Josh Coalson | cae5873 | 2002-05-04 17:30:32 +0000 | [diff] [blame^] | 1 | /* libFLAC - Free Lossless Audio Codec library |
| 2 | * Copyright (C) 2001,2002 Josh Coalson |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Library General Public |
| 6 | * License as published by the Free Software Foundation; either |
| 7 | * version 2 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * This library is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Library General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Library General Public |
| 15 | * License along with this library; if not, write to the |
| 16 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 17 | * Boston, MA 02111-1307, USA. |
| 18 | */ |
| 19 | |
| 20 | #include <errno.h> |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <string.h> |
| 24 | |
| 25 | #if defined _MSC_VER || defined __MINGW32__ |
| 26 | #include <sys/utime.h> /* for utime() */ |
| 27 | #include <io.h> /* for chmod() */ |
| 28 | #else |
| 29 | #include <sys/types.h> /* some flavors of BSD (like OS X) require this to get time_t */ |
| 30 | #include <utime.h> /* for utime() */ |
| 31 | #include <unistd.h> /* for chown(), unlink() */ |
| 32 | #endif |
| 33 | #include <sys/stat.h> /* for stat(), maybe chmod() */ |
| 34 | |
| 35 | #include "FLAC/assert.h" |
| 36 | #include "FLAC/metadata.h" |
| 37 | #include "FLAC/file_decoder.h" |
| 38 | |
| 39 | #ifdef max |
| 40 | #undef max |
| 41 | #endif |
| 42 | #define max(a,b) ((a)>(b)?(a):(b)) |
| 43 | #ifdef min |
| 44 | #undef min |
| 45 | #endif |
| 46 | #define min(a,b) ((a)<(b)?(a):(b)) |
| 47 | |
| 48 | |
| 49 | /**************************************************************************** |
| 50 | * |
| 51 | * Local function declarations |
| 52 | * |
| 53 | ***************************************************************************/ |
| 54 | |
| 55 | /* this one should probably not go in the public interface: */ |
| 56 | static void FLAC__metadata_object_delete_data_(FLAC__StreamMetaData *object); |
| 57 | |
| 58 | static void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes); |
| 59 | static void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes); |
| 60 | static void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes); |
| 61 | static FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes); |
| 62 | static FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes); |
| 63 | static FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes); |
| 64 | |
| 65 | static FLAC__bool read_metadata_block_header_(FLAC__MetaData_SimpleIterator *iterator); |
| 66 | static FLAC__bool read_metadata_block_data_(FLAC__MetaData_SimpleIterator *iterator, FLAC__StreamMetaData *block); |
| 67 | static FLAC__MetaData_SimpleIteratorStatus read_metadata_block_data_streaminfo_(FILE *file, FLAC__StreamMetaData_StreamInfo *block); |
| 68 | static FLAC__MetaData_SimpleIteratorStatus read_metadata_block_data_padding_(FILE *file, FLAC__StreamMetaData_Padding *block, unsigned block_length); |
| 69 | static FLAC__MetaData_SimpleIteratorStatus read_metadata_block_data_application_(FILE *file, FLAC__StreamMetaData_Application *block, unsigned block_length); |
| 70 | static FLAC__MetaData_SimpleIteratorStatus read_metadata_block_data_seektable_(FILE *file, FLAC__StreamMetaData_SeekTable *block, unsigned block_length); |
| 71 | static FLAC__MetaData_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_(FILE *file, FLAC__StreamMetaData_VorbisComment_Entry *entry); |
| 72 | static FLAC__MetaData_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_(FILE *file, FLAC__StreamMetaData_VorbisComment *block); |
| 73 | |
| 74 | static FLAC__bool write_metadata_block_header_(FILE *file, FLAC__MetaData_SimpleIteratorStatus *status, const FLAC__StreamMetaData *block); |
| 75 | static FLAC__bool write_metadata_block_data_(FILE *file, FLAC__MetaData_SimpleIteratorStatus *status, const FLAC__StreamMetaData *block); |
| 76 | static FLAC__MetaData_SimpleIteratorStatus write_metadata_block_data_streaminfo_(FILE *file, const FLAC__StreamMetaData_StreamInfo *block); |
| 77 | static FLAC__MetaData_SimpleIteratorStatus write_metadata_block_data_padding_(FILE *file, const FLAC__StreamMetaData_Padding *block, unsigned block_length); |
| 78 | static FLAC__MetaData_SimpleIteratorStatus write_metadata_block_data_application_(FILE *file, const FLAC__StreamMetaData_Application *block, unsigned block_length); |
| 79 | static FLAC__MetaData_SimpleIteratorStatus write_metadata_block_data_seektable_(FILE *file, const FLAC__StreamMetaData_SeekTable *block); |
| 80 | static FLAC__MetaData_SimpleIteratorStatus write_metadata_block_data_vorbis_comment_(FILE *file, const FLAC__StreamMetaData_VorbisComment *block); |
| 81 | static FLAC__bool write_metadata_block_stationary_(FLAC__MetaData_SimpleIterator *iterator, const FLAC__StreamMetaData *block); |
| 82 | static FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__MetaData_SimpleIterator *iterator, FLAC__StreamMetaData *block, unsigned padding_length, FLAC__bool padding_is_last); |
| 83 | static FLAC__bool rewrite_whole_file_(FLAC__MetaData_SimpleIterator *iterator, FLAC__StreamMetaData *block, FLAC__bool append); |
| 84 | |
| 85 | static FLAC__bool chain_rewrite_chain_(FLAC__MetaData_Chain *chain); |
| 86 | static FLAC__bool chain_rewrite_file_(FLAC__MetaData_Chain *chain, const char *tempfile_path_prefix); |
| 87 | |
| 88 | static void simple_iterator_push_(FLAC__MetaData_SimpleIterator *iterator); |
| 89 | static FLAC__bool simple_iterator_pop_(FLAC__MetaData_SimpleIterator *iterator); |
| 90 | |
| 91 | /* return 0 if OK, 1 if read error, 2 if not a FLAC file */ |
| 92 | static unsigned seek_to_first_metadata_block_(FILE *f); |
| 93 | |
| 94 | static FLAC__bool simple_iterator_copy_file_prefix_(FLAC__MetaData_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append); |
| 95 | static FLAC__bool simple_iterator_copy_file_postfix_(FLAC__MetaData_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, long fixup_is_last_flag_offset, FLAC__bool backup); |
| 96 | |
| 97 | static FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, unsigned bytes/*@@@ 4G limit*/, FLAC__MetaData_SimpleIteratorStatus *status); |
| 98 | static FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__MetaData_SimpleIteratorStatus *status); |
| 99 | |
| 100 | static FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__MetaData_SimpleIteratorStatus *status); |
| 101 | static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__MetaData_SimpleIteratorStatus *status); |
| 102 | static void cleanup_tempfile_(FILE **tempfile, char **tempfilename); |
| 103 | |
| 104 | static FLAC__bool get_file_stats_(const char *filename, struct stat *stats); |
| 105 | static void set_file_stats_(const char *filename, struct stat *stats); |
| 106 | |
| 107 | static FLAC__MetaData_ChainStatus get_equivalent_status_(FLAC__MetaData_SimpleIteratorStatus status); |
| 108 | |
| 109 | |
| 110 | /**************************************************************************** |
| 111 | * |
| 112 | * Level 0 implementation |
| 113 | * |
| 114 | ***************************************************************************/ |
| 115 | |
| 116 | static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 *buffer[], void *client_data); |
| 117 | static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data); |
| 118 | static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data); |
| 119 | |
| 120 | FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetaData_StreamInfo *streaminfo) |
| 121 | { |
| 122 | FLAC__FileDecoder *decoder = FLAC__file_decoder_new(); |
| 123 | |
| 124 | if(0 == decoder) |
| 125 | return false; |
| 126 | |
| 127 | FLAC__file_decoder_set_md5_checking(decoder, false); |
| 128 | FLAC__file_decoder_set_filename(decoder, filename); |
| 129 | FLAC__file_decoder_set_write_callback(decoder, write_callback_); |
| 130 | FLAC__file_decoder_set_metadata_callback(decoder, metadata_callback_); |
| 131 | FLAC__file_decoder_set_error_callback(decoder, error_callback_); |
| 132 | FLAC__file_decoder_set_client_data(decoder, &streaminfo); |
| 133 | |
| 134 | if(FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK) |
| 135 | return false; |
| 136 | |
| 137 | if(!FLAC__file_decoder_process_metadata(decoder)) |
| 138 | return false; |
| 139 | |
| 140 | if(FLAC__file_decoder_get_state(decoder) != FLAC__FILE_DECODER_UNINITIALIZED) |
| 141 | FLAC__file_decoder_finish(decoder); |
| 142 | |
| 143 | FLAC__file_decoder_delete(decoder); |
| 144 | |
| 145 | return 0 != streaminfo; /* the metadata_callback_() will set streaminfo to 0 on an error */ |
| 146 | } |
| 147 | |
| 148 | FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 *buffer[], void *client_data) |
| 149 | { |
| 150 | (void)decoder, (void)frame, (void)buffer, (void)client_data; |
| 151 | |
| 152 | return FLAC__STREAM_DECODER_WRITE_CONTINUE; |
| 153 | } |
| 154 | |
| 155 | void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data) |
| 156 | { |
| 157 | FLAC__StreamMetaData_StreamInfo **streaminfo = (FLAC__StreamMetaData_StreamInfo **)client_data; |
| 158 | (void)decoder; |
| 159 | |
| 160 | if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO && 0 != *streaminfo) |
| 161 | **streaminfo = metadata->data.stream_info; |
| 162 | } |
| 163 | |
| 164 | void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data) |
| 165 | { |
| 166 | FLAC__StreamMetaData_StreamInfo **streaminfo = (FLAC__StreamMetaData_StreamInfo **)client_data; |
| 167 | (void)decoder; |
| 168 | |
| 169 | if(status != FLAC__STREAM_DECODER_ERROR_LOST_SYNC) |
| 170 | *streaminfo = 0; |
| 171 | } |
| 172 | |
| 173 | |
| 174 | /**************************************************************************** |
| 175 | * |
| 176 | * Level 1 implementation |
| 177 | * |
| 178 | ***************************************************************************/ |
| 179 | |
| 180 | #define SIMPLE_ITERATOR_MAX_PUSH_DEPTH (1+4) |
| 181 | /* 1 for initial offset, +4 for our own personal use */ |
| 182 | |
| 183 | struct FLAC__MetaData_SimpleIterator { |
| 184 | FILE *file; |
| 185 | char *filename, *tempfile_path_prefix; |
| 186 | struct stat stats; |
| 187 | FLAC__bool has_stats; |
| 188 | FLAC__bool is_writable; |
| 189 | FLAC__MetaData_SimpleIteratorStatus status; |
| 190 | /*@@@ 2G limits here because of the offset type: */ |
| 191 | long offset[SIMPLE_ITERATOR_MAX_PUSH_DEPTH]; |
| 192 | long first_offset; /* this is the offset to the STREAMINFO block */ |
| 193 | unsigned depth; |
| 194 | /* this is the metadata block header of the current block we are pointing to: */ |
| 195 | FLAC__bool is_last; |
| 196 | FLAC__MetaDataType type; |
| 197 | unsigned length; |
| 198 | }; |
| 199 | |
| 200 | const char *FLAC__MetaData_SimpleIteratorStatusString[] = { |
| 201 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK", |
| 202 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT", |
| 203 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE", |
| 204 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE", |
| 205 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE", |
| 206 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR", |
| 207 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR", |
| 208 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR", |
| 209 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR", |
| 210 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR", |
| 211 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR", |
| 212 | "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR" |
| 213 | }; |
| 214 | |
| 215 | |
| 216 | FLAC__MetaData_SimpleIterator *FLAC__metadata_simple_iterator_new() |
| 217 | { |
| 218 | FLAC__MetaData_SimpleIterator *iterator = malloc(sizeof(FLAC__MetaData_SimpleIterator)); |
| 219 | |
| 220 | if(0 != iterator) { |
| 221 | iterator->file = 0; |
| 222 | iterator->filename = 0; |
| 223 | iterator->tempfile_path_prefix = 0; |
| 224 | iterator->has_stats = false; |
| 225 | iterator->is_writable = false; |
| 226 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 227 | iterator->first_offset = iterator->offset[0] = -1; |
| 228 | iterator->depth = 0; |
| 229 | } |
| 230 | |
| 231 | return iterator; |
| 232 | } |
| 233 | |
| 234 | static void simple_iterator_free_guts_(FLAC__MetaData_SimpleIterator *iterator) |
| 235 | { |
| 236 | FLAC__ASSERT(0 != iterator); |
| 237 | |
| 238 | if(0 != iterator->file) { |
| 239 | fclose(iterator->file); |
| 240 | iterator->file = 0; |
| 241 | if(iterator->has_stats) |
| 242 | set_file_stats_(iterator->filename, &iterator->stats); |
