filename | src/drivers/cdrom/cdrom.c |
changeset | 1177:bd5893522efc |
prev | 1109:700c5ab26a63 |
next | 1296:30ecee61f811 |
author | Nathan Keynes <nkeynes@lxdream.org> |
date | Sat Sep 17 22:35:45 2011 +1000 (12 years ago) |
permissions | -rw-r--r-- |
last change | When initial disc read-toc fails, return the actual failure error code rather than overwriting it with LX_ERR_FILE_UNKNOWN - if the read-toc failed, we identified the file, it just didn't work |
file | annotate | diff | log | raw |
nkeynes@1097 | 1 | /** |
nkeynes@1097 | 2 | * $Id$ |
nkeynes@1097 | 3 | * |
nkeynes@1097 | 4 | * Copyright (c) 2009 Nathan Keynes. |
nkeynes@1097 | 5 | * |
nkeynes@1097 | 6 | * This program is free software; you can redistribute it and/or modify |
nkeynes@1097 | 7 | * it under the terms of the GNU General Public License as published by |
nkeynes@1097 | 8 | * the Free Software Foundation; either version 2 of the License, or |
nkeynes@1097 | 9 | * (at your option) any later version. |
nkeynes@1097 | 10 | * |
nkeynes@1097 | 11 | * This program is distributed in the hope that it will be useful, |
nkeynes@1097 | 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
nkeynes@1097 | 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
nkeynes@1097 | 14 | * GNU General Public License for more details. |
nkeynes@1097 | 15 | */ |
nkeynes@1097 | 16 | |
nkeynes@1097 | 17 | #include <assert.h> |
nkeynes@1097 | 18 | #include <errno.h> |
nkeynes@1097 | 19 | #include <fcntl.h> |
nkeynes@1097 | 20 | #include <stdio.h> |
nkeynes@1097 | 21 | #include <string.h> |
nkeynes@1097 | 22 | #include <glib/gmem.h> |
nkeynes@1097 | 23 | #include <glib/gstrfuncs.h> |
nkeynes@1097 | 24 | #include "lxdream.h" |
nkeynes@1097 | 25 | #include "drivers/cdrom/cdrom.h" |
nkeynes@1097 | 26 | #include "drivers/cdrom/cdimpl.h" |
nkeynes@1108 | 27 | #include "drivers/cdrom/isofs.h" |
nkeynes@1097 | 28 | |
nkeynes@1097 | 29 | extern struct cdrom_disc_factory linux_cdrom_drive_factory; |
nkeynes@1097 | 30 | extern struct cdrom_disc_factory nrg_disc_factory; |
nkeynes@1097 | 31 | extern struct cdrom_disc_factory cdi_disc_factory; |
nkeynes@1097 | 32 | extern struct cdrom_disc_factory gdi_disc_factory; |
nkeynes@1097 | 33 | |
nkeynes@1097 | 34 | cdrom_disc_factory_t cdrom_disc_factories[] = { |
nkeynes@1097 | 35 | #ifdef HAVE_LINUX_CDROM |
nkeynes@1097 | 36 | &linux_cdrom_drive_factory, |
nkeynes@1097 | 37 | #endif |
nkeynes@1097 | 38 | &nrg_disc_factory, |
nkeynes@1097 | 39 | &cdi_disc_factory, |
nkeynes@1097 | 40 | &gdi_disc_factory, |
nkeynes@1097 | 41 | NULL }; |
nkeynes@1097 | 42 | |
nkeynes@1097 | 43 | /********************* Implementation Support functions ************************/ |
nkeynes@1097 | 44 | |
nkeynes@1097 | 45 | cdrom_error_t default_image_read_blocks( sector_source_t source, cdrom_lba_t lba, cdrom_count_t count, |
nkeynes@1097 | 46 | unsigned char *buf ) |
nkeynes@1097 | 47 | { |
nkeynes@1097 | 48 | assert( 0 && "read_blocks called on a cdrom disc" ); |
nkeynes@1097 | 49 | return CDROM_ERROR_BADREAD; |
