Mercurial > sdl-ios-xcode
annotate src/cdrom/linux/SDL_syscdrom.c @ 4168:69bcba65c388 SDL-1.2
Fixed bug #526
Comment #1 From Simon Howard 2009-03-20 16:50:56
Hi,
I'm the author of Chocolate Doom, one of the other source ports that James
mentioned. This is a patch against the current SVN version of SDL 1.2 that
fixes the bug. It has been tested and hopefully should be obviously correct
from examining the changes. I'll give a brief explanation.
When the palette is set with SDL_SetPalette, the IDirectDrawPalette_SetEntries
DirectX function is invoked. However, when this happens, a WM_PALETTECHANGED
message is sent to the window.
A WM_PALETTECHANGED message can also be received if the palette is changed for
some other reason, like if the system palette is changed. Therefore, the
palette change handler (DX5_PaletteChanged) has code to deal with this case.
It distinguishes "expected" palette changes (set with SDL_SetPalette) from
"unexpected" palette changes using the colorchange_expected variable, which is
set before calling IDirectDrawPalette_SetEntries. However, the code to set
this variable is missing in the fullscreen code path. By setting this
variable, the palette change is handled properly and the freezes go away.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 13 Apr 2009 00:53:12 +0000 |
| parents | a1b03ba2fcd0 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 4159 | 3 Copyright (C) 1997-2009 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 |
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24 #ifdef SDL_CDROM_LINUX |
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25 |
| 0 | 26 /* Functions for system-level CD-ROM audio control */ |
| 27 | |
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28 #include <string.h> /* For strerror() */ |
| 0 | 29 #include <sys/types.h> |
| 30 #include <sys/stat.h> | |
| 31 #include <sys/ioctl.h> | |
| 32 #include <fcntl.h> | |
| 33 #include <errno.h> | |
| 34 #include <unistd.h> | |
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35 #ifdef __LINUX__ |
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36 #ifdef HAVE_LINUX_VERSION_H |
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37 /* linux 2.6.9 workaround */ |
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38 #include <linux/version.h> |
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39 #if LINUX_VERSION_CODE == KERNEL_VERSION(2,6,9) |
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40 #include <asm/types.h> |
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41 #define __le64 __u64 |
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42 #define __le32 __u32 |
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43 #define __le16 __u16 |
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44 #define __be64 __u64 |
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45 #define __be32 __u32 |
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46 #define __be16 __u16 |
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47 #endif /* linux 2.6.9 workaround */ |
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48 #endif /* HAVE_LINUX_VERSION_H */ |
| 0 | 49 #include <linux/cdrom.h> |
| 50 #endif | |
| 51 #ifdef __SVR4 | |
| 52 #include <sys/cdio.h> | |
