1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2001,2002,2003 Josh Coalson
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.
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.
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.
20 #if !defined _MSC_VER && !defined __MINGW32__
21 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
28 #if defined _MSC_VER || defined __MINGW32__
29 #include <sys/utime.h> /* for utime() */
30 #include <io.h> /* for chmod() */
32 #include <sys/types.h> /* some flavors of BSD (like OS X) require this to get time_t */
33 #include <utime.h> /* for utime() */
34 #include <unistd.h> /* for chown(), unlink() */
36 #include <sys/stat.h> /* for stat(), maybe chmod() */
38 #include "private/metadata.h"
40 #include "FLAC/assert.h"
41 #include "FLAC/file_decoder.h"
46 #define max(a,b) ((a)>(b)?(a):(b))
50 #define min(a,b) ((a)<(b)?(a):(b))
53 /****************************************************************************
55 * Local function declarations
57 ***************************************************************************/
59 static void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
60 static void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
61 static void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes);
62 static FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes);
63 static FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes);
64 static FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes);
66 static FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator);
67 static FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block);
68 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_(FILE *file, FLAC__StreamMetadata_StreamInfo *block);
69 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_(FILE *file, FLAC__StreamMetadata_Padding *block, unsigned block_length);
70 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_(FILE *file, FLAC__StreamMetadata_Application *block, unsigned block_length);
71 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_(FILE *file, FLAC__StreamMetadata_SeekTable *block, unsigned block_length);
72 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_(FILE *file, FLAC__StreamMetadata_VorbisComment_Entry *entry);
73 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_(FILE *file, FLAC__StreamMetadata_VorbisComment *block);
74 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_(FILE *file, FLAC__StreamMetadata_CueSheet_Track *track);
75 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_(FILE *file, FLAC__StreamMetadata_CueSheet *block);
76 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_unknown_(FILE *file, FLAC__StreamMetadata_Unknown *block, unsigned block_length);
78 static FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
79 static FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
80 static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_streaminfo_(FILE *file, const FLAC__StreamMetadata_StreamInfo *block);
81 static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_padding_(FILE *file, const FLAC__StreamMetadata_Padding *block, unsigned block_length);
82 static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_application_(FILE *file, const FLAC__StreamMetadata_Application *block, unsigned block_length);
83 static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_seektable_(FILE *file, const FLAC__StreamMetadata_SeekTable *block);
84 static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_vorbis_comment_(FILE *file, const FLAC__StreamMetadata_VorbisComment *block);
85 static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_cuesheet_(FILE *file, const FLAC__StreamMetadata_CueSheet *block);
86 static FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_unknown_(FILE *file, const FLAC__StreamMetadata_Unknown *block, unsigned block_length);
87 static FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block);
88 static FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last);
89 static FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append);
91 static FLAC__bool chain_rewrite_chain_(FLAC__Metadata_Chain *chain);
92 static FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix);
94 static void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator);
95 static FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator);
97 /* return 0 if OK, 1 if read error, 2 if not a FLAC file */
98 static unsigned seek_to_first_metadata_block_(FILE *f);
100 static FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append);
101 static FLAC__bool simple_iterator_copy_file_postfix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, int fixup_is_last_code, long fixup_is_last_flag_offset, FLAC__bool backup);
103 static FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, unsigned bytes/*@@@ 4G limit*/, FLAC__Metadata_SimpleIteratorStatus *status);
104 static FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status);
106 static FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
107 static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
108 static void cleanup_tempfile_(FILE **tempfile, char **tempfilename);
110 static FLAC__bool get_file_stats_(const char *filename, struct stat *stats);
111 static void set_file_stats_(const char *filename, struct stat *stats);
113 static FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status);
116 #ifdef FLAC__VALGRIND_TESTING
117 static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
119 size_t ret = fwrite(ptr, size, nmemb, stream);
125 #define local__fwrite fwrite
128 /****************************************************************************
130 * Level 0 implementation
132 ***************************************************************************/
134 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
135 static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
136 static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
139 FLAC__bool got_error;
140 FLAC__bool got_streaminfo;
141 FLAC__StreamMetadata *streaminfo;
142 } level0_client_data;
144 FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo)
146 level0_client_data cd;
147 FLAC__FileDecoder *decoder;
149 FLAC__ASSERT(0 != filename);
150 FLAC__ASSERT(0 != streaminfo);
152 decoder = FLAC__file_decoder_new();
157 cd.got_error = false;
158 cd.got_streaminfo = false;
159 cd.streaminfo = streaminfo;
161 FLAC__file_decoder_set_md5_checking(decoder, false);
162 FLAC__file_decoder_set_filename(decoder, filename);
163 FLAC__file_decoder_set_metadata_ignore_all(decoder);
164 FLAC__file_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_STREAMINFO);
165 FLAC__file_decoder_set_write_callback(decoder, write_callback_);
166 FLAC__file_decoder_set_metadata_callback(decoder, metadata_callback_);
167 FLAC__file_decoder_set_error_callback(decoder, error_callback_);
168 FLAC__file_decoder_set_client_data(decoder, &cd);
170 if(FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK || cd.got_error) {
171 FLAC__file_decoder_finish(decoder);
172 FLAC__file_decoder_delete(decoder);
176 /* the first thing decoded must be the STREAMINFO block: */
177 if(!FLAC__file_decoder_process_until_end_of_metadata(decoder) || cd.got_error) {
178 FLAC__file_decoder_finish(decoder);
179 FLAC__file_decoder_delete(decoder);
183 FLAC__file_decoder_finish(decoder);
184 FLAC__file_decoder_delete(decoder);
186 return !cd.got_error && cd.got_streaminfo;
189 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
191 (void)decoder, (void)frame, (void)buffer, (void)client_data;
193 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
196 void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
198 level0_client_data *cd = (level0_client_data *)client_data;
201 if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO && 0 != cd->streaminfo) {
202 *(cd->streaminfo) = *metadata;
203 cd->got_streaminfo = true;
207 void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
209 level0_client_data *cd = (level0_client_data *)client_data;
212 if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
213 cd->got_error = true;
217 /****************************************************************************
219 * Level 1 implementation
221 ***************************************************************************/
223 #define SIMPLE_ITERATOR_MAX_PUSH_DEPTH (1+4)
224 /* 1 for initial offset, +4 for our own personal use */
226 struct FLAC__Metadata_SimpleIterator {
228 char *filename, *tempfile_path_prefix;
230 FLAC__bool has_stats;
231 FLAC__bool is_writable;
232 FLAC__Metadata_SimpleIteratorStatus status;
233 /*@@@ 2G limits here because of the offset type: */
234 long offset[SIMPLE_ITERATOR_MAX_PUSH_DEPTH];
235 long first_offset; /* this is the offset to the STREAMINFO block */
237 /* this is the metadata block header of the current block we are pointing to: */
239 FLAC__MetadataType type;
243 FLAC_API const char * const FLAC__Metadata_SimpleIteratorStatusString[] = {
244 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK",
245 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT",
246 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE",
247 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE",
248 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE",
249 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA",
250 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR",
251 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR",
252 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR",
253 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR",
254 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR",
255 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR",
256 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR"
260 FLAC_API FLAC__Metadata_SimpleIterator *FLAC__metadata_simple_iterator_new()
262 FLAC__Metadata_SimpleIterator *iterator = (FLAC__Metadata_SimpleIterator*)calloc(1, sizeof(FLAC__Metadata_SimpleIterator));
266 iterator->filename = 0;
267 iterator->tempfile_path_prefix = 0;
268 iterator->has_stats = false;
269 iterator->is_writable = false;
270 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
271 iterator->first_offset = iterator->offset[0] = -1;
278 static void simple_iterator_free_guts_(FLAC__Metadata_SimpleIterator *iterator)
280 FLAC__ASSERT(0 != iterator);
282 if(0 != iterator->file) {
283 fclose(iterator->file);
285 if(iterator->has_stats)
286 set_file_stats_(iterator->filename, &iterator->stats);
288 if(0 != iterator->filename) {
289 free(iterator->filename);
290 iterator->filename = 0;
292 if(0 != iterator->tempfile_path_prefix) {
293 free(iterator->tempfile_path_prefix);
294 iterator->tempfile_path_prefix = 0;
298 FLAC_API void FLAC__metadata_simple_iterator_delete(FLAC__Metadata_SimpleIterator *iterator)
300 FLAC__ASSERT(0 != iterator);
302 simple_iterator_free_guts_(iterator);
306 FLAC_API FLAC__Metadata_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__Metadata_SimpleIterator *iterator)
308 FLAC__Metadata_SimpleIteratorStatus status;
310 FLAC__ASSERT(0 != iterator);
312 status = iterator->status;
313 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
317 static FLAC__bool simple_iterator_prime_input_(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool read_only)
321 FLAC__ASSERT(0 != iterator);
323 if(read_only || 0 == (iterator->file = fopen(iterator->filename, "r+b"))) {
324 iterator->is_writable = false;
325 #if !defined _MSC_VER && !defined __MINGW32__
326 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
327 if(read_only || errno == EACCES) {
329 if(0 == (iterator->file = fopen(iterator->filename, "rb"))) {
330 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
333 #if !defined _MSC_VER && !defined __MINGW32__
336 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
342 iterator->is_writable = true;
345 ret = seek_to_first_metadata_block_(iterator->file);
349 iterator->first_offset = iterator->offset[iterator->depth] = ftell(iterator->file);
350 return read_metadata_block_header_(iterator);
352 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
355 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE;
364 @@@ If we decide to finish implementing this, put this comment back in metadata.h
366 * The 'tempfile_path_prefix' allows you to specify a directory where
367 * tempfiles should go. Remember that if your metadata edits cause the
368 * FLAC file to grow, the entire file will have to be rewritten. If
369 * 'tempfile_path_prefix' is NULL, the temp file will be written in the
370 * same directory as the original FLAC file. This makes replacing the
371 * original with the tempfile fast but requires extra space in the same
372 * partition for the tempfile. If space is a problem, you can pass a
373 * directory name belonging to a different partition in
374 * 'tempfile_path_prefix'. Note that you should use the forward slash
375 * '/' as the directory separator. A trailing slash is not needed; it
376 * will be added automatically.
