Beispiel #1
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()
  @Override
  public Format[] getSupportedOutputFormats(Format input) {
    if (input == null) return outputFormats;
    else {
      if (!(input instanceof AudioFormat)) {
        logger.warning(
            this.getClass().getSimpleName()
                + ".getSupportedOutputFormats: input format does not match, returning format array of {null} for "
                + input); // this can cause an NPE in JMF if it ever
        // happens.
        return new Format[] {null};
      }
      final AudioFormat inputCast = (AudioFormat) input;
      if (!inputCast.getEncoding().equals(AudioFormat.ALAW)
          || (inputCast.getSampleSizeInBits() != 8
              && inputCast.getSampleSizeInBits() != Format.NOT_SPECIFIED)
          || (inputCast.getChannels() != 1 && inputCast.getChannels() != Format.NOT_SPECIFIED)
          || (inputCast.getFrameSizeInBits() != 8
              && inputCast.getFrameSizeInBits() != Format.NOT_SPECIFIED)) {
        logger.warning(
            this.getClass().getSimpleName()
                + ".getSupportedOutputFormats: input format does not match, returning format array of {null} for "
                + input); // this can cause an NPE in JMF if it ever
        // happens.
        return new Format[] {null};
      }
      final AudioFormat result =
          new AudioFormat(
              BonusAudioFormatEncodings.ALAW_RTP,
              inputCast.getSampleRate(),
              8,
              1,
              inputCast.getEndian(),
              inputCast.getSigned(),
              8,
              inputCast.getFrameRate(),
              inputCast.getDataType());

      return new Format[] {result};
    }
  }