Mercurial > sdl-ios-xcode
annotate src/cdrom/win32/SDL_syscdrom.c @ 1524:38a12fd1a2c1
Fixed bug #46
Date: Fri, 13 Jan 2006 18:09:45 -0500
From: mhall4400 vipmail kvcc edu
Subject: Possible SDL bug
Greetings
I believe Ive come across a bug in your SDL product (1.2.9), in the CD-ROM
control portion of the library.
When calling the SDL_CDPlay() function to play the last track of a CD using the
offset and length from an SDL_CD structure generated by SDL_CDOpen(), I get the
following error from a call to SDL_Error():
mciSendCommand() error: The specified parameter is out of range for the
specified command.
The code returning the error is:
SDL_CDPlay(g_playingDriveSDLCD,
g_playingDriveSDLCD->track[trackNumberInt].offset,
g_playingDriveSDLCD->track[trackNumberInt].length)
Subtracting one from the length of the provided length seems to repair the
problem:
SDL_CDPlay(g_playingDriveSDLCD,
g_playingDriveSDLCD->track[trackNumberInt].offset,
(g_playingDriveSDLCD->track[trackNumberInt].length) - 1)
Ive replicated this problem on Windows 98 SE (several months since last
patch), fully-patched Window ME, seldom-patched Windows XP SP1, and
fully-patched Windows XP SP2.
While investigating the issue, I came across a line in your librarys win32
source code in file \src\cdrom\win32\SDL_syscdrom.c (source code zip archive
from your download page), function: SDL_SYS_CDGetTOC(), line 226 where you add
1 to the value for length to fix MCI last track length bug. This may be the
source of the issue (because subtracting 1 from the length seems to resolve the
issue). Microsoft may have patched the referenced bug since you wrote that
line.
Mike Hall
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 14 Mar 2006 05:34:39 +0000 |
| parents | 84de7511f79f |
| children | 92947e3a18db |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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|
6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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|
8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
|
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* Functions for system-level CD-ROM audio control */ | |
| 25 | |
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26 #define WIN32_LEAN_AND_MEAN |
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27 #include <windows.h> |
| 0 | 28 #include <mmsystem.h> |
| 29 | |
| 30 #include "SDL_cdrom.h" | |
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31 #include "../SDL_syscdrom.h" |
| 0 | 32 |
| 33 /* This really broken?? */ | |
| 34 #define BROKEN_MCI_PAUSE /* Pausing actually stops play -- Doh! */ | |
| 35 | |
| 36 /* The maximum number of CD-ROM drives we'll detect (Don't change!) */ | |
| 37 #define MAX_DRIVES 26 | |
| 38 | |
| 39 /* A list of available CD-ROM drives */ | |
| 40 static char *SDL_cdlist[MAX_DRIVES]; | |
| 41 static MCIDEVICEID SDL_mciID[MAX_DRIVES]; | |
| 42 #ifdef BROKEN_MCI_PAUSE | |
| 43 static int SDL_paused[MAX_DRIVES]; | |
| 44 #endif | |
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45 static int SDL_CD_end_position; |
| 0 | 46 |
| 47 /* The system-dependent CD control functions */ | |
