Question

我正在开发一个使用Android手机立体声录音的项目（注3）。但我需要从不同的渠道（右，左）分割数据。知道怎么做吗？

现在，我使用AudioRecord录制内置麦克风的声音。我可以录制，将声音保存为.raw和.wav文件。

有些代码如下。

private int audioSource = MediaRecorder.AudioSource.MIC;  
private static int sampleRateInHz = 44100;  
private static int channelConfig = AudioFormat.CHANNEL_IN_STEREO;  
private static int audioFormat = AudioFormat.ENCODING_PCM_16BIT;


bufferSizeInBytes = AudioRecord.getMinBufferSize(sampleRateInHz,  
            channelConfig, audioFormat);  

audioRecord = new AudioRecord(audioSource, sampleRateInHz,  
            channelConfig, audioFormat, bufferSizeInBytes);

// some other codes....

//get the data from audioRecord
readsize = audioRecord.read(audiodata, 0, bufferSizeInBytes);

Answer 1

最后，我得到了答案。我使用了Android手机的立体声录音。 audioFormat是PCM_16BIT。

private int audioSource = MediaRecorder.AudioSource.MIC;  
private static int sampleRateInHz = 48000;  
private static int channelConfig = AudioFormat.CHANNEL_IN_STEREO;  
private static int audioFormat = AudioFormat.ENCODING_PCM_16BIT;

表示存储在缓冲区中的数据如下。

leftChannel data: [0,1],[4,5]...
rightChannel data: [2,3],[6,7]...

所以分割立体声记录数据的代码。

readSize = audioRecord.read(audioShortData, 0, bufferSizeInBytes);
for(int i = 0; i < readSize/2; i = i + 2)
{
       leftChannelAudioData[i] = audiodata[2*i];
       leftChannelAudioData[i+1] = audiodata[2*i+1]; 
       rightChannelAudioData[i] =  audiodata[2*i+2];
       rightChannelAudioData[i+1] = audiodata[2*i+3];
}

然后您可以将数据写入文件。

leftChannelFos = new FileOutputStream(rawLeftChannelDataFile);
rightChannelFos = new FileOutputStream(rawRightChannelDataFile);
leftChannelBos = new BufferedOutputStream(leftChannelFos);
rightChannelBos = new BufferedOutputStream(rightChannelFos);
leftChannelDos = new DataOutputStream(leftChannelBos);
rightChannelDos = new  DataOutputStream(rightChannelBos);

leftChannelDos.write(leftChannelAudioData);
rightChannelDos.write(rightChannelAudioData);

快乐的编码！

拆分CHANNEL_IN_STEREO的两个AudioRecord通道

1 个答案: