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import jm.audio.AudioObject;
import jm.audio.io.SampleOut;
import jm.audio.synth.*;

/**
 * An amplitude modulation synthesis instrument
 * which uses a noise modulation source
 *
 * @author Andrew Brown
 */

public final class AMNoiseInst extends jm.audio.Instrument {
    //----------------------------------------------
    // Attributes
    //----------------------------------------------
    /**
     * the sample rate passed to the instrument
     */
    private int sampleRate;
    /**
     * the sample rate passed to the instrument
     */
    private int channels;
    /**
     * the amount of noise modulation (0 - 1)
     */
    private float depth = (float) 0.0;

    //----------------------------------------------
    // Constructor
    //----------------------------------------------

    /**
     * Basic default constructor to set an initial
     * sampling rate.
     *
     * @param sampleRate
     * @param depth
     */
    public AMNoiseInst(int sampleRate, double depth) {
        this.sampleRate = sampleRate;
        this.channels = 1;
        this.depth = (float) depth;
    }

    //----------------------------------------------
    // Methods
    //----------------------------------------------

    /**
     * Initialisation method used to build the objects that
     * this instrument will use.
     */
    public void createChain() {
        // modulator
        Noise noise = new Noise(this, Noise.FRACTAL_NOISE, this.sampleRate, this.channels);
        Envelope modEnv = new Envelope(noise,
                new double[]{0.0, 0.0, 0.5, 1.0, 1.0, 1.0});
        Volume modVol = new Volume(modEnv, (float) this.depth); // respond to note dynamic
        // constant
        Value offsetAmp = new Value(this, this.sampleRate, this.channels, (float) 0.5);
        AudioObject[] grp1 = {modVol, offsetAmp};
        Add add = new Add(grp1);
        // carrier
        Oscillator carrier = new Oscillator(add,
                Oscillator.SINE_WAVE, WaveTable.AMPLITUDE);
        Envelope env = new Envelope(carrier,
                new double[]{0.0, 0.0, 0.5, 1.0, 1.0, 0.0});
        Volume vol = new Volume(env, (float) 1.0);
        StereoPan span = new StereoPan(vol);
        SampleOut sout = new SampleOut(span);
    }
}