andrewm@0: /*
andrewm@0:   This code accompanies the textbook:
andrewm@0:  
andrewm@0:   Digital Audio Effects: Theory, Implementation and Application
andrewm@0:   Joshua D. Reiss and Andrew P. McPherson
andrewm@0:  
andrewm@0:   ---
andrewm@0:  
andrewm@0:   Compressor: dynamic range compression effect
andrewm@0:   See textbook Chapter 6: Dynamics Processing
andrewm@0:  
andrewm@0:   Code by Joshua Reiss, Brecht de Man and Andrew McPherson
andrewm@0:  
andrewm@0:   ---
andrewm@0: 
andrewm@0:   This program is free software: you can redistribute it and/or modify
andrewm@0:   it under the terms of the GNU General Public License as published by
andrewm@0:   the Free Software Foundation, either version 3 of the License, or
andrewm@0:   (at your option) any later version.
andrewm@0:  
andrewm@0:   This program is distributed in the hope that it will be useful,
andrewm@0:   but WITHOUT ANY WARRANTY; without even the implied warranty of
andrewm@0:   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
andrewm@0:   GNU General Public License for more details.
andrewm@0: 
andrewm@0:   You should have received a copy of the GNU General Public License
andrewm@0:   along with this program.  If not, see <http://www.gnu.org/licenses/>.
andrewm@0: */
andrewm@0: 
andrewm@0: #ifndef __PLUGINPROCESSOR_H_88534BAA__
andrewm@0: #define __PLUGINPROCESSOR_H_88534BAA__
andrewm@0: 
andrewm@0: #include "../JuceLibraryCode/JuceHeader.h"
andrewm@0: #include <math.h>
andrewm@0: class CompressorAudioProcessor  : public AudioProcessor
andrewm@0: {
andrewm@0: public:
andrewm@0:     CompressorAudioProcessor();
andrewm@0:     ~CompressorAudioProcessor();
andrewm@0: 	
andrewm@0: 	int bufferSize;
andrewm@0: 	
andrewm@0:     void prepareToPlay (double sampleRate, int samplesPerBlock);
andrewm@0:     void releaseResources();
andrewm@0: 	void processBlock (AudioSampleBuffer& buffer, MidiBuffer& midiMessages);
andrewm@0: 	
andrewm@0: 	void compressor(AudioSampleBuffer &buffer, int m);// compressor functions
andrewm@0: 
andrewm@0: 	template <class T> const T& max ( const T& a, const T& b );
andrewm@0: 
andrewm@0:     AudioProcessorEditor* createEditor();
andrewm@0: 
andrewm@0:     bool hasEditor() const;
andrewm@0: 
andrewm@0: 	AudioPlayHead::CurrentPositionInfo lastPosInfo;
andrewm@0:  
andrewm@0: 	int round(float inn);
andrewm@0:     const String getName() const;
andrewm@0: 
andrewm@0:     int getNumParameters();
andrewm@0: 
andrewm@0:     float getParameter (int index);
andrewm@0:     void setParameter (int index, float newValue);
andrewm@0: 
andrewm@0:     const String getParameterName (int index);
andrewm@0:     const String getParameterText (int index);
andrewm@0: 
andrewm@0:     const String getInputChannelName (int channelIndex) const;
andrewm@0:     const String getOutputChannelName (int channelIndex) const;
andrewm@0:     bool isInputChannelStereoPair (int index) const;
andrewm@0:     bool isOutputChannelStereoPair (int index) const;
andrewm@0: 
andrewm@0:     bool silenceInProducesSilenceOut() const;
andrewm@0:     double getTailLengthSeconds() const;
andrewm@0:     bool acceptsMidi() const;
andrewm@0:     bool producesMidi() const;
andrewm@0: 
andrewm@0:     int getNumPrograms();
andrewm@0:     int getCurrentProgram();
andrewm@0:     void setCurrentProgram (int index);
andrewm@0:     const String getProgramName (int index);
andrewm@0:     void changeProgramName (int index, const String& newName);
andrewm@0: 
andrewm@0:     //==============================================================================
andrewm@0:     void getStateInformation (MemoryBlock& destData);
andrewm@0:     void setStateInformation (const void* data, int sizeInBytes);
andrewm@0: 
andrewm@0: 	float getThreshold();
andrewm@0: 	float getRatio();
andrewm@0: 	float getGain();
andrewm@0: 	float getAttackTime();
andrewm@0: 	float getReleaseTime();
andrewm@0: 	void setThreshold(float T);
andrewm@0: 	void setGain(float G);
andrewm@0: 	void setRatio(float R);
andrewm@0: 	void setAttackTime(float A);
andrewm@0: 	void setReleaseTime(float R);
andrewm@0: 	void resetAll();
andrewm@0: 
andrewm@0: 	// parameters
andrewm@0: 
andrewm@0: 	bool compressorONOFF;
andrewm@0: 	int M;
andrewm@0: 	bool autoTime;
andrewm@0: 
andrewm@0: private:
andrewm@0:     AudioSampleBuffer inputBuffer;
andrewm@0: 
andrewm@0: //	int bufferSize;
andrewm@0:     //these are used to persist UI's size- values are stored along with filter's other parameters, and UI component will update them when it gets resized.
andrewm@0: 	int lastUIWidth, lastUIHeight;
andrewm@0: 		
andrewm@0: 	HeapBlock <float> x_g, x_l,y_g, y_l,c;// input, output, control
andrewm@0: 		// parameters
andrewm@0: 	float ratio,threshold,makeUpGain,tauAttack,tauRelease,alphaAttack,alphaRelease,yL_prev;
andrewm@0: 	int nhost;
andrewm@0: 	int samplerate;
andrewm@0: 
andrewm@0: 	JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (CompressorAudioProcessor);
andrewm@0: };
andrewm@0: 
andrewm@0: #endif  // __PLUGINPROCESSOR_H_88534BAA__