dynamic_mod.c
author Sam Lantinga <slouken@libsdl.org>
Sat, 03 Oct 2009 20:43:33 +0000
changeset 419 e27fe0bfe470
child 470 5cebd6c5be2d
permissions -rw-r--r--
Sam Lantinga - Sat Oct 3 13:33:36 PDT 2009
* MOD support uses libmikmod and is dynamically loaded by default
     1 /*
     2     SDL_mixer:  An audio mixer library based on the SDL library
     3     Copyright (C) 1997-2009 Sam Lantinga
     4 
     5     This library is free software; you can redistribute it and/or
     6     modify it under the terms of the GNU Library General Public
     7     License as published by the Free Software Foundation; either
     8     version 2 of the License, or (at your option) any later version.
     9 
    10     This library is distributed in the hope that it will be useful,
    11     but WITHOUT ANY WARRANTY; without even the implied warranty of
    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13     Library General Public License for more details.
    14 
    15     You should have received a copy of the GNU Library General Public
    16     License along with this library; if not, write to the Free
    17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    18 
    19     Sam Lantinga
    20     slouken@libsdl.org
    21 */
    22 
    23 #ifdef MOD_MUSIC
    24 
    25 #include "SDL_loadso.h"
    26 
    27 #include "dynamic_mod.h"
    28 
    29 mikmod_loader mikmod = {
    30 	0, NULL
    31 };
    32 
    33 #ifdef MOD_DYNAMIC
    34 int Mix_InitMOD()
    35 {
    36 	if ( mikmod.loaded == 0 ) {
    37 		mikmod.handle = SDL_LoadObject(MOD_DYNAMIC);
    38 		if ( mikmod.handle == NULL ) {
    39 			return -1;
    40 		}
    41 		mikmod.MikMod_Exit =
    42 			(void (*)(void))
    43 			SDL_LoadFunction(mikmod.handle, "MikMod_Exit");
    44 		if ( mikmod.MikMod_Exit == NULL ) {
    45 			SDL_UnloadObject(mikmod.handle);
    46 			return -1;
    47 		}
    48 		mikmod.MikMod_InfoDriver =
    49 			(CHAR* (*)(void))
    50 			SDL_LoadFunction(mikmod.handle, "MikMod_InfoDriver");
    51 		if ( mikmod.MikMod_InfoDriver == NULL ) {
    52 			SDL_UnloadObject(mikmod.handle);
    53 			return -1;
    54 		}
    55 		mikmod.MikMod_InfoLoader =
    56 			(CHAR* (*)(void))
    57 			SDL_LoadFunction(mikmod.handle, "MikMod_InfoLoader");
    58 		if ( mikmod.MikMod_InfoLoader == NULL ) {
    59 			SDL_UnloadObject(mikmod.handle);
    60 			return -1;
    61 		}
    62 		mikmod.MikMod_Init =
    63 			(BOOL (*)(CHAR*))
    64 			SDL_LoadFunction(mikmod.handle, "MikMod_Init");
    65 		if ( mikmod.MikMod_Init == NULL ) {
    66 			SDL_UnloadObject(mikmod.handle);
    67 			return -1;
    68 		}
    69 		mikmod.MikMod_RegisterAllLoaders =
    70 			(void (*)(void))
    71 			SDL_LoadFunction(mikmod.handle, "MikMod_RegisterAllLoaders");
    72 		if ( mikmod.MikMod_RegisterAllLoaders == NULL ) {
    73 			SDL_UnloadObject(mikmod.handle);
    74 			return -1;
    75 		}
    76 		mikmod.MikMod_RegisterDriver =
    77 			(void (*)(struct MDRIVER*))
    78 			SDL_LoadFunction(mikmod.handle, "MikMod_RegisterDriver");
    79 		if ( mikmod.MikMod_RegisterDriver == NULL ) {
    80 			SDL_UnloadObject(mikmod.handle);
    81 			return -1;
