1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2001-2009 Josh Coalson
3 * Copyright (C) 2011-2013 Xiph.Org Foundation
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * - Neither the name of the Xiph.org Foundation nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43 #include <sys/stat.h> /* for stat(), maybe chmod() */
45 #include "private/metadata.h"
47 #include "FLAC/assert.h"
48 #include "FLAC/stream_decoder.h"
49 #include "share/alloc.h"
50 #include "share/compat.h"
51 #include "share/macros.h"
52 #include "share/safe_str.h"
53 #include "private/macros.h"
54 #include "private/memory.h"
56 /* Alias the first (in share/alloc.h) to the second (in src/libFLAC/memory.c). */
57 #define safe_malloc_mul_2op_ safe_malloc_mul_2op_p
59 /****************************************************************************
61 * Local function declarations
63 ***************************************************************************/
65 static void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
66 static void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
67 static void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes);
68 static FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes);
69 static FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes);
70 static FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes);
72 static FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator);
73 static FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block);
74 static FLAC__bool read_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__bool *is_last, FLAC__MetadataType *type, unsigned *length);
75 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata *block);
76 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block);
77 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_Padding *block, unsigned block_length);
78 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Application *block, unsigned block_length);
79 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_SeekTable *block, unsigned block_length);
80 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment_Entry *entry);
81 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment *block);
82 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track);
83 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block);
84 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block);
85 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Unknown *block, unsigned block_length);
87 static FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
88 static FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
89 static FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
90 static FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
91 static FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block);
92 static FLAC__bool write_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Padding *block, unsigned block_length);
93 static FLAC__bool write_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Application *block, unsigned block_length);
94 static FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block);
95 static FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block);
96 static FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block);
97 static FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block);
98 static FLAC__bool write_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Unknown *block, unsigned block_length);
100 static FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block);
101 static FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last);
102 static FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append);
104 static void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator);
105 static FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator);
107 static unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb);
108 static unsigned seek_to_first_metadata_block_(FILE *f);
110 static FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append);
111 static FLAC__bool simple_iterator_copy_file_postfix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, int fixup_is_last_code, FLAC__off_t fixup_is_last_flag_offset, FLAC__bool backup);
113 static FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status);
114 static FLAC__bool copy_n_bytes_from_file_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOHandle temp_handle, FLAC__IOCallback_Write temp_write_cb, FLAC__off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status);
115 static FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status);
116 static FLAC__bool copy_remaining_bytes_from_file_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Eof eof_cb, FLAC__IOHandle temp_handle, FLAC__IOCallback_Write temp_write_cb, FLAC__Metadata_SimpleIteratorStatus *status);
118 static FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
119 static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
120 static void cleanup_tempfile_(FILE **tempfile, char **tempfilename);
122 static FLAC__bool get_file_stats_(const char *filename, struct flac_stat_s *stats);
123 static void set_file_stats_(const char *filename, struct flac_stat_s *stats);
125 static int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence);
126 static FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle);
128 static FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status);
131 #ifdef FLAC__VALGRIND_TESTING
132 static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
134 size_t ret = fwrite(ptr, size, nmemb, stream);
140 #define local__fwrite fwrite
143 /****************************************************************************
145 * Level 0 implementation
147 ***************************************************************************/
149 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
150 static void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
151 static void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
154 FLAC__bool got_error;
155 FLAC__StreamMetadata *object;
156 } level0_client_data;
158 static FLAC__StreamMetadata *get_one_metadata_block_(const char *filename, FLAC__MetadataType type)
160 level0_client_data cd;
161 FLAC__StreamDecoder *decoder;
163 FLAC__ASSERT(0 != filename);
165 cd.got_error = false;
168 decoder = FLAC__stream_decoder_new();
173 FLAC__stream_decoder_set_md5_checking(decoder, false);
174 FLAC__stream_decoder_set_metadata_ignore_all(decoder);
175 FLAC__stream_decoder_set_metadata_respond(decoder, type);
177 if(FLAC__stream_decoder_init_file(decoder, filename, write_callback_, metadata_callback_, error_callback_, &cd) != FLAC__STREAM_DECODER_INIT_STATUS_OK || cd.got_error) {
178 (void)FLAC__stream_decoder_finish(decoder);
179 FLAC__stream_decoder_delete(decoder);
183 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder) || cd.got_error) {
184 (void)FLAC__stream_decoder_finish(decoder);
185 FLAC__stream_decoder_delete(decoder);
187 FLAC__metadata_object_delete(cd.object);
191 (void)FLAC__stream_decoder_finish(decoder);
192 FLAC__stream_decoder_delete(decoder);
197 FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo)
199 FLAC__StreamMetadata *object;
201 FLAC__ASSERT(0 != filename);
202 FLAC__ASSERT(0 != streaminfo);
204 object = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_STREAMINFO);
207 /* can just copy the contents since STREAMINFO has no internal structure */
208 *streaminfo = *object;
209 FLAC__metadata_object_delete(object);
217 FLAC_API FLAC__bool FLAC__metadata_get_tags(const char *filename, FLAC__StreamMetadata **tags)
219 FLAC__ASSERT(0 != filename);
220 FLAC__ASSERT(0 != tags);
222 *tags = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_VORBIS_COMMENT);
227 FLAC_API FLAC__bool FLAC__metadata_get_cuesheet(const char *filename, FLAC__StreamMetadata **cuesheet)
229 FLAC__ASSERT(0 != filename);
230 FLAC__ASSERT(0 != cuesheet);
232 *cuesheet = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_CUESHEET);
234 return 0 != *cuesheet;
237 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
239 (void)decoder, (void)frame, (void)buffer, (void)client_data;
241 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
244 void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
246 level0_client_data *cd = (level0_client_data *)client_data;
250 * we assume we only get here when the one metadata block we were
251 * looking for was passed to us
253 if(!cd->got_error && 0 == cd->object) {
254 if(0 == (cd->object = FLAC__metadata_object_clone(metadata)))
255 cd->got_error = true;
259 void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
261 level0_client_data *cd = (level0_client_data *)client_data;
264 if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
265 cd->got_error = true;
268 FLAC_API FLAC__bool FLAC__metadata_get_picture(const char *filename, FLAC__StreamMetadata **picture, FLAC__StreamMetadata_Picture_Type type, const char *mime_type, const FLAC__byte *description, unsigned max_width, unsigned max_height, unsigned max_depth, unsigned max_colors)
270 FLAC__Metadata_SimpleIterator *it;
271 FLAC__uint64 max_area_seen = 0;
272 FLAC__uint64 max_depth_seen = 0;
274 FLAC__ASSERT(0 != filename);
275 FLAC__ASSERT(0 != picture);
279 it = FLAC__metadata_simple_iterator_new();
282 if(!FLAC__metadata_simple_iterator_init(it, filename, /*read_only=*/true, /*preserve_file_stats=*/true)) {
283 FLAC__metadata_simple_iterator_delete(it);
287 if(FLAC__metadata_simple_iterator_get_block_type(it) == FLAC__METADATA_TYPE_PICTURE) {
288 FLAC__StreamMetadata *obj = FLAC__metadata_simple_iterator_get_block(it);
289 FLAC__uint64 area = (FLAC__uint64)obj->data.picture.width * (FLAC__uint64)obj->data.picture.height;
290 /* check constraints */
292 (type == (FLAC__StreamMetadata_Picture_Type)(-1) || type == obj->data.picture.type) &&
293 (mime_type == 0 || !strcmp(mime_type, obj->data.picture.mime_type)) &&
294 (description == 0 || !strcmp((const char *)description, (const char *)obj->data.picture.description)) &&
295 obj->data.picture.width <= max_width &&
296 obj->data.picture.height <= max_height &&
297 obj->data.picture.depth <= max_depth &&
298 obj->data.picture.colors <= max_colors &&
299 (area > max_area_seen || (area == max_area_seen && obj->data.picture.depth > max_depth_seen))
302 FLAC__metadata_object_delete(*picture);
304 max_area_seen = area;
305 max_depth_seen = obj->data.picture.depth;
308 FLAC__metadata_object_delete(obj);
311 } while(FLAC__metadata_simple_iterator_next(it));
313 FLAC__metadata_simple_iterator_delete(it);
315 return (0 != *picture);
319 /****************************************************************************
321 * Level 1 implementation
323 ***************************************************************************/
325 #define SIMPLE_ITERATOR_MAX_PUSH_DEPTH (1+4)
326 /* 1 for initial offset, +4 for our own personal use */
328 struct FLAC__Metadata_SimpleIterator {
330 char *filename, *tempfile_path_prefix;
331 struct flac_stat_s stats;
332 FLAC__bool has_stats;
333 FLAC__bool is_writable;
334 FLAC__Metadata_SimpleIteratorStatus status;
335 FLAC__off_t offset[SIMPLE_ITERATOR_MAX_PUSH_DEPTH];
336 FLAC__off_t first_offset; /* this is the offset to the STREAMINFO block */
338 /* this is the metadata block header of the current block we are pointing to: */
340 FLAC__MetadataType type;
344 FLAC_API const char * const FLAC__Metadata_SimpleIteratorStatusString[] = {
345 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK",
346 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT",
347 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE",
348 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE",
349 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE",
350 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA",
351 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR",
352 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR",
353 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR",
354 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR",
355 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR",
356 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR",
357 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR"
361 FLAC_API FLAC__Metadata_SimpleIterator *FLAC__metadata_simple_iterator_new(void)
363 FLAC__Metadata_SimpleIterator *iterator = calloc(1, sizeof(FLAC__Metadata_SimpleIterator));
367 iterator->filename = 0;
368 iterator->tempfile_path_prefix = 0;
369 iterator->has_stats = false;
370 iterator->is_writable = false;
371 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
372 iterator->first_offset = iterator->offset[0] = -1;
379 static void simple_iterator_free_guts_(FLAC__Metadata_SimpleIterator *iterator)
381 FLAC__ASSERT(0 != iterator);
383 if(0 != iterator->file) {
384 fclose(iterator->file);
386 if(iterator->has_stats)
387 set_file_stats_(iterator->filename, &iterator->stats);
389 if(0 != iterator->filename) {
390 free(iterator->filename);
391 iterator->filename = 0;
393 if(0 != iterator->tempfile_path_prefix) {
394 free(iterator->tempfile_path_prefix);
395 iterator->tempfile_path_prefix = 0;
399 FLAC_API void FLAC__metadata_simple_iterator_delete(FLAC__Metadata_SimpleIterator *iterator)
401 FLAC__ASSERT(0 != iterator);
403 simple_iterator_free_guts_(iterator);
407 FLAC_API FLAC__Metadata_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__Metadata_SimpleIterator *iterator)
409 FLAC__Metadata_SimpleIteratorStatus status;
411 FLAC__ASSERT(0 != iterator);
413 status = iterator->status;
414 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
418 static FLAC__bool simple_iterator_prime_input_(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool read_only)
422 FLAC__ASSERT(0 != iterator);
424 if(read_only || 0 == (iterator->file = flac_fopen(iterator->filename, "r+b"))) {
425 iterator->is_writable = false;
426 if(read_only || errno == EACCES) {
427 if(0 == (iterator->file = flac_fopen(iterator->filename, "rb"))) {
428 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
433 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
438 iterator->is_writable = true;
441 ret = seek_to_first_metadata_block_(iterator->file);
445 iterator->first_offset = iterator->offset[iterator->depth] = ftello(iterator->file);
446 return read_metadata_block_header_(iterator);
448 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
451 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
454 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE;
463 @@@ If we decide to finish implementing this, put this comment back in metadata.h
465 * The 'tempfile_path_prefix' allows you to specify a directory where
466 * tempfiles should go. Remember that if your metadata edits cause the
467 * FLAC file to grow, the entire file will have to be rewritten. If
468 * 'tempfile_path_prefix' is NULL, the temp file will be written in the
469 * same directory as the original FLAC file. This makes replacing the
470 * original with the tempfile fast but requires extra space in the same
471 * partition for the tempfile. If space is a problem, you can pass a
472 * directory name belonging to a different partition in
473 * 'tempfile_path_prefix'. Note that you should use the forward slash
474 * '/' as the directory separator. A trailing slash is not needed; it
475 * will be added automatically.
