailing whitespace that caught my eye while I was in the area.. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-12-21 07:03:17 +08:00
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
c->deps[k++] = dep;
if (dep < 0)
break;
dep = va_arg(args, int);
}
constrs->rules_num++;
va_end(args);
return 0;
ALSA: pcm: remember to always call va_end() on stuff that we va_start() The Coverity checker spotted that we do not always remember to call va_end() on 'args' in failure paths in snd_pcm_hw_rule_add(). Here's a patch to fix that up (compile tested only) - it also removes some annoying trailing whitespace that caught my eye while I was in the area.. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-12-21 07:03:17 +08:00
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_pcm_hw_rule_add);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/**
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @runtime: PCM runtime instance
* @var: hw_params variable to apply the mask
* @mask: the bitmap mask
*
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* Apply the constraint of the given bitmap mask to a 32-bit mask parameter.
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
*
* Return: Zero if successful, or a negative error code on failure.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
u_int32_t mask)
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
struct snd_mask *maskp = constrs_mask(constrs, var);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*maskp->bits &= mask;
memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */
if (*maskp->bits == 0)
return -EINVAL;
return 0;
}
/**
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @runtime: PCM runtime instance
* @var: hw_params variable to apply the mask
* @mask: the 64bit bitmap mask
*
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* Apply the constraint of the given bitmap mask to a 64-bit mask parameter.
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
*
* Return: Zero if successful, or a negative error code on failure.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
u_int64_t mask)
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
struct snd_mask *maskp = constrs_mask(constrs, var);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
maskp->bits[0] &= (u_int32_t)mask;
maskp->bits[1] &= (u_int32_t)(mask >> 32);
memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */
if (! maskp->bits[0] && ! maskp->bits[1])
return -EINVAL;
return 0;
}
ALSA: Export snd_pcm_constraint_mask64() Allow modules to use it, fixing a build failure when the newly added ADAU1977 driver is built as a module. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Mark Brown <broonie@linaro.org> Acked-by: Takashi Iwai <tiwai@suse.de>
2014-02-20 11:13:52 +08:00
EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/**
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* snd_pcm_hw_constraint_integer - apply an integer constraint to an interval
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @runtime: PCM runtime instance
* @var: hw_params variable to apply the integer constraint
*
* Apply the constraint of integer to an interval parameter.
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
*
* Return: Positive if the value is changed, zero if it's not changed, or a
* negative error code.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return snd_interval_setinteger(constrs_interval(constrs, var));
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_pcm_hw_constraint_integer);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/**
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @runtime: PCM runtime instance
* @var: hw_params variable to apply the range
* @min: the minimal value
* @max: the maximal value
*
* Apply the min/max range constraint to an interval parameter.
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
*
* Return: Positive if the value is changed, zero if it's not changed, or a
* negative error code.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned int min, unsigned int max)
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
struct snd_interval t;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
t.min = min;
t.max = max;
t.openmin = t.openmax = 0;
t.integer = 0;
return snd_interval_refine(constrs_interval(constrs, var), &t);
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax);
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_hw_constraint_list *list = rule->private;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask);
}
/**
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* snd_pcm_hw_constraint_list - apply a list of constraints to a parameter
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @runtime: PCM runtime instance
* @cond: condition bits
* @var: hw_params variable to apply the list constraint
* @l: list
*
* Apply the list of constraints to an interval parameter.
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
*
* Return: Zero if successful, or a negative error code on failure.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned int cond,
snd_pcm_hw_param_t var,
ALSA: pcm: Make constraints lists const They aren't modified by the core so the drivers can declare them const. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-07-05 19:15:01 +08:00
const struct snd_pcm_hw_constraint_list *l)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
return snd_pcm_hw_rule_add(runtime, cond, var,
ALSA: pcm: Make constraints lists const They aren't modified by the core so the drivers can declare them const. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-07-05 19:15:01 +08:00
snd_pcm_hw_rule_list, (void *)l,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
var, -1);
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_pcm_hw_constraint_list);
ALSA: pcm: Add snd_interval_ranges() and snd_pcm_hw_constraint_ranges() Add helper functions to allow drivers to specify several disjoint ranges for a variable. In particular, there is a codec (PCM512x) that has a hole in its supported range of rates, due to PLL and divider restrictions. This is like snd_pcm_hw_constraint_list(), but for ranges instead of points. Signed-off-by: Peter Rosin <peda@axentia.se> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 22:16:06 +08:00
static int snd_pcm_hw_rule_ranges(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
struct snd_pcm_hw_constraint_ranges *r = rule->private;
return snd_interval_ranges(hw_param_interval(params, rule->var),
r->count, r->ranges, r->mask);
}
/**
* snd_pcm_hw_constraint_ranges - apply list of range constraints to a parameter
* @runtime: PCM runtime instance
* @cond: condition bits
* @var: hw_params variable to apply the list of range constraints
* @r: ranges
*
* Apply the list of range constraints to an interval parameter.
*
* Return: Zero if successful, or a negative error code on failure.
*/
int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime,
unsigned int cond,
snd_pcm_hw_param_t var,
const struct snd_pcm_hw_constraint_ranges *r)
{
return snd_pcm_hw_rule_add(runtime, cond, var,
snd_pcm_hw_rule_ranges, (void *)r,
var, -1);
}
EXPORT_SYMBOL(snd_pcm_hw_constraint_ranges);
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
ALSA: Constify ratden/ratnum constraints The ALSA core does not modify the constraints provided by a driver. Most constraint helper functions already take a const pointer to the constraint description, the exception at the moment being the ratden and ratnum constraints. Make those const as well, this allows a driver to declare them as const. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-10-28 18:37:53 +08:00
const struct snd_pcm_hw_constraint_ratnums *r = rule->private;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned int num = 0, den = 0;
int err;
err = snd_interval_ratnum(hw_param_interval(params, rule->var),
r->nrats, r->rats, &num, &den);
if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) {
params->rate_num = num;
params->rate_den = den;
}
return err;
}
/**
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @runtime: PCM runtime instance
* @cond: condition bits
* @var: hw_params variable to apply the ratnums constraint
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
* @r: struct snd_ratnums constriants
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
*
* Return: Zero if successful, or a negative error code on failure.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned int cond,
snd_pcm_hw_param_t var,
ALSA: Constify ratden/ratnum constraints The ALSA core does not modify the constraints provided by a driver. Most constraint helper functions already take a const pointer to the constraint description, the exception at the moment being the ratden and ratnum constraints. Make those const as well, this allows a driver to declare them as const. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-10-28 18:37:53 +08:00
const struct snd_pcm_hw_constraint_ratnums *r)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
return snd_pcm_hw_rule_add(runtime, cond, var,
ALSA: Constify ratden/ratnum constraints The ALSA core does not modify the constraints provided by a driver. Most constraint helper functions already take a const pointer to the constraint description, the exception at the moment being the ratden and ratnum constraints. Make those const as well, this allows a driver to declare them as const. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-10-28 18:37:53 +08:00
snd_pcm_hw_rule_ratnums, (void *)r,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
var, -1);
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums);
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
ALSA: Constify ratden/ratnum constraints The ALSA core does not modify the constraints provided by a driver. Most constraint helper functions already take a const pointer to the constraint description, the exception at the moment being the ratden and ratnum constraints. Make those const as well, this allows a driver to declare them as const. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-10-28 18:37:53 +08:00
const struct snd_pcm_hw_constraint_ratdens *r = rule->private;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned int num = 0, den = 0;
int err = snd_interval_ratden(hw_param_interval(params, rule->var),
r->nrats, r->rats, &num, &den);
if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) {
params->rate_num = num;
params->rate_den = den;
}
return err;
}
/**
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @runtime: PCM runtime instance
* @cond: condition bits
* @var: hw_params variable to apply the ratdens constraint
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
* @r: struct snd_ratdens constriants
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
*
* Return: Zero if successful, or a negative error code on failure.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned int cond,
snd_pcm_hw_param_t var,
ALSA: Constify ratden/ratnum constraints The ALSA core does not modify the constraints provided by a driver. Most constraint helper functions already take a const pointer to the constraint description, the exception at the moment being the ratden and ratnum constraints. Make those const as well, this allows a driver to declare them as const. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-10-28 18:37:53 +08:00
const struct snd_pcm_hw_constraint_ratdens *r)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
return snd_pcm_hw_rule_add(runtime, cond, var,
ALSA: Constify ratden/ratnum constraints The ALSA core does not modify the constraints provided by a driver. Most constraint helper functions already take a const pointer to the constraint description, the exception at the moment being the ratden and ratnum constraints. Make those const as well, this allows a driver to declare them as const. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-10-28 18:37:53 +08:00
snd_pcm_hw_rule_ratdens, (void *)r,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
var, -1);
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens);
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
unsigned int l = (unsigned long) rule->private;
int width = l & 0xffff;
unsigned int msbits = l >> 16;
ALSA: pcm: use helper function to refer parameter as read-only ALSA pcm core has hw_param_interval_c() to pick up parameter with const qualifier for safe programming. This commit applies it to the cases. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-17 07:48:20 +08:00
const struct snd_interval *i =
hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
ALSA: Add support for wildcard msbits constraints Currently the msbits constraints requires to specify a specific sample format width for which the constraint should be applied. But often the number of most significant bits is not sample format specific, but rather a absolute limit. E.g. the PCM interface might accept 32-bit and 24-bit samples, but the DAC has a 16-bit resolution and throws away the LSBs. In this case for both 32-bit and 24-bit format msbits should be set to 16. This patch extends snd_pcm_hw_constraint_msbits() so that a wildcard constraint can be setup that is applied for all formats with a sample width larger than the specified msbits. Choosing the wildcard constraint is done by setting the sample width parameter of the function to 0. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-12-30 01:43:37 +08:00
if (!snd_interval_single(i))
return 0;
if ((snd_interval_value(i) == width) ||
(width == 0 && snd_interval_value(i) > msbits))
ALSA: Fix handling of multiple msbits constraints on the same runtime If the sound card is made up of discrete components, each with their own driver (e.g. like in the ASoC case), we might end up with multiple msbits constraint rules installed. Currently this will result in msbits being set to whatever the last rule set it to. This patch updates the behavior of the rule to choose the minimum (other than zero) of all the installed rules. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-12-30 01:43:36 +08:00
params->msbits = min_not_zero(params->msbits, msbits);
ALSA: Add support for wildcard msbits constraints Currently the msbits constraints requires to specify a specific sample format width for which the constraint should be applied. But often the number of most significant bits is not sample format specific, but rather a absolute limit. E.g. the PCM interface might accept 32-bit and 24-bit samples, but the DAC has a 16-bit resolution and throws away the LSBs. In this case for both 32-bit and 24-bit format msbits should be set to 16. This patch extends snd_pcm_hw_constraint_msbits() so that a wildcard constraint can be setup that is applied for all formats with a sample width larger than the specified msbits. Choosing the wildcard constraint is done by setting the sample width parameter of the function to 0. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-12-30 01:43:37 +08:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return 0;
}
/**
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @runtime: PCM runtime instance
* @cond: condition bits
* @width: sample bits width
* @msbits: msbits width
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
*
ALSA: Add support for wildcard msbits constraints Currently the msbits constraints requires to specify a specific sample format width for which the constraint should be applied. But often the number of most significant bits is not sample format specific, but rather a absolute limit. E.g. the PCM interface might accept 32-bit and 24-bit samples, but the DAC has a 16-bit resolution and throws away the LSBs. In this case for both 32-bit and 24-bit format msbits should be set to 16. This patch extends snd_pcm_hw_constraint_msbits() so that a wildcard constraint can be setup that is applied for all formats with a sample width larger than the specified msbits. Choosing the wildcard constraint is done by setting the sample width parameter of the function to 0. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-12-30 01:43:37 +08:00
* This constraint will set the number of most significant bits (msbits) if a
* sample format with the specified width has been select. If width is set to 0
* the msbits will be set for any sample format with a width larger than the
* specified msbits.
