我想从一台iOS设备录制音频,然后同时发送并播放到另一台设备。
我尝试使用AVCaptureAudioDataOutput并在两端正确发送/接收CMSampleBufferRef,但是当我在接收设备上播放时,我得到:Error Domain = NSOSStatusError Domain Code = 1954115647。
我使用以下代码将收到的CMSampleBufferRef转换为发件人设备上的NSData:
if (captureOutput == audioOutput) {
AudioBufferList audioBufferList;
NSMutableData *data=[[NSMutableData alloc] init];
CMBlockBufferRef blockBuffer;
CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer(sampleBuffer, NULL, &audioBufferList,
sizeof(audioBufferList), NULL, NULL, 0, &blockBuffer);
for( int y=0; y<audioBufferList.mNumberBuffers; y++ )
{
AudioBuffer audioBuffer = audioBufferList.mBuffers[y];
Float32 *frame = (Float32*)audioBuffer.mData;
[data appendBytes:frame length:audioBuffer.mDataByteSize];
}
[self performSelectorOnMainThread:@selector(sendAudio:) withObject:data waitUntilDone:NO];
CFRelease(blockBuffer);
blockBuffer=NULL;
}
以及在接收器设备上播放音频的代码:
audioPlayer = [[AVAudioPlayer alloc] initWithData:audioData error:&error];
audioPlayer.numberOfLoops = -1;
audioPlayer.volume = 1.0;
if (audioPlayer == nil)
NSLog(@"%@", [error description]);
else
[audioPlayer play];
它似乎无法识别收到的字节为正确的音频格式。
请帮我收到这个问题。
感谢。