Version 3.0

effects/Chorus.cpp

@@ -0,0 +1,125 @@
+/******************************************/  
+/*  Chorus Effect Applied to Soundfile    */
+/*  by Perry Cook, 1996                   */
+/******************************************/
+
+#include "Chorus.h"
+
+Chorus :: Chorus(MY_FLOAT baseDelay)
+{
+  delayLine[0] = new DLineL((long) (baseDelay * 1.414) + 2);
+  delayLine[1] = new DLineL((long) (baseDelay) + 2);
+  delayLine[0]->setDelay(baseDelay);
+  delayLine[1]->setDelay(baseDelay);
+  baseLength = baseDelay;
+
+  // Concatenate the STK RAWWAVE_PATH to the rawwave file
+  char temp[128];
+  strcpy(temp, RAWWAVE_PATH);
+  mods[0] = new RawWvIn(strcat(temp,"rawwaves/sinewave.raw"),"looping");
+  strcpy(temp, RAWWAVE_PATH);
+  mods[1] = new RawWvIn(strcat(temp,"rawwaves/sinewave.raw"),"looping");
+  mods[0]->normalize();
+  mods[1]->normalize();
+  mods[0]->setFreq(0.2);
+  mods[1]->setFreq(0.222222);
+  modDepth = 0.05;
+  effectMix = (MY_FLOAT) 0.5;
+  this->clear();
+}
+
+Chorus :: ~Chorus()
+{
+  delete delayLine[0];
+  delete delayLine[1];
+  delete mods[0];
+  delete mods[1];
+}
+
+void Chorus :: clear()
+{
+  delayLine[0]->clear();
+  delayLine[1]->clear();
+  lastOutL = (MY_FLOAT) 0.0;
+  lastOutR = (MY_FLOAT) 0.0;
+}
+
+void Chorus :: setEffectMix(MY_FLOAT mix)
+{
+  effectMix = mix;
+}
+
+void Chorus :: setModDepth(MY_FLOAT depth)
+{
+  modDepth = depth;
+}
+
+void Chorus :: setModFreq(MY_FLOAT freq)
+{
+  mods[0]->setFreq(freq);
+  mods[1]->setFreq(freq*1.1111);
+}
+
+MY_FLOAT Chorus :: lastOutput()
+{
+  return (lastOutL + lastOutR) * (MY_FLOAT) 0.5;
+}
+
+MY_FLOAT Chorus :: lastOutputL()
+{
+  return lastOutL;
+}
+
+MY_FLOAT Chorus :: lastOutputR()
+{
+  return lastOutR;
+}
+
+MY_FLOAT Chorus :: tick(MY_FLOAT input)
+{
+  delayLine[0]->setDelay(baseLength * 0.707 * (1.0 + mods[0]->tick()));
+  delayLine[1]->setDelay(baseLength  * 0.5 *  (1.0 - mods[1]->tick()));
+  lastOutL = input * (1.0 - effectMix);
+  lastOutL += effectMix * delayLine[0]->tick(input);
+  lastOutR = input * (1.0 - effectMix);
+  lastOutR += effectMix * delayLine[1]->tick(input);
+  return (lastOutL + lastOutR) * (MY_FLOAT) 0.5;
+}
+
+/**************  Test Main Program  *********************/
+/*
+int main(int argc, char *argv[])
+{
+    FILE *soundIn,*soundOut;
+    short data;
+    float efMix,maxDel;
+    Chorus *effect;    
+
+    if (argc==5)        {
+        soundIn = fopen(argv[3],"rb");
+        soundOut = fopen(argv[4],"wb");
+	if (soundIn && soundOut)	{
+	    efMix = atof(argv[1]);
+            maxDel = atof(argv[2]);
+            effect = new Chorus(maxDel);
+            effect->setEffectMix(efMix);
+            while (fread(&data,2,1,soundIn))     {
+                data = effect->tick(data);
+                fwrite(&data,2,1,soundOut);
+            }
+	    delete effect;
+	    fclose(soundIn);
+	    fclose(soundOut);
+	}
+        else	{
+            printf("Can't open one of the files\n");
+        }
+    }
+    else	{
+        printf("useage: Chorus        mix maxDelay soundIn.snd soundOut.snd\n");
+        printf("0.0 <= mix <= 1.0\n");
+        printf("maxDelay is in samples\n");
+        printf("soundfiles are 16 bit linear mono or stereo\n");
+    }
+}
+*/