1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2001,2002,2003,2004,2005,2006,2007,2008,2009 Josh Coalson
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * - Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * - Neither the name of the Xiph.org Foundation nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 #include <sys/stat.h> /* for stat(), maybe chmod() */
44 #include "private/metadata.h"
46 #include "FLAC/assert.h"
47 #include "FLAC/stream_decoder.h"
48 #include "share/alloc.h"
49 #include "share/compat.h"
50 #include "share/macros.h"
51 #include "share/safe_str.h"
52 #include "private/macros.h"
53 #include "private/memory.h"
55 /* Alias the first (in share/alloc.h) to the second (in src/libFLAC/memory.c). */
56 #define safe_malloc_mul_2op_ safe_malloc_mul_2op_p
58 /****************************************************************************
60 * Local function declarations
62 ***************************************************************************/
64 static void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
65 static void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
66 static void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes);
67 static FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes);
68 static FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes);
69 static FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes);
71 static FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator);
72 static FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block);
73 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);
74 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);
75 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block);
76 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);
77 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);
78 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);
79 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);
80 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment *block);
81 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track);
82 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block);
83 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block);
84 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);
86 static FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
87 static FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
88 static FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
89 static FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
90 static FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block);
91 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);
92 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);
93 static FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block);
94 static FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block);
95 static FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block);
96 static FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block);
97 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);
99 static FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block);
100 static FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last);
101 static FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append);
103 static void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator);
104 static FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator);
106 static unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb);
107 static unsigned seek_to_first_metadata_block_(FILE *f);
109 static FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append);
110 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);
112 static FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status);
113 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);
114 static FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status);
115 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);
117 static FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
118 static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
119 static void cleanup_tempfile_(FILE **tempfile, char **tempfilename);
121 static FLAC__bool get_file_stats_(const char *filename, struct flac_stat_s *stats);
122 static void set_file_stats_(const char *filename, struct flac_stat_s *stats);
124 static int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence);
125 static FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle);
127 static FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status);
130 #ifdef FLAC__VALGRIND_TESTING
131 static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
133 size_t ret = fwrite(ptr, size, nmemb, stream);
139 #define local__fwrite fwrite
142 /****************************************************************************
144 * Level 0 implementation
146 ***************************************************************************/
148 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
149 static void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
