一段混音代码，留着避免日后用
很忙，废话不多说。
将mic录音和伴奏混合成wav。
public class MixRunnable implements Runnable { private MixRecorder context; /** * AudioRecord创建参数类 * * @author christ */ private static class RecorderParameter { // 音频获取源 private static int audioSource = MediaRecorder.AudioSource.MIC; // 设置音频采样率，44100是目前的标准，但是某些设备仍然支持22050，16000，11025 private static final int sampleRateInHz = 44100; // 设置音频的录制的声道CHANNEL_IN_STEREO为双声道，CHANNEL_CONFIGURATION_MONO为单声道 private static final int channelConfig = AudioFormat.CHANNEL_CONFIGURATION_MONO; // 音频数据格式:PCM 16位每个样本。保证设备支持。PCM 8位每个样本。不一定能得到设备支持。 private static final int audioFormat = AudioFormat.ENCODING_PCM_16BIT; // 缓冲区字节大小 private static int bufferSizeInBytes; } // 设置运行状态 private boolean isRunning = true; // AudioRecord对象 private static AudioRecord recorder; // 设置MediaPlayer对象 private static MediaPlayer mediaPlayer; // 伴奏文件 private FileInputStream accompany; // 原唱文件 private FileInputStream original; // 得分 private int score; private boolean isFirst = true; /** * 混音评分线程的构造方法 * * @param accompany * ：伴奏文件路径 * @param original * ：原唱文件路径 * @throws FileNotFoundException */ public MixRunnable(MixRecorder context, String accompany, String original) throws FileNotFoundException { this.context = context; this.accompany = new FileInputStream(accompany); this.original = new FileInputStream(original); creatAudioRecord(); mediaPlayer = new MediaPlayer(); } @Override public void run() { try { // MediaPlayer准备 mediaPlayer.reset(); mediaPlayer.setDataSource("/sdcard/111.wav"); // mediaPlayer.setDataSource(accompany.getFD()); mediaPlayer.setOnCompletionListener(new OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { isRunning = false; } }); mediaPlayer.prepare(); // 跳过头 accompany.read(new byte[44]); original.read(new byte[44]); FileOutputStream fos = new FileOutputStream(new File("/sdcard/love.raw")); // 开始读 byte[] sourceReader = new byte[RecorderParameter.bufferSizeInBytes * 2]; short[] sourceShortArray; short[] audioReader = new short[sourceReader.length / 4]; mediaPlayer.start(); recorder.startRecording(); while (isRunning) { int sourceReadSize = accompany.read(sourceReader, 0, sourceReader.length); if (sourceReadSize < 0) { isRunning = false; continue; } sourceShortArray = byteToShortArray(sourceReader, sourceReadSize / 2); recorder.read(audioReader, 0, audioReader.length); short[] oneSecond = mixVoice(sourceShortArray, audioReader, sourceReadSize / 2); byte[] outStream = new byte[oneSecond.length * 2]; for (int i = 0; i < oneSecond.length; i++) { byte[] b = shortToByteArray(oneSecond<i>); outStream[2 * i] = b[0]; outStream[2 * i + 1] = b[1]; } Log.d("mtime4", "" + System.currentTimeMillis()); fos.write(outStream); // 评分 byte[] srcBuffer = new byte[outStream.length]; original.read(srcBuffer); int x = score(byteToShortArray(srcBuffer, srcBuffer.length / 2), oneSecond); System.out.println(x); } if (mediaPlayer.isPlaying()) { mediaPlayer.stop(); } recorder.release(); mediaPlayer.release(); fos.close(); copyWaveFile("/sdcard/love.raw", "/sdcard/haah.wav"); } catch (Exception e) { e.printStackTrace(); } } /** * 创建AudioRecord对象方法 */ private void creatAudioRecord() { // 获得缓冲区字节大小 RecorderParameter.bufferSizeInBytes = AudioRecord.getMinBufferSize(RecorderParameter.sampleRateInHz, RecorderParameter.channelConfig, RecorderParameter.audioFormat) * 20; // 创建AudioRecord对象 recorder = new AudioRecord(RecorderParameter.audioSource, RecorderParameter.sampleRateInHz, RecorderParameter.channelConfig, RecorderParameter.audioFormat, RecorderParameter.bufferSizeInBytes); } private short[] mixVoice(short[] source, short[] audio, int items) { short[] array = new short[items]; for (int i = 0; i < items; i++) { array<i> = (short) ((source<i> + audio[i / 2]) / 2); } return array; } /** * byte数组转换成short数组 * * @param data * @param items * @return */ private short[] byteToShortArray(byte[] data, int items) { short[] retVal = new short[items]; for (int i = 0; i < retVal.length; i++) retVal<i> = (short) ((data[i * 2] & 0xff) | (data[i * 2 + 1] & 0xff) << 8); return retVal; } /** * short转byte数组 * * @param s * @return */ private byte[] shortToByteArray(short s) { byte[] shortBuf = new byte[2]; for (int i = 0; i < 2; i++) { int offset = (shortBuf.length - 2 + i) * 8; shortBuf<i> = (byte) ((s >>> offset) & 0xff); } return shortBuf; } /** * <a href="\"http://www.eoeandroid.com/home.php?mod=space&uid=7300\"" target="\"_blank\"">@return</a> the recorder */ public static AudioRecord getRecorder() { return recorder; } public static MediaPlayer getMediaPlayer() { return mediaPlayer; } /** * 设置线程运行状态 * * @param isRunning */ public void setIsRunning(boolean isRunning) { this.isRunning = isRunning; } /** * 获取线程运行状态 * * @return */ public boolean IsRunning() { return isRunning; } public int getScore() { return score; } private void copyWaveFile(String inFilename, String outFilename) { FileInputStream in = null; FileOutputStream out = null; long totalAudioLen = 0; long totalDataLen = totalAudioLen + 36; long longSampleRate = RecorderParameter.sampleRateInHz; int channels = 2; long byteRate = 16 * RecorderParameter.sampleRateInHz * channels / 8; byte[] data = new byte[RecorderParameter.bufferSizeInBytes]; 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 (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } /** * 这里提供一个头信息。插入这些信息就可以得到可以播放的文件。 为我为啥插入这44个字节，这个还真没深入研究，不过你随便打开一个wav * 音频的文件，可以发现前面的头文件可以说基本一样哦。每种格式的文件都有 自己特有的头文件。 */ 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'; 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'; 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); } private int score(short[] src, short[] user) { int srcZ = 0, userZ = 0; boolean isAsc = false; boolean uisAsc = false; for (int i = 1; i < src.length; i++) { if (isAsc) { if (src[i - 1] > src<i>) { isAsc = false; } } else { if (src[i - 1] < src<i>) { isAsc = true; srcZ += 1; } } if (uisAsc) { if (user[i - 1] > user<i>) { uisAsc = false; } } else { if (user[i - 1] < user<i>) { uisAsc = true; userZ += 1; } } } return Math.abs(srcZ - userZ); } }