| 48 static const char *SDL_SYS_CDName(int drive); | |
| 49 static int SDL_SYS_CDOpen(int drive); | |
| 50 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); | |
| 51 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); | |
| 52 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); | |
| 53 static int SDL_SYS_CDPause(SDL_CD *cdrom); | |
| 54 static int SDL_SYS_CDResume(SDL_CD *cdrom); | |
| 55 static int SDL_SYS_CDStop(SDL_CD *cdrom); | |
| 56 static int SDL_SYS_CDEject(SDL_CD *cdrom); | |
| 57 static void SDL_SYS_CDClose(SDL_CD *cdrom); | |
| 58 | |
| 59 | |
| 60 /* Add a CD-ROM drive to our list of valid drives */ | |
| 61 static void AddDrive(char *drive) | |
| 62 { | |
| 63 int i; | |
| 64 | |
| 65 if ( SDL_numcds < MAX_DRIVES ) { | |
| 66 /* Add this drive to our list */ | |
| 67 i = SDL_numcds; | |
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68 SDL_cdlist[i] = SDL_strdup(drive); |
| 0 | 69 if ( SDL_cdlist[i] == NULL ) { |
| 70 SDL_OutOfMemory(); | |
| 71 return; | |
| 72 } | |
| 73 ++SDL_numcds; | |
| 74 #ifdef CDROM_DEBUG | |
| 75 fprintf(stderr, "Added CD-ROM drive: %s\n", drive); | |
| 76 #endif | |
| 77 } | |
| 78 } | |
| 79 | |
| 80 int SDL_SYS_CDInit(void) | |
| 81 { | |
| 82 /* checklist: Drive 'A' - 'Z' */ | |
| 83 int i; | |
| 84 char drive[4]; | |
| 85 | |
| 86 /* Fill in our driver capabilities */ | |
| 87 SDL_CDcaps.Name = SDL_SYS_CDName; | |
| 88 SDL_CDcaps.Open = SDL_SYS_CDOpen; | |
| 89 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; | |
| 90 SDL_CDcaps.Status = SDL_SYS_CDStatus; | |
| 91 SDL_CDcaps.Play = SDL_SYS_CDPlay; | |
| 92 SDL_CDcaps.Pause = SDL_SYS_CDPause; | |
| 93 SDL_CDcaps.Resume = SDL_SYS_CDResume; | |
| 94 SDL_CDcaps.Stop = SDL_SYS_CDStop; | |
| 95 SDL_CDcaps.Eject = SDL_SYS_CDEject; | |
| 96 SDL_CDcaps.Close = SDL_SYS_CDClose; | |
| 97 | |
| 98 /* Scan the system for CD-ROM drives */ | |
| 99 for ( i='A'; i<='Z'; ++i ) { | |
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100 SDL_snprintf(drive, SDL_arraysize(drive), "%c:\\", i); |
| 0 | 101 if ( GetDriveType(drive) == DRIVE_CDROM ) { |
| 102 AddDrive(drive); | |
| 103 } | |
| 104 } | |
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105 SDL_memset(SDL_mciID, 0, sizeof(SDL_mciID)); |
| 0 | 106 return(0); |
| 107 } | |
| 108 | |
| 109 /* General ioctl() CD-ROM command function */ | |
| 110 static int SDL_SYS_CDioctl(int id, UINT msg, DWORD flags, void *arg) | |
| 111 { | |
| 112 MCIERROR mci_error; | |
| 113 | |
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114 mci_error = mciSendCommand(SDL_mciID[id], msg, flags, (DWORD_PTR)arg); |
| 0 | 115 if ( mci_error ) { |
| 116 char error[256]; | |
| 117 | |
| 118 mciGetErrorString(mci_error, error, 256); | |
| 119 SDL_SetError("mciSendCommand() error: %s", error); | |
| 120 } | |
| 121 return(!mci_error ? 0 : -1); | |
| 122 } | |
| 123 | |
| 124 static const char *SDL_SYS_CDName(int drive) | |
| 125 { | |
| 126 return(SDL_cdlist[drive]); | |
| 127 } | |
| 128 | |
| 129 static int SDL_SYS_CDOpen(int drive) | |
| 130 { | |
| 131 MCI_OPEN_PARMS mci_open; | |
| 132 MCI_SET_PARMS mci_set; | |
| 133 char device[3]; | |
| 134 DWORD flags; | |
| 135 | |
| 136 /* Open the requested device */ | |