378 FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats, const char *tempfile_path_prefix);
381 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool read_only, FLAC__bool preserve_file_stats)
383 const char *tempfile_path_prefix = 0; /*@@@ search for comments near 'rename(...)' for what it will take to finish implementing this */
385 FLAC__ASSERT(0 != iterator);
386 FLAC__ASSERT(0 != filename);
388 simple_iterator_free_guts_(iterator);
390 if(!read_only && preserve_file_stats)
391 iterator->has_stats = get_file_stats_(filename, &iterator->stats);
393 if(0 == (iterator->filename = strdup(filename))) {
394 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
397 if(0 != tempfile_path_prefix && 0 == (iterator->tempfile_path_prefix = strdup(tempfile_path_prefix))) {
398 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
402 return simple_iterator_prime_input_(iterator, read_only);
405 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__Metadata_SimpleIterator *iterator)
407 FLAC__ASSERT(0 != iterator);
408 FLAC__ASSERT(0 != iterator->file);
410 return iterator->is_writable;
413 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__Metadata_SimpleIterator *iterator)
415 FLAC__ASSERT(0 != iterator);
416 FLAC__ASSERT(0 != iterator->file);
418 if(iterator->is_last)
421 if(0 != fseek(iterator->file, iterator->length, SEEK_CUR)) {
422 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
426 iterator->offset[iterator->depth] = ftell(iterator->file);
428 return read_metadata_block_header_(iterator);
431 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__Metadata_SimpleIterator *iterator)
435 FLAC__ASSERT(0 != iterator);
436 FLAC__ASSERT(0 != iterator->file);
438 if(iterator->offset[iterator->depth] == iterator->first_offset)
441 if(0 != fseek(iterator->file, iterator->first_offset, SEEK_SET)) {
442 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
445 this_offset = iterator->first_offset;
446 if(!read_metadata_block_header_(iterator))
449 /* we ignore any error from ftell() and catch it in fseek() */
450 while(ftell(iterator->file) + (long)iterator->length < iterator->offset[iterator->depth]) {
451 if(0 != fseek(iterator->file, iterator->length, SEEK_CUR)) {
452 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
455 this_offset = ftell(iterator->file);
456 if(!read_metadata_block_header_(iterator))
460 iterator->offset[iterator->depth] = this_offset;
465 FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator)
467 FLAC__ASSERT(0 != iterator);
468 FLAC__ASSERT(0 != iterator->file);
470 return iterator->type;
473 FLAC_API FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator)
475 FLAC__StreamMetadata *block = FLAC__metadata_object_new(iterator->type);
477 FLAC__ASSERT(0 != iterator);
478 FLAC__ASSERT(0 != iterator->file);
481 block->is_last = iterator->is_last;
482 block->length = iterator->length;
484 if(!read_metadata_block_data_(iterator, block)) {
485 FLAC__metadata_object_delete(block);
489 /* back up to the beginning of the block data to stay consistent */
490 if(0 != fseek(iterator->file, iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH, SEEK_SET)) {
491 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
492 FLAC__metadata_object_delete(block);
497 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
502 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
504 FLAC__ASSERT_DECLARATION(long debug_target_offset = iterator->offset[iterator->depth];)
507 FLAC__ASSERT(0 != iterator);
508 FLAC__ASSERT(0 != iterator->file);
509 FLAC__ASSERT(0 != block);
511 if(!iterator->is_writable) {
512 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
516 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO || block->type == FLAC__METADATA_TYPE_STREAMINFO) {
517 if(iterator->type != block->type) {
518 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
523 block->is_last = iterator->is_last;
525 if(iterator->length == block->length)
526 return write_metadata_block_stationary_(iterator, block);
527 else if(iterator->length > block->length) {
528 if(use_padding && iterator->length >= FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) {
529 ret = write_metadata_block_stationary_with_padding_(iterator, block, iterator->length - FLAC__STREAM_METADATA_HEADER_LENGTH - block->length, block->is_last);
530 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
531 FLAC__ASSERT(!ret || ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
535 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
536 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
537 FLAC__ASSERT(!ret || ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
541 else /* iterator->length < block->length */ {
542 unsigned padding_leftover = 0;
543 FLAC__bool padding_is_last = false;
545 /* first see if we can even use padding */
546 if(iterator->is_last) {
550 const unsigned extra_padding_bytes_required = block->length - iterator->length;
551 simple_iterator_push_(iterator);
552 if(!FLAC__metadata_simple_iterator_next(iterator)) {
553 (void)simple_iterator_pop_(iterator);
556 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
560 if(FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length == extra_padding_bytes_required) {
561 padding_leftover = 0;
562 block->is_last = iterator->is_last;
564 else if(iterator->length < extra_padding_bytes_required)
567 padding_leftover = FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length - extra_padding_bytes_required;
568 padding_is_last = iterator->is_last;
569 block->is_last = false;
572 if(!simple_iterator_pop_(iterator))
577 if(padding_leftover == 0) {
578 ret = write_metadata_block_stationary_(iterator, block);
579 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
580 FLAC__ASSERT(!ret || ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
584 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
585 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
586 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
587 FLAC__ASSERT(!ret || ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
592 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
593 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
594 FLAC__ASSERT(!ret || ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
600 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
602 unsigned padding_leftover = 0;
603 FLAC__bool padding_is_last = false;
605 FLAC__ASSERT_DECLARATION(long debug_target_offset = iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length;)
608 FLAC__ASSERT(0 != iterator);
609 FLAC__ASSERT(0 != iterator->file);
610 FLAC__ASSERT(0 != block);
612 if(!iterator->is_writable)
615 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
616 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
620 block->is_last = iterator->is_last;
623 /* first see if we can even use padding */
624 if(iterator->is_last) {
628 simple_iterator_push_(iterator);
629 if(!FLAC__metadata_simple_iterator_next(iterator)) {
630 (void)simple_iterator_pop_(iterator);
633 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
637 if(iterator->length == block->length) {
638 padding_leftover = 0;
639 block->is_last = iterator->is_last;
641 else if(iterator->length < FLAC__STREAM_METADATA_HEADER_LENGTH + block->length)
644 padding_leftover = iterator->length - block->length;
645 padding_is_last = iterator->is_last;
646 block->is_last = false;
649 if(!simple_iterator_pop_(iterator))
654 /* move to the next block, which is suitable padding */
655 if(!FLAC__metadata_simple_iterator_next(iterator))
657 if(padding_leftover == 0) {
658 ret = write_metadata_block_stationary_(iterator, block);
659 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
660 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
664 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
665 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
666 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
667 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
672 ret = rewrite_whole_file_(iterator, block, /*append=*/true);
673 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
674 FLAC__ASSERT(ftell(iterator->file) == debug_target_offset + (long)FLAC__STREAM_METADATA_HEADER_LENGTH);
679 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool use_padding)
681 FLAC__ASSERT_DECLARATION(long debug_target_offset = iterator->offset[iterator->depth];)
684 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO) {
685 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
690 FLAC__StreamMetadata *padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
692 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
695 padding->length = iterator->length;
696 if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false)) {
697 FLAC__metadata_object_delete(padding);
700 FLAC__metadata_object_delete(padding);
701 if(!FLAC__metadata_simple_iterator_prev(iterator))
703 FLAC__ASSERT(iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length == debug_target_offset);
704 FLAC__ASSERT(ftell(iterator->file) + (long)iterator->length == debug_target_offset);
708 ret = rewrite_whole_file_(iterator, 0, /*append=*/false);
709 FLAC__ASSERT(iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length == debug_target_offset);
710 FLAC__ASSERT(ftell(iterator->file) + (long)iterator->length == debug_target_offset);
717 /****************************************************************************
719 * Level 2 implementation
721 ***************************************************************************/
724 typedef struct FLAC__Metadata_Node {
725 FLAC__StreamMetadata *data;
726 struct FLAC__Metadata_Node *prev, *next;
727 } FLAC__Metadata_Node;
729 struct FLAC__Metadata_Chain {
731 FLAC__Metadata_Node *head;
732 FLAC__Metadata_Node *tail;
734 FLAC__Metadata_ChainStatus status;
735 long first_offset, last_offset; /*@@@ 2G limit */
737 * This is the length of the chain initially read from the FLAC file.