| 243 | } |
| 244 | if(0 != iterator->filename) { |
| 245 | free(iterator->filename); |
| 246 | iterator->filename = 0; |
| 247 | } |
| 248 | if(0 != iterator->tempfile_path_prefix) { |
| 249 | free(iterator->tempfile_path_prefix); |
| 250 | iterator->tempfile_path_prefix = 0; |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | void FLAC__metadata_simple_iterator_delete(FLAC__MetaData_SimpleIterator *iterator) |
| 255 | { |
| 256 | FLAC__ASSERT(0 != iterator); |
| 257 | |
| 258 | simple_iterator_free_guts_(iterator); |
| 259 | free(iterator); |
| 260 | } |
| 261 | |
| 262 | FLAC__MetaData_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__MetaData_SimpleIterator *iterator) |
| 263 | { |
| 264 | FLAC__MetaData_SimpleIteratorStatus status; |
| 265 | |
| 266 | FLAC__ASSERT(0 != iterator); |
| 267 | |
| 268 | status = iterator->status; |
| 269 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 270 | return status; |
| 271 | } |
| 272 | |
| 273 | static FLAC__bool simple_iterator_prime_input_(FLAC__MetaData_SimpleIterator *iterator) |
| 274 | { |
| 275 | unsigned ret; |
| 276 | |
| 277 | FLAC__ASSERT(0 != iterator); |
| 278 | |
| 279 | iterator->is_writable = false; |
| 280 | |
| 281 | if(0 == (iterator->file = fopen(iterator->filename, "r+b"))) { |
| 282 | if(errno == EACCES) { |
| 283 | if(0 == (iterator->file = fopen(iterator->filename, "rb"))) { |
| 284 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE; |
| 285 | return false; |
| 286 | } |
| 287 | } |
| 288 | else { |
| 289 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE; |
| 290 | return false; |
| 291 | } |
| 292 | } |
| 293 | else { |
| 294 | iterator->is_writable = true; |
| 295 | } |
| 296 | |
| 297 | ret = seek_to_first_metadata_block_(iterator->file); |
| 298 | switch(ret) { |
| 299 | case 0: |
| 300 | iterator->depth = 0; |
| 301 | iterator->first_offset = iterator->offset[iterator->depth] = ftell(iterator->file); |
| 302 | return read_metadata_block_header_(iterator); |
| 303 | case 1: |
| 304 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 305 | return false; |
| 306 | case 2: |
| 307 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE; |
| 308 | return false; |
| 309 | default: |
| 310 | FLAC__ASSERT(0); |
| 311 | return false; |
| 312 | } |
| 313 | } |
| 314 | |
| 315 | #if 0 |
| 316 | @@@ If we decide to finish implementing this, put this comment back in metadata.h |
| 317 | /* |
| 318 | * The 'tempfile_path_prefix' allows you to specify a directory where |
| 319 | * tempfiles should go. Remember that if your metadata edits cause the |
| 320 | * FLAC file to grow, the entire file will have to be rewritten. If |
| 321 | * 'tempfile_path_prefix' is NULL, the temp file will be written in the |
| 322 | * same directory as the original FLAC file. This makes replacing the |
| 323 | * original with the tempfile fast but requires extra space in the same |
| 324 | * partition for the tempfile. If space is a problem, you can pass a |
| 325 | * directory name belonging to a different partition in |
| 326 | * 'tempfile_path_prefix'. Note that you should use the forward slash |
| 327 | * '/' as the directory separator. A trailing slash is not needed; it |
| 328 | * will be added automatically. |
| 329 | */ |
| 330 | FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__MetaData_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats, const char *tempfile_path_prefix); |
| 331 | #endif |
| 332 | |
| 333 | FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__MetaData_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats) |
| 334 | { |
| 335 | const char *tempfile_path_prefix = 0; /*@@@ search for comments near 'rename(' for what it will take to finish implementing this */ |
| 336 | |
| 337 | FLAC__ASSERT(0 != iterator); |
| 338 | FLAC__ASSERT(0 != filename); |
| 339 | |
| 340 | simple_iterator_free_guts_(iterator); |
| 341 | |
| 342 | if(preserve_file_stats) |
| 343 | iterator->has_stats = get_file_stats_(filename, &iterator->stats); |
| 344 | |
| 345 | if(0 == (iterator->filename = strdup(filename))) { |
| 346 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 347 | return false; |
| 348 | } |
| 349 | if(0 != tempfile_path_prefix && 0 == (iterator->tempfile_path_prefix = strdup(tempfile_path_prefix))) { |
| 350 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 351 | return false; |
| 352 | } |
| 353 | |
| 354 | return simple_iterator_prime_input_(iterator); |
| 355 | } |
| 356 | |
| 357 | FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__MetaData_SimpleIterator *iterator) |
| 358 | { |
| 359 | FLAC__ASSERT(0 != iterator); |
| 360 | FLAC__ASSERT(0 != iterator->file); |
| 361 | |
| 362 | return iterator->is_writable; |
| 363 | } |
| 364 | |
| 365 | FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__MetaData_SimpleIterator *iterator) |
| 366 | { |
| 367 | FLAC__ASSERT(0 != iterator); |
| 368 | FLAC__ASSERT(0 != iterator->file); |
| 369 | |
| 370 | if(iterator->is_last) |
| 371 | return false; |
| 372 | |
| 373 | if(0 != fseek(iterator->file, iterator->length, SEEK_CUR)) { |
| 374 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 375 | return false; |
| 376 | } |
| 377 | |
| 378 | iterator->offset[iterator->depth] = ftell(iterator->file); |
| 379 | |
| 380 | return read_metadata_block_header_(iterator); |
| 381 | } |
| 382 | |
| 383 | FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__MetaData_SimpleIterator *iterator) |
| 384 | { |
| 385 | long this_offset; |
| 386 | |
| 387 | FLAC__ASSERT(0 != iterator); |
| 388 | FLAC__ASSERT(0 != iterator->file); |
| 389 | |
| 390 | if(iterator->offset[iterator->depth] == iterator->first_offset) |
| 391 | return false; |
| 392 | |
| 393 | if(0 != fseek(iterator->file, iterator->first_offset, SEEK_SET)) { |
| 394 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 395 | return false; |
| 396 | } |
| 397 | this_offset = iterator->first_offset; |
| 398 | if(!read_metadata_block_header_(iterator)) |
| 399 | return false; |
| 400 | |
| 401 | /* we ignore any error from ftell() and catch it in fseek() */ |
| 402 | while(ftell(iterator->file) + (long)iterator->length < iterator->offset[iterator->depth]) { |
| 403 | if(0 != fseek(iterator->file, iterator->length, SEEK_CUR)) { |
| 404 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 405 | return false; |
| 406 | } |
| 407 | this_offset = ftell(iterator->file); |
| 408 | if(!read_metadata_block_header_(iterator)) |
| 409 | return false; |
| 410 | } |
| 411 | |
| 412 | iterator->offset[iterator->depth] = this_offset; |
| 413 | |
| 414 | return true; |
| 415 | } |
| 416 | |
| 417 | FLAC__MetaDataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__MetaData_SimpleIterator *iterator) |
| 418 | { |
| 419 | FLAC__ASSERT(0 != iterator); |
| 420 | FLAC__ASSERT(0 != iterator->file); |
| 421 | |
| 422 | return iterator->type; |
| 423 | } |
| 424 | |
| 425 | FLAC__StreamMetaData *FLAC__metadata_simple_iterator_get_block(FLAC__MetaData_SimpleIterator *iterator) |
| 426 | { |
| 427 | FLAC__StreamMetaData *block = FLAC__metadata_object_new(iterator->type); |
| 428 | |
| 429 | FLAC__ASSERT(0 != iterator); |
| 430 | FLAC__ASSERT(0 != iterator->file); |
| 431 | |
| 432 | if(0 != block) { |
| 433 | block->is_last = iterator->is_last; |
| 434 | block->length = iterator->length; |
| 435 | |
| 436 | if(!read_metadata_block_data_(iterator, block)) { |
| 437 | FLAC__metadata_object_delete(block); |
| 438 | return 0; |
| 439 | } |
| 440 | |
| 441 | /* back up to the beginning of the block data to stay consistent */ |
| 442 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth] + 4, SEEK_SET)) { /*@@@ 4 = MAGIC NUMBER for metadata block header bytes */ |
| 443 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 444 | FLAC__metadata_object_delete(block); |
| 445 | return 0; |
| 446 | } |
| 447 | } |
| 448 | else |
| 449 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 450 | |
| 451 | return block; |
| 452 | } |
| 453 | |
| 454 | FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__MetaData_SimpleIterator *iterator, FLAC__StreamMetaData *block, FLAC__bool use_padding) |
| 455 | { |
| 456 | FLAC__ASSERT(0 != iterator); |
| 457 | FLAC__ASSERT(0 != iterator->file); |
| 458 | |
| 459 | if(!iterator->is_writable) { |
| 460 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE; |
| 461 | return false; |
| 462 | } |
| 463 | |
| 464 | if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO || block->type == FLAC__METADATA_TYPE_STREAMINFO) { |
| 465 | if(iterator->type != block->type) { |
| 466 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT; |
| 467 | return false; |
| 468 | } |
| 469 | } |
| 470 | |
| 471 | block->is_last = iterator->is_last; |
| 472 | //@@@@FLAC__metadata_object_calculate_length(block); |
| 473 | |
| 474 | if(iterator->length == block->length) |
| 475 | return write_metadata_block_stationary_(iterator, block); |
| 476 | else if(iterator->length > block->length) { |
| 477 | if(use_padding && iterator->length >= 4 + block->length) /*@@@ 4 = MAGIC NUMBER for metadata block header bytes */ |
| 478 | return write_metadata_block_stationary_with_padding_(iterator, block, iterator->length - block->length - 4, block->is_last); |
| 479 | else |
| 480 | return rewrite_whole_file_(iterator, block, /*append=*/false); |
| 481 | } |
| 482 | else /* iterator->length < block->length */ { |
| 483 | unsigned padding_leftover = 0; |
| 484 | FLAC__bool padding_is_last = false; |
| 485 | if(use_padding) { |
| 486 | /* first see if we can even use padding */ |
| 487 | if(iterator->is_last) { |
| 488 | use_padding = false; |
| 489 | } |
| 490 | else { |
| 491 | unsigned existing_block_length = iterator->length; |
| 492 | simple_iterator_push_(iterator); |
| 493 | if(!FLAC__metadata_simple_iterator_next(iterator)) { |
| 494 | (void)simple_iterator_pop_(iterator); |
| 495 | return false; |
| 496 | } |
| 497 | if(iterator->type != FLAC__METADATA_TYPE_PADDING) { |
| 498 | use_padding = false; |
| 499 | } |
| 500 | else { |
| 501 | /*@@@ MAGIC NUMBER 4 = metadata block header length, appears 3 times here: */ |
| 502 | const unsigned available_size = existing_block_length + 4 + iterator->length; |
| 503 | if(available_size == block->length) { |
| 504 | padding_leftover = 0; |
| 505 | block->is_last = iterator->is_last; |
| 506 | } |
| 507 | else if(available_size - 4 < block->length) |
| 508 | use_padding = false; |
| 509 | else { |
| 510 | padding_leftover = available_size - 4 - block->length; |
| 511 | padding_is_last = iterator->is_last; |
| 512 | block->is_last = false; |
| 513 | } |
| 514 | } |
| 515 | if(!simple_iterator_pop_(iterator)) |
| 516 | return false; |
| 517 | } |
| 518 | } |
| 519 | if(use_padding) { |
| 520 | if(padding_leftover == 0) |
| 521 | return write_metadata_block_stationary_(iterator, block); |
| 522 | else |
| 523 | return write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover, padding_is_last); |
| 524 | } |
| 525 | else { |
| 526 | return rewrite_whole_file_(iterator, block, /*append=*/false); |
| 527 | } |
| 528 | } |
| 529 | } |
| 530 | |
| 531 | FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__MetaData_SimpleIterator *iterator, FLAC__StreamMetaData *block, FLAC__bool use_padding) |
| 532 | { |
| 533 | unsigned padding_leftover = 0; |
| 534 | FLAC__bool padding_is_last = false; |
| 535 | |
| 536 | FLAC__ASSERT(0 != iterator); |
| 537 | FLAC__ASSERT(0 != iterator->file); |
| 538 | |
| 539 | if(!iterator->is_writable) |
| 540 | return false; |
| 541 | |
| 542 | if(block->type == FLAC__METADATA_TYPE_STREAMINFO) { |
| 543 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT; |
| 544 | return false; |
| 545 | } |
| 546 | |
| 547 | if(use_padding) { |
| 548 | /* first see if we can even use padding */ |
| 549 | if(iterator->is_last) { |
| 550 | use_padding = false; |
| 551 | } |
| 552 | else { |
| 553 | simple_iterator_push_(iterator); |
| 554 | if(!FLAC__metadata_simple_iterator_next(iterator)) { |
| 555 | (void)simple_iterator_pop_(iterator); |
| 556 | return false; |
| 557 | } |
| 558 | if(iterator->type != FLAC__METADATA_TYPE_PADDING) { |
| 559 | use_padding = false; |
| 560 | } |
| 561 | else { |
| 562 | /*@@@ MAGIC NUMBER 4 = metadata block header length, appears 2 times here: */ |
| 563 | if(iterator->length == block->length) { |
| 564 | padding_leftover = 0; |
| 565 | block->is_last = iterator->is_last; |
| 566 | } |
| 567 | else if(iterator->length < 4 + block->length) |
| 568 | use_padding = false; |
| 569 | else { |
| 570 | padding_leftover = iterator->length - 4 - block->length; |
| 571 | padding_is_last = iterator->is_last; |
