| 1 | /* grabbag - Convenience lib for various routines common to several tools |
| 2 | * Copyright (C) 2002-2009 Josh Coalson |
| 3 | * Copyright (C) 2011-2016 Xiph.Org Foundation |
| 4 | * |
| 5 | * This library is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU Lesser General Public |
| 7 | * License as published by the Free Software Foundation; either |
| 8 | * version 2.1 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 | * Lesser General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU Lesser General Public |
| 16 | * License along with this library; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | */ |
| 19 | |
| 20 | #ifdef HAVE_CONFIG_H |
| 21 | # include <config.h> |
| 22 | #endif |
| 23 | |
| 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <string.h> |
| 27 | #include "FLAC/assert.h" |
| 28 | #include "share/compat.h" |
| 29 | #include "share/grabbag.h" |
| 30 | #include "share/safe_str.h" |
| 31 | |
| 32 | unsigned grabbag__cuesheet_msf_to_frame(unsigned minutes, unsigned seconds, unsigned frames) |
| 33 | { |
| 34 | return ((minutes * 60) + seconds) * 75 + frames; |
| 35 | } |
| 36 | |
| 37 | void grabbag__cuesheet_frame_to_msf(unsigned frame, unsigned *minutes, unsigned *seconds, unsigned *frames) |
| 38 | { |
| 39 | *frames = frame % 75; |
| 40 | frame /= 75; |
| 41 | *seconds = frame % 60; |
| 42 | frame /= 60; |
| 43 | *minutes = frame; |
| 44 | } |
| 45 | |
| 46 | /* since we only care about values >= 0 or error, returns < 0 for any illegal string, else value */ |
| 47 | static int local__parse_int_(const char *s) |
| 48 | { |
| 49 | int ret = 0; |
| 50 | char c; |
| 51 | |
| 52 | if(*s == '\0') |
| 53 | return -1; |
| 54 | |
| 55 | while('\0' != (c = *s++)) |
| 56 | if(c >= '0' && c <= '9') |
| 57 | ret = ret * 10 + (c - '0'); |
| 58 | else |
| 59 | return -1; |
| 60 | |
| 61 | return ret; |
| 62 | } |
| 63 | |
| 64 | /* since we only care about values >= 0 or error, returns < 0 for any illegal string, else value */ |
| 65 | static FLAC__int64 local__parse_int64_(const char *s) |
| 66 | { |
| 67 | FLAC__int64 ret = 0; |
| 68 | char c; |
| 69 | |
| 70 | if(*s == '\0') |
| 71 | return -1; |
| 72 | |
| 73 | while('\0' != (c = *s++)) |
| 74 | if(c >= '0' && c <= '9') |
| 75 | ret = ret * 10 + (c - '0'); |
| 76 | else |
| 77 | return -1; |
| 78 | |
| 79 | return ret; |
| 80 | } |
| 81 | |
| 82 | /* accept minute:second:frame syntax of '[0-9]+:[0-9][0-9]?:[0-9][0-9]?', but max second of 59 and max frame of 74, e.g. 0:0:0, 123:45:67 |
| 83 | * return sample number or <0 for error |
| 84 | * WATCHOUT: if sample rate is not evenly divisible by 75, the resulting sample number will be approximate |
| 85 | */ |
| 86 | static FLAC__int64 local__parse_msf_(const char *s, unsigned sample_rate) |
| 87 | { |
| 88 | FLAC__int64 ret, field; |
| 89 | char c; |
| 90 | |
| 91 | c = *s++; |
| 92 | if(c >= '0' && c <= '9') |
| 93 | field = (c - '0'); |
| 94 | else |
| 95 | return -1; |
| 96 | while(':' != (c = *s++)) { |
| 97 | if(c >= '0' && c <= '9') |
| 98 | field = field * 10 + (c - '0'); |
| 99 | else |
| 100 | return -1; |
| 101 | } |
| 102 | |
| 103 | ret = field * 60 * sample_rate; |
| 104 | |
| 105 | c = *s++; |
| 106 | if(c >= '0' && c <= '9') |
| 107 | field = (c - '0'); |
| 108 | else |
| 109 | return -1; |
| 110 | if(':' != (c = *s++)) { |
| 111 | if(c >= '0' && c <= '9') { |
