Android pcm转wav格式方法

package com.hgb.mytest;import android.media.AudioFormat;import android.media.AudioRecord;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;/** * Created by HaoGuibao * Date 2016/8/26. * Description :pcm格式的音频转换为wav格式的工具类 */public class PcmToWavUtil { private int mBufferSize; //缓存的音频大小 private int mSampleRate = 8000;// 8000|16000 private int mChannel = AudioFormat.CHANNEL_IN_STEREO; //立体声 private int mEncoding = AudioFormat.ENCODING_PCM_16BIT; public PcmToWavUtil() {  this.mBufferSize = AudioRecord.getMinBufferSize(mSampleRate, mChannel, mEncoding); } /**  * @param sampleRate sample rate、采样率  * @param channel channel、声道  * @param encoding Audio data format、音频格式  */ public PcmToWavUtil(int sampleRate, int channel, int encoding) {  this.mSampleRate = sampleRate;  this.mChannel = channel;  this.mEncoding = encoding;  this.mBufferSize = AudioRecord.getMinBufferSize(mSampleRate, mChannel, mEncoding); } /**  * pcm文件转wav文件  *  * @param inFilename 源文件路径  * @param outFilename 目标文件路径  */ public void pcmToWav(String inFilename, String outFilename) {  FileInputStream in;  FileOutputStream out;  long totalAudioLen;  long totalDataLen;  long longSampleRate = mSampleRate;  int channels = 2;  long byteRate = 16 * mSampleRate * channels / 8;  byte[] data = new byte[mBufferSize];  try {   in = new FileInputStream(inFilename);   out = new FileOutputStream(outFilename);   totalAudioLen = in.getChannel().size();   totalDataLen = totalAudioLen + 36;   writeWaveFileHeader(out, totalAudioLen, totalDataLen,     longSampleRate, channels, byteRate);   while (in.read(data) != -1) {    out.write(data);   }   in.close();   out.close();  } catch (IOException e) {   e.printStackTrace();  } } /**  * 加入wav文件头  */ private void writeWaveFileHeader(FileOutputStream out, long totalAudioLen,          long totalDataLen, long longSampleRate, int channels, long byteRate)   throws IOException {  byte[] header = new byte[44];  header[0] = 'R'; // RIFF/WAVE header  header[1] = 'I';  header[2] = 'F';  header[3] = 'F';  header[4] = (byte) (totalDataLen & 0xff);  header[5] = (byte) ((totalDataLen >> 8) & 0xff);  header[6] = (byte) ((totalDataLen >> 16) & 0xff);  header[7] = (byte) ((totalDataLen >> 24) & 0xff);  header[8] = 'W'; //WAVE  header[9] = 'A';  header[10] = 'V';  header[11] = 'E';  header[12] = 'f'; // 'fmt ' chunk  header[13] = 'm';  header[14] = 't';  header[15] = ' ';  header[16] = 16; // 4 bytes: size of 'fmt ' chunk  header[17] = 0;  header[18] = 0;  header[19] = 0;  header[20] = 1; // format = 1  header[21] = 0;  header[22] = (byte) channels;  header[23] = 0;  header[24] = (byte) (longSampleRate & 0xff);  header[25] = (byte) ((longSampleRate >> 8) & 0xff);  header[26] = (byte) ((longSampleRate >> 16) & 0xff);  header[27] = (byte) ((longSampleRate >> 24) & 0xff);  header[28] = (byte) (byteRate & 0xff);  header[29] = (byte) ((byteRate >> 8) & 0xff);  header[30] = (byte) ((byteRate >> 16) & 0xff);  header[31] = (byte) ((byteRate >> 24) & 0xff);  header[32] = (byte) (2 * 16 / 8); // block align  header[33] = 0;  header[34] = 16; // bits per sample  header[35] = 0;  header[36] = 'd'; //data  header[37] = 'a';  header[38] = 't';  header[39] = 'a';  header[40] = (byte) (totalAudioLen & 0xff);  header[41] = (byte) ((totalAudioLen >> 8) & 0xff);  header[42] = (byte) ((totalAudioLen >> 16) & 0xff);  header[43] = (byte) ((totalAudioLen >> 24) & 0xff);  out.write(header, 0, 44); }}

public class MainActivity extends AppCompatActivity { /**  * pcm格式转wav格式工具类  */ private PcmToWavUtil pcmToWavUtil = new PcmToWavUtil(); @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  final String path = "/sdcard/yxck/treamentRecord/123.pcm";  //按原路径把音频文件后缀改一下;  final String outpath = path.replace(".pcm", ".wav");  Button button = (Button) findViewById(R.id.button);  button.setOnClickListener(new View.OnClickListener() {   @Override   public void onClick(View view) {    pcmToWavUtil.pcmToWav(path, outpath);   }  }); }}