| 572 | block->is_last = false; |
| 573 | } |
| 574 | } |
| 575 | if(!simple_iterator_pop_(iterator)) |
| 576 | return false; |
| 577 | } |
| 578 | } |
| 579 | if(use_padding) { |
| 580 | /* move to the next block, which is suitable padding */ |
| 581 | if(!FLAC__metadata_simple_iterator_next(iterator)) |
| 582 | return false; |
| 583 | if(padding_leftover == 0) |
| 584 | return write_metadata_block_stationary_(iterator, block); |
| 585 | else |
| 586 | return write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover, padding_is_last); |
| 587 | } |
| 588 | else { |
| 589 | return rewrite_whole_file_(iterator, block, /*append=*/true); |
| 590 | } |
| 591 | } |
| 592 | |
| 593 | /* |
| 594 | * Deletes the block at the current position. This will cause the |
| 595 | * entire FLAC file to be rewritten, unless 'use_padding' is true, |
| 596 | * in which case the block will be replaced by an equal-sized PADDING |
| 597 | * block. |
| 598 | * |
| 599 | * You may not delete the STREAMINFO block |
| 600 | */ |
| 601 | FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__MetaData_SimpleIterator *iterator, FLAC__bool use_padding) |
| 602 | { |
| 603 | if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO) { |
| 604 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT; |
| 605 | return false; |
| 606 | } |
| 607 | |
| 608 | if(use_padding) { |
| 609 | FLAC__StreamMetaData *padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING); |
| 610 | if(0 == padding) { |
| 611 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 612 | return false; |
| 613 | } |
| 614 | padding->length = iterator->length; |
| 615 | if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false)) { |
| 616 | FLAC__metadata_object_delete(padding); |
| 617 | return false; |
| 618 | } |
| 619 | FLAC__metadata_object_delete(padding); |
| 620 | return true; |
| 621 | } |
| 622 | else { |
| 623 | return rewrite_whole_file_(iterator, 0, /*append=*/false); |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | |
| 628 | |
| 629 | /**************************************************************************** |
| 630 | * |
| 631 | * Level 2 implementation |
| 632 | * |
| 633 | ***************************************************************************/ |
| 634 | |
| 635 | |
| 636 | typedef struct FLAC__MetaData_Node { |
| 637 | FLAC__StreamMetaData *data; |
| 638 | struct FLAC__MetaData_Node *prev, *next; |
| 639 | } FLAC__MetaData_Node; |
| 640 | |
| 641 | struct FLAC__MetaData_Chain { |
| 642 | char *filename; |
| 643 | FLAC__MetaData_Node *head; |
| 644 | FLAC__MetaData_Node *tail; |
| 645 | unsigned nodes; |
| 646 | FLAC__MetaData_ChainStatus status; |
| 647 | long first_offset, last_offset; /*@@@ 2G limit */ |
| 648 | /* |
| 649 | * This is the length of the chain initially read from the FLAC file. |
| 650 | * it is used to compare against the current_length to decide whether |
| 651 | * or not the whole file has to be rewritten. |
| 652 | */ |
| 653 | unsigned initial_length; /*@@@ 4G limit */ |
| 654 | unsigned current_length; /*@@@ 4G limit */ |
| 655 | }; |
| 656 | |
| 657 | struct FLAC__MetaData_Iterator { |
| 658 | FLAC__MetaData_Chain *chain; |
| 659 | FLAC__MetaData_Node *current; |
| 660 | }; |
| 661 | |
| 662 | const char *FLAC__MetaData_ChainStatusString[] = { |
| 663 | "FLAC__METADATA_CHAIN_STATUS_OK", |
| 664 | "FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT", |
| 665 | "FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE", |
| 666 | "FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE", |
| 667 | "FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE", |
| 668 | "FLAC__METADATA_CHAIN_STATUS_READ_ERROR", |
| 669 | "FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR", |
| 670 | "FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR", |
| 671 | "FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR", |
| 672 | "FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR", |
| 673 | "FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR", |
| 674 | "FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR" |
| 675 | }; |
| 676 | |
| 677 | |
| 678 | static FLAC__MetaData_Node *node_new_() |
| 679 | { |
| 680 | FLAC__MetaData_Node *node = (FLAC__MetaData_Node*)malloc(sizeof(FLAC__MetaData_Node)); |
| 681 | if(0 != node) |
| 682 | memset(node, 0, sizeof(FLAC__MetaData_Node)); |
| 683 | return node; |
| 684 | } |
| 685 | |
| 686 | static void node_delete_(FLAC__MetaData_Node *node) |
| 687 | { |
| 688 | FLAC__ASSERT(0 != node); |
| 689 | if(0 != node->data) |
| 690 | FLAC__metadata_object_delete(node->data); |
| 691 | free(node); |
| 692 | } |
| 693 | |
| 694 | static void chain_append_node_(FLAC__MetaData_Chain *chain, FLAC__MetaData_Node *node) |
| 695 | { |
| 696 | FLAC__ASSERT(0 != chain); |
| 697 | FLAC__ASSERT(0 != node); |
| 698 | |
| 699 | node->data->is_last = true; |
| 700 | if(0 != chain->tail) |
| 701 | chain->tail->data->is_last = false; |
| 702 | |
| 703 | if(0 == chain->head) |
| 704 | chain->head = node; |
| 705 | else { |
| 706 | chain->tail->next = node; |
| 707 | node->prev = chain->tail; |
| 708 | } |
| 709 | chain->tail = node; |
| 710 | chain->nodes++; |
| 711 | chain->current_length += (4 + node->data->length); /*@@@ MAGIC NUMBER 4 = metadata block header bytes */ |
| 712 | } |
| 713 | |
| 714 | static void chain_remove_node_(FLAC__MetaData_Chain *chain, FLAC__MetaData_Node *node) |
| 715 | { |
| 716 | FLAC__ASSERT(0 != chain); |
| 717 | FLAC__ASSERT(0 != node); |
| 718 | |
| 719 | if(node == chain->head) |
| 720 | chain->head = node->next; |
| 721 | else |
| 722 | node->prev->next = node->next; |
| 723 | |
| 724 | if(node == chain->tail) |
| 725 | chain->tail = node->prev; |
| 726 | else |
| 727 | node->next->prev = node->prev; |
| 728 | |
| 729 | chain->nodes--; |
| 730 | chain->current_length -= (4 + node->data->length); /*@@@ MAGIC NUMBER 4 = metadata block header bytes */ |
| 731 | } |
| 732 | |
| 733 | static void chain_delete_node_(FLAC__MetaData_Chain *chain, FLAC__MetaData_Node *node) |
| 734 | { |
| 735 | chain_remove_node_(chain, node); |
| 736 | node_delete_(node); |
| 737 | } |
| 738 | |
| 739 | static void iterator_insert_node_(FLAC__MetaData_Iterator *iterator, FLAC__MetaData_Node *node) |
| 740 | { |
| 741 | FLAC__ASSERT(0 != node); |
| 742 | FLAC__ASSERT(0 != iterator); |
| 743 | FLAC__ASSERT(0 != iterator->current); |
| 744 | FLAC__ASSERT(0 != iterator->chain); |
| 745 | FLAC__ASSERT(0 != iterator->chain->head); |
| 746 | FLAC__ASSERT(0 != iterator->chain->tail); |
| 747 | |
| 748 | node->prev = iterator->current->prev; |
| 749 | if(0 == node->prev) |
| 750 | iterator->chain->head = node; |
| 751 | else |
| 752 | node->prev->next = node; |
| 753 | |
| 754 | node->next = iterator->current; |
| 755 | iterator->current->prev = node; |
| 756 | |
| 757 | iterator->chain->nodes++; |
| 758 | iterator->chain->current_length += (4 + node->data->length); /*@@@ MAGIC NUMBER 4 = metadata block header bytes */ |
| 759 | } |
| 760 | |
| 761 | static void iterator_insert_node_after_(FLAC__MetaData_Iterator *iterator, FLAC__MetaData_Node *node) |
| 762 | { |
| 763 | FLAC__ASSERT(0 != node); |
| 764 | FLAC__ASSERT(0 != iterator); |
| 765 | FLAC__ASSERT(0 != iterator->current); |
| 766 | FLAC__ASSERT(0 != iterator->chain); |
| 767 | FLAC__ASSERT(0 != iterator->chain->head); |
| 768 | FLAC__ASSERT(0 != iterator->chain->tail); |
| 769 | |
| 770 | iterator->current->data->is_last = false; |
| 771 | |
| 772 | node->prev = iterator->current; |
| 773 | iterator->current->next = node; |
| 774 | |
| 775 | node->next = iterator->current->next; |
| 776 | if(0 == node->next) |
| 777 | iterator->chain->tail = node; |
| 778 | else |
| 779 | node->next->prev = node; |
| 780 | |
| 781 | iterator->chain->tail->data->is_last = true; |
| 782 | |
| 783 | iterator->chain->nodes++; |
| 784 | iterator->chain->current_length += (4 + node->data->length); /*@@@ MAGIC NUMBER 4 = metadata block header bytes */ |
| 785 | } |
| 786 | |
| 787 | FLAC__MetaData_Chain *FLAC__metadata_chain_new() |
| 788 | { |
| 789 | FLAC__MetaData_Chain *chain = malloc(sizeof(FLAC__MetaData_Chain)); |
| 790 | |
| 791 | if(0 != chain) { |
| 792 | chain->filename = 0; |
| 793 | chain->head = chain->tail = 0; |
| 794 | chain->nodes = 0; |
| 795 | chain->status = FLAC__METADATA_CHAIN_STATUS_OK; |
| 796 | chain->initial_length = chain->current_length = 0; |
| 797 | } |
| 798 | |
| 799 | return chain; |
| 800 | } |
| 801 | |
| 802 | void FLAC__metadata_chain_delete(FLAC__MetaData_Chain *chain) |
| 803 | { |
| 804 | FLAC__MetaData_Node *node, *next; |
| 805 | |
| 806 | FLAC__ASSERT(0 != chain); |
| 807 | |
| 808 | for(node = chain->head; node; ) { |
| 809 | next = node->next; |
| 810 | node_delete_(node); |
| 811 | node = next; |
| 812 | } |
| 813 | |
| 814 | if(0 != chain->filename) |
| 815 | free(chain->filename); |
| 816 | |
| 817 | free(chain); |
| 818 | } |
| 819 | |
| 820 | FLAC__MetaData_ChainStatus FLAC__metadata_chain_status(FLAC__MetaData_Chain *chain) |
| 821 | { |
| 822 | FLAC__MetaData_ChainStatus status; |
| 823 | |
| 824 | FLAC__ASSERT(0 != chain); |
| 825 | |
| 826 | status = chain->status; |
| 827 | chain->status = FLAC__METADATA_CHAIN_STATUS_OK; |
| 828 | return status; |
| 829 | } |
| 830 | |
| 831 | FLAC__bool FLAC__metadata_chain_read(FLAC__MetaData_Chain *chain, const char *filename) |
| 832 | { |
| 833 | FLAC__MetaData_SimpleIterator *iterator; |
| 834 | FLAC__MetaData_Node *node; |
| 835 | |
| 836 | FLAC__ASSERT(0 != chain); |
| 837 | FLAC__ASSERT(0 != filename); |
| 838 | |
| 839 | if(0 == (chain->filename = strdup(filename))) { |
| 840 | chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 841 | return false; |
| 842 | } |
| 843 | |
| 844 | if(0 == (iterator = FLAC__metadata_simple_iterator_new())) { |
| 845 | chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 846 | return false; |
| 847 | } |
| 848 | |
| 849 | if(!FLAC__metadata_simple_iterator_init(iterator, filename, /*preserve_file_stats=*/false)) { |
| 850 | chain->status = get_equivalent_status_(iterator->status); |
| 851 | return false; |
| 852 | } |
| 853 | |
| 854 | do { |
| 855 | node = node_new_(); |
| 856 | if(0 == node) { |
| 857 | chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 858 | return false; |
| 859 | } |
| 860 | node->data = FLAC__metadata_simple_iterator_get_block(iterator); |
| 861 | if(0 == node->data) { |
| 862 | node_delete_(node); |
| 863 | chain->status = get_equivalent_status_(iterator->status); |
| 864 | return false; |
| 865 | } |
| 866 | chain_append_node_(chain, node); |
| 867 | } while(FLAC__metadata_simple_iterator_next(iterator)); |
| 868 | |
| 869 | if(!iterator->is_last || iterator->status != FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK) { |
| 870 | chain->status = get_equivalent_status_(iterator->status); |
| 871 | return false; |
| 872 | } |
| 873 | |
| 874 | chain->last_offset = ftell(iterator->file); |
| 875 | FLAC__metadata_simple_iterator_delete(iterator); |
| 876 | |
| 877 | chain->initial_length = chain->current_length; |
| 878 | return true; |
| 879 | } |
| 880 | |
| 881 | /* |
| 882 | * Write all metadata out to the FLAC file. This function tries to be as |
| 883 | * efficient as possible; how the metadata is actually written is shown by |
| 884 | * the following: |
| 885 | * |
| 886 | * If the current chain is the same size as the existing metadata, the new |
| 887 | * data is written in place. |
| 888 | * |
| 889 | * If the current chain is longer than the existing metadata, the entire |
| 890 | * FLAC file must be rewritten. |
| 891 | * |
| 892 | * If the current chain is shorted than the existing metadata, and |
| 893 | * use_padding is true, a PADDING block is added to the end of the new |
| 894 | * data to make it the same size as the existing data (if possible, see |
| 895 | * the note to FLAC__metadata_simple_iterator_set_block() about the four |
| 896 | * byte limit) and the new data is written in place. If use_padding is |
| 897 | * false, the entire FLAC file is rewritten. |
| 898 | */ |
| 899 | FLAC__bool FLAC__metadata_chain_write(FLAC__MetaData_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats) |
| 900 | { |
| 901 | struct stat stats; |
| 902 | const char *tempfile_path_prefix = 0; |
| 903 | |
| 904 | if(use_padding && chain->current_length + 4 <= chain->initial_length) { |
| 905 | FLAC__StreamMetaData *padding; |
| 906 | FLAC__MetaData_Node *node; |
| 907 | if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) { |
| 908 | chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 909 | return false; |