nkeynes@1097 | 50 | } |
nkeynes@1097 | 51 | |
nkeynes@1097 | 52 | cdrom_error_t default_image_read_sectors( sector_source_t source, cdrom_lba_t lba, cdrom_count_t count, |
nkeynes@1097 | 53 | cdrom_read_mode_t mode, unsigned char *buf, size_t *length ) |
nkeynes@1097 | 54 | { |
nkeynes@1097 | 55 | assert( IS_SECTOR_SOURCE_TYPE(source,DISC_SECTOR_SOURCE) ); |
nkeynes@1097 | 56 | cdrom_disc_t disc = (cdrom_disc_t)source; |
nkeynes@1097 | 57 | size_t len = 0, tmplen; |
nkeynes@1097 | 58 | cdrom_count_t current = 0; |
nkeynes@1097 | 59 | |
nkeynes@1097 | 60 | while( current < count ) { |
nkeynes@1097 | 61 | cdrom_track_t track = cdrom_disc_get_track_by_lba( disc, lba + current ); |
nkeynes@1097 | 62 | if( track == NULL ) |
nkeynes@1097 | 63 | return CDROM_ERROR_BADREAD; |
nkeynes@1097 | 64 | uint32_t track_size = cdrom_disc_get_track_size( disc, track ); |
nkeynes@1097 | 65 | cdrom_lba_t track_offset = lba + current - track->lba; |
nkeynes@1097 | 66 | cdrom_count_t sub_count = count - current; |
nkeynes@1097 | 67 | if( track_size - track_offset < sub_count ) |
nkeynes@1097 | 68 | /* Read breaks across track boundaries. This will probably fail (due |
nkeynes@1097 | 69 | * to inter-track gaps), but try it just in case |
nkeynes@1097 | 70 | */ |
nkeynes@1097 | 71 | sub_count = track_size - track_offset; |
nkeynes@1097 | 72 | cdrom_error_t err = track->source->read_sectors( track->source, track_offset, sub_count, mode, &buf[len], &tmplen ); |
nkeynes@1097 | 73 | if( err != CDROM_ERROR_OK ) |
nkeynes@1097 | 74 | return err; |
nkeynes@1097 | 75 | len += tmplen; |
nkeynes@1097 | 76 | current += sub_count; |
nkeynes@1097 | 77 | } |
nkeynes@1099 | 78 | if( length != NULL ) |
nkeynes@1099 | 79 | *length = len; |
nkeynes@1097 | 80 | return CDROM_ERROR_OK; |
nkeynes@1097 | 81 | } |
nkeynes@1097 | 82 | |
nkeynes@1097 | 83 | void default_cdrom_disc_destroy( sector_source_t source ) |
nkeynes@1097 | 84 | { |
nkeynes@1097 | 85 | assert( IS_SECTOR_SOURCE_TYPE(source,DISC_SECTOR_SOURCE) ); |
nkeynes@1097 | 86 | cdrom_disc_t disc = (cdrom_disc_t)source; |
nkeynes@1097 | 87 | int i; |
nkeynes@1097 | 88 | |
nkeynes@1097 | 89 | for( i=0; i<disc->track_count; i++ ) { |
nkeynes@1097 | 90 | sector_source_unref( disc->track[i].source ); |
nkeynes@1097 | 91 | } |
nkeynes@1097 | 92 | sector_source_unref( disc->base_source ); |
nkeynes@1097 | 93 | g_free( (char *)disc->name ); |
nkeynes@1097 | 94 | |
nkeynes@1097 | 95 | default_sector_source_destroy( source ); |
nkeynes@1097 | 96 | } |
nkeynes@1097 | 97 | |
nkeynes@1097 | 98 | cdrom_disc_t cdrom_disc_init( cdrom_disc_t disc, const char *filename ) |
nkeynes@1097 | 99 | { |
nkeynes@1097 | 100 | sector_source_init( &disc->source, DISC_SECTOR_SOURCE, SECTOR_UNKNOWN, 0, default_image_read_blocks, |
nkeynes@1097 | 101 | default_cdrom_disc_destroy ); |
nkeynes@1097 | 102 | disc->source.read_sectors = default_image_read_sectors; |
nkeynes@1097 | 103 | disc->disc_type = CDROM_DISC_NONE; |
nkeynes@1097 | 104 | disc->track_count = disc->session_count = 0; |
