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[SDL][IOS] Audio fix - applies stream to sound data when resampling or reformatting is required.

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This commit is contained in:
Sam Lantinga 2019-08-22 16:09:42 -07:00
parent 5c15e81cfb
commit b521df66c3
2 changed files with 29 additions and 1 deletions
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0
Xcode-iOS/SDL/SDL.xcodeproj/project.pbxproj Normal file → Executable file
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30
src/audio/coreaudio/SDL_coreaudio.m
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@ -417,7 +417,35 @@ outputCallback(void *inUserData, AudioQueueRef inAQ, AudioQueueBufferRef inBuffe
if (!SDL_AtomicGet(&this->enabled) || SDL_AtomicGet(&this->paused)) { if (!SDL_AtomicGet(&this->enabled) || SDL_AtomicGet(&this->paused)) {
/* Supply silence if audio is not enabled or paused */ /* Supply silence if audio is not enabled or paused */
SDL_memset(inBuffer->mAudioData, this->spec.silence, inBuffer->mAudioDataBytesCapacity); SDL_memset(inBuffer->mAudioData, this->spec.silence, inBuffer->mAudioDataBytesCapacity);
} else { } else if (this->stream ) {
UInt32 remaining = inBuffer->mAudioDataBytesCapacity;
Uint8 *ptr = (Uint8 *) inBuffer->mAudioData;
while (remaining > 0) {
if ( SDL_AudioStreamAvailable(this->stream) == 0 ) {
/* Generate the data */
SDL_LockMutex(this->mixer_lock);
(*this->callbackspec.callback)(this->callbackspec.userdata,
this->hidden->buffer, this->hidden->bufferSize);
SDL_UnlockMutex(this->mixer_lock);
this->hidden->bufferOffset = 0;
SDL_AudioStreamPut(this->stream, this->hidden->buffer, this->hidden->bufferSize);
}
if ( SDL_AudioStreamAvailable(this->stream) > 0 ) {
int got;
UInt32 len = SDL_AudioStreamAvailable(this->stream);
if ( len > remaining )
len = remaining;
got = SDL_AudioStreamGet(this->stream, ptr, len);
SDL_assert((got < 0) || (got == len));
if (got != len) {
SDL_memset(ptr, this->spec.silence, len);
}
ptr = ptr + len;
remaining -= len;
}
}
} else {
UInt32 remaining = inBuffer->mAudioDataBytesCapacity; UInt32 remaining = inBuffer->mAudioDataBytesCapacity;
Uint8 *ptr = (Uint8 *) inBuffer->mAudioData; Uint8 *ptr = (Uint8 *) inBuffer->mAudioData;