| 53 #endif | |
| 54 | |
| 55 /* Define this to use the alternative getmntent() code */ | |
| 56 #ifndef __SVR4 | |
| 57 #define USE_MNTENT | |
| 58 #endif | |
| 59 | |
| 60 #ifdef USE_MNTENT | |
| 61 #if defined(__USLC__) | |
| 62 #include <sys/mntent.h> | |
| 63 #else | |
| 64 #include <mntent.h> | |
| 65 #endif | |
| 66 | |
| 67 #ifndef _PATH_MNTTAB | |
| 68 #ifdef MNTTAB | |
| 69 #define _PATH_MNTTAB MNTTAB | |
| 70 #else | |
| 71 #define _PATH_MNTTAB "/etc/fstab" | |
| 72 #endif | |
| 73 #endif /* !_PATH_MNTTAB */ | |
| 74 | |
| 75 #ifndef _PATH_MOUNTED | |
| 76 #define _PATH_MOUNTED "/etc/mtab" | |
| 77 #endif /* !_PATH_MOUNTED */ | |
| 78 | |
| 79 #ifndef MNTTYPE_CDROM | |
| 80 #define MNTTYPE_CDROM "iso9660" | |
| 81 #endif | |
| 82 #ifndef MNTTYPE_SUPER | |
| 83 #define MNTTYPE_SUPER "supermount" | |
| 84 #endif | |
| 85 #endif /* USE_MNTENT */ | |
| 86 | |
| 87 #include "SDL_cdrom.h" | |
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88 #include "../SDL_syscdrom.h" |
| 0 | 89 |
| 90 | |
| 91 /* The maximum number of CD-ROM drives we'll detect */ | |
| 92 #define MAX_DRIVES 16 | |
| 93 | |
| 94 /* A list of available CD-ROM drives */ | |
| 95 static char *SDL_cdlist[MAX_DRIVES]; | |
| 96 static dev_t SDL_cdmode[MAX_DRIVES]; | |
| 97 | |
| 98 /* The system-dependent CD control functions */ | |
| 99 static const char *SDL_SYS_CDName(int drive); | |
| 100 static int SDL_SYS_CDOpen(int drive); | |
| 101 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); | |
| 102 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); | |
| 103 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); | |
| 104 static int SDL_SYS_CDPause(SDL_CD *cdrom); | |
| 105 static int SDL_SYS_CDResume(SDL_CD *cdrom); | |
| 106 static int SDL_SYS_CDStop(SDL_CD *cdrom); | |
| 107 static int SDL_SYS_CDEject(SDL_CD *cdrom); | |
| 108 static void SDL_SYS_CDClose(SDL_CD *cdrom); | |
| 109 | |
| 110 /* Some ioctl() errno values which occur when the tray is empty */ | |
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111 #ifndef ENOMEDIUM |
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112 #define ENOMEDIUM ENOENT |
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113 #endif |
| 0 | 114 #define ERRNO_TRAYEMPTY(errno) \ |
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115 ((errno == EIO) || (errno == ENOENT) || \ |
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116 (errno == EINVAL) || (errno == ENOMEDIUM)) |
| 0 | 117 |
| 118 /* Check a drive to see if it is a CD-ROM */ | |
| 119 static int CheckDrive(char *drive, char *mnttype, struct stat *stbuf) | |
| 120 { | |
| 121 int is_cd, cdfd; | |
| 122 struct cdrom_subchnl info; | |
| 123 | |
| 124 /* If it doesn't exist, return -1 */ | |
| 125 if ( stat(drive, stbuf) < 0 ) { | |
| 126 return(-1); | |
| 127 } | |
| 128 | |
| 129 /* If it does exist, verify that it's an available CD-ROM */ | |
| 130 is_cd = 0; | |
| 131 if ( S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode) ) { | |
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132 cdfd = open(drive, (O_RDONLY|O_NONBLOCK), 0); |
| 0 | 133 if ( cdfd >= 0 ) { |
| 134 info.cdsc_format = CDROM_MSF; | |
| 135 /* Under Linux, EIO occurs when a disk is not present. | |
| 136 */ | |
