1 files changed, 218 insertions, 0 deletions
diff --git a/plugins/gme/game-music-emu-0.6.0/gme/Music_Emu.h b/plugins/gme/game-music-emu-0.6.0/gme/Music_Emu.h
new file mode 100644
index 00000000..fe679d74
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+++ b/plugins/gme/game-music-emu-0.6.0/gme/Music_Emu.h
@@ -0,0 +1,218 @@
+// Common interface to game music file emulators
+
+// Game_Music_Emu 0.5.5
+#ifndef MUSIC_EMU_H
+#define MUSIC_EMU_H
+
+#include "Gme_File.h"
+class Multi_Buffer;
+
+struct Music_Emu : public Gme_File {
+public:
+// Basic functionality (see Gme_File.h for file loading/track info functions)
+
+	// Set output sample rate. Must be called only once before loading file.
+	blargg_err_t set_sample_rate( long sample_rate );
+	
+	// Start a track, where 0 is the first track. Also clears warning string.
+	blargg_err_t start_track( int );
+	
+	// Generate 'count' samples info 'buf'. Output is in stereo. Any emulation
+	// errors set warning string, and major errors also end track.
+	typedef short sample_t;
+	blargg_err_t play( long count, sample_t* buf );
+	
+// Informational
+	
+	// Sample rate sound is generated at
+	long sample_rate() const;
+	
+	// Index of current track or -1 if one hasn't been started
+	int current_track() const;
+	
+	// Number of voices used by currently loaded file
+	int voice_count() const;
+	
+	// Names of voices
+	const char** voice_names() const;
+	
+// Track status/control
+
+	// Number of milliseconds (1000 msec = 1 second) played since beginning of track
+	long tell() const;
+	
+	// Seek to new time in track. Seeking backwards or far forward can take a while.
+	blargg_err_t seek( long msec );
+	
+	// Skip n samples
+	blargg_err_t skip( long n );
+	
+	// True if a track has reached its end
+	bool track_ended() const;
+	
+	// Set start time and length of track fade out. Once fade ends track_ended() returns
+	// true. Fade time can be changed while track is playing.
+	void set_fade( long start_msec, long length_msec = 8000 );
+	
+	// Disable automatic end-of-track detection and skipping of silence at beginning
+	void ignore_silence( bool disable = true );
+	
+	// Info for current track
+	using Gme_File::track_info;
+	blargg_err_t track_info( track_info_t* out ) const;
+	
+// Sound customization
+	
+	// Adjust song tempo, where 1.0 = normal, 0.5 = half speed, 2.0 = double speed.
+	// Track length as returned by track_info() assumes a tempo of 1.0.
+	void set_tempo( double );
+	
+	// Mute/unmute voice i, where voice 0 is first voice
+	void mute_voice( int index, bool mute = true );
+	
+	// Set muting state of all voices at once using a bit mask, where -1 mutes them all,
+	// 0 unmutes them all, 0x01 mutes just the first voice, etc.
+	void mute_voices( int mask );
+	
+	// Change overall output amplitude, where 1.0 results in minimal clamping.
+	// Must be called before set_sample_rate().
+	void set_gain( double );
+	
+	// Request use of custom multichannel buffer. Only supported by "classic" emulators;
+	// on others this has no effect. Should be called only once *before* set_sample_rate().
+	virtual void set_buffer( Multi_Buffer* ) { }
+	
+	// Enables/disables accurate emulation options, if any are supported. Might change
+	// equalizer settings.
+	void enable_accuracy( bool enable = true );
+	
+// Sound equalization (treble/bass)
+
+	// Frequency equalizer parameters (see gme.txt)
+	// See gme.h for definition of struct gme_equalizer_t.