738 * it is used to compare against the current length to decide whether
739 * or not the whole file has to be rewritten.
741 unsigned initial_length; /*@@@ 4G limit */
744 struct FLAC__Metadata_Iterator {
745 FLAC__Metadata_Chain *chain;
746 FLAC__Metadata_Node *current;
749 FLAC_API const char * const FLAC__Metadata_ChainStatusString[] = {
750 "FLAC__METADATA_CHAIN_STATUS_OK",
751 "FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT",
752 "FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE",
753 "FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE",
754 "FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE",
755 "FLAC__METADATA_CHAIN_STATUS_BAD_METADATA",
756 "FLAC__METADATA_CHAIN_STATUS_READ_ERROR",
757 "FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR",
758 "FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR",
759 "FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR",
760 "FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR",
761 "FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR",
762 "FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR"
766 static FLAC__Metadata_Node *node_new_()
768 return (FLAC__Metadata_Node*)calloc(1, sizeof(FLAC__Metadata_Node));
771 static void node_delete_(FLAC__Metadata_Node *node)
773 FLAC__ASSERT(0 != node);
775 FLAC__metadata_object_delete(node->data);
779 static void chain_append_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
781 FLAC__ASSERT(0 != chain);
782 FLAC__ASSERT(0 != node);
783 FLAC__ASSERT(0 != node->data);
785 node->next = node->prev = 0;
786 node->data->is_last = true;
788 chain->tail->data->is_last = false;
793 FLAC__ASSERT(0 != chain->tail);
794 chain->tail->next = node;
795 node->prev = chain->tail;
801 static void chain_remove_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
803 FLAC__ASSERT(0 != chain);
804 FLAC__ASSERT(0 != node);
806 if(node == chain->head)
807 chain->head = node->next;
809 node->prev->next = node->next;
811 if(node == chain->tail)
812 chain->tail = node->prev;
814 node->next->prev = node->prev;
817 chain->tail->data->is_last = true;
822 static void chain_delete_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
824 chain_remove_node_(chain, node);
828 static unsigned chain_calculate_length_(FLAC__Metadata_Chain *chain)
830 const FLAC__Metadata_Node *node;
832 for(node = chain->head; node; node = node->next)
833 length += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
837 static void iterator_insert_node_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
839 FLAC__ASSERT(0 != node);
840 FLAC__ASSERT(0 != node->data);
841 FLAC__ASSERT(0 != iterator);
842 FLAC__ASSERT(0 != iterator->current);
843 FLAC__ASSERT(0 != iterator->chain);
844 FLAC__ASSERT(0 != iterator->chain->head);
845 FLAC__ASSERT(0 != iterator->chain->tail);
847 node->data->is_last = false;
849 node->prev = iterator->current->prev;
850 node->next = iterator->current;
853 iterator->chain->head = node;
855 node->prev->next = node;
857 iterator->current->prev = node;
859 iterator->chain->nodes++;
862 static void iterator_insert_node_after_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
864 FLAC__ASSERT(0 != node);
865 FLAC__ASSERT(0 != node->data);
866 FLAC__ASSERT(0 != iterator);
867 FLAC__ASSERT(0 != iterator->current);
868 FLAC__ASSERT(0 != iterator->chain);
869 FLAC__ASSERT(0 != iterator->chain->head);
870 FLAC__ASSERT(0 != iterator->chain->tail);
872 iterator->current->data->is_last = false;
874 node->prev = iterator->current;
875 node->next = iterator->current->next;
878 iterator->chain->tail = node;
880 node->next->prev = node;
882 node->prev->next = node;
884 iterator->chain->tail->data->is_last = true;
886 iterator->chain->nodes++;
889 /* return true iff node and node->next are both padding */
890 static FLAC__bool chain_merge_adjacent_padding_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
892 if(node->data->type == FLAC__METADATA_TYPE_PADDING && 0 != node->next && node->next->data->type == FLAC__METADATA_TYPE_PADDING) {
893 const unsigned growth = FLAC__STREAM_METADATA_HEADER_LENGTH + node->next->data->length;
894 node->data->length += growth;
896 chain_delete_node_(chain, node->next);
903 FLAC_API FLAC__Metadata_Chain *FLAC__metadata_chain_new()
905 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)calloc(1, sizeof(FLAC__Metadata_Chain));
909 chain->head = chain->tail = 0;
911 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
912 chain->initial_length = 0;
918 FLAC_API void FLAC__metadata_chain_delete(FLAC__Metadata_Chain *chain)
920 FLAC__Metadata_Node *node, *next;
922 FLAC__ASSERT(0 != chain);
924 for(node = chain->head; node; ) {
930 if(0 != chain->filename)
931 free(chain->filename);
936 FLAC_API FLAC__Metadata_ChainStatus FLAC__metadata_chain_status(FLAC__Metadata_Chain *chain)
938 FLAC__Metadata_ChainStatus status;
940 FLAC__ASSERT(0 != chain);
942 status = chain->status;
943 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
947 FLAC_API FLAC__bool FLAC__metadata_chain_read(FLAC__Metadata_Chain *chain, const char *filename)
949 FLAC__Metadata_SimpleIterator *iterator;
950 FLAC__Metadata_Node *node;
952 FLAC__ASSERT(0 != chain);
953 FLAC__ASSERT(0 != filename);
955 if(0 == (chain->filename = strdup(filename))) {
956 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
960 if(0 == (iterator = FLAC__metadata_simple_iterator_new())) {
961 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
965 if(!FLAC__metadata_simple_iterator_init(iterator, filename, /*read_only=*/true, /*preserve_file_stats=*/false)) {
966 chain->status = get_equivalent_status_(iterator->status);
970 chain->first_offset = iterator->offset[iterator->depth];
975 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
978 node->data = FLAC__metadata_simple_iterator_get_block(iterator);
979 if(0 == node->data) {
981 chain->status = get_equivalent_status_(iterator->status);
984 chain_append_node_(chain, node);
985 } while(FLAC__metadata_simple_iterator_next(iterator));
987 if(!iterator->is_last || iterator->status != FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK) {
988 chain->status = get_equivalent_status_(iterator->status);
992 chain->last_offset = ftell(iterator->file) + iterator->length;
993 FLAC__metadata_simple_iterator_delete(iterator);
995 chain->initial_length = chain_calculate_length_(chain);
999 FLAC_API FLAC__bool FLAC__metadata_chain_write(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats)
1002 const char *tempfile_path_prefix = 0;
1003 unsigned current_length;
1005 FLAC__ASSERT(0 != chain);
1007 current_length = chain_calculate_length_(chain);
1010 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1011 const unsigned delta = chain->initial_length - current_length;
1012 chain->tail->data->length += delta;
1013 current_length += delta;
1014 FLAC__ASSERT(current_length == chain->initial_length);
1016 else if(current_length + FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) {
1017 FLAC__StreamMetadata *padding;
1018 FLAC__Metadata_Node *node;
1019 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) {
1020 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1023 padding->length = chain->initial_length - (FLAC__STREAM_METADATA_HEADER_LENGTH + current_length);
1024 if(0 == (node = node_new_())) {
1025 FLAC__metadata_object_delete(padding);
1026 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1029 node->data = padding;
1030 chain_append_node_(chain, node);
1031 current_length = chain_calculate_length_(chain);
1032 FLAC__ASSERT(current_length == chain->initial_length);
1034 else if(current_length > chain->initial_length) {
1035 const unsigned delta = current_length - chain->initial_length;
1036 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1037 if(chain->tail->data->length + FLAC__STREAM_METADATA_HEADER_LENGTH == delta) {
1038 chain_delete_node_(chain, chain->tail);
1039 current_length = chain_calculate_length_(chain);
1040 FLAC__ASSERT(current_length == chain->initial_length);
1042 else if(chain->tail->data->length >= delta) {
1043 chain->tail->data->length -= delta;
1044 current_length -= delta;
1045 FLAC__ASSERT(current_length == chain->initial_length);
1051 if(preserve_file_stats)
1052 get_file_stats_(chain->filename, &stats);
1054 if(current_length == chain->initial_length) {
1055 if(!chain_rewrite_chain_(chain))
