IOS边录音边转码mp3小结

Cocos2d-x
#1

实现功能：录音的同时转换成mp3格式
用到的例子和插件：SpeakHere ＋ lame

// ____________________________________________________________________________________
// AudioQueue callback function, called when an input buffers has been filled.
void AQRecorder::MyInputBufferHandler( void *        inUserData,
          AudioQueueRef      inAQ,
          AudioQueueBufferRef     inBuffer,
          const AudioTimeStamp *    inStartTime,
          UInt32        inNumPackets,
          const AudioStreamPacketDescription* inPacketDesc)
{
 AQRecorder *aqr = (AQRecorder *)inUserData;
 try {
  if (inNumPackets > 0) {
   // write packets to file
   XThrowIfError(AudioFileWritePackets(aqr->mRecordFile, FALSE, inBuffer->mAudioDataByteSize,
            inPacketDesc, aqr->mRecordPacket, &inNumPackets, inBuffer->mAudioData),
        "AudioFileWritePackets failed");
 if (!aqr->mp3Encoder) {
                aqr->mp3Encoder = init];
            }
            aqr->mp3Encoder.setToStopped = NO;
            ;
 
   aqr->mRecordPacket += inNumPackets;
  }
  
  // if we're not stopping, re-enqueue the buffe so that it gets filled again
  if (aqr->IsRunning())
   XThrowIfError(AudioQueueEnqueueBuffer(inAQ, inBuffer, 0, NULL), "AudioQueueEnqueueBuffer failed");
 } catch (CAXException e) {
  char buf;
  fprintf(stderr, "Error: %s (%s)\n", e.mOperation, e.FormatError(buf));
 }
}


```


lame代码

- (void)encodePcmData:(void *)pcmBuffer withDataSize:(UInt32)pcmDataSize {
    
    if (!_setToStopped) {
        ;
        int mp3DataSize = pcmDataSize * 4;
        unsigned char mp3Buffer;
        int encodedBytes = lame_encode_buffer( lame, pcmBuffer, pcmBuffer, pcmDataSize, mp3Buffer, mp3DataSize );
        
        ;
        
    }
}

- (void) writeToFile
{
    if (_setToStopped) {
        lame_close(lame);
    }
    
    NSString *path = ;
    NSString *filePath = ;
    ;
    
}


```