Mark Howell / biquad

Biquad filter library in C++ template form. On mbed LPC1768, can run about 100K operations per second with double precision float, or about 200K with single precision float.

Dependents:   EMG_Wiesje

Diff: biquad.h

Revision:
2:9a9b643fcc66
Parent:
1:9c0546cd518e
Child:
3:abd20f34fd68
--- a/biquad.h	Tue Feb 14 23:23:42 2012 +0000
+++ b/biquad.h	Wed Feb 15 18:12:50 2012 +0000
@@ -12,6 +12,9 @@
  *
  */
 
+#ifndef __BIQUAD_H_
+#define __BIQUAD_H_
+
 #include <math.h>
 
 #ifndef M_LN2
@@ -43,7 +46,7 @@
         T srate,  /* sampling rate */
         T bandwidth); /* bandwidth in octaves */
         
-    void Reset(BIQUAD_FILTER_TYPE type, T dbGain, T freq, T srate, T bandwidth);
+    void Reset(BIQUAD_FILTER_TYPE type, T dbGain, T freq, T srate, T bandwidth, bool clearHistory = false);
     
     T Calculate(T sample);
     
@@ -51,3 +54,6 @@
     T x1, x2, y1, y2;
 
 };
+
+#endif
+