!7

// Original source: AudioLoop from jsresources.org

static int DEFAULT_INTERNAL_BUFSIZ = 40960, DEFAULT_EXTERNAL_BUFSIZ = 40960;

p {

  temp WAVDecoder decoder = new(newFileInputStream(loadLibrary(#1400093)));

  new L<short[]> chunks;

  while licensed {

    short[] buf = new short[4096];

    int n = decoder.readMonoSamples(buf);

    if (n <= 0) break;

    chunks.add(subArray(buf, 0, n));

  }

  short[] samples = concatShortArrays(chunks);

  new AudioLoop(javaSound_cdQuality(), DEFAULT_INTERNAL_BUFSIZ, DEFAULT_EXTERNAL_BUFSIZ, samples).start();

}

sclass AudioLoop extends Thread {

  TargetDataLine in;

  SourceDataLine out;

  new Flag stopFlag;

  int externalBufferSize;

  byte[] buf;

  short[] samples;

  *(AudioFormat format, int internalBufferSize, int *externalBufferSize, short[] *samples) {

    out = javaSound_outputLine(format, internalBufferSize);

    buf = new byte[internalBufferSize];

  }

  public void start { out.start°; super.start°; }

  void stopPlaying { out.close°; stopFlag.raise°; } // "stop()" was taken

  int sampleIndex = 0;

  double nextSample() {

    double f = samples[sampleIndex]/32767.0;

    sampleIndex = (sampleIndex+1) % l(samples);

    ret f;

  }

  public void run° {

    while (licensed() && !stopFlag.isUp()) {

      for (int i = 0; i < l(buf); i += 4) {

        double f = nextSample();

        int x = iround(max(0, min(1, f))*32767);

        buf[i] = buf[i+2] = (byte) x;

        buf[i+1] = buf[i+3] = (byte) (x >> 8);

      }

      //print("Writing " + l(buf) + " bytes");

      int n = out.write(buf, 0, l(buf));

      if (n != l(buf)) print("huh: " + n + " of " + l(buf));

    }

  }

}