package com.example.thomas.android_ss1;

/**
 * Created by thomas on 21.06.18.
 *  Übernommen und angepasst von http://masterex.github.io/archive/2012/05/28/android-audio-synthesis.html
 *
 */

import android.os.Handler;
import android.os.Message;
import android.util.Log;

public class Metronome extends Thread {

    public double bpm = 120;
    private int beat;
    private int noteValue;
    private int silence;

    private double beatSound = 800;
    private double sound = 400;
    private final int tick = 1000; // samples of tick

    public boolean play = false;

    private AudioGenerator audioGenerator = new AudioGenerator(8000);

    public Metronome() {
        audioGenerator.createPlayer();
    }

    public void calcSilence() {
        silence = (int) (((60/bpm)*8000)-tick);
    }

    public void startPlayingMetronome() {
        play = true;
        calcSilence();
        double[] tick =
                audioGenerator.getSineWave(this.tick, 8000, beatSound);
        double[] tock =
                audioGenerator.getSineWave(this.tick, 8000, sound);
        double silence = 0;
        double[] sound = new double[8000];
        int t = 0,s = 0,b = 0;
        do {
            for(int i=0;i<sound.length&&play;i++) {
                if(t<this.tick) {
                    if(b == 0)
                        sound[i] = tock[t];
                    else
                        sound[i] = tick[t];
                    t++;
                } else {
                    sound[i] = silence;
                    s++;
                    if(s >= this.silence) {
                        t = 0;
                        s = 0;
                        b++;
                        if(b > (this.beat-1))
                            b = 0;
                    }
                }
            }
            audioGenerator.writeSound(sound);
        } while(play);
    }

    public void stopPlayingMetronome() {
        play = false;
        audioGenerator.destroyAudioTrack();

    }
    public void destroyMetronome(){

    }




        /* Getters and Setters ... */
}