mirrors/vlc
0
0
Fork 0
mirror of https://github.com/videolan/vlc.git synced 2024-11-25 02:44:30 +08:00
Code Issues Packages Projects Releases Wiki Activity
ee5179d039
vlc/include/audio_output.h
Antoine Cellerier 2cb472dba0 FSF address change.
2006-01-12 23:10:04 +00:00

205 lines
8.8 KiB
C
Raw Blame History

/*****************************************************************************
* audio_output.h : audio output interface
*****************************************************************************
* Copyright (C) 2002-2005 the VideoLAN team
* $Id$
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
* 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifndef _VLC_AUDIO_OUTPUT_H
#define _VLC_AUDIO_OUTPUT_H 1
#include "vlc_es.h"
#define AOUT_FMTS_IDENTICAL( p_first, p_second ) ( \
((p_first)->i_format == (p_second)->i_format) \
&& ((p_first)->i_rate == (p_second)->i_rate) \
&& ((p_first)->i_physical_channels == (p_second)->i_physical_channels)\
&& ((p_first)->i_original_channels == (p_second)->i_original_channels) )
/* Check if i_rate == i_rate and i_channels == i_channels */
#define AOUT_FMTS_SIMILAR( p_first, p_second ) ( \
((p_first)->i_rate == (p_second)->i_rate) \
&& ((p_first)->i_physical_channels == (p_second)->i_physical_channels)\
&& ((p_first)->i_original_channels == (p_second)->i_original_channels) )
#ifdef WORDS_BIGENDIAN
# define AOUT_FMT_S16_NE VLC_FOURCC('s','1','6','b')
# define AOUT_FMT_U16_NE VLC_FOURCC('u','1','6','b')
# define AOUT_FMT_S24_NE VLC_FOURCC('s','2','4','b')
# define AOUT_FMT_SPDIF_NE VLC_FOURCC('s','p','d','b')
#else
# define AOUT_FMT_S16_NE VLC_FOURCC('s','1','6','l')
# define AOUT_FMT_U16_NE VLC_FOURCC('u','1','6','l')
# define AOUT_FMT_S24_NE VLC_FOURCC('s','2','4','l')
# define AOUT_FMT_SPDIF_NE VLC_FOURCC('s','p','d','i')
#endif
#define AOUT_FMT_NON_LINEAR( p_format ) \
( ((p_format)->i_format == VLC_FOURCC('s','p','d','i')) \
|| ((p_format)->i_format == VLC_FOURCC('s','p','d','b')) \
|| ((p_format)->i_format == VLC_FOURCC('a','5','2',' ')) \
|| ((p_format)->i_format == VLC_FOURCC('d','t','s',' ')) )
/* This is heavily borrowed from libmad, by Robert Leslie <rob@mars.org> */
/*
* Fixed-point format: 0xABBBBBBB
* A == whole part (sign + 3 bits)
* B == fractional part (28 bits)
*
* Values are signed two's complement, so the effective range is:
* 0x80000000 to 0x7fffffff
* -8.0 to +7.9999999962747097015380859375
*
* The smallest representable value is:
* 0x00000001 == 0.0000000037252902984619140625 (i.e. about 3.725e-9)
*
* 28 bits of fractional accuracy represent about
* 8.6 digits of decimal accuracy.
*
* Fixed-point numbers can be added or subtracted as normal
* integers, but multiplication requires shifting the 64-bit result
* from 56 fractional bits back to 28 (and rounding.)
*/
typedef int32_t vlc_fixed_t;
#define FIXED32_FRACBITS 28
#define FIXED32_MIN ((vlc_fixed_t) -0x80000000L)
#define FIXED32_MAX ((vlc_fixed_t) +0x7fffffffL)
#define FIXED32_ONE ((vlc_fixed_t) 0x10000000)
/*
* Channels descriptions
*/
/* Values available for physical and original channels */
#define AOUT_CHAN_CENTER 0x1
#define AOUT_CHAN_LEFT 0x2
#define AOUT_CHAN_RIGHT 0x4
#define AOUT_CHAN_REARCENTER 0x10
#define AOUT_CHAN_REARLEFT 0x20
#define AOUT_CHAN_REARRIGHT 0x40
#define AOUT_CHAN_MIDDLELEFT 0x100
#define AOUT_CHAN_MIDDLERIGHT 0x200
#define AOUT_CHAN_LFE 0x1000
/* Values available for original channels only */
#define AOUT_CHAN_DOLBYSTEREO 0x10000
#define AOUT_CHAN_DUALMONO 0x20000
#define AOUT_CHAN_REVERSESTEREO 0x40000
#define AOUT_CHAN_PHYSMASK 0xFFFF
#define AOUT_CHAN_MAX 9
/* Values used for the audio-device and audio-channels object variables */
#define AOUT_VAR_MONO 1
#define AOUT_VAR_STEREO 2
#define AOUT_VAR_2F2R 4
#define AOUT_VAR_3F2R 5
#define AOUT_VAR_5_1 6
#define AOUT_VAR_6_1 7
#define AOUT_VAR_7_1 8
#define AOUT_VAR_SPDIF 10
#define AOUT_VAR_CHAN_STEREO 1
#define AOUT_VAR_CHAN_RSTEREO 2