| 910 | } |
| 911 | padding->length = chain->initial_length - (4 + chain->current_length); |
| 912 | if(0 == (node = node_new_())) { |
| 913 | FLAC__metadata_object_delete(padding); |
| 914 | chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 915 | return false; |
| 916 | } |
| 917 | node->data = padding; |
| 918 | chain_append_node_(chain, node); |
| 919 | } |
| 920 | |
| 921 | if(preserve_file_stats) |
| 922 | get_file_stats_(chain->filename, &stats); |
| 923 | |
| 924 | if(chain->current_length == chain->initial_length) { |
| 925 | if(!chain_rewrite_chain_(chain)) |
| 926 | return false; |
| 927 | } |
| 928 | else { |
| 929 | if(!chain_rewrite_file_(chain, tempfile_path_prefix)) |
| 930 | return false; |
| 931 | } |
| 932 | |
| 933 | if(preserve_file_stats) |
| 934 | set_file_stats_(chain->filename, &stats); |
| 935 | |
| 936 | chain->initial_length = chain->current_length; |
| 937 | return true; |
| 938 | } |
| 939 | |
| 940 | void FLAC__metadata_chain_merge_padding(FLAC__MetaData_Chain *chain) |
| 941 | { |
| 942 | FLAC__MetaData_Node *node; |
| 943 | |
| 944 | FLAC__ASSERT(0 != chain); |
| 945 | |
| 946 | for(node = chain->head; node; ) { |
| 947 | if(node->data->type == FLAC__METADATA_TYPE_PADDING && 0 != node->next && node->next->data->type == FLAC__METADATA_TYPE_PADDING) { |
| 948 | node->data->length += (4 + node->next->data->length); /*@@@ MAGIC NUMBER 4 = metadata data block header bytes */ |
| 949 | chain_delete_node_(chain, node->next); |
| 950 | } |
| 951 | else { |
| 952 | node = node->next; |
| 953 | } |
| 954 | } |
| 955 | if(0 != chain->tail) |
| 956 | chain->tail->data->is_last = true; |
| 957 | } |
| 958 | |
| 959 | void FLAC__metadata_chain_sort_padding(FLAC__MetaData_Chain *chain) |
| 960 | { |
| 961 | FLAC__MetaData_Node *node, *save; |
| 962 | unsigned i; |
| 963 | |
| 964 | FLAC__ASSERT(0 != chain); |
| 965 | |
| 966 | /* |
| 967 | * Don't try and be too smart... this simple algo is good enough for |
| 968 | * the small number of nodes that we deal with. |
| 969 | */ |
| 970 | for(i = 0, node = chain->head; i < chain->nodes; i++) { |
| 971 | node->data->is_last = false; /* we'll fix at the end */ |
| 972 | if(node->data->type == FLAC__METADATA_TYPE_PADDING) { |
| 973 | save = node->next; |
| 974 | chain_remove_node_(chain, node); |
| 975 | chain_append_node_(chain, node); |
| 976 | node = save; |
| 977 | } |
| 978 | else { |
| 979 | node = node->next; |
| 980 | } |
| 981 | } |
| 982 | if(0 != chain->tail) |
| 983 | chain->tail->data->is_last = true; |
| 984 | |
| 985 | FLAC__metadata_chain_merge_padding(chain); |
| 986 | } |
| 987 | |
| 988 | |
| 989 | FLAC__MetaData_Iterator *FLAC__metadata_iterator_new() |
| 990 | { |
| 991 | FLAC__MetaData_Iterator *iterator = malloc(sizeof(FLAC__MetaData_Iterator)); |
| 992 | |
| 993 | if(0 != iterator) { |
| 994 | iterator->current = 0; |
| 995 | iterator->chain = 0; |
| 996 | } |
| 997 | |
| 998 | return iterator; |
| 999 | } |
| 1000 | |
| 1001 | void FLAC__metadata_iterator_delete(FLAC__MetaData_Iterator *iterator) |
| 1002 | { |
| 1003 | FLAC__ASSERT(0 != iterator); |
| 1004 | |
| 1005 | free(iterator); |
| 1006 | } |
| 1007 | |
| 1008 | /* |
| 1009 | * Initialize the iterator to point to the first metadata block in the |
| 1010 | * given chain. |
| 1011 | */ |
| 1012 | void FLAC__metadata_iterator_init(FLAC__MetaData_Iterator *iterator, FLAC__MetaData_Chain *chain) |
| 1013 | { |
| 1014 | FLAC__ASSERT(0 != iterator); |
| 1015 | FLAC__ASSERT(0 != chain); |
| 1016 | FLAC__ASSERT(0 != chain->head); |
| 1017 | |
| 1018 | iterator->chain = chain; |
| 1019 | iterator->current = chain->head; |
| 1020 | } |
| 1021 | |
| 1022 | FLAC__bool FLAC__metadata_iterator_next(FLAC__MetaData_Iterator *iterator) |
| 1023 | { |
| 1024 | FLAC__ASSERT(0 != iterator); |
| 1025 | |
| 1026 | if(0 == iterator->current || 0 == iterator->current->next) |
| 1027 | return false; |
| 1028 | |
| 1029 | iterator->current = iterator->current->next; |
| 1030 | return true; |
| 1031 | } |
| 1032 | |
| 1033 | FLAC__bool FLAC__metadata_iterator_prev(FLAC__MetaData_Iterator *iterator) |
| 1034 | { |
| 1035 | FLAC__ASSERT(0 != iterator); |
| 1036 | |
| 1037 | if(0 == iterator->current || 0 == iterator->current->prev) |
| 1038 | return false; |
| 1039 | |
| 1040 | iterator->current = iterator->current->prev; |
| 1041 | return true; |
| 1042 | } |
| 1043 | |
| 1044 | FLAC__MetaDataType FLAC__metadata_iterator_get_block_type(const FLAC__MetaData_Iterator *iterator) |
| 1045 | { |
| 1046 | FLAC__ASSERT(0 != iterator); |
| 1047 | FLAC__ASSERT(0 != iterator->current); |
| 1048 | |
| 1049 | return iterator->current->data->type; |
| 1050 | } |
| 1051 | |
| 1052 | FLAC__StreamMetaData *FLAC__metadata_iterator_get_block(FLAC__MetaData_Iterator *iterator) |
| 1053 | { |
| 1054 | FLAC__ASSERT(0 != iterator); |
| 1055 | FLAC__ASSERT(0 != iterator->current); |
| 1056 | |
| 1057 | return iterator->current->data; |
| 1058 | } |
| 1059 | |
| 1060 | FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__MetaData_Iterator *iterator, FLAC__bool replace_with_padding) |
| 1061 | { |
| 1062 | FLAC__MetaData_Node *save; |
| 1063 | |
| 1064 | FLAC__ASSERT(0 != iterator); |
| 1065 | FLAC__ASSERT(0 != iterator->current); |
| 1066 | |
| 1067 | if(0 == iterator->current->prev) { |
| 1068 | FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO); |
| 1069 | return false; |
| 1070 | } |
| 1071 | |
| 1072 | save = iterator->current->prev; |
| 1073 | |
| 1074 | if(replace_with_padding) { |
| 1075 | FLAC__metadata_object_delete_data_(iterator->current->data); |
| 1076 | iterator->current->data->type = FLAC__METADATA_TYPE_PADDING; |
| 1077 | } |
| 1078 | else { |
| 1079 | chain_delete_node_(iterator->chain, iterator->current); |
| 1080 | } |
| 1081 | |
| 1082 | iterator->current = save; |
| 1083 | return true; |
| 1084 | } |
| 1085 | |
| 1086 | FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__MetaData_Iterator *iterator, FLAC__StreamMetaData *block) |
| 1087 | { |
| 1088 | FLAC__MetaData_Node *node; |
| 1089 | |
| 1090 | FLAC__ASSERT(0 != iterator); |
| 1091 | FLAC__ASSERT(0 != iterator->current); |
| 1092 | |
| 1093 | if(block->type == FLAC__METADATA_TYPE_STREAMINFO) |
| 1094 | return false; |
| 1095 | |
| 1096 | if(0 == iterator->current->prev) { |
| 1097 | FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO); |
| 1098 | return false; |
| 1099 | } |
| 1100 | |
| 1101 | if(0 == (node = node_new_())) |
| 1102 | return false; |
| 1103 | |
| 1104 | node->data = block; |
| 1105 | iterator_insert_node_(iterator, node); |
| 1106 | iterator->current = node; |
| 1107 | return true; |
| 1108 | } |
| 1109 | |
| 1110 | FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__MetaData_Iterator *iterator, FLAC__StreamMetaData *block) |
| 1111 | { |
| 1112 | FLAC__MetaData_Node *node; |
| 1113 | |
| 1114 | FLAC__ASSERT(0 != iterator); |
| 1115 | FLAC__ASSERT(0 != iterator->current); |
| 1116 | |
| 1117 | if(block->type == FLAC__METADATA_TYPE_STREAMINFO) |
| 1118 | return false; |
| 1119 | |
| 1120 | if(0 == (node = node_new_())) |
| 1121 | return false; |
| 1122 | |
| 1123 | node->data = block; |
| 1124 | iterator_insert_node_after_(iterator, node); |
| 1125 | iterator->current = node; |
| 1126 | return true; |
| 1127 | } |
| 1128 | |
| 1129 | |
| 1130 | /**************************************************************************** |
| 1131 | * |
| 1132 | * Metadata object routines |
| 1133 | * |
| 1134 | ***************************************************************************/ |
| 1135 | |
| 1136 | FLAC__StreamMetaData *FLAC__metadata_object_new(FLAC__MetaDataType type) |
| 1137 | { |
| 1138 | FLAC__StreamMetaData *object = malloc(sizeof(FLAC__StreamMetaData)); |
| 1139 | if(0 != object) { |
| 1140 | memset(object, 0, sizeof(FLAC__StreamMetaData)); |
| 1141 | object->is_last = false; |
| 1142 | object->type = type; |
| 1143 | switch(type) { |
| 1144 | case FLAC__METADATA_TYPE_STREAMINFO: |
| 1145 | object->length = FLAC__STREAM_METADATA_STREAMINFO_LENGTH; |
| 1146 | break; |
| 1147 | case FLAC__METADATA_TYPE_PADDING: |
| 1148 | break; |
| 1149 | case FLAC__METADATA_TYPE_APPLICATION: |
| 1150 | object->length = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8; |
| 1151 | break; |
| 1152 | case FLAC__METADATA_TYPE_SEEKTABLE: |
| 1153 | break; |
| 1154 | case FLAC__METADATA_TYPE_VORBIS_COMMENT: |
| 1155 | object->length = (FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN + FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8; |
| 1156 | break; |
| 1157 | default: |
| 1158 | FLAC__ASSERT(0); |
| 1159 | } |
| 1160 | } |
| 1161 | |
| 1162 | return object; |
| 1163 | } |
| 1164 | |
| 1165 | static FLAC__bool copy_bytes_(FLAC__byte **to, const FLAC__byte *from, unsigned bytes) |
| 1166 | { |
| 1167 | if(0 == (*to = malloc(bytes))) |
| 1168 | return false; |
| 1169 | memcpy(*to, from, bytes); |
| 1170 | return true; |
| 1171 | } |
| 1172 | |
| 1173 | static FLAC__bool copy_vcentry_(FLAC__StreamMetaData_VorbisComment_Entry *to, const FLAC__StreamMetaData_VorbisComment_Entry *from) |
| 1174 | { |
| 1175 | to->length = from->length; |
| 1176 | if(0 == from->entry) { |
| 1177 | FLAC__ASSERT(0 == from->length); |
| 1178 | to->entry = 0; |
| 1179 | } |
| 1180 | else { |
| 1181 | if(0 == (to->entry = malloc(from->length))) |
| 1182 | return false; |
| 1183 | memcpy(to->entry, from->entry, from->length); |
| 1184 | } |
| 1185 | return true; |
| 1186 | } |
| 1187 | |
| 1188 | FLAC__StreamMetaData *FLAC__metadata_object_copy(const FLAC__StreamMetaData *object) |
| 1189 | { |
| 1190 | FLAC__StreamMetaData *to; |
| 1191 | unsigned i; |
| 1192 | |
| 1193 | FLAC__ASSERT(0 != object); |
| 1194 | |
| 1195 | if(0 != (to = FLAC__metadata_object_new(object->type))) { |
| 1196 | to->is_last = object->is_last; |
| 1197 | to->type = object->type; |
| 1198 | to->length = object->length; |
| 1199 | switch(to->type) { |
| 1200 | case FLAC__METADATA_TYPE_STREAMINFO: |
| 1201 | memcpy(&to->data.stream_info, &object->data.stream_info, sizeof(FLAC__StreamMetaData_StreamInfo)); |
| 1202 | break; |
| 1203 | case FLAC__METADATA_TYPE_PADDING: |
| 1204 | break; |
| 1205 | case FLAC__METADATA_TYPE_APPLICATION: |
| 1206 | memcpy(&to->data.application.id, &object->data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8); |
| 1207 | if(0 == object->data.application.data) |
| 1208 | to->data.application.data = 0; |
| 1209 | else { |
| 1210 | if(!copy_bytes_(&to->data.application.data, object->data.application.data, object->length - FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8)) { |
| 1211 | FLAC__metadata_object_delete(to); |
| 1212 | return 0; |
| 1213 | } |
| 1214 | } |
| 1215 | break; |
| 1216 | case FLAC__METADATA_TYPE_SEEKTABLE: |
| 1217 | to->data.seek_table.num_points = object->data.seek_table.num_points; |
| 1218 | if(0 == object->data.seek_table.points) |
| 1219 | to->data.seek_table.points = 0; |
| 1220 | else { |
| 1221 | if(!copy_bytes_((FLAC__byte**)&to->data.seek_table.points, (FLAC__byte*)object->data.seek_table.points, object->data.seek_table.num_points * sizeof(FLAC__StreamMetaData_SeekPoint))) { |
| 1222 | FLAC__metadata_object_delete(to); |
| 1223 | return 0; |
| 1224 | } |
| 1225 | } |
| 1226 | break; |
| 1227 | case FLAC__METADATA_TYPE_VORBIS_COMMENT: |
| 1228 | if(!copy_vcentry_(&to->data.vorbis_comment.vendor_string, &object->data.vorbis_comment.vendor_string)) { |
| 1229 | FLAC__metadata_object_delete(to); |
| 1230 | return 0; |
| 1231 | } |
| 1232 | to->data.vorbis_comment.num_comments = object->data.vorbis_comment.num_comments; |
| 1233 | if(0 == (to->data.vorbis_comment.comments = malloc(object->data.vorbis_comment.num_comments * sizeof(FLAC__StreamMetaData_VorbisComment_Entry*)))) { |
| 1234 | FLAC__metadata_object_delete(to); |
| 1235 | return 0; |
| 1236 | } |
| 1237 | /* Need to do this to set the pointers inside the comments to 0. |
| 1238 | * In case of an error in the following loop, the object will be |
| 1239 | * deleted and we don't want the destructor freeing uninitialized |
| 1240 | * pointers. |
| 1241 | */ |
| 1242 | memset(to->data.vorbis_comment.comments, 0, object->data.vorbis_comment.num_comments * sizeof(FLAC__StreamMetaData_VorbisComment_Entry*)); |
| 1243 | for(i = 0; i < object->data.vorbis_comment.num_comments; i++) { |
| 1244 | if(!copy_vcentry_(to->data.vorbis_comment.comments+i, object->data.vorbis_comment.comments+i)) { |
| 1245 | FLAC__metadata_object_delete(to); |
| 1246 | return 0; |
| 1247 | } |
| 1248 | } |
| 1249 | break; |
| 1250 | default: |
| 1251 | FLAC__ASSERT(0); |
| 1252 | } |
| 1253 | } |
| 1254 | |
| 1255 | return to; |
