diff options
Diffstat (limited to 'plugins/gme/Game_Music_Emu-0.5.2/gme/gme.h')
| -rw-r--r-- | plugins/gme/Game_Music_Emu-0.5.2/gme/gme.h | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/plugins/gme/Game_Music_Emu-0.5.2/gme/gme.h b/plugins/gme/Game_Music_Emu-0.5.2/gme/gme.h new file mode 100644 index 00000000..469c901c --- /dev/null +++ b/plugins/gme/Game_Music_Emu-0.5.2/gme/gme.h @@ -0,0 +1,222 @@ +/* Game music emulator library C interface (also usable from C++) */ + +/* Game_Music_Emu 0.5.2 */ +#ifndef GME_H +#define GME_H + +#ifdef __cplusplus + extern "C" { +#endif + +/* Error string returned by library functions, or NULL if no error (success) */ +typedef const char* gme_err_t; + +/* First parameter of most gme_ functions is a pointer to the Music_Emu */ +typedef struct Music_Emu Music_Emu; + + +/******** Basic operations ********/ + +/* Create emulator and load game music file/data into it. Sets *out to new emulator. */ +gme_err_t gme_open_file( const char* path, Music_Emu** out, long sample_rate ); + +/* Number of tracks available */ +int gme_track_count( Music_Emu const* ); + +/* Start a track, where 0 is the first track */ +gme_err_t gme_start_track( Music_Emu*, int index ); + +/* Generate 'count' 16-bit signed samples info 'out'. Output is in stereo. */ +gme_err_t gme_play( Music_Emu*, long count, short* out ); + +/* Finish using emulator and free memory */ +void gme_delete( Music_Emu* ); + + +/******** Track position/length ********/ + +/* Set time to start fading track out. Once fade ends track_ended() returns true. +Fade time can be changed while track is playing. */ +void gme_set_fade( Music_Emu*, long start_msec ); + +/* True if a track has reached its end */ +int gme_track_ended( Music_Emu const* ); + +/* Number of milliseconds (1000 = one second) played since beginning of track */ +long gme_tell( Music_Emu const* ); + +/* Seek to new time in track. Seeking backwards or far forward can take a while. */ +gme_err_t gme_seek( Music_Emu*, long msec ); + + +/******** Informational ********/ + +/* If you only need track information from a music file, pass gme_info_only for +sample_rate to open/load. */ +enum { gme_info_only = -1 }; + +/* Most recent warning string, or NULL if none. Clears current warning after returning. +Warning is also cleared when loading a file and starting a track. */ +const char* gme_warning( Music_Emu* ); + +/* Load m3u playlist file (must be done after loading music) */ +gme_err_t gme_load_m3u( Music_Emu*, const char* path ); + +/* Clear any loaded m3u playlist and any internal playlist that the music format +supports (NSFE for example). */ +void gme_clear_playlist( Music_Emu* ); + +/* Get information for a particular track (length, name, author, etc.) */ +typedef struct track_info_t track_info_t; +gme_err_t gme_track_info( Music_Emu const*, track_info_t* out, int track ); + +struct track_info_t +{ + long track_count; + + /* times in milliseconds; -1 if unknown */ + long length; + long intro_length; + long loop_length; + + /* empty string if not available */ + char system [256]; + char game [256]; + char song [256]; + char author [256]; + char copyright [256]; + char comment [256]; + char dumper [256]; +}; +enum { gme_max_field = 255 }; + + +/******** Advanced playback ********/ + +/* Adjust stereo echo depth, where 0.0 = off and 1.0 = maximum. Has no effect for +GYM, SPC, and Sega Genesis VGM music */ +void gme_set_stereo_depth( Music_Emu*, double depth ); + +/* Disable automatic end-of-track detection and skipping of silence at beginning +if ignore is true */ +void gme_ignore_silence( Music_Emu*, int ignore ); + +/* 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 gme_set_tempo( Music_Emu*, double tempo ); + +/* Number of voices used by currently loaded file */ +int gme_voice_count( Music_Emu const* ); + +/* Names of voices */ +const char** gme_voice_names( Music_Emu const* ); + +/* Mute/unmute voice i, where voice 0 is first voice */ +void gme_mute_voice( Music_Emu*, int index, int mute ); + +/* Set muting state of all voices at once using a bit mask, where -1 mutes all +voices, 0 unmutes them all, 0x01 mutes just the first voice, etc. */ +void