| 112 | field = field * 10 + (c - '0'); |
| 113 | c = *s++; |
| 114 | if(c != ':') |
| 115 | return -1; |
| 116 | } |
| 117 | else |
| 118 | return -1; |
| 119 | } |
| 120 | |
| 121 | if(field >= 60) |
| 122 | return -1; |
| 123 | |
| 124 | ret += field * sample_rate; |
| 125 | |
| 126 | c = *s++; |
| 127 | if(c >= '0' && c <= '9') |
| 128 | field = (c - '0'); |
| 129 | else |
| 130 | return -1; |
| 131 | if('\0' != (c = *s++)) { |
| 132 | if(c >= '0' && c <= '9') { |
| 133 | field = field * 10 + (c - '0'); |
| 134 | c = *s++; |
| 135 | } |
| 136 | else |
| 137 | return -1; |
| 138 | } |
| 139 | |
| 140 | if(c != '\0') |
| 141 | return -1; |
| 142 | |
| 143 | if(field >= 75) |
| 144 | return -1; |
| 145 | |
| 146 | ret += field * (sample_rate / 75); |
| 147 | |
| 148 | return ret; |
| 149 | } |
| 150 | |
| 151 | /* accept minute:second syntax of '[0-9]+:[0-9][0-9]?{,.[0-9]+}', but second < 60, e.g. 0:0.0, 3:5, 15:31.731 |
| 152 | * return sample number or <0 for error |
| 153 | * WATCHOUT: depending on the sample rate, the resulting sample number may be approximate with fractional seconds |
| 154 | */ |
| 155 | static FLAC__int64 local__parse_ms_(const char *s, unsigned sample_rate) |
| 156 | { |
| 157 | FLAC__int64 ret, field; |
| 158 | double x; |
| 159 | char c, *end; |
| 160 | |
| 161 | c = *s++; |
| 162 | if(c >= '0' && c <= '9') |
| 163 | field = (c - '0'); |
| 164 | else |
| 165 | return -1; |
| 166 | while(':' != (c = *s++)) { |
| 167 | if(c >= '0' && c <= '9') |
| 168 | field = field * 10 + (c - '0'); |
| 169 | else |
| 170 | return -1; |
| 171 | } |
| 172 | |
| 173 | ret = field * 60 * sample_rate; |
| 174 | |
| 175 | s++; /* skip the ':' */ |
| 176 | if(strspn(s, "0123456789.") != strlen(s)) |
| 177 | return -1; |
| 178 | x = strtod(s, &end); |
| 179 | if(*end || end == s) |
| 180 | return -1; |
| 181 | if(x < 0.0 || x >= 60.0) |
| 182 | return -1; |
| 183 | |
| 184 | ret += (FLAC__int64)(x * sample_rate); |
| 185 | |
| 186 | return ret; |
| 187 | } |
| 188 | |
| 189 | static char *local__get_field_(char **s, FLAC__bool allow_quotes) |
| 190 | { |
| 191 | FLAC__bool has_quote = false; |
| 192 | char *p; |
| 193 | |
| 194 | FLAC__ASSERT(0 != s); |
| 195 | |
| 196 | if(0 == *s) |
| 197 | return 0; |
| 198 | |
| 199 | /* skip leading whitespace */ |
| 200 | while(**s && 0 != strchr(" \t\r\n", **s)) |
| 201 | (*s)++; |
| 202 | |
| 203 | if(**s == 0) { |
| 204 | *s = 0; |
| 205 | return 0; |
| 206 | } |
| 207 | |
| 208 | if(allow_quotes && (**s == '"')) { |
| 209 | has_quote = true; |
| 210 | (*s)++; |
| 211 | if(**s == 0) { |
| 212 | *s = 0; |
| 213 | return 0; |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | p = *s; |
| 218 | |
| 219 | if(has_quote) { |
| 220 | *s = strchr(*s, '\"'); |
| 221 | /* if there is no matching end quote, it's an error */ |
| 222 | if(0 == *s) |
| 223 | p = *s = 0; |
| 224 | else { |
| 225 | **s = '\0'; |
| 226 | (*s)++; |
| 227 | } |
| 228 | } |
| 229 | else { |
| 230 | while(**s && 0 == strchr(" \t\r\n", **s)) |
| 231 | (*s)++; |
| 232 | if(**s) { |
| 233 | **s = '\0'; |
| 234 | (*s)++; |
| 235 | } |
| 236 | else |
| 237 | *s = 0; |
| 238 | } |
| 239 | |
| 240 | return p; |
| 241 | } |
| 242 | |
| 243 | static FLAC__bool local__cuesheet_parse_(FILE *file, const char **error_message, unsigned *last_line_read, FLAC__StreamMetadata *cuesheet, unsigned sample_rate, FLAC__bool is_cdda, FLAC__uint64 lead_out_offset) |