477 FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats, const char *tempfile_path_prefix);
480 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)
482 const char *tempfile_path_prefix = 0; /*@@@ search for comments near 'flac_rename(...)' for what it will take to finish implementing this */
484 FLAC__ASSERT(0 != iterator);
485 FLAC__ASSERT(0 != filename);
487 simple_iterator_free_guts_(iterator);
489 if(!read_only && preserve_file_stats)
490 iterator->has_stats = get_file_stats_(filename, &iterator->stats);
492 if(0 == (iterator->filename = strdup(filename))) {
493 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
496 if(0 != tempfile_path_prefix && 0 == (iterator->tempfile_path_prefix = strdup(tempfile_path_prefix))) {
497 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
501 return simple_iterator_prime_input_(iterator, read_only);
504 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__Metadata_SimpleIterator *iterator)
506 FLAC__ASSERT(0 != iterator);
507 FLAC__ASSERT(0 != iterator->file);
509 return iterator->is_writable;
512 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__Metadata_SimpleIterator *iterator)
514 FLAC__ASSERT(0 != iterator);
515 FLAC__ASSERT(0 != iterator->file);
517 if(iterator->is_last)
520 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
521 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
525 iterator->offset[iterator->depth] = ftello(iterator->file);
527 return read_metadata_block_header_(iterator);
530 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__Metadata_SimpleIterator *iterator)
532 FLAC__off_t this_offset;
534 FLAC__ASSERT(0 != iterator);
535 FLAC__ASSERT(0 != iterator->file);
537 if(iterator->offset[iterator->depth] == iterator->first_offset)
540 if(0 != fseeko(iterator->file, iterator->first_offset, SEEK_SET)) {
541 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
544 this_offset = iterator->first_offset;
545 if(!read_metadata_block_header_(iterator))
548 /* we ignore any error from ftello() and catch it in fseeko() */
549 while(ftello(iterator->file) + (FLAC__off_t)iterator->length < iterator->offset[iterator->depth]) {
550 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
551 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
554 this_offset = ftello(iterator->file);
555 if(!read_metadata_block_header_(iterator))
559 iterator->offset[iterator->depth] = this_offset;
565 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_last(const FLAC__Metadata_SimpleIterator *iterator)
567 FLAC__ASSERT(0 != iterator);
568 FLAC__ASSERT(0 != iterator->file);
570 return iterator->is_last;
574 FLAC_API off_t FLAC__metadata_simple_iterator_get_block_offset(const FLAC__Metadata_SimpleIterator *iterator)
576 FLAC__ASSERT(0 != iterator);
577 FLAC__ASSERT(0 != iterator->file);
579 return iterator->offset[iterator->depth];
582 FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator)
584 FLAC__ASSERT(0 != iterator);
585 FLAC__ASSERT(0 != iterator->file);
587 return iterator->type;
591 FLAC_API unsigned FLAC__metadata_simple_iterator_get_block_length(const FLAC__Metadata_SimpleIterator *iterator)
593 FLAC__ASSERT(0 != iterator);
594 FLAC__ASSERT(0 != iterator->file);
596 return iterator->length;
600 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_get_application_id(FLAC__Metadata_SimpleIterator *iterator, FLAC__byte *id)
602 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
604 FLAC__ASSERT(0 != iterator);
605 FLAC__ASSERT(0 != iterator->file);
606 FLAC__ASSERT(0 != id);
608 if(iterator->type != FLAC__METADATA_TYPE_APPLICATION) {
609 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
613 if(fread(id, 1, id_bytes, iterator->file) != id_bytes) {
614 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
619 if(0 != fseeko(iterator->file, -((int)id_bytes), SEEK_CUR)) {
620 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
627 FLAC_API FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator)
629 FLAC__StreamMetadata *block = FLAC__metadata_object_new(iterator->type);
631 FLAC__ASSERT(0 != iterator);
632 FLAC__ASSERT(0 != iterator->file);
635 block->is_last = iterator->is_last;
636 block->length = iterator->length;
638 if(!read_metadata_block_data_(iterator, block)) {
639 FLAC__metadata_object_delete(block);
643 /* back up to the beginning of the block data to stay consistent */
644 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH, SEEK_SET)) {
645 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
646 FLAC__metadata_object_delete(block);
651 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
656 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
658 FLAC__ASSERT_DECLARATION(FLAC__off_t debug_target_offset = iterator->offset[iterator->depth];)
661 FLAC__ASSERT(0 != iterator);
662 FLAC__ASSERT(0 != iterator->file);
663 FLAC__ASSERT(0 != block);
665 if(!iterator->is_writable) {
666 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
670 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO || block->type == FLAC__METADATA_TYPE_STREAMINFO) {
671 if(iterator->type != block->type) {
672 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
677 block->is_last = iterator->is_last;
679 if(iterator->length == block->length)
680 return write_metadata_block_stationary_(iterator, block);
681 else if(iterator->length > block->length) {
682 if(use_padding && iterator->length >= FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) {
683 ret = write_metadata_block_stationary_with_padding_(iterator, block, iterator->length - FLAC__STREAM_METADATA_HEADER_LENGTH - block->length, block->is_last);
684 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
685 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
689 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
690 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
691 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
695 else /* iterator->length < block->length */ {
696 unsigned padding_leftover = 0;
697 FLAC__bool padding_is_last = false;
699 /* first see if we can even use padding */
700 if(iterator->is_last) {
704 const unsigned extra_padding_bytes_required = block->length - iterator->length;
705 simple_iterator_push_(iterator);
706 if(!FLAC__metadata_simple_iterator_next(iterator)) {
707 (void)simple_iterator_pop_(iterator);
710 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
714 if(FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length == extra_padding_bytes_required) {
715 padding_leftover = 0;
716 block->is_last = iterator->is_last;
718 else if(iterator->length < extra_padding_bytes_required)
721 padding_leftover = FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length - extra_padding_bytes_required;
722 padding_is_last = iterator->is_last;
723 block->is_last = false;
726 if(!simple_iterator_pop_(iterator))
731 if(padding_leftover == 0) {
732 ret = write_metadata_block_stationary_(iterator, block);
733 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
734 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
738 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
739 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
740 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
741 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
746 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
747 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
748 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
754 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
756 unsigned padding_leftover = 0;
757 FLAC__bool padding_is_last = false;
759 FLAC__ASSERT_DECLARATION(FLAC__off_t debug_target_offset = iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length;)
762 FLAC__ASSERT(0 != iterator);
763 FLAC__ASSERT(0 != iterator->file);
764 FLAC__ASSERT(0 != block);
766 if(!iterator->is_writable)
769 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
770 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
774 block->is_last = iterator->is_last;
777 /* first see if we can even use padding */
778 if(iterator->is_last) {
782 simple_iterator_push_(iterator);
783 if(!FLAC__metadata_simple_iterator_next(iterator)) {
784 (void)simple_iterator_pop_(iterator);
787 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
791 if(iterator->length == block->length) {
792 padding_leftover = 0;
793 block->is_last = iterator->is_last;
795 else if(iterator->length < FLAC__STREAM_METADATA_HEADER_LENGTH + block->length)
798 padding_leftover = iterator->length - block->length;
799 padding_is_last = iterator->is_last;
800 block->is_last = false;
803 if(!simple_iterator_pop_(iterator))
808 /* move to the next block, which is suitable padding */
809 if(!FLAC__metadata_simple_iterator_next(iterator))
811 if(padding_leftover == 0) {
812 ret = write_metadata_block_stationary_(iterator, block);
813 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
814 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
818 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
819 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
820 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
821 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
826 ret = rewrite_whole_file_(iterator, block, /*append=*/true);
827 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
828 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
833 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool use_padding)
835 FLAC__ASSERT_DECLARATION(FLAC__off_t debug_target_offset = iterator->offset[iterator->depth];)
838 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO) {
839 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
844 FLAC__StreamMetadata *padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
846 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
849 padding->length = iterator->length;
850 if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false)) {
851 FLAC__metadata_object_delete(padding);
854 FLAC__metadata_object_delete(padding);
855 if(!FLAC__metadata_simple_iterator_prev(iterator))
857 FLAC__ASSERT(iterator->offset[iterator->depth] + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length == debug_target_offset);
858 FLAC__ASSERT(ftello(iterator->file) + (FLAC__off_t)iterator->length == debug_target_offset);
862 ret = rewrite_whole_file_(iterator, 0, /*append=*/false);
863 FLAC__ASSERT(iterator->offset[iterator->depth] + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length == debug_target_offset);
864 FLAC__ASSERT(ftello(iterator->file) + (FLAC__off_t)iterator->length == debug_target_offset);
871 /****************************************************************************
873 * Level 2 implementation
875 ***************************************************************************/
878 typedef struct FLAC__Metadata_Node {
879 FLAC__StreamMetadata *data;
880 struct FLAC__Metadata_Node *prev, *next;
881 } FLAC__Metadata_Node;
883 struct FLAC__Metadata_Chain {
884 char *filename; /* will be NULL if using callbacks */
886 FLAC__Metadata_Node *head;
887 FLAC__Metadata_Node *tail;
889 FLAC__Metadata_ChainStatus status;
890 FLAC__off_t first_offset, last_offset;
892 * This is the length of the chain initially read from the FLAC file.
893 * it is used to compare against the current length to decide whether
894 * or not the whole file has to be rewritten.
896 FLAC__off_t initial_length;
897 /* @@@ hacky, these are currently only needed by ogg reader */
898 FLAC__IOHandle handle;
899 FLAC__IOCallback_Read read_cb;
902 struct FLAC__Metadata_Iterator {
903 FLAC__Metadata_Chain *chain;
904 FLAC__Metadata_Node *current;
907 FLAC_API const char * const FLAC__Metadata_ChainStatusString[] = {
908 "FLAC__METADATA_CHAIN_STATUS_OK",
909 "FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT",
910 "FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE",
911 "FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE",
912 "FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE",
913 "FLAC__METADATA_CHAIN_STATUS_BAD_METADATA",
914 "FLAC__METADATA_CHAIN_STATUS_READ_ERROR",
915 "FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR",
916 "FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR",
917 "FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR",
918 "FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR",
919 "FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR",
920 "FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR",
921 "FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS",
922 "FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH",
923 "FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL"
927 static FLAC__Metadata_Node *node_new_(void)
929 return calloc(1, sizeof(FLAC__Metadata_Node));
932 static void node_delete_(FLAC__Metadata_Node *node)
934 FLAC__ASSERT(0 != node);
936 FLAC__metadata_object_delete(node->data);
940 static void chain_init_(FLAC__Metadata_Chain *chain)
942 FLAC__ASSERT(0 != chain);
945 chain->is_ogg = false;
946 chain->head = chain->tail = 0;
948 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
949 chain->initial_length = 0;
953 static void chain_clear_(FLAC__Metadata_Chain *chain)
955 FLAC__Metadata_Node *node, *next;
957 FLAC__ASSERT(0 != chain);
959 for(node = chain->head; node; ) {
965 if(0 != chain->filename)
966 free(chain->filename);
971 static void chain_append_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
973 FLAC__ASSERT(0 != chain);
974 FLAC__ASSERT(0 != node);
975 FLAC__ASSERT(0 != node->data);
977 node->next = node->prev = 0;
978 node->data->is_last = true;
980 chain->tail->data->is_last = false;
985 FLAC__ASSERT(0 != chain->tail);
986 chain->tail->next = node;
987 node->prev = chain->tail;
993 static void chain_remove_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
995 FLAC__ASSERT(0 != chain);
996 FLAC__ASSERT(0 != node);
998 if(node == chain->head)
999 chain->head = node->next;
1001 node->prev->next = node->next;
1003 if(node == chain->tail)
1004 chain->tail = node->prev;
1006 node->next->prev = node->prev;
1008 if(0 != chain->tail)
1009 chain->tail->data->is_last = true;
1014 static void chain_delete_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1016 chain_remove_node_(chain, node);
1020 static FLAC__off_t chain_calculate_length_(FLAC__Metadata_Chain *chain)
1022 const FLAC__Metadata_Node *node;
1023 FLAC__off_t length = 0;
1024 for(node = chain->head; node; node = node->next)
1025 length += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1029 static void iterator_insert_node_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1031 FLAC__ASSERT(0 != node);
1032 FLAC__ASSERT(0 != node->data);
1033 FLAC__ASSERT(0 != iterator);
1034 FLAC__ASSERT(0 != iterator->current);
1035 FLAC__ASSERT(0 != iterator->chain);
1036 FLAC__ASSERT(0 != iterator->chain->head);
1037 FLAC__ASSERT(0 != iterator->chain->tail);
1039 node->data->is_last = false;
1041 node->prev = iterator->current->prev;
1042 node->next = iterator->current;
1045 iterator->chain->head = node;
1047 node->prev->next = node;
1049 iterator->current->prev = node;
1051 iterator->chain->nodes++;
1054 static void iterator_insert_node_after_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1056 FLAC__ASSERT(0 != node);
1057 FLAC__ASSERT(0 != node->data);
1058 FLAC__ASSERT(0 != iterator);
1059 FLAC__ASSERT(0 != iterator->current);
1060 FLAC__ASSERT(0 != iterator->chain);
1061 FLAC__ASSERT(0 != iterator->chain->head);
1062 FLAC__ASSERT(0 != iterator->chain->tail);
1064 iterator->current->data->is_last = false;
1066 node->prev = iterator->current;
1067 node->next = iterator->current->next;
1070 iterator->chain->tail = node;
1072 node->next->prev = node;
1074 node->prev->next = node;
1076 iterator->chain->tail->data->is_last = true;
1078 iterator->chain->nodes++;
1081 /* return true iff node and node->next are both padding */
1082 static FLAC__bool chain_merge_adjacent_padding_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1084 if(node->data->type == FLAC__METADATA_TYPE_PADDING && 0 != node->next && node->next->data->type == FLAC__METADATA_TYPE_PADDING) {
1085 const unsigned growth = FLAC__STREAM_METADATA_HEADER_LENGTH + node->next->data->length;
1086 node->data->length += growth;
1088 chain_delete_node_(chain, node->next);
1095 /* Returns the new length of the chain, or 0 if there was an error. */
1096 /* WATCHOUT: This can get called multiple times before a write, so
1097 * it should still work when this happens.
1099 /* WATCHOUT: Make sure to also update the logic in
1100 * FLAC__metadata_chain_check_if_tempfile_needed() if the logic here changes.
1102 static FLAC__off_t chain_prepare_for_write_(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1104 FLAC__off_t current_length = chain_calculate_length_(chain);
1107 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1108 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1109 const FLAC__off_t delta = chain->initial_length - current_length;
1110 chain->tail->data->length += delta;
1111 current_length += delta;
1112 FLAC__ASSERT(current_length == chain->initial_length);
1114 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1115 else if(current_length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) {
1116 FLAC__StreamMetadata *padding;
1117 FLAC__Metadata_Node *node;
1118 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) {
1119 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1122 padding->length = chain->initial_length - (FLAC__STREAM_METADATA_HEADER_LENGTH + current_length);
1123 if(0 == (node = node_new_())) {
1124 FLAC__metadata_object_delete(padding);
1125 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1128 node->data = padding;
1129 chain_append_node_(chain, node);
1130 current_length = chain_calculate_length_(chain);
1131 FLAC__ASSERT(current_length == chain->initial_length);
1133 /* if the metadata grew but the last block is padding, try cutting the padding to restore the original length so we don't have to rewrite the whole file */
1134 else if(current_length > chain->initial_length) {
1135 const FLAC__off_t delta = current_length - chain->initial_length;
1136 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1137 /* if the delta is exactly the size of the last padding block, remove the padding block */
1138 if((FLAC__off_t)chain->tail->data->length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta) {
1139 chain_delete_node_(chain, chain->tail);
1140 current_length = chain_calculate_length_(chain);
1141 FLAC__ASSERT(current_length == chain->initial_length);
1143 /* if there is at least 'delta' bytes of padding, trim the padding down */
1144 else if((FLAC__off_t)chain->tail->data->length >= delta) {
1145 chain->tail->data->length -= delta;
1146 current_length -= delta;
1147 FLAC__ASSERT(current_length == chain->initial_length);
1153 return current_length;
1156 static FLAC__bool chain_read_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__IOCallback_Tell tell_cb)
1158 FLAC__Metadata_Node *node;
1160 FLAC__ASSERT(0 != chain);
1162 /* we assume we're already at the beginning of the file */
1164 switch(seek_to_first_metadata_block_cb_(handle, read_cb, seek_cb)) {
1168 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1171 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1174 chain->status = FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
1182 FLAC__int64 pos = tell_cb(handle);
1184 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1187 chain->first_offset = (FLAC__off_t)pos;
1192 FLAC__MetadataType type;
1198 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1202 if(!read_metadata_block_header_cb_(handle, read_cb, &is_last, &type, &length)) {
1204 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1208 node->data = FLAC__metadata_object_new(type);
1209 if(0 == node->data) {
1211 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1215 node->data->is_last = is_last;
1216 node->data->length = length;
1218 chain->status = get_equivalent_status_(read_metadata_block_data_cb_(handle, read_cb, seek_cb, node->data));
1219 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1223 chain_append_node_(chain, node);
1228 FLAC__int64 pos = tell_cb(handle);
1230 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1233 chain->last_offset = (FLAC__off_t)pos;
1236 chain->initial_length = chain_calculate_length_(chain);
1241 static FLAC__StreamDecoderReadStatus chain_read_ogg_read_cb_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
1243 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1245 if(*bytes > 0 && chain->status == FLAC__METADATA_CHAIN_STATUS_OK) {
1246 *bytes = chain->read_cb(buffer, sizeof(FLAC__byte), *bytes, chain->handle);
1248 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
1250 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
1253 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
1256 static FLAC__StreamDecoderWriteStatus chain_read_ogg_write_cb_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
1258 (void)decoder, (void)frame, (void)buffer, (void)client_data;
1259 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1262 static void chain_read_ogg_metadata_cb_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
1264 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1265 FLAC__Metadata_Node *node;
1271 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1275 node->data = FLAC__metadata_object_clone(metadata);
1276 if(0 == node->data) {
1278 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1282 chain_append_node_(chain, node);
1285 static void chain_read_ogg_error_cb_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1287 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1288 (void)decoder, (void)status;
1289 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1292 static FLAC__bool chain_read_ogg_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb)
1294 FLAC__StreamDecoder *decoder;
1296 FLAC__ASSERT(0 != chain);
1298 /* we assume we're already at the beginning of the file */
1300 chain->handle = handle;
1301 chain->read_cb = read_cb;
1302 if(0 == (decoder = FLAC__stream_decoder_new())) {
1303 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1306 FLAC__stream_decoder_set_metadata_respond_all(decoder);
1307 if(FLAC__stream_decoder_init_ogg_stream(decoder, chain_read_ogg_read_cb_, /*seek_callback=*/0, /*tell_callback=*/0, /*length_callback=*/0, /*eof_callback=*/0, chain_read_ogg_write_cb_, chain_read_ogg_metadata_cb_, chain_read_ogg_error_cb_, chain) != FLAC__STREAM_DECODER_INIT_STATUS_OK) {
1308 FLAC__stream_decoder_delete(decoder);
1309 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1313 chain->first_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1315 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder))
1316 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1317 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1318 FLAC__stream_decoder_delete(decoder);
1322 FLAC__stream_decoder_delete(decoder);
1324 chain->last_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1326 chain->initial_length = chain_calculate_length_(chain);
1331 static FLAC__bool chain_rewrite_metadata_in_place_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, FLAC__IOCallback_Seek seek_cb)
1333 FLAC__Metadata_Node *node;
1335 FLAC__ASSERT(0 != chain);
1336 FLAC__ASSERT(0 != chain->head);
1338 if(0 != seek_cb(handle, chain->first_offset, SEEK_SET)) {
