android wav 去头信息转化成pcm 格式数据

/** * WAV转PCM文件 * * @param wavfilepath wav文件路径 * @return */public static byte[] convertAudioFiles(String wavfilepath) {    FileInputStream fileInputStream;    byte[] pcmbyte = new byte[0];    try {        fileInputStream = new FileInputStream(wavfilepath);             byte[] sWavbyte = InputStreamToByte(fileInputStream);        LUtils.d(TAG, "sWavbyte==" + Arrays.toString(sWavbyte));        pcmbyte = Arrays.copyOfRange(sWavbyte, 0, sWavbyte.length);        LUtils.d(TAG, "pcmbyte==" + Arrays.toString(pcmbyte));          IOUtils.closeQuietly(fileInputStream);    } catch (Exception e) {        System.out.println(e.getMessage());    }    return pcmbyte;}

/** * 输入流转byte二进制数据 * * @param fis * @return * @throws IOException */private static byte[] InputStreamToByte(FileInputStream fis) throws IOException {    ByteArrayOutputStream byteStream = new ByteArrayOutputStream();    long size = fis.getChannel().size();    int conutlenget = conutlenget(fis);    //        、、=====================================    Log.d("MainActivity", "  long size===" + size);    byte[] buffer = null;    if (size <= Integer.MAX_VALUE) {        buffer = new byte[(int) size];    } else {        buffer = new byte[8];        for (int ix = 0; ix < 8; ++ix) {            int offset = 64 - (ix + 1) * 8;            buffer[ix] = (byte) ((size >> offset) & 0xff);        }    }    int len;    while ((len = fis.read(buffer)) != -1) {        byteStream.write(buffer, 0, len);    }    byte[] data = byteStream.toByteArray();    IOUtils.closeQuietly(byteStream);    return data;}

/** * 打印包头 * @param fis * @return * @throws IOException */private static int conutlenget(FileInputStream fis) throws IOException {    byte[] intValue = new byte[4];    byte[] shortValue = new byte[2];    //4    String mChunkID = "" + (char) fis.read() + (char) fis.read() + (char) fis.read() + (char) fis.read();    Log.d(TAG, "Read file chunkID:" + mChunkID);//chunkID    //4    fis.read(intValue);    int mChunkSize = byteArrayToInt(intValue);    Log.d(TAG, "Read file chunkSize:" + mChunkSize);//20646    //4    String mFormat = "" + (char) fis.read() + (char) fis.read() + (char) fis.read() + (char) fis.read();    Log.d(TAG, "Read file format:" + mFormat);//WAVE    //4    String mSubChunk1ID = "" + (char) fis.read() + (char) fis.read() + (char) fis.read() + (char) fis.read();    Log.d(TAG, "Read fmt chunkID:" + mSubChunk1ID);//fmt    //4    fis.read(intValue);    int mSubChunk1Size = byteArrayToInt(intValue);    Log.d(TAG, "Read fmt chunkSize:" + mSubChunk1Size);//16    //2    fis.read(shortValue);    int mAudioFormat = byteArrayToShort(shortValue);    Log.d(TAG, "Read audioFormat:" + mAudioFormat);//1    //2    fis.read(shortValue);    int mNumChannel = byteArrayToShort(shortValue);    Log.d(TAG, "Read channel number:" + mNumChannel);//1    //4    fis.read(intValue);    int mSampleRate = byteArrayToInt(intValue);    Log.d(TAG, "Read samplerate:" + mSampleRate);//8000    //4    fis.read(intValue);    int mByteRate = byteArrayToInt(intValue);    Log.d(TAG, "Read byterate:" + mByteRate); //16000    //2    fis.read(shortValue);    int mBlockAlign = byteArrayToShort(shortValue);    Log.d(TAG, "Read blockalign:" + mBlockAlign);//2    //2    fis.read(shortValue);    int mBitsPerSample = byteArrayToShort(shortValue);    Log.d(TAG, "Read bitspersample:" + mBitsPerSample); //16    //4    String mSubChunk2ID = "" + (char) fis.read() + (char) fis.read() + (char) fis.read() + (char) fis.read();    Log.d(TAG, "Read data chunkID:" + mSubChunk2ID);//LIST    //4    fis.read(intValue);    int mSubChunk2Size = byteArrayToInt(intValue);    Log.d(TAG, "Read data chunkSize:" + mSubChunk2Size);//chunkSize122    Log.d(TAG, "Read wav file success !");    return mSubChunk2Size;}private static short byteArrayToShort(byte[] b) {    return ByteBuffer.wrap(b).order(ByteOrder.LITTLE_ENDIAN).getShort();}private static int byteArrayToInt(byte[] b) {    return ByteBuffer.wrap(b).order(ByteOrder.LITTLE_ENDIAN).getInt();}

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