Mercurial > sdl-ios-xcode
annotate src/SDL.c @ 1260:80f8c94b5199
Date: 10 Jun 2003 15:30:59 -0400
From: Mike Shal
Subject: [SDL] Bug in SDL_wave.c?
Hey everyone, I'm not sure if this is a bug in SDL, or if I just have
incorrect WAV files. The problem I'm having is loading multiple
concatenated WAVs from SDL_LoadWAV_RW. Some WAV files put comments at
the end of the file (which may be bad form), and SDL doesn't skip past
them when reading from the RWops. So the next WAV I try to load will
start at the comment section of the previous WAV, which obviously
doesn't work. If anyone else is having this problem, one quick fix you
can do is run sox on the bad WAVs, which strips out all of the comment
sections.
Eg:
$ sox sound.wav tmp.wav
$ mv -f tmp.wav sound.wav
The other fix is to patch SDL_wave.c, which is included with this email.
(Assuming I made the patch correctly :). All it does is calculate how
much remaining space there is in the WAV file after the data chunk, and
does SDL_RWseek to skip it. I don't think it should interfere with
anything else, but if someone could check it that would be nice :). If
the bug is really with SDL and not with my WAVs, can someone work this
into the next version of SDL? Thanks,
-Mike Shal
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 24 Jan 2006 07:20:18 +0000 |
| parents | 173c063d4f55 |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 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 | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* Initialization code for SDL */ | |
| 29 | |
| 30 #include <stdlib.h> /* For getenv() */ | |
|
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31 #ifdef ENABLE_PTH |
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32 #include <pth.h> |
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33 #endif |
| 0 | 34 |
| 35 #include "SDL.h" | |
| 36 #include "SDL_endian.h" | |
| 37 #include "SDL_fatal.h" | |
| 38 #ifndef DISABLE_VIDEO | |
| 39 #include "SDL_leaks.h" | |
| 40 #endif | |
| 41 | |
| 42 /* Initialization/Cleanup routines */ | |
| 43 #ifndef DISABLE_JOYSTICK | |
| 44 extern int SDL_JoystickInit(void); | |
| 45 extern void SDL_JoystickQuit(void); | |
| 46 #endif | |
| 47 #ifndef DISABLE_CDROM | |
| 48 extern int SDL_CDROMInit(void); | |
| 49 extern void SDL_CDROMQuit(void); | |
| 50 #endif | |
| 51 #ifndef DISABLE_TIMERS | |
| 52 extern void SDL_StartTicks(void); | |
| 53 extern int SDL_TimerInit(void); | |
| 54 extern void SDL_TimerQuit(void); | |
| 55 #endif | |
| 56 | |
| 57 /* The current SDL version */ | |
| 58 static SDL_version version = | |
| 59 { SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL }; | |
| 60 | |
| 61 /* The initialized subsystems */ | |
| 62 static Uint32 SDL_initialized = 0; | |
| 63 static Uint32 ticks_started = 0; | |
| 64 | |
| 65 #ifdef CHECK_LEAKS | |
| 66 int surfaces_allocated = 0; | |
| 67 #endif | |
| 68 | |
| 69 int SDL_InitSubSystem(Uint32 flags) | |
| 70 { | |
| 71 #ifndef DISABLE_VIDEO | |
| 72 /* Initialize the video/event subsystem */ | |
| 73 if ( (flags & SDL_INIT_VIDEO) && !(SDL_initialized & SDL_INIT_VIDEO) ) { | |
| 74 if ( SDL_VideoInit(getenv("SDL_VIDEODRIVER"), | |
| 75 (flags&SDL_INIT_EVENTTHREAD)) < 0 ) { | |