1339 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1343 for(node = chain->head; node; node = node->next) {
1344 if(!write_metadata_block_header_cb_(handle, write_cb, node->data)) {
1345 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1348 if(!write_metadata_block_data_cb_(handle, write_cb, node->data)) {
1349 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1354 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1356 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1360 static FLAC__bool chain_rewrite_metadata_in_place_(FLAC__Metadata_Chain *chain)
1365 FLAC__ASSERT(0 != chain->filename);
1367 if(0 == (file = flac_fopen(chain->filename, "r+b"))) {
1368 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1372 /* chain_rewrite_metadata_in_place_cb_() sets chain->status for us */
1373 ret = chain_rewrite_metadata_in_place_cb_(chain, (FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, fseek_wrapper_);
1380 static FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix)
1382 FILE *f, *tempfile = NULL;
1384 FLAC__Metadata_SimpleIteratorStatus status;
1385 const FLAC__Metadata_Node *node;
1387 FLAC__ASSERT(0 != chain);
1388 FLAC__ASSERT(0 != chain->filename);
1389 FLAC__ASSERT(0 != chain->head);
1391 /* copy the file prefix (data up to first metadata block */
1392 if(0 == (f = flac_fopen(chain->filename, "rb"))) {
1393 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1396 if(!open_tempfile_(chain->filename, tempfile_path_prefix, &tempfile, &tempfilename, &status)) {
1397 chain->status = get_equivalent_status_(status);
1400 if(!copy_n_bytes_from_file_(f, tempfile, chain->first_offset, &status)) {
1401 chain->status = get_equivalent_status_(status);
1405 /* write the metadata */
1406 for(node = chain->head; node; node = node->next) {
1407 if(!write_metadata_block_header_(tempfile, &status, node->data)) {
1408 chain->status = get_equivalent_status_(status);
1411 if(!write_metadata_block_data_(tempfile, &status, node->data)) {
1412 chain->status = get_equivalent_status_(status);
1416 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1418 /* copy the file postfix (everything after the metadata) */
1419 if(0 != fseeko(f, chain->last_offset, SEEK_SET)) {
1420 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1423 if(!copy_remaining_bytes_from_file_(f, tempfile, &status)) {
1424 chain->status = get_equivalent_status_(status);
1428 /* move the tempfile on top of the original */
1430 if(!transport_tempfile_(chain->filename, &tempfile, &tempfilename, &status))
1437 cleanup_tempfile_(&tempfile, &tempfilename);
1441 /* assumes 'handle' is already at beginning of file */
1442 static FLAC__bool chain_rewrite_file_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__IOCallback_Eof eof_cb, FLAC__IOHandle temp_handle, FLAC__IOCallback_Write temp_write_cb)
1444 FLAC__Metadata_SimpleIteratorStatus status;
1445 const FLAC__Metadata_Node *node;
1447 FLAC__ASSERT(0 != chain);
1448 FLAC__ASSERT(0 == chain->filename);
1449 FLAC__ASSERT(0 != chain->head);
1451 /* copy the file prefix (data up to first metadata block */
1452 if(!copy_n_bytes_from_file_cb_(handle, read_cb, temp_handle, temp_write_cb, chain->first_offset, &status)) {
1453 chain->status = get_equivalent_status_(status);
1457 /* write the metadata */
1458 for(node = chain->head; node; node = node->next) {
1459 if(!write_metadata_block_header_cb_(temp_handle, temp_write_cb, node->data)) {
1460 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1463 if(!write_metadata_block_data_cb_(temp_handle, temp_write_cb, node->data)) {
1464 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1468 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1470 /* copy the file postfix (everything after the metadata) */
1471 if(0 != seek_cb(handle, chain->last_offset, SEEK_SET)) {
1472 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1475 if(!copy_remaining_bytes_from_file_cb_(handle, read_cb, eof_cb, temp_handle, temp_write_cb, &status)) {
1476 chain->status = get_equivalent_status_(status);
1483 FLAC_API FLAC__Metadata_Chain *FLAC__metadata_chain_new(void)
1485 FLAC__Metadata_Chain *chain = calloc(1, sizeof(FLAC__Metadata_Chain));
1493 FLAC_API void FLAC__metadata_chain_delete(FLAC__Metadata_Chain *chain)
1495 FLAC__ASSERT(0 != chain);
1497 chain_clear_(chain);
1502 FLAC_API FLAC__Metadata_ChainStatus FLAC__metadata_chain_status(FLAC__Metadata_Chain *chain)
1504 FLAC__Metadata_ChainStatus status;
1506 FLAC__ASSERT(0 != chain);
1508 status = chain->status;
1509 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1513 static FLAC__bool chain_read_(FLAC__Metadata_Chain *chain, const char *filename, FLAC__bool is_ogg)
1518 FLAC__ASSERT(0 != chain);
1519 FLAC__ASSERT(0 != filename);
1521 chain_clear_(chain);
1523 if(0 == (chain->filename = strdup(filename))) {
1524 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1528 chain->is_ogg = is_ogg;
1530 if(0 == (file = flac_fopen(filename, "rb"))) {
1531 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1535 /* the function also sets chain->status for us */
1537 chain_read_ogg_cb_(chain, file, (FLAC__IOCallback_Read)fread) :
1538 chain_read_cb_(chain, file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, ftell_wrapper_)
1546 FLAC_API FLAC__bool FLAC__metadata_chain_read(FLAC__Metadata_Chain *chain, const char *filename)
1548 return chain_read_(chain, filename, /*is_ogg=*/false);
1551 /*@@@@add to tests*/
1552 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg(FLAC__Metadata_Chain *chain, const char *filename)
1554 return chain_read_(chain, filename, /*is_ogg=*/true);
1557 static FLAC__bool chain_read_with_callbacks_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks, FLAC__bool is_ogg)
1561 FLAC__ASSERT(0 != chain);
1563 chain_clear_(chain);
1565 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.tell) {
1566 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1570 chain->is_ogg = is_ogg;
1573 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1574 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1578 /* the function also sets chain->status for us */
1580 chain_read_ogg_cb_(chain, handle, callbacks.read) :
1581 chain_read_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.tell)
1587 FLAC_API FLAC__bool FLAC__metadata_chain_read_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1589 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/false);
1592 /*@@@@add to tests*/
1593 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1595 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/true);
1598 FLAC_API FLAC__bool FLAC__metadata_chain_check_if_tempfile_needed(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1600 /* This does all the same checks that are in chain_prepare_for_write_()
1601 * but doesn't actually alter the chain. Make sure to update the logic
1602 * here if chain_prepare_for_write_() changes.
1604 const FLAC__off_t current_length = chain_calculate_length_(chain);
1606 FLAC__ASSERT(0 != chain);
1609 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1610 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING)
1612 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1613 else if(current_length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length)
1615 /* if the metadata grew but the last block is padding, try cutting the padding to restore the original length so we don't have to rewrite the whole file */
1616 else if(current_length > chain->initial_length) {
1617 const FLAC__off_t delta = current_length - chain->initial_length;
1618 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1619 /* if the delta is exactly the size of the last padding block, remove the padding block */
1620 if((FLAC__off_t)chain->tail->data->length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta)
1622 /* if there is at least 'delta' bytes of padding, trim the padding down */
1623 else if((FLAC__off_t)chain->tail->data->length >= delta)
1629 return (current_length != chain->initial_length);
1632 FLAC_API FLAC__bool FLAC__metadata_chain_write(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats)
1634 struct flac_stat_s stats;
1635 const char *tempfile_path_prefix = 0;
1636 FLAC__off_t current_length;
1638 FLAC__ASSERT(0 != chain);
1640 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1641 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1645 if (0 == chain->filename) {
1646 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1650 current_length = chain_prepare_for_write_(chain, use_padding);
1652 /* a return value of 0 means there was an error; chain->status is already set */
1653 if (0 == current_length)
1656 if(preserve_file_stats)
1657 get_file_stats_(chain->filename, &stats);
1659 if(current_length == chain->initial_length) {
1660 if(!chain_rewrite_metadata_in_place_(chain))
1664 if(!chain_rewrite_file_(chain, tempfile_path_prefix))
1667 /* recompute lengths and offsets */
1669 const FLAC__Metadata_Node *node;
1670 chain->initial_length = current_length;
1671 chain->last_offset = chain->first_offset;
1672 for(node = chain->head; node; node = node->next)
1673 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1677 if(preserve_file_stats)
1678 set_file_stats_(chain->filename, &stats);
1683 FLAC_API FLAC__bool FLAC__metadata_chain_write_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1685 FLAC__off_t current_length;
1687 FLAC__ASSERT(0 != chain);
1689 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1690 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1694 if (0 != chain->filename) {
1695 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1699 if (0 == callbacks.write || 0 == callbacks.seek) {
1700 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1704 if (FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1705 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1709 current_length = chain_prepare_for_write_(chain, use_padding);
1711 /* a return value of 0 means there was an error; chain->status is already set */
1712 if (0 == current_length)
1715 FLAC__ASSERT(current_length == chain->initial_length);
1717 return chain_rewrite_metadata_in_place_cb_(chain, handle, callbacks.write, callbacks.seek);
1720 FLAC_API FLAC__bool FLAC__metadata_chain_write_with_callbacks_and_tempfile(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks, FLAC__IOHandle temp_handle, FLAC__IOCallbacks temp_callbacks)
1722 FLAC__off_t current_length;
1724 FLAC__ASSERT(0 != chain);
1726 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1727 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1731 if (0 != chain->filename) {
1732 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1736 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.eof) {
1737 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1740 if (0 == temp_callbacks.write) {
1741 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1745 if (!FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1746 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1750 current_length = chain_prepare_for_write_(chain, use_padding);
1752 /* a return value of 0 means there was an error; chain->status is already set */
1753 if (0 == current_length)
1756 FLAC__ASSERT(current_length != chain->initial_length);
1759 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1760 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1764 if(!chain_rewrite_file_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.eof, temp_handle, temp_callbacks.write))
1767 /* recompute lengths and offsets */
1769 const FLAC__Metadata_Node *node;
1770 chain->initial_length = current_length;
1771 chain->last_offset = chain->first_offset;
1772 for(node = chain->head; node; node = node->next)
1773 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1779 FLAC_API void FLAC__metadata_chain_merge_padding(FLAC__Metadata_Chain *chain)
1781 FLAC__Metadata_Node *node;
1783 FLAC__ASSERT(0 != chain);
1785 for(node = chain->head; node; ) {
1786 if(!chain_merge_adjacent_padding_(chain, node))
1791 FLAC_API void FLAC__metadata_chain_sort_padding(FLAC__Metadata_Chain *chain)
1793 FLAC__Metadata_Node *node, *save;
1796 FLAC__ASSERT(0 != chain);
1799 * Don't try and be too smart... this simple algo is good enough for
1800 * the small number of nodes that we deal with.
