Rockbox open source high quality audio player as a Music Player Daemon
mpris
rockbox
mpd
libadwaita
audio
rust
zig
deno
pcm_mixer: implement mixer_switch_sink
Change-Id: I1549470774f96a6f470817cbc5fe4611812de6fa
+68
-47
+4
firmware/export/pcm_mixer.h
+4
firmware/export/pcm_mixer.h
···
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#define PCM_MIXER_H
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#include <sys/types.h>
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#include "pcm_sink.h"
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/** Simple config **/
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···
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/* Stop playback on a channel */
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void mixer_channel_stop(enum pcm_mixer_channel channel);
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/* Switch playback sink */
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bool mixer_switch_sink(enum pcm_sink_ids sink);
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/* Set channel's amplitude factor */
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void mixer_channel_set_amplitude(enum pcm_mixer_channel channel,
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-47
firmware/pcm_mixer.c
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-47
firmware/pcm_mixer.c
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start, mix_frame_size);
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}
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/* Notify users of samplerate change */
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static void mixer_handle_sampr_change(unsigned int sampr)
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{
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for (size_t i = 0; i < ARRAYLEN(active_channels) && active_channels[i]; i += 1)
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{
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struct mixer_channel* chan = active_channels[i];
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/* Notify upstreams */
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if (chan->play_cbs)
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{
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if (chan->play_cbs->sampr_changed)
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{
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chan->play_cbs->sampr_changed(sampr);
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}
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if (chan->play_cbs->get_more)
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{
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/* Remake buffer */
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const void *start = NULL;
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size_t size;
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chan->play_cbs->get_more(&start, &size);
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if (start && size) {
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chan->start = start;
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chan->size = size;
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chan->last_size = 0;
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} else {
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channel_stopped(chan);
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}
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}
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}
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/* Notify buffer monitor */
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if (chan->buf_cbs)
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{
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if (chan->buf_cbs->sampr_changed)
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{
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chan->buf_cbs->sampr_changed(sampr);
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}
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}
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}
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/* Work out how much space we really need */
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if (sampr > SAMPR_96)
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mix_frame_size = 4;
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else if (sampr > SAMPR_48)
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mix_frame_size = 2;
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else
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mix_frame_size = 1;
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mix_frame_size *= MIX_FRAME_SAMPLES * 4;
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}
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/** Public interfaces **/
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/* Start playback on a channel */
···
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pcm_play_unlock();
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}
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/* Switch playback sink */
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bool mixer_switch_sink(enum pcm_sink_ids sink)
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{
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if(pcm_current_sink() == sink)
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return true;
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if(!pcm_switch_sink(sink))
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return false;
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mixer_handle_sampr_change(SAMPR_NUM(pcm_get_frequency()));
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return true;
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}
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/* Set channel's amplitude factor */
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void mixer_channel_set_amplitude(enum pcm_mixer_channel channel,
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unsigned int amplitude)
···
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return;
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pcm_set_frequency(samplerate);
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for (size_t i = 0; i < ARRAYLEN(active_channels) && active_channels[i]; i += 1)
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{
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struct mixer_channel* chan = active_channels[i];
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/* Notify upstreams */
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if (chan->play_cbs)
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{
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if (chan->play_cbs->sampr_changed)
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{
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chan->play_cbs->sampr_changed(SAMPR_NUM(samplerate));
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}
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if (chan->play_cbs->get_more)
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{
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/* Remake buffer */
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const void *start = NULL;
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size_t size;
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chan->play_cbs->get_more(&start, &size);
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if (start && size) {
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chan->start = start;
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chan->size = size;
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chan->last_size = 0;
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} else {
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channel_stopped(chan);
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}
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}
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}
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/* Notify buffer monitor */
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if (chan->buf_cbs)
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{
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if (chan->buf_cbs->sampr_changed)
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{
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chan->buf_cbs->sampr_changed(SAMPR_NUM(samplerate));
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}
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}
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}
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/* Work out how much space we really need */
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if (SAMPR_NUM(samplerate) > SAMPR_96)
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mix_frame_size = 4;
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else if (SAMPR_NUM(samplerate) > SAMPR_48)
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mix_frame_size = 2;
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else
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mix_frame_size = 1;
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mix_frame_size *= MIX_FRAME_SAMPLES * 4;
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mixer_handle_sampr_change(SAMPR_NUM(pcm_get_frequency()));
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if (pcm_is_initialized())
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pcm_apply_settings();
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}