| 244 | { |
| 245 | char buffer[4096], *line, *field; |
| 246 | unsigned forced_leadout_track_num = 0; |
| 247 | FLAC__uint64 forced_leadout_track_offset = 0; |
| 248 | int in_track_num = -1, in_index_num = -1; |
| 249 | FLAC__bool disc_has_catalog = false, track_has_flags = false, track_has_isrc = false, has_forced_leadout = false; |
| 250 | FLAC__StreamMetadata_CueSheet *cs = &cuesheet->data.cue_sheet; |
| 251 | |
| 252 | FLAC__ASSERT(!is_cdda || sample_rate == 44100); |
| 253 | /* double protection */ |
| 254 | if(is_cdda && sample_rate != 44100) { |
| 255 | *error_message = "CD-DA cuesheet only allowed with 44.1kHz sample rate"; |
| 256 | return false; |
| 257 | } |
| 258 | |
| 259 | cs->lead_in = is_cdda? 2 * 44100 /* The default lead-in size for CD-DA */ : 0; |
| 260 | cs->is_cd = is_cdda; |
| 261 | |
| 262 | while(0 != fgets(buffer, sizeof(buffer), file)) { |
| 263 | (*last_line_read)++; |
| 264 | line = buffer; |
| 265 | |
| 266 | { |
| 267 | size_t linelen = strlen(line); |
| 268 | if((linelen == sizeof(buffer)-1) && line[linelen-1] != '\n') { |
| 269 | *error_message = "line too long"; |
| 270 | return false; |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | if(0 != (field = local__get_field_(&line, /*allow_quotes=*/false))) { |
| 275 | if(0 == FLAC__STRCASECMP(field, "CATALOG")) { |
| 276 | if(disc_has_catalog) { |
| 277 | *error_message = "found multiple CATALOG commands"; |
| 278 | return false; |
| 279 | } |
| 280 | if(0 == (field = local__get_field_(&line, /*allow_quotes=*/true))) { |
| 281 | *error_message = "CATALOG is missing catalog number"; |
| 282 | return false; |
| 283 | } |
| 284 | if(strlen(field) >= sizeof(cs->media_catalog_number)) { |
| 285 | *error_message = "CATALOG number is too long"; |
| 286 | return false; |
| 287 | } |
| 288 | if(is_cdda && (strlen(field) != 13 || strspn(field, "0123456789") != 13)) { |
| 289 | *error_message = "CD-DA CATALOG number must be 13 decimal digits"; |
| 290 | return false; |
| 291 | } |
| 292 | safe_strncpy(cs->media_catalog_number, field, sizeof(cs->media_catalog_number)); |
| 293 | disc_has_catalog = true; |
| 294 | } |
| 295 | else if(0 == FLAC__STRCASECMP(field, "FLAGS")) { |
| 296 | if(track_has_flags) { |
| 297 | *error_message = "found multiple FLAGS commands"; |
| 298 | return false; |
| 299 | } |
| 300 | if(in_track_num < 0 || in_index_num >= 0) { |
| 301 | *error_message = "FLAGS command must come after TRACK but before INDEX"; |
| 302 | return false; |
| 303 | } |
| 304 | while(0 != (field = local__get_field_(&line, /*allow_quotes=*/false))) { |
| 305 | if(0 == FLAC__STRCASECMP(field, "PRE")) |
| 306 | cs->tracks[cs->num_tracks-1].pre_emphasis = 1; |
| 307 | } |
| 308 | track_has_flags = true; |
| 309 | } |
| 310 | else if(0 == FLAC__STRCASECMP(field, "INDEX")) { |
| 311 | FLAC__int64 xx; |
| 312 | FLAC__StreamMetadata_CueSheet_Track *track = &cs->tracks[cs->num_tracks-1]; |
| 313 | if(in_track_num < 0) { |
| 314 | *error_message = "found INDEX before any TRACK"; |
| 315 | return false; |
| 316 | } |
| 317 | if(0 == (field = local__get_field_(&line, /*allow_quotes=*/false))) { |
| 318 | *error_message = "INDEX is missing index number"; |
| 319 | return false; |
| 320 | } |
| 321 | in_index_num = local__parse_int_(field); |
| 322 | if(in_index_num < 0) { |
