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Add SDL_GetAudioDeviceSpec.

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This API is supported by pipewire, pulseaudio, coreaudio, wasapi, and disk.
This commit is contained in:
Ethan Lee
2021-02-27 17:37:25 -05:00
committed by Sam Lantinga
parent 00fabdde18
commit 67e8522d31
19 changed files with 256 additions and 67 deletions
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47
src/audio/pulseaudio/SDL_pulseaudio.c
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@@ -696,12 +696,45 @@ static SDL_Thread *hotplug_thread = NULL;
/* device handles are device index + 1, cast to void*, so we never pass a NULL. */
static SDL_AudioFormat
PulseFormatToSDLFormat(pa_sample_format_t format)
{
switch (format) {
case PA_SAMPLE_U8:
return AUDIO_U8;
case PA_SAMPLE_S16LE:
return AUDIO_S16LSB;
case PA_SAMPLE_S16BE:
return AUDIO_S16MSB;
case PA_SAMPLE_S32LE:
return AUDIO_S32LSB;
case PA_SAMPLE_S32BE:
return AUDIO_S32MSB;
case PA_SAMPLE_FLOAT32LE:
return AUDIO_F32LSB;
case PA_SAMPLE_FLOAT32BE:
return AUDIO_F32MSB;
default:
return 0;
}
}
/* This is called when PulseAudio adds an output ("sink") device. */
static void
SinkInfoCallback(pa_context *c, const pa_sink_info *i, int is_last, void *data)
{
SDL_AudioSpec spec;
if (i) {
SDL_AddAudioDevice(SDL_FALSE, i->description, (void *) ((size_t) i->index+1));
spec.freq = i->sample_spec.rate;
spec.channels = i->sample_spec.channels;
spec.format = PulseFormatToSDLFormat(i->sample_spec.format);
spec.silence = 0;
spec.samples = 0;
spec.size = 0;
spec.callback = NULL;
spec.userdata = NULL;
SDL_AddAudioDevice(SDL_FALSE, i->description, &spec, (void *) ((size_t) i->index+1));
}
}
@@ -709,10 +742,20 @@ SinkInfoCallback(pa_context *c, const pa_sink_info *i, int is_last, void *data)
static void
SourceInfoCallback(pa_context *c, const pa_source_info *i, int is_last, void *data)
{
SDL_AudioSpec spec;
if (i) {
/* Skip "monitor" sources. These are just output from other sinks. */
if (i->monitor_of_sink == PA_INVALID_INDEX) {
SDL_AddAudioDevice(SDL_TRUE, i->description, (void *) ((size_t) i->index+1));
spec.freq = i->sample_spec.rate;
spec.channels = i->sample_spec.channels;
spec.format = PulseFormatToSDLFormat(i->sample_spec.format);
spec.silence = 0;
spec.samples = 0;
spec.size = 0;
spec.callback = NULL;
spec.userdata = NULL;
SDL_AddAudioDevice(SDL_TRUE, i->description, &spec, (void *) ((size_t) i->index+1));
}
}
}