*
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
* Return: Zero if successful, or a negative error code on failure.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned int cond,
unsigned int width,
unsigned int msbits)
{
unsigned long l = (msbits << 16) | width;
return snd_pcm_hw_rule_add(runtime, cond, -1,
snd_pcm_hw_rule_msbits,
(void*) l,
SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits);
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
unsigned long step = (unsigned long) rule->private;
ALSA: pcm: snd_interval_step: drop the min parameter The min parameter was not used by any caller. And if it were used, underflows in the calculations could lead to incorrect results. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-09-08 03:43:07 +08:00
return snd_interval_step(hw_param_interval(params, rule->var), step);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
/**
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* snd_pcm_hw_constraint_step - add a hw constraint step rule
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @runtime: PCM runtime instance
* @cond: condition bits
* @var: hw_params variable to apply the step constraint
* @step: step size
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
*
* Return: Zero if successful, or a negative error code on failure.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned int cond,
snd_pcm_hw_param_t var,
unsigned long step)
{
return snd_pcm_hw_rule_add(runtime, cond, var,
snd_pcm_hw_rule_step, (void *) step,
var, -1);
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_pcm_hw_constraint_step);
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
[ALSA] pcm_lib: fix sparse warning about different signedness pcm_lib: fix sparse warning about different signedness Signed-off-by: Marcin Ślusarz <marcin.slusarz@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2007-12-14 19:53:21 +08:00
static unsigned int pow2_sizes[] = {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7,
1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15,
1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23,
1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30
};
return snd_interval_list(hw_param_interval(params, rule->var),
ARRAY_SIZE(pow2_sizes), pow2_sizes, 0);
}
/**
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @runtime: PCM runtime instance
* @cond: condition bits
* @var: hw_params variable to apply the power-of-2 constraint
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
*
* Return: Zero if successful, or a negative error code on failure.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned int cond,
snd_pcm_hw_param_t var)
{
return snd_pcm_hw_rule_add(runtime, cond, var,
snd_pcm_hw_rule_pow2, NULL,
var, -1);
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2);
ALSA: pcm: add snd_pcm_hw_rule_noresample() Add a helper function to allow drivers to disable hardware resampling when the application has specified the SNDRV_PCM_HW_PARAMS_NORESAMPLE flag. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-09-17 05:03:02 +08:00
static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
unsigned int base_rate = (unsigned int)(uintptr_t)rule->private;
struct snd_interval *rate;
rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
return snd_interval_list(rate, 1, &base_rate, 0);
}
/**
* snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling
* @runtime: PCM runtime instance
* @base_rate: the rate at which the hardware does not resample
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
*
* Return: Zero if successful, or a negative error code on failure.
ALSA: pcm: add snd_pcm_hw_rule_noresample() Add a helper function to allow drivers to disable hardware resampling when the application has specified the SNDRV_PCM_HW_PARAMS_NORESAMPLE flag. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-09-17 05:03:02 +08:00
*/
int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime,
unsigned int base_rate)
{
return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE,
SNDRV_PCM_HW_PARAM_RATE,
snd_pcm_hw_rule_noresample_func,
(void *)(uintptr_t)base_rate,
SNDRV_PCM_HW_PARAM_RATE, -1);
}
EXPORT_SYMBOL(snd_pcm_hw_rule_noresample);
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params,
[ALSA] sound/core/: possible cleanups PCM Midlevel,ALSA Core,Timer Midlevel,ALSA sequencer,Virtual Midi This patch contains the following possible cleanups: - make needlessly global code static - #if 0 the following unused global functions - remove the following unneeded EXPORT_SYMBOL's Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-05-19 00:02:04 +08:00
snd_pcm_hw_param_t var)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
if (hw_is_mask(var)) {
snd_mask_any(hw_param_mask(params, var));
params->cmask |= 1 << var;
params->rmask |= 1 << var;
return;
}
if (hw_is_interval(var)) {
snd_interval_any(hw_param_interval(params, var));
params->cmask |= 1 << var;
params->rmask |= 1 << var;
return;
}
snd_BUG();
}
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
unsigned int k;
memset(params, 0, sizeof(*params));
for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++)
_snd_pcm_hw_param_any(params, k);
for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
_snd_pcm_hw_param_any(params, k);
params->info = ~0U;
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(_snd_pcm_hw_params_any);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/**
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* snd_pcm_hw_param_value - return @params field @var value
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @params: the hw_params instance
* @var: parameter to retrieve
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* @dir: pointer to the direction (-1,0,1) or %NULL
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
* Return: The value for field @var if it's fixed in configuration space
* defined by @params. -%EINVAL otherwise.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params,
snd_pcm_hw_param_t var, int *dir)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
if (hw_is_mask(var)) {
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
const struct snd_mask *mask = hw_param_mask_c(params, var);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (!snd_mask_single(mask))
return -EINVAL;
if (dir)
*dir = 0;
return snd_mask_value(mask);
}
if (hw_is_interval(var)) {
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
const struct snd_interval *i = hw_param_interval_c(params, var);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (!snd_interval_single(i))
return -EINVAL;
if (dir)
*dir = i->openmin;
return snd_interval_value(i);
}
return -EINVAL;
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_pcm_hw_param_value);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
snd_pcm_hw_param_t var)
{
if (hw_is_mask(var)) {
snd_mask_none(hw_param_mask(params, var));
params->cmask |= 1 << var;
params->rmask |= 1 << var;
} else if (hw_is_interval(var)) {
snd_interval_none(hw_param_interval(params, var));
params->cmask |= 1 << var;
params->rmask |= 1 << var;
} else {
snd_BUG();
}
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(_snd_pcm_hw_param_setempty);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params,
[ALSA] sound/core/: possible cleanups PCM Midlevel,ALSA Core,Timer Midlevel,ALSA sequencer,Virtual Midi This patch contains the following possible cleanups: - make needlessly global code static - #if 0 the following unused global functions - remove the following unneeded EXPORT_SYMBOL's Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-05-19 00:02:04 +08:00
snd_pcm_hw_param_t var)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
int changed;
if (hw_is_mask(var))
changed = snd_mask_refine_first(hw_param_mask(params, var));
else if (hw_is_interval(var))
changed = snd_interval_refine_first(hw_param_interval(params, var));
[ALSA] Clean up ugly hacks in pcm_lib.c Clean up ugly hacks for sync with alsa-lib code in pcm_lib.c. Also, optimize snd_pcm_hw_params_choose() with a loop. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
else
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return -EINVAL;
if (changed) {
params->cmask |= 1 << var;
params->rmask |= 1 << var;
}
return changed;
}
/**
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* snd_pcm_hw_param_first - refine config space and return minimum value
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @pcm: PCM instance
* @params: the hw_params instance
* @var: parameter to retrieve
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* @dir: pointer to the direction (-1,0,1) or %NULL
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* Inside configuration space defined by @params remove from @var all
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
* values > minimum. Reduce configuration space accordingly.
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
*
* Return: The minimum, or a negative error code on failure.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm,
struct snd_pcm_hw_params *params,
snd_pcm_hw_param_t var, int *dir)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
int changed = _snd_pcm_hw_param_first(params, var);
if (changed < 0)
return changed;
if (params->rmask) {
int err = snd_pcm_hw_refine(pcm, params);
ALSA: Kill snd_assert() in sound/core/* Kill snd_assert() in sound/core/*, either removed or replaced with if () with snd_BUG_ON(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-08-08 23:09:09 +08:00
if (snd_BUG_ON(err < 0))
return err;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
return snd_pcm_hw_param_value(params, var, dir);
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_pcm_hw_param_first);
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params,
[ALSA] sound/core/: possible cleanups PCM Midlevel,ALSA Core,Timer Midlevel,ALSA sequencer,Virtual Midi This patch contains the following possible cleanups: - make needlessly global code static - #if 0 the following unused global functions - remove the following unneeded EXPORT_SYMBOL's Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-05-19 00:02:04 +08:00
snd_pcm_hw_param_t var)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
int changed;
if (hw_is_mask(var))
changed = snd_mask_refine_last(hw_param_mask(params, var));
else if (hw_is_interval(var))
changed = snd_interval_refine_last(hw_param_interval(params, var));
[ALSA] Clean up ugly hacks in pcm_lib.c Clean up ugly hacks for sync with alsa-lib code in pcm_lib.c. Also, optimize snd_pcm_hw_params_choose() with a loop. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
else
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return -EINVAL;
if (changed) {
params->cmask |= 1 << var;
params->rmask |= 1 << var;
}
return changed;
}
/**
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* snd_pcm_hw_param_last - refine config space and return maximum value
[ALSA] Fix DocBook warnings PCM Midlevel,RawMidi Midlevel Fix DocBook warnings. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-07 19:38:19 +08:00
* @pcm: PCM instance
* @params: the hw_params instance
* @var: parameter to retrieve
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* @dir: pointer to the direction (-1,0,1) or %NULL
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*
ALSA: kernel docs: fix sound/core/ kernel-doc Add kernel-doc function short descriptions to sound/core functions that are missing this short description. Mostly this involves moving some of the function description onto the @funcname line. Also correct a few variable names and fix other kernel-doc notation. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2008-10-16 05:38:40 +08:00
* Inside configuration space defined by @params remove from @var all
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
* values < maximum. Reduce configuration space accordingly.
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
*
* Return: The maximum, or a negative error code on failure.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm,
struct snd_pcm_hw_params *params,
snd_pcm_hw_param_t var, int *dir)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
int changed = _snd_pcm_hw_param_last(params, var);
if (changed < 0)
return changed;
if (params->rmask) {
int err = snd_pcm_hw_refine(pcm, params);
ALSA: Kill snd_assert() in sound/core/* Kill snd_assert() in sound/core/*, either removed or replaced with if () with snd_BUG_ON(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-08-08 23:09:09 +08:00
if (snd_BUG_ON(err < 0))
return err;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
return snd_pcm_hw_param_value(params, var, dir);
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_pcm_hw_param_last);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
void *arg)
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_runtime *runtime = substream->runtime;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned long flags;
snd_pcm_stream_lock_irqsave(substream, flags);
if (snd_pcm_running(substream) &&
snd_pcm_update_hw_ptr(substream) >= 0)
runtime->status->hw_ptr %= runtime->buffer_size;
ALSA: core: keep track of boundary wrap-around Keep track of boundary crossing when hw_ptr exceeds boundary limit and wraps-around. This will help keep track of total number of frames played/received at the kernel level Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:14 +08:00
else {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
runtime->status->hw_ptr = 0;
ALSA: core: keep track of boundary wrap-around Keep track of boundary crossing when hw_ptr exceeds boundary limit and wraps-around. This will help keep track of total number of frames played/received at the kernel level Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-10-23 05:42:14 +08:00
runtime->hw_ptr_wrap = 0;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
snd_pcm_stream_unlock_irqrestore(substream, flags);
return 0;
}
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
void *arg)
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_channel_info *info = arg;
struct snd_pcm_runtime *runtime = substream->runtime;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
int width;
if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) {
info->offset = -1;
return 0;
}
width = snd_pcm_format_physical_width(runtime->format);
if (width < 0)
return width;
info->offset = 0;
switch (runtime->access) {
case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED:
case SNDRV_PCM_ACCESS_RW_INTERLEAVED:
info->first = info->channel * width;
info->step = runtime->channels * width;
break;
case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED:
case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED:
{
size_t size = runtime->dma_bytes / runtime->channels;
info->first = info->channel * size * 8;
info->step = width;
break;
}
default:
snd_BUG();
break;
}
return 0;
}
ALSA: PCM midlevel: improve fifo_size handling Move the fifo_size assignment to hw->ioctl callback to allow lowlevel drivers overwrite the default behaviour. fifo_size is in frames not bytes as specified in asound.h and alsa-lib's documentation, but most hardware have fixed byte based FIFOs. Introduce internal SNDRV_PCM_INFO_FIFO_IN_FRAMES. Signed-off-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-27 15:44:40 +08:00
static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream,
void *arg)
{
struct snd_pcm_hw_params *params = arg;
snd_pcm_format_t format;
ALSA: pcm: fix fifo_size frame calculation The calculated frame size was wrong because snd_pcm_format_physical_width() actually returns the number of bits, not bytes. Use snd_pcm_format_size() instead, which not only returns bytes, but also simplifies the calculation. Fixes: 8bea869c5e56 ("ALSA: PCM midlevel: improve fifo_size handling") Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-09-22 04:50:57 +08:00
int channels;
ssize_t frame_size;
ALSA: PCM midlevel: improve fifo_size handling Move the fifo_size assignment to hw->ioctl callback to allow lowlevel drivers overwrite the default behaviour. fifo_size is in frames not bytes as specified in asound.h and alsa-lib's documentation, but most hardware have fixed byte based FIFOs. Introduce internal SNDRV_PCM_INFO_FIFO_IN_FRAMES. Signed-off-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-27 15:44:40 +08:00
params->fifo_size = substream->runtime->hw.fifo_size;
if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) {
format = params_format(params);
channels = params_channels(params);
ALSA: pcm: fix fifo_size frame calculation The calculated frame size was wrong because snd_pcm_format_physical_width() actually returns the number of bits, not bytes. Use snd_pcm_format_size() instead, which not only returns bytes, but also simplifies the calculation. Fixes: 8bea869c5e56 ("ALSA: PCM midlevel: improve fifo_size handling") Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-09-22 04:50:57 +08:00
frame_size = snd_pcm_format_size(format, channels);
if (frame_size > 0)
params->fifo_size /= (unsigned)frame_size;
ALSA: PCM midlevel: improve fifo_size handling Move the fifo_size assignment to hw->ioctl callback to allow lowlevel drivers overwrite the default behaviour. fifo_size is in frames not bytes as specified in asound.h and alsa-lib's documentation, but most hardware have fixed byte based FIFOs. Introduce internal SNDRV_PCM_INFO_FIFO_IN_FRAMES. Signed-off-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-27 15:44:40 +08:00
}
return 0;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/**
* snd_pcm_lib_ioctl - a generic PCM ioctl callback
* @substream: the pcm substream instance
* @cmd: ioctl command
* @arg: ioctl argument
*
* Processes the generic ioctl commands for PCM.