| 323 | *error_message = "INDEX has invalid index number"; |
| 324 | return false; |
| 325 | } |
| 326 | FLAC__ASSERT(cs->num_tracks > 0); |
| 327 | if(track->num_indices == 0) { |
| 328 | /* it's the first index point of the track */ |
| 329 | if(in_index_num > 1) { |
| 330 | *error_message = "first INDEX number of a TRACK must be 0 or 1"; |
| 331 | return false; |
| 332 | } |
| 333 | } |
| 334 | else { |
| 335 | if(in_index_num != track->indices[track->num_indices-1].number + 1) { |
| 336 | *error_message = "INDEX numbers must be sequential"; |
| 337 | return false; |
| 338 | } |
| 339 | } |
| 340 | if(is_cdda && in_index_num > 99) { |
| 341 | *error_message = "CD-DA INDEX number must be between 0 and 99, inclusive"; |
| 342 | return false; |
| 343 | } |
| 344 | /*@@@ search for duplicate track number? */ |
| 345 | if(0 == (field = local__get_field_(&line, /*allow_quotes=*/false))) { |
| 346 | *error_message = "INDEX is missing an offset after the index number"; |
| 347 | return false; |
| 348 | } |
| 349 | /* first parse as minute:second:frame format */ |
| 350 | xx = local__parse_msf_(field, sample_rate); |
| 351 | if(xx < 0) { |
| 352 | /* CD-DA must use only MM:SS:FF format */ |
| 353 | if(is_cdda) { |
| 354 | *error_message = "illegal INDEX offset (not of the form MM:SS:FF)"; |
| 355 | return false; |
| 356 | } |
| 357 | /* as an extension for non-CD-DA we allow MM:SS.SS or raw sample number */ |
| 358 | xx = local__parse_ms_(field, sample_rate); |
| 359 | if(xx < 0) { |
| 360 | xx = local__parse_int64_(field); |
| 361 | if(xx < 0) { |
| 362 | *error_message = "illegal INDEX offset"; |
| 363 | return false; |
| 364 | } |
| 365 | } |
| 366 | } |
| 367 | else if(sample_rate % 75 && xx) { |
| 368 | /* only sample zero is exact */ |
| 369 | *error_message = "illegal INDEX offset (MM:SS:FF form not allowed if sample rate is not a multiple of 75)"; |
| 370 | return false; |
| 371 | } |
| 372 | if(is_cdda && cs->num_tracks == 1 && cs->tracks[0].num_indices == 0 && xx != 0) { |
| 373 | *error_message = "first INDEX of first TRACK must have an offset of 00:00:00"; |
| 374 | return false; |
| 375 | } |
| 376 | if(is_cdda && track->num_indices > 0 && (FLAC__uint64)xx <= track->indices[track->num_indices-1].offset) { |
| 377 | *error_message = "CD-DA INDEX offsets must increase in time"; |
| 378 | return false; |
| 379 | } |
| 380 | /* fill in track offset if it's the first index of the track */ |
| 381 | if(track->num_indices == 0) |
| 382 | track->offset = (FLAC__uint64)xx; |
| 383 | if(is_cdda && cs->num_tracks > 1) { |
| 384 | const FLAC__StreamMetadata_CueSheet_Track *prev = &cs->tracks[cs->num_tracks-2]; |
| 385 | if((FLAC__uint64)xx <= prev->offset + prev->indices[prev->num_indices-1].offset) { |
| 386 | *error_message = "CD-DA INDEX offsets must increase in time"; |
| 387 | return false; |
| 388 | } |
| 389 | } |
| 390 | if(!FLAC__metadata_object_cuesheet_track_insert_blank_index(cuesheet, cs->num_tracks-1, track->num_indices)) { |
| 391 | *error_message = "memory allocation error"; |
| 392 | return false; |
| 393 | } |
| 394 | track->indices[track->num_indices-1].offset = (FLAC__uint64)xx - track->offset; |
| 395 | track->indices[track->num_indices-1].number = in_index_num; |
| 396 | } |
| 397 | else if(0 == FLAC__STRCASECMP(field, "ISRC")) { |
| 398 | char *l, *r; |
| 399 | if(track_has_isrc) { |
| 400 | *error_message = "found multiple ISRC commands"; |
