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audio: Readded (logical) device pausing.

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This commit is contained in:
Ryan C. Gordon
2023-06-22 00:59:26 -04:00
parent fd4c9f4e11
commit 01f7b53865
6 changed files with 134 additions and 3 deletions
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40
src/audio/SDL_audio.c
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@@ -603,7 +603,12 @@ SDL_bool SDL_OutputAudioThreadIterate(SDL_AudioDevice *device)
} else {
SDL_assert(buffer_size <= device->buffer_size); // you can ask for less, but not more.
SDL_memset(mix_buffer, device->silence_value, buffer_size); // start with silence.
for (SDL_LogicalAudioDevice *logdev = device->logical_devices; logdev != NULL; logdev = logdev->next) {
if (SDL_AtomicGet(&logdev->paused)) {
continue; // paused? Skip this logical device.
}
for (SDL_AudioStream *stream = logdev->bound_streams; stream != NULL; stream = stream->next_binding) {
/* this will hold a lock on `stream` while getting. We don't explicitly lock the streams
for iterating here because the binding linked list can only change while the device lock is held.
@@ -1165,6 +1170,41 @@ SDL_AudioDeviceID SDL_OpenAudioDevice(SDL_AudioDeviceID devid, const SDL_AudioSp
return retval;
}
static int SetLogicalAudioDevicePauseState(SDL_AudioDeviceID devid, int value)
{
SDL_LogicalAudioDevice *logdev = ObtainLogicalAudioDevice(devid);
if (!logdev) {
return -1; // ObtainLogicalAudioDevice will have set an error.
}
SDL_AtomicSet(&logdev->paused, value);
SDL_UnlockMutex(logdev->physical_device->lock);
return 0;
}
int SDL_PauseAudioDevice(SDL_AudioDeviceID devid)
{
return SetLogicalAudioDevicePauseState(devid, 1);
}
int SDLCALL SDL_UnpauseAudioDevice(SDL_AudioDeviceID devid)
{
return SetLogicalAudioDevicePauseState(devid, 0);
}
SDL_bool SDL_IsAudioDevicePaused(SDL_AudioDeviceID devid)
{
SDL_LogicalAudioDevice *logdev = ObtainLogicalAudioDevice(devid);
SDL_bool retval = SDL_FALSE;
if (logdev) {
if (SDL_AtomicGet(&logdev->paused)) {
retval = SDL_TRUE;
}
SDL_UnlockMutex(logdev->physical_device->lock);
}
return retval;
}
int SDL_BindAudioStreams(SDL_AudioDeviceID devid, SDL_AudioStream **streams, int num_streams)
{
const SDL_bool islogical = (devid & (1<<1)) ? SDL_FALSE : SDL_TRUE;