| 137 if ( (ioctl(cdfd, CDROMSUBCHNL, &info) == 0) || | |
| 138 ERRNO_TRAYEMPTY(errno) ) { | |
| 139 is_cd = 1; | |
| 140 } | |
| 141 close(cdfd); | |
| 142 } | |
| 143 #ifdef USE_MNTENT | |
| 144 /* Even if we can't read it, it might be mounted */ | |
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145 else if ( mnttype && (SDL_strcmp(mnttype, MNTTYPE_CDROM) == 0) ) { |
| 0 | 146 is_cd = 1; |
| 147 } | |
| 148 #endif | |
| 149 } | |
| 150 return(is_cd); | |
| 151 } | |
| 152 | |
| 153 /* Add a CD-ROM drive to our list of valid drives */ | |
| 154 static void AddDrive(char *drive, struct stat *stbuf) | |
| 155 { | |
| 156 int i; | |
| 157 | |
| 158 if ( SDL_numcds < MAX_DRIVES ) { | |
| 159 /* Check to make sure it's not already in our list. | |
| 160 This can happen when we see a drive via symbolic link. | |
| 161 */ | |
| 162 for ( i=0; i<SDL_numcds; ++i ) { | |
| 163 if ( stbuf->st_rdev == SDL_cdmode[i] ) { | |
| 164 #ifdef DEBUG_CDROM | |
| 165 fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]); | |
| 166 #endif | |
| 167 return; | |
| 168 } | |
| 169 } | |
| 170 | |
| 171 /* Add this drive to our list */ | |
| 172 i = SDL_numcds; | |
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173 SDL_cdlist[i] = SDL_strdup(drive); |
| 0 | 174 if ( SDL_cdlist[i] == NULL ) { |
| 175 SDL_OutOfMemory(); | |
| 176 return; | |
| 177 } | |
| 178 SDL_cdmode[i] = stbuf->st_rdev; | |
| 179 ++SDL_numcds; | |
| 180 #ifdef DEBUG_CDROM | |
| 181 fprintf(stderr, "Added CD-ROM drive: %s\n", drive); | |
| 182 #endif | |
| 183 } | |
| 184 } | |
| 185 | |
| 186 #ifdef USE_MNTENT | |
| 187 static void CheckMounts(const char *mtab) | |
| 188 { | |
| 189 FILE *mntfp; | |
| 190 struct mntent *mntent; | |
| 191 struct stat stbuf; | |
| 192 | |
| 193 mntfp = setmntent(mtab, "r"); | |
| 194 if ( mntfp != NULL ) { | |
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195 char *tmp; |
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196 char *mnt_type; |
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197 size_t mnt_type_len; |
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198 char *mnt_dev; |
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199 size_t mnt_dev_len; |
| 0 | 200 |
| 201 while ( (mntent=getmntent(mntfp)) != NULL ) { | |
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202 mnt_type_len = SDL_strlen(mntent->mnt_type) + 1; |
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203 mnt_type = SDL_stack_alloc(char, mnt_type_len); |
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204 if (mnt_type == NULL) |
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205 continue; /* maybe you'll get lucky next time. */ |
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206 |
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207 mnt_dev_len = SDL_strlen(mntent->mnt_fsname) + 1; |
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208 mnt_dev = SDL_stack_alloc(char, mnt_dev_len); |
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209 if (mnt_dev == NULL) { |
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210 SDL_stack_free(mnt_type); |
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211 continue; |
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212 } |