| 76 return(-1); | |
| 77 } | |
| 78 SDL_initialized |= SDL_INIT_VIDEO; | |
| 79 } | |
| 80 #else | |
| 81 if ( flags & SDL_INIT_VIDEO ) { | |
| 82 SDL_SetError("SDL not built with video support"); | |
| 83 return(-1); | |
| 84 } | |
| 85 #endif | |
| 86 | |
| 87 #ifndef DISABLE_AUDIO | |
| 88 /* Initialize the audio subsystem */ | |
| 89 if ( (flags & SDL_INIT_AUDIO) && !(SDL_initialized & SDL_INIT_AUDIO) ) { | |
| 90 if ( SDL_AudioInit(getenv("SDL_AUDIODRIVER")) < 0 ) { | |
| 91 return(-1); | |
| 92 } | |
| 93 SDL_initialized |= SDL_INIT_AUDIO; | |
| 94 } | |
| 95 #else | |
| 96 if ( flags & SDL_INIT_AUDIO ) { | |
| 97 SDL_SetError("SDL not built with audio support"); | |
| 98 return(-1); | |
| 99 } | |
| 100 #endif | |
| 101 | |
| 102 #ifndef DISABLE_TIMERS | |
| 103 /* Initialize the timer subsystem */ | |
| 104 if ( ! ticks_started ) { | |
| 105 SDL_StartTicks(); | |
| 106 ticks_started = 1; | |
| 107 } | |
| 108 if ( (flags & SDL_INIT_TIMER) && !(SDL_initialized & SDL_INIT_TIMER) ) { | |
| 109 if ( SDL_TimerInit() < 0 ) { | |
| 110 return(-1); | |
| 111 } | |
| 112 SDL_initialized |= SDL_INIT_TIMER; | |
| 113 } | |
| 114 #else | |
| 115 if ( flags & SDL_INIT_TIMER ) { | |
| 116 SDL_SetError("SDL not built with timer support"); | |
| 117 return(-1); | |
| 118 } | |
| 119 #endif | |
| 120 | |
| 121 #ifndef DISABLE_JOYSTICK | |
| 122 /* Initialize the joystick subsystem */ | |
| 123 if ( (flags & SDL_INIT_JOYSTICK) && | |
| 124 !(SDL_initialized & SDL_INIT_JOYSTICK) ) { | |
| 125 if ( SDL_JoystickInit() < 0 ) { | |
| 126 return(-1); | |
| 127 } | |
| 128 SDL_initialized |= SDL_INIT_JOYSTICK; | |
| 129 } | |
| 130 #else | |
| 131 if ( flags & SDL_INIT_JOYSTICK ) { | |
| 132 SDL_SetError("SDL not built with joystick support"); | |
| 133 return(-1); | |
| 134 } | |
| 135 #endif | |
| 136 | |
| 137 #ifndef DISABLE_CDROM | |
| 138 /* Initialize the CD-ROM subsystem */ | |
| 139 if ( (flags & SDL_INIT_CDROM) && !(SDL_initialized & SDL_INIT_CDROM) ) { | |
| 140 if ( SDL_CDROMInit() < 0 ) { | |
| 141 return(-1); | |
| 142 } | |
| 143 SDL_initialized |= SDL_INIT_CDROM; | |
| 144 } | |
| 145 #else | |
| 146 if ( flags & SDL_INIT_CDROM ) { | |
| 147 SDL_SetError("SDL not built with cdrom support"); | |
| 148 return(-1); | |
| 149 } | |
| 150 #endif | |
| 151 return(0); | |
| 152 } | |
| 153 | |
| 154 int SDL_Init(Uint32 flags) | |
| 155 { | |
| 397 | 156 #if !defined(DISABLE_THREADS) && defined(ENABLE_PTH) |
| 157 if (!pth_init()) { | |
| 158 return -1; | |
| 159 } | |
| 160 #endif | |
| 161 | |
| 0 | 162 /* Clear the error message */ |
| 163 SDL_ClearError(); | |
| 164 | |
| 165 /* Initialize the desired subsystems */ | |
| 166 if ( SDL_InitSubSystem(flags) < 0 ) { | |
| 167 return(-1); | |
| 168 } | |
| 169 | |
| 170 /* Everything is initialized */ | |
| 171 if ( !(flags & SDL_INIT_NOPARACHUTE) ) { | |
| 172 SDL_InstallParachute(); | |
| 173 } | |
| 174 return(0); | |
| 175 } | |
| 176 | |
| 177 void SDL_QuitSubSystem(Uint32 flags) | |
| 178 { | |
| 179 /* Shut down requested initialized subsystems */ | |
| 180 #ifndef DISABLE_CDROM | |
| 181 if ( (flags & SDL_initialized & SDL_INIT_CDROM) ) { | |
| 182 SDL_CDROMQuit(); | |
| 183 SDL_initialized &= ~SDL_INIT_CDROM; | |