| 1256 | } |
| 1257 | |
| 1258 | void FLAC__metadata_object_delete_data_(FLAC__StreamMetaData *object) |
| 1259 | { |
| 1260 | unsigned i; |
| 1261 | |
| 1262 | FLAC__ASSERT(0 != object); |
| 1263 | |
| 1264 | switch(object->type) { |
| 1265 | case FLAC__METADATA_TYPE_STREAMINFO: |
| 1266 | case FLAC__METADATA_TYPE_PADDING: |
| 1267 | break; |
| 1268 | case FLAC__METADATA_TYPE_APPLICATION: |
| 1269 | if(0 != object->data.application.data) |
| 1270 | free(object->data.application.data); |
| 1271 | break; |
| 1272 | case FLAC__METADATA_TYPE_SEEKTABLE: |
| 1273 | if(0 != object->data.seek_table.points) |
| 1274 | free(object->data.seek_table.points); |
| 1275 | break; |
| 1276 | case FLAC__METADATA_TYPE_VORBIS_COMMENT: |
| 1277 | if(0 != object->data.vorbis_comment.vendor_string.entry) |
| 1278 | free(object->data.vorbis_comment.vendor_string.entry); |
| 1279 | for(i = 0; i < object->data.vorbis_comment.num_comments; i++) { |
| 1280 | if(0 != object->data.vorbis_comment.comments[i].entry) |
| 1281 | free(object->data.vorbis_comment.comments[i].entry); |
| 1282 | } |
| 1283 | break; |
| 1284 | default: |
| 1285 | FLAC__ASSERT(0); |
| 1286 | } |
| 1287 | } |
| 1288 | |
| 1289 | void FLAC__metadata_object_delete(FLAC__StreamMetaData *object) |
| 1290 | { |
| 1291 | FLAC__metadata_object_delete_data_(object); |
| 1292 | free(object); |
| 1293 | } |
| 1294 | |
| 1295 | #if 0 |
| 1296 | @@@@ should no longer be needed |
| 1297 | void FLAC__metadata_object_calculate_length(FLAC__StreamMetaData *object) |
| 1298 | { |
| 1299 | unsigned i; |
| 1300 | |
| 1301 | FLAC__ASSERT(0 != object); |
| 1302 | |
| 1303 | switch(type) { |
| 1304 | case FLAC__METADATA_TYPE_STREAMINFO: |
| 1305 | case FLAC__METADATA_TYPE_PADDING: |
| 1306 | /* already calculated on object creation */ |
| 1307 | break; |
| 1308 | case FLAC__METADATA_TYPE_APPLICATION: |
| 1309 | case FLAC__METADATA_TYPE_SEEKTABLE: |
| 1310 | /* already calculated on object creation or _set */ |
| 1311 | break; |
| 1312 | case FLAC__METADATA_TYPE_VORBIS_COMMENT: |
| 1313 | object->length = (FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN) / 8; |
| 1314 | object->length += object->data.vorbis_comment.vendor_string.length; |
| 1315 | object->length += (FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8; |
| 1316 | for(i = 0; i < object->data.vorbis_comment.num_comments; i++) { |
| 1317 | object->length += (FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8); |
| 1318 | object->length += object->data.vorbis_comment.comments[i].length; |
| 1319 | } |
| 1320 | break; |
| 1321 | default: |
| 1322 | FLAC__ASSERT(0); |
| 1323 | } |
| 1324 | } |
| 1325 | #endif |
| 1326 | |
| 1327 | /*@@@@ Allow setting pointer to 0 to free, or let length be 0 also. fix everywhere */ |
| 1328 | FLAC__bool FLAC__metadata_object_application_set_data(FLAC__StreamMetaData *object, FLAC__byte *data, unsigned length, FLAC__bool copy) |
| 1329 | { |
| 1330 | FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_APPLICATION); |
| 1331 | |
| 1332 | if(0 != object->data.application.data) |
| 1333 | free(object->data.application.data); |
| 1334 | |
| 1335 | if(copy) { |
| 1336 | if(!copy_bytes_(&object->data.application.data, data, length)) |
| 1337 | return false; |
| 1338 | } |
| 1339 | else { |
| 1340 | object->data.application.data = data; |
| 1341 | } |
| 1342 | object->length = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8 + length; |
| 1343 | return true; |
| 1344 | } |
| 1345 | |
| 1346 | FLAC__StreamMetaData_SeekPoint *FLAC__metadata_object_seekpoint_array_new(unsigned num_points) |
| 1347 | { |
| 1348 | FLAC__StreamMetaData_SeekPoint *object_array = malloc(num_points * sizeof(FLAC__StreamMetaData_SeekPoint)); |
| 1349 | |
| 1350 | if(0 != object_array) |
| 1351 | memset(object_array, 0, num_points * sizeof(FLAC__StreamMetaData_SeekPoint)); |
| 1352 | |
| 1353 | return object_array; |
| 1354 | } |
| 1355 | |
| 1356 | FLAC__StreamMetaData_SeekPoint *FLAC__metadata_object_seekpoint_array_copy(const FLAC__StreamMetaData_SeekPoint *object_array, unsigned num_points) |
| 1357 | { |
| 1358 | FLAC__StreamMetaData_SeekPoint *return_array; |
| 1359 | |
| 1360 | FLAC__ASSERT(0 != object_array); |
| 1361 | |
| 1362 | return_array = FLAC__metadata_object_seekpoint_array_new(num_points); |
| 1363 | |
| 1364 | if(0 != return_array) |
| 1365 | memcpy(return_array, object_array, num_points * sizeof(FLAC__StreamMetaData_SeekPoint)); |
| 1366 | |
| 1367 | return return_array; |
| 1368 | } |
| 1369 | |
| 1370 | void FLAC__metadata_object_seekpoint_array_delete(FLAC__StreamMetaData_SeekPoint *object_array) |
| 1371 | { |
| 1372 | FLAC__ASSERT(0 != object_array); |
| 1373 | |
| 1374 | free(object_array); |
| 1375 | } |
| 1376 | |
| 1377 | FLAC__bool FLAC__metadata_object_seekpoint_array_resize(FLAC__StreamMetaData_SeekPoint **object_array, unsigned old_num_points, unsigned new_num_points) |
| 1378 | { |
| 1379 | FLAC__ASSERT(0 != object_array); |
| 1380 | |
| 1381 | if(0 == *object_array) { |
| 1382 | FLAC__ASSERT(old_num_points == 0); |
| 1383 | return 0 != (*object_array = FLAC__metadata_object_seekpoint_array_new(new_num_points)); |
| 1384 | } |
| 1385 | else { |
| 1386 | const unsigned old_size = old_num_points * sizeof(FLAC__StreamMetaData_SeekPoint); |
| 1387 | const unsigned new_size = new_num_points * sizeof(FLAC__StreamMetaData_SeekPoint); |
| 1388 | |
| 1389 | if(0 == (*object_array = realloc(*object_array, new_size))) |
| 1390 | return false; |
| 1391 | |
| 1392 | if(new_size > old_size) |
| 1393 | memset(*object_array + old_num_points, 0, new_size - old_size); |
| 1394 | |
| 1395 | return true; |
| 1396 | } |
| 1397 | } |
| 1398 | |
| 1399 | FLAC__bool FLAC__metadata_object_seektable_set_points(FLAC__StreamMetaData *object, FLAC__StreamMetaData_SeekPoint *points, unsigned num_points, FLAC__bool copy) |
| 1400 | { |
| 1401 | FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_SEEKTABLE); |
| 1402 | |
| 1403 | object->data.seek_table.num_points = num_points; |
| 1404 | |
| 1405 | if(0 != object->data.seek_table.points) |
| 1406 | FLAC__metadata_object_seekpoint_array_delete(object->data.seek_table.points); |
| 1407 | |
| 1408 | if(copy) { |
| 1409 | if(0 == (object->data.seek_table.points = FLAC__metadata_object_seekpoint_array_copy(points, num_points))) |
| 1410 | return false; |
| 1411 | } |
| 1412 | else { |
| 1413 | object->data.seek_table.points = points; |
| 1414 | } |
| 1415 | object->length = num_points * FLAC__STREAM_METADATA_SEEKPOINT_LENGTH; |
| 1416 | return true; |
| 1417 | } |
| 1418 | |
| 1419 | FLAC__StreamMetaData_VorbisComment_Entry *FLAC__metadata_object_vorbiscomment_entry_array_new(unsigned num_comments) |
| 1420 | { |
| 1421 | FLAC__StreamMetaData_VorbisComment_Entry *object_array = malloc(num_comments * sizeof(FLAC__StreamMetaData_VorbisComment_Entry)); |
| 1422 | |
| 1423 | if(0 != object_array) |
| 1424 | memset(object_array, 0, num_comments * sizeof(FLAC__StreamMetaData_VorbisComment_Entry)); |
| 1425 | |
| 1426 | return object_array; |
| 1427 | } |
| 1428 | |
| 1429 | FLAC__StreamMetaData_VorbisComment_Entry *FLAC__metadata_object_vorbiscomment_entry_array_copy(const FLAC__StreamMetaData_VorbisComment_Entry *object_array, unsigned num_comments) |
| 1430 | { |
| 1431 | FLAC__StreamMetaData_VorbisComment_Entry *return_array; |
| 1432 | |
| 1433 | FLAC__ASSERT(0 != object_array); |
| 1434 | |
| 1435 | return_array = FLAC__metadata_object_vorbiscomment_entry_array_new(num_comments); |
| 1436 | |
| 1437 | if(0 != return_array) { |
| 1438 | unsigned i; |
| 1439 | for(i = 0; i < num_comments; i++) { |
| 1440 | return_array[i].length = object_array[i].length; |
| 1441 | if(!copy_bytes_(&(return_array[i].entry), object_array[i].entry, object_array[i].length)) { |
| 1442 | FLAC__metadata_object_vorbiscomment_entry_array_delete(return_array, num_comments); |
| 1443 | return 0; |
| 1444 | } |
| 1445 | } |
| 1446 | } |
| 1447 | |
| 1448 | return return_array; |
| 1449 | } |
| 1450 | |
| 1451 | void FLAC__metadata_object_vorbiscomment_entry_array_delete(FLAC__StreamMetaData_VorbisComment_Entry *object_array, unsigned num_comments) |
| 1452 | { |
| 1453 | unsigned i; |
| 1454 | |
| 1455 | FLAC__ASSERT(0 != object_array); |
| 1456 | |
| 1457 | for(i = 0; i < num_comments; i++) |
| 1458 | if(0 != object_array[i].entry) |
| 1459 | free(object_array[i].entry); |
| 1460 | |
| 1461 | free(object_array); |
| 1462 | } |
| 1463 | |
| 1464 | FLAC__bool FLAC__metadata_object_vorbiscomment_entry_array_resize(FLAC__StreamMetaData_VorbisComment_Entry **object_array, unsigned old_num_comments, unsigned new_num_comments) |
| 1465 | { |
| 1466 | FLAC__ASSERT(0 != object_array); |
| 1467 | |
| 1468 | if(0 == *object_array) { |
| 1469 | FLAC__ASSERT(old_num_comments == 0); |
| 1470 | return 0 != (*object_array = FLAC__metadata_object_vorbiscomment_entry_array_new(new_num_comments)); |
| 1471 | } |
| 1472 | else { |
| 1473 | const unsigned old_size = old_num_comments * sizeof(FLAC__StreamMetaData_VorbisComment_Entry); |
| 1474 | const unsigned new_size = new_num_comments * sizeof(FLAC__StreamMetaData_VorbisComment_Entry); |
| 1475 | |
| 1476 | /* if shrinking, free the truncated entries */ |
| 1477 | if(new_num_comments < old_num_comments) { |
| 1478 | unsigned i; |
| 1479 | for(i = new_num_comments; i < old_num_comments; i++) |
| 1480 | free((*object_array)[i].entry); |
| 1481 | } |
| 1482 | |
| 1483 | if(0 == (*object_array = realloc(*object_array, new_size))) |
| 1484 | return false; |
| 1485 | |
| 1486 | /* if growing, zero all the length/pointers of new elements */ |
| 1487 | if(new_size > old_size) |
| 1488 | memset(*object_array + old_num_comments, 0, new_size - old_size); |
| 1489 | |
| 1490 | return true; |
| 1491 | } |
| 1492 | } |
| 1493 | |
| 1494 | FLAC__bool FLAC__metadata_object_vorbiscomment_set_vendor_string(FLAC__StreamMetaData *object, FLAC__byte *entry, unsigned length, FLAC__bool copy) |
| 1495 | { |
| 1496 | FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT); |
| 1497 | |
| 1498 | if(0 != object->data.vorbis_comment.vendor_string.entry) |
| 1499 | free(object->data.vorbis_comment.vendor_string.entry); |
| 1500 | |
| 1501 | object->length -= object->data.vorbis_comment.vendor_string.length; |
| 1502 | |
| 1503 | if(copy) { |
| 1504 | if(!copy_bytes_(&object->data.vorbis_comment.vendor_string.entry, entry, length)) { |
| 1505 | object->data.vorbis_comment.vendor_string.length = 0; |
| 1506 | return false; |
| 1507 | } |
| 1508 | } |
| 1509 | else { |
| 1510 | object->data.vorbis_comment.vendor_string.entry = entry; |
| 1511 | } |
| 1512 | |
| 1513 | object->data.vorbis_comment.vendor_string.length = length; |
| 1514 | object->length += object->data.vorbis_comment.vendor_string.length; |
| 1515 | |
| 1516 | return true; |
| 1517 | } |
| 1518 | |
| 1519 | FLAC__bool FLAC__metadata_object_vorbiscomment_set_comments(FLAC__StreamMetaData *object, FLAC__StreamMetaData_VorbisComment_Entry *comments, unsigned num_comments, FLAC__bool copy) |
| 1520 | { |
| 1521 | unsigned i; |
| 1522 | |
| 1523 | FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT); |
| 1524 | |
| 1525 | object->data.vorbis_comment.num_comments = num_comments; |
| 1526 | |
| 1527 | if(0 != object->data.vorbis_comment.comments) |
| 1528 | FLAC__metadata_object_vorbiscomment_entry_array_delete(object->data.vorbis_comment.comments, num_comments); |
| 1529 | |
| 1530 | if(copy) { |
| 1531 | if(0 == (object->data.vorbis_comment.comments = FLAC__metadata_object_vorbiscomment_entry_array_copy(comments, num_comments))) |
| 1532 | return false; |
| 1533 | } |
| 1534 | else { |
| 1535 | object->data.vorbis_comment.comments = comments; |
| 1536 | } |
| 1537 | object->length = num_comments * FLAC__STREAM_METADATA_SEEKPOINT_LENGTH; |
| 1538 | |
| 1539 | /* calculate the new length */ |
| 1540 | object->length = (FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN) / 8; |
| 1541 | object->length += object->data.vorbis_comment.vendor_string.length; |
| 1542 | object->length += (FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8; |
| 1543 | for(i = 0; i < object->data.vorbis_comment.num_comments; i++) { |
| 1544 | object->length += (FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8); |
| 1545 | object->length += object->data.vorbis_comment.comments[i].length; |
| 1546 | } |
| 1547 | |
| 1548 | return true; |
| 1549 | } |
| 1550 | |
| 1551 | |
| 1552 | /**************************************************************************** |
| 1553 | * |
| 1554 | * Local function definitions |
| 1555 | * |
| 1556 | ***************************************************************************/ |
