mirror/miniaudio
1
0
Fork 0
mirror of https://github.com/mackron/miniaudio.git synced 2026-04-22 00:06:59 +02:00
Code Issues Packages Projects Releases Wiki Activity

Yet more tweaks to the Core Audio backend.

Browse Source
This commit is contained in:
David Reid
2018-06-30 22:40:43 +10:00
parent 9af45f3b82
commit 08bf805495
1 changed files with 6 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
mini_al.h
+6 -5
View File
@@ -13870,7 +13870,7 @@ mal_result mal_device_init__coreaudio(mal_context* pContext, mal_device_type dev
}
// Backend tax. Need to fiddle with this.
float fBackend = 0.5f;
float fBackend = 1.0f;
actualBufferSizeInFrames = mal_calculate_default_buffer_size_in_frames(pConfig->performanceProfile, pConfig->sampleRate, fCPUSpeed*fDeviceType*fBackend);
if (actualBufferSizeInFrames < pDevice->periods) {
@@ -13879,19 +13879,20 @@ mal_result mal_device_init__coreaudio(mal_context* pContext, mal_device_type dev
}
actualBufferSizeInFrames = actualBufferSizeInFrames / pDevice->periods;
// In my testing, it appears that Core Audio likes queue buffers to be larger than device's IO buffer which was set above. We're going to make
// the size of the queue buffers twice the size of the device's IO buffer.
actualBufferSizeInFrames = actualBufferSizeInFrames / pDevice->periods / 2;
result = mal_set_AudioObject_buffer_size_in_frames(deviceObjectID, deviceType, &actualBufferSizeInFrames);
if (result != MAL_SUCCESS) {
return result;
}
mal_uint32 queueBufferSizeInFrames = actualBufferSizeInFrames * 2;
// The audio queue is initialized in the worker thread.
mal_AudioQueue_worker_thread_data__coreaudio threadData;
threadData.pDevice = pDevice;
// In my testing, it appears that Core Audio likes queue buffers to be larger than device's IO buffer which was set above.
threadData.queueBufferSizeInBytes = actualBufferSizeInFrames*2 * mal_get_bytes_per_frame(pDevice->internalFormat, pDevice->internalChannels);
threadData.queueBufferSizeInBytes = queueBufferSizeInFrames * mal_get_bytes_per_frame(pDevice->internalFormat, pDevice->internalChannels);
// We need a signal to know when the thread has been initialized.
mal_event_init(pDevice->pContext, &threadData.initCompletionEvent);