B4J Question How to get Microphone audio levels on B4J?

    public static double GetLevels() {
        AudioFormat fmt = new AudioFormat(44100f, 16, 2, true, false);
        //AudioFormat fmt =  getAudioFormat();
        final int bufferByteSize = 2048;

        TargetDataLine line;
        try {
            line = AudioSystem.getTargetDataLine(fmt);
            line.open(fmt, bufferByteSize);
        } catch(LineUnavailableException e) {
            System.err.println(e);
            return 0;
        }

        byte[] buf = new byte[bufferByteSize];
        float[] samples = new float[bufferByteSize / 2];

        float lastPeak = 0f;

        line.start();
        for(int b; (b = line.read(buf, 0, buf.length)) > -1;) {
            // convert bytes to samples here
            for(int i = 0, s = 0; i < b;) {
                int sample = 0;
                sample |= buf[i++] & 0xFF; // (reverse these two lines
                sample |= buf[i++] << 8;   //  if the format is big endian)
                samples[s++] = sample / 32768f;    // normalize to range of +/-1.0f
            }

            float rms = 0f;
            float peak = 0f;
            for(float sample : samples) {
                float abs = Math.abs(sample);
                if(abs > peak) {
                    peak = abs;
                }
                rms += sample * sample;
            }
            rms = (float)Math.sqrt(rms / samples.length);
            System.out.println("rms value is: " + rms);
            return rms;
        }
        return 0;
    }