| 401 | return false; |
| 402 | } |
| 403 | if(in_track_num < 0 || in_index_num >= 0) { |
| 404 | *error_message = "ISRC command must come after TRACK but before INDEX"; |
| 405 | return false; |
| 406 | } |
| 407 | if(0 == (field = local__get_field_(&line, /*allow_quotes=*/true))) { |
| 408 | *error_message = "ISRC is missing ISRC number"; |
| 409 | return false; |
| 410 | } |
| 411 | /* strip out dashes */ |
| 412 | for(l = r = field; *r; r++) { |
| 413 | if(*r != '-') |
| 414 | *l++ = *r; |
| 415 | } |
| 416 | *l = '\0'; |
| 417 | if(strlen(field) != 12 || strspn(field, "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789") < 5 || strspn(field+5, "1234567890") != 7) { |
| 418 | *error_message = "invalid ISRC number"; |
| 419 | return false; |
| 420 | } |
| 421 | safe_strncpy(cs->tracks[cs->num_tracks-1].isrc, field, sizeof(cs->tracks[cs->num_tracks-1].isrc)); |
| 422 | track_has_isrc = true; |
| 423 | } |
| 424 | else if(0 == FLAC__STRCASECMP(field, "TRACK")) { |
| 425 | if(cs->num_tracks > 0) { |
| 426 | const FLAC__StreamMetadata_CueSheet_Track *prev = &cs->tracks[cs->num_tracks-1]; |
| 427 | if( |
| 428 | prev->num_indices == 0 || |
| 429 | ( |
| 430 | is_cdda && |
| 431 | ( |
| 432 | (prev->num_indices == 1 && prev->indices[0].number != 1) || |
| 433 | (prev->num_indices == 2 && prev->indices[0].number != 1 && prev->indices[1].number != 1) |
| 434 | ) |
| 435 | ) |
| 436 | ) { |
| 437 | *error_message = is_cdda? |
| 438 | "previous TRACK must specify at least one INDEX 01" : |
| 439 | "previous TRACK must specify at least one INDEX"; |
| 440 | return false; |
| 441 | } |
| 442 | } |
| 443 | if(0 == (field = local__get_field_(&line, /*allow_quotes=*/false))) { |
| 444 | *error_message = "TRACK is missing track number"; |
| 445 | return false; |
| 446 | } |
| 447 | in_track_num = local__parse_int_(field); |
| 448 | if(in_track_num < 0) { |
| 449 | *error_message = "TRACK has invalid track number"; |
| 450 | return false; |
| 451 | } |
| 452 | if(in_track_num == 0) { |
| 453 | *error_message = "TRACK number must be greater than 0"; |
| 454 | return false; |
| 455 | } |
| 456 | if(is_cdda) { |
| 457 | if(in_track_num > 99) { |
| 458 | *error_message = "CD-DA TRACK number must be between 1 and 99, inclusive"; |
| 459 | return false; |
| 460 | } |
| 461 | } |
| 462 | else { |
| 463 | if(in_track_num == 255) { |
| 464 | *error_message = "TRACK number 255 is reserved for the lead-out"; |
| 465 | return false; |
| 466 | } |
| 467 | else if(in_track_num > 255) { |
| 468 | *error_message = "TRACK number must be between 1 and 254, inclusive"; |
| 469 | return false; |
| 470 | } |
| 471 | } |
| 472 | if(is_cdda && cs->num_tracks > 0 && in_track_num != cs->tracks[cs->num_tracks-1].number + 1) { |
| 473 | *error_message = "CD-DA TRACK numbers must be sequential"; |
| 474 | return false; |
| 475 | } |
| 476 | /*@@@ search for duplicate track number? */ |
| 477 | if(0 == (field = local__get_field_(&line, /*allow_quotes=*/false))) { |
| 478 | *error_message = "TRACK is missing a track type after the track number"; |
| 479 | return false; |
| 480 | } |
| 481 | if(!FLAC__metadata_object_cuesheet_insert_blank_track(cuesheet, cs->num_tracks)) { |
| 482 | *error_message = "memory allocation error"; |
| 483 | return false; |
| 484 | } |
| 485 | cs->tracks[cs->num_tracks-1].number = in_track_num; |