| 184 } | |
| 185 #endif | |
| 186 #ifndef DISABLE_JOYSTICK | |
| 187 if ( (flags & SDL_initialized & SDL_INIT_JOYSTICK) ) { | |
| 188 SDL_JoystickQuit(); | |
| 189 SDL_initialized &= ~SDL_INIT_JOYSTICK; | |
| 190 } | |
| 191 #endif | |
| 192 #ifndef DISABLE_TIMERS | |
| 193 if ( (flags & SDL_initialized & SDL_INIT_TIMER) ) { | |
| 194 SDL_TimerQuit(); | |
| 195 SDL_initialized &= ~SDL_INIT_TIMER; | |
| 196 } | |
| 197 #endif | |
| 198 #ifndef DISABLE_AUDIO | |
| 199 if ( (flags & SDL_initialized & SDL_INIT_AUDIO) ) { | |
| 200 SDL_AudioQuit(); | |
| 201 SDL_initialized &= ~SDL_INIT_AUDIO; | |
| 202 } | |
| 203 #endif | |
| 204 #ifndef DISABLE_VIDEO | |
| 205 if ( (flags & SDL_initialized & SDL_INIT_VIDEO) ) { | |
| 206 SDL_VideoQuit(); | |
| 207 SDL_initialized &= ~SDL_INIT_VIDEO; | |
| 208 } | |
| 209 #endif | |
| 210 } | |
| 211 | |
| 212 Uint32 SDL_WasInit(Uint32 flags) | |
| 213 { | |
| 214 if ( ! flags ) { | |
| 215 flags = SDL_INIT_EVERYTHING; | |
| 216 } | |
| 217 return (SDL_initialized&flags); | |
| 218 } | |
| 219 | |
| 220 void SDL_Quit(void) | |
| 221 { | |
| 222 /* Quit all subsystems */ | |
| 1190 | 223 #ifdef DEBUG_BUILD |
| 224 printf("[SDL_Quit] : Enter! Calling QuitSubSystem()\n"); fflush(stdout); | |
| 225 #endif | |
| 0 | 226 SDL_QuitSubSystem(SDL_INIT_EVERYTHING); |
| 227 | |
| 228 #ifdef CHECK_LEAKS | |
| 1190 | 229 #ifdef DEBUG_BUILD |
| 230 printf("[SDL_Quit] : CHECK_LEAKS\n"); fflush(stdout); | |
| 231 #endif | |
| 232 | |
| 0 | 233 /* Print the number of surfaces not freed */ |
| 234 if ( surfaces_allocated != 0 ) { | |
| 235 fprintf(stderr, "SDL Warning: %d SDL surfaces extant\n", | |
| 236 surfaces_allocated); | |
| 237 } | |
| 238 #endif | |
| 1190 | 239 #ifdef DEBUG_BUILD |
| 240 printf("[SDL_Quit] : SDL_UninstallParachute()\n"); fflush(stdout); | |
| 241 #endif | |
| 0 | 242 |
| 243 /* Uninstall any parachute signal handlers */ | |
| 244 SDL_UninstallParachute(); | |
| 397 | 245 |
| 246 #if !defined(DISABLE_THREADS) && defined(ENABLE_PTH) | |
| 247 pth_kill(); | |
| 248 #endif | |
| 1190 | 249 #ifdef DEBUG_BUILD |
| 250 printf("[SDL_Quit] : Returning!\n"); fflush(stdout); | |
| 251 #endif | |
| 252 | |
| 0 | 253 } |
| 254 | |
| 255 /* Return the library version number */ | |
| 256 const SDL_version * SDL_Linked_Version(void) | |
| 257 { | |
| 258 return(&version); | |
| 259 } | |
| 260 | |
| 1190 | 261 #ifndef __OS2__ |
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262 #if defined(_WIN32_WCE) || (defined(__WATCOMC__) && defined(BUILD_DLL)) |
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263 /* Need to include DllMain() on Windows CE and Watcom C for some reason.. */ |
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264 #include <windows.h> |
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265 |
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266 BOOL APIENTRY DllMain( HANDLE hModule, |
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267 DWORD ul_reason_for_call, |
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268 LPVOID lpReserved ) |
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269 { |
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270 switch (ul_reason_for_call) { |