150 static void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
153 FLAC__bool got_error;
154 FLAC__StreamMetadata *object;
155 } level0_client_data;
157 static FLAC__StreamMetadata *get_one_metadata_block_(const char *filename, FLAC__MetadataType type)
159 level0_client_data cd;
160 FLAC__StreamDecoder *decoder;
162 FLAC__ASSERT(0 != filename);
164 cd.got_error = false;
167 decoder = FLAC__stream_decoder_new();
172 FLAC__stream_decoder_set_md5_checking(decoder, false);
173 FLAC__stream_decoder_set_metadata_ignore_all(decoder);
174 FLAC__stream_decoder_set_metadata_respond(decoder, type);
176 if(FLAC__stream_decoder_init_file(decoder, filename, write_callback_, metadata_callback_, error_callback_, &cd) != FLAC__STREAM_DECODER_INIT_STATUS_OK || cd.got_error) {
177 (void)FLAC__stream_decoder_finish(decoder);
178 FLAC__stream_decoder_delete(decoder);
182 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder) || cd.got_error) {
183 (void)FLAC__stream_decoder_finish(decoder);
184 FLAC__stream_decoder_delete(decoder);
186 FLAC__metadata_object_delete(cd.object);
190 (void)FLAC__stream_decoder_finish(decoder);
191 FLAC__stream_decoder_delete(decoder);
196 FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo)
198 FLAC__StreamMetadata *object;
200 FLAC__ASSERT(0 != filename);
201 FLAC__ASSERT(0 != streaminfo);
203 object = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_STREAMINFO);
206 /* can just copy the contents since STREAMINFO has no internal structure */
207 *streaminfo = *object;
208 FLAC__metadata_object_delete(object);
216 FLAC_API FLAC__bool FLAC__metadata_get_tags(const char *filename, FLAC__StreamMetadata **tags)
218 FLAC__ASSERT(0 != filename);
219 FLAC__ASSERT(0 != tags);
221 *tags = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_VORBIS_COMMENT);
226 FLAC_API FLAC__bool FLAC__metadata_get_cuesheet(const char *filename, FLAC__StreamMetadata **cuesheet)
228 FLAC__ASSERT(0 != filename);
229 FLAC__ASSERT(0 != cuesheet);
231 *cuesheet = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_CUESHEET);
233 return 0 != *cuesheet;
236 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
238 (void)decoder, (void)frame, (void)buffer, (void)client_data;
240 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
243 void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
245 level0_client_data *cd = (level0_client_data *)client_data;
249 * we assume we only get here when the one metadata block we were
250 * looking for was passed to us
252 if(!cd->got_error && 0 == cd->object) {
253 if(0 == (cd->object = FLAC__metadata_object_clone(metadata)))
254 cd->got_error = true;
258 void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
260 level0_client_data *cd = (level0_client_data *)client_data;
263 if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
264 cd->got_error = true;
267 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)
269 FLAC__Metadata_SimpleIterator *it;
270 FLAC__uint64 max_area_seen = 0;
271 FLAC__uint64 max_depth_seen = 0;
273 FLAC__ASSERT(0 != filename);
274 FLAC__ASSERT(0 != picture);
278 it = FLAC__metadata_simple_iterator_new();
281 if(!FLAC__metadata_simple_iterator_init(it, filename, /*read_only=*/true, /*preserve_file_stats=*/true)) {
282 FLAC__metadata_simple_iterator_delete(it);
286 if(FLAC__metadata_simple_iterator_get_block_type(it) == FLAC__METADATA_TYPE_PICTURE) {
287 FLAC__StreamMetadata *obj = FLAC__metadata_simple_iterator_get_block(it);
288 FLAC__uint64 area = (FLAC__uint64)obj->data.picture.width * (FLAC__uint64)obj->data.picture.height;
289 /* check constraints */
291 (type == (FLAC__StreamMetadata_Picture_Type)(-1) || type == obj->data.picture.type) &&
292 (mime_type == 0 || !strcmp(mime_type, obj->data.picture.mime_type)) &&
293 (description == 0 || !strcmp((const char *)description, (const char *)obj->data.picture.description)) &&
294 obj->data.picture.width <= max_width &&
295 obj->data.picture.height <= max_height &&
296 obj->data.picture.depth <= max_depth &&
297 obj->data.picture.colors <= max_colors &&
298 (area > max_area_seen || (area == max_area_seen && obj->data.picture.depth > max_depth_seen))
301 FLAC__metadata_object_delete(*picture);
303 max_area_seen = area;
304 max_depth_seen = obj->data.picture.depth;
307 FLAC__metadata_object_delete(obj);
310 } while(FLAC__metadata_simple_iterator_next(it));
312 FLAC__metadata_simple_iterator_delete(it);
314 return (0 != *picture);
318 /****************************************************************************
320 * Level 1 implementation
322 ***************************************************************************/
324 #define SIMPLE_ITERATOR_MAX_PUSH_DEPTH (1+4)
325 /* 1 for initial offset, +4 for our own personal use */
327 struct FLAC__Metadata_SimpleIterator {
329 char *filename, *tempfile_path_prefix;
330 struct flac_stat_s stats;
331 FLAC__bool has_stats;
332 FLAC__bool is_writable;
333 FLAC__Metadata_SimpleIteratorStatus status;
334 FLAC__off_t offset[SIMPLE_ITERATOR_MAX_PUSH_DEPTH];
335 FLAC__off_t first_offset; /* this is the offset to the STREAMINFO block */