| 137 mci_open.lpstrDeviceType = (LPCSTR) MCI_DEVTYPE_CD_AUDIO; | |
| 138 device[0] = *SDL_cdlist[drive]; | |
| 139 device[1] = ':'; | |
| 140 device[2] = '\0'; | |
| 141 mci_open.lpstrElementName = device; | |
| 142 flags = | |
| 143 (MCI_OPEN_TYPE|MCI_OPEN_SHAREABLE|MCI_OPEN_TYPE_ID|MCI_OPEN_ELEMENT); | |
| 144 if ( SDL_SYS_CDioctl(0, MCI_OPEN, flags, &mci_open) < 0 ) { | |
| 145 flags &= ~MCI_OPEN_SHAREABLE; | |
| 146 if ( SDL_SYS_CDioctl(0, MCI_OPEN, flags, &mci_open) < 0 ) { | |
| 147 return(-1); | |
| 148 } | |
| 149 } | |
| 150 SDL_mciID[drive] = mci_open.wDeviceID; | |
| 151 | |
| 152 /* Set the minute-second-frame time format */ | |
| 153 mci_set.dwTimeFormat = MCI_FORMAT_MSF; | |
| 154 SDL_SYS_CDioctl(drive, MCI_SET, MCI_SET_TIME_FORMAT, &mci_set); | |
| 155 | |
| 156 #ifdef BROKEN_MCI_PAUSE | |
| 157 SDL_paused[drive] = 0; | |
| 158 #endif | |
| 159 return(drive); | |
| 160 } | |
| 161 | |
| 162 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) | |
| 163 { | |
| 164 MCI_STATUS_PARMS mci_status; | |
| 165 int i, okay; | |
| 166 DWORD flags; | |
| 167 | |
| 168 okay = 0; | |
| 169 mci_status.dwItem = MCI_STATUS_NUMBER_OF_TRACKS; | |
| 170 flags = MCI_STATUS_ITEM | MCI_WAIT; | |
| 171 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) == 0 ) { | |
| 172 cdrom->numtracks = mci_status.dwReturn; | |
| 173 if ( cdrom->numtracks > SDL_MAX_TRACKS ) { | |
| 174 cdrom->numtracks = SDL_MAX_TRACKS; | |
| 175 } | |
| 176 /* Read all the track TOC entries */ | |
| 177 flags = MCI_STATUS_ITEM | MCI_TRACK | MCI_WAIT; | |
| 178 for ( i=0; i<cdrom->numtracks; ++i ) { | |
| 179 cdrom->track[i].id = i+1; | |
| 180 mci_status.dwTrack = cdrom->track[i].id; | |
| 181 #ifdef MCI_CDA_STATUS_TYPE_TRACK | |
| 182 mci_status.dwItem = MCI_CDA_STATUS_TYPE_TRACK; | |
| 183 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, | |
| 184 &mci_status) < 0 ) { | |
| 185 break; | |
| 186 } | |
| 187 if ( mci_status.dwReturn == MCI_CDA_TRACK_AUDIO ) { | |
| 188 cdrom->track[i].type = SDL_AUDIO_TRACK; | |
| 189 } else { | |
| 190 cdrom->track[i].type = SDL_DATA_TRACK; | |
| 191 } | |
| 192 #else | |
| 193 cdrom->track[i].type = SDL_AUDIO_TRACK; | |
| 194 #endif | |
| 195 mci_status.dwItem = MCI_STATUS_POSITION; | |
| 196 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, | |
| 197 &mci_status) < 0 ) { | |
| 198 break; | |
| 199 } | |
| 200 cdrom->track[i].offset = MSF_TO_FRAMES( | |
| 201 MCI_MSF_MINUTE(mci_status.dwReturn), | |
| 202 MCI_MSF_SECOND(mci_status.dwReturn), | |
| 203 MCI_MSF_FRAME(mci_status.dwReturn)); | |
| 204 cdrom->track[i].length = 0; | |
| 205 if ( i > 0 ) { | |
| 206 cdrom->track[i-1].length = | |
| 207 cdrom->track[i].offset- | |
| 208 cdrom->track[i-1].offset; | |
| 209 } | |
| 210 } | |
| 211 if ( i == cdrom->numtracks ) { | |
|
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212 mci_status.dwTrack = cdrom->track[i - 1].id; |
| 0 | 213 mci_status.dwItem = MCI_STATUS_LENGTH; |
| 214 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, | |
| 215 &mci_status) == 0 ) { | |
|
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216 cdrom->track[i - 1].length = MSF_TO_FRAMES( |
