diff options
Diffstat (limited to 'plugins/gme/game-music-emu-0.6.0/gme/Gbs_Emu.h')
-rw-r--r-- | plugins/gme/game-music-emu-0.6.0/gme/Gbs_Emu.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/plugins/gme/game-music-emu-0.6.0/gme/Gbs_Emu.h b/plugins/gme/game-music-emu-0.6.0/gme/Gbs_Emu.h new file mode 100644 index 00000000..f3318dc8 --- /dev/null +++ b/plugins/gme/game-music-emu-0.6.0/gme/Gbs_Emu.h @@ -0,0 +1,88 @@ +// Nintendo Game Boy GBS music file emulator + +// Game_Music_Emu 0.5.5 +#ifndef GBS_EMU_H +#define GBS_EMU_H + +#include "Classic_Emu.h" +#include "Gb_Apu.h" +#include "Gb_Cpu.h" + +class Gbs_Emu : private Gb_Cpu, public Classic_Emu { + typedef Gb_Cpu cpu; +public: + // Equalizer profiles for Game Boy Color speaker and headphones + static equalizer_t const handheld_eq; + static equalizer_t const headphones_eq; + + // GBS file header + enum { header_size = 112 }; + struct header_t + { + char tag [3]; + byte vers; + byte track_count; + byte first_track; + byte load_addr [2]; + byte init_addr [2]; + byte play_addr [2]; + byte stack_ptr [2]; + byte timer_modulo; + byte timer_mode; + char game [32]; + char author [32]; + char copyright [32]; + }; + + // Header for currently loaded file + header_t const& header() const { return header_; } + + static gme_type_t static_type() { return gme_gbs_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: + Gbs_Emu(); + ~Gbs_Emu(); +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(); +private: + // rom + enum { bank_size = 0x4000 }; + Rom_Data<bank_size> rom; + void set_bank( int ); + + // timer + blip_time_t cpu_time; + blip_time_t play_period; + blip_time_t next_play; + void update_timer(); + + header_t header_; + void cpu_jsr( gb_addr_t ); + +public: private: friend class Gb_Cpu; + blip_time_t clock() const { return cpu_time - cpu::remain(); } + + enum { joypad_addr = 0xFF00 }; + enum { ram_addr = 0xA000 }; + enum { hi_page = 0xFF00 - ram_addr }; + byte ram [0x4000 + 0x2000 + Gb_Cpu::cpu_padding]; + Gb_Apu apu; + + int cpu_read( gb_addr_t ); + void cpu_write( gb_addr_t, int ); +}; + +#endif |