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718112a8fe
Currently none of these is being used, but eventually they will, once more code gets ported over. So it's better to have them right away and avoid editing the project file too much, only to revert that later.
88 lines
2 KiB
C++
88 lines
2 KiB
C++
// Nintendo Game Boy GBS music file emulator
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// Game_Music_Emu https://bitbucket.org/mpyne/game-music-emu/
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#ifndef GBS_EMU_H
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#define GBS_EMU_H
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#include "Classic_Emu.h"
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#include "Gb_Apu.h"
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#include "Gb_Cpu.h"
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class Gbs_Emu : private Gb_Cpu, public Classic_Emu {
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typedef Gb_Cpu cpu;
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public:
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// Equalizer profiles for Game Boy Color speaker and headphones
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static equalizer_t const handheld_eq;
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static equalizer_t const headphones_eq;
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// GBS file header
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enum { header_size = 112 };
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struct header_t
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{
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char tag [3];
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byte vers;
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byte track_count;
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byte first_track;
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byte load_addr [2];
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byte init_addr [2];
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byte play_addr [2];
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byte stack_ptr [2];
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byte timer_modulo;
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byte timer_mode;
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char game [32];
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char author [32];
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char copyright [32];
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};
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// Header for currently loaded file
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header_t const& header() const { return header_; }
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static gme_type_t static_type() { return gme_gbs_type; }
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public:
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// deprecated
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using Music_Emu::load;
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blargg_err_t load( header_t const& h, Data_Reader& in ) // use Remaining_Reader
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{ return load_remaining_( &h, sizeof h, in ); }
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public:
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Gbs_Emu();
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~Gbs_Emu();
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protected:
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blargg_err_t track_info_( track_info_t*, int track ) const;
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blargg_err_t load_( Data_Reader& );
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blargg_err_t start_track_( int );
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blargg_err_t run_clocks( blip_time_t&, int );
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void set_tempo_( double );
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void set_voice( int, Blip_Buffer*, Blip_Buffer*, Blip_Buffer* );
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void update_eq( blip_eq_t const& );
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void unload();
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private:
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// rom
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enum { bank_size = 0x4000 };
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Rom_Data<bank_size> rom;
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void set_bank( int );
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// timer
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blip_time_t cpu_time;
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blip_time_t play_period;
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blip_time_t next_play;
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void update_timer();
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header_t header_;
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void cpu_jsr( gb_addr_t );
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public: private: friend class Gb_Cpu;
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blip_time_t clock() const { return cpu_time - cpu::remain(); }
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enum { joypad_addr = 0xFF00 };
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enum { ram_addr = 0xA000 };
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enum { hi_page = 0xFF00 - ram_addr };
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byte ram [0x4000 + 0x2000 + Gb_Cpu::cpu_padding];
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Gb_Apu apu;
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int cpu_read( gb_addr_t );
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void cpu_write( gb_addr_t, int );
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};
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#endif
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