| 486 | cs->tracks[cs->num_tracks-1].type = (0 == FLAC__STRCASECMP(field, "AUDIO"))? 0 : 1; /*@@@ should we be more strict with the value here? */ |
| 487 | in_index_num = -1; |
| 488 | track_has_flags = false; |
| 489 | track_has_isrc = false; |
| 490 | } |
| 491 | else if(0 == FLAC__STRCASECMP(field, "REM")) { |
| 492 | if(0 != (field = local__get_field_(&line, /*allow_quotes=*/false))) { |
| 493 | if(0 == strcmp(field, "FLAC__lead-in")) { |
| 494 | FLAC__int64 xx; |
| 495 | if(0 == (field = local__get_field_(&line, /*allow_quotes=*/false))) { |
| 496 | *error_message = "FLAC__lead-in is missing offset"; |
| 497 | return false; |
| 498 | } |
| 499 | xx = local__parse_int64_(field); |
| 500 | if(xx < 0) { |
| 501 | *error_message = "illegal FLAC__lead-in offset"; |
| 502 | return false; |
| 503 | } |
| 504 | if(is_cdda && xx % 588 != 0) { |
| 505 | *error_message = "illegal CD-DA FLAC__lead-in offset, must be even multiple of 588 samples"; |
| 506 | return false; |
| 507 | } |
| 508 | cs->lead_in = (FLAC__uint64)xx; |
| 509 | } |
| 510 | else if(0 == strcmp(field, "FLAC__lead-out")) { |
| 511 | int track_num; |
| 512 | FLAC__int64 offset; |
| 513 | if(has_forced_leadout) { |
| 514 | *error_message = "multiple FLAC__lead-out commands"; |
| 515 | return false; |
| 516 | } |
| 517 | if(0 == (field = local__get_field_(&line, /*allow_quotes=*/false))) { |
| 518 | *error_message = "FLAC__lead-out is missing track number"; |
| 519 | return false; |
| 520 | } |
| 521 | track_num = local__parse_int_(field); |
| 522 | if(track_num < 0) { |
| 523 | *error_message = "illegal FLAC__lead-out track number"; |
| 524 | return false; |
| 525 | } |
| 526 | forced_leadout_track_num = (unsigned)track_num; |
| 527 | /*@@@ search for duplicate track number? */ |
| 528 | if(0 == (field = local__get_field_(&line, /*allow_quotes=*/false))) { |
| 529 | *error_message = "FLAC__lead-out is missing offset"; |
| 530 | return false; |
| 531 | } |
| 532 | offset = local__parse_int64_(field); |
| 533 | if(offset < 0) { |
| 534 | *error_message = "illegal FLAC__lead-out offset"; |
| 535 | return false; |
| 536 | } |
| 537 | forced_leadout_track_offset = (FLAC__uint64)offset; |
| 538 | if(forced_leadout_track_offset != lead_out_offset) { |
| 539 | *error_message = "FLAC__lead-out offset does not match end-of-stream offset"; |
| 540 | return false; |
| 541 | } |
| 542 | has_forced_leadout = true; |
| 543 | } |
| 544 | } |
| 545 | } |
| 546 | } |
| 547 | } |
| 548 | |
| 549 | if(cs->num_tracks == 0) { |
| 550 | *error_message = "there must be at least one TRACK command"; |
| 551 | return false; |
| 552 | } |
| 553 | else { |
| 554 | const FLAC__StreamMetadata_CueSheet_Track *prev = &cs->tracks[cs->num_tracks-1]; |
| 555 | if( |
| 556 | prev->num_indices == 0 || |
| 557 | ( |
| 558 | is_cdda && |
| 559 | ( |
| 560 | (prev->num_indices == 1 && prev->indices[0].number != 1) || |
| 561 | (prev->num_indices == 2 && prev->indices[0].number != 1 && prev->indices[1].number != 1) |
| 562 | ) |
| 563 | ) |
| 564 | ) { |
| 565 | *error_message = is_cdda? |
| 566 | "previous TRACK must specify at least one INDEX 01" : |
| 567 | "previous TRACK must specify at least one INDEX"; |
| 568 | return false; |
| 569 | } |
| 570 | } |
| 571 | |
| 572 | if(!has_forced_leadout) { |
| 573 | forced_leadout_track_num = is_cdda? 170 : 255; |
