mirror of
https://git.do.srb2.org/KartKrew/Kart-Public.git
synced 2024-12-26 12:21:19 +00:00
102 lines
2.2 KiB
C++
102 lines
2.2 KiB
C++
// Namco 106 sound chip emulator
|
|
|
|
// Nes_Snd_Emu 0.1.8
|
|
#ifndef NES_NAMCO_APU_H
|
|
#define NES_NAMCO_APU_H
|
|
|
|
#include "blargg_common.h"
|
|
#include "Blip_Buffer.h"
|
|
|
|
struct namco_state_t;
|
|
|
|
class Nes_Namco_Apu {
|
|
public:
|
|
// See Nes_Apu.h for reference.
|
|
void volume( double );
|
|
void treble_eq( const blip_eq_t& );
|
|
void output( Blip_Buffer* );
|
|
enum { osc_count = 8 };
|
|
void osc_output( int index, Blip_Buffer* );
|
|
void reset();
|
|
void end_frame( blip_time_t );
|
|
|
|
// Read/write data register is at 0x4800
|
|
enum { data_reg_addr = 0x4800 };
|
|
void write_data( blip_time_t, int );
|
|
int read_data();
|
|
|
|
// Write-only address register is at 0xF800
|
|
enum { addr_reg_addr = 0xF800 };
|
|
void write_addr( int );
|
|
|
|
// to do: implement save/restore
|
|
void save_state( namco_state_t* out ) const;
|
|
void load_state( namco_state_t const& );
|
|
|
|
public:
|
|
Nes_Namco_Apu();
|
|
BLARGG_DISABLE_NOTHROW
|
|
private:
|
|
// noncopyable
|
|
Nes_Namco_Apu( const Nes_Namco_Apu& );
|
|
Nes_Namco_Apu& operator = ( const Nes_Namco_Apu& );
|
|
|
|
struct Namco_Osc {
|
|
blargg_long delay;
|
|
Blip_Buffer* output;
|
|
short last_amp;
|
|
short wave_pos;
|
|
};
|
|
|
|
Namco_Osc oscs [osc_count];
|
|
|
|
blip_time_t last_time;
|
|
int addr_reg;
|
|
|
|
enum { reg_count = 0x80 };
|
|
BOOST::uint8_t reg [reg_count];
|
|
Blip_Synth<blip_good_quality,15> synth;
|
|
|
|
BOOST::uint8_t& access();
|
|
void run_until( blip_time_t );
|
|
};
|
|
/*
|
|
struct namco_state_t
|
|
{
|
|
BOOST::uint8_t regs [0x80];
|
|
BOOST::uint8_t addr;
|
|
BOOST::uint8_t unused;
|
|
BOOST::uint8_t positions [8];
|
|
BOOST::uint32_t delays [8];
|
|
};
|
|
*/
|
|
|
|
inline BOOST::uint8_t& Nes_Namco_Apu::access()
|
|
{
|
|
int addr = addr_reg & 0x7F;
|
|
if ( addr_reg & 0x80 )
|
|
addr_reg = (addr + 1) | 0x80;
|
|
return reg [addr];
|
|
}
|
|
|
|
inline void Nes_Namco_Apu::volume( double v ) { synth.volume( 0.10 / osc_count * v ); }
|
|
|
|
inline void Nes_Namco_Apu::treble_eq( const blip_eq_t& eq ) { synth.treble_eq( eq ); }
|
|
|
|
inline void Nes_Namco_Apu::write_addr( int v ) { addr_reg = v; }
|
|
|
|
inline int Nes_Namco_Apu::read_data() { return access(); }
|
|
|
|
inline void Nes_Namco_Apu::osc_output( int i, Blip_Buffer* buf )
|
|
{
|
|
assert( (unsigned) i < osc_count );
|
|
oscs [i].output = buf;
|
|
}
|
|
|
|
inline void Nes_Namco_Apu::write_data( blip_time_t time, int data )
|
|
{
|
|
run_until( time );
|
|
access() = data;
|
|
}
|
|
|
|
#endif
|