nkeynes@1097 | 105 | for( int i=0; i<99; i++ ) { |
nkeynes@1097 | 106 | disc->track[i].trackno = i+1; |
nkeynes@1097 | 107 | } |
nkeynes@1097 | 108 | if( filename != NULL ) |
nkeynes@1097 | 109 | disc->name = g_strdup(filename); |
nkeynes@1097 | 110 | return disc; |
nkeynes@1097 | 111 | } |
nkeynes@1097 | 112 | |
nkeynes@1097 | 113 | cdrom_disc_t cdrom_disc_new( const char *name, ERROR *err ) |
nkeynes@1097 | 114 | { |
nkeynes@1097 | 115 | cdrom_disc_t disc = g_malloc0( sizeof(struct cdrom_disc) ); |
nkeynes@1097 | 116 | if( disc != NULL ) { |
nkeynes@1097 | 117 | cdrom_disc_init( disc, name ); |
nkeynes@1097 | 118 | } else { |
nkeynes@1109 | 119 | SET_ERROR(err, LX_ERR_NOMEM, "Unable to allocate memory for cdrom disc"); |
nkeynes@1097 | 120 | } |
nkeynes@1097 | 121 | return disc; |
nkeynes@1097 | 122 | } |
nkeynes@1097 | 123 | |
nkeynes@1097 | 124 | /** |
nkeynes@1097 | 125 | * Construct a new image-based disc using the given filename as the base source. |
nkeynes@1097 | 126 | * TOC is initialized to the empty values. |
nkeynes@1097 | 127 | */ |
nkeynes@1097 | 128 | static cdrom_disc_t cdrom_disc_image_new( const char *filename, ERROR *err ) |
nkeynes@1097 | 129 | { |
nkeynes@1097 | 130 | cdrom_disc_t disc = cdrom_disc_new( filename, err ); |
nkeynes@1097 | 131 | if( disc != NULL && filename != NULL ) { |
nkeynes@1097 | 132 | disc->base_source = file_sector_source_new_filename( filename, SECTOR_UNKNOWN, 0, FILE_SECTOR_FULL_FILE ); |
nkeynes@1097 | 133 | if( disc->base_source == NULL ) { |
nkeynes@1109 | 134 | SET_ERROR( err, LX_ERR_FILE_NOOPEN, "Unable to open cdrom file '%s': %s", filename, strerror(errno) ); |
nkeynes@1097 | 135 | cdrom_disc_unref(disc); |
nkeynes@1097 | 136 | disc = NULL; |
nkeynes@1097 | 137 | } else { |
nkeynes@1097 | 138 | sector_source_ref(disc->base_source); |
nkeynes@1097 | 139 | } |
nkeynes@1097 | 140 | |
nkeynes@1097 | 141 | } |
nkeynes@1097 | 142 | return disc; |
nkeynes@1097 | 143 | } |
nkeynes@1097 | 144 | |
nkeynes@1097 | 145 | cdrom_lba_t cdrom_disc_compute_leadout( cdrom_disc_t disc ) |
nkeynes@1097 | 146 | { |
nkeynes@1097 | 147 | if( disc->track_count == 0 ) { |
nkeynes@1097 | 148 | disc->leadout = 0; |
nkeynes@1097 | 149 | } else { |
nkeynes@1097 | 150 | cdrom_track_t last_track = &disc->track[disc->track_count-1]; |
nkeynes@1097 | 151 | if( last_track->source != NULL ) { |
nkeynes@1097 | 152 | cdrom_lba_t leadout = last_track->lba + last_track->source->size; |
nkeynes@1097 | 153 | if( leadout > disc->leadout ) |
nkeynes@1097 | 154 | disc->leadout = leadout; |
nkeynes@1097 | 155 | } |
nkeynes@1097 | 156 | } |
nkeynes@1097 | 157 | return disc->leadout; |
nkeynes@1097 | 158 | } |
nkeynes@1097 | 159 | |
nkeynes@1097 | 160 | |
nkeynes@1097 | 161 | void cdrom_disc_set_default_disc_type( cdrom_disc_t disc ) |
nkeynes@1097 | 162 | { |
nkeynes@1097 | 163 | int type = CDROM_DISC_NONE, i; |
nkeynes@1097 | 164 | for( i=0; i<disc->track_count; i++ ) { |
nkeynes@1097 | 165 | if( (disc->track[i].flags & TRACK_FLAG_DATA == 0) ) { |
