!7

static JButton btn;
static Flag flag; // stop flag

static AudioFormat format;

static double bufferSeconds = 0.1;
static int bufferSize = iround(bufferSeconds*44100*2);

p-tt {
  print("Buffer size: " + bufferSize);
  format = javaSound_monoCDQuality°;
  swing {
    showControls(jcenteredline(btn = jbutton("Start", f btn)));
  }
  start();
  sleepIfMain();
}

svoid btn {
  if (flag == null || flag.isUp()) start(); else stop();
}

svoid start ctex {
  setText(btn, "Stop");
  flag = new Flag;

  final OutputStream out = new MonoSamplesForwarder(f handleAudio);
  //MonoSamplesForwarder.debug = true;
  captureAudioFromLine3_bufSize = bufferSize;
    
  thread {
    captureAudioFromLine3(format, out, flag);
    print("Done");
  }
}

svoid stop {
  setText(btn, "Start");
  flag.raise();
}

svoid handleAudio(float[] f) {
  double abs = audio_absoluteVolume(f);
  consoleStatus(toPercent(abs) + "%");
  /*print("Have " + l(f) + " floats. Volume=" + audio_rmsVolume(f)
    + ", abs volume=" + abs);*/
  //if (l(f) >= 8) print(struct(subArray(f, 0, 8)));
}

Began life as a copy of #1009769