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filters.h
00001 // 00002 // SYNTOPIA. See http://Syntopia.sourceforge.net for details and documentation. 00003 // 00004 // Author of this file: Mikael Hvidtfeldt Christensen (mikaelc@users.sourceforge.net) 00005 // 00006 00007 00008 00009 // Visual C++ compiler warnings: 255 char limit on var names..... 00010 #pragma warning(disable: 4786) 00011 00012 #ifndef __filters__ 00013 #define __filters__ 00014 00015 #include "Modules.h" 00016 #include "input.h" 00017 #include "output.h" 00018 #include "sndutils.h" 00019 #include <string> 00020 00021 namespace SynthCore { 00022 00023 class Module; 00024 00026 00032 class BiQuad : public Module { 00033 00034 private: 00035 00037 int UpdateCounter; 00038 00039 00040 public: 00041 00043 bool HACK; 00044 00046 float rez; 00048 float freq; 00049 00050 enum {lowpass,highpass,notch,bandpass2,bandpass1,allpass,highShelf,lowShelf,peakingEQ,bypass}; 00051 00053 int filterType; 00054 00056 virtual std::string getName() {return "BIQUAD";} 00057 00059 float dry; 00060 00062 Output * Output1; 00063 00065 Input * Input1; 00066 00068 Input * FreqInput; 00069 00073 Input * RezInput; 00074 00076 BiFilter * myFilter; 00077 00079 BiFilter * myFilter2; 00080 00082 static Module * newInstance(SynthVoice * S1) ; 00083 00084 00087 virtual Module * sharedClone() ; 00088 00089 00091 BiQuad(SynthVoice * S1) ; 00092 00094 ~BiQuad(); 00095 00097 void update() ; 00098 00100 void setDry(float s); 00101 00103 void setFreqAndRez(float frequence, float resonance); 00104 00108 void updateFreqAndRez(); 00109 00110 std::string getXML(int indent = 0) ; 00111 00113 void loadXML(XMLNode * n, bool firstPass); 00114 }; 00115 00116 00117 // ----------------------------------------------------------------------------- 00118 00119 /* 00120 class allpass : public Module { 00121 // This is a third order all pass filter. 00122 private: 00123 00124 00125 float fx,fy,z1x,z1y,plx,ply,a0,a1,a2,b1,b2,p1x,p1y; 00126 float output1,output2,output3,input1,input2,input3; 00127 00128 public: 00129 float dry; 00130 virtual std::string getName() {return "ALLPASS";} 00131 00132 00133 // Mono Module 00134 Output * Output1; 00135 Input * Input1; 00136 00137 // Constructor 00138 allpass(SynthVoice * S1) ; // We Need a pointer to Global Sample Step. 00139 00140 // Destructor; 00141 ~allpass() { 00142 delete Output1; 00143 delete Input1; 00144 }; 00145 00146 // Actual Code; 00147 void update() ; 00148 void setFreqAndRez(float rez, float freq); 00149 }; 00150 00151 // ----------------------------------------------------------------------------- 00152 00153 00154 00155 class comb : public Module { 00156 // Comb filter. 00157 private: 00158 float * bufferStart, * bufferEnd, * readPtr; 00159 00160 public: 00161 virtual std::string getName() {return "Comb";} 00162 00163 00164 float dry; 00165 float feedback; 00166 float output1; 00167 00168 // Mono Module 00169 Output * Output1; 00170 Input * Input1; 00171 00172 // Constructor 00173 comb(SynthVoice * S1) ; 00174 00175 // Destructor; 00176 ~comb() ; 00177 00178 // Actual Code; 00179 void update() ; 00180 }; 00181 */ 00182 00183 }; // end of namespace: SynthCore 00184 00185 #endif 00186
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