294 lines
11 KiB
C
294 lines
11 KiB
C
/* Game music emulator library C interface (also usable from C++) */
|
|
|
|
/* Game_Music_Emu 0.7.0 */
|
|
#ifndef GME_H
|
|
#define GME_H
|
|
|
|
#include "blargg_source.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#define GME_VERSION 0x000700 /* 1 byte major, 1 byte minor, 1 byte patch-level */
|
|
|
|
/* 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. */
|
|
BLARGG_EXPORT gme_err_t gme_open_file( const char path [], Music_Emu** out, int sample_rate );
|
|
|
|
/* Number of tracks available */
|
|
BLARGG_EXPORT int gme_track_count( Music_Emu const* );
|
|
|
|
/* Start a track, where 0 is the first track */
|
|
BLARGG_EXPORT gme_err_t gme_start_track( Music_Emu*, int index );
|
|
|
|
/* Generate 'count' 16-bit signed samples info 'out'. Output is in stereo. */
|
|
BLARGG_EXPORT gme_err_t gme_play( Music_Emu*, int count, short out [] );
|
|
|
|
/* Finish using emulator and free memory */
|
|
BLARGG_EXPORT 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. */
|
|
BLARGG_EXPORT void gme_set_fade( Music_Emu*, int start_msec, int length_msec );
|
|
|
|
/**
|
|
* If do_autoload_limit is nonzero, then automatically load track length
|
|
* metadata (if present) and terminate playback once the track length has been
|
|
* reached. Otherwise playback will continue for an arbitrary period of time
|
|
* until a prolonged period of silence is detected.
|
|
*
|
|
* Not all individual emulators support this setting.
|
|
*
|
|
* By default, playback limits are loaded and applied.
|
|
*
|
|
* @since 0.6.2
|
|
*/
|
|
BLARGG_EXPORT void gme_set_autoload_playback_limit( Music_Emu *, int do_autoload_limit );
|
|
|
|
/** See gme_set_autoload_playback_limit.
|
|
* @since 0.6.2
|
|
*/
|
|
BLARGG_EXPORT int gme_autoload_playback_limit( Music_Emu const* );
|
|
|
|
/* True if a track has reached its end */
|
|
BLARGG_EXPORT int gme_track_ended( Music_Emu const* );
|
|
|
|
/* Number of milliseconds (1000 = one second) played since beginning of track */
|
|
BLARGG_EXPORT int gme_tell( Music_Emu const* );
|
|
|
|
/* Number of samples generated since beginning of track */
|
|
BLARGG_EXPORT int gme_tell_samples( Music_Emu const* );
|
|
|
|
/* Seek to new time in track. Seeking backwards or far forward can take a while. */
|
|
BLARGG_EXPORT gme_err_t gme_seek( Music_Emu*, int msec );
|
|
|
|
/* Equivalent to restarting track then skipping n samples */
|
|
BLARGG_EXPORT gme_err_t gme_seek_samples( Music_Emu*, int n );
|
|
|
|
|
|
/******** 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. */
|
|
BLARGG_EXPORT const char* gme_warning( Music_Emu* );
|
|
|
|
/* Load m3u playlist file (must be done after loading music) */
|
|
BLARGG_EXPORT 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). */
|
|
BLARGG_EXPORT void gme_clear_playlist( Music_Emu* );
|
|
|
|
/* Gets information for a particular track (length, name, author, etc.).
|
|
Must be freed after use. */
|
|
typedef struct gme_info_t gme_info_t;
|
|
BLARGG_EXPORT gme_err_t gme_track_info( Music_Emu const*, gme_info_t** out, int track );
|
|
|
|
/* Frees track information */
|
|
BLARGG_EXPORT void gme_free_info( gme_info_t* );
|
|
|
|
struct BLARGG_EXPORT gme_info_t
|
|
{
|
|
/* times in milliseconds; -1 if unknown */
|
|
int length; /* total length, if file specifies it */
|
|
int intro_length; /* length of song up to looping section */
|
|
int loop_length; /* length of looping section */
|
|
|
|
/* Length if available, otherwise intro_length+loop_length*2 if available,
|
|
otherwise a default of 150000 (2.5 minutes). */
|
|
int play_length;
|
|
|
|
/* fade length in milliseconds; -1 if unknown */
|
|
int fade_length;
|
|
|
|
int i5,i6,i7,i8,i9,i10,i11,i12,i13,i14,i15; /* reserved */
|
|
|
|
/* empty string ("") if not available */
|
|
const char* system;
|
|
const char* game;
|
|
const char* song;
|
|
const char* author;
|
|
const char* copyright;
|
|
const char* comment;
|
|
const char* dumper;
|
|
|
|
const char *s7,*s8,*s9,*s10,*s11,*s12,*s13,*s14,*s15; /* reserved */
|
|
};
|
|
|
|
|
|
/******** 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 */
|
|
BLARGG_EXPORT 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 */
|
|
BLARGG_EXPORT 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. */
|
|
BLARGG_EXPORT void gme_set_tempo( Music_Emu*, double tempo );
|
|
|
|
/* Number of voices used by currently loaded file */
|
|
BLARGG_EXPORT int gme_voice_count( Music_Emu const* );
|
|
|
|
/* Name of voice i, from 0 to gme_voice_count() - 1 */
|
|
