1 files changed, 102 insertions, 0 deletions
diff --git a/plugins/gme/game-music-emu-0.6.0/gme/Nes_Namco_Apu.h b/plugins/gme/game-music-emu-0.6.0/gme/Nes_Namco_Apu.h
new file mode 100644
index 00000000..db5fea4b
--- /dev/null
+++ b/plugins/gme/game-music-emu-0.6.0/gme/Nes_Namco_Apu.h
@@ -0,0 +1,102 @@
+// Namco 106 sound chip emulator
+
+// Nes_Snd_Emu 0.1.8
+#ifndef NES_NAMCO_APU_H
+#define NES_NAMCO_APU_H
+
+#include "blargg_common.h"
+#include "Blip_Buffer.h"
+
+struct namco_state_t;
+
+class Nes_Namco_Apu {
+public:
+	// See Nes_Apu.h for reference.
+	void volume( double );
+	void treble_eq( const blip_eq_t& );
+	void output( Blip_Buffer* );
+	enum { osc_count = 8 };
+	void osc_output( int index, Blip_Buffer* );
+	void reset();
+	void end_frame( blip_time_t );
+	
+	// Read/write data register is at 0x4800
+	enum { data_reg_addr = 0x4800 };
+	void write_data( blip_time_t, int );
+	int read_data();
+	
+	// Write-only address register is at 0xF800
+	enum { addr_reg_addr = 0xF800 };
+	void write_addr( int );
+	
+	// to do: implement save/restore
+	void save_state( namco_state_t* out ) const;
+	void load_state( namco_state_t const& );
+	
+public:
+	Nes_Namco_Apu();
+	BLARGG_DISABLE_NOTHROW
+private:
+	// noncopyable
+	Nes_Namco_Apu( const Nes_Namco_Apu& );
+	Nes_Namco_Apu& operator = ( const Nes_Namco_Apu& );
+	
+	struct Namco_Osc {
+		blargg_long delay;
+		Blip_Buffer* output;
+		short last_amp;
+		short wave_pos;
+	};
+	
+	Namco_Osc oscs [osc_count];
+	
+	blip_time_t last_time;
+	int addr_reg;
+	
+	enum { reg_count = 0x80 };
+	BOOST::uint8_t reg [reg_count];
+	Blip_Synth<blip_good_quality,15> synth;
+	
+	BOOST::uint8_t& access();
+	void run_until( blip_time_t );
+};
+/*
+struct namco_state_t
+{
+	BOOST::uint8_t regs [0x80];
+	BOOST::uint8_t addr;
+	BOOST::uint8_t unused;
+	BOOST::uint8_t positions [8];
+	BOOST::uint32_t delays [8];
+};
+*/
+
+inline BOOST::uint8_t& Nes_Namco_Apu::access()
+{
+	int addr = addr_reg & 0x7F;
+	if ( addr_reg & 0x80 )
+		addr_reg = (addr + 1) | 0x80;
+	return reg [addr];
+}
+
+inline void Nes_Namco_Apu::volume( double v ) { synth.volume( 0.10 / osc_count * v ); }
+
+inline void Nes_Namco_Apu::treble_eq( const blip_eq_t& eq ) { synth.treble_eq( eq ); }
+
+inline void Nes_Namco_Apu::write_addr( int v ) { addr_reg = v; }
+
+inline int Nes_Namco_Apu::read_data() { return access(); }
+
+inline void Nes_Namco_Apu::osc_output( int i, Blip_Buffer* buf )
+{
+	assert( (unsigned) i < osc_count );
+	oscs [i].output = buf;
+}
+
+inline void Nes_Namco_Apu::write_data( blip_time_t time, int data )
+{
+	run_until( time );
+	access() = data;
+}
+
+#endif