nkeynes@1097 | 166 | if( type == CDROM_DISC_NONE ) |
nkeynes@1097 | 167 | type = CDROM_DISC_AUDIO; |
nkeynes@1097 | 168 | } else if( disc->track[i].source != NULL && |
nkeynes@1097 | 169 | (disc->track[i].source->mode == SECTOR_MODE1 || |
nkeynes@1097 | 170 | disc->track[i].source->mode == SECTOR_RAW_NONXA) ) { |
nkeynes@1097 | 171 | if( type != CDROM_DISC_XA ) |
nkeynes@1097 | 172 | type = CDROM_DISC_NONXA; |
nkeynes@1097 | 173 | } else { |
nkeynes@1097 | 174 | type = CDROM_DISC_XA; |
nkeynes@1097 | 175 | break; |
nkeynes@1097 | 176 | } |
nkeynes@1097 | 177 | } |
nkeynes@1097 | 178 | disc->disc_type = type; |
nkeynes@1097 | 179 | } |
nkeynes@1097 | 180 | |
nkeynes@1097 | 181 | void cdrom_disc_clear_toc( cdrom_disc_t disc ) |
nkeynes@1097 | 182 | { |
nkeynes@1097 | 183 | disc->disc_type = CDROM_DISC_NONE; |
nkeynes@1097 | 184 | disc->leadout = 0; |
nkeynes@1097 | 185 | disc->track_count = 0; |
nkeynes@1097 | 186 | disc->session_count = 0; |
nkeynes@1097 | 187 | for( unsigned i=0; i< CDROM_MAX_TRACKS; i++ ) { |
nkeynes@1097 | 188 | if( disc->track[i].source != NULL ) { |
nkeynes@1097 | 189 | sector_source_unref( disc->track[i].source ); |
nkeynes@1097 | 190 | disc->track[i].source = NULL; |
nkeynes@1097 | 191 | } |
nkeynes@1097 | 192 | } |
nkeynes@1097 | 193 | } |
nkeynes@1097 | 194 | |
nkeynes@1097 | 195 | gboolean cdrom_disc_read_toc( cdrom_disc_t disc, ERROR *err ) |
nkeynes@1097 | 196 | { |
nkeynes@1108 | 197 | if( disc->read_toc != NULL ) { |
nkeynes@1108 | 198 | /* First set the defaults for an empty disc */ |
nkeynes@1108 | 199 | cdrom_disc_clear_toc(disc); |
nkeynes@1097 | 200 | |
nkeynes@1108 | 201 | if( disc->read_toc(disc, err ) ) { |
nkeynes@1108 | 202 | /* Success - update disc type and leadout if the TOC read didn't set them */ |
nkeynes@1108 | 203 | if( disc->disc_type == CDROM_DISC_NONE ) |
nkeynes@1108 | 204 | cdrom_disc_set_default_disc_type(disc); |
nkeynes@1108 | 205 | cdrom_disc_compute_leadout(disc); |
nkeynes@1108 | 206 | return TRUE; |
nkeynes@1108 | 207 | } else { |
nkeynes@1108 | 208 | /* Reset to an empty disc in case the reader left things in an |
nkeynes@1108 | 209 | * inconsistent state */ |
nkeynes@1108 | 210 | cdrom_disc_clear_toc(disc); |
nkeynes@1108 | 211 | return FALSE; |
nkeynes@1108 | 212 | } |
nkeynes@1108 | 213 | } else { |
nkeynes@1097 | 214 | return TRUE; |
nkeynes@1097 | 215 | } |
nkeynes@1097 | 216 | } |
nkeynes@1097 | 217 | |
nkeynes@1097 | 218 | FILE *cdrom_disc_get_base_file( cdrom_disc_t disc ) |
nkeynes@1097 | 219 | { |
nkeynes@1097 | 220 | return file_sector_source_get_file(disc->base_source); |
nkeynes@1097 | 221 | } |
nkeynes@1097 | 222 | |
nkeynes@1097 | 223 | /*************************** Public functions ***************************/ |
nkeynes@1097 | 224 | |
nkeynes@1097 | 225 | cdrom_disc_t cdrom_disc_open( const char *inFilename, ERROR *err ) |
nkeynes@1097 | 226 | { |
nkeynes@1097 | 227 | const gchar *filename = inFilename; |
nkeynes@1097 | 228 | const gchar *ext = strrchr(filename, '.'); |