1802 for(i = 0, node = chain->head; i < chain->nodes; i++) {
1803 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1805 chain_remove_node_(chain, node);
1806 chain_append_node_(chain, node);
1814 FLAC__metadata_chain_merge_padding(chain);
1818 FLAC_API FLAC__Metadata_Iterator *FLAC__metadata_iterator_new(void)
1820 FLAC__Metadata_Iterator *iterator = calloc(1, sizeof(FLAC__Metadata_Iterator));
1822 /* calloc() implies:
1823 iterator->current = 0;
1824 iterator->chain = 0;
1830 FLAC_API void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator)
1832 FLAC__ASSERT(0 != iterator);
1837 FLAC_API void FLAC__metadata_iterator_init(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Chain *chain)
1839 FLAC__ASSERT(0 != iterator);
1840 FLAC__ASSERT(0 != chain);
1841 FLAC__ASSERT(0 != chain->head);
1843 iterator->chain = chain;
1844 iterator->current = chain->head;
1847 FLAC_API FLAC__bool FLAC__metadata_iterator_next(FLAC__Metadata_Iterator *iterator)
1849 FLAC__ASSERT(0 != iterator);
1851 if(0 == iterator->current || 0 == iterator->current->next)
1854 iterator->current = iterator->current->next;
1858 FLAC_API FLAC__bool FLAC__metadata_iterator_prev(FLAC__Metadata_Iterator *iterator)
1860 FLAC__ASSERT(0 != iterator);
1862 if(0 == iterator->current || 0 == iterator->current->prev)
1865 iterator->current = iterator->current->prev;
1869 FLAC_API FLAC__MetadataType FLAC__metadata_iterator_get_block_type(const FLAC__Metadata_Iterator *iterator)
1871 FLAC__ASSERT(0 != iterator);
1872 FLAC__ASSERT(0 != iterator->current);
1873 FLAC__ASSERT(0 != iterator->current->data);
1875 return iterator->current->data->type;
1878 FLAC_API FLAC__StreamMetadata *FLAC__metadata_iterator_get_block(FLAC__Metadata_Iterator *iterator)
1880 FLAC__ASSERT(0 != iterator);
1881 FLAC__ASSERT(0 != iterator->current);
1883 return iterator->current->data;
1886 FLAC_API FLAC__bool FLAC__metadata_iterator_set_block(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1888 FLAC__ASSERT(0 != iterator);
1889 FLAC__ASSERT(0 != block);
1890 return FLAC__metadata_iterator_delete_block(iterator, false) && FLAC__metadata_iterator_insert_block_after(iterator, block);
1893 FLAC_API FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__Metadata_Iterator *iterator, FLAC__bool replace_with_padding)
1895 FLAC__Metadata_Node *save;
1897 FLAC__ASSERT(0 != iterator);
1898 FLAC__ASSERT(0 != iterator->current);
1900 if(0 == iterator->current->prev) {
1901 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1905 save = iterator->current->prev;
1907 if(replace_with_padding) {
1908 FLAC__metadata_object_delete_data(iterator->current->data);
1909 iterator->current->data->type = FLAC__METADATA_TYPE_PADDING;
1912 chain_delete_node_(iterator->chain, iterator->current);
1915 iterator->current = save;
1919 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1921 FLAC__Metadata_Node *node;
1923 FLAC__ASSERT(0 != iterator);
1924 FLAC__ASSERT(0 != iterator->current);
1925 FLAC__ASSERT(0 != block);
1927 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1930 if(0 == iterator->current->prev) {
1931 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1935 if(0 == (node = node_new_()))
1939 iterator_insert_node_(iterator, node);
1940 iterator->current = node;
1944 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1946 FLAC__Metadata_Node *node;
1948 FLAC__ASSERT(0 != iterator);
1949 FLAC__ASSERT(0 != iterator->current);
1950 FLAC__ASSERT(0 != block);
1952 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1955 if(0 == (node = node_new_()))
1959 iterator_insert_node_after_(iterator, node);
1960 iterator->current = node;
1965 /****************************************************************************
1967 * Local function definitions
1969 ***************************************************************************/
1971 void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1977 for(i = 0; i < bytes; i++) {
1978 *(--b) = (FLAC__byte)(val & 0xff);
1983 void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1987 for(i = 0; i < bytes; i++) {
1988 *(b++) = (FLAC__byte)(val & 0xff);
1993 void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes)
1999 for(i = 0; i < bytes; i++) {
2000 *(--b) = (FLAC__byte)(val & 0xff);
2005 FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes)
2007 FLAC__uint32 ret = 0;
2010 for(i = 0; i < bytes; i++)
2011 ret = (ret << 8) | (FLAC__uint32)(*b++);
2016 FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes)
2018 FLAC__uint32 ret = 0;
2023 for(i = 0; i < bytes; i++)
2024 ret = (ret << 8) | (FLAC__uint32)(*--b);
2029 FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes)
2031 FLAC__uint64 ret = 0;
2034 for(i = 0; i < bytes; i++)
2035 ret = (ret << 8) | (FLAC__uint64)(*b++);
2040 FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator)
2042 FLAC__ASSERT(0 != iterator);
2043 FLAC__ASSERT(0 != iterator->file);
2045 if(!read_metadata_block_header_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, &iterator->is_last, &iterator->type, &iterator->length)) {
2046 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2053 FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block)
2055 FLAC__ASSERT(0 != iterator);
2056 FLAC__ASSERT(0 != iterator->file);
2058 iterator->status = read_metadata_block_data_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, block);
2060 return (iterator->status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK);
2063 FLAC__bool read_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__bool *is_last, FLAC__MetadataType *type, unsigned *length)
2065 FLAC__byte raw_header[FLAC__STREAM_METADATA_HEADER_LENGTH];
2067 if(read_cb(raw_header, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2070 *is_last = raw_header[0] & 0x80? true : false;
2071 *type = (FLAC__MetadataType)(raw_header[0] & 0x7f);
2072 *length = unpack_uint32_(raw_header + 1, 3);
2074 /* Note that we don't check:
2075 * if(iterator->type >= FLAC__METADATA_TYPE_UNDEFINED)
2076 * we just will read in an opaque block
2082 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata *block)
2084 switch(block->type) {
2085 case FLAC__METADATA_TYPE_STREAMINFO:
2086 return read_metadata_block_data_streaminfo_cb_(handle, read_cb, &block->data.stream_info);
2087 case FLAC__METADATA_TYPE_PADDING:
2088 return read_metadata_block_data_padding_cb_(handle, seek_cb, &block->data.padding, block->length);
2089 case FLAC__METADATA_TYPE_APPLICATION:
2090 return read_metadata_block_data_application_cb_(handle, read_cb, &block->data.application, block->length);
2091 case FLAC__METADATA_TYPE_SEEKTABLE:
2092 return read_metadata_block_data_seektable_cb_(handle, read_cb, &block->data.seek_table, block->length);
2093 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2094 return read_metadata_block_data_vorbis_comment_cb_(handle, read_cb, &block->data.vorbis_comment);
2095 case FLAC__METADATA_TYPE_CUESHEET:
2096 return read_metadata_block_data_cuesheet_cb_(handle, read_cb, &block->data.cue_sheet);
2097 case FLAC__METADATA_TYPE_PICTURE:
2098 return read_metadata_block_data_picture_cb_(handle, read_cb, &block->data.picture);
2100 return read_metadata_block_data_unknown_cb_(handle, read_cb, &block->data.unknown, block->length);
2104 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block)
2106 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH], *b;
2108 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2109 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2113 /* we are using hardcoded numbers for simplicity but we should
2114 * probably eventually write a bit-level unpacker and use the
2115 * _STREAMINFO_ constants.