| 1557 | |
| 1558 | void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes) |
| 1559 | { |
| 1560 | unsigned i; |
| 1561 | |
| 1562 | b += bytes; |
| 1563 | |
| 1564 | for(i = 0; i < bytes; i++) { |
| 1565 | *(--b) = val & 0xff; |
| 1566 | val >>= 8; |
| 1567 | } |
| 1568 | } |
| 1569 | |
| 1570 | void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes) |
| 1571 | { |
| 1572 | unsigned i; |
| 1573 | |
| 1574 | for(i = 0; i < bytes; i++) { |
| 1575 | *(b++) = val & 0xff; |
| 1576 | val >>= 8; |
| 1577 | } |
| 1578 | } |
| 1579 | |
| 1580 | void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes) |
| 1581 | { |
| 1582 | unsigned i; |
| 1583 | |
| 1584 | b += bytes; |
| 1585 | |
| 1586 | for(i = 0; i < bytes; i++) { |
| 1587 | *(--b) = val & 0xff; |
| 1588 | val >>= 8; |
| 1589 | } |
| 1590 | } |
| 1591 | |
| 1592 | FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes) |
| 1593 | { |
| 1594 | FLAC__uint32 ret = 0; |
| 1595 | unsigned i; |
| 1596 | |
| 1597 | for(i = 0; i < bytes; i++) |
| 1598 | ret = (ret << 8) | (FLAC__uint32)(*b++); |
| 1599 | |
| 1600 | return ret; |
| 1601 | } |
| 1602 | |
| 1603 | FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes) |
| 1604 | { |
| 1605 | FLAC__uint32 ret = 0; |
| 1606 | unsigned i; |
| 1607 | |
| 1608 | b += bytes; |
| 1609 | |
| 1610 | for(i = 0; i < bytes; i++) |
| 1611 | ret = (ret << 8) | (FLAC__uint32)(*--b); |
| 1612 | |
| 1613 | return ret; |
| 1614 | } |
| 1615 | |
| 1616 | FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes) |
| 1617 | { |
| 1618 | FLAC__uint64 ret = 0; |
| 1619 | unsigned i; |
| 1620 | |
| 1621 | for(i = 0; i < bytes; i++) |
| 1622 | ret = (ret << 8) | (FLAC__uint64)(*b++); |
| 1623 | |
| 1624 | return ret; |
| 1625 | } |
| 1626 | |
| 1627 | FLAC__bool read_metadata_block_header_(FLAC__MetaData_SimpleIterator *iterator) |
| 1628 | { |
| 1629 | FLAC__byte raw_header[4]; /*@@@ 4 = MAGIC NUMBER for metadata block header bytes */ |
| 1630 | |
| 1631 | FLAC__ASSERT(0 != iterator); |
| 1632 | FLAC__ASSERT(0 != iterator->file); |
| 1633 | |
| 1634 | if(fread(raw_header, 1, 4, iterator->file) != 4) { /*@@@ 4 = MAGIC NUMBER for metadata block header bytes */ |
| 1635 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1636 | return false; |
| 1637 | } |
| 1638 | |
| 1639 | iterator->is_last = raw_header[0] & 0x80? true : false; |
| 1640 | iterator->type = (FLAC__MetaDataType)(raw_header[0] & 0x7f); |
| 1641 | iterator->length = unpack_uint32_(raw_header + 1, 3); |
| 1642 | |
| 1643 | return true; |
| 1644 | } |
| 1645 | |
| 1646 | FLAC__bool read_metadata_block_data_(FLAC__MetaData_SimpleIterator *iterator, FLAC__StreamMetaData *block) |
| 1647 | { |
| 1648 | FLAC__ASSERT(0 != iterator); |
| 1649 | FLAC__ASSERT(0 != iterator->file); |
| 1650 | |
| 1651 | switch(block->type) { |
| 1652 | case FLAC__METADATA_TYPE_STREAMINFO: |
| 1653 | iterator->status = read_metadata_block_data_streaminfo_(iterator->file, &block->data.stream_info); |
| 1654 | break; |
| 1655 | case FLAC__METADATA_TYPE_PADDING: |
| 1656 | iterator->status = read_metadata_block_data_padding_(iterator->file, &block->data.padding, block->length); |
| 1657 | break; |
| 1658 | case FLAC__METADATA_TYPE_APPLICATION: |
| 1659 | iterator->status = read_metadata_block_data_application_(iterator->file, &block->data.application, block->length); |
| 1660 | break; |
| 1661 | case FLAC__METADATA_TYPE_SEEKTABLE: |
| 1662 | iterator->status = read_metadata_block_data_seektable_(iterator->file, &block->data.seek_table, block->length); |
| 1663 | break; |
| 1664 | case FLAC__METADATA_TYPE_VORBIS_COMMENT: |
| 1665 | iterator->status = read_metadata_block_data_vorbis_comment_(iterator->file, &block->data.vorbis_comment); |
| 1666 | break; |
| 1667 | default: |
| 1668 | FLAC__ASSERT(0); |
| 1669 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR; |
| 1670 | } |
| 1671 | |
| 1672 | return (iterator->status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK); |
| 1673 | } |
| 1674 | |
| 1675 | FLAC__MetaData_SimpleIteratorStatus read_metadata_block_data_streaminfo_(FILE *file, FLAC__StreamMetaData_StreamInfo *block) |
| 1676 | { |
| 1677 | FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH], *b; |
| 1678 | |
| 1679 | FLAC__ASSERT(0 != file); |
| 1680 | |
| 1681 | if(fread(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, file) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH) |
| 1682 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1683 | |
| 1684 | b = buffer; |
| 1685 | |
| 1686 | /* @@@ we are using hardcoded numbers for simplicity but we should |
| 1687 | * probably eventually write a bit-level unpacker and use the |
| 1688 | * _STREAMINFO_ constants. |
| 1689 | */ |
| 1690 | block->min_blocksize = unpack_uint32_(b, 2); b += 2; |
| 1691 | block->max_blocksize = unpack_uint32_(b, 2); b += 2; |
| 1692 | block->min_framesize = unpack_uint32_(b, 3); b += 3; |
| 1693 | block->max_framesize = unpack_uint32_(b, 3); b += 3; |
| 1694 | block->sample_rate = (unpack_uint32_(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4); |
| 1695 | block->channels = (unsigned)((b[2] & 0x0e) >> 1) + 1; |
| 1696 | block->bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 1) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1; |
| 1697 | block->total_samples = (((FLAC__uint64)(b[3] & 0x0f)) << 32) | unpack_uint64_(b+4, 4); |
| 1698 | memcpy(block->md5sum, b+8, 16); |
| 1699 | |
| 1700 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1701 | } |
| 1702 | |
| 1703 | |
| 1704 | FLAC__MetaData_SimpleIteratorStatus read_metadata_block_data_padding_(FILE *file, FLAC__StreamMetaData_Padding *block, unsigned block_length) |
| 1705 | { |
| 1706 | FLAC__ASSERT(0 != file); |
| 1707 | |
| 1708 | (void)block; /* nothing to do; we don't care about reading the padding bytes */ |
| 1709 | |
| 1710 | if(0 != fseek(file, block_length, SEEK_CUR)) |
| 1711 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1712 | |
| 1713 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1714 | } |
| 1715 | |
| 1716 | FLAC__MetaData_SimpleIteratorStatus read_metadata_block_data_application_(FILE *file, FLAC__StreamMetaData_Application *block, unsigned block_length) |
| 1717 | { |
| 1718 | const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8; |
| 1719 | |
| 1720 | FLAC__ASSERT(0 != file); |
| 1721 | |
| 1722 | if(fread(block->id, 1, id_bytes, file) != id_bytes) |
| 1723 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1724 | |
| 1725 | block_length -= id_bytes; |
| 1726 | |
| 1727 | if(0 == (block->data = malloc(block_length))) |
| 1728 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 1729 | |
| 1730 | if(fread(block->data, 1, block_length, file) != block_length) |
| 1731 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1732 | |
| 1733 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1734 | } |
| 1735 | |
| 1736 | FLAC__MetaData_SimpleIteratorStatus read_metadata_block_data_seektable_(FILE *file, FLAC__StreamMetaData_SeekTable *block, unsigned block_length) |
| 1737 | { |
| 1738 | unsigned i; |
| 1739 | FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH]; |
| 1740 | |
| 1741 | FLAC__ASSERT(0 != file); |
| 1742 | FLAC__ASSERT(block_length % FLAC__STREAM_METADATA_SEEKPOINT_LENGTH == 0); |
| 1743 | |
| 1744 | block->num_points = block_length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH; |
| 1745 | |
| 1746 | if(0 == (block->points = malloc(block->num_points * sizeof(FLAC__StreamMetaData_SeekPoint)))) |
| 1747 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 1748 | |
| 1749 | for(i = 0; i < block->num_points; i++) { |
| 1750 | if(fread(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, file) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH) |
| 1751 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1752 | /*@@@ some MAGIC NUMBERs here */ |
| 1753 | block->points[i].sample_number = unpack_uint64_(buffer, 8); |
| 1754 | block->points[i].stream_offset = unpack_uint64_(buffer+8, 8); |
| 1755 | block->points[i].frame_samples = unpack_uint32_(buffer+16, 2); |
| 1756 | } |
| 1757 | |
| 1758 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1759 | } |
| 1760 | |
| 1761 | FLAC__MetaData_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_(FILE *file, FLAC__StreamMetaData_VorbisComment_Entry *entry) |
| 1762 | { |
| 1763 | const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8; |
| 1764 | FLAC__byte buffer[FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8]; |
| 1765 | |
| 1766 | FLAC__ASSERT(0 != file); |
| 1767 | |
| 1768 | if(fread(buffer, 1, entry_length_len, file) != entry_length_len) |
| 1769 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1770 | entry->length = unpack_uint32_little_endian_(buffer, 4); |
| 1771 | |
| 1772 | if(0 == (entry->entry = malloc(entry->length))) |
| 1773 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 1774 | |
| 1775 | if(fread(entry->entry, 1, entry->length, file) != entry->length) |
| 1776 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1777 | |
| 1778 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1779 | } |
| 1780 | |
| 1781 | FLAC__MetaData_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_(FILE *file, FLAC__StreamMetaData_VorbisComment *block) |
| 1782 | { |
| 1783 | unsigned i; |
| 1784 | FLAC__MetaData_SimpleIteratorStatus status; |
| 1785 | const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8; |
| 1786 | FLAC__byte buffer[FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8]; |
| 1787 | |
| 1788 | FLAC__ASSERT(0 != file); |
| 1789 | |
| 1790 | if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_(file, &(block->vendor_string)))) |
| 1791 | return status; |
| 1792 | |
| 1793 | if(fread(buffer, 1, num_comments_len, file) != num_comments_len) |
| 1794 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 1795 | block->num_comments = unpack_uint32_little_endian_(buffer, num_comments_len); |
| 1796 | |
| 1797 | if(0 == (block->comments = malloc(block->num_comments * sizeof(FLAC__StreamMetaData_VorbisComment_Entry)))) |
| 1798 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 1799 | |
| 1800 | for(i = 0; i < block->num_comments; i++) { |
| 1801 | if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_(file, block->comments + i))) |
| 1802 | return status; |
| 1803 | } |
| 1804 | |
| 1805 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1806 | } |
| 1807 | |
| 1808 | FLAC__bool write_metadata_block_header_(FILE *file, FLAC__MetaData_SimpleIteratorStatus *status, const FLAC__StreamMetaData *block) |
| 1809 | { |
| 1810 | FLAC__byte buffer[4]; |
| 1811 | |
| 1812 | FLAC__ASSERT(0 != file); |
| 1813 | FLAC__ASSERT(0 != status); |
| 1814 | FLAC__ASSERT(block->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN)); |
| 1815 | |
| 1816 | buffer[0] = (block->is_last? 0x80 : 0) | (FLAC__byte)block->type; |
| 1817 | pack_uint32_(block->length, buffer + 1, 3); |
| 1818 | |
| 1819 | if(fwrite(buffer, 1, 4, file) != 4) { |
| 1820 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1821 | return false; |
| 1822 | } |
| 1823 | |
| 1824 | return true; |
| 1825 | } |
| 1826 | |
| 1827 | FLAC__bool write_metadata_block_data_(FILE *file, FLAC__MetaData_SimpleIteratorStatus *status, const FLAC__StreamMetaData *block) |
| 1828 | { |
| 1829 | FLAC__ASSERT(0 != file); |
| 1830 | FLAC__ASSERT(0 != status); |
| 1831 | |
| 1832 | switch(block->type) { |
| 1833 | case FLAC__METADATA_TYPE_STREAMINFO: |
| 1834 | *status = write_metadata_block_data_streaminfo_(file, &block->data.stream_info); |
| 1835 | break; |
| 1836 | case FLAC__METADATA_TYPE_PADDING: |
| 1837 | *status = write_metadata_block_data_padding_(file, &block->data.padding, block->length); |
| 1838 | break; |
| 1839 | case FLAC__METADATA_TYPE_APPLICATION: |
| 1840 | *status = write_metadata_block_data_application_(file, &block->data.application, block->length); |
| 1841 | break; |
| 1842 | case FLAC__METADATA_TYPE_SEEKTABLE: |
| 1843 | *status = write_metadata_block_data_seektable_(file, &block->data.seek_table); |
| 1844 | break; |
| 1845 | case FLAC__METADATA_TYPE_VORBIS_COMMENT: |
| 1846 | *status = write_metadata_block_data_vorbis_comment_(file, &block->data.vorbis_comment); |
| 1847 | break; |
| 1848 | default: |
| 1849 | FLAC__ASSERT(0); |
| 1850 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR; |
| 1851 | } |
| 1852 | return (*status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK); |
| 1853 | } |
| 1854 | |
| 1855 | FLAC__MetaData_SimpleIteratorStatus write_metadata_block_data_streaminfo_(FILE *file, const FLAC__StreamMetaData_StreamInfo *block) |
