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我需要使用Objective C在iOS应用中进行音频流式传输。我使用AVFoundation框架并从麦克风捕获原始数据并发送到服务器。但是，我收到的原始数据是腐败的，下面是我的代码。音频使用iOS中的音频队列/缓冲区流式传输AVFoundation
请建议我在哪里做错了。
session = [[AVCaptureSession alloc] init];
NSDictionary *recordSettings = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:kAudioFormatLinearPCM],AVFormatIDKey,
[NSNumber numberWithFloat:16000.0], AVSampleRateKey,
[NSNumber numberWithInt: 1],AVNumberOfChannelsKey,
[NSNumber numberWithInt:32], AVLinearPCMBitDepthKey,
[NSNumber numberWithBool:NO],AVLinearPCMIsBigEndianKey,
[NSNumber numberWithBool:NO], AVLinearPCMIsFloatKey,
[NSNumber numberWithBool:NO], AVLinearPCMIsNonInterleaved,
nil];
AVCaptureDevice *audioDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
AVCaptureDeviceInput *audioInput = [AVCaptureDeviceInput deviceInputWithDevice:audioDevice error:nil];
[session addInput:audioInput];
AVCaptureAudioDataOutput *audioDataOutput = [[AVCaptureAudioDataOutput alloc] init];
dispatch_queue_t audioQueue = dispatch_queue_create("AudioQueue", NULL);
[audioDataOutput setSampleBufferDelegate:self queue:audioQueue];
AVAssetWriterInput *_assetWriterVideoInput = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeAudio outputSettings:recordSettings];
_assetWriterVideoInput.performsMultiPassEncodingIfSupported = YES;
if([session canAddOutput:audioDataOutput]){
[session addOutput:audioDataOutput];
}
[session startRunning];
捕捉：
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection{
AudioBufferList audioBufferList;
NSMutableData *data= [NSMutableData data];
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];
NSString *base64Encoded = [data base64EncodedStringWithOptions:0];
NSLog(@"Encoded: %@", base64Encoded);
}
CFRelease(blockBuffer);
}
