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https://github.com/DrBeef/Raze.git
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96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
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// MSX computer KSS music file emulator
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// Game_Music_Emu https://bitbucket.org/mpyne/game-music-emu/
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#ifndef KSS_EMU_H
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#define KSS_EMU_H
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#include "Classic_Emu.h"
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#include "Kss_Scc_Apu.h"
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#include "Kss_Cpu.h"
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#include "Sms_Apu.h"
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#include "Ay_Apu.h"
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class Kss_Emu : private Kss_Cpu, public Classic_Emu {
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typedef Kss_Cpu cpu;
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public:
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// KSS file header
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enum { header_size = 0x10 };
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struct header_t
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{
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byte tag [4];
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byte load_addr [2];
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byte load_size [2];
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byte init_addr [2];
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byte play_addr [2];
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byte first_bank;
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byte bank_mode;
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byte extra_header;
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byte device_flags;
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};
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enum { ext_header_size = 0x10 };
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struct ext_header_t
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{
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byte data_size [4];
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byte unused [4];
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byte first_track [2];
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byte last_tack [2];
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byte psg_vol;
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byte scc_vol;
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byte msx_music_vol;
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byte msx_audio_vol;
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};
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struct composite_header_t : header_t, ext_header_t { };
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// Header for currently loaded file
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composite_header_t const& header() const { return header_; }
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static gme_type_t static_type() { return gme_kss_type; }
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public:
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Kss_Emu();
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~Kss_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_Data<page_size> rom;
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composite_header_t header_;
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bool scc_accessed;
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bool gain_updated;
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void update_gain();
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unsigned scc_enabled; // 0 or 0xC000
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int bank_count;
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void set_bank( int logical, int physical );
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blargg_long bank_size() const { return (16 * 1024L) >> (header_.bank_mode >> 7 & 1); }
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blip_time_t play_period;
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blip_time_t next_play;
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int ay_latch;
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friend void kss_cpu_out( class Kss_Cpu*, cpu_time_t, unsigned addr, int data );
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friend int kss_cpu_in( class Kss_Cpu*, cpu_time_t, unsigned addr );
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void cpu_write( unsigned addr, int data );
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friend void kss_cpu_write( class Kss_Cpu*, unsigned addr, int data );
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// large items
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enum { mem_size = 0x10000 };
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byte ram [mem_size + cpu_padding];
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Ay_Apu ay;
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Scc_Apu scc;
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Sms_Apu* sn;
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byte unmapped_read [0x100];
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byte unmapped_write [page_size];
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};
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#endif
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