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213 |
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214 SDL_strlcpy(mnt_type, mntent->mnt_type, mnt_type_len); |
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215 SDL_strlcpy(mnt_dev, mntent->mnt_fsname, mnt_dev_len); |
| 0 | 216 |
| 217 /* Handle "supermount" filesystem mounts */ | |
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218 if ( SDL_strcmp(mnt_type, MNTTYPE_SUPER) == 0 ) { |
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219 tmp = SDL_strstr(mntent->mnt_opts, "fs="); |
| 0 | 220 if ( tmp ) { |
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221 SDL_stack_free(mnt_type); |
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222 mnt_type = SDL_strdup(tmp + SDL_strlen("fs=")); |
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223 if ( mnt_type ) { |
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224 tmp = SDL_strchr(mnt_type, ','); |
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225 if ( tmp ) { |
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226 *tmp = '\0'; |
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227 } |
| 0 | 228 } |
| 229 } | |
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230 tmp = SDL_strstr(mntent->mnt_opts, "dev="); |
| 0 | 231 if ( tmp ) { |
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232 SDL_stack_free(mnt_dev); |
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233 mnt_dev = SDL_strdup(tmp + SDL_strlen("dev=")); |
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234 if ( mnt_dev ) { |
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235 tmp = SDL_strchr(mnt_dev, ','); |
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236 if ( tmp ) { |
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237 *tmp = '\0'; |
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238 } |
| 0 | 239 } |
| 240 } | |
| 241 } | |
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242 if ( SDL_strcmp(mnt_type, MNTTYPE_CDROM) == 0 ) { |
| 0 | 243 #ifdef DEBUG_CDROM |
| 244 fprintf(stderr, "Checking mount path from %s: %s mounted on %s of %s\n", | |
| 245 mtab, mnt_dev, mntent->mnt_dir, mnt_type); | |
| 246 #endif | |
| 247 if (CheckDrive(mnt_dev, mnt_type, &stbuf) > 0) { | |
| 248 AddDrive(mnt_dev, &stbuf); | |
| 249 } | |
| 250 } | |
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251 SDL_stack_free(mnt_dev); |
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252 SDL_stack_free(mnt_type); |
| 0 | 253 } |
| 254 endmntent(mntfp); | |
| 255 } | |
| 256 } | |
| 257 #endif /* USE_MNTENT */ | |
| 258 | |
| 259 int SDL_SYS_CDInit(void) | |
| 260 { | |
| 261 /* checklist: /dev/cdrom, /dev/hd?, /dev/scd? /dev/sr? */ | |
| 262 static char *checklist[] = { | |
| 263 "cdrom", "?a hd?", "?0 scd?", "?0 sr?", NULL | |
| 264 }; | |
| 265 char *SDLcdrom; | |
| 266 int i, j, exists; | |
| 267 char drive[32]; | |
| 268 struct stat stbuf; | |
| 269 | |
| 270 /* Fill in our driver capabilities */ | |
| 271 SDL_CDcaps.Name = SDL_SYS_CDName; | |
| 272 SDL_CDcaps.Open = SDL_SYS_CDOpen; | |
| 273 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; | |
| 274 SDL_CDcaps.Status = SDL_SYS_CDStatus; | |
| 275 SDL_CDcaps.Play = SDL_SYS_CDPlay; | |
| 276 SDL_CDcaps.Pause = SDL_SYS_CDPause; | |
