SynthVoice.h

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/*
 ==============================================================================
 
 This file is part of the iPlug 2 library. Copyright (C) the iPlug 2 developers.
 
 See LICENSE.txt for  more info.
 
 ==============================================================================
 */
 
#pragma once
 
#include <array>
#include <vector>
#include <stdint.h>
 
#include "ptrlist.h"
 
#include "IPlugConstants.h"
#include "IPlugMidi.h"
#include "IPlugLogger.h"
 
#include "IPlugQueue.h"
#include "ControlRamp.h"
 
BEGIN_IPLUG_NAMESPACE
 
namespace voiceControlNames
{
  enum eControlNames
  {
    kVoiceControlGate = 0,
    kVoiceControlPitch,
    kVoiceControlPitchBend,
    kVoiceControlPressure,
    kVoiceControlTimbre,
    kNumVoiceControlRamps
  };
}
 
using namespace voiceControlNames;
 
using VoiceInputs = ControlRamp::RampArray<kNumVoiceControlRamps>;
 
#pragma mark - Voice class
 
class SynthVoice
{
public:
 
  virtual ~SynthVoice() {};
 
  virtual bool GetBusy() const = 0;
 
  virtual void Trigger(double level, bool isRetrigger) {};
 
  virtual void Release() {};
 
  virtual void ProcessSamplesAccumulating(sample** inputs, sample** outputs, int nInputs, int nOutputs, int startIdx, int nFrames)
  {
    for (auto c = 0; c < nOutputs; c++)
    {
      for (auto s = startIdx; s < startIdx + nFrames; s++)
      {
        outputs[c][s] += 0.; // if you are following this no-op example, remember you need to accumulate the output of all the different voices
      }
    }
  }
 
  virtual void SetSampleRateAndBlockSize(double sampleRate, int blockSize) {};
 
  virtual void SetProgramNumber(int pgm) {};
 
  virtual void SetControl(int controlNumber, float value) {};
 
protected:
  VoiceInputs mInputs;
  int64_t mLastTriggeredTime{-1};
  uint8_t mVoiceNumber{0};
  uint8_t mZone{0};
  uint8_t mChannel{0};
  uint8_t mKey{0};
  double mBasePitch{0.};
  double mGain{0.}; // used by voice allocator to hard-kill voices.
 
  friend class MidiSynth;
  friend class VoiceAllocator;
};
 
END_IPLUG_NAMESPACE