* Can be passed as the ioctl callback for PCM ops.
*
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
* Return: Zero if successful, or a negative error code on failure.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned int cmd, void *arg)
{
switch (cmd) {
case SNDRV_PCM_IOCTL1_INFO:
return 0;
case SNDRV_PCM_IOCTL1_RESET:
return snd_pcm_lib_ioctl_reset(substream, arg);
case SNDRV_PCM_IOCTL1_CHANNEL_INFO:
return snd_pcm_lib_ioctl_channel_info(substream, arg);
ALSA: PCM midlevel: improve fifo_size handling Move the fifo_size assignment to hw->ioctl callback to allow lowlevel drivers overwrite the default behaviour. fifo_size is in frames not bytes as specified in asound.h and alsa-lib's documentation, but most hardware have fixed byte based FIFOs. Introduce internal SNDRV_PCM_INFO_FIFO_IN_FRAMES. Signed-off-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-27 15:44:40 +08:00
case SNDRV_PCM_IOCTL1_FIFO_SIZE:
return snd_pcm_lib_ioctl_fifo_size(substream, arg);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
return -ENXIO;
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_pcm_lib_ioctl);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/**
* snd_pcm_period_elapsed - update the pcm status for the next period
* @substream: the pcm substream instance
*
* This function is called from the interrupt handler when the
* PCM has processed the period size. It will update the current
[ALSA] Remove PCM sleep_min and tick The 'tick' in PCM is set (again) via sw_params. And, nobody uses this feature at all except for a command line option of aplay. (This is literally 'nobody', as I checked alsa-lib API calls in all programs in major distros.) Above all, if we need finer wake-ups for the position update, it's basically an issue that the driver should solve, not tuned by each application. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-01-09 01:09:57 +08:00
* pointer, wake up sleepers, etc.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*
* Even if more than one periods have elapsed since the last call, you
* have to call this only once.
*/
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
void snd_pcm_period_elapsed(struct snd_pcm_substream *substream)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_runtime *runtime;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned long flags;
ALSA: Kill snd_assert() in sound/core/* Kill snd_assert() in sound/core/*, either removed or replaced with if () with snd_BUG_ON(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-08-08 23:09:09 +08:00
if (PCM_RUNTIME_CHECK(substream))
return;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
runtime = substream->runtime;
snd_pcm_stream_lock_irqsave(substream, flags);
if (!snd_pcm_running(substream) ||
ALSA: pcm_lib - cleanup & merge hw_ptr update functions Do general cleanup in snd_pcm_update_hw_ptr*() routines and merge them. The main change is hw_ptr_interrupt variable removal to simplify code logic. This variable can be computed directly from hw_ptr. Ensure that updated hw_ptr is not lower than previous one (it was possible with old code in some obscure situations when interrupt was delayed or the lowlevel driver returns wrong ring buffer position value). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-06 00:19:34 +08:00
snd_pcm_update_hw_ptr0(substream, 1) < 0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
goto _end;
ALSA: timer: add config item to export PCM timer disabling for expert PCM timer is not always used. For embedded device, we need an interface to disable it when it is not needed, to shrink the kernel size and memory footprint, here add CONFIG_SND_PCM_TIMER for it. When both CONFIG_SND_PCM_TIMER and CONFIG_SND_TIMER is unselected, about 25KB saving bonus we can get. Please be noted that when disabled, those stubs who using pcm timer (e.g. dmix, dsnoop & co) may work incorrectlly. Suggested-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jie Yang <yang.jie@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-10-16 17:57:46 +08:00
#ifdef CONFIG_SND_PCM_TIMER
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (substream->timer_running)
snd_timer_interrupt(substream->timer, 1);
ALSA: timer: add config item to export PCM timer disabling for expert PCM timer is not always used. For embedded device, we need an interface to disable it when it is not needed, to shrink the kernel size and memory footprint, here add CONFIG_SND_PCM_TIMER for it. When both CONFIG_SND_PCM_TIMER and CONFIG_SND_TIMER is unselected, about 25KB saving bonus we can get. Please be noted that when disabled, those stubs who using pcm timer (e.g. dmix, dsnoop & co) may work incorrectlly. Suggested-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jie Yang <yang.jie@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-10-16 17:57:46 +08:00
#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
_end:
kill_fasync(&runtime->fasync, SIGIO, POLL_IN);
ALSA: pcm : Call kill_fasync() in stream lock Currently kill_fasync() is called outside the stream lock in snd_pcm_period_elapsed(). This is potentially racy, since the stream may get released even during the irq handler is running. Although snd_pcm_release_substream() calls snd_pcm_drop(), this doesn't guarantee that the irq handler finishes, thus the kill_fasync() call outside the stream spin lock may be invoked after the substream is detached, as recently reported by KASAN. As a quick workaround, move kill_fasync() call inside the stream lock. The fasync is rarely used interface, so this shouldn't have a big impact from the performance POV. Ideally, we should implement some sync mechanism for the proper finish of stream and irq handler. But this oneliner should suffice for most cases, so far. Reported-by: Baozeng Ding <sploving1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2016-04-15 00:02:37 +08:00
snd_pcm_stream_unlock_irqrestore(substream, flags);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module Move EXPORT_SYMBOL()s to places adjacent to functions/variables. Also move OSS-specific hw_params helper functions to pcm_oss.c. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-04-28 21:13:40 +08:00
EXPORT_SYMBOL(snd_pcm_period_elapsed);
[ALSA] PCM - clean up snd_pcm_lib_read/write Introduce a common helper function for snd_pcm_lib_read and snd_pcm_lib_write for cleaning up the code. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-01-09 01:08:14 +08:00
/*
* Wait until avail_min data becomes available
* Returns a negative error code if any error occurs during operation.
* The available space is stored on availp. When err = 0 and avail = 0
* on the capture stream, it indicates the stream is in DRAINING state.
*/
ALSA: pcm_lib: avoid timing jitter in snd_pcm_read/write() When using poll() to wait for the next period -- or avail_min samples -- one gets a consistent delay for each system call that is usually just a little short of the selected period time. However, When using snd_pcm_read/write(), one gets a jittery delay that alternates between less than a millisecond and approximately two period times. This is caused by snd_pcm_lib_{read,write}1() transferring any available samples to the user's buffer and adjusting the application pointer prior to sleeping to the end of the current period. When the next period interrupt occurs, there is then less than avail_min samples remaining to be transferred in the period, so we end up sleeping until a second period occurs. This is solved by using runtime->twake as the number of samples needed for a wakeup in addition to selecting the proper wait queue to wake in snd_pcm_update_state(). This requires twake to be non-zero when used by snd_pcm_lib_{read,write}1() even if avail_min is zero. Signed-off-by: Dave Dillow <dave@thedillows.org> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-06-27 06:13:20 +08:00
static int wait_for_avail(struct snd_pcm_substream *substream,
[ALSA] PCM - clean up snd_pcm_lib_read/write Introduce a common helper function for snd_pcm_lib_read and snd_pcm_lib_write for cleaning up the code. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-01-09 01:08:14 +08:00
snd_pcm_uframes_t *availp)
{
struct snd_pcm_runtime *runtime = substream->runtime;
int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
wait_queue_t wait;
int err = 0;
snd_pcm_uframes_t avail = 0;
ALSA: PCM - Don't check DMA time-out too shortly When the PCM period size is set larger than 10 seconds, currently the PCM core may abort the operation with DMA-error due to the fixed timeout for 10 seconds. A similar problem is seen in the drain operation that has a fixed timeout of 10 seconds, too. This patch fixes the timeout length depending on the period size and rate, also including the consideration of no_period_wakeup flag. Reported-by: Raymond Yau <superquad.vortex2@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-05-26 14:09:38 +08:00
long wait_time, tout;
ALSA: pcm - fix race condition in wait_for_avail() wait_for_avail() in pcm_lib.c has a race in it (observed in practice by an Intel validation group). The function is supposed to return once space in the buffer has become available, or if some timeout happens. The entity that creates space (irq handler of sound driver and some such) will do a wake up on a waitqueue that this function registers for. However there are two races in the existing code 1) If space became available between the caller noticing there was no space and this function actually sleeping, the wakeup is missed and the timeout condition will happen instead 2) If a wakeup happened but not sufficient space became available, the code will loop again and wait for more space. However, if the second wake comes in prior to hitting the schedule_timeout_interruptible(), it will be missed, and potentially you'll wait out until the timeout happens. The fix consists of using more careful setting of the current state (so that if a wakeup happens in the main loop window, the schedule_timeout() falls through) and by checking for available space prior to going into the schedule_timeout() loop, but after being on the waitqueue and having the state set to interruptible. [tiwai: the following changes have been added to Arjan's original patch: - merged akpm's fix for waitqueue adding order into a single patch - reduction of duplicated code of avail check ] Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-09-15 14:49:25 +08:00
init_waitqueue_entry(&wait, current);
set_current_state(TASK_INTERRUPTIBLE);
add_wait_queue(&runtime->tsleep, &wait);
ALSA: PCM - Don't check DMA time-out too shortly When the PCM period size is set larger than 10 seconds, currently the PCM core may abort the operation with DMA-error due to the fixed timeout for 10 seconds. A similar problem is seen in the drain operation that has a fixed timeout of 10 seconds, too. This patch fixes the timeout length depending on the period size and rate, also including the consideration of no_period_wakeup flag. Reported-by: Raymond Yau <superquad.vortex2@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-05-26 14:09:38 +08:00
if (runtime->no_period_wakeup)
wait_time = MAX_SCHEDULE_TIMEOUT;
else {
wait_time = 10;
if (runtime->rate) {
long t = runtime->period_size * 2 / runtime->rate;
wait_time = max(t, wait_time);
}
wait_time = msecs_to_jiffies(wait_time * 1000);
}
ALSA: pcm - fix race condition in wait_for_avail() wait_for_avail() in pcm_lib.c has a race in it (observed in practice by an Intel validation group). The function is supposed to return once space in the buffer has become available, or if some timeout happens. The entity that creates space (irq handler of sound driver and some such) will do a wake up on a waitqueue that this function registers for. However there are two races in the existing code 1) If space became available between the caller noticing there was no space and this function actually sleeping, the wakeup is missed and the timeout condition will happen instead 2) If a wakeup happened but not sufficient space became available, the code will loop again and wait for more space. However, if the second wake comes in prior to hitting the schedule_timeout_interruptible(), it will be missed, and potentially you'll wait out until the timeout happens. The fix consists of using more careful setting of the current state (so that if a wakeup happens in the main loop window, the schedule_timeout() falls through) and by checking for available space prior to going into the schedule_timeout() loop, but after being on the waitqueue and having the state set to interruptible. [tiwai: the following changes have been added to Arjan's original patch: - merged akpm's fix for waitqueue adding order into a single patch - reduction of duplicated code of avail check ] Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-09-15 14:49:25 +08:00
[ALSA] PCM - clean up snd_pcm_lib_read/write Introduce a common helper function for snd_pcm_lib_read and snd_pcm_lib_write for cleaning up the code. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-01-09 01:08:14 +08:00
for (;;) {
if (signal_pending(current)) {
err = -ERESTARTSYS;
break;
}
ALSA: pcm - fix race condition in wait_for_avail() wait_for_avail() in pcm_lib.c has a race in it (observed in practice by an Intel validation group). The function is supposed to return once space in the buffer has become available, or if some timeout happens. The entity that creates space (irq handler of sound driver and some such) will do a wake up on a waitqueue that this function registers for. However there are two races in the existing code 1) If space became available between the caller noticing there was no space and this function actually sleeping, the wakeup is missed and the timeout condition will happen instead 2) If a wakeup happened but not sufficient space became available, the code will loop again and wait for more space. However, if the second wake comes in prior to hitting the schedule_timeout_interruptible(), it will be missed, and potentially you'll wait out until the timeout happens. The fix consists of using more careful setting of the current state (so that if a wakeup happens in the main loop window, the schedule_timeout() falls through) and by checking for available space prior to going into the schedule_timeout() loop, but after being on the waitqueue and having the state set to interruptible. [tiwai: the following changes have been added to Arjan's original patch: - merged akpm's fix for waitqueue adding order into a single patch - reduction of duplicated code of avail check ] Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-09-15 14:49:25 +08:00
/*
* We need to check if space became available already
* (and thus the wakeup happened already) first to close
* the race of space already having become available.