nkeynes@1097 | 229 | int i; |
nkeynes@1097 | 230 | cdrom_disc_factory_t extclz = NULL; |
nkeynes@1097 | 231 | |
nkeynes@1097 | 232 | /* Ask the drive list if it recognizes the name first */ |
nkeynes@1097 | 233 | cdrom_drive_t drive = cdrom_drive_find(inFilename); |
nkeynes@1097 | 234 | if( drive != NULL ) { |
nkeynes@1097 | 235 | return cdrom_drive_open(drive, err); |
nkeynes@1097 | 236 | } |
nkeynes@1097 | 237 | |
nkeynes@1097 | 238 | cdrom_disc_t disc = cdrom_disc_image_new( filename, err ); |
nkeynes@1097 | 239 | if( disc == NULL ) |
nkeynes@1097 | 240 | return NULL; |
nkeynes@1097 | 241 | |
nkeynes@1097 | 242 | /* check file extensions first */ |
nkeynes@1097 | 243 | FILE *f = file_sector_source_get_file(disc->base_source); |
nkeynes@1097 | 244 | if( ext != NULL ) { |
nkeynes@1097 | 245 | ext++; /* Skip the '.' */ |
nkeynes@1097 | 246 | for( i=0; cdrom_disc_factories[i] != NULL; i++ ) { |
nkeynes@1097 | 247 | if( cdrom_disc_factories[i]->extension != NULL && |
nkeynes@1097 | 248 | strcasecmp( cdrom_disc_factories[i]->extension, ext ) == 0 ) { |
nkeynes@1097 | 249 | extclz = cdrom_disc_factories[i]; |
nkeynes@1097 | 250 | if( extclz->is_valid_file(f) ) { |
nkeynes@1097 | 251 | disc->read_toc = extclz->read_toc; |
nkeynes@1097 | 252 | } |
nkeynes@1097 | 253 | break; |
nkeynes@1097 | 254 | } |
nkeynes@1097 | 255 | } |
nkeynes@1097 | 256 | } |
nkeynes@1097 | 257 | |
nkeynes@1097 | 258 | if( disc->read_toc == NULL ) { |
nkeynes@1097 | 259 | /* Okay, fall back to magic */ |
nkeynes@1097 | 260 | for( i=0; cdrom_disc_factories[i] != NULL; i++ ) { |
nkeynes@1097 | 261 | if( cdrom_disc_factories[i] != extclz && |
nkeynes@1097 | 262 | cdrom_disc_factories[i]->is_valid_file(f) ) { |
nkeynes@1097 | 263 | disc->read_toc = cdrom_disc_factories[i]->read_toc; |
nkeynes@1097 | 264 | break; |
nkeynes@1097 | 265 | } |
nkeynes@1097 | 266 | } |
nkeynes@1097 | 267 | } |
nkeynes@1097 | 268 | |
nkeynes@1177 | 269 | if( disc->read_toc == NULL ) { |
nkeynes@1097 | 270 | /* No handler found for file */ |
nkeynes@1097 | 271 | cdrom_disc_unref( disc ); |
nkeynes@1109 | 272 | SET_ERROR( err, LX_ERR_FILE_UNKNOWN, "File '%s' could not be recognized as any known image file or device type", filename ); |
nkeynes@1097 | 273 | return NULL; |
nkeynes@1177 | 274 | } else if( !cdrom_disc_read_toc( disc, err ) ) { |
nkeynes@1177 | 275 | cdrom_disc_unref( disc ); |
nkeynes@1177 | 276 | assert( err == NULL || err->code != LX_ERR_NONE ); /* Read-toc should have set an error code in this case */ |
nkeynes@1177 | 277 | return NULL; |
nkeynes@1177 | 278 | } else { |
nkeynes@1177 | 279 | /* All good */ |
nkeynes@1177 | 280 | return disc; |
nkeynes@1097 | 281 | } |
nkeynes@1097 | 282 | } |
nkeynes@1097 | 283 | |
nkeynes@1097 | 284 | /** |
nkeynes@1108 | 285 | * Construct a disc around a source track. |
nkeynes@1108 | 286 | * @param type Disc type, which must be compatible with the track mode |
nkeynes@1108 | 287 | * @param track The source of data for the main track |
