1 files changed, 88 insertions, 0 deletions
diff --git a/plugins/gme/Game_Music_Emu-0.5.2/gme/Gbs_Emu.h b/plugins/gme/Game_Music_Emu-0.5.2/gme/Gbs_Emu.h
new file mode 100644
index 00000000..93fe691e
--- /dev/null
+++ b/plugins/gme/Game_Music_Emu-0.5.2/gme/Gbs_Emu.h
@@ -0,0 +1,88 @@
+// Nintendo Game Boy GBS music file emulator
+
+// Game_Music_Emu 0.5.2
+#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