seiichi horie
Experimental implementation of the adaptive filter of "Interface" magazine in 2016-2017
Dependencies: amakusa mbed-dsp mbed shimabara ukifune unzen_nucleo_f746
Fork of
skeleton_unzen_nucleo_f746
by 
seiichi horie
ハードウェアおよびソフトウェアはskelton_unzen_nucleo_f746を基本にしています。
Diff: dcblocker.cpp
- Revision:
- 20:699e209fd19a
- Parent:
- 19:f5e785fe50b1
--- a/dcblocker.cpp Fri Feb 03 14:35:46 2017 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,29 +0,0 @@
-#include "signal_processing.h"
-
-/*
-* Related Link
-* https://www.dsprelated.com/freebooks/filters/DC_Blocker.html
-* https://ccrma.stanford.edu/~jos/fp/DC_Blocker.html
-*/
-
-DCBlocker::DCBlocker( uint32_t blockSize ) : amakusa::AbstractFilter ( blockSize )
-{
- this->x_last = 0;
- this->y_last = 0;
-}
-
-void DCBlocker::run( float32_t *pSrc, float32_t *pDst, uint32_t blockSize )
-{
- // if the parameter is non-zero, take it. If the parameter is zero, use default.
- if ( blockSize == 0 )
- blockSize = this->blockSize;
-
- for ( int i = 0; i < blockSize; i++ )
- {
- // y = x - x * z^-1 + 0.995 * y * z^-1
- pDst[ i ] = pSrc[ i ] - this->x_last + 0.995f * this->y_last;
- this->x_last = pSrc[ i ];
- this->y_last = pDst[ i ];
- }
-
-}