1 files changed, 85 insertions, 0 deletions
diff --git a/plugins/gme/game-music-emu-0.6pre/gme/Spc_Emu.h b/plugins/gme/game-music-emu-0.6pre/gme/Spc_Emu.h
new file mode 100644
index 00000000..00901424
--- /dev/null
+++ b/plugins/gme/game-music-emu-0.6pre/gme/Spc_Emu.h
@@ -0,0 +1,85 @@
+// Super Nintendo SPC music file emulator
+
+// Game_Music_Emu 0.6-pre
+#ifndef SPC_EMU_H
+#define SPC_EMU_H
+
+#include "Music_Emu.h"
+#include "Snes_Spc.h"
+#include "Spc_Filter.h"
+
+#if GME_SPC_FAST_RESAMPLER
+	#include "Upsampler.h"
+	typedef Upsampler Spc_Emu_Resampler;
+#else
+	#include "Fir_Resampler.h"
+	typedef Fir_Resampler<24> Spc_Emu_Resampler;
+#endif
+
+class Spc_Emu : public Music_Emu {
+public:
+	// The Super Nintendo hardware samples at 32kHz. Other sample rates are
+	// handled by resampling the 32kHz output; emulation accuracy is not affected.
+	enum { native_sample_rate = 32000 };
+	
+	// Disables annoying pseudo-surround effect some music uses
+	void disable_surround( bool disable = true )    { apu.disable_surround( disable ); }
+
+	// Enables gaussian, cubic or sinc interpolation
+	void interpolation_level( int level = 0 )   { apu.interpolation_level( level ); }
+
+	// SPC file header
+	struct header_t
+	{
+		enum { size = 0x100 };
+		
+		char tag       [35];
+		byte format;
+		byte version;
+		byte pc        [ 2];
+		byte a, x, y, psw, sp;
+		byte unused    [ 2];
+		char song      [32];
+		char game      [32];
+		char dumper    [16];
+		char comment   [32];
+		byte date      [11];
+		byte len_secs  [ 3];
+		byte fade_msec [ 4];
+		char author    [32]; // sometimes first char should be skipped (see official SPC spec)
+		byte mute_mask;
+		byte emulator;
+		byte unused2   [46];
+	};
+	
+	// Header for currently loaded file
+	header_t const& header() const                  { return *(header_t const*) file_begin(); }
+	
+	static gme_type_t static_type()                 { return gme_spc_type; }
+	
+// Implementation
+public:
+	Spc_Emu();
+	~Spc_Emu();
+
+protected:
+	virtual blargg_err_t load_mem_( byte const [], int );
+	virtual blargg_err_t track_info_( track_info_t*, int track ) const;
+	virtual blargg_err_t set_sample_rate_( int );
+	virtual blargg_err_t start_track_( int );
+	virtual blargg_err_t play_( int, sample_t [] );
+	virtual blargg_err_t skip_( int );
+	virtual void mute_voices_( int );
+	virtual void set_tempo_( double );
+
+private:
+	Spc_Emu_Resampler resampler;
+	SPC_Filter filter;
+	Snes_Spc apu;
+	
+	byte const* trailer_() const;
+	int trailer_size_() const;
+	blargg_err_t play_and_filter( int count, sample_t out [] );
+};
+
+#endif