1059 if(!chain_rewrite_file_(chain, tempfile_path_prefix))
1063 if(preserve_file_stats)
1064 set_file_stats_(chain->filename, &stats);
1066 /* recompute lengths and offsets if necessary */
1067 if(chain->initial_length != current_length) {
1068 const FLAC__Metadata_Node *node;
1069 chain->initial_length = current_length;
1070 chain->last_offset = chain->first_offset;
1071 for(node = chain->head; node; node = node->next)
1072 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1078 FLAC_API void FLAC__metadata_chain_merge_padding(FLAC__Metadata_Chain *chain)
1080 FLAC__Metadata_Node *node;
1082 FLAC__ASSERT(0 != chain);
1084 for(node = chain->head; node; ) {
1085 if(!chain_merge_adjacent_padding_(chain, node))
1090 FLAC_API void FLAC__metadata_chain_sort_padding(FLAC__Metadata_Chain *chain)
1092 FLAC__Metadata_Node *node, *save;
1095 FLAC__ASSERT(0 != chain);
1098 * Don't try and be too smart... this simple algo is good enough for
1099 * the small number of nodes that we deal with.
1101 for(i = 0, node = chain->head; i < chain->nodes; i++) {
1102 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1104 chain_remove_node_(chain, node);
1105 chain_append_node_(chain, node);
1113 FLAC__metadata_chain_merge_padding(chain);
1117 FLAC_API FLAC__Metadata_Iterator *FLAC__metadata_iterator_new()
1119 FLAC__Metadata_Iterator *iterator = (FLAC__Metadata_Iterator*)calloc(1, sizeof(FLAC__Metadata_Iterator));
1121 /* calloc() implies:
1122 iterator->current = 0;
1123 iterator->chain = 0;
1129 FLAC_API void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator)
1131 FLAC__ASSERT(0 != iterator);
1136 FLAC_API void FLAC__metadata_iterator_init(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Chain *chain)
1138 FLAC__ASSERT(0 != iterator);
1139 FLAC__ASSERT(0 != chain);
1140 FLAC__ASSERT(0 != chain->head);
1142 iterator->chain = chain;
1143 iterator->current = chain->head;
1146 FLAC_API FLAC__bool FLAC__metadata_iterator_next(FLAC__Metadata_Iterator *iterator)
1148 FLAC__ASSERT(0 != iterator);
1150 if(0 == iterator->current || 0 == iterator->current->next)
1153 iterator->current = iterator->current->next;
1157 FLAC_API FLAC__bool FLAC__metadata_iterator_prev(FLAC__Metadata_Iterator *iterator)
1159 FLAC__ASSERT(0 != iterator);
1161 if(0 == iterator->current || 0 == iterator->current->prev)
1164 iterator->current = iterator->current->prev;
1168 FLAC_API FLAC__MetadataType FLAC__metadata_iterator_get_block_type(const FLAC__Metadata_Iterator *iterator)
1170 FLAC__ASSERT(0 != iterator);
1171 FLAC__ASSERT(0 != iterator->current);
1172 FLAC__ASSERT(0 != iterator->current->data);
1174 return iterator->current->data->type;
1177 FLAC_API FLAC__StreamMetadata *FLAC__metadata_iterator_get_block(FLAC__Metadata_Iterator *iterator)
1179 FLAC__ASSERT(0 != iterator);
1180 FLAC__ASSERT(0 != iterator->current);
1182 return iterator->current->data;
1185 FLAC_API FLAC__bool FLAC__metadata_iterator_set_block(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1187 FLAC__ASSERT(0 != iterator);
1188 FLAC__ASSERT(0 != block);
1189 return FLAC__metadata_iterator_delete_block(iterator, false) && FLAC__metadata_iterator_insert_block_after(iterator, block);
1192 FLAC_API FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__Metadata_Iterator *iterator, FLAC__bool replace_with_padding)
1194 FLAC__Metadata_Node *save;
1196 FLAC__ASSERT(0 != iterator);
1197 FLAC__ASSERT(0 != iterator->current);
1199 if(0 == iterator->current->prev) {
1200 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1204 save = iterator->current->prev;
1206 if(replace_with_padding) {
1207 FLAC__metadata_object_delete_data(iterator->current->data);
1208 iterator->current->data->type = FLAC__METADATA_TYPE_PADDING;
1211 chain_delete_node_(iterator->chain, iterator->current);
1214 iterator->current = save;
1218 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1220 FLAC__Metadata_Node *node;
1222 FLAC__ASSERT(0 != iterator);
1223 FLAC__ASSERT(0 != iterator->current);
1224 FLAC__ASSERT(0 != block);
1226 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1229 if(0 == iterator->current->prev) {
1230 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1234 if(0 == (node = node_new_()))
1238 iterator_insert_node_(iterator, node);
1239 iterator->current = node;
1243 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1245 FLAC__Metadata_Node *node;
1247 FLAC__ASSERT(0 != iterator);
1248 FLAC__ASSERT(0 != iterator->current);
1249 FLAC__ASSERT(0 != block);
1251 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1254 if(0 == (node = node_new_()))
1258 iterator_insert_node_after_(iterator, node);
1259 iterator->current = node;
1264 /****************************************************************************
1266 * Local function definitions
1268 ***************************************************************************/
1270 void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1276 for(i = 0; i < bytes; i++) {
1277 *(--b) = (FLAC__byte)(val & 0xff);
1282 void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1286 for(i = 0; i < bytes; i++) {
1287 *(b++) = (FLAC__byte)(val & 0xff);
1292 void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes)
1298 for(i = 0; i < bytes; i++) {
1299 *(--b) = (FLAC__byte)(val & 0xff);
1304 FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes)
1306 FLAC__uint32 ret = 0;
1309 for(i = 0; i < bytes; i++)
1310 ret = (ret << 8) | (FLAC__uint32)(*b++);
1315 FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes)
1317 FLAC__uint32 ret = 0;
1322 for(i = 0; i < bytes; i++)
1323 ret = (ret << 8) | (FLAC__uint32)(*--b);
1328 FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes)
1330 FLAC__uint64 ret = 0;
1333 for(i = 0; i < bytes; i++)
1334 ret = (ret << 8) | (FLAC__uint64)(*b++);
1339 FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator)
1341 FLAC__byte raw_header[FLAC__STREAM_METADATA_HEADER_LENGTH];
1343 FLAC__ASSERT(0 != iterator);
1344 FLAC__ASSERT(0 != iterator->file);
1346 if(fread(raw_header, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, iterator->file) != FLAC__STREAM_METADATA_HEADER_LENGTH) {
1347 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1351 iterator->is_last = raw_header[0] & 0x80? true : false;
1352 iterator->type = (FLAC__MetadataType)(raw_header[0] & 0x7f);
1353 iterator->length = unpack_uint32_(raw_header + 1, 3);
1355 /* Note that we don't check:
1356 * if(iterator->type >= FLAC__METADATA_TYPE_UNDEFINED)
1357 * we just will read in an opaque block
1363 FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block)
1365 FLAC__ASSERT(0 != iterator);
1366 FLAC__ASSERT(0 != iterator->file);
1368 switch(block->type) {
1369 case FLAC__METADATA_TYPE_STREAMINFO:
1370 iterator->status = read_metadata_block_data_streaminfo_(iterator->file, &block->data.stream_info);
1372 case FLAC__METADATA_TYPE_PADDING:
1373 iterator->status = read_metadata_block_data_padding_(iterator->file, &block->data.padding, block->length);
1375 case FLAC__METADATA_TYPE_APPLICATION:
1376 iterator->status = read_metadata_block_data_application_(iterator->file, &block->data.application, block->length);
1378 case FLAC__METADATA_TYPE_SEEKTABLE:
1379 iterator->status = read_metadata_block_data_seektable_(iterator->file, &block->data.seek_table, block->length);
1381 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
1382 iterator->status = read_metadata_block_data_vorbis_comment_(iterator->file, &block->data.vorbis_comment);
1384 case FLAC__METADATA_TYPE_CUESHEET:
1385 iterator->status = read_metadata_block_data_cuesheet_(iterator->file, &block->data.cue_sheet);
1388 iterator->status = read_metadata_block_data_unknown_(iterator->file, &block->data.unknown, block->length);
1392 return (iterator->status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK);
1395 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_(FILE *file, FLAC__StreamMetadata_StreamInfo *block)
1397 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH], *b;
1399 FLAC__ASSERT(0 != file);
1401 if(fread(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, file) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
1402 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1406 /* @@@ we are using hardcoded numbers for simplicity but we should
1407 * probably eventually write a bit-level unpacker and use the
1408 * _STREAMINFO_ constants.
