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

/**
 * A basic synthesis instrument implementation
 * which with a triable envelope.
 *
 * @author Andrew Brown
 */

public final class SlowSineInst extends jm.audio.Instrument {
    //----------------------------------------------
    // Attributes
    //----------------------------------------------
    /**
     * The points to use in the construction of Envelopes
     */
    private EnvPoint[] pointArray = new EnvPoint[10];
    /**
     * The number of channels
     */
    private int channels;
    /**
     * the sample rate passed to the instrument
     */
    private int sampleRate;

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

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

    /**
     * A constructor to set an initial
     * sampling rate and number of channels.
     *
     * @param sampleRate
     */
    public SlowSineInst(int sampleRate, int channels) {
        this.sampleRate = sampleRate;
        this.channels = channels;
        EnvPoint[] tempArray = {
                new EnvPoint((float) 0.0, (float) 0.0),
                new EnvPoint((float) 0.5, (float) 1.0),
                new EnvPoint((float) 1.0, (float) 0.0)
        };
        pointArray = tempArray;
    }

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

    /**
     * Initialisation method used to build the objects that
     * this instrument will use
     */
    public void createChain() {
        Oscillator wt = new Oscillator(this, Oscillator.SINE_WAVE,
                this.sampleRate, this.channels);
        Envelope env = new Envelope(wt, pointArray);
        Volume vol = new Volume(env);
        StereoPan span = new StereoPan(vol);
        SampleOut sout = new SampleOut(span);
    }
}