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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 FMNoiseInst 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;
    private int modIndex;

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

    /**
     * Basic default constructor to set an initial
     * sampling rate.
     *
     * @param sampleRate
     */
    public FMNoiseInst(int sampleRate, int modIndex, int channels) {
        this.sampleRate = sampleRate;
        this.channels = channels;
        this.modIndex = modIndex;
    }

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

    /**
     * Initialisation method used to build the objects that
     * this instrument will use.
     */
    public void createChain() {
        // modulator
        Noise modulator = new Noise(this, Noise.STEP_NOISE, this.sampleRate, this.channels);
        //modulator.setFrqRatio(frqRatio);
        modulator.setAmp((float) modIndex);
        Envelope env = new Envelope(modulator, new double[]{0.0, 1.0, 1.0, 0.0});

        // constant
        Value constFreq = new Value(this, this.sampleRate, this.channels, Value.NOTE_PITCH);
        Add add = new Add(new AudioObject[]{constFreq, env});

        // carrier
        Oscillator carrier = new Oscillator(add, Oscillator.SINE_WAVE, Oscillator.FREQUENCY);
        Envelope env2 = new Envelope(carrier, new double[]{0.0, 0.0, 0.02, 1.0, 1.0, 0.0});
        Volume amp = new Volume(env2);
        StereoPan pan = new StereoPan(amp);
        SampleOut sout = new SampleOut(pan);
    }
}