1410 block->min_blocksize = unpack_uint32_(b, 2); b += 2;
1411 block->max_blocksize = unpack_uint32_(b, 2); b += 2;
1412 block->min_framesize = unpack_uint32_(b, 3); b += 3;
1413 block->max_framesize = unpack_uint32_(b, 3); b += 3;
1414 block->sample_rate = (unpack_uint32_(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4);
1415 block->channels = (unsigned)((b[2] & 0x0e) >> 1) + 1;
1416 block->bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 4) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1;
1417 block->total_samples = (((FLAC__uint64)(b[3] & 0x0f)) << 32) | unpack_uint64_(b+4, 4);
1418 memcpy(block->md5sum, b+8, 16);
1420 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1424 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_(FILE *file, FLAC__StreamMetadata_Padding *block, unsigned block_length)
1426 FLAC__ASSERT(0 != file);
1428 (void)block; /* nothing to do; we don't care about reading the padding bytes */
1430 if(0 != fseek(file, block_length, SEEK_CUR))
1431 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
1433 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1436 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_(FILE *file, FLAC__StreamMetadata_Application *block, unsigned block_length)
1438 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
1440 FLAC__ASSERT(0 != file);
1442 if(fread(block->id, 1, id_bytes, file) != id_bytes)
1443 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1445 block_length -= id_bytes;
1447 if(block_length == 0) {
1451 if(0 == (block->data = (FLAC__byte*)malloc(block_length)))
1452 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1454 if(fread(block->data, 1, block_length, file) != block_length)
1455 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1458 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1461 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_(FILE *file, FLAC__StreamMetadata_SeekTable *block, unsigned block_length)
1464 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
1466 FLAC__ASSERT(0 != file);
1467 FLAC__ASSERT(block_length % FLAC__STREAM_METADATA_SEEKPOINT_LENGTH == 0);
1469 block->num_points = block_length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
1471 if(block->num_points == 0)
1473 else if(0 == (block->points = (FLAC__StreamMetadata_SeekPoint*)malloc(block->num_points * sizeof(FLAC__StreamMetadata_SeekPoint))))
1474 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1476 for(i = 0; i < block->num_points; i++) {
1477 if(fread(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, file) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
1478 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1479 /*@@@ some MAGIC NUMBERs here */
1480 block->points[i].sample_number = unpack_uint64_(buffer, 8);
1481 block->points[i].stream_offset = unpack_uint64_(buffer+8, 8);
1482 block->points[i].frame_samples = unpack_uint32_(buffer+16, 2);
1485 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1488 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_(FILE *file, FLAC__StreamMetadata_VorbisComment_Entry *entry)
1490 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
1491 FLAC__byte buffer[4]; /* magic number is asserted below */
1493 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8 == 4);
1494 FLAC__ASSERT(0 != file);
1496 if(fread(buffer, 1, entry_length_len, file) != entry_length_len)
1497 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1498 entry->length = unpack_uint32_little_endian_(buffer, entry_length_len);
1500 if(0 != entry->entry)
1503 if(entry->length == 0) {
1507 if(0 == (entry->entry = (FLAC__byte*)malloc(entry->length)))
1508 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1510 if(fread(entry->entry, 1, entry->length, file) != entry->length)
1511 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1514 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1517 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_(FILE *file, FLAC__StreamMetadata_VorbisComment *block)
1520 FLAC__Metadata_SimpleIteratorStatus status;
1521 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
1522 FLAC__byte buffer[4]; /* magic number is asserted below */
1524 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8 == 4);
1525 FLAC__ASSERT(0 != file);
1527 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_(file, &(block->vendor_string))))
1530 if(fread(buffer, 1, num_comments_len, file) != num_comments_len)
1531 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1532 block->num_comments = unpack_uint32_little_endian_(buffer, num_comments_len);
1534 if(block->num_comments == 0) {
1535 block->comments = 0;
1537 else if(0 == (block->comments = (FLAC__StreamMetadata_VorbisComment_Entry*)calloc(block->num_comments, sizeof(FLAC__StreamMetadata_VorbisComment_Entry))))
1538 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1540 for(i = 0; i < block->num_comments; i++) {
1541 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_(file, block->comments + i)))
1545 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1548 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_(FILE *file, FLAC__StreamMetadata_CueSheet_Track *track)
1551 FLAC__byte buffer[32]; /* asserted below that this is big enough */
1553 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
1554 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
1555 FLAC__ASSERT(sizeof(buffer) >= (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8);
1557 FLAC__ASSERT(0 != file);
1559 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
1560 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
1561 if(fread(buffer, 1, len, file) != len)
1562 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1563 track->offset = unpack_uint64_(buffer, len);
1565 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
1566 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
1567 if(fread(buffer, 1, len, file) != len)
1568 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1569 track->number = (FLAC__byte)unpack_uint32_(buffer, len);
1571 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
1572 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
1573 if(fread(track->isrc, 1, len, file) != len)
1574 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1576 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) % 8 == 0);
1577 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
1578 if(fread(buffer, 1, len, file) != len)
1579 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1580 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN == 1);
1581 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN == 1);
1582 track->type = buffer[0] >> 7;
1583 track->pre_emphasis = (buffer[0] >> 6) & 1;
1585 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
1586 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
1587 if(fread(buffer, 1, len, file) != len)
1588 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1589 track->num_indices = (FLAC__byte)unpack_uint32_(buffer, len);
1591 if(track->num_indices == 0) {
1594 else if(0 == (track->indices = (FLAC__StreamMetadata_CueSheet_Index*)calloc(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index))))
1595 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1597 for(i = 0; i < track->num_indices; i++) {
1598 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
1599 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
1600 if(fread(buffer, 1, len, file) != len)
1601 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1602 track->indices[i].offset = unpack_uint64_(buffer, len);
1604 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
1605 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
1606 if(fread(buffer, 1, len, file) != len)
1607 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1608 track->indices[i].number = (FLAC__byte)unpack_uint32_(buffer, len);
1610 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
1611 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
1612 if(fread(buffer, 1, len, file) != len)
1613 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1616 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1619 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_(FILE *file, FLAC__StreamMetadata_CueSheet *block)
1622 FLAC__Metadata_SimpleIteratorStatus status;
1623 FLAC__byte buffer[1024]; /* MSVC needs a constant expression so we put a magic number and assert */
1625 FLAC__ASSERT(0 != file);
1626 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN)/8 <= sizeof(buffer));
1627 FLAC__ASSERT(sizeof(FLAC__uint64) <= sizeof(buffer));
1629 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
1630 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
1631 if(fread(block->media_catalog_number, 1, len, file) != len)
1632 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1634 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
1635 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
1636 if(fread(buffer, 1, len, file) != len)
1637 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1638 block->lead_in = unpack_uint64_(buffer, len);
1640 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
1641 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
1642 if(fread(buffer, 1, len, file) != len)