| 1856 | { |
| 1857 | FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH]; |
| 1858 | const unsigned channels1 = block->channels - 1; |
| 1859 | const unsigned bps1 = block->bits_per_sample - 1; |
| 1860 | |
| 1861 | FLAC__ASSERT(0 != file); |
| 1862 | |
| 1863 | /* @@@ we are using hardcoded numbers for simplicity but we should |
| 1864 | * probably eventually write a bit-level packer and use the |
| 1865 | * _STREAMINFO_ constants. |
| 1866 | */ |
| 1867 | pack_uint32_(block->min_blocksize, buffer, 2); |
| 1868 | pack_uint32_(block->max_blocksize, buffer+2, 2); |
| 1869 | pack_uint32_(block->min_framesize, buffer+4, 3); |
| 1870 | pack_uint32_(block->max_framesize, buffer+7, 3); |
| 1871 | buffer[10] = (block->sample_rate >> 12) & 0xff; |
| 1872 | buffer[11] = (block->sample_rate >> 4) & 0xff; |
| 1873 | buffer[12] = ((block->sample_rate & 0x0f) << 4) | (channels1 << 1) | (bps1 >> 4); |
| 1874 | buffer[13] = ((bps1 & 0x0f) << 4) | ((block->total_samples >> 32) & 0x0f); |
| 1875 | pack_uint32_((FLAC__uint32)block->total_samples, buffer+14, 4); |
| 1876 | memcpy(buffer+18, block->md5sum, 16); |
| 1877 | |
| 1878 | if(fwrite(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, file) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH) |
| 1879 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1880 | |
| 1881 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1882 | } |
| 1883 | |
| 1884 | FLAC__MetaData_SimpleIteratorStatus write_metadata_block_data_padding_(FILE *file, const FLAC__StreamMetaData_Padding *block, unsigned block_length) |
| 1885 | { |
| 1886 | unsigned i, n = block_length; |
| 1887 | FLAC__byte buffer[1024]; |
| 1888 | |
| 1889 | FLAC__ASSERT(0 != file); |
| 1890 | |
| 1891 | (void)block; |
| 1892 | |
| 1893 | memset(buffer, 0, 1024); |
| 1894 | |
| 1895 | for(i = 0; i < n/1024; i++) |
| 1896 | if(fwrite(buffer, 1, 1024, file) != 1024) |
| 1897 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1898 | |
| 1899 | n %= 1024; |
| 1900 | |
| 1901 | if(fwrite(buffer, 1, n, file) != n) |
| 1902 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1903 | |
| 1904 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1905 | } |
| 1906 | |
| 1907 | FLAC__MetaData_SimpleIteratorStatus write_metadata_block_data_application_(FILE *file, const FLAC__StreamMetaData_Application *block, unsigned block_length) |
| 1908 | { |
| 1909 | const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8; |
| 1910 | |
| 1911 | FLAC__ASSERT(0 != file); |
| 1912 | |
| 1913 | if(fwrite(block->id, 1, id_bytes, file) != id_bytes) |
| 1914 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1915 | |
| 1916 | block_length -= id_bytes; |
| 1917 | |
| 1918 | if(fwrite(block->data, 1, block_length, file) != block_length) |
| 1919 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1920 | |
| 1921 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1922 | } |
| 1923 | |
| 1924 | FLAC__MetaData_SimpleIteratorStatus write_metadata_block_data_seektable_(FILE *file, const FLAC__StreamMetaData_SeekTable *block) |
| 1925 | { |
| 1926 | unsigned i; |
| 1927 | FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH]; |
| 1928 | |
| 1929 | FLAC__ASSERT(0 != file); |
| 1930 | |
| 1931 | for(i = 0; i < block->num_points; i++) { |
| 1932 | /*@@@ some MAGIC NUMBERs here */ |
| 1933 | pack_uint64_(block->points[i].sample_number, buffer, 8); |
| 1934 | pack_uint64_(block->points[i].stream_offset, buffer+8, 8); |
| 1935 | pack_uint32_(block->points[i].frame_samples, buffer+16, 2); |
| 1936 | if(fwrite(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, file) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH) |
| 1937 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1938 | } |
| 1939 | |
| 1940 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1941 | } |
| 1942 | |
| 1943 | FLAC__MetaData_SimpleIteratorStatus write_metadata_block_data_vorbis_comment_(FILE *file, const FLAC__StreamMetaData_VorbisComment *block) |
| 1944 | { |
| 1945 | unsigned i; |
| 1946 | const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8; |
| 1947 | const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8; |
| 1948 | FLAC__byte buffer[max(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN, FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8]; |
| 1949 | |
| 1950 | FLAC__ASSERT(0 != file); |
| 1951 | |
| 1952 | pack_uint32_little_endian_(block->vendor_string.length, buffer, entry_length_len); |
| 1953 | if(fwrite(buffer, 1, entry_length_len, file) != entry_length_len) |
| 1954 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1955 | if(fwrite(block->vendor_string.entry, 1, block->vendor_string.length, file) != block->vendor_string.length) |
| 1956 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1957 | |
| 1958 | pack_uint32_little_endian_(block->num_comments, buffer, num_comments_len); |
| 1959 | if(fwrite(buffer, 1, num_comments_len, file) != num_comments_len) |
| 1960 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1961 | |
| 1962 | for(i = 0; i < block->num_comments; i++) { |
| 1963 | pack_uint32_little_endian_(block->comments[i].length, buffer, entry_length_len); |
| 1964 | if(fwrite(buffer, 1, entry_length_len, file) != entry_length_len) |
| 1965 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1966 | if(fwrite(block->comments[i].entry, 1, block->comments[i].length, file) != block->comments[i].length) |
| 1967 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 1968 | } |
| 1969 | |
| 1970 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK; |
| 1971 | } |
| 1972 | |
| 1973 | FLAC__bool write_metadata_block_stationary_(FLAC__MetaData_SimpleIterator *iterator, const FLAC__StreamMetaData *block) |
| 1974 | { |
| 1975 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) { |
| 1976 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1977 | return false; |
| 1978 | } |
| 1979 | |
| 1980 | if(!write_metadata_block_header_(iterator->file, &iterator->status, block)) |
| 1981 | return false; |
| 1982 | |
| 1983 | if(!write_metadata_block_data_(iterator->file, &iterator->status, block)) |
| 1984 | return false; |
| 1985 | |
| 1986 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) { |
| 1987 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 1988 | return false; |
| 1989 | } |
| 1990 | |
| 1991 | return read_metadata_block_header_(iterator); |
| 1992 | } |
| 1993 | |
| 1994 | FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__MetaData_SimpleIterator *iterator, FLAC__StreamMetaData *block, unsigned padding_length, FLAC__bool padding_is_last) |
| 1995 | { |
| 1996 | FLAC__StreamMetaData *padding; |
| 1997 | |
| 1998 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) { |
| 1999 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 2000 | return false; |
| 2001 | } |
| 2002 | |
| 2003 | block->is_last = false; |
| 2004 | |
| 2005 | if(!write_metadata_block_header_(iterator->file, &iterator->status, block)) |
| 2006 | return false; |
| 2007 | |
| 2008 | if(!write_metadata_block_data_(iterator->file, &iterator->status, block)) |
| 2009 | return false; |
| 2010 | |
| 2011 | if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) |
| 2012 | return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 2013 | |
| 2014 | padding->is_last = padding_is_last; |
| 2015 | padding->length = padding_length; |
| 2016 | |
| 2017 | if(!write_metadata_block_header_(iterator->file, &iterator->status, padding)) { |
| 2018 | FLAC__metadata_object_delete(padding); |
| 2019 | return false; |
| 2020 | } |
| 2021 | |
| 2022 | if(!write_metadata_block_data_(iterator->file, &iterator->status, padding)) { |
| 2023 | FLAC__metadata_object_delete(padding); |
| 2024 | return false; |
| 2025 | } |
| 2026 | |
| 2027 | FLAC__metadata_object_delete(padding); |
| 2028 | |
| 2029 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) { |
| 2030 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 2031 | return false; |
| 2032 | } |
| 2033 | |
| 2034 | return read_metadata_block_header_(iterator); |
| 2035 | } |
| 2036 | |
| 2037 | FLAC__bool rewrite_whole_file_(FLAC__MetaData_SimpleIterator *iterator, FLAC__StreamMetaData *block, FLAC__bool append) |
| 2038 | { |
| 2039 | FILE *tempfile; |
| 2040 | char *tempfilename; |
| 2041 | long fixup_is_last_flag_offset; |
| 2042 | |
| 2043 | if(!simple_iterator_copy_file_prefix_(iterator, &tempfile, &tempfilename, append)) |
| 2044 | return false; |
| 2045 | |
| 2046 | if(0 != block) { |
| 2047 | if(!write_metadata_block_header_(tempfile, &iterator->status, block)) { |
| 2048 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 2049 | return false; |
| 2050 | } |
| 2051 | |
| 2052 | if(!write_metadata_block_data_(tempfile, &iterator->status, block)) { |
| 2053 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 2054 | return false; |
| 2055 | } |
| 2056 | } |
| 2057 | |
| 2058 | if(append && iterator->is_last) |
| 2059 | fixup_is_last_flag_offset = iterator->offset[iterator->depth]; /*@@@ MAGIC NUMBER; we know the is_last flag is here */ |
| 2060 | else |
| 2061 | fixup_is_last_flag_offset = -1; |
| 2062 | if(!simple_iterator_copy_file_postfix_(iterator, &tempfile, &tempfilename, fixup_is_last_flag_offset, block==0)) |
| 2063 | return false; |
| 2064 | |
| 2065 | return true; |
| 2066 | } |
| 2067 | |
| 2068 | FLAC__bool chain_rewrite_chain_(FLAC__MetaData_Chain *chain) |
| 2069 | { |
| 2070 | FILE *f; |
| 2071 | FLAC__MetaData_Node *node; |
| 2072 | FLAC__MetaData_SimpleIteratorStatus status; |
| 2073 | |
| 2074 | FLAC__ASSERT(0 != chain); |
| 2075 | FLAC__ASSERT(0 != chain->filename); |
| 2076 | FLAC__ASSERT(0 != chain->head); |
| 2077 | |
| 2078 | if(0 == (f = fopen(chain->filename, "r+b"))) { |
| 2079 | chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE; |
| 2080 | return false; |
| 2081 | } |
| 2082 | if(0 != fseek(f, chain->first_offset, SEEK_SET)) { |
| 2083 | chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR; |
| 2084 | return false; |
| 2085 | } |
| 2086 | |
| 2087 | for(node = chain->head; node; node = node->next) { |
| 2088 | if(!write_metadata_block_header_(f, &status, node->data)) { |
| 2089 | chain->status = get_equivalent_status_(status); |
| 2090 | return false; |
| 2091 | } |
| 2092 | if(!write_metadata_block_data_(f, &status, node->data)) { |
| 2093 | chain->status = get_equivalent_status_(status); |
| 2094 | return false; |
| 2095 | } |
| 2096 | } |
| 2097 | |
| 2098 | /*FLAC__ASSERT(fflush(), ftell() == chain->last_offset);*/ |
| 2099 | |
| 2100 | (void)fclose(f); |
| 2101 | |
| 2102 | return true; |
| 2103 | } |
| 2104 | |
| 2105 | FLAC__bool chain_rewrite_file_(FLAC__MetaData_Chain *chain, const char *tempfile_path_prefix) |
| 2106 | { |
| 2107 | FILE *f, *tempfile; |
| 2108 | char *tempfilename; |
| 2109 | FLAC__MetaData_SimpleIteratorStatus status; |
| 2110 | const FLAC__MetaData_Node *node; |
| 2111 | |
| 2112 | FLAC__ASSERT(0 != chain); |
| 2113 | FLAC__ASSERT(0 != chain->filename); |
| 2114 | FLAC__ASSERT(0 != chain->head); |
| 2115 | |
| 2116 | /* copy the file prefix (data up to first metadata block */ |
| 2117 | if(0 == (f = fopen(chain->filename, "rb"))) { |
| 2118 | chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE; |
| 2119 | return false; |
| 2120 | } |
| 2121 | if(!open_tempfile_(chain->filename, tempfile_path_prefix, &tempfile, &tempfilename, &status)) { |
| 2122 | chain->status = get_equivalent_status_(status); |
| 2123 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 2124 | return false; |
| 2125 | } |
| 2126 | if(!copy_n_bytes_from_file_(f, tempfile, chain->first_offset, &status)) { |
| 2127 | chain->status = get_equivalent_status_(status); |
| 2128 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 2129 | return false; |
| 2130 | } |
| 2131 | |
| 2132 | /* write the metadata */ |
| 2133 | for(node = chain->head; node; node = node->next) { |
| 2134 | if(!write_metadata_block_header_(tempfile, &status, node->data)) { |
| 2135 | chain->status = get_equivalent_status_(status); |
| 2136 | return false; |
| 2137 | } |
| 2138 | if(!write_metadata_block_data_(tempfile, &status, node->data)) { |
| 2139 | chain->status = get_equivalent_status_(status); |
| 2140 | return false; |
| 2141 | } |
| 2142 | } |
| 2143 | /*FLAC__ASSERT(fflush(), ftell() == chain->last_offset);*/ |
| 2144 | |
| 2145 | /* copy the file postfix (everything after the metadata) */ |
| 2146 | if(0 != fseek(f, chain->last_offset, SEEK_SET)) { |
| 2147 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 2148 | chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR; |
| 2149 | return false; |