* This check must happen after been added to the waitqueue
* and having current state be INTERRUPTIBLE.
*/
if (is_playback)
avail = snd_pcm_playback_avail(runtime);
else
avail = snd_pcm_capture_avail(runtime);
if (avail >= runtime->twake)
break;
[ALSA] PCM - clean up snd_pcm_lib_read/write Introduce a common helper function for snd_pcm_lib_read and snd_pcm_lib_write for cleaning up the code. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-01-09 01:08:14 +08:00
snd_pcm_stream_unlock_irq(substream);
ALSA: pcm - fix race condition in wait_for_avail() wait_for_avail() in pcm_lib.c has a race in it (observed in practice by an Intel validation group). The function is supposed to return once space in the buffer has become available, or if some timeout happens. The entity that creates space (irq handler of sound driver and some such) will do a wake up on a waitqueue that this function registers for. However there are two races in the existing code 1) If space became available between the caller noticing there was no space and this function actually sleeping, the wakeup is missed and the timeout condition will happen instead 2) If a wakeup happened but not sufficient space became available, the code will loop again and wait for more space. However, if the second wake comes in prior to hitting the schedule_timeout_interruptible(), it will be missed, and potentially you'll wait out until the timeout happens. The fix consists of using more careful setting of the current state (so that if a wakeup happens in the main loop window, the schedule_timeout() falls through) and by checking for available space prior to going into the schedule_timeout() loop, but after being on the waitqueue and having the state set to interruptible. [tiwai: the following changes have been added to Arjan's original patch: - merged akpm's fix for waitqueue adding order into a single patch - reduction of duplicated code of avail check ] Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-09-15 14:49:25 +08:00
tout = schedule_timeout(wait_time);
[ALSA] PCM - clean up snd_pcm_lib_read/write Introduce a common helper function for snd_pcm_lib_read and snd_pcm_lib_write for cleaning up the code. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-01-09 01:08:14 +08:00
snd_pcm_stream_lock_irq(substream);
ALSA: pcm - fix race condition in wait_for_avail() wait_for_avail() in pcm_lib.c has a race in it (observed in practice by an Intel validation group). The function is supposed to return once space in the buffer has become available, or if some timeout happens. The entity that creates space (irq handler of sound driver and some such) will do a wake up on a waitqueue that this function registers for. However there are two races in the existing code 1) If space became available between the caller noticing there was no space and this function actually sleeping, the wakeup is missed and the timeout condition will happen instead 2) If a wakeup happened but not sufficient space became available, the code will loop again and wait for more space. However, if the second wake comes in prior to hitting the schedule_timeout_interruptible(), it will be missed, and potentially you'll wait out until the timeout happens. The fix consists of using more careful setting of the current state (so that if a wakeup happens in the main loop window, the schedule_timeout() falls through) and by checking for available space prior to going into the schedule_timeout() loop, but after being on the waitqueue and having the state set to interruptible. [tiwai: the following changes have been added to Arjan's original patch: - merged akpm's fix for waitqueue adding order into a single patch - reduction of duplicated code of avail check ] Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-09-15 14:49:25 +08:00
set_current_state(TASK_INTERRUPTIBLE);
[ALSA] PCM - clean up snd_pcm_lib_read/write Introduce a common helper function for snd_pcm_lib_read and snd_pcm_lib_write for cleaning up the code. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-01-09 01:08:14 +08:00
switch (runtime->status->state) {
case SNDRV_PCM_STATE_SUSPENDED:
err = -ESTRPIPE;
goto _endloop;
case SNDRV_PCM_STATE_XRUN:
err = -EPIPE;
goto _endloop;
case SNDRV_PCM_STATE_DRAINING:
if (is_playback)
err = -EPIPE;
else
avail = 0; /* indicate draining */
goto _endloop;
case SNDRV_PCM_STATE_OPEN:
case SNDRV_PCM_STATE_SETUP:
case SNDRV_PCM_STATE_DISCONNECTED:
err = -EBADFD;
goto _endloop;
ALSA: Add SNDRV_PCM_STATE_PAUSED case in wait_for_avail function When the process is sleeping at the SNDRV_PCM_STATE_PAUSED state from the wait_for_avail function, the sleep process will be woken by timeout(10 seconds). Even if the sleep process wake up by timeout, by this patch, the process will continue with sleep and wait for the other state. Signed-off-by: JongHo Kim <furmuwon@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-12-17 22:02:24 +08:00
case SNDRV_PCM_STATE_PAUSED:
continue;
[ALSA] PCM - clean up snd_pcm_lib_read/write Introduce a common helper function for snd_pcm_lib_read and snd_pcm_lib_write for cleaning up the code. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-01-09 01:08:14 +08:00
}
if (!tout) {
ALSA: pcm: Use standard printk helpers Use dev_err() & co as much as possible. If not available (no device assigned at the calling point), use pr_xxx() helpers instead. For simplicity, introduce new helpers for pcm stream, pcm_err(), etc. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-02-05 01:19:48 +08:00
pcm_dbg(substream->pcm,
"%s write error (DMA or IRQ trouble?)\n",
is_playback ? "playback" : "capture");
[ALSA] PCM - clean up snd_pcm_lib_read/write Introduce a common helper function for snd_pcm_lib_read and snd_pcm_lib_write for cleaning up the code. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-01-09 01:08:14 +08:00
err = -EIO;
break;
}
}
_endloop:
ALSA: pcm - fix race condition in wait_for_avail() wait_for_avail() in pcm_lib.c has a race in it (observed in practice by an Intel validation group). The function is supposed to return once space in the buffer has become available, or if some timeout happens. The entity that creates space (irq handler of sound driver and some such) will do a wake up on a waitqueue that this function registers for. However there are two races in the existing code 1) If space became available between the caller noticing there was no space and this function actually sleeping, the wakeup is missed and the timeout condition will happen instead 2) If a wakeup happened but not sufficient space became available, the code will loop again and wait for more space. However, if the second wake comes in prior to hitting the schedule_timeout_interruptible(), it will be missed, and potentially you'll wait out until the timeout happens. The fix consists of using more careful setting of the current state (so that if a wakeup happens in the main loop window, the schedule_timeout() falls through) and by checking for available space prior to going into the schedule_timeout() loop, but after being on the waitqueue and having the state set to interruptible. [tiwai: the following changes have been added to Arjan's original patch: - merged akpm's fix for waitqueue adding order into a single patch - reduction of duplicated code of avail check ] Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-09-15 14:49:25 +08:00
set_current_state(TASK_RUNNING);
ALSA: pcm_core: Fix wake_up() optimization This change fixes the "ALSA: pcm_lib - optimize wake_up() calls for PCM I/O" commit. New sleeping queue is introduced to separate user space and kernel space wake_ups. runtime->nowake is renamed to twake (transfer wake). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-21 17:32:15 +08:00
remove_wait_queue(&runtime->tsleep, &wait);
[ALSA] PCM - clean up snd_pcm_lib_read/write Introduce a common helper function for snd_pcm_lib_read and snd_pcm_lib_write for cleaning up the code. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-01-09 01:08:14 +08:00
*availp = avail;
return err;
}
ALSA: pcm: More unification of PCM transfer codes This patch proceeds more abstraction of PCM read/write loop codes. For both interleaved and non-interleaved transfers, the same copy or silence transfer code (which is defined as pcm_transfer_f) is used now. This became possible since we switched to byte size to copy_* and fill_silence ops argument instead of frames. And, for both read and write, we can use the same copy function (which is defined as pcm_copy_f), just depending on whether interleaved or non-interleaved mode. The transfer function is determined at the beginning of the loop, depending on whether the driver gives the specific copy ops or it's the standard read/write. Another bonus by this change is that we now guarantee the silencing behavior when NULL buffer is passed to write helpers. It'll simplify some codes later. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:15:26 +08:00
typedef int (*pcm_transfer_f)(struct snd_pcm_substream *substream,
int channel, unsigned long hwoff,
void *buf, unsigned long bytes);
ALSA: pcm: Shuffle codes Just shuffle the codes, without any change otherwise. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-24 23:59:17 +08:00
ALSA: pcm: More unification of PCM transfer codes This patch proceeds more abstraction of PCM read/write loop codes. For both interleaved and non-interleaved transfers, the same copy or silence transfer code (which is defined as pcm_transfer_f) is used now. This became possible since we switched to byte size to copy_* and fill_silence ops argument instead of frames. And, for both read and write, we can use the same copy function (which is defined as pcm_copy_f), just depending on whether interleaved or non-interleaved mode. The transfer function is determined at the beginning of the loop, depending on whether the driver gives the specific copy ops or it's the standard read/write. Another bonus by this change is that we now guarantee the silencing behavior when NULL buffer is passed to write helpers. It'll simplify some codes later. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:15:26 +08:00
typedef int (*pcm_copy_f)(struct snd_pcm_substream *, snd_pcm_uframes_t, void *,
snd_pcm_uframes_t, snd_pcm_uframes_t, pcm_transfer_f);
/* calculate the target DMA-buffer position to be written/read */
static void *get_dma_ptr(struct snd_pcm_runtime *runtime,
int channel, unsigned long hwoff)
{
return runtime->dma_area + hwoff +
channel * (runtime->dma_bytes / runtime->channels);
}
ALSA: pcm: Unify read/write loop Both __snd_pcm_lib_read() and __snd_pcm_write() functions have almost the same code to loop over samples. For simplification, this patch unifies both as the single helper, __snd_pcm_lib_xfer(). Other than that, there should be no functional change by this patch. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 04:36:23 +08:00
/* default copy_user ops for write; used for both interleaved and non- modes */
static int default_write_copy(struct snd_pcm_substream *substream,
int channel, unsigned long hwoff,
void *buf, unsigned long bytes)