    82 		}
    83 		mikmod.MikMod_errno =
    84 			(int*)
    85 			SDL_LoadFunction(mikmod.handle, "MikMod_errno");
    86 		if ( mikmod.MikMod_errno == NULL ) {
    87 			SDL_UnloadObject(mikmod.handle);
    88 			return -1;
    89 		}
    90 		mikmod.MikMod_strerror =
    91 			(char* (*)(int))
    92 			SDL_LoadFunction(mikmod.handle, "MikMod_strerror");
    93 		if ( mikmod.MikMod_strerror == NULL ) {
    94 			SDL_UnloadObject(mikmod.handle);
    95 			return -1;
    96 		}
    97 		mikmod.Player_Active =
    98 			(BOOL (*)(void))
    99 			SDL_LoadFunction(mikmod.handle, "Player_Active");
   100 		if ( mikmod.Player_Active == NULL ) {
   101 			SDL_UnloadObject(mikmod.handle);
   102 			return -1;
   103 		}
   104 		mikmod.Player_Free =
   105 			(void (*)(MODULE*))
   106 			SDL_LoadFunction(mikmod.handle, "Player_Free");
   107 		if ( mikmod.Player_Free == NULL ) {
   108 			SDL_UnloadObject(mikmod.handle);
   109 			return -1;
   110 		}
   111 		mikmod.Player_LoadGeneric =
   112 			(MODULE* (*)(MREADER*,int,BOOL))
   113 			SDL_LoadFunction(mikmod.handle, "Player_LoadGeneric");
   114 		if ( mikmod.Player_LoadGeneric == NULL ) {
   115 			SDL_UnloadObject(mikmod.handle);
   116 			return -1;
   117 		}
   118 		mikmod.Player_SetPosition =
   119 			(void (*)(UWORD))
   120 			SDL_LoadFunction(mikmod.handle, "Player_SetPosition");
   121 		if ( mikmod.Player_SetPosition == NULL ) {
   122 			SDL_UnloadObject(mikmod.handle);
   123 			return -1;
   124 		}
   125 		mikmod.Player_SetVolume =
   126 			(void (*)(SWORD))
   127 			SDL_LoadFunction(mikmod.handle, "Player_SetVolume");
   128 		if ( mikmod.Player_SetVolume == NULL ) {
   129 			SDL_UnloadObject(mikmod.handle);
   130 			return -1;
   131 		}
   132 		mikmod.Player_Start =
   133 			(void (*)(MODULE*))
   134 			SDL_LoadFunction(mikmod.handle, "Player_Start");
   135 		if ( mikmod.Player_Start == NULL ) {
   136 			SDL_UnloadObject(mikmod.handle);
   137 			return -1;
   138 		}
   139 		mikmod.Player_Stop =
   140 			(void (*)(void))
   141 			SDL_LoadFunction(mikmod.handle, "Player_Stop");
   142 		if ( mikmod.Player_Stop == NULL ) {
   143 			SDL_UnloadObject(mikmod.handle);
   144 			return -1;
   145 		}
   146 		mikmod.VC_WriteBytes =
   147 			(ULONG (*)(SBYTE*,ULONG))
   148 			SDL_LoadFunction(mikmod.handle, "VC_WriteBytes");
   149 		if ( mikmod.VC_WriteBytes == NULL ) {
   150 			SDL_UnloadObject(mikmod.handle);
   151 			return -1;
   152 		}
   153 		mikmod.drv_nos =
   154 			(MDRIVER*)
   155 			SDL_LoadFunction(mikmod.handle, "drv_nos");
   156 		if ( mikmod.drv_nos == NULL ) {
   157 			SDL_UnloadObject(mikmod.handle);
   158 			return -1;
   159 		}
   160 		mikmod.md_device =
   161 			(UWORD*)
   162 			SDL_LoadFunction(mikmod.handle, "md_device");
   163 		if ( mikmod.md_device == NULL ) {
   164 			SDL_UnloadObject(mikmod.handle);
   165 			return -1;
   166 		}
   167 		mikmod.md_mixfreq =
   168 			(UWORD*)
   169 			SDL_LoadFunction(mikmod.handle, "md_mixfreq");
   170 		if ( mikmod.md_mixfreq == NULL ) {
   171 			SDL_UnloadObject(mikmod.handle);
   172 			return -1;
   173 		}
   174 		mikmod.md_mode =
   175 			(UWORD*)
