mirror of
https://github.com/DrBeef/Raze.git
synced 2024-12-15 23:21:21 +00:00
66 lines
1.4 KiB
C++
66 lines
1.4 KiB
C++
// Turbo Grafx 16 (PC Engine) PSG sound chip emulator
|
|
|
|
// Game_Music_Emu https://bitbucket.org/mpyne/game-music-emu/
|
|
#ifndef HES_APU_H
|
|
#define HES_APU_H
|
|
|
|
#include "blargg_common.h"
|
|
#include "Blip_Buffer.h"
|
|
|
|
struct Hes_Osc
|
|
{
|
|
unsigned char wave [32];
|
|
short volume [2];
|
|
int last_amp [2];
|
|
int delay;
|
|
int period;
|
|
unsigned char noise;
|
|
unsigned char phase;
|
|
unsigned char balance;
|
|
unsigned char dac;
|
|
blip_time_t last_time;
|
|
|
|
Blip_Buffer* outputs [2];
|
|
Blip_Buffer* chans [3];
|
|
unsigned noise_lfsr;
|
|
unsigned char control;
|
|
|
|
enum { amp_range = 0x8000 };
|
|
typedef Blip_Synth<blip_med_quality,1> synth_t;
|
|
|
|
void run_until( synth_t& synth, blip_time_t );
|
|
};
|
|
|
|
class Hes_Apu {
|
|
public:
|
|
void treble_eq( blip_eq_t const& );
|
|
void volume( double );
|
|
|
|
enum { osc_count = 6 };
|
|
void osc_output( int index, Blip_Buffer* center, Blip_Buffer* left, Blip_Buffer* right );
|
|
|
|
void reset();
|
|
|
|
enum { start_addr = 0x0800 };
|
|
enum { end_addr = 0x0809 };
|
|
void write_data( blip_time_t, int addr, int data );
|
|
|
|
void end_frame( blip_time_t );
|
|
|
|
public:
|
|
Hes_Apu();
|
|
private:
|
|
Hes_Osc oscs [osc_count];
|
|
int latch;
|
|
int balance;
|
|
Hes_Osc::synth_t synth;
|
|
|
|
void balance_changed( Hes_Osc& );
|
|
void recalc_chans();
|
|
};
|
|
|
|
inline void Hes_Apu::volume( double v ) { synth.volume( 1.8 / osc_count / Hes_Osc::amp_range * v ); }
|
|
|
|
inline void Hes_Apu::treble_eq( blip_eq_t const& eq ) { synth.treble_eq( eq ); }
|
|
|
|
#endif
|