2117 block->min_blocksize = unpack_uint32_(b, 2); b += 2;
2118 block->max_blocksize = unpack_uint32_(b, 2); b += 2;
2119 block->min_framesize = unpack_uint32_(b, 3); b += 3;
2120 block->max_framesize = unpack_uint32_(b, 3); b += 3;
2121 block->sample_rate = (unpack_uint32_(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4);
2122 block->channels = (unsigned)((b[2] & 0x0e) >> 1) + 1;
2123 block->bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 4) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1;
2124 block->total_samples = (((FLAC__uint64)(b[3] & 0x0f)) << 32) | unpack_uint64_(b+4, 4);
2125 memcpy(block->md5sum, b+8, 16);
2127 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2130 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_Padding *block, unsigned block_length)
2132 (void)block; /* nothing to do; we don't care about reading the padding bytes */
2134 if(0 != seek_cb(handle, block_length, SEEK_CUR))
2135 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2137 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2140 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Application *block, unsigned block_length)
2142 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2144 if(read_cb(block->id, 1, id_bytes, handle) != id_bytes)
2145 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2147 if(block_length < id_bytes)
2148 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2150 block_length -= id_bytes;
2152 if(block_length == 0) {
2156 if(0 == (block->data = malloc(block_length)))
2157 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2159 if(read_cb(block->data, 1, block_length, handle) != block_length)
2160 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2163 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2166 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_SeekTable *block, unsigned block_length)
2169 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2171 FLAC__ASSERT(block_length % FLAC__STREAM_METADATA_SEEKPOINT_LENGTH == 0);
2173 block->num_points = block_length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
2175 if(block->num_points == 0)
2177 else if(0 == (block->points = safe_malloc_mul_2op_p(block->num_points, /*times*/sizeof(FLAC__StreamMetadata_SeekPoint))))
2178 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2180 for(i = 0; i < block->num_points; i++) {
2181 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2182 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2183 /* some MAGIC NUMBERs here */
2184 block->points[i].sample_number = unpack_uint64_(buffer, 8);
2185 block->points[i].stream_offset = unpack_uint64_(buffer+8, 8);
2186 block->points[i].frame_samples = unpack_uint32_(buffer+16, 2);
2189 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2192 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment_Entry *entry)
2194 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2195 FLAC__byte buffer[4]; /* magic number is asserted below */
2197 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8 == sizeof(buffer));
2199 if(read_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2200 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2201 entry->length = unpack_uint32_little_endian_(buffer, entry_length_len);
2203 if(0 != entry->entry)
2206 if(entry->length == 0) {
2210 if(0 == (entry->entry = safe_malloc_add_2op_(entry->length, /*+*/1)))
2211 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2213 if(read_cb(entry->entry, 1, entry->length, handle) != entry->length)
2214 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2216 entry->entry[entry->length] = '\0';
2219 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2222 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment *block)
2225 FLAC__Metadata_SimpleIteratorStatus status;
2226 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2227 FLAC__byte buffer[4]; /* magic number is asserted below */
2229 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8 == sizeof(buffer));
2231 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, &(block->vendor_string))))
2234 if(read_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2235 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2236 block->num_comments = unpack_uint32_little_endian_(buffer, num_comments_len);
2238 if(block->num_comments == 0) {
2239 block->comments = 0;
2241 else if(0 == (block->comments = calloc(block->num_comments, sizeof(FLAC__StreamMetadata_VorbisComment_Entry))))
2242 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2244 for(i = 0; i < block->num_comments; i++) {
2245 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, block->comments + i)))
2249 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2252 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track)
2255 FLAC__byte buffer[32]; /* asserted below that this is big enough */
2257 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2258 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2259 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);
2261 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2262 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2263 if(read_cb(buffer, 1, len, handle) != len)
2264 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2265 track->offset = unpack_uint64_(buffer, len);
2267 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2268 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2269 if(read_cb(buffer, 1, len, handle) != len)
2270 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2271 track->number = (FLAC__byte)unpack_uint32_(buffer, len);
2273 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2274 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2275 if(read_cb(track->isrc, 1, len, handle) != len)
2276 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2278 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);
2279 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2280 if(read_cb(buffer, 1, len, handle) != len)
2281 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2282 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN == 1);
2283 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN == 1);
2284 track->type = buffer[0] >> 7;
2285 track->pre_emphasis = (buffer[0] >> 6) & 1;
2287 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2288 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2289 if(read_cb(buffer, 1, len, handle) != len)
2290 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2291 track->num_indices = (FLAC__byte)unpack_uint32_(buffer, len);
2293 if(track->num_indices == 0) {
2296 else if(0 == (track->indices = calloc(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index))))
2297 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2299 for(i = 0; i < track->num_indices; i++) {
2300 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2301 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2302 if(read_cb(buffer, 1, len, handle) != len)
2303 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2304 track->indices[i].offset = unpack_uint64_(buffer, len);
2306 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2307 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2308 if(read_cb(buffer, 1, len, handle) != len)
2309 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2310 track->indices[i].number = (FLAC__byte)unpack_uint32_(buffer, len);
2312 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2313 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2314 if(read_cb(buffer, 1, len, handle) != len)
2315 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2318 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2321 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block)
2324 FLAC__Metadata_SimpleIteratorStatus status;
2325 FLAC__byte buffer[1024]; /* MSVC needs a constant expression so we put a magic number and assert */
2327 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN)/8 <= sizeof(buffer));
2328 FLAC__ASSERT(sizeof(FLAC__uint64) <= sizeof(buffer));
2330 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2331 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2332 if(read_cb(block->media_catalog_number, 1, len, handle) != len)
2333 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2335 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2336 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2337 if(read_cb(buffer, 1, len, handle) != len)
2338 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2339 block->lead_in = unpack_uint64_(buffer, len);
2341 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2342 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2343 if(read_cb(buffer, 1, len, handle) != len)
2344 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2345 block->is_cd = buffer[0]&0x80? true : false;
2347 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2348 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2349 if(read_cb(buffer, 1, len, handle) != len)
2350 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2351 block->num_tracks = unpack_uint32_(buffer, len);
2353 if(block->num_tracks == 0) {
2356 else if(0 == (block->tracks = calloc(block->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track))))
2357 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2359 for(i = 0; i < block->num_tracks; i++) {
2360 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_cuesheet_track_cb_(handle, read_cb, block->tracks + i)))
2364 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2367 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cstring_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__byte **data, FLAC__uint32 *length, FLAC__uint32 length_len)
2369 FLAC__byte buffer[sizeof(FLAC__uint32)];
2371 FLAC__ASSERT(0 != data);
2372 FLAC__ASSERT(length_len%8 == 0);
2374 length_len /= 8; /* convert to bytes */
2376 FLAC__ASSERT(sizeof(buffer) >= length_len);
2378 if(read_cb(buffer, 1, length_len, handle) != length_len)
2379 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2380 *length = unpack_uint32_(buffer, length_len);
2385 if(0 == (*data = safe_malloc_add_2op_(*length, /*+*/1)))
2386 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2389 if(read_cb(*data, 1, *length, handle) != *length)
2390 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2393 (*data)[*length] = '\0';
2395 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2398 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block)
2400 FLAC__Metadata_SimpleIteratorStatus status;
2401 FLAC__byte buffer[4]; /* asserted below that this is big enough */
2404 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2405 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2406 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2407 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2408 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2410 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_TYPE_LEN % 8 == 0);
2411 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN / 8;
2412 if(read_cb(buffer, 1, len, handle) != len)
2413 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2414 block->type = (FLAC__StreamMetadata_Picture_Type)unpack_uint32_(buffer, len);
2416 if((status = read_metadata_block_data_picture_cstring_cb_(handle, read_cb, (FLAC__byte**)(&(block->mime_type)), &len, FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN)) != FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK)
2419 if((status = read_metadata_block_data_picture_cstring_cb_(handle, read_cb, &(block->description), &len, FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN)) != FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK)
2422 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN % 8 == 0);
2423 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN / 8;
2424 if(read_cb(buffer, 1, len, handle) != len)
2425 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2426 block->width = unpack_uint32_(buffer, len);
2428 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN % 8 == 0);
2429 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN / 8;
2430 if(read_cb(buffer, 1, len, handle) != len)
2431 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2432 block->height = unpack_uint32_(buffer, len);
2434 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN % 8 == 0);
2435 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN / 8;
2436 if(read_cb(buffer, 1, len, handle) != len)
2437 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2438 block->depth = unpack_uint32_(buffer, len);
2440 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_COLORS_LEN % 8 == 0);
2441 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN / 8;
2442 if(read_cb(buffer, 1, len, handle) != len)
2443 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2444 block->colors = unpack_uint32_(buffer, len);
2446 /* for convenience we use read_metadata_block_data_picture_cstring_cb_() even though it adds an extra terminating NUL we don't use */
2447 if((status = read_metadata_block_data_picture_cstring_cb_(handle, read_cb, &(block->data), &(block->data_length), FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN)) != FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK)
2450 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2453 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2455 if(block_length == 0) {
2459 if(0 == (block->data = malloc(block_length)))
2460 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2462 if(read_cb(block->data, 1, block_length, handle) != block_length)
2463 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2466 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2469 FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2471 FLAC__ASSERT(0 != file);
2472 FLAC__ASSERT(0 != status);
2474 if(!write_metadata_block_header_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2475 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2482 FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2484 FLAC__ASSERT(0 != file);
2485 FLAC__ASSERT(0 != status);
2487 if (write_metadata_block_data_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2488 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2492 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2497 FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2499 FLAC__byte buffer[FLAC__STREAM_METADATA_HEADER_LENGTH];
2501 FLAC__ASSERT(block->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
2503 buffer[0] = (block->is_last? 0x80 : 0) | (FLAC__byte)block->type;
2504 pack_uint32_(block->length, buffer + 1, 3);
2506 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2512 FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2514 FLAC__ASSERT(0 != block);
2516 switch(block->type) {
2517 case FLAC__METADATA_TYPE_STREAMINFO:
2518 return write_metadata_block_data_streaminfo_cb_(handle, write_cb, &block->data.stream_info);
2519 case FLAC__METADATA_TYPE_PADDING:
2520 return write_metadata_block_data_padding_cb_(handle, write_cb, &block->data.padding, block->length);
2521 case FLAC__METADATA_TYPE_APPLICATION:
2522 return write_metadata_block_data_application_cb_(handle, write_cb, &block->data.application, block->length);
2523 case FLAC__METADATA_TYPE_SEEKTABLE:
2524 return write_metadata_block_data_seektable_cb_(handle, write_cb, &block->data.seek_table);
2525 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2526 return write_metadata_block_data_vorbis_comment_cb_(handle, write_cb, &block->data.vorbis_comment);
2527 case FLAC__METADATA_TYPE_CUESHEET:
2528 return write_metadata_block_data_cuesheet_cb_(handle, write_cb, &block->data.cue_sheet);
2529 case FLAC__METADATA_TYPE_PICTURE:
2530 return write_metadata_block_data_picture_cb_(handle, write_cb, &block->data.picture);
2532 return write_metadata_block_data_unknown_cb_(handle, write_cb, &block->data.unknown, block->length);
2536 FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block)
2538 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH];
2539 const unsigned channels1 = block->channels - 1;
2540 const unsigned bps1 = block->bits_per_sample - 1;
2542 /* we are using hardcoded numbers for simplicity but we should
2543 * probably eventually write a bit-level packer and use the
2544 * _STREAMINFO_ constants.
