peacock/plugin/ic29.hpp

/*
   Peacock-8 VA polysynth

   Copyright 2024 Gordon JC Pearce <gordonjcp@gjcp.net>

   Permission to use, copy, modify, and/or distribute this software for any
   purpose with or without fee is hereby granted, provided that the above
   copyright notice and this permission notice appear in all copies.

   THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
   SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
   OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
   CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#pragma once

#include "peacock.hpp"

class Envelope {
   public:
    Envelope();
    void run();
    void gate(uint8_t gate);
    uint16_t level;

   //private:
    enum {
        ENV_ATK,
        ENV_DCY,
        ENV_RLS,
        ENV_IDLE
    } phase;
};

class Voice {
   public:
    Voice();
    void run();
    uint8_t note;

   //private:
    Envelope env;    // calculated envelope value
    uint16_t pitch;  // calculated pitch value with porta and master pitch etc
    enum { V_DONE,
           V_OFF,
           V_ON } voiceState;
};

class Synth {
    friend Envelope;
    friend Peacock;

   public:
    Synth();
    void run();
    void voiceOn(uint8_t voice, uint8_t note);
    void voiceOff(uint8_t voice);
    void sustainSwitch(uint8_t val);
    void pitchBend(int16_t bend);
    void modWheel(uint8_t wheel);
    uint16_t masterPitch;  // sum of bend and LFO, plus any other pitch-setting value
   protected:
    uint16_t envAtk, envDcy, envStn, envRls;

   private:
    Voice voices[NUM_VOICES];
    void runLfo();
    void runEnvelope(Voice voice);
};

// global
extern Synth s;