c/c++语言开发共享AudioQueue吃了我的缓冲区（前15毫秒）

我不熟悉iPhone音频API，但它似乎与其他通常会排队多个缓冲区的类似，这样当系统处理完第一个缓冲区时，它可以立即开始处理下一个缓冲区（因为它已经排队）正在执行第一个缓冲区上的完成回调。

就像是：

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 AudioQueueRef aq; AudioQueueBufferRef aq_buffer[2]; AudioStreamBasicDescription asbd; void aq_callback (void *aqData, AudioQueueRef inAQ, AudioQueueBufferRef inBuffer) { // note that the callback tells us which buffer has been completed, so all // we have to do is queue it back up OSStatus s = AudioQueueEnqueueBuffer(aq, inBuffer, 0, NULL); } void aq_init(void) { OSStatus s; asbd.mSampleRate = AUDIO_SAMPLES_PER_S; asbd.mFormatID = kAudioFormatLinearPCM; asbd.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked; asbd.mBytesPerPacket = 1; asbd.mFramesPerPacket = 1; asbd.mBytesPerFrame = 1; asbd.mChannelsPerFrame = 1; asbd.mBitsPerChannel = 8; asbd.mReserved = 0; int PPM_PACKETS_PER_SECOND = 50; // one buffer is as long as one PPM frame int BUFFER_SIZE_BYTES = asbd.mSampleRate/PPM_PACKETS_PER_SECOND*asbd.mBytesPerFrame; s = AudioQueueNewOutput(&asbd, aq_callback, NULL, CFRunLoopGetCurrent(), kCFRunLoopCommonModes, 0, &aq); s = AudioQueueAllocateBuffer(aq, BUFFER_SIZE_BYTES, &aq_buffer[0]); s = AudioQueueAllocateBuffer(aq, BUFFER_SIZE_BYTES, &aq_buffer[1]); // put samples in the buffer - fill both buffers buffer_data(my_data, aq_buffer[0]); buffer_data(my_data, aq_buffer[1]); s = AudioQueueStart(aq, NULL); s = AudioQueueEnqueueBuffer(aq, aq_buffer[0], 0, NULL); s = AudioQueueEnqueueBuffer(aq, aq_buffer[1], 0, NULL); }