MicroDexed/dx7note.h

/*
   Copyright 2016-2017 Pascal Gauthier.
   Copyright 2012 Google Inc.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

#ifndef SYNTH_DX7NOTE_H_
#define SYNTH_DX7NOTE_H_

// This is the logic to put together a note from the MIDI description
// and run the low-level modules.

// It will continue to evolve a bit, as note-stealing logic, scaling,
// and real-time control of parameters live here.

#include <Arduino.h>
#include "env.h"
#include "pitchenv.h"
#include "fm_core.h"

struct VoiceStatus {
  uint32_t amp[6];
  char ampStep[6];
  char pitchStep;
};

class Dx7Note {
  public:
    Dx7Note();
    void init(const uint8_t patch[156], int midinote, int velocity, int srcnote, int porta);

    // Note: this _adds_ to the buffer. Interesting question whether it's
    // worth it...
    void compute(int32_t *buf, int32_t lfo_val, int32_t lfo_delay, const Controllers *ctrls);

    void keyup();

    // TODO: some way of indicating end-of-note. Maybe should be a return
    // value from the compute method? (Having a count return from keyup
    // is also tempting, but if there's a dynamic parameter change after
    // keyup, that won't work.

    // PG:add the update
    void update(const uint8_t patch[156], int midinote, int velocity, int porta);
    void peekVoiceStatus(VoiceStatus &status);
    void transferState(Dx7Note& src);
    void transferSignal(Dx7Note &src);
    void transferPortamento(Dx7Note &src);
    void oscSync();

  private:
    Env env_[6];
    FmOpParams params_[6];
    PitchEnv pitchenv_;
    int32_t basepitch_[6];
    int32_t fb_buf_[2];
    int32_t fb_shift_;
    int32_t ampmodsens_[6];
    int32_t opMode[6];

    int ampmoddepth_;
    int algorithm_;
    int pitchmoddepth_;
    int pitchmodsens_;

    int porta_rateindex_;
    int porta_gliss_;
    int32_t porta_curpitch_[6];
};

#endif  // SYNTH_DX7NOTE_H_