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CoreAudio plays synchronous

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This commit is contained in:
Johannes Pohl 2016-09-14 10:16:39 +02:00
parent 20ab3deedb
commit d196441f7c
2 changed files with 19 additions and 10 deletions
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28
client/player/coreAudioPlayer.cpp
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@ -17,11 +17,10 @@
***/
#include <unistd.h>
#include "coreAudioPlayer.h"
#define NUM_BUFFERS 2
//http://stackoverflow.com/questions/4863811/how-to-use-audioqueue-to-play-a-sound-for-mac-osx-in-c
//https://gist.github.com/andormade/1360885
@ -48,8 +47,15 @@ CoreAudioPlayer::~CoreAudioPlayer()
void CoreAudioPlayer::playerCallback(AudioQueueRef queue, AudioQueueBufferRef bufferRef)
{
//logO << "Callback\n";
chronos::usec delay(ms_ * 1000);
/// Estimate the playout delay by checking the number of frames left in the buffer
/// and add ms_ (= complete buffer size). Based on trying.
AudioTimeStamp timestamp;
AudioQueueGetCurrentTime(queue, timeLine, &timestamp, NULL);
size_t bufferedFrames = (frames_ - ((uint64_t)timestamp.mSampleTime % frames_)) % frames_;
size_t bufferedMs = bufferedFrames * 1000 / pubStream_->getFormat().rate + (ms_ * (NUM_BUFFERS - 1));
// logO << "buffered: " << bufferedFrames << ", ms: " << bufferedMs << ", mSampleTime: " << timestamp.mSampleTime << "\n";
chronos::usec delay(bufferedMs * 1000);
char *buffer = (char*)bufferRef->mAudioData;
if (!pubStream_->getPlayerChunk(buffer, delay, frames_))
{
@ -75,12 +81,9 @@ void CoreAudioPlayer::playerCallback(AudioQueueRef queue, AudioQueueBufferRef bu
void CoreAudioPlayer::worker()
{
AudioStreamBasicDescription format;
AudioQueueRef queue;
AudioQueueBufferRef buffers[2];
const SampleFormat& sampleFormat = pubStream_->getFormat();
AudioStreamBasicDescription format;
format.mSampleRate = sampleFormat.rate;
format.mFormatID = kAudioFormatLinearPCM;
format.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger;// | kAudioFormatFlagIsPacked;
@ -91,14 +94,17 @@ void CoreAudioPlayer::worker()
format.mBytesPerPacket = format.mBytesPerFrame * format.mFramesPerPacket;
format.mReserved = 0;
AudioQueueRef queue;
AudioQueueNewOutput(&format, callback, this, CFRunLoopGetCurrent(), kCFRunLoopCommonModes, 0, &queue);
AudioQueueCreateTimeline(queue, &timeLine);
frames_ = (sampleFormat.rate * ms_) / 1000;
ms_ = frames_ * 1000 / sampleFormat.rate;
logO << "frames: " << frames_ << ", ms: " << ms_ << "\n";
buff_size_ = frames_ * sampleFormat.frameSize;
for (int i = 0; i < 2; i++)
AudioQueueBufferRef buffers[NUM_BUFFERS];
for (int i = 0; i < NUM_BUFFERS; i++)
{
AudioQueueAllocateBuffer(queue, buff_size_, &buffers[i]);
buffers[i]->mAudioDataByteSize = buff_size_;
@ -106,7 +112,9 @@ void CoreAudioPlayer::worker()
}
logE << "CoreAudioPlayer::worker\n";
AudioQueueCreateTimeline(queue, &timeLine);
AudioQueueStart(queue, NULL);
CFRunLoopRun();
}