#define AOUT_VAR_CHAN_LEFT 3
#define AOUT_VAR_CHAN_RIGHT 4
#define AOUT_VAR_CHAN_DOLBYS 5
/*****************************************************************************
* aout_buffer_t : audio output buffer
*****************************************************************************/
struct aout_buffer_t
{
byte_t * p_buffer;
int i_alloc_type;
/* i_size is the real size of the buffer (used for debug ONLY), i_nb_bytes
* is the number of significative bytes in it. */
size_t i_size, i_nb_bytes;
unsigned int i_nb_samples;
mtime_t start_date, end_date;
struct aout_buffer_t * p_next;
/** Private data (aout_buffer_t will disappear soon so no need for an
* aout_buffer_sys_t type) */
void * p_sys;
/** This way the release can be overloaded */
void (*pf_release)( aout_buffer_t * );
};
/* Size of a frame for S/PDIF output. */
#define AOUT_SPDIF_SIZE 6144
/* Number of samples in an A/52 frame. */
#define A52_FRAME_NB 1536
/*****************************************************************************
* audio_date_t : date incrementation without long-term rounding errors
*****************************************************************************/
struct audio_date_t
{
mtime_t date;
uint32_t i_divider;
uint32_t i_remainder;
};
/*****************************************************************************
* Prototypes
*****************************************************************************/
/* From common.c : */
#define aout_New(a) __aout_New(VLC_OBJECT(a))
VLC_EXPORT( aout_instance_t *, __aout_New, ( vlc_object_t * ) );
VLC_EXPORT( void, aout_Delete, ( aout_instance_t * ) );
VLC_EXPORT( void, aout_DateInit, ( audio_date_t *, uint32_t ) );
VLC_EXPORT( void, aout_DateSet, ( audio_date_t *, mtime_t ) );
VLC_EXPORT( void, aout_DateMove, ( audio_date_t *, mtime_t ) );
VLC_EXPORT( mtime_t, aout_DateGet, ( const audio_date_t * ) );
VLC_EXPORT( mtime_t, aout_DateIncrement, ( audio_date_t *, uint32_t ) );
VLC_EXPORT( int, aout_CheckChannelReorder, ( const uint32_t *, const uint32_t *, uint32_t, int, int * ) );
VLC_EXPORT( void, aout_ChannelReorder, ( uint8_t *, int, int, const int *, int ) );
/* From dec.c : */
#define aout_DecNew(a, b, c) __aout_DecNew(VLC_OBJECT(a), b, c)
VLC_EXPORT( aout_input_t *, __aout_DecNew, ( vlc_object_t *, aout_instance_t **, audio_sample_format_t * ) );
VLC_EXPORT( int, aout_DecDelete, ( aout_instance_t *, aout_input_t * ) );
VLC_EXPORT( aout_buffer_t *, aout_DecNewBuffer, ( aout_instance_t *, aout_input_t *, size_t ) );
VLC_EXPORT( void, aout_DecDeleteBuffer, ( aout_instance_t *, aout_input_t *, aout_buffer_t * ) );
VLC_EXPORT( int, aout_DecPlay, ( aout_instance_t *, aout_input_t *, aout_buffer_t * ) );
/* From intf.c : */
#define aout_VolumeGet(a, b) __aout_VolumeGet(VLC_OBJECT(a), b)
VLC_EXPORT( int, __aout_VolumeGet, ( vlc_object_t *, audio_volume_t * ) );
#define aout_VolumeSet(a, b) __aout_VolumeSet(VLC_OBJECT(a), b)
VLC_EXPORT( int, __aout_VolumeSet, ( vlc_object_t *, audio_volume_t ) );
#define aout_VolumeInfos(a, b) __aout_VolumeInfos(VLC_OBJECT(a), b)
VLC_EXPORT( int, __aout_VolumeInfos, ( vlc_object_t *, audio_volume_t * ) );
#define aout_VolumeUp(a, b, c) __aout_VolumeUp(VLC_OBJECT(a), b, c)
VLC_EXPORT( int, __aout_VolumeUp, ( vlc_object_t *, int, audio_volume_t * ) );
#define aout_VolumeDown(a, b, c) __aout_VolumeDown(VLC_OBJECT(a), b, c)
VLC_EXPORT( int, __aout_VolumeDown, ( vlc_object_t *, int, audio_volume_t * ) );
#define aout_VolumeMute(a, b) __aout_VolumeMute(VLC_OBJECT(a), b)
VLC_EXPORT( int, __aout_VolumeMute, ( vlc_object_t *, audio_volume_t * ) );
VLC_EXPORT( int, aout_Restart, ( aout_instance_t * p_aout ) );
VLC_EXPORT( int, aout_FindAndRestart, ( vlc_object_t *, const char *, vlc_value_t, vlc_value_t, void * ) );
VLC_EXPORT( int, aout_ChannelsRestart, ( vlc_object_t *, const char *, vlc_value_t, vlc_value_t, void * ) );
#endif /* _VLC_AUDIO_OUTPUT_H */
Reference in New Issue View Git Blame Copy Permalink