コード例 #1
0
ファイル: AudioModel.java プロジェクト: jimomulloy/tonemap
  public boolean load(File file) {

    this.file = file;

    if (file != null && file.isFile()) {
      try {
        errStr = null;
        audioInputStream = AudioSystem.getAudioInputStream(file);

        fileName = file.getName();

        format = audioInputStream.getFormat();

      } catch (Exception ex) {
        reportStatus(ex.toString());
        return false;
      }
    } else {
      reportStatus("Audio file required.");
      return false;
    }

    numChannels = format.getChannels();
    sampleRate = (double) format.getSampleRate();
    sampleBitSize = format.getSampleSizeInBits();
    long frameLength = audioInputStream.getFrameLength();
    long milliseconds = (long) ((frameLength * 1000) / audioInputStream.getFormat().getFrameRate());
    double audioFileDuration = milliseconds / 1000.0;

    if (audioFileDuration > MAX_AUDIO_DURATION) duration = MAX_AUDIO_DURATION;
    else duration = audioFileDuration;

    frameLength = (int) Math.floor((duration / audioFileDuration) * (double) frameLength);

    try {
      audioBytes = new byte[(int) frameLength * format.getFrameSize()];
      audioInputStream.read(audioBytes);
    } catch (Exception ex) {
      reportStatus(ex.toString());
      return false;
    }

    getAudioData();

    return true;
  }
コード例 #2
0
ファイル: AudioModel.java プロジェクト: jimomulloy/tonemap
  private void getAudioData() {

    if (format.getSampleSizeInBits() == 16) {
      nlengthInSamples = audioBytes.length / 2;
      audioData = new int[nlengthInSamples];
      if (format.isBigEndian()) {
        for (int i = 0; i < nlengthInSamples; i++) {
          // First byte is MSB (high order)
          int MSB = (int) audioBytes[2 * i];
          // Second byte is LSB (low order)
          int LSB = (int) audioBytes[2 * i + 1];
          audioData[i] = MSB << 8 | (255 & LSB);
        }
      } else {
        for (int i = 0; i < nlengthInSamples; i++) {
          // First byte is LSB (low order)
          int LSB = (int) audioBytes[2 * i];
          // Second byte is MSB (high order)
          int MSB = (int) audioBytes[2 * i + 1];
          audioData[i] = MSB << 8 | (255 & LSB);
        }
      }
    } else {
      if (format.getSampleSizeInBits() == 8) {
        nlengthInSamples = audioBytes.length;
        audioData = new int[nlengthInSamples];
        if (format.getEncoding().toString().startsWith("PCM_SIGN")) {
          for (int i = 0; i < audioBytes.length; i++) {
            audioData[i] = audioBytes[i];
          }
        } else {
          for (int i = 0; i < audioBytes.length; i++) {
            audioData[i] = audioBytes[i] - 128;
          }
        }
      }
    }
  }