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coreaudio: we don't need to track number of allocated audio buffers anymore.

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CoreAudio takes care of iterating through the buffers and freeing them now,
so we don't have to manage this ourselves.
This commit is contained in:
Ryan C. Gordon 2017-05-24 13:28:13 -04:00
parent fc4402e5ff
commit 6844d92c23
2 changed files with 6 additions and 8 deletions
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1
src/audio/coreaudio/SDL_coreaudio.h
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@ -47,7 +47,6 @@ struct SDL_PrivateAudioData
{ {
SDL_Thread *thread; SDL_Thread *thread;
AudioQueueRef audioQueue; AudioQueueRef audioQueue;
int numAudioBuffers;
AudioQueueBufferRef *audioBuffer; AudioQueueBufferRef *audioBuffer;
void *buffer; void *buffer;
UInt32 bufferOffset; UInt32 bufferOffset;

13
src/audio/coreaudio/SDL_coreaudio.m
View File

@ -667,23 +667,22 @@ prepare_audioqueue(_THIS)
/* Make sure we can feed the device at least 50 milliseconds at a time. */ /* Make sure we can feed the device at least 50 milliseconds at a time. */
const double msecs = (this->spec.samples / ((double) this->spec.freq)) * 1000.0; const double msecs = (this->spec.samples / ((double) this->spec.freq)) * 1000.0;
if (msecs >= 10.0) { int numAudioBuffers = 2;
this->hidden->numAudioBuffers = 2; if (msecs < 10.0) { /* use more buffers if we have a VERY small sample set. */
} else { numAudioBuffers = (int) (SDL_ceil(10.0 / msecs) * 2);
this->hidden->numAudioBuffers = (int) (SDL_ceil(10.0 / msecs) * 2);
} }
this->hidden->audioBuffer = SDL_calloc(1, sizeof (AudioQueueBufferRef) * this->hidden->numAudioBuffers); this->hidden->audioBuffer = SDL_calloc(1, sizeof (AudioQueueBufferRef) * numAudioBuffers);
if (this->hidden->audioBuffer == NULL) { if (this->hidden->audioBuffer == NULL) {
SDL_OutOfMemory(); SDL_OutOfMemory();
return 0; return 0;
} }
#if DEBUG_COREAUDIO #if DEBUG_COREAUDIO
printf("COREAUDIO: numAudioBuffers == %d\n", this->hidden->numAudioBuffers); printf("COREAUDIO: numAudioBuffers == %d\n", numAudioBuffers);
#endif #endif
for (i = 0; i < this->hidden->numAudioBuffers; i++) { for (i = 0; i < numAudioBuffers; i++) {
result = AudioQueueAllocateBuffer(this->hidden->audioQueue, this->spec.size, &this->hidden->audioBuffer[i]); result = AudioQueueAllocateBuffer(this->hidden->audioQueue, this->spec.size, &this->hidden->audioBuffer[i]);
CHECK_RESULT("AudioQueueAllocateBuffer"); CHECK_RESULT("AudioQueueAllocateBuffer");
SDL_memset(this->hidden->audioBuffer[i]->mAudioData, this->spec.silence, this->hidden->audioBuffer[i]->mAudioDataBytesCapacity); SDL_memset(this->hidden->audioBuffer[i]->mAudioData, this->spec.silence, this->hidden->audioBuffer[i]->mAudioDataBytesCapacity);