martin@0: /*
martin@0:  *  Decoder.h
martin@12:  *  ClassicAmbiDec
martin@0:  *
martin@0:  *  Created by Martin Morrell on 14/06/2012.
martin@0:  *  Copyright 2012 Queen Mary University of London. All rights reserved.
martin@0:  *
martin@0:  */
martin@0: 
martin@0: 
martin@0: class Decoder
martin@0: {	
martin@0: 	friend class MyEditor;
martin@0: public:
martin@12:     Decoder();
martin@12:     
martin@1:     //Transforms & Zoom
martin@0: 	double Rotate; //+/-180 degrees
martin@0: 	double Tilt; //+/-180 degrees
martin@0: 	double Tumble; //+/-180 degrees
martin@0: 	double Zoom; //+/-100
martin@0: 	int    ZoomMethod; //4 positions
martin@1:     
martin@1:     //Decoder Speaker Layout
martin@9:     int    decoderMode; //Decoder mode
martin@8:     int    channelOrder; //Natural or 5.1 ordering
martin@9:     int    mode5x; //Hidden mode for 5.x decoders accessed by programs
martin@1:     
martin@1:     //Front Stereo Speaker Decoding & Reverb
martin@0: 	double Width; //0-90 degrees
martin@0: 	double Pattern; //0-1 Omni amount
martin@0: 	int    Mode; //0 or 1 for xy or ms
martin@0: 	double RearVerb; //0-24dB
martin@0: 	double HiVerb; //0-24dB
martin@0: 	
martin@1:     //Centre Speaker Decoding
martin@1:     double centrePattern; //Centre mic pattern
martin@1:     double centreGain; //Centre mic gain
martin@1:     
martin@1:     //Subwoofer Signal
martin@1:     double subGain; //Subwoofer gain
martin@0:     
martin@1:     //Surround Speaker Decoding
martin@0:     int    surMode; //Rear mics mode
martin@0:     double surPattern; //Rear mics pattern
martin@0:     double surWidth; //Rear mics width
martin@0:     double surGain; //Rear mics gain
martin@0:     
martin@12:     //Filter Code
martin@1:     int Fs; //Sample Rate
martin@1:     int Fc; //Crossover Frequency
martin@0:     void   clearFilter(); //Clears the previous filter values
martin@12:     void filterCoefs(); //Calculates the filter coefficients
martin@0:     
martin@1: 	//Overall Decoding Functions
martin@12:     double output[6]; //Final Output
martin@8:     int processDecoder(double &w, double &x, double &y, double &z); //Called fucntion to do the decoding
martin@8:    
martin@0:     
martin@0: 	
martin@12: private:
martin@12:     //Conversion Functions
martin@0: 	double degRad(double angle); //Convert degreesto radians
martin@0: 	double radDeg(double angle); //Convert radians to degrees
martin@0: 	
martin@12: 	//Sound Field Rotations
martin@0: 	void rotateField(double &x, double &y);
martin@0: 	void tiltField(double &x, double &y);
martin@0: 	void tumbleField(double &x, double &y);
martin@0: 	
martin@0: 	//Zoom Methods
martin@0: 	void dominanceZoom(double &w, double &x, double &y, double &z);
martin@0: 	void pressZoom(double &w, double &x, double &y, double &z);
martin@0: 	void pushZoom(double &w, double &x, double &y, double &z);
martin@0: 	void focusZoom(double &w, double &x, double &y, double &z);
martin@0: 	
martin@0: 	//Stereo Decoders
martin@0: 	void xyDecode(double &w, double &x, double &y, double &z);
martin@0: 	void msDecode(double &w, double &x, double &y, double &z);
martin@0: 	
martin@0: 	//Reverbs
martin@0: 	void rearVerb(double &w, double &x, double &y, double &z);
martin@0: 	void hiVerb(double &w, double &x, double &y, double &z);
martin@0:     
martin@0:     //Surround
martin@0:     void centreMic(double &w, double &x);
martin@0:     void xySurDecode(double &w, double &x, double &y, double &z);
martin@0: 	void msSurDecode(double &w, double &x, double &y, double &z);
martin@0:     
martin@0:     //Filter Code
martin@11:     void filterLF(double &w);
martin@0:     void filterHF(double &w, double &x, double &y, double &z);
martin@12:     double bLF[3]; //b Coefficients for Lower Frequency Band
martin@12:     double bHF[3]; //b Coefficients for Higher Frequency Band
martin@12:     double a[3]; //a Coefficients
martin@12:     double prevInS[2]; //Previous Input LF Samples
martin@12:     double prevOutS[2]; //Previous Output LF Samples
martin@12:     double prevInw[2]; //Previous Input w Samples
martin@12:     double prevOutw[2]; //Previous Output w Samples
martin@12:     double prevInx[2]; //Previous Input x Samples
martin@12:     double prevOutx[2]; //Previous Output x Samples
martin@12:     double prevIny[2]; //Previous Input y Samples
martin@12:     double prevOuty[2]; //Previous Output y Samples
martin@12:     double prevInz[2]; //Previous Input z Samples
martin@12:     double prevOutz[2]; //Previous Output z Samples
martin@8:     
martin@8:     //Decoder Types
martin@12:     void monoDecoder(double &w, double &x, double &y, double &z); //Decode to mono, implemented but not used
martin@8: 	void stereoDecoder(double &w, double &x, double &y, double &z); //Decode to stereo
martin@8:     void twoOneDecoder(double &w, double &x, double &y, double &z); //Decode to stereo
martin@8:     void quadDecoder(double &w, double &x, double &y, double &z); //Decode to LRCS
martin@8:     void fiveDecoder(double &w, double &x, double &y, double &z); //Decode to 5.0
martin@8: 	void fiveOneDecoder(double &w, double &x, double &y, double &z); //Decode to 5.1
martin@9:     void heller1(double &w, double &x, double &y, double &z);
martin@9:     void heller2(double &w, double &x, double &y, double &z);
martin@12:     double outputL; //Left output
martin@12:     double outputR; //Right output
martin@12:     double outputC; //Centre output
martin@12:     double outputS; //Subwoofer output
martin@12:     double outputSL; //Surround Left output
martin@12:     double outputSR; //Surround Right output
martin@0: };