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//==========================================================
// File:                 ChiffInst.java
// Package:              inst
// Function:             basic implementation of a white noise burst
// Author:               Andrew Brown
// Environment:          JDK1.1 / jMusic 1.1
//==========================================================

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

/**
 * A basic white noise synthesis implementation
 * which provides an onset burst of noise.
 *
 * @author Andrew Brown
 */

public final class ChiffInst extends Instrument {
    //----------------------------------------------
    // Attributes
    //----------------------------------------------

    /**
     * The points to use in the construction of Envelopes
     */
    private EnvPoint[] pointArray = new EnvPoint[10];
    private int channels;
    private int sampleRate;

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

    /**
     * Basic default constructor to set an initial
     * sampling rate.
     *
     * @param sampleRate
     */
    public ChiffInst(int sampleRate) {
        this(sampleRate, 2);
    }

    /**
     * A second constructor to set an initial
     * sampling rate and number of channels.
     *
     * @param sampleRate
     * @param channels   (i.e., 1 = mono, 2 = stereo)
     */
    public ChiffInst(int sampleRate, int channels) {
        this.sampleRate = sampleRate;
        this.channels = channels;
        EnvPoint[] tempArray = {
                new EnvPoint((float) 0.0, (float) 0.0),
                new EnvPoint((float) 0.03, (float) 0.6),
                new EnvPoint((float) 0.1, (float) 0.01),
                new EnvPoint((float) 1.0, (float) 0.0)
        };
        pointArray = tempArray;
    }

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

    /**
     * Initialisation method used to build a chain of the objects that
     * this instrument will use.
     */
    public void createChain() {
        Noise noise = new Noise(this, Noise.WHITE_NOISE, this.sampleRate, this.channels);
        Envelope env = new Envelope(noise, pointArray);
        Volume vol = new Volume(env, (float) 1.0);
        StereoPan span = new StereoPan(vol);
        SampleOut sout = new SampleOut(span);
    }
}