text: /**
   * The MIT License (MIT)
   *
   * Copyright (c) 2013-2020 Igor Zinken - https://www.igorski.nl
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy of
   * this software and associated documentation files (the "Software"), to deal in
   * the Software without restriction, including without limitation the rights to
   * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
   * the Software, and to permit persons to whom the Software is furnished to do so,
   * subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
   * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
   * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
   * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  #ifndef __MWENGINE__PHASER_H_INCLUDED__
  #define __MWENGINE__PHASER_H_INCLUDED__
  
  #include "baseprocessor.h"
  #include <vector>
  
  namespace MWEngine {
  class AllPassDelay
  {
      public:
          AllPassDelay();
          void delay( SAMPLE_TYPE aDelay );
          SAMPLE_TYPE update( SAMPLE_TYPE aSample );
  
      private:
          SAMPLE_TYPE _a1;
          SAMPLE_TYPE _zm1;
  };
  
  class Phaser : public BaseProcessor
  {
      static const int STAGES = 6;
  
      public:
          Phaser( float aRate, float aFeedback, float aDepth, float aMinFreq, float aMaxFreq );
          Phaser( float aRate, float aFeedback, float aDepth, float aMinFreq, float aMaxFreq, int amountOfChannels );
          ~Phaser();
  
          std::string getType() {
              return std::string( "Phaser" );
          }
  
          void setDepth( float depth );
          float getDepth();
          void setFeedback( float fb );
          float getFeedback();
          void setRate( float aRate );
          float getRate();
          void setRange( float aMin, float aMax );
  
  #ifndef SWIG
          // internal to the engine
          void process( AudioBuffer* sampleBuffer, bool isMonoSource );
  #endif
  
      private:
          int _amountOfChannels;
          SAMPLE_TYPE _dmin;
          SAMPLE_TYPE _dmax;
          SAMPLE_TYPE _fb;
          SAMPLE_TYPE _depth;
          SAMPLE_TYPE _zm1;
          SAMPLE_TYPE _lfoPhase;
          SAMPLE_TYPE _lfoInc;
          SAMPLE_TYPE _rate;
  
          std::vector<std::vector<AllPassDelay*>>* _alps;
  
          void init( float aRate, float aFeedback, float aDepth, float aMinFreq, float aMaxFreq, int amountOfChannels );
  };
  } // E.O namespace MWEngine
  
  #endif
  