StutterPatch.hpp

////////////////////////////////////////////////////////////////////////////////////////////////////

/*
 
 
 LICENSE:
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 */


/* created by the OWL team 2014 */


////////////////////////////////////////////////////////////////////////////////////////////////////


#ifndef __StutterPatch_hpp__
#define __StutterPatch_hpp__

#include "StompBox.h"

class StutterPatch : public Patch {
private:
    CircularBuffer stutterBuffer;
    bool  thresholdBreached;
    int bufferFillIndex = 0;
    int bufferReadIndex = 0;

public:
  StutterPatch(){
      thresholdBreached =  true;
       registerParameter(PARAMETER_A, "Blend");
    registerParameter(PARAMETER_B, "Speed");
    registerParameter(PARAMETER_C, "Length");
    registerParameter(PARAMETER_D, "Fade");
      registerParameter(PARAMETER_E, "threshold");
    AudioBuffer* buffer = createMemoryBuffer(1, REQUEST_BUFFER_SIZE);
    stutterBuffer.initialise(buffer->getSamples(0), buffer->getSize());
      
  }
    
    
  void processAudio(AudioBuffer &buffer){ // put your code here!
      float Blend, Speed, Length, Fade, Threshold;
     
      bool stutterReady = false;
    //  bool clipFlag = false;
      Blend = getParameterValue(PARAMETER_A);
      Speed = getParameterValue(PARAMETER_B);
      Length = getParameterValue(PARAMETER_C);
      Fade = getParameterValue(PARAMETER_D);
      Threshold = 1;
      
      int maxGrain = getBlockSize() * (0.100/(getBlockSize() * (1/getSampleRate())));// 100mS
      
      float* x = buffer.getSamples(0);
      float y = 0;
      int size = buffer.getSize();
              if(thresholdBreached == true)
      {
        bufferFillIndex += fillBuffer(x, maxGrain, size);
          if(bufferFillIndex == maxGrain)
          {
           
              stutterReady = true;
              bufferReadIndex = 0;
              bufferFillIndex = 0;
          }
      }
      
     
      for (int n = 0; n < size; n++)
      {
          
         if(stutterReady)
         {
             
         y  = (stutterBuffer.read(bufferReadIndex) * 0.7) ;
         
             x[n] = (y *  (1 - Blend)) +  (x[n] * Blend);
         }
        
          if(stutterReady == false)
          {
              x[n] *= Blend;
          }
          
         
          if( abs(x[n])>Threshold)
          {
              
              thresholdBreached = true;
              stutterReady = false;
          }
          
          
          bufferReadIndex++;
          
          if(bufferReadIndex >= (maxGrain * Length))
          {
              bufferReadIndex = 0;
          }

      }
      
};
    
int fillBuffer(float* x, int maxGrain, int size)
    {
        int i = 0;
       
            
        for( int n = 0; n < size; n++)
        {
            stutterBuffer.write(x[n]);
            i++;
        }
            
        
        
        return i ;
    }
#endif // __TemplatePatch_hpp__