nkeynes@1108 | 288 | * @param lba The position on disc of the main track. If non-zero, |
nkeynes@1108 | 289 | * a filler track is added before it, in 2 separate sessions. |
nkeynes@1108 | 290 | */ |
nkeynes@1109 | 291 | cdrom_disc_t cdrom_disc_new_from_track( cdrom_disc_type_t type, sector_source_t track, cdrom_lba_t lba, ERROR *err ) |
nkeynes@1108 | 292 | { |
nkeynes@1108 | 293 | cdrom_disc_t disc = cdrom_disc_new( NULL, NULL ); |
nkeynes@1108 | 294 | if( disc != NULL ) { |
nkeynes@1108 | 295 | disc->disc_type = type; |
nkeynes@1108 | 296 | int trackno = 0; |
nkeynes@1108 | 297 | if( lba != 0 ) { |
nkeynes@1108 | 298 | cdrom_count_t size = lba - 150; |
nkeynes@1108 | 299 | if( lba < 150 ) |
nkeynes@1108 | 300 | size = lba; |
nkeynes@1108 | 301 | disc->track[0].trackno = 1; |
nkeynes@1108 | 302 | disc->track[0].sessionno = 1; |
nkeynes@1108 | 303 | disc->track[0].lba = 0; |
nkeynes@1108 | 304 | disc->track[0].flags = 0; |
nkeynes@1108 | 305 | disc->track[0].source = null_sector_source_new( SECTOR_CDDA, size ); |
nkeynes@1108 | 306 | sector_source_ref( disc->track[0].source ); |
nkeynes@1108 | 307 | trackno++; |
nkeynes@1108 | 308 | } |
nkeynes@1108 | 309 | disc->track[trackno].trackno = trackno+1; |
nkeynes@1108 | 310 | disc->track[trackno].sessionno = trackno+1; |
nkeynes@1108 | 311 | disc->track[trackno].lba = lba; |
nkeynes@1108 | 312 | disc->track[trackno].flags = (track->mode == SECTOR_CDDA ? 0 : TRACK_FLAG_DATA); |
nkeynes@1108 | 313 | disc->track[trackno].source = track; |
nkeynes@1108 | 314 | sector_source_ref(track); |
nkeynes@1108 | 315 | |
nkeynes@1108 | 316 | disc->track_count = trackno+1; |
nkeynes@1108 | 317 | disc->session_count = trackno+1; |
nkeynes@1108 | 318 | cdrom_disc_compute_leadout(disc); |
nkeynes@1109 | 319 | } else { |
nkeynes@1109 | 320 | SET_ERROR(err, LX_ERR_NOMEM, "Unable to allocate memory for cdrom disc"); |
nkeynes@1108 | 321 | } |
nkeynes@1108 | 322 | return disc; |
nkeynes@1108 | 323 | } |
nkeynes@1108 | 324 | |
nkeynes@1108 | 325 | /** |
nkeynes@1108 | 326 | * Construct a disc around an IsoImage track (convenience function) |
nkeynes@1108 | 327 | */ |
nkeynes@1108 | 328 | cdrom_disc_t cdrom_disc_new_from_iso_image( cdrom_disc_type_t type, IsoImage *iso, cdrom_lba_t lba, |
nkeynes@1108 | 329 | const char *bootstrap, ERROR *err ) |
nkeynes@1108 | 330 | { |
nkeynes@1108 | 331 | sector_mode_t mode = (type == CDROM_DISC_NONXA ? SECTOR_MODE1 : SECTOR_MODE2_FORM1 ); |
nkeynes@1108 | 332 | sector_source_t source = iso_sector_source_new( iso, mode, lba, bootstrap, err ); |
nkeynes@1108 | 333 | if( source != NULL ) { |
nkeynes@1109 | 334 | cdrom_disc_t disc = cdrom_disc_new_from_track(type, source, lba, err); |
nkeynes@1108 | 335 | if( disc == NULL ) { |
nkeynes@1108 | 336 | sector_source_unref( source ); |
nkeynes@1108 | 337 | } else { |
nkeynes@1108 | 338 | return disc; |
nkeynes@1108 | 339 | } |
nkeynes@1108 | 340 | } |
nkeynes@1108 | 341 | return NULL; |
nkeynes@1108 | 342 | } |
nkeynes@1108 | 343 | |