337 /* this is the metadata block header of the current block we are pointing to: */
339 FLAC__MetadataType type;
343 FLAC_API const char * const FLAC__Metadata_SimpleIteratorStatusString[] = {
344 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK",
345 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT",
346 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE",
347 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE",
348 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE",
349 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA",
350 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR",
351 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR",
352 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR",
353 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR",
354 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR",
355 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR",
356 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR"
360 FLAC_API FLAC__Metadata_SimpleIterator *FLAC__metadata_simple_iterator_new(void)
362 FLAC__Metadata_SimpleIterator *iterator = calloc(1, sizeof(FLAC__Metadata_SimpleIterator));
366 iterator->filename = 0;
367 iterator->tempfile_path_prefix = 0;
368 iterator->has_stats = false;
369 iterator->is_writable = false;
370 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
371 iterator->first_offset = iterator->offset[0] = -1;
378 static void simple_iterator_free_guts_(FLAC__Metadata_SimpleIterator *iterator)
380 FLAC__ASSERT(0 != iterator);
382 if(0 != iterator->file) {
383 fclose(iterator->file);
385 if(iterator->has_stats)
386 set_file_stats_(iterator->filename, &iterator->stats);
388 if(0 != iterator->filename) {
389 free(iterator->filename);
390 iterator->filename = 0;
392 if(0 != iterator->tempfile_path_prefix) {
393 free(iterator->tempfile_path_prefix);
394 iterator->tempfile_path_prefix = 0;
398 FLAC_API void FLAC__metadata_simple_iterator_delete(FLAC__Metadata_SimpleIterator *iterator)
400 FLAC__ASSERT(0 != iterator);
402 simple_iterator_free_guts_(iterator);
406 FLAC_API FLAC__Metadata_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__Metadata_SimpleIterator *iterator)
408 FLAC__Metadata_SimpleIteratorStatus status;
410 FLAC__ASSERT(0 != iterator);
412 status = iterator->status;
413 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
417 static FLAC__bool simple_iterator_prime_input_(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool read_only)
421 FLAC__ASSERT(0 != iterator);
423 if(read_only || 0 == (iterator->file = flac_fopen(iterator->filename, "r+b"))) {
424 iterator->is_writable = false;
425 if(read_only || errno == EACCES) {
426 if(0 == (iterator->file = flac_fopen(iterator->filename, "rb"))) {
427 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
432 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
437 iterator->is_writable = true;
440 ret = seek_to_first_metadata_block_(iterator->file);
444 iterator->first_offset = iterator->offset[iterator->depth] = ftello(iterator->file);
445 return read_metadata_block_header_(iterator);
447 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
450 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
453 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE;
462 @@@ If we decide to finish implementing this, put this comment back in metadata.h
464 * The 'tempfile_path_prefix' allows you to specify a directory where
465 * tempfiles should go. Remember that if your metadata edits cause the
466 * FLAC file to grow, the entire file will have to be rewritten. If
467 * 'tempfile_path_prefix' is NULL, the temp file will be written in the
468 * same directory as the original FLAC file. This makes replacing the
469 * original with the tempfile fast but requires extra space in the same
470 * partition for the tempfile. If space is a problem, you can pass a
471 * directory name belonging to a different partition in
472 * 'tempfile_path_prefix'. Note that you should use the forward slash
473 * '/' as the directory separator. A trailing slash is not needed; it
474 * will be added automatically.
476 FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats, const char *tempfile_path_prefix);
479 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)
481 const char *tempfile_path_prefix = 0; /*@@@ search for comments near 'flac_rename(...)' for what it will take to finish implementing this */
483 FLAC__ASSERT(0 != iterator);
484 FLAC__ASSERT(0 != filename);
486 simple_iterator_free_guts_(iterator);
488 if(!read_only && preserve_file_stats)
489 iterator->has_stats = get_file_stats_(filename, &iterator->stats);
491 if(0 == (iterator->filename = strdup(filename))) {
492 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
495 if(0 != tempfile_path_prefix && 0 == (iterator->tempfile_path_prefix = strdup(tempfile_path_prefix))) {
496 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
500 return simple_iterator_prime_input_(iterator, read_only);
503 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__Metadata_SimpleIterator *iterator)
