45 lines
1.0 KiB
C++
45 lines
1.0 KiB
C++
// YM2612 FM sound chip emulator
|
|
|
|
// Game_Music_Emu $vers
|
|
#ifndef YM2612_EMU_H
|
|
#define YM2612_EMU_H
|
|
|
|
// Gens is buggy and inaccurate, but faster
|
|
// #define USE_GENS
|
|
#ifdef USE_GENS
|
|
struct Ym2612_Impl;
|
|
#else
|
|
typedef void Ym2612_Impl;
|
|
#endif
|
|
|
|
class Ym2612_Emu {
|
|
Ym2612_Impl* impl;
|
|
public:
|
|
Ym2612_Emu() { impl = 0; }
|
|
~Ym2612_Emu();
|
|
|
|
// Sets sample rate and chip clock rate, in Hz. Returns non-zero
|
|
// if error. If clock_rate=0, uses sample_rate*144
|
|
const char* set_rate( double sample_rate, double clock_rate = 0 );
|
|
|
|
// Resets to power-up state
|
|
void reset();
|
|
|
|
// Mutes voice n if bit n (1 << n) of mask is set
|
|
enum { channel_count = 6 };
|
|
void mute_voices( int mask );
|
|
|
|
// Writes addr to register 0 then data to register 1
|
|
void write0( int addr, int data );
|
|
|
|
// Writes addr to register 2 then data to register 3
|
|
void write1( int addr, int data );
|
|
|
|
// Runs and adds pair_count*2 samples into current output buffer contents
|
|
typedef short sample_t;
|
|
enum { out_chan_count = 2 }; // stereo
|
|
void run( int pair_count, sample_t* out );
|
|
};
|
|
|
|
#endif
|