2546 pack_uint32_(block->min_blocksize, buffer, 2);
2547 pack_uint32_(block->max_blocksize, buffer+2, 2);
2548 pack_uint32_(block->min_framesize, buffer+4, 3);
2549 pack_uint32_(block->max_framesize, buffer+7, 3);
2550 buffer[10] = (block->sample_rate >> 12) & 0xff;
2551 buffer[11] = (block->sample_rate >> 4) & 0xff;
2552 buffer[12] = ((block->sample_rate & 0x0f) << 4) | (channels1 << 1) | (bps1 >> 4);
2553 buffer[13] = (FLAC__byte)(((bps1 & 0x0f) << 4) | ((block->total_samples >> 32) & 0x0f));
2554 pack_uint32_((FLAC__uint32)block->total_samples, buffer+14, 4);
2555 memcpy(buffer+18, block->md5sum, 16);
2557 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2563 FLAC__bool write_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Padding *block, unsigned block_length)
2565 unsigned i, n = block_length;
2566 FLAC__byte buffer[1024];
2570 memset(buffer, 0, 1024);
2572 for(i = 0; i < n/1024; i++)
2573 if(write_cb(buffer, 1, 1024, handle) != 1024)
2578 if(write_cb(buffer, 1, n, handle) != n)
2584 FLAC__bool write_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Application *block, unsigned block_length)
2586 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2588 if(write_cb(block->id, 1, id_bytes, handle) != id_bytes)
2591 block_length -= id_bytes;
2593 if(write_cb(block->data, 1, block_length, handle) != block_length)
2599 FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block)
2602 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2604 for(i = 0; i < block->num_points; i++) {
2605 /* some MAGIC NUMBERs here */
2606 pack_uint64_(block->points[i].sample_number, buffer, 8);
2607 pack_uint64_(block->points[i].stream_offset, buffer+8, 8);
2608 pack_uint32_(block->points[i].frame_samples, buffer+16, 2);
2609 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2616 FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block)
2619 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2620 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2621 FLAC__byte buffer[4]; /* magic number is asserted below */
2623 FLAC__ASSERT(flac_max(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN, FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8 == sizeof(buffer));
2625 pack_uint32_little_endian_(block->vendor_string.length, buffer, entry_length_len);
2626 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2628 if(write_cb(block->vendor_string.entry, 1, block->vendor_string.length, handle) != block->vendor_string.length)
2631 pack_uint32_little_endian_(block->num_comments, buffer, num_comments_len);
2632 if(write_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2635 for(i = 0; i < block->num_comments; i++) {
2636 pack_uint32_little_endian_(block->comments[i].length, buffer, entry_length_len);
2637 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2639 if(write_cb(block->comments[i].entry, 1, block->comments[i].length, handle) != block->comments[i].length)
2646 FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block)
2649 FLAC__byte buffer[1024]; /* asserted below that this is big enough */
2651 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2652 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN/8);
2653 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);
2654 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2656 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2657 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2658 if(write_cb(block->media_catalog_number, 1, len, handle) != len)
2661 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2662 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2663 pack_uint64_(block->lead_in, buffer, len);
2664 if(write_cb(buffer, 1, len, handle) != len)
2667 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2668 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2669 memset(buffer, 0, len);
2672 if(write_cb(buffer, 1, len, handle) != len)
2675 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2676 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2677 pack_uint32_(block->num_tracks, buffer, len);
2678 if(write_cb(buffer, 1, len, handle) != len)
2681 for(i = 0; i < block->num_tracks; i++) {
2682 FLAC__StreamMetadata_CueSheet_Track *track = block->tracks + i;
2684 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2685 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2686 pack_uint64_(track->offset, buffer, len);
2687 if(write_cb(buffer, 1, len, handle) != len)
2690 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2691 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2692 pack_uint32_(track->number, buffer, len);
2693 if(write_cb(buffer, 1, len, handle) != len)
2696 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2697 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2698 if(write_cb(track->isrc, 1, len, handle) != len)
2701 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);
2702 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2703 memset(buffer, 0, len);
2704 buffer[0] = (track->type << 7) | (track->pre_emphasis << 6);
2705 if(write_cb(buffer, 1, len, handle) != len)
2708 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2709 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2710 pack_uint32_(track->num_indices, buffer, len);
2711 if(write_cb(buffer, 1, len, handle) != len)
2714 for(j = 0; j < track->num_indices; j++) {
2715 FLAC__StreamMetadata_CueSheet_Index *indx = track->indices + j;
2717 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2718 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2719 pack_uint64_(indx->offset, buffer, len);
2720 if(write_cb(buffer, 1, len, handle) != len)
2723 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2724 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2725 pack_uint32_(indx->number, buffer, len);
2726 if(write_cb(buffer, 1, len, handle) != len)
2729 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2730 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2731 memset(buffer, 0, len);
2732 if(write_cb(buffer, 1, len, handle) != len)
2740 FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block)
2744 FLAC__byte buffer[4]; /* magic number is asserted below */
2746 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_TYPE_LEN%8);
2747 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN%8);
2748 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN%8);
2749 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN%8);
2750 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN%8);
2751 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN%8);
2752 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_COLORS_LEN%8);
2753 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN%8);
2754 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2755 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8);
2756 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8);
2757 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2758 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2759 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2760 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2761 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8);
2763 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8;
2764 pack_uint32_(block->type, buffer, len);
2765 if(write_cb(buffer, 1, len, handle) != len)
2768 len = FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8;
2769 slen = strlen(block->mime_type);
2770 pack_uint32_(slen, buffer, len);
2771 if(write_cb(buffer, 1, len, handle) != len)
2773 if(write_cb(block->mime_type, 1, slen, handle) != slen)
2776 len = FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8;
2777 slen = strlen((const char *)block->description);
2778 pack_uint32_(slen, buffer, len);
2779 if(write_cb(buffer, 1, len, handle) != len)
2781 if(write_cb(block->description, 1, slen, handle) != slen)
2784 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8;
2785 pack_uint32_(block->width, buffer, len);
2786 if(write_cb(buffer, 1, len, handle) != len)
2789 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8;
2790 pack_uint32_(block->height, buffer, len);
2791 if(write_cb(buffer, 1, len, handle) != len)
2794 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8;
2795 pack_uint32_(block->depth, buffer, len);
2796 if(write_cb(buffer, 1, len, handle) != len)
2799 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8;
2800 pack_uint32_(block->colors, buffer, len);
2801 if(write_cb(buffer, 1, len, handle) != len)
2804 len = FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8;
2805 pack_uint32_(block->data_length, buffer, len);
2806 if(write_cb(buffer, 1, len, handle) != len)
2808 if(write_cb(block->data, 1, block->data_length, handle) != block->data_length)
2814 FLAC__bool write_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2816 if(write_cb(block->data, 1, block_length, handle) != block_length)
2822 FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block)
2824 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2825 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2829 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2832 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2835 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2836 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2840 return read_metadata_block_header_(iterator);
2843 FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last)
2845 FLAC__StreamMetadata *padding;
2847 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2848 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2852 block->is_last = false;
2854 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2857 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2860 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
2861 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2863 padding->is_last = padding_is_last;
2864 padding->length = padding_length;
2866 if(!write_metadata_block_header_(iterator->file, &iterator->status, padding)) {
2867 FLAC__metadata_object_delete(padding);
2871 if(!write_metadata_block_data_(iterator->file, &iterator->status, padding)) {
2872 FLAC__metadata_object_delete(padding);
2876 FLAC__metadata_object_delete(padding);
2878 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2879 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2883 return read_metadata_block_header_(iterator);
2886 FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append)
2888 FILE *tempfile = NULL;
2889 char *tempfilename = NULL;
2890 int fixup_is_last_code = 0; /* 0 => no need to change any is_last flags */
2891 FLAC__off_t fixup_is_last_flag_offset = -1;
2893 FLAC__ASSERT(0 != block || append == false);
2895 if(iterator->is_last) {
2897 fixup_is_last_code = 1; /* 1 => clear the is_last flag at the following offset */
2898 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2900 else if(0 == block) {
2901 simple_iterator_push_(iterator);
2902 if(!FLAC__metadata_simple_iterator_prev(iterator)) {
2903 (void)simple_iterator_pop_(iterator);
2906 fixup_is_last_code = -1; /* -1 => set the is_last the flag at the following offset */
2907 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2908 if(!simple_iterator_pop_(iterator))
2913 if(!simple_iterator_copy_file_prefix_(iterator, &tempfile, &tempfilename, append))
2917 if(!write_metadata_block_header_(tempfile, &iterator->status, block)) {
2918 cleanup_tempfile_(&tempfile, &tempfilename);
2922 if(!write_metadata_block_data_(tempfile, &iterator->status, block)) {
2923 cleanup_tempfile_(&tempfile, &tempfilename);