| 277 SDL_CDcaps.Resume = SDL_SYS_CDResume; | |
| 278 SDL_CDcaps.Stop = SDL_SYS_CDStop; | |
| 279 SDL_CDcaps.Eject = SDL_SYS_CDEject; | |
| 280 SDL_CDcaps.Close = SDL_SYS_CDClose; | |
| 281 | |
| 282 /* Look in the environment for our CD-ROM drive list */ | |
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283 SDLcdrom = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */ |
| 0 | 284 if ( SDLcdrom != NULL ) { |
| 285 char *cdpath, *delim; | |
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286 size_t len = SDL_strlen(SDLcdrom)+1; |
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287 cdpath = SDL_stack_alloc(char, len); |
| 0 | 288 if ( cdpath != NULL ) { |
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289 SDL_strlcpy(cdpath, SDLcdrom, len); |
| 0 | 290 SDLcdrom = cdpath; |
| 291 do { | |
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292 delim = SDL_strchr(SDLcdrom, ':'); |
| 0 | 293 if ( delim ) { |
| 294 *delim++ = '\0'; | |
| 295 } | |
| 296 #ifdef DEBUG_CDROM | |
| 297 fprintf(stderr, "Checking CD-ROM drive from SDL_CDROM: %s\n", SDLcdrom); | |
| 298 #endif | |
| 299 if ( CheckDrive(SDLcdrom, NULL, &stbuf) > 0 ) { | |
| 300 AddDrive(SDLcdrom, &stbuf); | |
| 301 } | |
| 302 if ( delim ) { | |
| 303 SDLcdrom = delim; | |
| 304 } else { | |
| 305 SDLcdrom = NULL; | |
| 306 } | |
| 307 } while ( SDLcdrom ); | |
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308 SDL_stack_free(cdpath); |
| 0 | 309 } |
| 310 | |
| 311 /* If we found our drives, there's nothing left to do */ | |
| 312 if ( SDL_numcds > 0 ) { | |
| 313 return(0); | |
| 314 } | |
| 315 } | |
| 316 | |
| 317 #ifdef USE_MNTENT | |
| 318 /* Check /dev/cdrom first :-) */ | |
| 319 if (CheckDrive("/dev/cdrom", NULL, &stbuf) > 0) { | |
| 320 AddDrive("/dev/cdrom", &stbuf); | |
| 321 } | |
| 322 | |
| 323 /* Now check the currently mounted CD drives */ | |
| 324 CheckMounts(_PATH_MOUNTED); | |
| 325 | |
| 326 /* Finally check possible mountable drives in /etc/fstab */ | |
| 327 CheckMounts(_PATH_MNTTAB); | |
| 328 | |
| 329 /* If we found our drives, there's nothing left to do */ | |
| 330 if ( SDL_numcds > 0 ) { | |
| 331 return(0); | |
| 332 } | |
| 333 #endif /* USE_MNTENT */ | |
| 334 | |
| 335 /* Scan the system for CD-ROM drives. | |
| 336 Not always 100% reliable, so use the USE_MNTENT code above first. | |
| 337 */ | |
| 338 for ( i=0; checklist[i]; ++i ) { | |
| 339 if ( checklist[i][0] == '?' ) { | |
| 340 char *insert; | |
| 341 exists = 1; | |
| 342 for ( j=checklist[i][1]; exists; ++j ) { | |
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343 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", &checklist[i][3]); |
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344 insert = SDL_strchr(drive, '?'); |
| 0 | 345 if ( insert != NULL ) { |
| 346 *insert = j; | |
| 347 } | |
| 348 #ifdef DEBUG_CDROM | |
| 349 fprintf(stderr, "Checking possible CD-ROM drive: %s\n", drive); | |
| 350 #endif | |
| 351 switch (CheckDrive(drive, NULL, &stbuf)) { | |
| 352 /* Drive exists and is a CD-ROM */ | |
| 353 case 1: | |
| 354 AddDrive(drive, &stbuf); | |
| 355 break; | |
| 356 /* Drive exists, but isn't a CD-ROM */ | |
| 357 case 0: | |
| 358 break; | |
| 359 /* Drive doesn't exist */ | |
