// #15 ADSR2 enveloppe. DittyToy 2022.
// The MIT License.
//
// https://dittytoy.net/ditty/0f2e4c2cdd
//
// The ADSR2 envelope is added to Dittytoy to have an envelope compatible with the default envelope
// used in Sonic Pi. The ADSR2 envelope works similarly to the ADSR envelope, but the most
// significant difference is that all durations are in ticks.
//
// adsr      envelope: https://dittytoy.net/ditty/34e1600f63
// adsr2     envelope: https://dittytoy.net/ditty/0f2e4c2cdd
// segmented envelope: https://dittytoy.net/ditty/ce63852ccf
//
// https://sonic-pi.net/tutorial.html#section-2-4
// https://dittytoy.net/syntax#envelopes
//

input.attack_time   = 0.1;  // min=0, max=0.2, step=0.001
input.attack_level  = 1;    // min=0, max=1, step=0.001
input.decay_time    = 0.2;  // min=0, max=2, step=0.001
input.decay_level   = 0.75; // min=0, max=1, step=0.001
input.sustain_time  = 0;    // min=0, max=2, step=0.001
input.sustain_level = 0.5;  // min=0, max=1, step=0.001
input.release       = 0.5;  // min=0, max=2, step=0.001

// signalProbe - by athibaul
const signalProbe = filter.def(  
    class {
        process(input) {
            debug.probe('signal', input[0]+input[1], 2, 1);
            return input;
        }   
    });

loop( () => {
    sine.play(c, { 
        attack:         input.attack_time,    // in ticks
        attack_level:   input.attack_level,
        decay:          input.decay_time,     // in ticks
        decay_level:    input.decay_level,
        sustain:        input.sustain_time,   // in ticks
        sustain_level:  input.sustain_level,
        release:        input.release,        // in ticks 
        env:            adsr2
    });
    sleep( input.attack_time + input.decay_time + input.sustain_time + input.release + 1);
}, { name: 'ADSR2 envelope' }).connect( signalProbe.create() );