| 0 | 217 MCI_MSF_MINUTE(mci_status.dwReturn), |
| 218 MCI_MSF_SECOND(mci_status.dwReturn), | |
| 1524 | 219 MCI_MSF_FRAME(mci_status.dwReturn)); |
|
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220 /* compute lead-out offset */ |
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221 cdrom->track[i].offset = cdrom->track[i - 1].offset + |
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222 cdrom->track[i - 1].length; |
| 0 | 223 cdrom->track[i].length = 0; |
| 224 okay = 1; | |
| 225 } | |
| 226 } | |
| 227 } | |
| 228 return(okay ? 0 : -1); | |
| 229 } | |
| 230 | |
| 231 /* Get CD-ROM status */ | |
| 232 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) | |
| 233 { | |
| 234 CDstatus status; | |
| 235 MCI_STATUS_PARMS mci_status; | |
| 236 DWORD flags; | |
| 237 | |
| 238 flags = MCI_STATUS_ITEM | MCI_WAIT; | |
| 239 mci_status.dwItem = MCI_STATUS_MODE; | |
| 240 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) < 0 ) { | |
| 241 status = CD_ERROR; | |
| 242 } else { | |
| 243 switch (mci_status.dwReturn) { | |
| 244 case MCI_MODE_NOT_READY: | |
| 245 case MCI_MODE_OPEN: | |
| 246 status = CD_TRAYEMPTY; | |
| 247 break; | |
| 248 case MCI_MODE_STOP: | |
| 249 #ifdef BROKEN_MCI_PAUSE | |
| 250 if ( SDL_paused[cdrom->id] ) { | |
| 251 status = CD_PAUSED; | |
| 252 } else { | |
| 253 status = CD_STOPPED; | |
| 254 } | |
| 255 #else | |
| 256 status = CD_STOPPED; | |
| 257 #endif /* BROKEN_MCI_PAUSE */ | |
| 258 break; | |
| 259 case MCI_MODE_PLAY: | |
|
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260 #ifdef BROKEN_MCI_PAUSE |
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261 if ( SDL_paused[cdrom->id] ) { |
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262 status = CD_PAUSED; |
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263 } else { |
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264 status = CD_PLAYING; |
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265 } |
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266 #else |
| 0 | 267 status = CD_PLAYING; |
|
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268 #endif /* BROKEN_MCI_PAUSE */ |
| 0 | 269 break; |
| 270 case MCI_MODE_PAUSE: | |
| 271 status = CD_PAUSED; | |
| 272 break; | |
| 273 default: | |
| 274 status = CD_ERROR; | |
| 275 break; | |
| 276 } | |
| 277 } | |
| 278 if ( position ) { | |
| 279 if ( status == CD_PLAYING || (status == CD_PAUSED) ) { | |
| 280 mci_status.dwItem = MCI_STATUS_POSITION; | |
| 281 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, | |
| 282 &mci_status) == 0 ) { | |
| 283 *position = MSF_TO_FRAMES( | |
| 284 MCI_MSF_MINUTE(mci_status.dwReturn), | |
| 285 MCI_MSF_SECOND(mci_status.dwReturn), | |
| 286 MCI_MSF_FRAME(mci_status.dwReturn)); | |
| 287 } else { | |
| 288 *position = 0; | |
| 289 } | |
| 290 } else { | |
| 291 *position = 0; | |
| 292 } | |
| 293 } | |
| 294 return(status); | |
| 295 } | |
| 296 | |
| 297 /* Start play */ | |
| 298 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) | |
| 299 { | |
| 300 MCI_PLAY_PARMS mci_play; | |
| 301 int m, s, f; | |
| 302 DWORD flags; | |
| 303 | |
| 304 flags = MCI_FROM | MCI_TO | MCI_NOTIFY; | |
| 305 mci_play.dwCallback = 0; | |
