Version 0.99

DCBlock.cpp

@@ -0,0 +1,41 @@
+/*******************************************/
+/*  DC Blocking Filter                     */ 
+/*  by Perry R. Cook, 1995-96              */ 
+/*  This guy is very helpful in, uh,       */
+/*  blocking DC.  Needed because a simple  */
+/*  low-pass reflection filter allows DC   */
+/*  to build up inside recursive           */ 
+/*  structures.                            */
+/*******************************************/
+
+#include "DCBlock.h"
+
+DCBlock :: DCBlock()
+{
+    inputs = (MY_FLOAT *) malloc(MY_FLOAT_SIZE);
+    outputs = (MY_FLOAT *) malloc(MY_FLOAT_SIZE);
+    this->clear();
+
+}
+
+DCBlock :: ~DCBlock()
+{
+    free(inputs);
+    free(outputs);
+}
+
+void DCBlock :: clear()
+{
+    outputs[0] = 0.0;
+    inputs[0] = 0.0;
+    lastOutput = 0.0;
+}
+
+MY_FLOAT DCBlock :: tick(MY_FLOAT sample)    
+{
+    outputs[0] = sample - inputs[0] + (0.99 * outputs[0]);
+    inputs[0] = sample;
+    lastOutput = outputs[0];
+    return lastOutput;
+}
+