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https://github.com/qemu/qemu.git
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565 lines
13 KiB
C
565 lines
13 KiB
C
/*
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* QEMU Audio subsystem header
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*
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* Copyright (c) 2005 Vassili Karpov (malc)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifdef DAC
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#define NAME "playback"
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#define HWBUF hw->mix_buf
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#define TYPE out
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#define HW HWVoiceOut
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#define SW SWVoiceOut
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#else
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#define NAME "capture"
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#define TYPE in
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#define HW HWVoiceIn
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#define SW SWVoiceIn
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#define HWBUF hw->conv_buf
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#endif
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static void glue (audio_init_nb_voices_, TYPE) (struct audio_driver *drv)
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{
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AudioState *s = &glob_audio_state;
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int max_voices = glue (drv->max_voices_, TYPE);
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int voice_size = glue (drv->voice_size_, TYPE);
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if (glue (s->nb_hw_voices_, TYPE) > max_voices) {
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if (!max_voices) {
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#ifdef DAC
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dolog ("Driver `%s' does not support " NAME "\n", drv->name);
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#endif
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}
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else {
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dolog ("Driver `%s' does not support %d " NAME " voices, max %d\n",
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drv->name,
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glue (s->nb_hw_voices_, TYPE),
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max_voices);
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}
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glue (s->nb_hw_voices_, TYPE) = max_voices;
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}
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if (audio_bug (AUDIO_FUNC, !voice_size && max_voices)) {
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dolog ("drv=`%s' voice_size=0 max_voices=%d\n",
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drv->name, max_voices);
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glue (s->nb_hw_voices_, TYPE) = 0;
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}
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if (audio_bug (AUDIO_FUNC, voice_size && !max_voices)) {
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dolog ("drv=`%s' voice_size=%d max_voices=0\n",
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drv->name, voice_size);
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}
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}
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static void glue (audio_pcm_hw_free_resources_, TYPE) (HW *hw)
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{
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if (HWBUF) {
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qemu_free (HWBUF);
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}
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HWBUF = NULL;
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}
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static int glue (audio_pcm_hw_alloc_resources_, TYPE) (HW *hw)
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{
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HWBUF = audio_calloc (AUDIO_FUNC, hw->samples, sizeof (struct st_sample));
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if (!HWBUF) {
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dolog ("Could not allocate " NAME " buffer (%d samples)\n",
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hw->samples);
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return -1;
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}
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return 0;
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}
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static void glue (audio_pcm_sw_free_resources_, TYPE) (SW *sw)
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{
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if (sw->buf) {
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qemu_free (sw->buf);
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}
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if (sw->rate) {
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st_rate_stop (sw->rate);
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}
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sw->buf = NULL;
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sw->rate = NULL;
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}
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static int glue (audio_pcm_sw_alloc_resources_, TYPE) (SW *sw)
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{
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int samples;
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#ifdef DAC
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samples = sw->hw->samples;
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#else
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samples = ((int64_t) sw->hw->samples << 32) / sw->ratio;
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#endif
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sw->buf = audio_calloc (AUDIO_FUNC, samples, sizeof (struct st_sample));
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if (!sw->buf) {
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dolog ("Could not allocate buffer for `%s' (%d samples)\n",
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SW_NAME (sw), samples);
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return -1;
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}
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#ifdef DAC
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sw->rate = st_rate_start (sw->info.freq, sw->hw->info.freq);
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#else
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sw->rate = st_rate_start (sw->hw->info.freq, sw->info.freq);
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#endif
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if (!sw->rate) {
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qemu_free (sw->buf);
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sw->buf = NULL;
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return -1;
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}
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return 0;
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}
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static int glue (audio_pcm_sw_init_, TYPE) (
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SW *sw,
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HW *hw,
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const char *name,
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struct audsettings *as
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)
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{
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int err;
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audio_pcm_init_info (&sw->info, as);
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sw->hw = hw;
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sw->active = 0;