1643 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1644 block->is_cd = buffer[0]&0x80? true : false;
1646 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
1647 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
1648 if(fread(buffer, 1, len, file) != len)
1649 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1650 block->num_tracks = unpack_uint32_(buffer, len);
1652 if(block->num_tracks == 0) {
1655 else if(0 == (block->tracks = (FLAC__StreamMetadata_CueSheet_Track*)calloc(block->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track))))
1656 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1658 for(i = 0; i < block->num_tracks; i++) {
1659 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_cuesheet_track_(file, block->tracks + i)))
1663 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1666 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_unknown_(FILE *file, FLAC__StreamMetadata_Unknown *block, unsigned block_length)
1668 FLAC__ASSERT(0 != file);
1670 if(block_length == 0) {
1674 if(0 == (block->data = (FLAC__byte*)malloc(block_length)))
1675 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
1677 if(fread(block->data, 1, block_length, file) != block_length)
1678 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
1681 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1684 FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
1686 FLAC__byte buffer[FLAC__STREAM_METADATA_HEADER_LENGTH];
1688 FLAC__ASSERT(0 != file);
1689 FLAC__ASSERT(0 != status);
1690 FLAC__ASSERT(block->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
1692 buffer[0] = (block->is_last? 0x80 : 0) | (FLAC__byte)block->type;
1693 pack_uint32_(block->length, buffer + 1, 3);
1695 if(local__fwrite(buffer, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, file) != FLAC__STREAM_METADATA_HEADER_LENGTH) {
1696 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1703 FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
1705 FLAC__ASSERT(0 != file);
1706 FLAC__ASSERT(0 != status);
1708 switch(block->type) {
1709 case FLAC__METADATA_TYPE_STREAMINFO:
1710 *status = write_metadata_block_data_streaminfo_(file, &block->data.stream_info);
1712 case FLAC__METADATA_TYPE_PADDING:
1713 *status = write_metadata_block_data_padding_(file, &block->data.padding, block->length);
1715 case FLAC__METADATA_TYPE_APPLICATION:
1716 *status = write_metadata_block_data_application_(file, &block->data.application, block->length);
1718 case FLAC__METADATA_TYPE_SEEKTABLE:
1719 *status = write_metadata_block_data_seektable_(file, &block->data.seek_table);
1721 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
1722 *status = write_metadata_block_data_vorbis_comment_(file, &block->data.vorbis_comment);
1724 case FLAC__METADATA_TYPE_CUESHEET:
1725 *status = write_metadata_block_data_cuesheet_(file, &block->data.cue_sheet);
1728 *status = write_metadata_block_data_unknown_(file, &block->data.unknown, block->length);
1731 return (*status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK);
1734 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_streaminfo_(FILE *file, const FLAC__StreamMetadata_StreamInfo *block)
1736 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH];
1737 const unsigned channels1 = block->channels - 1;
1738 const unsigned bps1 = block->bits_per_sample - 1;
1740 FLAC__ASSERT(0 != file);
1742 /* @@@ we are using hardcoded numbers for simplicity but we should
1743 * probably eventually write a bit-level packer and use the
1744 * _STREAMINFO_ constants.
1746 pack_uint32_(block->min_blocksize, buffer, 2);
1747 pack_uint32_(block->max_blocksize, buffer+2, 2);
1748 pack_uint32_(block->min_framesize, buffer+4, 3);
1749 pack_uint32_(block->max_framesize, buffer+7, 3);
1750 buffer[10] = (block->sample_rate >> 12) & 0xff;
1751 buffer[11] = (block->sample_rate >> 4) & 0xff;
1752 buffer[12] = ((block->sample_rate & 0x0f) << 4) | (channels1 << 1) | (bps1 >> 4);
1753 buffer[13] = (FLAC__byte)(((bps1 & 0x0f) << 4) | ((block->total_samples >> 32) & 0x0f));
1754 pack_uint32_((FLAC__uint32)block->total_samples, buffer+14, 4);
1755 memcpy(buffer+18, block->md5sum, 16);
1757 if(local__fwrite(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, file) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
1758 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1760 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1763 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_padding_(FILE *file, const FLAC__StreamMetadata_Padding *block, unsigned block_length)
1765 unsigned i, n = block_length;
1766 FLAC__byte buffer[1024];
1768 FLAC__ASSERT(0 != file);
1772 memset(buffer, 0, 1024);
1774 for(i = 0; i < n/1024; i++)
1775 if(local__fwrite(buffer, 1, 1024, file) != 1024)
1776 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1780 if(local__fwrite(buffer, 1, n, file) != n)
1781 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1783 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1786 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_application_(FILE *file, const FLAC__StreamMetadata_Application *block, unsigned block_length)
1788 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
1790 FLAC__ASSERT(0 != file);
1792 if(local__fwrite(block->id, 1, id_bytes, file) != id_bytes)
1793 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1795 block_length -= id_bytes;
1797 if(local__fwrite(block->data, 1, block_length, file) != block_length)
1798 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1800 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1803 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_seektable_(FILE *file, const FLAC__StreamMetadata_SeekTable *block)
1806 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
1808 FLAC__ASSERT(0 != file);
1810 for(i = 0; i < block->num_points; i++) {
1811 /*@@@ some MAGIC NUMBERs here */
1812 pack_uint64_(block->points[i].sample_number, buffer, 8);
1813 pack_uint64_(block->points[i].stream_offset, buffer+8, 8);
1814 pack_uint32_(block->points[i].frame_samples, buffer+16, 2);
1815 if(local__fwrite(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, file) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
1816 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1819 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1822 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_vorbis_comment_(FILE *file, const FLAC__StreamMetadata_VorbisComment *block)
1825 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
1826 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
1827 FLAC__byte buffer[4]; /* magic number is asserted below */
1829 FLAC__ASSERT(max(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN, FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8 == 4);
1830 FLAC__ASSERT(0 != file);
1832 pack_uint32_little_endian_(block->vendor_string.length, buffer, entry_length_len);
1833 if(local__fwrite(buffer, 1, entry_length_len, file) != entry_length_len)
1834 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1835 if(local__fwrite(block->vendor_string.entry, 1, block->vendor_string.length, file) != block->vendor_string.length)
1836 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1838 pack_uint32_little_endian_(block->num_comments, buffer, num_comments_len);
1839 if(local__fwrite(buffer, 1, num_comments_len, file) != num_comments_len)
1840 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1842 for(i = 0; i < block->num_comments; i++) {
1843 pack_uint32_little_endian_(block->comments[i].length, buffer, entry_length_len);
1844 if(local__fwrite(buffer, 1, entry_length_len, file) != entry_length_len)
1845 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1846 if(local__fwrite(block->comments[i].entry, 1, block->comments[i].length, file) != block->comments[i].length)
1847 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1850 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1853 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_cuesheet_(FILE *file, const FLAC__StreamMetadata_CueSheet *block)
1856 FLAC__byte buffer[1024]; /* asserted below that this is big enough */
1858 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
1859 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN/8);
1860 FLAC__ASSERT(sizeof(buffer) >= (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN)/8);
1861 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
1863 FLAC__ASSERT(0 != file);
1865 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
1866 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
1867 if(local__fwrite(block->media_catalog_number, 1, len, file) != len)
1868 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1870 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
1871 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
1872 pack_uint64_(block->lead_in, buffer, len);
1873 if(local__fwrite(buffer, 1, len, file) != len)
1874 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1876 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
1877 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
1878 memset(buffer, 0, len);
1881 if(local__fwrite(buffer, 1, len, file) != len)
1882 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1884 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
