Audio Queue如何停止當前的播放任務並立即開始播放另一個AudioQueueBuffer？

Question

需要：我有一個音頻隊列和兩個AudioQueueBuffer 。 如何在1號AudioQueueBuffer播放中立即播放2號AudioQueueBuffer 。 我嘗試了AudioQueueStop或AudioQueueReset 。 處理需要很長時間，NO.2 AudioQueueBuffer播放太晚了。

-(void)playBuffer:(AudioBuffer *)buffer format:(const AudioStreamBasicDescription *)format
{
    AudioQueueStop(_audioQueue, YES);//this line consuming too much time
    AudioQueueDispose(_audioQueue, YES);
    AudioQueueRef newAudioQueue;
    AudioQueueBufferRef queueBuffer;
    AudioQueueNewOutput(format, audioQueueOutputCallback, (__bridge void*)self,
                        nil, nil, 0, &newAudioQueue);
    OSStatus status;
    status = AudioQueueAllocateBuffer(newAudioQueue, buffer->mDataByteSize, &queueBuffer);

    memcpy(queueBuffer->mAudioData, buffer->mData, buffer->mDataByteSize);
    queueBuffer->mAudioDataByteSize=buffer->mDataByteSize;
    status = AudioQueueEnqueueBuffer(newAudioQueue, queueBuffer, 0, NULL);

    Float32 gain=1.0;
    AudioQueueSetParameter(newAudioQueue, kAudioQueueParam_Volume, gain);
    AudioQueueStart(newAudioQueue, nil);
    AudioQueueFreeBuffer(newAudioQueue, queueBuffer);
    _audioQueue = newAudioQueue;
}

所以我的問題是： audio queue是否可以立即播放下一個音頻緩沖區？或者audio queue與該任務不匹配，我需要替代方法嗎？

Answer 1

最后，我只是異步處理audioQueue。 但我認為AVAudioUint可能是適合我的情況的更好解決方案。

- (void)playBuffer:(AudioBuffer *)buffer format:(const AudioStreamBasicDescription *)format
{
    oldAudioQueue = _audioQueue;
    if (oldAudioQueue){
        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
            AudioQueuePause(oldAudioQueue);
            //AudioQueueStop(oldAudioQueue, YES);//this line consuming too much time, will barries thread
            AudioQueueDispose(oldAudioQueue, YES);
            oldAudioQueue = nil;
        });
    }

    AudioQueueRef newAudioQueue;
    AudioQueueBufferRef queueBuffer;
    AudioQueueNewOutput(format, audioQueueOutputCallback, (__bridge void*)self,
                        nil, nil, 0, &newAudioQueue);

    OSStatus status;
    status = AudioQueueAllocateBuffer(newAudioQueue, buffer->mDataByteSize, &queueBuffer);

    memcpy(queueBuffer->mAudioData, buffer->mData, buffer->mDataByteSize);
    queueBuffer->mAudioDataByteSize=buffer->mDataByteSize;
    status = AudioQueueEnqueueBuffer(newAudioQueue, queueBuffer, 0, NULL);

    Float32 gain=1.0;
    AudioQueueSetParameter(newAudioQueue, kAudioQueueParam_Volume, gain);
    AudioQueueStart(newAudioQueue, nil);
    AudioQueueFreeBuffer(newAudioQueue, queueBuffer);
    _audioQueue = newAudioQueue;
}