+	typedef gme_equalizer_t equalizer_t;
+	
+	// Current frequency equalizater parameters
+	equalizer_t const& equalizer() const;
+	
+	// Set frequency equalizer parameters
+	void set_equalizer( equalizer_t const& );
+	
+	// Equalizer settings for TV speaker
+	static equalizer_t const tv_eq;
+	
+public:
+	Music_Emu();
+	~Music_Emu();
+protected:
+	void set_max_initial_silence( int n )       { max_initial_silence = n; }
+	void set_silence_lookahead( int n )         { silence_lookahead = n; }
+	void set_voice_count( int n )               { voice_count_ = n; }
+	void set_voice_names( const char* const* names );
+	void set_track_ended()                      { emu_track_ended_ = true; }
+	double gain() const                         { return gain_; }
+	double tempo() const                        { return tempo_; }
+	void remute_voices();
+	
+	virtual blargg_err_t set_sample_rate_( long sample_rate ) = 0;
+	virtual void set_equalizer_( equalizer_t const& ) { }
+	virtual void enable_accuracy_( bool enable ) { }
+	virtual void mute_voices_( int mask ) = 0;
+	virtual void set_tempo_( double ) = 0;
+	virtual blargg_err_t start_track_( int ) = 0; // tempo is set before this
+	virtual blargg_err_t play_( long count, sample_t* out ) = 0;
+	virtual blargg_err_t skip_( long count );
+protected:
+	virtual void unload();
+	virtual void pre_load();
+	virtual void post_load_();
+private:
+	// general
+	equalizer_t equalizer_;
+	int max_initial_silence;
+	const char** voice_names_;
+	int voice_count_;
+	int mute_mask_;
+	double tempo_;
+	double gain_;
+	
+	long sample_rate_;
+	blargg_long msec_to_samples( blargg_long msec ) const;
+	
+	// track-specific
+	int current_track_;
+	blargg_long out_time;  // number of samples played since start of track
+	blargg_long emu_time;  // number of samples emulator has generated since start of track
+	bool emu_track_ended_; // emulator has reached end of track
+	volatile bool track_ended_;
+	void clear_track_vars();
+	void end_track_if_error( blargg_err_t );
+	
+	// fading
+	blargg_long fade_start;
+	int fade_step;
+	void handle_fade( long count, sample_t* out );
+	
+	// silence detection
+	int silence_lookahead; // speed to run emulator when looking ahead for silence
+	bool ignore_silence_;
+	long silence_time;     // number of samples where most recent silence began
+	long silence_count;    // number of samples of silence to play before using buf
+	long buf_remain;       // number of samples left in silence buffer
+	enum { buf_size = 2048 };
+	blargg_vector<sample_t> buf;
+	void fill_buf();
+	void emu_play( long count, sample_t* out );
+	
+	Multi_Buffer* effects_buffer;
+	friend Music_Emu* gme_new_emu( gme_type_t, int );
+	friend void gme_set_stereo_depth( Music_Emu*, double );
+};
+
+// base class for info-only derivations
+struct Gme_Info_ : Music_Emu
+{
+	virtual blargg_err_t set_sample_rate_( long sample_rate );
+	virtual void set_equalizer_( equalizer_t const& );
+	virtual void enable_accuracy_( bool );
+	virtual void mute_voices_( int mask );
+	virtual void set_tempo_( double );
+	virtual blargg_err_t start_track_( int );
+	virtual blargg_err_t play_( long count, sample_t* out );
+	virtual void pre_load();
+	virtual void post_load_();
+};
+
+inline blargg_err_t Music_Emu::track_info( track_info_t* out ) const
+{
+	return track_info( out, current_track_ );
+}
+
+inline long Music_Emu::sample_rate() const          { return sample_rate_; }
+inline const char** Music_Emu::voice_names() const  { return voice_names_; }
+inline int Music_Emu::voice_count() const           { return voice_count_; }
+inline int Music_Emu::current_track() const         { return current_track_; }
+inline bool Music_Emu::track_ended() const          { return track_ended_; }
+inline const Music_Emu::equalizer_t& Music_Emu::equalizer() const { return equalizer_; }
+
+inline void Music_Emu::enable_accuracy( bool b )    { enable_accuracy_( b ); }
+inline void Music_Emu::set_tempo_( double t )       { tempo_ = t; }
+inline void Music_Emu::remute_voices()              { mute_voices( mute_mask_ ); }
+inline void Music_Emu::ignore_silence( bool b )     { ignore_silence_ = b; }
+inline blargg_err_t Music_Emu::start_track_( int )  { return 0; }
+
+inline void Music_Emu::set_voice_names( const char* const* names )
+{
+	// Intentional removal of const, so users don't have to remember obscure const in middle
+	voice_names_ = const_cast<const char**> (names);
+}
+
+inline void Music_Emu::mute_voices_( int ) { }
+
+inline void Music_Emu::set_gain( double g )
+{
+	assert( !sample_rate() ); // you must set gain before setting sample rate
+	gain_ = g;
+}
+
+#endif