tf_highpass.h

一个96K的3D游戏源码

/* ###########################################################################
*
*    ------  /   /  /\   /  /---  -----  /  ----  /   /
*       /   /   /  /  \ /  /---   -/-   /   \--  /---/
*      /    \---  /    /  /---    /    /  ----/ /   /
*
*       t i n y   m u s i c   s y n t h e s i z e r 
* 
* Copyright 2004, Christian Loos
* [e-mail]
*
* ########################################################################### */

#ifndef TUNEFISH_HIGHPASS_H
#define TUNEFISH_HIGHPASS_H

class Highpass : public Filter
{
public:
   Highpass();
   ~Highpass();

   // ---------------------------------------------------------------
   //    Variables
   // ---------------------------------------------------------------

   float       m_fltFrequency;
   float       m_fltResonance;
   float       m_fltLFORate;
   float       m_fltLFODepth;

   // LFO values
   float       m_fltLFOPos;
   float       m_fltFinalFreq;

   // Filter coefficients
   float       m_fltA1;
   float       m_fltA2;
   float       m_fltA3;
   float       m_fltB1;
   float       m_fltB2;

   // previous inputs/outputs
   float       m_fltIN1_r;
   float       m_fltIN2_r;
   float       m_fltOUT1_r;
   float       m_fltOUT2_r;
   float       m_fltIN1_l;
   float       m_fltIN2_l;
   float       m_fltOUT1_l;
   float       m_fltOUT2_l;

   // ---------------------------------------------------------------
   //    Functions
   // ---------------------------------------------------------------

   void        setup(float frequency, float resonance, float lforate, float lfodepth);
   void        update();
   void        process(DWORD len);
};

#endif