| 360 case -1: | |
| 361 exists = 0; | |
| 362 break; | |
| 363 } | |
| 364 } | |
| 365 } else { | |
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366 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", checklist[i]); |
| 0 | 367 #ifdef DEBUG_CDROM |
| 368 fprintf(stderr, "Checking possible CD-ROM drive: %s\n", drive); | |
| 369 #endif | |
| 370 if ( CheckDrive(drive, NULL, &stbuf) > 0 ) { | |
| 371 AddDrive(drive, &stbuf); | |
| 372 } | |
| 373 } | |
| 374 } | |
| 375 return(0); | |
| 376 } | |
| 377 | |
| 378 /* General ioctl() CD-ROM command function */ | |
| 379 static int SDL_SYS_CDioctl(int id, int command, void *arg) | |
| 380 { | |
| 381 int retval; | |
| 382 | |
| 383 retval = ioctl(id, command, arg); | |
| 384 if ( retval < 0 ) { | |
| 385 SDL_SetError("ioctl() error: %s", strerror(errno)); | |
| 386 } | |
| 387 return(retval); | |
| 388 } | |
| 389 | |
| 390 static const char *SDL_SYS_CDName(int drive) | |
| 391 { | |
| 392 return(SDL_cdlist[drive]); | |
| 393 } | |
| 394 | |
| 395 static int SDL_SYS_CDOpen(int drive) | |
| 396 { | |
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397 return(open(SDL_cdlist[drive], (O_RDONLY|O_NONBLOCK), 0)); |
| 0 | 398 } |
| 399 | |
| 400 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) | |
| 401 { | |
| 402 struct cdrom_tochdr toc; | |
| 403 int i, okay; | |
| 404 struct cdrom_tocentry entry; | |
| 405 | |
| 406 okay = 0; | |
| 407 if ( SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCHDR, &toc) == 0 ) { | |
| 408 cdrom->numtracks = toc.cdth_trk1-toc.cdth_trk0+1; | |
| 409 if ( cdrom->numtracks > SDL_MAX_TRACKS ) { | |
| 410 cdrom->numtracks = SDL_MAX_TRACKS; | |
| 411 } | |
| 412 /* Read all the track TOC entries */ | |
| 413 for ( i=0; i<=cdrom->numtracks; ++i ) { | |
| 414 if ( i == cdrom->numtracks ) { | |
| 415 cdrom->track[i].id = CDROM_LEADOUT; | |
| 416 } else { | |
| 417 cdrom->track[i].id = toc.cdth_trk0+i; | |
| 418 } | |
| 419 entry.cdte_track = cdrom->track[i].id; | |
| 420 entry.cdte_format = CDROM_MSF; | |
| 421 if ( SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCENTRY, | |
| 422 &entry) < 0 ) { | |
| 423 break; | |
| 424 } else { | |
| 425 if ( entry.cdte_ctrl & CDROM_DATA_TRACK ) { | |
| 426 cdrom->track[i].type = SDL_DATA_TRACK; | |
| 427 } else { | |
| 428 cdrom->track[i].type = SDL_AUDIO_TRACK; | |
| 429 } | |
| 430 cdrom->track[i].offset = MSF_TO_FRAMES( | |
| 431 entry.cdte_addr.msf.minute, | |
| 432 entry.cdte_addr.msf.second, | |
| 433 entry.cdte_addr.msf.frame); | |
| 434 cdrom->track[i].length = 0; | |
| 435 if ( i > 0 ) { | |
| 436 cdrom->track[i-1].length = | |
| 437 cdrom->track[i].offset- | |
| 438 cdrom->track[i-1].offset; | |
| 439 } | |
| 440 } | |
| 441 } | |
| 442 if ( i == (cdrom->numtracks+1) ) { | |
| 443 okay = 1; | |
| 444 } | |
| 445 } | |
| 446 return(okay ? 0 : -1); | |
| 447 } | |
| 448 | |
| 449 /* Get CD-ROM status */ | |
| 450 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) | |
| 451 { | |
| 452 CDstatus status; | |
| 453 struct cdrom_tochdr toc; | |
| 454 struct cdrom_subchnl info; | |
| 455 | |
| 456 info.cdsc_format = CDROM_MSF; | |
| 457 if ( ioctl(cdrom->id, CDROMSUBCHNL, &info) < 0 ) { | |
| 458 if ( ERRNO_TRAYEMPTY(errno) ) { | |
| 459 status = CD_TRAYEMPTY; | |