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#ifdef DAC
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sw->ratio = ((int64_t) sw->hw->info.freq << 32) / sw->info.freq;
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sw->total_hw_samples_mixed = 0;
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sw->empty = 1;
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#else
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sw->ratio = ((int64_t) sw->info.freq << 32) / sw->hw->info.freq;
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#endif
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#ifdef DAC
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sw->conv = mixeng_conv
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#else
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sw->clip = mixeng_clip
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#endif
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[sw->info.nchannels == 2]
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[sw->info.sign]
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[sw->info.swap_endianness]
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[audio_bits_to_index (sw->info.bits)];
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sw->name = qemu_strdup (name);
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err = glue (audio_pcm_sw_alloc_resources_, TYPE) (sw);
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if (err) {
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qemu_free (sw->name);
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sw->name = NULL;
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}
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return err;
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}
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static void glue (audio_pcm_sw_fini_, TYPE) (SW *sw)
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{
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glue (audio_pcm_sw_free_resources_, TYPE) (sw);
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if (sw->name) {
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qemu_free (sw->name);
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sw->name = NULL;
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}
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}
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static void glue (audio_pcm_hw_add_sw_, TYPE) (HW *hw, SW *sw)
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{
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QLIST_INSERT_HEAD (&hw->sw_head, sw, entries);
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}
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static void glue (audio_pcm_hw_del_sw_, TYPE) (SW *sw)
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{
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QLIST_REMOVE (sw, entries);
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}
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static void glue (audio_pcm_hw_gc_, TYPE) (HW **hwp)
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{
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AudioState *s = &glob_audio_state;
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HW *hw = *hwp;
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if (!hw->sw_head.lh_first) {
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#ifdef DAC
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audio_detach_capture (hw);
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#endif
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QLIST_REMOVE (hw, entries);
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glue (s->nb_hw_voices_, TYPE) += 1;
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glue (audio_pcm_hw_free_resources_ ,TYPE) (hw);
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glue (hw->pcm_ops->fini_, TYPE) (hw);
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qemu_free (hw);
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*hwp = NULL;
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}
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}
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static HW *glue (audio_pcm_hw_find_any_, TYPE) (HW *hw)
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{
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AudioState *s = &glob_audio_state;
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return hw ? hw->entries.le_next : glue (s->hw_head_, TYPE).lh_first;
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}
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static HW *glue (audio_pcm_hw_find_any_enabled_, TYPE) (HW *hw)
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{
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while ((hw = glue (audio_pcm_hw_find_any_, TYPE) (hw))) {
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if (hw->enabled) {
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return hw;
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}
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}
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return NULL;
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}
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static HW *glue (audio_pcm_hw_find_specific_, TYPE) (
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HW *hw,
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struct audsettings *as
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)
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{
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while ((hw = glue (audio_pcm_hw_find_any_, TYPE) (hw))) {
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if (audio_pcm_info_eq (&hw->info, as)) {
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return hw;
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}
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}
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return NULL;
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}
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static HW *glue (audio_pcm_hw_add_new_, TYPE) (struct audsettings *as)
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{
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HW *hw;
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AudioState *s = &glob_audio_state;
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struct audio_driver *drv = s->drv;
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if (!glue (s->nb_hw_voices_, TYPE)) {
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return NULL;
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}
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if (audio_bug (AUDIO_FUNC, !drv)) {
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dolog ("No host audio driver\n");
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return NULL;
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}
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if (audio_bug (AUDIO_FUNC, !drv->pcm_ops)) {
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dolog ("Host audio driver without pcm_ops\n");
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return NULL;
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}
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hw = audio_calloc (AUDIO_FUNC, 1, glue (drv->voice_size_, TYPE));
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if (!hw) {
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dolog ("Can not allocate voice `%s' size %d\n",
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drv->name, glue (drv->voice_size_, TYPE));
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return NULL;
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}
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hw->pcm_ops = drv->pcm_ops;
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QLIST_INIT (&hw->sw_head);
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#ifdef DAC
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QLIST_INIT (&hw->cap_head);
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#endif
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if (glue (hw->pcm_ops->init_, TYPE) (hw, as)) {
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goto err0;
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}
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if (audio_bug (AUDIO_FUNC, hw->samples <= 0)) {