ALSA: pcm: More unification of PCM transfer codes This patch proceeds more abstraction of PCM read/write loop codes. For both interleaved and non-interleaved transfers, the same copy or silence transfer code (which is defined as pcm_transfer_f) is used now. This became possible since we switched to byte size to copy_* and fill_silence ops argument instead of frames. And, for both read and write, we can use the same copy function (which is defined as pcm_copy_f), just depending on whether interleaved or non-interleaved mode. The transfer function is determined at the beginning of the loop, depending on whether the driver gives the specific copy ops or it's the standard read/write. Another bonus by this change is that we now guarantee the silencing behavior when NULL buffer is passed to write helpers. It'll simplify some codes later. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:15:26 +08:00
{
if (copy_from_user(get_dma_ptr(substream->runtime, channel, hwoff),
ALSA: pcm: Unify read/write loop Both __snd_pcm_lib_read() and __snd_pcm_write() functions have almost the same code to loop over samples. For simplification, this patch unifies both as the single helper, __snd_pcm_lib_xfer(). Other than that, there should be no functional change by this patch. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 04:36:23 +08:00
(void __user *)buf, bytes))
ALSA: pcm: More unification of PCM transfer codes This patch proceeds more abstraction of PCM read/write loop codes. For both interleaved and non-interleaved transfers, the same copy or silence transfer code (which is defined as pcm_transfer_f) is used now. This became possible since we switched to byte size to copy_* and fill_silence ops argument instead of frames. And, for both read and write, we can use the same copy function (which is defined as pcm_copy_f), just depending on whether interleaved or non-interleaved mode. The transfer function is determined at the beginning of the loop, depending on whether the driver gives the specific copy ops or it's the standard read/write. Another bonus by this change is that we now guarantee the silencing behavior when NULL buffer is passed to write helpers. It'll simplify some codes later. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:15:26 +08:00
return -EFAULT;
return 0;
}
ALSA: pcm: Direct in-kernel read/write support Now all materials are ready, let's allow the direct in-kernel read/write, i.e. a kernel-space buffer is passed for read or write, instead of the normal user-space buffer. This feature is used by OSS layer and UAC1 driver, for example. The __snd_pcm_lib_xfer() takes in_kernel argument that indicates the in-kernel buffer copy. When this flag is set, another transfer code is used. It's either via copy_kernel PCM ops or the normal memcpy(), depending on the driver setup. As external API, snd_pcm_kernel_read(), *_write() and other variants are provided. That's all. This support is really simple because of the code refactoring until now. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:23:20 +08:00
/* default copy_kernel ops for write */
static int default_write_copy_kernel(struct snd_pcm_substream *substream,
int channel, unsigned long hwoff,
void *buf, unsigned long bytes)
{
memcpy(get_dma_ptr(substream->runtime, channel, hwoff), buf, bytes);
return 0;
}
ALSA: pcm: More unification of PCM transfer codes This patch proceeds more abstraction of PCM read/write loop codes. For both interleaved and non-interleaved transfers, the same copy or silence transfer code (which is defined as pcm_transfer_f) is used now. This became possible since we switched to byte size to copy_* and fill_silence ops argument instead of frames. And, for both read and write, we can use the same copy function (which is defined as pcm_copy_f), just depending on whether interleaved or non-interleaved mode. The transfer function is determined at the beginning of the loop, depending on whether the driver gives the specific copy ops or it's the standard read/write. Another bonus by this change is that we now guarantee the silencing behavior when NULL buffer is passed to write helpers. It'll simplify some codes later. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:15:26 +08:00
/* fill silence instead of copy data; called as a transfer helper
* from __snd_pcm_lib_write() or directly from noninterleaved_copy() when
* a NULL buffer is passed
*/
static int fill_silence(struct snd_pcm_substream *substream, int channel,
unsigned long hwoff, void *buf, unsigned long bytes)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_runtime *runtime = substream->runtime;
ALSA: pcm: More unification of PCM transfer codes This patch proceeds more abstraction of PCM read/write loop codes. For both interleaved and non-interleaved transfers, the same copy or silence transfer code (which is defined as pcm_transfer_f) is used now. This became possible since we switched to byte size to copy_* and fill_silence ops argument instead of frames. And, for both read and write, we can use the same copy function (which is defined as pcm_copy_f), just depending on whether interleaved or non-interleaved mode. The transfer function is determined at the beginning of the loop, depending on whether the driver gives the specific copy ops or it's the standard read/write. Another bonus by this change is that we now guarantee the silencing behavior when NULL buffer is passed to write helpers. It'll simplify some codes later. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:15:26 +08:00
if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
return 0;
if (substream->ops->fill_silence)
return substream->ops->fill_silence(substream, channel,
hwoff, bytes);
snd_pcm_format_set_silence(runtime->format,
get_dma_ptr(runtime, channel, hwoff),
bytes_to_samples(runtime, bytes));
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return 0;
}
ALSA: pcm: More unification of PCM transfer codes This patch proceeds more abstraction of PCM read/write loop codes. For both interleaved and non-interleaved transfers, the same copy or silence transfer code (which is defined as pcm_transfer_f) is used now. This became possible since we switched to byte size to copy_* and fill_silence ops argument instead of frames. And, for both read and write, we can use the same copy function (which is defined as pcm_copy_f), just depending on whether interleaved or non-interleaved mode. The transfer function is determined at the beginning of the loop, depending on whether the driver gives the specific copy ops or it's the standard read/write. Another bonus by this change is that we now guarantee the silencing behavior when NULL buffer is passed to write helpers. It'll simplify some codes later. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:15:26 +08:00
ALSA: pcm: Unify read/write loop Both __snd_pcm_lib_read() and __snd_pcm_write() functions have almost the same code to loop over samples. For simplification, this patch unifies both as the single helper, __snd_pcm_lib_xfer(). Other than that, there should be no functional change by this patch. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 04:36:23 +08:00
/* default copy_user ops for read; used for both interleaved and non- modes */
static int default_read_copy(struct snd_pcm_substream *substream,
int channel, unsigned long hwoff,
void *buf, unsigned long bytes)
{
if (copy_to_user((void __user *)buf,
get_dma_ptr(substream->runtime, channel, hwoff),
bytes))
return -EFAULT;
return 0;
}
ALSA: pcm: Direct in-kernel read/write support Now all materials are ready, let's allow the direct in-kernel read/write, i.e. a kernel-space buffer is passed for read or write, instead of the normal user-space buffer. This feature is used by OSS layer and UAC1 driver, for example. The __snd_pcm_lib_xfer() takes in_kernel argument that indicates the in-kernel buffer copy. When this flag is set, another transfer code is used. It's either via copy_kernel PCM ops or the normal memcpy(), depending on the driver setup. As external API, snd_pcm_kernel_read(), *_write() and other variants are provided. That's all. This support is really simple because of the code refactoring until now. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:23:20 +08:00
/* default copy_kernel ops for read */
static int default_read_copy_kernel(struct snd_pcm_substream *substream,
int channel, unsigned long hwoff,
void *buf, unsigned long bytes)
{
memcpy(buf, get_dma_ptr(substream->runtime, channel, hwoff), bytes);
return 0;
}
ALSA: pcm: More unification of PCM transfer codes This patch proceeds more abstraction of PCM read/write loop codes. For both interleaved and non-interleaved transfers, the same copy or silence transfer code (which is defined as pcm_transfer_f) is used now. This became possible since we switched to byte size to copy_* and fill_silence ops argument instead of frames. And, for both read and write, we can use the same copy function (which is defined as pcm_copy_f), just depending on whether interleaved or non-interleaved mode. The transfer function is determined at the beginning of the loop, depending on whether the driver gives the specific copy ops or it's the standard read/write. Another bonus by this change is that we now guarantee the silencing behavior when NULL buffer is passed to write helpers. It'll simplify some codes later. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:15:26 +08:00
/* call transfer function with the converted pointers and sizes;
* for interleaved mode, it's one shot for all samples
*/
static int interleaved_copy(struct snd_pcm_substream *substream,
snd_pcm_uframes_t hwoff, void *data,
snd_pcm_uframes_t off,
snd_pcm_uframes_t frames,
pcm_transfer_f transfer)
{
struct snd_pcm_runtime *runtime = substream->runtime;
/* convert to bytes */
hwoff = frames_to_bytes(runtime, hwoff);
off = frames_to_bytes(runtime, off);
frames = frames_to_bytes(runtime, frames);
return transfer(substream, 0, hwoff, data + off, frames);
}
/* call transfer function with the converted pointers and sizes for each
* non-interleaved channel; when buffer is NULL, silencing instead of copying
*/
static int noninterleaved_copy(struct snd_pcm_substream *substream,
snd_pcm_uframes_t hwoff, void *data,
snd_pcm_uframes_t off,
snd_pcm_uframes_t frames,
pcm_transfer_f transfer)
ALSA: pcm: Shuffle codes Just shuffle the codes, without any change otherwise. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-24 23:59:17 +08:00
{
struct snd_pcm_runtime *runtime = substream->runtime;
int channels = runtime->channels;
ALSA: pcm: More unification of PCM transfer codes This patch proceeds more abstraction of PCM read/write loop codes. For both interleaved and non-interleaved transfers, the same copy or silence transfer code (which is defined as pcm_transfer_f) is used now. This became possible since we switched to byte size to copy_* and fill_silence ops argument instead of frames. And, for both read and write, we can use the same copy function (which is defined as pcm_copy_f), just depending on whether interleaved or non-interleaved mode. The transfer function is determined at the beginning of the loop, depending on whether the driver gives the specific copy ops or it's the standard read/write. Another bonus by this change is that we now guarantee the silencing behavior when NULL buffer is passed to write helpers. It'll simplify some codes later. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:15:26 +08:00
void **bufs = data;
int c, err;
/* convert to bytes; note that it's not frames_to_bytes() here.
* in non-interleaved mode, we copy for each channel, thus
* each copy is n_samples bytes x channels = whole frames.