| 460 } else { | |
| 461 status = CD_ERROR; | |
| 462 } | |
| 463 } else { | |
| 464 switch (info.cdsc_audiostatus) { | |
| 465 case CDROM_AUDIO_INVALID: | |
| 466 case CDROM_AUDIO_NO_STATUS: | |
| 467 /* Try to determine if there's a CD available */ | |
| 468 if (ioctl(cdrom->id, CDROMREADTOCHDR, &toc)==0) | |
| 469 status = CD_STOPPED; | |
| 470 else | |
| 471 status = CD_TRAYEMPTY; | |
| 472 break; | |
| 473 case CDROM_AUDIO_COMPLETED: | |
| 474 status = CD_STOPPED; | |
| 475 break; | |
| 476 case CDROM_AUDIO_PLAY: | |
| 477 status = CD_PLAYING; | |
| 478 break; | |
| 479 case CDROM_AUDIO_PAUSED: | |
| 480 /* Workaround buggy CD-ROM drive */ | |
| 481 if ( info.cdsc_trk == CDROM_LEADOUT ) { | |
| 482 status = CD_STOPPED; | |
| 483 } else { | |
| 484 status = CD_PAUSED; | |
| 485 } | |
| 486 break; | |
| 487 default: | |
| 488 status = CD_ERROR; | |
| 489 break; | |
| 490 } | |
| 491 } | |
| 492 if ( position ) { | |
| 493 if ( status == CD_PLAYING || (status == CD_PAUSED) ) { | |
| 494 *position = MSF_TO_FRAMES( | |
| 495 info.cdsc_absaddr.msf.minute, | |
| 496 info.cdsc_absaddr.msf.second, | |
| 497 info.cdsc_absaddr.msf.frame); | |
| 498 } else { | |
| 499 *position = 0; | |
| 500 } | |
| 501 } | |
| 502 return(status); | |
| 503 } | |
| 504 | |
| 505 /* Start play */ | |
| 506 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) | |
| 507 { | |
| 508 struct cdrom_msf playtime; | |
| 509 | |
| 510 FRAMES_TO_MSF(start, | |
| 511 &playtime.cdmsf_min0, &playtime.cdmsf_sec0, &playtime.cdmsf_frame0); | |
| 512 FRAMES_TO_MSF(start+length, | |
| 513 &playtime.cdmsf_min1, &playtime.cdmsf_sec1, &playtime.cdmsf_frame1); | |
| 514 #ifdef DEBUG_CDROM | |
| 515 fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n", | |
| 516 playtime.cdmsf_min0, playtime.cdmsf_sec0, playtime.cdmsf_frame0, | |
| 517 playtime.cdmsf_min1, playtime.cdmsf_sec1, playtime.cdmsf_frame1); | |
| 518 #endif | |
| 519 return(SDL_SYS_CDioctl(cdrom->id, CDROMPLAYMSF, &playtime)); | |
| 520 } | |
| 521 | |
| 522 /* Pause play */ | |
| 523 static int SDL_SYS_CDPause(SDL_CD *cdrom) | |
| 524 { | |
| 525 return(SDL_SYS_CDioctl(cdrom->id, CDROMPAUSE, 0)); | |
| 526 } | |
| 527 | |
| 528 /* Resume play */ | |
| 529 static int SDL_SYS_CDResume(SDL_CD *cdrom) | |
| 530 { | |
| 531 return(SDL_SYS_CDioctl(cdrom->id, CDROMRESUME, 0)); | |
| 532 } | |
| 533 | |
| 534 /* Stop play */ | |
| 535 static int SDL_SYS_CDStop(SDL_CD *cdrom) | |
| 536 { | |
| 537 return(SDL_SYS_CDioctl(cdrom->id, CDROMSTOP, 0)); | |
| 538 } | |
| 539 | |
| 540 /* Eject the CD-ROM */ | |
| 541 static int SDL_SYS_CDEject(SDL_CD *cdrom) | |
| 542 { | |
| 543 return(SDL_SYS_CDioctl(cdrom->id, CDROMEJECT, 0)); | |
| 544 } | |
| 545 | |
| 546 /* Close the CD-ROM handle */ | |
| 547 static void SDL_SYS_CDClose(SDL_CD *cdrom) | |
| 548 { | |
| 549 close(cdrom->id); | |
| 550 } | |
| 551 | |
| 552 void SDL_SYS_CDQuit(void) | |
| 553 { | |
| 554 int i; | |
| 555 | |
| 556 if ( SDL_numcds > 0 ) { | |
| 557 for ( i=0; i<SDL_numcds; ++i ) { | |
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558 SDL_free(SDL_cdlist[i]); |
| 0 | 559 } |
| 560 SDL_numcds = 0; | |
| 561 } | |
| 562 } | |
| 563 | |
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564 #endif /* SDL_CDROM_LINUX */ |