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audio: Let emscripten update device->sample_frames at device open time.

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Fixes #11435.
This commit is contained in:
Ryan C. Gordon
2024-12-04 19:15:04 -05:00
parent 5bfece34f9
commit 9784e10a75
3 changed files with 7 additions and 3 deletions
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6
src/audio/SDL_audio.c
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@@ -144,7 +144,7 @@ const char *SDL_GetCurrentAudioDriver(void)
return current_audio.name;
}
static int GetDefaultSampleFramesFromFreq(const int freq)
int SDL_GetDefaultSampleFramesFromFreq(const int freq)
{
const char *hint = SDL_GetHint(SDL_HINT_AUDIO_DEVICE_SAMPLE_FRAMES);
if (hint) {
@@ -626,7 +626,7 @@ static SDL_AudioDevice *CreatePhysicalAudioDevice(const char *name, bool recordi
device->recording = recording;
SDL_copyp(&device->spec, spec);
SDL_copyp(&device->default_spec, spec);
device->sample_frames = GetDefaultSampleFramesFromFreq(device->spec.freq);
device->sample_frames = SDL_GetDefaultSampleFramesFromFreq(device->spec.freq);
device->silence_value = SDL_GetSilenceValueForFormat(device->spec.format);
device->handle = handle;
@@ -1666,7 +1666,7 @@ static bool OpenPhysicalAudioDevice(SDL_AudioDevice *device, const SDL_AudioSpec
device->spec.format = (SDL_AUDIO_BITSIZE(device->default_spec.format) >= SDL_AUDIO_BITSIZE(spec.format)) ? device->default_spec.format : spec.format;
device->spec.freq = SDL_max(device->default_spec.freq, spec.freq);
device->spec.channels = SDL_max(device->default_spec.channels, spec.channels);
device->sample_frames = GetDefaultSampleFramesFromFreq(device->spec.freq);
device->sample_frames = SDL_GetDefaultSampleFramesFromFreq(device->spec.freq);
SDL_UpdatedAudioDeviceFormat(device); // start this off sane.
device->currently_opened = true; // mark this true even if impl.OpenDevice fails, so we know to clean up.

3
src/audio/SDL_sysaudio.h
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@@ -91,6 +91,9 @@ extern SDL_AudioDevice *SDL_FindPhysicalAudioDeviceByCallback(bool (*callback)(S
// Backends should call this if they change the device format, channels, freq, or sample_frames to keep other state correct.
extern void SDL_UpdatedAudioDeviceFormat(SDL_AudioDevice *device);
// Backends can call this to get a reasonable default sample frame count for a device's sample rate.
int SDL_GetDefaultSampleFramesFromFreq(const int freq);
// Backends can call this to get a standardized name for a thread to power a specific audio device.
extern char *SDL_GetAudioThreadName(SDL_AudioDevice *device, char *buf, size_t buflen);

1
src/audio/emscripten/SDL_emscriptenaudio.c
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@@ -190,6 +190,7 @@ static bool EMSCRIPTENAUDIO_OpenDevice(SDL_AudioDevice *device)
// limit to native freq
device->spec.freq = EM_ASM_INT({ return Module['SDL3'].audioContext.sampleRate; });
device->sample_frames = SDL_GetDefaultSampleFramesFromFreq(device->spec.freq);
SDL_UpdatedAudioDeviceFormat(device);