| 2150 | } |
| 2151 | if(!copy_remaining_bytes_from_file_(f, tempfile, &status)) { |
| 2152 | cleanup_tempfile_(&tempfile, &tempfilename); |
| 2153 | chain->status = get_equivalent_status_(status); |
| 2154 | return false; |
| 2155 | } |
| 2156 | |
| 2157 | /* move the tempfile on top of the original */ |
| 2158 | (void)fclose(f); |
| 2159 | if(!transport_tempfile_(chain->filename, &tempfile, &tempfilename, &status)) |
| 2160 | return false; |
| 2161 | |
| 2162 | return true; |
| 2163 | } |
| 2164 | |
| 2165 | void simple_iterator_push_(FLAC__MetaData_SimpleIterator *iterator) |
| 2166 | { |
| 2167 | FLAC__ASSERT(iterator->depth+1 < SIMPLE_ITERATOR_MAX_PUSH_DEPTH); |
| 2168 | iterator->offset[iterator->depth+1] = iterator->offset[iterator->depth]; |
| 2169 | iterator->depth++; |
| 2170 | } |
| 2171 | |
| 2172 | FLAC__bool simple_iterator_pop_(FLAC__MetaData_SimpleIterator *iterator) |
| 2173 | { |
| 2174 | FLAC__ASSERT(iterator->depth > 0); |
| 2175 | iterator->depth--; |
| 2176 | if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) { |
| 2177 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 2178 | return false; |
| 2179 | } |
| 2180 | |
| 2181 | return read_metadata_block_header_(iterator); |
| 2182 | } |
| 2183 | |
| 2184 | unsigned seek_to_first_metadata_block_(FILE *f) |
| 2185 | { |
| 2186 | FLAC__byte signature[4]; /*@@@ 4 = MAGIC NUMBER for signature bytes */ |
| 2187 | |
| 2188 | FLAC__ASSERT(0 != f); |
| 2189 | |
| 2190 | /*@@@@ skip id3v2, change comment about id3v2 in metadata.h*/ |
| 2191 | |
| 2192 | /* search for the fLaC signature */ |
| 2193 | if(fread(signature, 1, 4, f) == 4) { /*@@@ 4 = MAGIC NUMBER for signature bytes */ |
| 2194 | if(0 == memcmp(FLAC__STREAM_SYNC_STRING, signature, 4)) { |
| 2195 | return 0; |
| 2196 | } |
| 2197 | else { |
| 2198 | return 2; |
| 2199 | } |
| 2200 | } |
| 2201 | else { |
| 2202 | return 1; |
| 2203 | } |
| 2204 | } |
| 2205 | |
| 2206 | FLAC__bool simple_iterator_copy_file_prefix_(FLAC__MetaData_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append) |
| 2207 | { |
| 2208 | const long offset_end = append? iterator->offset[iterator->depth] + 4 + (long)iterator->length : iterator->offset[iterator->depth]; /*@@@ MAGIC NUMBER 4 = metadata block header bytes */ |
| 2209 | |
| 2210 | if(0 != fseek(iterator->file, 0, SEEK_SET)) { |
| 2211 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 2212 | return false; |
| 2213 | } |
| 2214 | if(!open_tempfile_(iterator->filename, iterator->tempfile_path_prefix, tempfile, tempfilename, &iterator->status)) { |
| 2215 | cleanup_tempfile_(tempfile, tempfilename); |
| 2216 | return false; |
| 2217 | } |
| 2218 | if(!copy_n_bytes_from_file_(iterator->file, *tempfile, offset_end, &iterator->status)) { |
| 2219 | cleanup_tempfile_(tempfile, tempfilename); |
| 2220 | return false; |
| 2221 | } |
| 2222 | |
| 2223 | return true; |
| 2224 | } |
| 2225 | |
| 2226 | FLAC__bool simple_iterator_copy_file_postfix_(FLAC__MetaData_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, long fixup_is_last_flag_offset, FLAC__bool backup) |
| 2227 | { |
| 2228 | long save_offset = iterator->offset[iterator->depth]; /*@@@ 2G limit */ |
| 2229 | FLAC__ASSERT(0 != *tempfile); |
| 2230 | |
| 2231 | /*@@@ MAGIC NUMBER 4 = metadata header bytes */ |
| 2232 | if(0 != fseek(iterator->file, save_offset + 4 + iterator->length, SEEK_SET)) { |
| 2233 | cleanup_tempfile_(tempfile, tempfilename); |
| 2234 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 2235 | return false; |
| 2236 | } |
| 2237 | if(!copy_remaining_bytes_from_file_(iterator->file, *tempfile, &iterator->status)) { |
| 2238 | cleanup_tempfile_(tempfile, tempfilename); |
| 2239 | return false; |
| 2240 | } |
| 2241 | |
| 2242 | if(fixup_is_last_flag_offset >= 0) { |
| 2243 | /* this means a block was appended to the end so we have to clear the is_last flag of the previous block */ |
| 2244 | /*@@@ MAGIC NUMBERs here; we know the is_last flag is the hit bit of the byte at this location */ |
| 2245 | FLAC__byte x; |
| 2246 | if(0 != fseek(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) { |
| 2247 | cleanup_tempfile_(tempfile, tempfilename); |
| 2248 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 2249 | return false; |
| 2250 | } |
| 2251 | if(fread(&x, 1, 1, *tempfile) != 1) { |
| 2252 | cleanup_tempfile_(tempfile, tempfilename); |
| 2253 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 2254 | return false; |
| 2255 | } |
| 2256 | FLAC__ASSERT(x & 0x80); |
| 2257 | x &= 0x7f; |
| 2258 | if(0 != fseek(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) { |
| 2259 | cleanup_tempfile_(tempfile, tempfilename); |
| 2260 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR; |
| 2261 | return false; |
| 2262 | } |
| 2263 | if(fwrite(&x, 1, 1, *tempfile) != 1) { |
| 2264 | cleanup_tempfile_(tempfile, tempfilename); |
| 2265 | iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 2266 | return false; |
| 2267 | } |
| 2268 | } |
| 2269 | |
| 2270 | (void)fclose(iterator->file); |
| 2271 | |
| 2272 | if(!transport_tempfile_(iterator->filename, tempfile, tempfilename, &iterator->status)) |
| 2273 | return false; |
| 2274 | |
| 2275 | if(iterator->has_stats) |
| 2276 | set_file_stats_(iterator->filename, &iterator->stats); |
| 2277 | |
| 2278 | if(!simple_iterator_prime_input_(iterator)) |
| 2279 | return false; |
| 2280 | if(backup) { |
| 2281 | while(iterator->offset[iterator->depth] + 4 + (long)iterator->length < save_offset) |
| 2282 | if(!FLAC__metadata_simple_iterator_next(iterator)) |
| 2283 | return false; |
| 2284 | return true; |
| 2285 | } |
| 2286 | else { |
| 2287 | /* move the iterator to it's original block faster by faking a push, then doing a pop_ */ |
| 2288 | FLAC__ASSERT(iterator->depth == 0); |
| 2289 | iterator->offset[0] = save_offset; |
| 2290 | iterator->depth++; |
| 2291 | return simple_iterator_pop_(iterator); |
| 2292 | } |
| 2293 | } |
| 2294 | |
| 2295 | FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, unsigned bytes/*@@@ 4G limit*/, FLAC__MetaData_SimpleIteratorStatus *status) |
| 2296 | { |
| 2297 | FLAC__byte buffer[8192]; |
| 2298 | unsigned n; |
| 2299 | |
| 2300 | while(bytes > 0) { |
| 2301 | n = min(sizeof(buffer), bytes); |
| 2302 | if(fread(buffer, 1, n, file) != n) { |
| 2303 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 2304 | return false; |
| 2305 | } |
| 2306 | if(fwrite(buffer, 1, n, tempfile) != n) { |
| 2307 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 2308 | return false; |
| 2309 | } |
| 2310 | bytes -= n; |
| 2311 | } |
| 2312 | |
| 2313 | return true; |
| 2314 | } |
| 2315 | |
| 2316 | FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__MetaData_SimpleIteratorStatus *status) |
| 2317 | { |
| 2318 | FLAC__byte buffer[8192]; |
| 2319 | size_t n; |
| 2320 | |
| 2321 | while(!feof(file)) { |
| 2322 | n = fread(buffer, 1, sizeof(buffer), file); |
| 2323 | if(n == 0 && !feof(file)) { |
| 2324 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR; |
| 2325 | return false; |
| 2326 | } |
| 2327 | if(n > 0 && fwrite(buffer, 1, n, tempfile) != n) { |
| 2328 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR; |
| 2329 | return false; |
| 2330 | } |
| 2331 | } |
| 2332 | |
| 2333 | return true; |
| 2334 | } |
| 2335 | |
| 2336 | FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__MetaData_SimpleIteratorStatus *status) |
| 2337 | { |
| 2338 | static const char *tempfile_suffix = ".metadata_edit"; |
| 2339 | if(0 == tempfile_path_prefix) { |
| 2340 | if(0 == (*tempfilename = malloc(strlen(filename) + strlen(tempfile_suffix) + 1))) { |
| 2341 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 2342 | return false; |
| 2343 | } |
| 2344 | strcpy(*tempfilename, filename); |
| 2345 | strcat(*tempfilename, tempfile_suffix); |
| 2346 | } |
| 2347 | else { |
| 2348 | const char *p = strrchr(filename, '/'); |
| 2349 | if(0 == p) |
| 2350 | p = filename; |
| 2351 | else |
| 2352 | p++; |
| 2353 | |
| 2354 | if(0 == (*tempfilename = malloc(strlen(tempfile_path_prefix) + 1 + strlen(p) + strlen(tempfile_suffix) + 1))) { |
| 2355 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR; |
| 2356 | return false; |
| 2357 | } |
| 2358 | strcpy(*tempfilename, tempfile_path_prefix); |
| 2359 | strcat(*tempfilename, "/"); |
| 2360 | strcat(*tempfilename, p); |
| 2361 | strcat(*tempfilename, tempfile_suffix); |
| 2362 | } |
| 2363 | |
| 2364 | if(0 == (*tempfile = fopen(*tempfilename, "wb"))) { |
| 2365 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE; |
| 2366 | return false; |
| 2367 | } |
| 2368 | |
| 2369 | return true; |
| 2370 | } |
| 2371 | |
| 2372 | FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__MetaData_SimpleIteratorStatus *status) |
| 2373 | { |
| 2374 | FLAC__ASSERT(0 != filename); |
| 2375 | FLAC__ASSERT(0 != tempfile); |
| 2376 | FLAC__ASSERT(0 != *tempfile); |
| 2377 | FLAC__ASSERT(0 != tempfilename); |
| 2378 | FLAC__ASSERT(0 != *tempfilename); |
| 2379 | FLAC__ASSERT(0 != status); |
| 2380 | |
| 2381 | (void)fclose(*tempfile); |
| 2382 | *tempfile = 0; |
| 2383 | /*@@@ to fully support the tempfile_path_prefix we need to update this piece to actually copy across filesystems instead of just rename(): */ |
| 2384 | if(0 != rename(*tempfilename, filename)) { |
| 2385 | cleanup_tempfile_(tempfile, tempfilename); |
| 2386 | *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR; |
| 2387 | return false; |
| 2388 | } |
| 2389 | |
| 2390 | cleanup_tempfile_(tempfile, tempfilename); |
| 2391 | |
| 2392 | return true; |
| 2393 | } |
| 2394 | |
| 2395 | void cleanup_tempfile_(FILE **tempfile, char **tempfilename) |
| 2396 | { |
| 2397 | if(0 != *tempfile) { |
| 2398 | (void)fclose(*tempfile); |
| 2399 | *tempfile = 0; |
| 2400 | } |
| 2401 | |
| 2402 | if(0 != *tempfilename) { |
| 2403 | (void)unlink(*tempfilename); |
| 2404 | free(*tempfilename); |
| 2405 | *tempfilename = 0; |
| 2406 | } |
| 2407 | } |
| 2408 | |
| 2409 | FLAC__bool get_file_stats_(const char *filename, struct stat *stats) |
| 2410 | { |
| 2411 | FLAC__ASSERT(0 != filename); |
| 2412 | FLAC__ASSERT(0 != stats); |
| 2413 | return (0 == stat(filename, stats)); |
| 2414 | } |
| 2415 | |
| 2416 | void set_file_stats_(const char *filename, struct stat *stats) |
| 2417 | { |
| 2418 | struct utimbuf srctime; |
| 2419 | |
| 2420 | FLAC__ASSERT(0 != filename); |
| 2421 | FLAC__ASSERT(0 != stats); |
| 2422 | |
| 2423 | srctime.actime = stats->st_atime; |
| 2424 | srctime.modtime = stats->st_mtime; |
| 2425 | (void)chmod(filename, stats->st_mode); |
| 2426 | (void)utime(filename, &srctime); |
| 2427 | #if !defined _MSC_VER && !defined __MINGW32__ |
| 2428 | (void)chown(filename, stats->st_uid, -1); |
| 2429 | (void)chown(filename, -1, stats->st_gid); |
| 2430 | #endif |
| 2431 | } |
| 2432 | |
| 2433 | FLAC__MetaData_ChainStatus get_equivalent_status_(FLAC__MetaData_SimpleIteratorStatus status) |
| 2434 | { |
| 2435 | switch(status) { |
| 2436 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK: |
| 2437 | return FLAC__METADATA_CHAIN_STATUS_OK; |
| 2438 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT: |
| 2439 | return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT; |
| 2440 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE: |
| 2441 | return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE; |
| 2442 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE: |
| 2443 | return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE; |
| 2444 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE: |
| 2445 | return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE; |
| 2446 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR: |
| 2447 | return FLAC__METADATA_CHAIN_STATUS_READ_ERROR; |
| 2448 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR: |
| 2449 | return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR; |
| 2450 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR: |
| 2451 | return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR; |
| 2452 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR: |
| 2453 | return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR; |
| 2454 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR: |
| 2455 | return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR; |
| 2456 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR: |
| 2457 | return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; |
| 2458 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR: |
| 2459 | default: |
| 2460 | return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; |
| 2461 | } |
| 2462 | } |