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dolog ("hw->samples=%d\n", hw->samples);
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goto err1;
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}
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#ifdef DAC
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hw->clip = mixeng_clip
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#else
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hw->conv = mixeng_conv
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#endif
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[hw->info.nchannels == 2]
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[hw->info.sign]
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[hw->info.swap_endianness]
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[audio_bits_to_index (hw->info.bits)];
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if (glue (audio_pcm_hw_alloc_resources_, TYPE) (hw)) {
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goto err1;
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}
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QLIST_INSERT_HEAD (&s->glue (hw_head_, TYPE), hw, entries);
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glue (s->nb_hw_voices_, TYPE) -= 1;
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#ifdef DAC
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audio_attach_capture (hw);
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#endif
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return hw;
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err1:
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glue (hw->pcm_ops->fini_, TYPE) (hw);
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err0:
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qemu_free (hw);
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return NULL;
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}
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static HW *glue (audio_pcm_hw_add_, TYPE) (struct audsettings *as)
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{
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HW *hw;
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if (glue (conf.fixed_, TYPE).enabled && glue (conf.fixed_, TYPE).greedy) {
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hw = glue (audio_pcm_hw_add_new_, TYPE) (as);
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if (hw) {
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return hw;
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}
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}
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hw = glue (audio_pcm_hw_find_specific_, TYPE) (NULL, as);
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if (hw) {
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return hw;
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}
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hw = glue (audio_pcm_hw_add_new_, TYPE) (as);
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if (hw) {
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return hw;
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}
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return glue (audio_pcm_hw_find_any_, TYPE) (NULL);
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}
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static SW *glue (audio_pcm_create_voice_pair_, TYPE) (
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const char *sw_name,
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struct audsettings *as
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)
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{
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SW *sw;
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HW *hw;
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struct audsettings hw_as;
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if (glue (conf.fixed_, TYPE).enabled) {
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hw_as = glue (conf.fixed_, TYPE).settings;
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}
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else {
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hw_as = *as;
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}
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sw = audio_calloc (AUDIO_FUNC, 1, sizeof (*sw));
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if (!sw) {
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dolog ("Could not allocate soft voice `%s' (%zu bytes)\n",
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sw_name ? sw_name : "unknown", sizeof (*sw));
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goto err1;
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}
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hw = glue (audio_pcm_hw_add_, TYPE) (&hw_as);
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if (!hw) {
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goto err2;
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}
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glue (audio_pcm_hw_add_sw_, TYPE) (hw, sw);
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if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, sw_name, as)) {
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goto err3;
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}
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return sw;
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err3:
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glue (audio_pcm_hw_del_sw_, TYPE) (sw);
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glue (audio_pcm_hw_gc_, TYPE) (&hw);
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err2:
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qemu_free (sw);
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err1:
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return NULL;
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}
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static void glue (audio_close_, TYPE) (SW *sw)
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{
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glue (audio_pcm_sw_fini_, TYPE) (sw);
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glue (audio_pcm_hw_del_sw_, TYPE) (sw);
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glue (audio_pcm_hw_gc_, TYPE) (&sw->hw);
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qemu_free (sw);
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}
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void glue (AUD_close_, TYPE) (QEMUSoundCard *card, SW *sw)
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{
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if (sw) {
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if (audio_bug (AUDIO_FUNC, !card)) {
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dolog ("card=%p\n", card);
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return;
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}
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glue (audio_close_, TYPE) (sw);
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}
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}
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SW *glue (AUD_open_, TYPE) (
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QEMUSoundCard *card,
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SW *sw,
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const char *name,
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void *callback_opaque ,
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audio_callback_fn callback_fn,
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struct audsettings *as
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)
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{
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AudioState *s = &glob_audio_state;
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#ifdef DAC
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int live = 0;
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SW *old_sw = NULL;
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#endif
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ldebug ("open %s, freq %d, nchannels %d, fmt %d\n",