1885 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
1886 pack_uint32_(block->num_tracks, buffer, len);
1887 if(local__fwrite(buffer, 1, len, file) != len)
1888 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1890 for(i = 0; i < block->num_tracks; i++) {
1891 FLAC__StreamMetadata_CueSheet_Track *track = block->tracks + i;
1893 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
1894 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
1895 pack_uint64_(track->offset, buffer, len);
1896 if(local__fwrite(buffer, 1, len, file) != len)
1897 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1899 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
1900 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
1901 pack_uint32_(track->number, buffer, len);
1902 if(local__fwrite(buffer, 1, len, file) != len)
1903 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1905 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
1906 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
1907 if(local__fwrite(track->isrc, 1, len, file) != len)
1908 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1910 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) % 8 == 0);
1911 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
1912 memset(buffer, 0, len);
1913 buffer[0] = (track->type << 7) | (track->pre_emphasis << 6);
1914 if(local__fwrite(buffer, 1, len, file) != len)
1915 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1917 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
1918 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
1919 pack_uint32_(track->num_indices, buffer, len);
1920 if(local__fwrite(buffer, 1, len, file) != len)
1921 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1923 for(j = 0; j < track->num_indices; j++) {
1924 FLAC__StreamMetadata_CueSheet_Index *index = track->indices + j;
1926 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
1927 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
1928 pack_uint64_(index->offset, buffer, len);
1929 if(local__fwrite(buffer, 1, len, file) != len)
1930 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1932 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
1933 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
1934 pack_uint32_(index->number, buffer, len);
1935 if(local__fwrite(buffer, 1, len, file) != len)
1936 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1938 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
1939 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
1940 memset(buffer, 0, len);
1941 if(local__fwrite(buffer, 1, len, file) != len)
1942 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1946 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1949 FLAC__Metadata_SimpleIteratorStatus write_metadata_block_data_unknown_(FILE *file, const FLAC__StreamMetadata_Unknown *block, unsigned block_length)
1951 FLAC__ASSERT(0 != file);
1953 if(local__fwrite(block->data, 1, block_length, file) != block_length)
1954 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
1956 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
1959 FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block)
1961 if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
1962 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
1966 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
1969 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
1972 if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
1973 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
1977 return read_metadata_block_header_(iterator);
1980 FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last)
1982 FLAC__StreamMetadata *padding;
1984 if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
1985 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
1989 block->is_last = false;
1991 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
1994 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
1997 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
1998 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2000 padding->is_last = padding_is_last;
2001 padding->length = padding_length;
2003 if(!write_metadata_block_header_(iterator->file, &iterator->status, padding)) {
2004 FLAC__metadata_object_delete(padding);
2008 if(!write_metadata_block_data_(iterator->file, &iterator->status, padding)) {
2009 FLAC__metadata_object_delete(padding);
2013 FLAC__metadata_object_delete(padding);
2015 if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2016 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2020 return read_metadata_block_header_(iterator);
2023 FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append)
2027 int fixup_is_last_code = 0; /* 0 => no need to change any is_last flags */
2028 long fixup_is_last_flag_offset = -1;
2030 FLAC__ASSERT(0 != block || append == false);
2032 if(iterator->is_last) {
2034 fixup_is_last_code = 1; /* 1 => clear the is_last flag at the following offset */
2035 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2037 else if(0 == block) {
2038 simple_iterator_push_(iterator);
2039 if(!FLAC__metadata_simple_iterator_prev(iterator)) {
2040 (void)simple_iterator_pop_(iterator);
2043 fixup_is_last_code = -1; /* -1 => set the is_last the flag at the following offset */
2044 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2045 if(!simple_iterator_pop_(iterator))
2050 if(!simple_iterator_copy_file_prefix_(iterator, &tempfile, &tempfilename, append))
2054 if(!write_metadata_block_header_(tempfile, &iterator->status, block)) {
2055 cleanup_tempfile_(&tempfile, &tempfilename);
2059 if(!write_metadata_block_data_(tempfile, &iterator->status, block)) {
2060 cleanup_tempfile_(&tempfile, &tempfilename);
2065 if(!simple_iterator_copy_file_postfix_(iterator, &tempfile, &tempfilename, fixup_is_last_code, fixup_is_last_flag_offset, block==0))
2069 return FLAC__metadata_simple_iterator_next(iterator);
2074 FLAC__bool chain_rewrite_chain_(FLAC__Metadata_Chain *chain)
2077 FLAC__Metadata_Node *node;
2078 FLAC__Metadata_SimpleIteratorStatus status;
2080 FLAC__ASSERT(0 != chain);
2081 FLAC__ASSERT(0 != chain->filename);
2082 FLAC__ASSERT(0 != chain->head);
2084 if(0 == (f = fopen(chain->filename, "r+b"))) {
2085 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
2088 if(0 != fseek(f, chain->first_offset, SEEK_SET)) {
2089 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
2093 for(node = chain->head; node; node = node->next) {
2094 if(!write_metadata_block_header_(f, &status, node->data)) {
2095 chain->status = get_equivalent_status_(status);
2098 if(!write_metadata_block_data_(f, &status, node->data)) {
2099 chain->status = get_equivalent_status_(status);
2104 /*FLAC__ASSERT(fflush(), ftell() == chain->last_offset);*/
2111 FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix)
2115 FLAC__Metadata_SimpleIteratorStatus status;
2116 const FLAC__Metadata_Node *node;
2118 FLAC__ASSERT(0 != chain);
2119 FLAC__ASSERT(0 != chain->filename);
2120 FLAC__ASSERT(0 != chain->head);
2122 /* copy the file prefix (data up to first metadata block */
2123 if(0 == (f = fopen(chain->filename, "rb"))) {
2124 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
2127 if(!open_tempfile_(chain->filename, tempfile_path_prefix, &tempfile, &tempfilename, &status)) {
2128 chain->status = get_equivalent_status_(status);
2129 cleanup_tempfile_(&tempfile, &tempfilename);
2132 if(!copy_n_bytes_from_file_(f, tempfile, chain->first_offset, &status)) {
2133 chain->status = get_equivalent_status_(status);
2134 cleanup_tempfile_(&tempfile, &tempfilename);
2138 /* write the metadata */
2139 for(node = chain->head; node; node = node->next) {
2140 if(!write_metadata_block_header_(tempfile, &status, node->data)) {
2141 chain->status = get_equivalent_status_(status);
2144 if(!write_metadata_block_data_(tempfile, &status, node->data)) {
2145 chain->status = get_equivalent_status_(status);
2149 /*FLAC__ASSERT(fflush(), ftell() == chain->last_offset);*/
2151 /* copy the file postfix (everything after the metadata) */
2152 if(0 != fseek(f, chain->last_offset, SEEK_SET)) {
2153 cleanup_tempfile_(&tempfile, &tempfilename);
2154 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
2157 if(!copy_remaining_bytes_from_file_(f, tempfile, &status)) {
2158 cleanup_tempfile_(&tempfile, &tempfilename);
2159 chain->status = get_equivalent_status_(status);
2163 /* move the tempfile on top of the original */
2165 if(!transport_tempfile_(chain->filename, &tempfile, &tempfilename, &status))
2171 void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator)
2173 FLAC__ASSERT(iterator->depth+1 < SIMPLE_ITERATOR_MAX_PUSH_DEPTH);
2174 iterator->offset[iterator->depth+1] = iterator->offset[iterator->depth];
2178 FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator)
2180 FLAC__ASSERT(iterator->depth > 0);
2182 if(0 != fseek(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2183 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2187 return read_metadata_block_header_(iterator);
2190 unsigned seek_to_first_metadata_block_(FILE *f)
2192 FLAC__byte buffer[4];
2196 FLAC__ASSERT(0 != f);
2197 FLAC__ASSERT(FLAC__STREAM_SYNC_LENGTH == 4);
2199 /* skip any id3v2 tag */
2200 #if !defined _MSC_VER && !defined __MINGW32__
