示例#1
0
  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;
  }
示例#2
0
  public static Clip loadClip(URL url) {
    Clip clip = null;
    String fnm = "" + url;
    try {
      AudioInputStream stream = AudioSystem.getAudioInputStream(url);
      AudioFormat format = stream.getFormat();

      if ((format.getEncoding() == AudioFormat.Encoding.ULAW)
          || (format.getEncoding() == AudioFormat.Encoding.ALAW)) {
        AudioFormat newFormat =
            new AudioFormat(
                AudioFormat.Encoding.PCM_SIGNED,
                format.getSampleRate(),
                format.getSampleSizeInBits() * 2,
                format.getChannels(),
                format.getFrameSize() * 2,
                format.getFrameRate(),
                true); // big endian
        stream = AudioSystem.getAudioInputStream(newFormat, stream);
        // System.out.println("Converted Audio format: " + newFormat);
        format = newFormat;
      }

      DataLine.Info info = new DataLine.Info(Clip.class, format);

      // make sure sound system supports data line
      if (!AudioSystem.isLineSupported(info)) {
        System.out.println("Unsupported Clip File: " + fnm);
        return null;
      }
      // get clip line resource
      clip = (Clip) AudioSystem.getLine(info);
      clip.open(stream); // open the sound file as a clip
      stream.close(); // we're done with the input stream
      // duration (in secs) of the clip
      double duration = clip.getMicrosecondLength() / 1000000.0; // new
      if (duration <= 1.0) {
        System.out.println("WARNING. Duration <= 1 sec : " + duration + " secs");
        System.out.println(
            "         The clip in " + fnm + " may not play in J2SE 1.5 -- make it longer");
      }
      // else
      //  System.out.println(fnm + ": Duration: " + duration + " secs");
    } // end of try block
    catch (UnsupportedAudioFileException audioException) {
      System.out.println("Unsupported audio file: " + fnm);
    } catch (LineUnavailableException noLineException) {
      System.out.println("No audio line available for : " + fnm);
    } catch (IOException ioException) {
      System.out.println("Could not read: " + fnm);
    } catch (Exception e) {
      System.out.println("Problem with " + fnm);
    }
    return clip;
  } // end of loadClip()
示例#3
0
  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;
          }
        }
      }
    }
  }