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name, as->freq, as->nchannels, as->fmt);
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if (audio_bug (AUDIO_FUNC, !card || !name || !callback_fn || !as)) {
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dolog ("card=%p name=%p callback_fn=%p as=%p\n",
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card, name, callback_fn, as);
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goto fail;
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}
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if (audio_bug (AUDIO_FUNC, audio_validate_settings (as))) {
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audio_print_settings (as);
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goto fail;
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}
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if (audio_bug (AUDIO_FUNC, !s->drv)) {
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dolog ("Can not open `%s' (no host audio driver)\n", name);
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goto fail;
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}
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if (sw && audio_pcm_info_eq (&sw->info, as)) {
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return sw;
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}
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#ifdef DAC
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if (conf.plive && sw && (!sw->active && !sw->empty)) {
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live = sw->total_hw_samples_mixed;
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#ifdef DEBUG_PLIVE
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dolog ("Replacing voice %s with %d live samples\n", SW_NAME (sw), live);
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dolog ("Old %s freq %d, bits %d, channels %d\n",
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SW_NAME (sw), sw->info.freq, sw->info.bits, sw->info.nchannels);
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dolog ("New %s freq %d, bits %d, channels %d\n",
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name,
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as->freq,
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(as->fmt == AUD_FMT_S16 || as->fmt == AUD_FMT_U16) ? 16 : 8,
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as->nchannels);
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#endif
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if (live) {
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old_sw = sw;
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old_sw->callback.fn = NULL;
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sw = NULL;
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}
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}
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#endif
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if (!glue (conf.fixed_, TYPE).enabled && sw) {
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glue (AUD_close_, TYPE) (card, sw);
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sw = NULL;
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}
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if (sw) {
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HW *hw = sw->hw;
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if (!hw) {
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dolog ("Internal logic error voice `%s' has no hardware store\n",
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SW_NAME (sw));
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goto fail;
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}
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glue (audio_pcm_sw_fini_, TYPE) (sw);
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if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, name, as)) {
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goto fail;
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}
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}
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else {
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sw = glue (audio_pcm_create_voice_pair_, TYPE) (name, as);
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if (!sw) {
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dolog ("Failed to create voice `%s'\n", name);
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return NULL;
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}
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}
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sw->card = card;
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sw->vol = nominal_volume;
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sw->callback.fn = callback_fn;
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sw->callback.opaque = callback_opaque;
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#ifdef DAC
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if (live) {
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int mixed =
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(live << old_sw->info.shift)
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* old_sw->info.bytes_per_second
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/ sw->info.bytes_per_second;
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#ifdef DEBUG_PLIVE
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dolog ("Silence will be mixed %d\n", mixed);
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#endif
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sw->total_hw_samples_mixed += mixed;
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}
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#endif
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#ifdef DEBUG_AUDIO
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dolog ("%s\n", name);
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audio_pcm_print_info ("hw", &sw->hw->info);
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audio_pcm_print_info ("sw", &sw->info);
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#endif
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return sw;
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fail:
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glue (AUD_close_, TYPE) (card, sw);
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return NULL;
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}
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int glue (AUD_is_active_, TYPE) (SW *sw)
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{
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return sw ? sw->active : 0;
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}
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void glue (AUD_init_time_stamp_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
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{
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if (!sw) {
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return;
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}
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ts->old_ts = sw->hw->ts_helper;
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}
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uint64_t glue (AUD_get_elapsed_usec_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
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{
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uint64_t delta, cur_ts, old_ts;
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if (!sw) {
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return 0;
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}
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cur_ts = sw->hw->ts_helper;
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old_ts = ts->old_ts;
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/* dolog ("cur %" PRId64 " old %" PRId64 "\n", cur_ts, old_ts); */
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|
|
if (cur_ts >= old_ts) {
|
|
delta = cur_ts - old_ts;
|
|
}
|
|
else {
|
|
delta = UINT64_MAX - old_ts + cur_ts;
|
|
}
|
|
|
|
if (!delta) {
|
|
return 0;
|
|
}
|
|
|
|
return muldiv64 (delta, sw->hw->info.freq, 1000000);
|
|
}
|
|
|
|
#undef TYPE
|
|
#undef HW
|
|
#undef SW
|
|
#undef HWBUF
|
|
#undef NAME
|