*/
off = samples_to_bytes(runtime, off);
frames = samples_to_bytes(runtime, frames);
hwoff = samples_to_bytes(runtime, hwoff);
for (c = 0; c < channels; ++c, ++bufs) {
if (!data || !*bufs)
err = fill_silence(substream, c, hwoff, NULL, frames);
else
err = transfer(substream, c, hwoff, *bufs + off,
frames);
if (err < 0)
return err;
ALSA: pcm: Shuffle codes Just shuffle the codes, without any change otherwise. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-24 23:59:17 +08:00
}
return 0;
}
ALSA: pcm: Simplify snd_pcm_playback_silence() Use the existing silence helper codes for simplification. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:18:15 +08:00
/* fill silence on the given buffer position;
* called from snd_pcm_playback_silence()
*/
static int fill_silence_frames(struct snd_pcm_substream *substream,
snd_pcm_uframes_t off, snd_pcm_uframes_t frames)
{
if (substream->runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
substream->runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED)
return interleaved_copy(substream, off, NULL, 0, frames,
fill_silence);
else
return noninterleaved_copy(substream, off, NULL, 0, frames,
fill_silence);
}
ALSA: pcm: Shuffle codes Just shuffle the codes, without any change otherwise. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-24 23:59:17 +08:00
/* sanity-check for read/write methods */
static int pcm_sanity_check(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime;
if (PCM_RUNTIME_CHECK(substream))
return -ENXIO;
runtime = substream->runtime;
if (snd_BUG_ON(!substream->ops->copy_user && !runtime->dma_area))
return -EINVAL;
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
return -EBADFD;
return 0;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
ALSA: pcm: Check PCM state by a common helper function Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-24 23:51:30 +08:00
static int pcm_accessible_state(struct snd_pcm_runtime *runtime)
{
switch (runtime->status->state) {
case SNDRV_PCM_STATE_PREPARED:
case SNDRV_PCM_STATE_RUNNING:
case SNDRV_PCM_STATE_PAUSED:
return 0;
case SNDRV_PCM_STATE_XRUN:
return -EPIPE;
case SNDRV_PCM_STATE_SUSPENDED:
return -ESTRPIPE;
default:
return -EBADFD;
}
}
ALSA: pcm: unify codes to operate application-side position on PCM buffer In a series of recent work, ALSA PCM core got some arrangements to handle application-side position on PCM buffer. However, relevant codes still disperse to two translation units This commit unifies these codes into a helper function. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-06-12 08:41:44 +08:00
/* update to the given appl_ptr and call ack callback if needed;
* when an error is returned, take back to the original value
*/
int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream,
snd_pcm_uframes_t appl_ptr)
{
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_uframes_t old_appl_ptr = runtime->control->appl_ptr;
int ret;
runtime->control->appl_ptr = appl_ptr;
if (substream->ops->ack) {
ret = substream->ops->ack(substream);
if (ret < 0) {
runtime->control->appl_ptr = old_appl_ptr;
return ret;
}
}
ALSA: pcm: add 'applptr' event of tracepoint In design of ALSA PCM core, status and control data for runtime of ALSA PCM substream are shared between kernel/user spaces by page frame mapping with read-only attribute. Both of hardware-side and application-side position on PCM buffer are maintained as a part of the status data. In a view of ALSA PCM application, these two positions can be updated by executing ioctl(2) with some commands. There's an event of tracepoint for hardware-side position; 'hwptr'. On the other hand, no events for application-side position. This commit adds a new event for this purpose; 'applptr'. When the application-side position is changed in kernel space, this event is probed with useful information for developers. I note that the event is not probed for all of ALSA PCM applications, When applications are written by read/write programming scenario, the event is surely probed. The applications execute ioctl(2) with SNDRV_PCM_IOCTL_[READ|WRITE][N/I]_FRAMES to read/write any PCM frame, then ALSA PCM core updates the application-side position in kernel land. However, when applications are written by mmap programming scenario, if maintaining the application side position in kernel space accurately, applications should voluntarily execute ioctl(2) with SNDRV_PCM_IOCTL_SYNC_PTR to commit the number of handled PCM frames. If not voluntarily, the application-side position is not changed, thus the added event is not probed. There's a loophole, using architectures to which ALSA PCM core judges non cache coherent. In this case, the status and control data is not mapped into processe's VMA for any applications. Userland library, alsa-lib, is programmed for this case. It executes ioctl(2) with SNDRV_PCM_IOCTL_SYNC_PTR command every time to requiring the status and control data. ARM is such an architecture. Below is an example with serial sound interface (ssi) on i.mx6 quad core SoC. I use v4.1 kernel released by fsl-community with patches from VIA Tech. Inc. for VAB820, and my backport patches for relevant features for this patchset. I use Ubuntu 17.04 from ports.ubuntu.com as user land for armhf architecture. $ aplay -v -M -D hw:imx6vab820sgtl5,0 /dev/urandom -f S16_LE -r 48000 --period-size=128 --buffer-size=256 Playing raw data '/dev/urandom' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono Hardware PCM card 0 'imx6-vab820-sgtl5000' device 0 subdevice 0 Its setup is: stream : PLAYBACK access : MMAP_INTERLEAVED format : S16_LE subformat : STD channels : 1 rate : 48000 exact rate : 48000 (48000/1) msbits : 16 buffer_size : 256 period_size : 128 period_time : 2666 tstamp_mode : NONE tstamp_type : MONOTONIC period_step : 1 avail_min : 128 period_event : 0 start_threshold : 256 stop_threshold : 256 silence_threshold: 0 silence_size : 0 boundary : 1073741824 appl_ptr : 0 hw_ptr : 0 mmap_area[0] = 0x76f98000,0,16 (16) $ trace-cmd record -e snd_pcm:hwptr -e snd_pcm:applptr $ trace-cmd report ... 60.208495: applptr: pcmC0D0p/sub0: prev=1792, curr=1792, avail=0, period=128, buf=256 60.208633: applptr: pcmC0D0p/sub0: prev=1792, curr=1792, avail=0, period=128, buf=256 60.210022: hwptr: pcmC0D0p/sub0: IRQ: pos=128, old=1536, base=1536, period=128, buf=256 60.210202: applptr: pcmC0D0p/sub0: prev=1792, curr=1792, avail=128, period=128, buf=256 60.210344: hwptr: pcmC0D0p/sub0: POS: pos=128, old=1664, base=1536, period=128, buf=256 60.210348: applptr: pcmC0D0p/sub0: prev=1792, curr=1792, avail=128, period=128, buf=256 60.210486: applptr: pcmC0D0p/sub0: prev=1792, curr=1792, avail=128, period=128, buf=256 60.210626: applptr: pcmC0D0p/sub0: prev=1792, curr=1920, avail=0, period=128, buf=256 60.211002: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=0, period=128, buf=256 60.211142: hwptr: pcmC0D0p/sub0: POS: pos=128, old=1664, base=1536, period=128, buf=256 60.211146: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=0, period=128, buf=256 60.211287: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=0, period=128, buf=256 60.212690: hwptr: pcmC0D0p/sub0: IRQ: pos=0, old=1664, base=1536, period=128, buf=256 60.212866: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=128, period=128, buf=256 60.212999: hwptr: pcmC0D0p/sub0: POS: pos=0, old=1792, base=1792, period=128, buf=256 60.213003: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=128, period=128, buf=256 60.213135: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=128, period=128, buf=256 60.213276: applptr: pcmC0D0p/sub0: prev=1920, curr=2048, avail=0, period=128, buf=256 60.213654: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=0, period=128, buf=256 60.213796: hwptr: pcmC0D0p/sub0: POS: pos=0, old=1792, base=1792, period=128, buf=256 60.213800: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=0, period=128, buf=256 60.213937: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=0, period=128, buf=256 60.215356: hwptr: pcmC0D0p/sub0: IRQ: pos=128, old=1792, base=1792, period=128, buf=256 60.215542: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=128, period=128, buf=256 60.215679: hwptr: pcmC0D0p/sub0: POS: pos=128, old=1920, base=1792, period=128, buf=256 60.215683: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=128, period=128, buf=256 60.215813: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=128, period=128, buf=256 60.215947: applptr: pcmC0D0p/sub0: prev=2048, curr=2176, avail=0, period=128, buf=256 ... We can surely see 'applptr' event is probed even if the application run for mmap programming scenario ('-M' option and 'hw' plugin). Below is a result of strace: 02:44:15.886382 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.887203 poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL}], 1, -1) = 1 ([{fd=4, revents=POLLOUT}]) 02:44:15.887471 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.887637 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.887805 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.887969 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.888132 read(3, "..."..., 256) = 256 02:44:15.889040 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.889221 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.889431 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.889606 poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL}], 1, -1) = 1 ([{fd=4, revents=POLLOUT}]) 02:44:15.889833 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.889998 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.890164 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.891048 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.891228 read(3, "..."..., 256) = 256 02:44:15.891497 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.891661 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.891829 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 02:44:15.891991 poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL}], 1, -1) = 1 ([{fd=4, revents=POLLOUT}]) 02:44:15.893007 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0 We can see 7 calls of ioctl(2) with SNDRV_PCM_IOCTL_SYNC_PTR per loop with call of poll(2). 128 PCM frames are transferred per loop of one poll(2), because the PCM substream is configured with S16_LE format and 1 channel (2 byte * 1 * 128 = 256 bytes). This equals to the size of period of PCM buffer. Comparing to the probed data, one of the 7 calls of ioctl(2) is actually used to commit the number of copied PCM frames to kernel space. The other calls are just used to check runtime status of PCM substream; e.g. XRUN. The tracepoint event is useful to investigate this case. I note that below modules are related to the above sample. * snd-soc-dummy.ko * snd-soc-imx-sgtl5000.ko * snd-soc-fsl-ssi.ko * snd-soc-imx-pcm-dma.ko * snd-soc-sgtl5000.ko My additional note is lock acquisition. The event is probed under acquiring PCM stream lock. This means that calculation in the event is free from any hardware events. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-06-12 08:41:45 +08:00
trace_applptr(substream, old_appl_ptr, appl_ptr);
ALSA: pcm: unify codes to operate application-side position on PCM buffer In a series of recent work, ALSA PCM core got some arrangements to handle application-side position on PCM buffer. However, relevant codes still disperse to two translation units This commit unifies these codes into a helper function. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-06-12 08:41:44 +08:00
return 0;
}
ALSA: pcm: Unify read/write loop Both __snd_pcm_lib_read() and __snd_pcm_write() functions have almost the same code to loop over samples. For simplification, this patch unifies both as the single helper, __snd_pcm_lib_xfer(). Other than that, there should be no functional change by this patch. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 04:36:23 +08:00
/* the common loop for read/write data */
snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream,
void *data, bool interleaved,
ALSA: pcm: Direct in-kernel read/write support Now all materials are ready, let's allow the direct in-kernel read/write, i.e. a kernel-space buffer is passed for read or write, instead of the normal user-space buffer. This feature is used by OSS layer and UAC1 driver, for example. The __snd_pcm_lib_xfer() takes in_kernel argument that indicates the in-kernel buffer copy. When this flag is set, another transfer code is used. It's either via copy_kernel PCM ops or the normal memcpy(), depending on the driver setup. As external API, snd_pcm_kernel_read(), *_write() and other variants are provided. That's all. This support is really simple because of the code refactoring until now. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:23:20 +08:00
snd_pcm_uframes_t size, bool in_kernel)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
[ALSA] Remove xxx_t typedefs: PCM Modules: PCM Midlevel Remove xxx_t typedefs from the core PCM codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-11-17 20:59:38 +08:00
struct snd_pcm_runtime *runtime = substream->runtime;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
snd_pcm_uframes_t xfer = 0;
snd_pcm_uframes_t offset = 0;
ALSA: pcm - Optimize the call of snd_pcm_update_hw_ptr() in read/write loop In the PCM read/write loop, the driver calls snd_pcm_update_hw_ptr() at each time at the beginning of the loop. Russell King reported that this hogs CPU significantly. The current code assumes that the pointer callback is very fast and cheap, also not too much fine grained. It's not true in all cases. When the pointer advances short samples while the read/write copy has been performed, the driver updates the hw_ptr and gets avail > 0 again. Then it tries to read/write these small chunks. This repeats until the avail really gets to zero. For avoiding this situation, a simple workaround is to call snd_pcm_update_hw_ptr() only once at starting the loop, assuming that the read/write copy is performed fast enough. If the available count becomes short, it goes to snd_pcm_wait_avail() anyway, and this processes right. Tested-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-05-11 23:50:49 +08:00
snd_pcm_uframes_t avail;
ALSA: pcm: More unification of PCM transfer codes This patch proceeds more abstraction of PCM read/write loop codes. For both interleaved and non-interleaved transfers, the same copy or silence transfer code (which is defined as pcm_transfer_f) is used now. This became possible since we switched to byte size to copy_* and fill_silence ops argument instead of frames. And, for both read and write, we can use the same copy function (which is defined as pcm_copy_f), just depending on whether interleaved or non-interleaved mode. The transfer function is determined at the beginning of the loop, depending on whether the driver gives the specific copy ops or it's the standard read/write. Another bonus by this change is that we now guarantee the silencing behavior when NULL buffer is passed to write helpers. It'll simplify some codes later. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:15:26 +08:00
pcm_copy_f writer;
pcm_transfer_f transfer;
ALSA: pcm: Call directly the common read/write helpers Make snd_pcm_lib_read() and *_write() static inline functions that call the common helper functions directly. This reduces a slight amount of codes, and at the same time, it's a preparation for the further cleanups / fixes. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-21 15:35:21 +08:00
bool nonblock;
ALSA: pcm: Unify read/write loop Both __snd_pcm_lib_read() and __snd_pcm_write() functions have almost the same code to loop over samples. For simplification, this patch unifies both as the single helper, __snd_pcm_lib_xfer(). Other than that, there should be no functional change by this patch. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 04:36:23 +08:00
bool is_playback;
ALSA: pcm: Call directly the common read/write helpers Make snd_pcm_lib_read() and *_write() static inline functions that call the common helper functions directly. This reduces a slight amount of codes, and at the same time, it's a preparation for the further cleanups / fixes. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-21 15:35:21 +08:00
int err;
err = pcm_sanity_check(substream);
if (err < 0)
return err;
ALSA: pcm: Unify read/write loop Both __snd_pcm_lib_read() and __snd_pcm_write() functions have almost the same code to loop over samples. For simplification, this patch unifies both as the single helper, __snd_pcm_lib_xfer(). Other than that, there should be no functional change by this patch. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 04:36:23 +08:00
is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
ALSA: pcm: Call directly the common read/write helpers Make snd_pcm_lib_read() and *_write() static inline functions that call the common helper functions directly. This reduces a slight amount of codes, and at the same time, it's a preparation for the further cleanups / fixes. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-21 15:35:21 +08:00
if (interleaved) {
if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED &&
runtime->channels > 1)
return -EINVAL;
ALSA: pcm: More unification of PCM transfer codes This patch proceeds more abstraction of PCM read/write loop codes. For both interleaved and non-interleaved transfers, the same copy or silence transfer code (which is defined as pcm_transfer_f) is used now. This became possible since we switched to byte size to copy_* and fill_silence ops argument instead of frames. And, for both read and write, we can use the same copy function (which is defined as pcm_copy_f), just depending on whether interleaved or non-interleaved mode. The transfer function is determined at the beginning of the loop, depending on whether the driver gives the specific copy ops or it's the standard read/write. Another bonus by this change is that we now guarantee the silencing behavior when NULL buffer is passed to write helpers. It'll simplify some codes later. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:15:26 +08:00
writer = interleaved_copy;
ALSA: pcm: Call directly the common read/write helpers Make snd_pcm_lib_read() and *_write() static inline functions that call the common helper functions directly. This reduces a slight amount of codes, and at the same time, it's a preparation for the further cleanups / fixes. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-21 15:35:21 +08:00
} else {
if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
return -EINVAL;
ALSA: pcm: More unification of PCM transfer codes This patch proceeds more abstraction of PCM read/write loop codes. For both interleaved and non-interleaved transfers, the same copy or silence transfer code (which is defined as pcm_transfer_f) is used now. This became possible since we switched to byte size to copy_* and fill_silence ops argument instead of frames. And, for both read and write, we can use the same copy function (which is defined as pcm_copy_f), just depending on whether interleaved or non-interleaved mode. The transfer function is determined at the beginning of the loop, depending on whether the driver gives the specific copy ops or it's the standard read/write. Another bonus by this change is that we now guarantee the silencing behavior when NULL buffer is passed to write helpers. It'll simplify some codes later. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:15:26 +08:00
writer = noninterleaved_copy;
}
if (!data) {
ALSA: pcm: Unify read/write loop Both __snd_pcm_lib_read() and __snd_pcm_write() functions have almost the same code to loop over samples. For simplification, this patch unifies both as the single helper, __snd_pcm_lib_xfer(). Other than that, there should be no functional change by this patch. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 04:36:23 +08:00
if (is_playback)
transfer = fill_silence;
else
return -EINVAL;
ALSA: pcm: Direct in-kernel read/write support Now all materials are ready, let's allow the direct in-kernel read/write, i.e. a kernel-space buffer is passed for read or write, instead of the normal user-space buffer. This feature is used by OSS layer and UAC1 driver, for example. The __snd_pcm_lib_xfer() takes in_kernel argument that indicates the in-kernel buffer copy. When this flag is set, another transfer code is used. It's either via copy_kernel PCM ops or the normal memcpy(), depending on the driver setup. As external API, snd_pcm_kernel_read(), *_write() and other variants are provided. That's all. This support is really simple because of the code refactoring until now. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:23:20 +08:00
} else if (in_kernel) {
if (substream->ops->copy_kernel)
transfer = substream->ops->copy_kernel;
else
transfer = is_playback ?
