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https://github.com/DrBeef/Raze.git
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95 lines
1.9 KiB
C
95 lines
1.9 KiB
C
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// TurboGrafx-16/PC Engine HES music file emulator
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// Game_Music_Emu https://bitbucket.org/mpyne/game-music-emu/
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#ifndef HES_EMU_H
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#define HES_EMU_H
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#include "Classic_Emu.h"
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#include "Hes_Apu.h"
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#include "Hes_Cpu.h"
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class Hes_Emu : private Hes_Cpu, public Classic_Emu {
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typedef Hes_Cpu cpu;
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public:
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// HES file header
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enum { header_size = 0x20 };
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struct header_t
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{
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byte tag [4];
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byte vers;
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byte first_track;
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byte init_addr [2];
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byte banks [8];
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byte data_tag [4];
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byte size [4];
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byte addr [4];
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byte unused [4];
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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_hes_type; }
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public:
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Hes_Emu();
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~Hes_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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public: private: friend class Hes_Cpu;
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byte* write_pages [page_count + 1]; // 0 if unmapped or I/O space
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int cpu_read_( hes_addr_t );
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int cpu_read( hes_addr_t );
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void cpu_write_( hes_addr_t, int data );
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void cpu_write( hes_addr_t, int );
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void cpu_write_vdp( int addr, int data );
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byte const* cpu_set_mmr( int page, int bank );
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int cpu_done();
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private:
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Rom_Data<page_size> rom;
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header_t header_;
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hes_time_t play_period;
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hes_time_t last_frame_hook;
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int timer_base;
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struct {
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hes_time_t last_time;
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blargg_long count;
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blargg_long load;
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int raw_load;
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byte enabled;
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byte fired;
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} timer;
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struct {
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hes_time_t next_vbl;
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byte latch;
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byte control;
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} vdp;
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struct {
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hes_time_t timer;
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hes_time_t vdp;
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byte disables;
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} irq;
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void recalc_timer_load();
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// large items
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Hes_Apu apu;
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byte sgx [3 * page_size + cpu_padding];
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void irq_changed();
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void run_until( hes_time_t );
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};
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#endif
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