2928 if(!simple_iterator_copy_file_postfix_(iterator, &tempfile, &tempfilename, fixup_is_last_code, fixup_is_last_flag_offset, block==0))
2932 return FLAC__metadata_simple_iterator_next(iterator);
2937 void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator)
2939 FLAC__ASSERT(iterator->depth+1 < SIMPLE_ITERATOR_MAX_PUSH_DEPTH);
2940 iterator->offset[iterator->depth+1] = iterator->offset[iterator->depth];
2944 FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator)
2946 FLAC__ASSERT(iterator->depth > 0);
2948 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2949 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2953 return read_metadata_block_header_(iterator);
2960 * 3: not a FLAC file
2962 unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb)
2964 FLAC__byte buffer[4];
2968 FLAC__ASSERT(FLAC__STREAM_SYNC_LENGTH == sizeof(buffer));
2970 /* skip any id3v2 tag */
2972 n = read_cb(buffer, 1, 4, handle);
2977 else if(0 == memcmp(buffer, "ID3", 3)) {
2978 unsigned tag_length = 0;
2980 /* skip to the tag length */
2981 if(seek_cb(handle, 2, SEEK_CUR) < 0)
2984 /* read the length */
2985 for(i = 0; i < 4; i++) {
2986 if(read_cb(buffer, 1, 1, handle) < 1 || buffer[0] & 0x80)
2989 tag_length |= (buffer[0] & 0x7f);
2992 /* skip the rest of the tag */
2993 if(seek_cb(handle, tag_length, SEEK_CUR) < 0)
2996 /* read the stream sync code */
2998 n = read_cb(buffer, 1, 4, handle);
3005 /* check for the fLaC signature */
3006 if(0 == memcmp(FLAC__STREAM_SYNC_STRING, buffer, FLAC__STREAM_SYNC_LENGTH))
3012 unsigned seek_to_first_metadata_block_(FILE *f)
3014 return seek_to_first_metadata_block_cb_((FLAC__IOHandle)f, (FLAC__IOCallback_Read)fread, fseek_wrapper_);
3017 FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append)
3019 const FLAC__off_t offset_end = append? iterator->offset[iterator->depth] + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length : iterator->offset[iterator->depth];
3021 if(0 != fseeko(iterator->file, 0, SEEK_SET)) {
3022 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3025 if(!open_tempfile_(iterator->filename, iterator->tempfile_path_prefix, tempfile, tempfilename, &iterator->status)) {
3026 cleanup_tempfile_(tempfile, tempfilename);
3029 if(!copy_n_bytes_from_file_(iterator->file, *tempfile, offset_end, &iterator->status)) {
3030 cleanup_tempfile_(tempfile, tempfilename);
3037 FLAC__bool simple_iterator_copy_file_postfix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, int fixup_is_last_code, FLAC__off_t fixup_is_last_flag_offset, FLAC__bool backup)
3039 FLAC__off_t save_offset = iterator->offset[iterator->depth];
3040 FLAC__ASSERT(0 != *tempfile);
3042 if(0 != fseeko(iterator->file, save_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length, SEEK_SET)) {
3043 cleanup_tempfile_(tempfile, tempfilename);
3044 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3047 if(!copy_remaining_bytes_from_file_(iterator->file, *tempfile, &iterator->status)) {
3048 cleanup_tempfile_(tempfile, tempfilename);
3052 if(fixup_is_last_code != 0) {
3054 * if code == 1, it means a block was appended to the end so
3055 * we have to clear the is_last flag of the previous block
3056 * if code == -1, it means the last block was deleted so
3057 * we have to set the is_last flag of the previous block
3059 /* MAGIC NUMBERs here; we know the is_last flag is the high bit of the byte at this location */
3061 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3062 cleanup_tempfile_(tempfile, tempfilename);
3063 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3066 if(fread(&x, 1, 1, *tempfile) != 1) {
3067 cleanup_tempfile_(tempfile, tempfilename);
3068 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3071 if(fixup_is_last_code > 0) {
3072 FLAC__ASSERT(x & 0x80);
3076 FLAC__ASSERT(!(x & 0x80));
3079 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3080 cleanup_tempfile_(tempfile, tempfilename);
3081 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3084 if(local__fwrite(&x, 1, 1, *tempfile) != 1) {
3085 cleanup_tempfile_(tempfile, tempfilename);
3086 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3091 (void)fclose(iterator->file);
3093 if(!transport_tempfile_(iterator->filename, tempfile, tempfilename, &iterator->status))
3096 if(iterator->has_stats)
3097 set_file_stats_(iterator->filename, &iterator->stats);
3099 if(!simple_iterator_prime_input_(iterator, !iterator->is_writable))
3102 while(iterator->offset[iterator->depth] + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length < save_offset)
3103 if(!FLAC__metadata_simple_iterator_next(iterator))
3108 /* move the iterator to it's original block faster by faking a push, then doing a pop_ */
3109 FLAC__ASSERT(iterator->depth == 0);
3110 iterator->offset[0] = save_offset;
3112 return simple_iterator_pop_(iterator);
3116 FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status)
3118 FLAC__byte buffer[8192];
3121 FLAC__ASSERT(bytes >= 0);
3123 n = flac_min(sizeof(buffer), (size_t)bytes);
3124 if(fread(buffer, 1, n, file) != n) {
3125 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3128 if(local__fwrite(buffer, 1, n, tempfile) != n) {
3129 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3138 FLAC__bool copy_n_bytes_from_file_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOHandle temp_handle, FLAC__IOCallback_Write temp_write_cb, FLAC__off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status)
3140 FLAC__byte buffer[8192];
3143 FLAC__ASSERT(bytes >= 0);
3145 n = flac_min(sizeof(buffer), (size_t)bytes);
3146 if(read_cb(buffer, 1, n, handle) != n) {
3147 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3150 if(temp_write_cb(buffer, 1, n, temp_handle) != n) {
3151 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3160 FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status)
3162 FLAC__byte buffer[8192];
3165 while(!feof(file)) {
3166 n = fread(buffer, 1, sizeof(buffer), file);
3167 if(n == 0 && !feof(file)) {
3168 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3171 if(n > 0 && local__fwrite(buffer, 1, n, tempfile) != n) {
3172 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3180 FLAC__bool copy_remaining_bytes_from_file_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Eof eof_cb, FLAC__IOHandle temp_handle, FLAC__IOCallback_Write temp_write_cb, FLAC__Metadata_SimpleIteratorStatus *status)
3182 FLAC__byte buffer[8192];
3185 while(!eof_cb(handle)) {
3186 n = read_cb(buffer, 1, sizeof(buffer), handle);
3187 if(n == 0 && !eof_cb(handle)) {
3188 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3191 if(n > 0 && temp_write_cb(buffer, 1, n, temp_handle) != n) {
3192 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3201 local_snprintf(char *str, size_t size, const char *fmt, ...)
3209 rc = vsnprintf_s (str, size, _TRUNCATE, fmt, va);
3210 rc = (rc > 0) ? rc : (size == 0 ? 1024 : size * 2);
3212 rc = vsnprintf (str, size, fmt, va);
3219 FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3221 static const char *tempfile_suffix = ".metadata_edit";
3222 if(0 == tempfile_path_prefix) {
3223 size_t dest_len = strlen(filename) + strlen(tempfile_suffix) + 1;
3224 if(0 == (*tempfilename = safe_malloc_(dest_len))) {
3225 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3228 local_snprintf(*tempfilename, dest_len, "%s%s", filename, tempfile_suffix);
3231 const char *p = strrchr(filename, '/');
3238 dest_len = strlen(tempfile_path_prefix) + strlen(p) + strlen(tempfile_suffix) + 2;
3240 if(0 == (*tempfilename = safe_malloc_(dest_len))) {
3241 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3244 local_snprintf(*tempfilename, dest_len, "%s/%s%s", tempfile_path_prefix, p, tempfile_suffix);
3247 if(0 == (*tempfile = flac_fopen(*tempfilename, "w+b"))) {
3248 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
3255 FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3257 FLAC__ASSERT(0 != filename);
3258 FLAC__ASSERT(0 != tempfile);
3259 FLAC__ASSERT(0 != *tempfile);
3260 FLAC__ASSERT(0 != tempfilename);
3261 FLAC__ASSERT(0 != *tempfilename);
3262 FLAC__ASSERT(0 != status);
3264 (void)fclose(*tempfile);
3267 #if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__ || defined __EMX__
3268 /* on some flavors of windows, flac_rename() will fail if the destination already exists */
3269 if(flac_unlink(filename) < 0) {
3270 cleanup_tempfile_(tempfile, tempfilename);
3271 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR;
3276 /*@@@ to fully support the tempfile_path_prefix we need to update this piece to actually copy across filesystems instead of just flac_rename(): */
3277 if(0 != flac_rename(*tempfilename, filename)) {
3278 cleanup_tempfile_(tempfile, tempfilename);
3279 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR;
3283 cleanup_tempfile_(tempfile, tempfilename);
3288 void cleanup_tempfile_(FILE **tempfile, char **tempfilename)
3290 if(0 != *tempfile) {
3291 (void)fclose(*tempfile);
3295 if(0 != *tempfilename) {
3296 (void)flac_unlink(*tempfilename);
3297 free(*tempfilename);
3302 FLAC__bool get_file_stats_(const char *filename, struct flac_stat_s *stats)
3304 FLAC__ASSERT(0 != filename);
3305 FLAC__ASSERT(0 != stats);
3306 return (0 == flac_stat(filename, stats));
3309 void set_file_stats_(const char *filename, struct flac_stat_s *stats)
3311 struct utimbuf srctime;
3313 FLAC__ASSERT(0 != filename);
3314 FLAC__ASSERT(0 != stats);
3316 srctime.actime = stats->st_atime;
3317 srctime.modtime = stats->st_mtime;
3318 (void)flac_chmod(filename, stats->st_mode);
3319 (void)flac_utime(filename, &srctime);
3320 #if !defined _MSC_VER && !defined __BORLANDC__ && !defined __MINGW32__
3321 FLAC_CHECK_RETURN(chown(filename, stats->st_uid, -1));
3322 FLAC_CHECK_RETURN(chown(filename, -1, stats->st_gid));
3326 int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence)
3328 return fseeko((FILE*)handle, (FLAC__off_t)offset, whence);
3331 FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle)
3333 return ftello((FILE*)handle);
3336 FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status)
3339 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK:
3340 return FLAC__METADATA_CHAIN_STATUS_OK;
3341 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT:
3342 return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT;
3343 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE:
3344 return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
3345 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE:
3346 return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
3347 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE:
3348 return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE;
3349 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA:
3350 return FLAC__METADATA_CHAIN_STATUS_BAD_METADATA;
3351 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR:
3352 return FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
3353 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR:
3354 return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
3355 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR:
3356 return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
3357 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR:
3358 return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR;
3359 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR:
3360 return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR;
3361 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR:
3362 return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
3363 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR:
3365 return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;