iOS AudioQueue 深入解析-优快云博客

本文链接：https://blog.youkuaiyun.com/iOSZZZh/article/details/105566760

本文详细探讨了iOS平台上的AudioQueue服务，包括其工作原理、使用场景和核心API，帮助开发者深入了解音频处理技术。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

//========================= 播放 ==============================

// 所属类 AudioPlayer
AudioQueueRef mQueue;
AudioStreamBasicDescription mDataFormat;

//创建AudioQueue
AudioQueueNewOutput(&mDataFormat, AQBufferCallback, (__bridge void *)self,  NULL, NULL, 0, &mQueue);

//生成若干 mBuffers (AudioQueueBufferRef)
for (int i = 0; i < 3; ++i) 
{
    AudioQueueAllocateBufferWithPacketDescriptions(mQueue, bufferByteSize, 0, &mBuffers[i]);
}


//回调
AudioQueueNewOutput(&mDataFormat, AQBufferCallback, (__bridge void *)self,  NULL, NULL, 0, &mQueue);

void AQBufferCallback(void *                    inUserData,
                                AudioQueueRef            inAQ,
                                AudioQueueBufferRef        inBuffer)
{
    //d 是要播放的数据（磁盘读出来的，或者其他地方来的，反正是要播放数据来源）
    memcpy(inBuffer->mAudioData,[d bytes], inBuffer->mAudioDataByteSize);//取缓存器中的音频数据
    AudioQueueEnqueueBuffer(inAQ, inBuffer, 0, NULL);//缓冲器重新放入缓存队列中
}



//========================= 录制 ==============================

// 所属类 AQRecorder
AudioQueueRef mQueue;
AudioStreamBasicDescription	mRecordFormat;

//创建AudioQueue
AudioQueueNewInput(&mRecordFormat, MyInputBufferHandler, (__bridge void *)self，NULL, NULL, 0 , &mQueue);

//回调
static void MyInputBufferHandler(	void *inUserData,//录音回调函数
										AudioQueueRef inAQ,
										AudioQueueBufferRef	inBuffer,// newly filled by the recording audio queue, containing the new audio data
										const AudioTimeStamp *inStartTime,
										UInt32 inNumPackets,
										const AudioStreamPacketDescription* inPacketDesc)

{
	AQRecorder *aqr = (__bridge AQRecorder *)inUserData;

    //将缓冲器中的数据写入磁盘
    [aqr.delegate captureData:(const char *)inBuffer->mAudioData size:inBuffer->mAudioDataByteSize];
    
    //重复利用缓冲器，将缓冲器加入缓存队列
    AudioQueueEnqueueBuffer(inAQ, inBuffer, 0, NULL);
}

参考：https://blog.youkuaiyun.com/midfar/article/details/7233454