BLARGG_EXPORT const char* gme_voice_name( Music_Emu const*, int i );
|
|
|
|
/* Mute/unmute voice i, where voice 0 is first voice */
|
|
BLARGG_EXPORT 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. */
|
|
BLARGG_EXPORT void gme_mute_voices( Music_Emu*, int muting_mask );
|
|
|
|
/* Frequency equalizer parameters (see gme.txt) */
|
|
/* Implementers: If modified, also adjust Music_Emu::make_equalizer as needed */
|
|
typedef struct BLARGG_EXPORT gme_equalizer_t
|
|
{
|
|
double treble; /* -50.0 = muffled, 0 = flat, +5.0 = extra-crisp */
|
|
double bass; /* 1 = full bass, 90 = average, 16000 = almost no bass */
|
|
|
|
double d2,d3,d4,d5,d6,d7,d8,d9; /* reserved */
|
|
} gme_equalizer_t;
|
|
|
|
/* Get current frequency equalizater parameters */
|
|
BLARGG_EXPORT void gme_equalizer( Music_Emu const*, gme_equalizer_t* out );
|
|
|
|
/* Change frequency equalizer parameters */
|
|
BLARGG_EXPORT void gme_set_equalizer( Music_Emu*, gme_equalizer_t const* eq );
|
|
|
|
/* Enables/disables most accurate sound emulation options */
|
|
BLARGG_EXPORT void gme_enable_accuracy( Music_Emu*, int enabled );
|
|
|
|
|
|
/******** Game music types ********/
|
|
|
|
/* Music file type identifier. Can also hold NULL. */
|
|
typedef const struct gme_type_t_* gme_type_t;
|
|
|
|
/* Emulator type constants for each supported file type */
|
|
extern BLARGG_EXPORT const gme_type_t
|
|
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_rsn_type,
|
|
gme_sfm_type,
|
|
gme_vgm_type,
|
|
gme_vgz_type;
|
|
|
|
/* Type of this emulator */
|
|
BLARGG_EXPORT 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. */
|
|
BLARGG_EXPORT gme_type_t const* gme_type_list();
|
|
|
|
/* Name of game system for this music file type */
|
|
BLARGG_EXPORT const char* gme_type_system( gme_type_t );
|
|
|
|
/* True if this music file type supports multiple tracks */
|
|
BLARGG_EXPORT int gme_type_multitrack( gme_type_t );
|
|
|
|
/* whether the pcm output retrieved by gme_play() will have all 8 voices rendered to their
|
|
* individual stereo channel or (if false) these voices get mixed into one single stereo channel
|
|
* @since 0.6.2 */
|
|
BLARGG_EXPORT int gme_multi_channel( Music_Emu const* );
|
|
|
|
/******** Advanced file loading ********/
|
|
|
|
/* Error returned if file type is not supported */
|
|
extern BLARGG_EXPORT const char* const gme_wrong_file_type;
|
|
|
|
/* Same as gme_open_file(), but uses file data already in memory. Makes copy of data.
|
|
* The resulting Music_Emu object will be set to single channel mode. */
|
|
BLARGG_EXPORT gme_err_t gme_open_data( void const* data, long size, Music_Emu** out, int 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. */
|
|
BLARGG_EXPORT const char* gme_identify_header( void const* header );
|
|
|
|
/* Get corresponding music type for file path or extension passed in. */
|
|
BLARGG_EXPORT gme_type_t gme_identify_extension( const char path_or_extension [] );
|
|
|
|
/**
|
|
* Get typical file extension for a given music type. This is not a replacement
|
|
* for a file content identification library (but see gme_identify_header).
|
|
*
|
|
* @since 0.6.2
|
|
*/
|
|
BLARGG_EXPORT const char* gme_type_extension( gme_type_t music_type );
|
|
|
|
/* 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. */
|
|
BLARGG_EXPORT 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. */
|
|
BLARGG_EXPORT Music_Emu* gme_new_emu( gme_type_t, int sample_rate );
|
|
|
|
/* Create new multichannel emulator and set sample rate. Returns NULL if out of memory.
|
|
* If you only need track information, pass gme_info_only for sample_rate.
|
|
* (see gme_multi_channel for more information on multichannel support)
|
|
* @since 0.6.2
|
|
*/
|
|
BLARGG_EXPORT Music_Emu* gme_new_emu_multi_channel( gme_type_t, int sample_rate );
|
|
|
|
/* Load music file into emulator */
|
|
BLARGG_EXPORT gme_err_t gme_load_file( Music_Emu*, const char path [] );
|
|
|
|
/* Load music file from memory into emulator. Makes a copy of data passed. */
|
|
BLARGG_EXPORT 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, int count );
|
|
BLARGG_EXPORT 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) */
|
|
BLARGG_EXPORT 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. */
|
|
BLARGG_EXPORT void gme_set_user_data( Music_Emu*, void* new_user_data );
|
|
BLARGG_EXPORT 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 );
|
|
BLARGG_EXPORT void gme_set_user_cleanup( Music_Emu*, gme_user_cleanup_t func );
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|