1 files changed, 66 insertions, 0 deletions
diff --git a/plugins/gme/game-music-emu-0.6pre/gme/Vgm_Emu.h b/plugins/gme/game-music-emu-0.6pre/gme/Vgm_Emu.h
new file mode 100644
index 00000000..67163d20
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+++ b/plugins/gme/game-music-emu-0.6pre/gme/Vgm_Emu.h
@@ -0,0 +1,66 @@
+// Sega VGM music file emulator
+
+// Game_Music_Emu 0.6-pre
+#ifndef VGM_EMU_H
+#define VGM_EMU_H
+
+#include "Classic_Emu.h"
+#include "Dual_Resampler.h"
+#include "Vgm_Core.h"
+
+/* Emulates VGM music using SN76489/SN76496 PSG, and YM2612 and YM2413 FM sound chips.
+Supports custom sound buffer and frequency equalization when VGM uses just the PSG. FM
+sound chips can be run at their proper rates, or slightly higher to reduce aliasing on
+high notes. A YM2413 is supported but not provided separately from the library. */
+class Vgm_Emu : public Classic_Emu {
+public:
+
+	// True if custom buffer and custom equalization are supported
+	// TODO: move into Music_Emu and rename to something like supports_custom_buffer()
+	bool is_classic_emu() const                         { return !core.uses_fm(); }
+	
+	// Disables running FM chips at higher than normal rate. Will result in slightly
+	// more aliasing of high notes.
+	void disable_oversampling( bool disable = true )    { disable_oversampling_ = disable; }
+	
+	// VGM file header (see Vgm_Core.h)
+	typedef Vgm_Core::header_t header_t;
+	
+	// Header for currently loaded file
+	header_t const& header() const                      { return core.header(); }
+
+	// Gd3 tag for currently loaded file
+	blargg_err_t gd3_data( const unsigned char ** data, int * size );
+	
+	static gme_type_t static_type()                     { return gme_vgm_type; }
+
+// Implementation
+public:
+	Vgm_Emu();
+	~Vgm_Emu();
+	
+protected:
+	blargg_err_t track_info_( track_info_t*, int track ) const;
+	blargg_err_t load_mem_( byte const [], int );
+	blargg_err_t set_sample_rate_( int sample_rate );
+	blargg_err_t start_track_( int );
+	blargg_err_t play_( int count, sample_t  []);
+	blargg_err_t run_clocks( blip_time_t&, int );
+	virtual void set_tempo_( double );
+	virtual void mute_voices_( int mask );
+	virtual void set_voice( int, Blip_Buffer*, Blip_Buffer*, Blip_Buffer* );
+	virtual void update_eq( blip_eq_t const& );
+	virtual void unload();
+	
+private:
+	bool disable_oversampling_;
+	Dual_Resampler resampler;
+	Vgm_Core core;
+	
+	void check_end();
+	void check_warning();
+	int play_frame( blip_time_t blip_time, int sample_count, sample_t buf [] );
+	static int play_frame_( void*, blip_time_t, int, sample_t [] );
+};
+
+#endif