default_write_copy_kernel : default_read_copy_kernel;
ALSA: pcm: More unification of PCM transfer codes This patch proceeds more abstraction of PCM read/write loop codes. For both interleaved and non-interleaved transfers, the same copy or silence transfer code (which is defined as pcm_transfer_f) is used now. This became possible since we switched to byte size to copy_* and fill_silence ops argument instead of frames. And, for both read and write, we can use the same copy function (which is defined as pcm_copy_f), just depending on whether interleaved or non-interleaved mode. The transfer function is determined at the beginning of the loop, depending on whether the driver gives the specific copy ops or it's the standard read/write. Another bonus by this change is that we now guarantee the silencing behavior when NULL buffer is passed to write helpers. It'll simplify some codes later. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:15:26 +08:00
} else {
if (substream->ops->copy_user)
transfer = (pcm_transfer_f)substream->ops->copy_user;
else
ALSA: pcm: Unify read/write loop Both __snd_pcm_lib_read() and __snd_pcm_write() functions have almost the same code to loop over samples. For simplification, this patch unifies both as the single helper, __snd_pcm_lib_xfer(). Other than that, there should be no functional change by this patch. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 04:36:23 +08:00
transfer = is_playback ?
default_write_copy : default_read_copy;
ALSA: pcm: Call directly the common read/write helpers Make snd_pcm_lib_read() and *_write() static inline functions that call the common helper functions directly. This reduces a slight amount of codes, and at the same time, it's a preparation for the further cleanups / fixes. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-21 15:35:21 +08:00
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (size == 0)
return 0;
ALSA: pcm: Call directly the common read/write helpers Make snd_pcm_lib_read() and *_write() static inline functions that call the common helper functions directly. This reduces a slight amount of codes, and at the same time, it's a preparation for the further cleanups / fixes. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-21 15:35:21 +08:00
nonblock = !!(substream->f_flags & O_NONBLOCK);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
snd_pcm_stream_lock_irq(substream);
ALSA: pcm: Check PCM state by a common helper function Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-24 23:51:30 +08:00
err = pcm_accessible_state(runtime);
if (err < 0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
goto _end_unlock;
ALSA: pcm: Unify read/write loop Both __snd_pcm_lib_read() and __snd_pcm_write() functions have almost the same code to loop over samples. For simplification, this patch unifies both as the single helper, __snd_pcm_lib_xfer(). Other than that, there should be no functional change by this patch. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 04:36:23 +08:00
if (!is_playback &&
runtime->status->state == SNDRV_PCM_STATE_PREPARED &&
ALSA: pcm: Check PCM state by a common helper function Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-24 23:51:30 +08:00
size >= runtime->start_threshold) {
err = snd_pcm_start(substream);
if (err < 0)
goto _end_unlock;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
ALSA: pcm_lib: avoid timing jitter in snd_pcm_read/write() When using poll() to wait for the next period -- or avail_min samples -- one gets a consistent delay for each system call that is usually just a little short of the selected period time. However, When using snd_pcm_read/write(), one gets a jittery delay that alternates between less than a millisecond and approximately two period times. This is caused by snd_pcm_lib_{read,write}1() transferring any available samples to the user's buffer and adjusting the application pointer prior to sleeping to the end of the current period. When the next period interrupt occurs, there is then less than avail_min samples remaining to be transferred in the period, so we end up sleeping until a second period occurs. This is solved by using runtime->twake as the number of samples needed for a wakeup in addition to selecting the proper wait queue to wake in snd_pcm_update_state(). This requires twake to be non-zero when used by snd_pcm_lib_{read,write}1() even if avail_min is zero. Signed-off-by: Dave Dillow <dave@thedillows.org> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-06-27 06:13:20 +08:00
runtime->twake = runtime->control->avail_min ? : 1;
ALSA: pcm - Optimize the call of snd_pcm_update_hw_ptr() in read/write loop In the PCM read/write loop, the driver calls snd_pcm_update_hw_ptr() at each time at the beginning of the loop. Russell King reported that this hogs CPU significantly. The current code assumes that the pointer callback is very fast and cheap, also not too much fine grained. It's not true in all cases. When the pointer advances short samples while the read/write copy has been performed, the driver updates the hw_ptr and gets avail > 0 again. Then it tries to read/write these small chunks. This repeats until the avail really gets to zero. For avoiding this situation, a simple workaround is to call snd_pcm_update_hw_ptr() only once at starting the loop, assuming that the read/write copy is performed fast enough. If the available count becomes short, it goes to snd_pcm_wait_avail() anyway, and this processes right. Tested-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-05-11 23:50:49 +08:00
if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
snd_pcm_update_hw_ptr(substream);
ALSA: pcm: Unify read/write loop Both __snd_pcm_lib_read() and __snd_pcm_write() functions have almost the same code to loop over samples. For simplification, this patch unifies both as the single helper, __snd_pcm_lib_xfer(). Other than that, there should be no functional change by this patch. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 04:36:23 +08:00
if (is_playback)
avail = snd_pcm_playback_avail(runtime);
else
avail = snd_pcm_capture_avail(runtime);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
while (size > 0) {
snd_pcm_uframes_t frames, appl_ptr, appl_ofs;
snd_pcm_uframes_t cont;
[ALSA] PCM - clean up snd_pcm_lib_read/write Introduce a common helper function for snd_pcm_lib_read and snd_pcm_lib_write for cleaning up the code. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-01-09 01:08:14 +08:00
if (!avail) {
ALSA: pcm: Unify read/write loop Both __snd_pcm_lib_read() and __snd_pcm_write() functions have almost the same code to loop over samples. For simplification, this patch unifies both as the single helper, __snd_pcm_lib_xfer(). Other than that, there should be no functional change by this patch. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 04:36:23 +08:00
if (!is_playback &&
runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
[ALSA] PCM - clean up snd_pcm_lib_read/write Introduce a common helper function for snd_pcm_lib_read and snd_pcm_lib_write for cleaning up the code. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-01-09 01:08:14 +08:00
snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
goto _end_unlock;
}
if (nonblock) {
err = -EAGAIN;
goto _end_unlock;
}
ALSA: pcm_lib: avoid timing jitter in snd_pcm_read/write() When using poll() to wait for the next period -- or avail_min samples -- one gets a consistent delay for each system call that is usually just a little short of the selected period time. However, When using snd_pcm_read/write(), one gets a jittery delay that alternates between less than a millisecond and approximately two period times. This is caused by snd_pcm_lib_{read,write}1() transferring any available samples to the user's buffer and adjusting the application pointer prior to sleeping to the end of the current period. When the next period interrupt occurs, there is then less than avail_min samples remaining to be transferred in the period, so we end up sleeping until a second period occurs. This is solved by using runtime->twake as the number of samples needed for a wakeup in addition to selecting the proper wait queue to wake in snd_pcm_update_state(). This requires twake to be non-zero when used by snd_pcm_lib_{read,write}1() even if avail_min is zero. Signed-off-by: Dave Dillow <dave@thedillows.org> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-06-27 06:13:20 +08:00
runtime->twake = min_t(snd_pcm_uframes_t, size,
runtime->control->avail_min ? : 1);
err = wait_for_avail(substream, &avail);
[ALSA] PCM - clean up snd_pcm_lib_read/write Introduce a common helper function for snd_pcm_lib_read and snd_pcm_lib_write for cleaning up the code. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-01-09 01:08:14 +08:00
if (err < 0)
[ALSA] ALSA's struct _snd_pcm_substream: Obsolete open_flag PCM Midlevel,ALSA<-OSS emulation,USB USX2Y This patch removes open_flag from struct _snd_pcm_substream. All of its uses are substituted by querying struct _snd_pcm_substream's member ffile instead. Signed-off-by: Karsten Wiese <annabellesgarden@yahoo.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-08-10 17:18:19 +08:00
goto _end_unlock;
[ALSA] PCM - clean up snd_pcm_lib_read/write Introduce a common helper function for snd_pcm_lib_read and snd_pcm_lib_write for cleaning up the code. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-01-09 01:08:14 +08:00
if (!avail)
continue; /* draining */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
frames = size > avail ? avail : size;
cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size;
if (frames > cont)
frames = cont;
ALSA: Kill snd_assert() in sound/core/* Kill snd_assert() in sound/core/*, either removed or replaced with if () with snd_BUG_ON(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-08-08 23:09:09 +08:00
if (snd_BUG_ON(!frames)) {
ALSA: pcm_core: Fix wake_up() optimization This change fixes the "ALSA: pcm_lib - optimize wake_up() calls for PCM I/O" commit. New sleeping queue is introduced to separate user space and kernel space wake_ups. runtime->nowake is renamed to twake (transfer wake). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-21 17:32:15 +08:00
runtime->twake = 0;
ALSA: Kill snd_assert() in sound/core/* Kill snd_assert() in sound/core/*, either removed or replaced with if () with snd_BUG_ON(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-08-08 23:09:09 +08:00
snd_pcm_stream_unlock_irq(substream);
return -EINVAL;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
appl_ptr = runtime->control->appl_ptr;
appl_ofs = appl_ptr % runtime->buffer_size;
snd_pcm_stream_unlock_irq(substream);
ALSA: pcm: Unify read/write loop Both __snd_pcm_lib_read() and __snd_pcm_write() functions have almost the same code to loop over samples. For simplification, this patch unifies both as the single helper, __snd_pcm_lib_xfer(). Other than that, there should be no functional change by this patch. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 04:36:23 +08:00
err = writer(substream, appl_ofs, data, offset, frames,
ALSA: pcm: More unification of PCM transfer codes This patch proceeds more abstraction of PCM read/write loop codes. For both interleaved and non-interleaved transfers, the same copy or silence transfer code (which is defined as pcm_transfer_f) is used now. This became possible since we switched to byte size to copy_* and fill_silence ops argument instead of frames. And, for both read and write, we can use the same copy function (which is defined as pcm_copy_f), just depending on whether interleaved or non-interleaved mode. The transfer function is determined at the beginning of the loop, depending on whether the driver gives the specific copy ops or it's the standard read/write. Another bonus by this change is that we now guarantee the silencing behavior when NULL buffer is passed to write helpers. It'll simplify some codes later. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 00:15:26 +08:00
transfer);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
snd_pcm_stream_lock_irq(substream);
ALSA: pcm_lib - optimize wake_up() calls for PCM I/O As noted by pl bossart <bossart.nospam@gmail.com>, the PCM I/O routines (snd_pcm_lib_write1, snd_pcm_lib_read1) should block wake_up() calls until all samples are not processed. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-07 22:36:31 +08:00
if (err < 0)
goto _end_unlock;
ALSA: pcm: Check PCM state by a common helper function Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-24 23:51:30 +08:00
err = pcm_accessible_state(runtime);
if (err < 0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
goto _end_unlock;
appl_ptr += frames;
if (appl_ptr >= runtime->boundary)
appl_ptr -= runtime->boundary;
ALSA: pcm: unify codes to operate application-side position on PCM buffer In a series of recent work, ALSA PCM core got some arrangements to handle application-side position on PCM buffer. However, relevant codes still disperse to two translation units This commit unifies these codes into a helper function. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-06-12 08:41:44 +08:00