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271 case DLL_PROCESS_ATTACH: |
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272 case DLL_THREAD_ATTACH: |
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273 case DLL_THREAD_DETACH: |
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274 case DLL_PROCESS_DETACH: |
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275 break; |
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276 } |
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277 return TRUE; |
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278 } |
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279 #endif /* _WIN32_WCE and building DLL with Watcom C */ |
| 1190 | 280 #else |
| 281 // Building for OS/2 | |
| 282 #ifdef __WATCOMC__ | |
| 283 | |
| 284 #define INCL_DOSERRORS | |
| 285 #define INCL_DOSEXCEPTIONS | |
| 286 #include <os2.h> | |
| 287 | |
| 288 // Exception handler to prevent the Audio thread hanging, making a zombie process! | |
| 289 ULONG _System SDL_Main_ExceptionHandler(PEXCEPTIONREPORTRECORD pERepRec, | |
| 290 PEXCEPTIONREGISTRATIONRECORD pERegRec, | |
| 291 PCONTEXTRECORD pCtxRec, | |
| 292 PVOID p) | |
| 293 { | |
| 294 if (pERepRec->fHandlerFlags & EH_EXIT_UNWIND) | |
| 295 return XCPT_CONTINUE_SEARCH; | |
| 296 if (pERepRec->fHandlerFlags & EH_UNWINDING) | |
| 297 return XCPT_CONTINUE_SEARCH; | |
| 298 if (pERepRec->fHandlerFlags & EH_NESTED_CALL) | |
| 299 return XCPT_CONTINUE_SEARCH; | |
| 300 | |
| 301 // Do cleanup at every fatal exception! | |
| 302 if (((pERepRec->ExceptionNum & XCPT_SEVERITY_CODE) == XCPT_FATAL_EXCEPTION) && | |
| 303 (pERepRec->ExceptionNum != XCPT_BREAKPOINT) && | |
| 304 (pERepRec->ExceptionNum != XCPT_SINGLE_STEP) | |
| 305 ) | |
| 306 { | |
| 307 if (SDL_initialized & SDL_INIT_AUDIO) | |
| 308 { | |
| 309 // This removes the zombie audio thread in case of emergency. | |
| 310 #ifdef DEBUG_BUILD | |
| 311 printf("[SDL_Main_ExceptionHandler] : Calling SDL_CloseAudio()!\n"); | |
| 312 #endif | |
| 313 SDL_CloseAudio(); | |
| 314 } | |
| 315 } | |
| 316 return (XCPT_CONTINUE_SEARCH); | |
| 317 } | |
| 318 | |
| 319 | |
| 320 EXCEPTIONREGISTRATIONRECORD SDL_Main_xcpthand = {0, SDL_Main_ExceptionHandler}; | |
| 321 | |
| 322 // The main DLL entry for DLL Initialization and Uninitialization: | |
| 323 unsigned _System LibMain(unsigned hmod, unsigned termination) | |
| 324 { | |
| 325 if (termination) | |
| 326 { | |
| 327 #ifdef DEBUG_BUILD | |
| 328 // printf("[SDL DLL Unintialization] : Removing exception handler\n"); | |
| 329 #endif | |
| 330 DosUnsetExceptionHandler(&SDL_Main_xcpthand); | |
| 331 return 1; | |
| 332 } else | |
| 333 { | |
| 334 #ifdef DEBUG_BUILD | |
| 335 // Make stdout and stderr unbuffered! | |
| 336 setbuf(stdout, NULL); | |
| 337 setbuf(stderr, NULL); | |
| 338 #endif | |
| 339 // Fire up exception handler | |
| 340 #ifdef DEBUG_BUILD | |
| 341 // printf("[SDL DLL Initialization] : Setting exception handler\n"); | |
| 342 #endif | |
| 343 // Set exception handler | |
| 344 DosSetExceptionHandler(&SDL_Main_xcpthand); | |
| 345 | |
| 346 return 1; | |
| 347 } | |
| 348 } | |
| 349 | |
| 350 #endif | |
| 351 #endif |