   176 			SDL_LoadFunction(mikmod.handle, "md_mode");
   177 		if ( mikmod.md_mode == NULL ) {
   178 			SDL_UnloadObject(mikmod.handle);
   179 			return -1;
   180 		}
   181 		mikmod.md_musicvolume =
   182 			(UBYTE*)
   183 			SDL_LoadFunction(mikmod.handle, "md_musicvolume");
   184 		if ( mikmod.md_musicvolume == NULL ) {
   185 			SDL_UnloadObject(mikmod.handle);
   186 			return -1;
   187 		}
   188 		mikmod.md_pansep =
   189 			(UBYTE*)
   190 			SDL_LoadFunction(mikmod.handle, "md_pansep");
   191 		if ( mikmod.md_pansep == NULL ) {
   192 			SDL_UnloadObject(mikmod.handle);
   193 			return -1;
   194 		}
   195 		mikmod.md_reverb =
   196 			(UBYTE*)
   197 			SDL_LoadFunction(mikmod.handle, "md_reverb");
   198 		if ( mikmod.md_reverb == NULL ) {
   199 			SDL_UnloadObject(mikmod.handle);
   200 			return -1;
   201 		}
   202 		mikmod.md_sndfxvolume =
   203 			(UBYTE*)
   204 			SDL_LoadFunction(mikmod.handle, "md_sndfxvolume");
   205 		if ( mikmod.md_sndfxvolume == NULL ) {
   206 			SDL_UnloadObject(mikmod.handle);
   207 			return -1;
   208 		}
   209 		mikmod.md_volume =
   210 			(UBYTE*)
   211 			SDL_LoadFunction(mikmod.handle, "md_volume");
   212 		if ( mikmod.md_volume == NULL ) {
   213 			SDL_UnloadObject(mikmod.handle);
   214 			return -1;
   215 		}
   216 	}
   217 	++mikmod.loaded;
   218 
   219 	return 0;
   220 }
   221 void Mix_QuitMOD()
   222 {
   223 	if ( mikmod.loaded == 0 ) {
   224 		return;
   225 	}
   226 	if ( mikmod.loaded == 1 ) {
   227 		SDL_UnloadObject(mikmod.handle);
   228 	}
   229 	--mikmod.loaded;
   230 }
   231 #else
   232 int Mix_InitMOD()
   233 {
   234 	if ( mikmod.loaded == 0 ) {
   235 		mikmod.MikMod_Exit = MikMod_Exit;
   236 		mikmod.MikMod_InfoDriver = MikMod_InfoDriver;
   237 		mikmod.MikMod_InfoLoader = MikMod_InfoLoader;
   238 		mikmod.MikMod_Init = MikMod_Init;
   239 		mikmod.MikMod_RegisterAllLoaders = MikMod_RegisterAllLoaders;
   240 		mikmod.MikMod_RegisterDriver = MikMod_RegisterDriver;
   241 		mikmod.MikMod_errno = &MikMod_errno;
   242 		mikmod.MikMod_strerror = MikMod_strerror;
   243 		mikmod.Player_Active = Player_Active;
   244 		mikmod.Player_Free = Player_Free;
   245 		mikmod.Player_LoadGeneric = Player_LoadGeneric;
   246 		mikmod.Player_SetPosition = Player_SetPosition;
   247 		mikmod.Player_SetVolume = Player_SetVolume;
   248 		mikmod.Player_Start = Player_Start;
   249 		mikmod.Player_Stop = Player_Stop;
   250 		mikmod.VC_WriteBytes = VC_WriteBytes;
   251 		mikmod.drv_nos = &drv_nos;
   252 		mikmod.md_device = &md_device;
   253 		mikmod.md_mixfreq = &md_mixfreq;
   254 		mikmod.md_mode = &md_mode;
   255 		mikmod.md_musicvolume = &md_musicvolume;
   256 		mikmod.md_pansep = &md_pansep;
   257 		mikmod.md_reverb = &md_reverb;
   258 		mikmod.md_sndfxvolume = &md_sndfxvolume;
   259 		mikmod.md_volume = &md_volume;
   260 	}
   261 	++mikmod.loaded;
   262 
   263 	return 0;
   264 }
   265 void Mix_QuitMOD()
   266 {
   267 	if ( mikmod.loaded == 0 ) {
   268 		return;
   269 	}
   270 	if ( mikmod.loaded == 1 ) {
   271 	}
   272 	--mikmod.loaded;
   273 }
   274 #endif /* MOD_DYNAMIC */
   275 
   276 #endif /* MOD_MUSIC */