diff options
Diffstat (limited to 'gme/Nsf_Emu.h')
-rw-r--r-- | gme/Nsf_Emu.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/gme/Nsf_Emu.h b/gme/Nsf_Emu.h new file mode 100644 index 00000000..e06b9172 --- /dev/null +++ b/gme/Nsf_Emu.h @@ -0,0 +1,106 @@ +// 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 + 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 |