err = pcm_lib_apply_appl_ptr(substream, appl_ptr);
if (err < 0)
goto _end_unlock;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
offset += frames;
size -= frames;
xfer += frames;
ALSA: pcm - Optimize the call of snd_pcm_update_hw_ptr() in read/write loop In the PCM read/write loop, the driver calls snd_pcm_update_hw_ptr() at each time at the beginning of the loop. Russell King reported that this hogs CPU significantly. The current code assumes that the pointer callback is very fast and cheap, also not too much fine grained. It's not true in all cases. When the pointer advances short samples while the read/write copy has been performed, the driver updates the hw_ptr and gets avail > 0 again. Then it tries to read/write these small chunks. This repeats until the avail really gets to zero. For avoiding this situation, a simple workaround is to call snd_pcm_update_hw_ptr() only once at starting the loop, assuming that the read/write copy is performed fast enough. If the available count becomes short, it goes to snd_pcm_wait_avail() anyway, and this processes right. Tested-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-05-11 23:50:49 +08:00
avail -= frames;
ALSA: pcm: Unify read/write loop Both __snd_pcm_lib_read() and __snd_pcm_write() functions have almost the same code to loop over samples. For simplification, this patch unifies both as the single helper, __snd_pcm_lib_xfer(). Other than that, there should be no functional change by this patch. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 04:36:23 +08:00
if (is_playback &&
runtime->status->state == SNDRV_PCM_STATE_PREPARED &&
snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) {
err = snd_pcm_start(substream);
if (err < 0)
goto _end_unlock;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
_end_unlock:
ALSA: pcm_core: Fix wake_up() optimization This change fixes the "ALSA: pcm_lib - optimize wake_up() calls for PCM I/O" commit. New sleeping queue is introduced to separate user space and kernel space wake_ups. runtime->nowake is renamed to twake (transfer wake). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-21 17:32:15 +08:00
runtime->twake = 0;
ALSA: pcm_lib - optimize wake_up() calls for PCM I/O As noted by pl bossart <bossart.nospam@gmail.com>, the PCM I/O routines (snd_pcm_lib_write1, snd_pcm_lib_read1) should block wake_up() calls until all samples are not processed. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2010-01-07 22:36:31 +08:00
if (xfer > 0 && err >= 0)
snd_pcm_update_state(substream, runtime);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
snd_pcm_stream_unlock_irq(substream);
return xfer > 0 ? (snd_pcm_sframes_t)xfer : err;
}
ALSA: pcm: Unify read/write loop Both __snd_pcm_lib_read() and __snd_pcm_write() functions have almost the same code to loop over samples. For simplification, this patch unifies both as the single helper, __snd_pcm_lib_xfer(). Other than that, there should be no functional change by this patch. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-05-25 04:36:23 +08:00
EXPORT_SYMBOL(__snd_pcm_lib_xfer);
ALSA: PCM: channel mapping API implementation This patch implements the basic data types for the standard channel mapping API handling. - The definitions of the channel positions and the new TLV types are added in sound/asound.h and sound/tlv.h, so that they can be referred from user-space. - Introduced a new helper function snd_pcm_add_chmap_ctls() to create control elements representing the channel maps for each PCM (sub)stream. - Some standard pre-defined channel maps are provided for convenience. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-07-28 00:27:00 +08:00
/*
* standard channel mapping helpers
*/
/* default channel maps for multi-channel playbacks, up to 8 channels */
const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = {
{ .channels = 1,
ALSA: Fix leftover chmap UNKNOWN -> MONO conversions A few files have been slipped from the previous commit to add MONO channel type. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-09-13 20:48:46 +08:00
.map = { SNDRV_CHMAP_MONO } },
ALSA: PCM: channel mapping API implementation This patch implements the basic data types for the standard channel mapping API handling. - The definitions of the channel positions and the new TLV types are added in sound/asound.h and sound/tlv.h, so that they can be referred from user-space. - Introduced a new helper function snd_pcm_add_chmap_ctls() to create control elements representing the channel maps for each PCM (sub)stream. - Some standard pre-defined channel maps are provided for convenience. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-07-28 00:27:00 +08:00
{ .channels = 2,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
{ .channels = 4,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ .channels = 6,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } },
{ .channels = 8,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } },
{ }
};
EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps);
/* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */
const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = {
{ .channels = 1,
ALSA: Fix leftover chmap UNKNOWN -> MONO conversions A few files have been slipped from the previous commit to add MONO channel type. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-09-13 20:48:46 +08:00
.map = { SNDRV_CHMAP_MONO } },
ALSA: PCM: channel mapping API implementation This patch implements the basic data types for the standard channel mapping API handling. - The definitions of the channel positions and the new TLV types are added in sound/asound.h and sound/tlv.h, so that they can be referred from user-space. - Introduced a new helper function snd_pcm_add_chmap_ctls() to create control elements representing the channel maps for each PCM (sub)stream. - Some standard pre-defined channel maps are provided for convenience. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-07-28 00:27:00 +08:00
{ .channels = 2,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
{ .channels = 4,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ .channels = 6,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
{ .channels = 8,
.map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE,
SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } },
{ }
};
EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps);
static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch)
{
if (ch > info->max_channels)
return false;
return !info->channel_mask || (info->channel_mask & (1U << ch));
}
static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 0;
uinfo->count = info->max_channels;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = SNDRV_CHMAP_LAST;
return 0;
}
/* get callback for channel map ctl element
* stores the channel position firstly matching with the current channels
*/
static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
struct snd_pcm_substream *substream;
const struct snd_pcm_chmap_elem *map;
if (snd_BUG_ON(!info->chmap))
return -EINVAL;
substream = snd_pcm_chmap_substream(info, idx);
if (!substream)
return -ENODEV;
memset(ucontrol->value.integer.value, 0,
sizeof(ucontrol->value.integer.value));
if (!substream->runtime)
return 0; /* no channels set */
for (map = info->chmap; map->channels; map++) {
int i;
if (map->channels == substream->runtime->channels &&
valid_chmap_channels(info, map->channels)) {
for (i = 0; i < map->channels; i++)
ucontrol->value.integer.value[i] = map->map[i];
return 0;
}
}
return -EINVAL;
}
/* tlv callback for channel map ctl element
* expands the pre-defined channel maps in a form of TLV
*/
static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
unsigned int size, unsigned int __user *tlv)
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
const struct snd_pcm_chmap_elem *map;
unsigned int __user *dst;
int c, count = 0;
if (snd_BUG_ON(!info->chmap))
return -EINVAL;
if (size < 8)
return -ENOMEM;
if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv))
return -EFAULT;
size -= 8;
dst = tlv + 2;
for (map = info->chmap; map->channels; map++) {
int chs_bytes = map->channels * 4;
if (!valid_chmap_channels(info, map->channels))
continue;
if (size < 8)
return -ENOMEM;
if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) ||
put_user(chs_bytes, dst + 1))
return -EFAULT;
dst += 2;
size -= 8;
count += 8;
if (size < chs_bytes)
return -ENOMEM;
size -= chs_bytes;
count += chs_bytes;
for (c = 0; c < map->channels; c++) {
if (put_user(map->map[c], dst))
return -EFAULT;
dst++;
}
}
if (put_user(count, tlv + 1))
return -EFAULT;
return 0;
}
static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol)
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
info->pcm->streams[info->stream].chmap_kctl = NULL;
kfree(info);
}
/**
* snd_pcm_add_chmap_ctls - create channel-mapping control elements
* @pcm: the assigned PCM instance
* @stream: stream direction
* @chmap: channel map elements (for query)
* @max_channels: the max number of channels for the stream
* @private_value: the value passed to each kcontrol's private_value field
* @info_ret: store struct snd_pcm_chmap instance if non-NULL
*
* Create channel-mapping control elements assigned to the given PCM stream(s).
ALSA: add/change some comments describing function return values script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: Yacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-12 05:05:14 +08:00
* Return: Zero if successful, or a negative error value.
ALSA: PCM: channel mapping API implementation This patch implements the basic data types for the standard channel mapping API handling. - The definitions of the channel positions and the new TLV types are added in sound/asound.h and sound/tlv.h, so that they can be referred from user-space. - Introduced a new helper function snd_pcm_add_chmap_ctls() to create control elements representing the channel maps for each PCM (sub)stream. - Some standard pre-defined channel maps are provided for convenience. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-07-28 00:27:00 +08:00
*/
int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream,
const struct snd_pcm_chmap_elem *chmap,
int max_channels,
unsigned long private_value,
struct snd_pcm_chmap **info_ret)
{
struct snd_pcm_chmap *info;
struct snd_kcontrol_new knew = {
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.access = SNDRV_CTL_ELEM_ACCESS_READ |
SNDRV_CTL_ELEM_ACCESS_TLV_READ |
SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK,
.info = pcm_chmap_ctl_info,
.get = pcm_chmap_ctl_get,
.tlv.c = pcm_chmap_ctl_tlv,
};
int err;
ALSA: pcm: Bail out when chmap is already present When snd_pcm_add_chmap_ctls() is called to the PCM stream to which a chmap has been already assigned, it returns as an error due to the conflicting snd_ctl_add() result. However, this also clears the already assigned chmap_kctl field via pcm_chmap_ctl_private_free(), and becomes inconsistent in the later operation. This patch adds the check of the conflicting chmap kctl before actually trying to allocate / assign. The check failure is treated as a kernel warning, as the double call of snd_pcm_add_chmap_ctls() is basically a driver bug and having the stack trace would help developers to figure out the bad code path. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2016-05-10 22:07:40 +08:00
if (WARN_ON(pcm->streams[stream].chmap_kctl))
return -EBUSY;
ALSA: PCM: channel mapping API implementation This patch implements the basic data types for the standard channel mapping API handling. - The definitions of the channel positions and the new TLV types are added in sound/asound.h and sound/tlv.h, so that they can be referred from user-space. - Introduced a new helper function snd_pcm_add_chmap_ctls() to create control elements representing the channel maps for each PCM (sub)stream. - Some standard pre-defined channel maps are provided for convenience. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-07-28 00:27:00 +08:00
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->pcm = pcm;
info->stream = stream;
info->chmap = chmap;
info->max_channels = max_channels;
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
knew.name = "Playback Channel Map";
else
knew.name = "Capture Channel Map";
knew.device = pcm->device;
knew.count = pcm->streams[stream].substream_count;
knew.private_value = private_value;
info->kctl = snd_ctl_new1(&knew, info);
if (!info->kctl) {
kfree(info);
return -ENOMEM;
}
info->kctl->private_free = pcm_chmap_ctl_private_free;
err = snd_ctl_add(pcm->card, info->kctl);
if (err < 0)
return err;
pcm->streams[stream].chmap_kctl = info->kctl;
if (info_ret)
*info_ret = info;
return 0;
}
EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls);
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