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// Nintendo NES/Famicom NSF music file emulator
// Game_Music_Emu 0.5.2
#ifndef NSF_EMU_H
#define NSF_EMU_H
#include "Classic_Emu.h"
#include "Nes_Apu.h"
#include "Nes_Cpu.h"
class Nsf_Emu : private Nes_Cpu, public Classic_Emu {
typedef Nes_Cpu cpu;
public:
// Equalizer profiles for US NES and Japanese Famicom
static equalizer_t const nes_eq;
static equalizer_t const famicom_eq;
// NSF file header
enum { header_size = 0x80 };
struct header_t
{
char tag [5];
byte vers;
byte track_count;
byte first_track;
byte load_addr [2];
byte init_addr [2];
byte play_addr [2];
char game [32];
char author [32];
char copyright [32];
byte ntsc_speed [2];
byte banks [8];
byte pal_speed [2];
byte speed_flags;
byte chip_flags;
byte unused [4];
};
// Header for currently loaded file
header_t const& header() const { return header_; }
static gme_type_t static_type() { return gme_nsf_type; }
public:
// deprecated
using Music_Emu::load;
blargg_err_t load( header_t const& h, Data_Reader& in ) // use Remaining_Reader
{ return load_remaining_( &h, sizeof h, in ); }
public:
Nsf_Emu();
~Nsf_Emu();
Nes_Apu* apu_() { return &apu; }
protected:
blargg_err_t track_info_( track_info_t*, int track ) const;
blargg_err_t load_( Data_Reader& );
blargg_err_t start_track_( int );
blargg_err_t run_clocks( blip_time_t&, int );
void set_tempo_( double );
void set_voice( int, Blip_Buffer*, Blip_Buffer*, Blip_Buffer* );
void update_eq( blip_eq_t const& );
void unload();
protected:
enum { bank_count = 8 };
byte initial_banks [bank_count];
nes_addr_t init_addr;
nes_addr_t play_addr;
double clock_rate_;
bool pal_only;
// timing
Nes_Cpu::registers_t saved_state;
nes_time_t next_play;
nes_time_t play_period;
int play_extra;
int play_ready;
enum { rom_begin = 0x8000 };
enum { bank_select_addr = 0x5FF8 };
enum { bank_size = 0x1000 };
Rom_Data<bank_size> rom;
public: private: friend class Nes_Cpu;
void cpu_jsr( nes_addr_t );
int cpu_read( nes_addr_t );
void cpu_write( nes_addr_t, int );
void cpu_write_misc( nes_addr_t, int );
enum { badop_addr = bank_select_addr };
private:
class Nes_Namco_Apu* namco;
class Nes_Vrc6_Apu* vrc6;
class Nes_Fme7_Apu* fme7;
Nes_Apu apu;
static int pcm_read( void*, nes_addr_t );
blargg_err_t init_sound();
header_t header_;
enum { sram_addr = 0x6000 };
byte sram [0x2000];
byte unmapped_code [Nes_Cpu::page_size + 8];
};
#endif
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