gme_mute_voices( Music_Emu*, int muting_mask ); + +/* Frequency equalizer parameters (see gme.txt) */ +typedef struct gme_equalizer_t +{ + double treble; /* -50.0 = muffled, 0 = flat, +5.0 = extra-crisp */ + long bass; /* 1 = full bass, 90 = average, 16000 = almost no bass */ +} gme_equalizer_t; + +/* Get current frequency equalizater parameters */ +gme_equalizer_t gme_equalizer( Music_Emu const* ); + +/* Change frequency equalizer parameters */ +void gme_set_equalizer( Music_Emu*, gme_equalizer_t const* eq ); + + + +/******** Game music types ********/ + +/* gme_type_t is a pointer to this structure. For example, gme_nsf_type->system is +"Nintendo NES" and gme_nsf_type->new_emu() is equilvant to new Nsf_Emu (in C++). */ +typedef struct gme_type_t_ const* gme_type_t; +struct gme_type_t_ +{ + const char* system; /* name of system this music file type is generally for */ + int track_count; /* non-zero for formats with a fixed number of tracks */ + Music_Emu* (*new_emu)(); /* Create new emulator for this type (useful in C++ only) */ + Music_Emu* (*new_info)(); /* Create new info reader for this type */ + + /* internal */ + const char* extension_; + int flags_; +}; + +/* Emulator type constants for each supported file type */ +extern struct gme_type_t_ const gme_ay_type [], gme_gbs_type [], gme_gym_type [], + gme_hes_type [], gme_kss_type [], gme_nsf_type [], gme_nsfe_type [], + gme_sap_type [], gme_spc_type [], gme_vgm_type [], gme_vgz_type []; + +/* Type of this emulator */ +gme_type_t gme_type( Music_Emu const* ); + +/* Pointer to array of all music types, with NULL entry at end. Allows a player linked +to this library to support new music types without having to be updated. */ +gme_type_t const* gme_type_list(); + + +/******** Advanced file loading ********/ + +/* Error returned if file type is not supported */ +extern const char gme_wrong_file_type []; + +/* Same as gme_open_file(), but uses file data already in memory. Makes copy of data. */ +gme_err_t gme_open_data( void const* data, long size, Music_Emu** out, long sample_rate ); + +/* Determine likely game music type based on first four bytes of file. Returns +string containing proper file suffix (i.e. "NSF", "SPC", etc.) or "" if +file header is not recognized. */ +const char* gme_identify_header( void const* header ); + +/* Get corresponding music type for file path or extension passed in. */ +gme_type_t gme_identify_extension( const char* path_or_extension ); + +/* Determine file type based on file's extension or header (if extension isn't recognized). +Sets *type_out to type, or 0 if unrecognized or error. */ +gme_err_t gme_identify_file( const char* path, gme_type_t* type_out ); + +/* Create new emulator and set sample rate. Returns NULL if out of memory. If you only need +track information, pass gme_info_only for sample_rate. */ +Music_Emu* gme_new_emu( gme_type_t, long sample_rate ); + +/* Load music file into emulator */ +gme_err_t gme_load_file( Music_Emu*, const char* path ); + +/* Load music file from memory into emulator. Makes a copy of data passed. */ +gme_err_t gme_load_data( Music_Emu*, void const* data, long size ); + +/* Load music file using custom data reader function that will be called to +read file data. Most emulators load the entire file in one read call. */ +typedef gme_err_t (*gme_reader_t)( void* your_data, void* out, long count ); +gme_err_t gme_load_custom( Music_Emu*, gme_reader_t, long file_size, void* your_data ); + +/* Load m3u playlist file from memory (must be done after loading music) */ +gme_err_t gme_load_m3u_data( Music_Emu*, void const* data, long size ); + + +/******** User data ********/ + +/* Set/get pointer to data you want to associate with this emulator. +You can use this for whatever you want. */ +void gme_set_user_data( Music_Emu*, void* new_user_data ); +void* gme_user_data( Music_Emu const* ); + +/* Register cleanup function to be called when deleting emulator, or NULL to +clear it. Passes user_data to cleanup function. */ +typedef void (*gme_user_cleanup_t)( void* user_data ); +void gme_set_user_cleanup( Music_Emu*, gme_user_cleanup_t func ); + + +#ifdef __cplusplus + } +#endif + +#endif |