2201 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
2204 n = fread(buffer, 1, 4, f);
2205 #if !defined _MSC_VER && !defined __MINGW32__
2206 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
2213 else if(0 == memcmp(buffer, "ID3", 3)) {
2214 unsigned tag_length = 0;
2216 /* skip to the tag length */
2217 if(fseek(f, 2, SEEK_CUR) < 0)
2220 /* read the length */
2221 for(i = 0; i < 4; i++) {
2222 if(fread(buffer, 1, 1, f) < 1 || buffer[0] & 0x80)
2225 tag_length |= (buffer[0] & 0x7f);
2228 /* skip the rest of the tag */
2229 if(fseek(f, tag_length, SEEK_CUR) < 0)
2232 /* read the stream sync code */
2233 #if !defined _MSC_VER && !defined __MINGW32__
2234 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
2237 n = fread(buffer, 1, 4, f);
2238 #if !defined _MSC_VER && !defined __MINGW32__
2239 /*@@@ don't know how to resolve errno without using LIBC.LIB; must use MSVCRT.LIB only for plugins */
2248 /* check for the fLaC signature */
2249 if(0 == memcmp(FLAC__STREAM_SYNC_STRING, buffer, FLAC__STREAM_SYNC_LENGTH))
2255 FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append)
2257 const long offset_end = append? iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length : iterator->offset[iterator->depth];
2259 if(0 != fseek(iterator->file, 0, SEEK_SET)) {
2260 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2263 if(!open_tempfile_(iterator->filename, iterator->tempfile_path_prefix, tempfile, tempfilename, &iterator->status)) {
2264 cleanup_tempfile_(tempfile, tempfilename);
2267 if(!copy_n_bytes_from_file_(iterator->file, *tempfile, offset_end, &iterator->status)) {
2268 cleanup_tempfile_(tempfile, tempfilename);
2275 FLAC__bool simple_iterator_copy_file_postfix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, int fixup_is_last_code, long fixup_is_last_flag_offset, FLAC__bool backup)
2277 long save_offset = iterator->offset[iterator->depth]; /*@@@ 2G limit */
2278 FLAC__ASSERT(0 != *tempfile);
2280 if(0 != fseek(iterator->file, save_offset + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length, SEEK_SET)) {
2281 cleanup_tempfile_(tempfile, tempfilename);
2282 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2285 if(!copy_remaining_bytes_from_file_(iterator->file, *tempfile, &iterator->status)) {
2286 cleanup_tempfile_(tempfile, tempfilename);
2290 if(fixup_is_last_code != 0) {
2292 * if code == 1, it means a block was appended to the end so
2293 * we have to clear the is_last flag of the previous block
2294 * if code == -1, it means the last block was deleted so
2295 * we have to set the is_last flag of the previous block
2297 /*@@@ MAGIC NUMBERs here; we know the is_last flag is the high bit of the byte at this location */
2299 if(0 != fseek(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
2300 cleanup_tempfile_(tempfile, tempfilename);
2301 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2304 if(fread(&x, 1, 1, *tempfile) != 1) {
2305 cleanup_tempfile_(tempfile, tempfilename);
2306 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2309 if(fixup_is_last_code > 0) {
2310 FLAC__ASSERT(x & 0x80);
2314 FLAC__ASSERT(!(x & 0x80));
2317 if(0 != fseek(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
2318 cleanup_tempfile_(tempfile, tempfilename);
2319 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2322 if(local__fwrite(&x, 1, 1, *tempfile) != 1) {
2323 cleanup_tempfile_(tempfile, tempfilename);
2324 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2329 (void)fclose(iterator->file);
2331 if(!transport_tempfile_(iterator->filename, tempfile, tempfilename, &iterator->status))
2334 if(iterator->has_stats)
2335 set_file_stats_(iterator->filename, &iterator->stats);
2337 if(!simple_iterator_prime_input_(iterator, !iterator->is_writable))
2340 while(iterator->offset[iterator->depth] + (long)FLAC__STREAM_METADATA_HEADER_LENGTH + (long)iterator->length < save_offset)
2341 if(!FLAC__metadata_simple_iterator_next(iterator))
2346 /* move the iterator to it's original block faster by faking a push, then doing a pop_ */
2347 FLAC__ASSERT(iterator->depth == 0);
2348 iterator->offset[0] = save_offset;
2350 return simple_iterator_pop_(iterator);
2354 FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, unsigned bytes/*@@@ 4G limit*/, FLAC__Metadata_SimpleIteratorStatus *status)
2356 FLAC__byte buffer[8192];
2360 n = min(sizeof(buffer), bytes);
2361 if(fread(buffer, 1, n, file) != n) {
2362 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2365 if(local__fwrite(buffer, 1, n, tempfile) != n) {
2366 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2375 FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status)
2377 FLAC__byte buffer[8192];
2380 while(!feof(file)) {
2381 n = fread(buffer, 1, sizeof(buffer), file);
2382 if(n == 0 && !feof(file)) {
2383 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2386 if(n > 0 && local__fwrite(buffer, 1, n, tempfile) != n) {
2387 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2395 FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
2397 static const char *tempfile_suffix = ".metadata_edit";
2398 if(0 == tempfile_path_prefix) {
2399 if(0 == (*tempfilename = (char*)malloc(strlen(filename) + strlen(tempfile_suffix) + 1))) {
2400 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2403 strcpy(*tempfilename, filename);
2404 strcat(*tempfilename, tempfile_suffix);
2407 const char *p = strrchr(filename, '/');
2413 if(0 == (*tempfilename = (char*)malloc(strlen(tempfile_path_prefix) + 1 + strlen(p) + strlen(tempfile_suffix) + 1))) {
2414 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2417 strcpy(*tempfilename, tempfile_path_prefix);
2418 strcat(*tempfilename, "/");
2419 strcat(*tempfilename, p);
2420 strcat(*tempfilename, tempfile_suffix);
2423 if(0 == (*tempfile = fopen(*tempfilename, "w+b"))) {
2424 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
2431 FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
2433 FLAC__ASSERT(0 != filename);
2434 FLAC__ASSERT(0 != tempfile);
2435 FLAC__ASSERT(0 != *tempfile);
2436 FLAC__ASSERT(0 != tempfilename);
2437 FLAC__ASSERT(0 != *tempfilename);
2438 FLAC__ASSERT(0 != status);
2440 (void)fclose(*tempfile);
2443 #if defined _MSC_VER || defined __MINGW32__
2444 if(unlink(filename) < 0) {
2445 cleanup_tempfile_(tempfile, tempfilename);
2446 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR;
2451 /*@@@ to fully support the tempfile_path_prefix we need to update this piece to actually copy across filesystems instead of just rename(): */
2452 if(0 != rename(*tempfilename, filename)) {
2453 cleanup_tempfile_(tempfile, tempfilename);
2454 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR;
2458 cleanup_tempfile_(tempfile, tempfilename);
2463 void cleanup_tempfile_(FILE **tempfile, char **tempfilename)
2465 if(0 != *tempfile) {
2466 (void)fclose(*tempfile);
2470 if(0 != *tempfilename) {
2471 (void)unlink(*tempfilename);
2472 free(*tempfilename);
2477 FLAC__bool get_file_stats_(const char *filename, struct stat *stats)
2479 FLAC__ASSERT(0 != filename);
2480 FLAC__ASSERT(0 != stats);
2481 return (0 == stat(filename, stats));
2484 void set_file_stats_(const char *filename, struct stat *stats)
2486 struct utimbuf srctime;
2488 FLAC__ASSERT(0 != filename);
2489 FLAC__ASSERT(0 != stats);
2491 srctime.actime = stats->st_atime;
2492 srctime.modtime = stats->st_mtime;
2493 (void)chmod(filename, stats->st_mode);
2494 (void)utime(filename, &srctime);
2495 #if !defined _MSC_VER && !defined __MINGW32__
2496 (void)chown(filename, stats->st_uid, -1);
2497 (void)chown(filename, -1, stats->st_gid);
2501 FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status)
2504 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK:
2505 return FLAC__METADATA_CHAIN_STATUS_OK;
2506 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT:
2507 return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT;
2508 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE:
2509 return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
2510 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE:
2511 return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
2512 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE:
2513 return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE;
2514 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA:
2515 return FLAC__METADATA_CHAIN_STATUS_BAD_METADATA;
2516 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR:
2517 return FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
2518 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR:
2519 return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
2520 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR:
2521 return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
2522 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR:
2523 return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR;
2524 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR:
2525 return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR;
2526 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR:
2527 return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
2528 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR:
2530 return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;