| 306 FRAMES_TO_MSF(start, &m, &s, &f); | |
| 307 mci_play.dwFrom = MCI_MAKE_MSF(m, s, f); | |
| 308 FRAMES_TO_MSF(start+length, &m, &s, &f); | |
| 309 mci_play.dwTo = MCI_MAKE_MSF(m, s, f); | |
|
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Date: Fri, 16 Jul 2004 17:25:45 +0200
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310 SDL_CD_end_position = mci_play.dwTo; |
| 0 | 311 return(SDL_SYS_CDioctl(cdrom->id, MCI_PLAY, flags, &mci_play)); |
| 312 } | |
| 313 | |
| 314 /* Pause play */ | |
| 315 static int SDL_SYS_CDPause(SDL_CD *cdrom) | |
| 316 { | |
| 317 #ifdef BROKEN_MCI_PAUSE | |
| 318 SDL_paused[cdrom->id] = 1; | |
| 319 #endif | |
| 320 return(SDL_SYS_CDioctl(cdrom->id, MCI_PAUSE, MCI_WAIT, NULL)); | |
| 321 } | |
| 322 | |
| 323 /* Resume play */ | |
| 324 static int SDL_SYS_CDResume(SDL_CD *cdrom) | |
| 325 { | |
| 326 #ifdef BROKEN_MCI_PAUSE | |
| 327 MCI_STATUS_PARMS mci_status; | |
| 328 int okay; | |
| 329 int flags; | |
| 330 | |
| 331 okay = 0; | |
|
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Date: Fri, 16 Jul 2004 17:25:45 +0200
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diff
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332 /* Play from the current play position to the end position set earlier */ |
| 0 | 333 flags = MCI_STATUS_ITEM | MCI_WAIT; |
| 334 mci_status.dwItem = MCI_STATUS_POSITION; | |
| 335 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) == 0 ) { | |
| 336 MCI_PLAY_PARMS mci_play; | |
| 337 | |
|
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338 flags = MCI_FROM | MCI_TO | MCI_NOTIFY; |
| 0 | 339 mci_play.dwCallback = 0; |
| 340 mci_play.dwFrom = mci_status.dwReturn; | |
|
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Date: Fri, 16 Jul 2004 17:25:45 +0200
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diff
changeset
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341 mci_play.dwTo = SDL_CD_end_position; |
| 0 | 342 if (SDL_SYS_CDioctl(cdrom->id,MCI_PLAY,flags,&mci_play) == 0) { |
| 343 okay = 1; | |
| 344 SDL_paused[cdrom->id] = 0; | |
| 345 } | |
| 346 } | |
| 347 return(okay ? 0 : -1); | |
| 348 #else | |
| 349 return(SDL_SYS_CDioctl(cdrom->id, MCI_RESUME, MCI_WAIT, NULL)); | |
| 350 #endif /* BROKEN_MCI_PAUSE */ | |
| 351 } | |
| 352 | |
| 353 /* Stop play */ | |
| 354 static int SDL_SYS_CDStop(SDL_CD *cdrom) | |
| 355 { | |
| 356 return(SDL_SYS_CDioctl(cdrom->id, MCI_STOP, MCI_WAIT, NULL)); | |
| 357 } | |
| 358 | |
| 359 /* Eject the CD-ROM */ | |
| 360 static int SDL_SYS_CDEject(SDL_CD *cdrom) | |
| 361 { | |
| 362 return(SDL_SYS_CDioctl(cdrom->id, MCI_SET, MCI_SET_DOOR_OPEN, NULL)); | |
| 363 } | |
| 364 | |
| 365 /* Close the CD-ROM handle */ | |
| 366 static void SDL_SYS_CDClose(SDL_CD *cdrom) | |
| 367 { | |
| 368 SDL_SYS_CDioctl(cdrom->id, MCI_CLOSE, MCI_WAIT, NULL); | |
| 369 } | |
| 370 | |
| 371 void SDL_SYS_CDQuit(void) | |
| 372 { | |
| 373 int i; | |
| 374 | |
| 375 if ( SDL_numcds > 0 ) { | |
| 376 for ( i=0; i<SDL_numcds; ++i ) { | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1330
diff
changeset
|
377 SDL_free(SDL_cdlist[i]); |
| 0 | 378 } |
| 379 SDL_numcds = 0; | |
| 380 } | |
| 381 } |