| 574 | forced_leadout_track_offset = lead_out_offset; |
| 575 | } |
| 576 | if(!FLAC__metadata_object_cuesheet_insert_blank_track(cuesheet, cs->num_tracks)) { |
| 577 | *error_message = "memory allocation error"; |
| 578 | return false; |
| 579 | } |
| 580 | cs->tracks[cs->num_tracks-1].number = forced_leadout_track_num; |
| 581 | cs->tracks[cs->num_tracks-1].offset = forced_leadout_track_offset; |
| 582 | |
| 583 | if(!feof(file)) { |
| 584 | *error_message = "read error"; |
| 585 | return false; |
| 586 | } |
| 587 | return true; |
| 588 | } |
| 589 | |
| 590 | FLAC__StreamMetadata *grabbag__cuesheet_parse(FILE *file, const char **error_message, unsigned *last_line_read, unsigned sample_rate, FLAC__bool is_cdda, FLAC__uint64 lead_out_offset) |
| 591 | { |
| 592 | FLAC__StreamMetadata *cuesheet; |
| 593 | |
| 594 | FLAC__ASSERT(0 != file); |
| 595 | FLAC__ASSERT(0 != error_message); |
| 596 | FLAC__ASSERT(0 != last_line_read); |
| 597 | |
| 598 | *last_line_read = 0; |
| 599 | cuesheet = FLAC__metadata_object_new(FLAC__METADATA_TYPE_CUESHEET); |
| 600 | |
| 601 | if(0 == cuesheet) { |
| 602 | *error_message = "memory allocation error"; |
| 603 | return 0; |
| 604 | } |
| 605 | |
| 606 | if(!local__cuesheet_parse_(file, error_message, last_line_read, cuesheet, sample_rate, is_cdda, lead_out_offset)) { |
| 607 | FLAC__metadata_object_delete(cuesheet); |
| 608 | return 0; |
| 609 | } |
| 610 | |
| 611 | return cuesheet; |
| 612 | } |
| 613 | |
| 614 | void grabbag__cuesheet_emit(FILE *file, const FLAC__StreamMetadata *cuesheet, const char *file_reference) |
| 615 | { |
| 616 | const FLAC__StreamMetadata_CueSheet *cs; |
| 617 | unsigned track_num, index_num; |
| 618 | |
| 619 | FLAC__ASSERT(0 != file); |
| 620 | FLAC__ASSERT(0 != cuesheet); |
| 621 | FLAC__ASSERT(cuesheet->type == FLAC__METADATA_TYPE_CUESHEET); |
| 622 | |
| 623 | cs = &cuesheet->data.cue_sheet; |
| 624 | |
| 625 | if(*(cs->media_catalog_number)) |
| 626 | fprintf(file, "CATALOG %s\n", cs->media_catalog_number); |
| 627 | fprintf(file, "FILE %s\n", file_reference); |
| 628 | |
| 629 | for(track_num = 0; track_num < cs->num_tracks-1; track_num++) { |
| 630 | const FLAC__StreamMetadata_CueSheet_Track *track = cs->tracks + track_num; |
| 631 | |
| 632 | fprintf(file, " TRACK %02u %s\n", (unsigned)track->number, track->type == 0? "AUDIO" : "DATA"); |
| 633 | |
| 634 | if(track->pre_emphasis) |
| 635 | fprintf(file, " FLAGS PRE\n"); |
| 636 | if(*(track->isrc)) |
| 637 | fprintf(file, " ISRC %s\n", track->isrc); |
| 638 | |
| 639 | for(index_num = 0; index_num < track->num_indices; index_num++) { |
| 640 | const FLAC__StreamMetadata_CueSheet_Index *indx = track->indices + index_num; |
| 641 | |
| 642 | fprintf(file, " INDEX %02u ", (unsigned)indx->number); |
| 643 | if(cs->is_cd) { |
| 644 | const unsigned logical_frame = (unsigned)((track->offset + indx->offset) / (44100 / 75)); |
| 645 | unsigned m, s, f; |
| 646 | grabbag__cuesheet_frame_to_msf(logical_frame, &m, &s, &f); |
| 647 | fprintf(file, "%02u:%02u:%02u\n", m, s, f); |
| 648 | } |
| 649 | else |
| 650 | fprintf(file, "%" PRIu64 "\n", (track->offset + indx->offset)); |
| 651 | } |
| 652 | } |
| 653 | |
| 654 | fprintf(file, "REM FLAC__lead-in %" PRIu64 "\n", cs->lead_in); |
| 655 | fprintf(file, "REM FLAC__lead-out %u %" PRIu64 "\n", (unsigned)cs->tracks[track_num].number, cs->tracks[track_num].offset); |
| 656 | } |