1 files changed, 86 insertions, 0 deletions
diff --git a/plugins/gme/game-music-emu-0.6pre/gme/Gym_Emu.h b/plugins/gme/game-music-emu-0.6pre/gme/Gym_Emu.h
new file mode 100644
index 00000000..e8df596b
--- /dev/null
+++ b/plugins/gme/game-music-emu-0.6pre/gme/Gym_Emu.h
@@ -0,0 +1,86 @@
+// Sega Genesis/Mega Drive GYM music file emulator
+// Performs PCM timing recovery to improve sample quality.
+
+// Game_Music_Emu 0.6-pre
+#ifndef GYM_EMU_H
+#define GYM_EMU_H
+
+#include "Dual_Resampler.h"
+#include "Ym2612_Emu.h"
+#include "Music_Emu.h"
+#include "Sms_Apu.h"
+
+class Gym_Emu : public Music_Emu {
+public:
+	
+	// GYM file header (optional; many files have NO header at all)
+	struct header_t
+	{
+		enum { size = 428 };
+		
+	    char tag        [  4];
+	    char song       [ 32];
+	    char game       [ 32];
+	    char copyright  [ 32];
+	    char emulator   [ 32];
+	    char dumper     [ 32];
+	    char comment    [256];
+	    byte loop_start [  4]; // in 1/60 seconds, 0 if not looped
+	    byte packed     [  4];
+	};
+	
+	// Header for currently loaded file
+	header_t const& header() const          { return header_; }
+	
+	static gme_type_t static_type()         { return gme_gym_type; }
+	
+	// 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; }
+	
+// Implementation
+public:
+	Gym_Emu();
+	~Gym_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 sample_rate );
+	virtual blargg_err_t start_track_( int );
+	virtual blargg_err_t play_( int count, sample_t [] );
+	virtual void mute_voices_( int );
+	virtual void set_tempo_( double );
+
+private:
+	// Log
+	byte const* pos;        // current position
+	byte const* loop_begin;
+	int log_offset;         // size of header (0 or header_t::size)
+	int loop_remain;        // frames remaining until loop_begin has been located
+	int clocks_per_frame;
+
+	bool disable_oversampling_;
+	
+	// PCM
+	int pcm_amp;
+	int prev_pcm_count;     // for detecting beginning/end of group of samples
+	int pcm_enabled;
+	
+	// large objects
+	Dual_Resampler  resampler;
+	Stereo_Buffer   stereo_buf;
+	Blip_Buffer   * pcm_buf;
+	Ym2612_Emu      fm;
+	Sms_Apu         apu;
+	Blip_Synth_Fast pcm_synth;
+	header_t        header_;
+	
+	byte const* log_begin() const { return file_begin() + log_offset; }
+	void parse_frame();
+	void run_pcm( byte const in [], int count );
+	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