nkeynes@1108 | 344 | /** |
nkeynes@1097 | 345 | * Get the track information for the given track. If there is no such track, |
nkeynes@1097 | 346 | * return NULL; |
nkeynes@1097 | 347 | */ |
nkeynes@1097 | 348 | cdrom_track_t cdrom_disc_get_track( cdrom_disc_t disc, cdrom_trackno_t track ) |
nkeynes@1097 | 349 | { |
nkeynes@1097 | 350 | if( track < 1 || track >= disc->track_count ) |
nkeynes@1097 | 351 | return NULL; |
nkeynes@1097 | 352 | return &disc->track[track-1]; |
nkeynes@1097 | 353 | } |
nkeynes@1097 | 354 | |
nkeynes@1097 | 355 | /** |
nkeynes@1097 | 356 | * Get the track information for the first track of the given session. If there |
nkeynes@1097 | 357 | * is no such session, return NULL; |
nkeynes@1097 | 358 | */ |
nkeynes@1097 | 359 | cdrom_track_t cdrom_disc_get_session( cdrom_disc_t disc, cdrom_sessionno_t session ) |
nkeynes@1097 | 360 | { |
nkeynes@1097 | 361 | for( unsigned i=0; i< disc->track_count; i++ ) { |
nkeynes@1097 | 362 | if( disc->track[i].sessionno == session ) |
nkeynes@1097 | 363 | return &disc->track[i]; |
nkeynes@1097 | 364 | } |
nkeynes@1097 | 365 | return NULL; |
nkeynes@1097 | 366 | } |
nkeynes@1097 | 367 | |
nkeynes@1097 | 368 | cdrom_count_t cdrom_disc_get_track_size( cdrom_disc_t disc, cdrom_track_t track ) |
nkeynes@1097 | 369 | { |
nkeynes@1097 | 370 | if( track->trackno == disc->track_count ) |
nkeynes@1097 | 371 | return disc->leadout - track->lba; |
nkeynes@1097 | 372 | else |
nkeynes@1097 | 373 | return disc->track[track->trackno].lba - track->lba; |
nkeynes@1097 | 374 | } |
nkeynes@1097 | 375 | |
nkeynes@1097 | 376 | cdrom_track_t cdrom_disc_get_last_track( cdrom_disc_t disc ) |
nkeynes@1097 | 377 | { |
nkeynes@1097 | 378 | if( disc->track_count == 0 ) |
nkeynes@1097 | 379 | return NULL; |
nkeynes@1097 | 380 | return &disc->track[disc->track_count-1]; |
nkeynes@1097 | 381 | } |
nkeynes@1097 | 382 | |
nkeynes@1099 | 383 | cdrom_track_t cdrom_disc_get_last_data_track( cdrom_disc_t disc ) |
nkeynes@1099 | 384 | { |
nkeynes@1099 | 385 | for( unsigned i=disc->track_count; i>0; i-- ) { |
nkeynes@1099 | 386 | if( disc->track[i-1].flags & TRACK_FLAG_DATA ) { |
nkeynes@1099 | 387 | return &disc->track[i-1]; |
nkeynes@1099 | 388 | } |
nkeynes@1099 | 389 | } |
nkeynes@1099 | 390 | return NULL; |
nkeynes@1099 | 391 | } |
nkeynes@1097 | 392 | cdrom_track_t cdrom_disc_prev_track( cdrom_disc_t disc, cdrom_track_t track ) |
nkeynes@1097 | 393 | { |
nkeynes@1097 | 394 | if( track->trackno <= 1 ) |
nkeynes@1097 | 395 | return NULL; |
nkeynes@1097 | 396 | return cdrom_disc_get_track( disc, track->trackno-1 ); |
nkeynes@1097 | 397 | } |
nkeynes@1097 | 398 | |
nkeynes@1097 | 399 | cdrom_track_t cdrom_disc_next_track( cdrom_disc_t disc, cdrom_track_t track ) |
nkeynes@1097 | 400 | { |
nkeynes@1097 | 401 | if( track->trackno >= disc->track_count ) |
nkeynes@1097 | 402 | return NULL; |
nkeynes@1097 | 403 | return cdrom_disc_get_track( disc, track->trackno+1 ); |
nkeynes@1097 | 404 | } |
nkeynes@1097 | 405 | |
nkeynes@1097 | 406 | /** |
