tf_bandpass.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_BANDPASS_H
#define TUNEFISH_BANDPASS_H

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

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

   float       m_fltFrequency;
   float       m_fltGain;
   float       m_fltQ;

   float       m_fltLFORate;
   float       m_fltLFODepth;
   float       m_fltLFOPos;
   float       m_fltFinalFreq;

   //filter coefficients
   float       m_fltA0;
   float       m_fltA1;
   float       m_fltA2;
   float       m_fltB1;
   float       m_fltB2;

   // Previous inputs
   float       m_fltX1_L;
   float       m_fltX2_L;
   float       m_fltX1_R;
   float       m_fltX2_R;

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

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

#endif