音频队列如何停止当前播放任务并立即开始播放另一个AudioQueueBuffer?
问题描述:
需要:我有一个音频队列和两个AudioQueueBuffer
。如何在AudioQueueBuffer
中玩 NO.2 AudioQueueBuffer
。 我试过AudioQueueStop
或AudioQueueReset
。需要很长时间才能处理,玩得太晚。音频队列如何停止当前播放任务并立即开始播放另一个AudioQueueBuffer?
-(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;
}
所以我的问题是:是否有可能audio queue
播放下一个音频缓冲立即或audio queue
不匹配这个任务,我需要一个替代方案?
答
终于我只是异步处置audioQueue。但我认为AVAudioUint
也许是我的情况更好的解决方案。
- (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;
}
+2
在我的情况下,我必须播放不同的'AudioBuffer',当新的'AudioBuffer'来临时,APP必须停止旧的音频并播放新的 – ooOlly
'AVAudioUnit'可能是一个不错的选择。 – ooOlly