nkeynes@1097 | 407 | * Find the track containing the sector specified by LBA. |
nkeynes@1097 | 408 | * Note: this function does not check for media change. |
nkeynes@1097 | 409 | * @return The track, or NULL if no track contains the sector. |
nkeynes@1097 | 410 | */ |
nkeynes@1097 | 411 | cdrom_track_t cdrom_disc_get_track_by_lba( cdrom_disc_t disc, cdrom_lba_t lba ) |
nkeynes@1097 | 412 | { |
nkeynes@1097 | 413 | if( disc->track_count == 0 || disc->track[0].lba > lba || lba >= disc->leadout ) |
nkeynes@1097 | 414 | return NULL; /* LBA outside disc bounds */ |
nkeynes@1097 | 415 | |
nkeynes@1097 | 416 | for( unsigned i=1; i< disc->track_count; i++ ) { |
nkeynes@1097 | 417 | if( lba < disc->track[i].lba ) |
nkeynes@1097 | 418 | return &disc->track[i-1]; |
nkeynes@1097 | 419 | } |
nkeynes@1097 | 420 | return &disc->track[disc->track_count-1]; |
nkeynes@1097 | 421 | } |
nkeynes@1097 | 422 | |
nkeynes@1097 | 423 | cdrom_error_t cdrom_disc_read_sectors( cdrom_disc_t disc, cdrom_lba_t lba, cdrom_count_t count, |
nkeynes@1097 | 424 | cdrom_read_mode_t mode, unsigned char *buf, size_t *length ) |
nkeynes@1097 | 425 | { |
nkeynes@1097 | 426 | return disc->source.read_sectors( &disc->source, lba, count, mode, buf, length ); |
nkeynes@1097 | 427 | } |
nkeynes@1097 | 428 | |
nkeynes@1097 | 429 | /** |
nkeynes@1097 | 430 | * Check if the disc contains valid media. |
nkeynes@1097 | 431 | * @return CDROM_ERROR_OK if disc is present, otherwise CDROM_ERROR_NODISC |
nkeynes@1097 | 432 | */ |
nkeynes@1097 | 433 | cdrom_error_t cdrom_disc_check_media( cdrom_disc_t disc ) |
nkeynes@1097 | 434 | { |
nkeynes@1097 | 435 | if( disc == NULL ) |
nkeynes@1097 | 436 | return CDROM_ERROR_NODISC; |
nkeynes@1097 | 437 | if( disc->check_media != NULL ) |
nkeynes@1097 | 438 | disc->check_media(disc); |
nkeynes@1097 | 439 | return disc->disc_type == CDROM_DISC_NONE ? CDROM_ERROR_NODISC : CDROM_ERROR_OK; |
nkeynes@1097 | 440 | } |
nkeynes@1097 | 441 | |
nkeynes@1097 | 442 | void cdrom_disc_print_toc( FILE *f, cdrom_disc_t disc ) |
nkeynes@1097 | 443 | { |
nkeynes@1097 | 444 | int i; |
nkeynes@1097 | 445 | int session = 0; |
nkeynes@1097 | 446 | |
nkeynes@1097 | 447 | if( disc == NULL || disc->track_count == 0 ) { |
nkeynes@1097 | 448 | fprintf( f, "No disc\n" ); |
nkeynes@1097 | 449 | return; |
nkeynes@1097 | 450 | } |
nkeynes@1097 | 451 | for( i=0; i<disc->track_count; i++ ) { |
nkeynes@1097 | 452 | cdrom_track_t track = &disc->track[i]; |
nkeynes@1097 | 453 | if( track->sessionno != session ) { |
nkeynes@1097 | 454 | session = disc->track[i].sessionno; |
nkeynes@1097 | 455 | fprintf( f, "Session %d:\n", session ); |
nkeynes@1097 | 456 | } |
nkeynes@1097 | 457 | fprintf( f, " %02d. %6d %02x\n", track->trackno, track->lba, track->flags ); |
nkeynes@1097 | 458 | } |
nkeynes@1097 | 459 | } |
nkeynes@1097 | 460 | |
nkeynes@1097 | 461 | void cdrom_disc_dump_toc( cdrom_disc_t disc ) |
nkeynes@1097 | 462 | { |
nkeynes@1097 | 463 | cdrom_disc_print_toc( stderr, disc ); |
nkeynes@1097 | 464 | } |
.