tf_state.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_STATE_H
#define TUNEFISH_STATE_H

class State
{
public:
   State();
   ~State();

   struct FilterState
   {
      // LFO values
      float       m_fltLFOPos;
      float       m_fltFinalFreq;
      float       m_fltFinalRes;

      // 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;
   };

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

   // Oscillator frequencies
   float          m_OscFreq[3]; 
   float          m_OscStep[3];
   float          m_OscPosR[3];
   float          m_OscPosL[3];

   // Filters
   FilterState    m_LPState;
   FilterState    m_HPState;

   // Amp volume
   float          m_fltVolume;

   // LFO states
   float          m_LFOState[6];

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

   void           reset(Generator *gen, float fltFrequency);
};

#endif