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raised buffer to hold 100ms

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This commit is contained in:
Johannes Pohl 2016-09-21 17:03:37 +02:00
parent f423bc0fc0
commit 6744169442
1 changed files with 9 additions and 2 deletions
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11
client/player/coreAudioPlayer.cpp
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@ -34,7 +34,7 @@ void callback(void *custom_data, AudioQueueRef queue, AudioQueueBufferRef buffer
CoreAudioPlayer::CoreAudioPlayer(const PcmDevice& pcmDevice, Stream* stream) :
Player(pcmDevice, stream),
ms_(50),
ms_(100),
pubStream_(stream)
{
}
@ -100,10 +100,17 @@ void CoreAudioPlayer::worker()
AudioQueueNewOutput(&format, callback, this, CFRunLoopGetCurrent(), kCFRunLoopCommonModes, 0, &queue);
AudioQueueCreateTimeline(queue, &timeLine);
// Apple recommends this as buffer size:
// https://developer.apple.com/library/content/documentation/MusicAudio/Conceptual/CoreAudioOverview/CoreAudioEssentials/CoreAudioEssentials.html
// static const int maxBufferSize = 0x10000; // limit maximum size to 64K
// static const int minBufferSize = 0x4000; // limit minimum size to 16K
//
// For 100ms @ 48000:16:2 we have 19.2K
// frames: 4800, ms: 100, buffer size: 19200
frames_ = (sampleFormat.rate * ms_) / 1000;
ms_ = frames_ * 1000 / sampleFormat.rate;
logO << "frames: " << frames_ << ", ms: " << ms_ << "\n";
buff_size_ = frames_ * sampleFormat.frameSize;
logO << "frames: " << frames_ << ", ms: " << ms_ << ", buffer size: " << buff_size_ << "\n";
AudioQueueBufferRef buffers[NUM_BUFFERS];
for (int i = 0; i < NUM_BUFFERS; i++)