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![Kővágó, Zoltán](/assets/img/avatar_default.png)
This will make it possible to skip mixeng with audio playback and recording, allowing us to free ourselves from the limitations of the current mixeng (stereo, int64 samples only). In this case, HW and SW voices will be essentially the same, for every SW voice we will create a HW voice, since we can no longer mix multiple voices together. Some backends expect us to call a function when we have data ready write()/read() style, while others provide a buffer and expects us to directly write/read it, so for optimal performance audio_pcm_ops provide methods for both cases. Previously backends asked mixeng for more data in run_out/run_it, now instead mixeng or the frontends will call the backends, so that's why two sets of functions required. audio.c contains glue code between the two styles, so backends only ever have to implement one style and frontends are free to call whichever is more convenient for them. Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu@gmail.com> Message-id: 15a33c03a62228922d851f7324c52f73cb8d2414.1568927990.git.DirtY.iCE.hu@gmail.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
548 lines
13 KiB
C
548 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)(AudioState *s,
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struct audio_driver *drv)
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{
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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(__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(__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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g_free(hw->buf_emul);
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g_free (HWBUF);
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HWBUF = NULL;
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}
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static bool glue(audio_pcm_hw_alloc_resources_, TYPE)(HW *hw)
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{
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HWBUF = audio_calloc(__func__, hw->samples, sizeof(struct st_sample));
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if (!HWBUF) {
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dolog("Could not allocate " NAME " buffer (%zu samples)\n",
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hw->samples);
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return false;
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}
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return true;
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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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g_free (sw->buf);
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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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samples = ((int64_t) sw->hw->samples << 32) / sw->ratio;
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sw->buf = audio_calloc(__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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g_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 = g_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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g_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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g_free (sw->name);
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sw->name = NULL;
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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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HW *hw = *hwp;
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AudioState *s = hw->s;
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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 (hw->pcm_ops->fini_, TYPE) (hw);
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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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g_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)(AudioState *s, HW *hw)
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{
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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)(AudioState *s, HW *hw)
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{
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while ((hw = glue(audio_pcm_hw_find_any_, TYPE)(s, 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)(AudioState *s, HW *hw,
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struct audsettings *as)
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{
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while ((hw = glue(audio_pcm_hw_find_any_, TYPE)(s, 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)(AudioState *s,
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struct audsettings *as)
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{
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HW *hw;
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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(__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(__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(__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->s = s;
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hw->pcm_ops = drv->pcm_ops;
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hw->ctl_caps = drv->ctl_caps;
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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, s->drv_opaque)) {
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goto err0;
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}
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if (audio_bug(__func__, hw->samples <= 0)) {
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dolog("hw->samples=%zd\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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g_free (hw);
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return NULL;
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}
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AudiodevPerDirectionOptions *glue(audio_get_pdo_, TYPE)(Audiodev *dev)
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{
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switch (dev->driver) {
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case AUDIODEV_DRIVER_NONE:
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return dev->u.none.TYPE;
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case AUDIODEV_DRIVER_ALSA:
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return qapi_AudiodevAlsaPerDirectionOptions_base(dev->u.alsa.TYPE);
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case AUDIODEV_DRIVER_COREAUDIO:
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return qapi_AudiodevCoreaudioPerDirectionOptions_base(
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dev->u.coreaudio.TYPE);
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case AUDIODEV_DRIVER_DSOUND:
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return dev->u.dsound.TYPE;
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case AUDIODEV_DRIVER_OSS:
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return qapi_AudiodevOssPerDirectionOptions_base(dev->u.oss.TYPE);
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case AUDIODEV_DRIVER_PA:
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return qapi_AudiodevPaPerDirectionOptions_base(dev->u.pa.TYPE);
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case AUDIODEV_DRIVER_SDL:
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return dev->u.sdl.TYPE;
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case AUDIODEV_DRIVER_SPICE:
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return dev->u.spice.TYPE;
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case AUDIODEV_DRIVER_WAV:
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return dev->u.wav.TYPE;
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case AUDIODEV_DRIVER__MAX:
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break;
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}
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abort();
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}
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static HW *glue(audio_pcm_hw_add_, TYPE)(AudioState *s, struct audsettings *as)
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{
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HW *hw;
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AudiodevPerDirectionOptions *pdo = glue(audio_get_pdo_, TYPE)(s->dev);
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if (pdo->fixed_settings) {
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hw = glue(audio_pcm_hw_add_new_, TYPE)(s, 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)(s, 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)(s, 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)(s, NULL);
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}
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static SW *glue(audio_pcm_create_voice_pair_, TYPE)(
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AudioState *s,
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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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AudiodevPerDirectionOptions *pdo = glue(audio_get_pdo_, TYPE)(s->dev);
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if (pdo->fixed_settings) {
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hw_as = audiodev_to_audsettings(pdo);
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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(__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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sw->s = s;
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hw = glue(audio_pcm_hw_add_, TYPE)(s, &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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g_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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g_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(__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 = card->state;
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AudiodevPerDirectionOptions *pdo = glue(audio_get_pdo_, TYPE)(s->dev);
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if (audio_bug(__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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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(__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(__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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if (!pdo->fixed_settings && 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)(s, 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 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)
|
|
{
|
|
uint64_t delta, cur_ts, old_ts;
|
|
|
|
if (!sw) {
|
|
return 0;
|
|
}
|
|
|
|
cur_ts = sw->hw->ts_helper;
|
|
old_ts = ts->old_ts;
|
|
/* dolog ("cur %" PRId64 " old %" PRId64 "\n", cur_ts, old_ts); */
|
|
|
|
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
|