505 FLAC__ASSERT(0 != iterator);
506 FLAC__ASSERT(0 != iterator->file);
508 return iterator->is_writable;
511 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__Metadata_SimpleIterator *iterator)
513 FLAC__ASSERT(0 != iterator);
514 FLAC__ASSERT(0 != iterator->file);
516 if(iterator->is_last)
519 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
520 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
524 iterator->offset[iterator->depth] = ftello(iterator->file);
526 return read_metadata_block_header_(iterator);
529 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__Metadata_SimpleIterator *iterator)
531 FLAC__off_t this_offset;
533 FLAC__ASSERT(0 != iterator);
534 FLAC__ASSERT(0 != iterator->file);
536 if(iterator->offset[iterator->depth] == iterator->first_offset)
539 if(0 != fseeko(iterator->file, iterator->first_offset, SEEK_SET)) {
540 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
543 this_offset = iterator->first_offset;
544 if(!read_metadata_block_header_(iterator))
547 /* we ignore any error from ftello() and catch it in fseeko() */
548 while(ftello(iterator->file) + (FLAC__off_t)iterator->length < iterator->offset[iterator->depth]) {
549 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
550 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
553 this_offset = ftello(iterator->file);
554 if(!read_metadata_block_header_(iterator))
558 iterator->offset[iterator->depth] = this_offset;
564 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_last(const FLAC__Metadata_SimpleIterator *iterator)
566 FLAC__ASSERT(0 != iterator);
567 FLAC__ASSERT(0 != iterator->file);
569 return iterator->is_last;
573 FLAC_API off_t FLAC__metadata_simple_iterator_get_block_offset(const FLAC__Metadata_SimpleIterator *iterator)
575 FLAC__ASSERT(0 != iterator);
576 FLAC__ASSERT(0 != iterator->file);
578 return iterator->offset[iterator->depth];
581 FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator)
583 FLAC__ASSERT(0 != iterator);
584 FLAC__ASSERT(0 != iterator->file);
586 return iterator->type;
590 FLAC_API unsigned FLAC__metadata_simple_iterator_get_block_length(const FLAC__Metadata_SimpleIterator *iterator)
592 FLAC__ASSERT(0 != iterator);
593 FLAC__ASSERT(0 != iterator->file);
595 return iterator->length;
599 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_get_application_id(FLAC__Metadata_SimpleIterator *iterator, FLAC__byte *id)
601 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
603 FLAC__ASSERT(0 != iterator);
604 FLAC__ASSERT(0 != iterator->file);
605 FLAC__ASSERT(0 != id);
607 if(iterator->type != FLAC__METADATA_TYPE_APPLICATION) {
608 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
612 if(fread(id, 1, id_bytes, iterator->file) != id_bytes) {
613 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
618 if(0 != fseeko(iterator->file, -((int)id_bytes), SEEK_CUR)) {
619 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
626 FLAC_API FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator)
628 FLAC__StreamMetadata *block = FLAC__metadata_object_new(iterator->type);
630 FLAC__ASSERT(0 != iterator);
631 FLAC__ASSERT(0 != iterator->file);
634 block->is_last = iterator->is_last;
635 block->length = iterator->length;
637 if(!read_metadata_block_data_(iterator, block)) {
638 FLAC__metadata_object_delete(block);
642 /* back up to the beginning of the block data to stay consistent */
643 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH, SEEK_SET)) {
644 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
645 FLAC__metadata_object_delete(block);
650 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
655 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
657 FLAC__ASSERT_DECLARATION(FLAC__off_t debug_target_offset = iterator->offset[iterator->depth];)
660 FLAC__ASSERT(0 != iterator);
661 FLAC__ASSERT(0 != iterator->file);
662 FLAC__ASSERT(0 != block);
664 if(!iterator->is_writable) {
665 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
669 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO || block->type == FLAC__METADATA_TYPE_STREAMINFO) {
670 if(iterator->type != block->type) {
671 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
676 block->is_last = iterator->is_last;
678 if(iterator->length == block->length)
679 return write_metadata_block_stationary_(iterator, block);
680 else if(iterator->length > block->length) {
681 if(use_padding && iterator->length >= FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) {
682 ret = write_metadata_block_stationary_with_padding_(iterator, block, iterator->length - FLAC__STREAM_METADATA_HEADER_LENGTH - block->length, block->is_last);
683 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
684 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
688 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
689 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
690 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
694 else /* iterator->length < block->length */ {
695 unsigned padding_leftover = 0;
696 FLAC__bool padding_is_last = false;
698 /* first see if we can even use padding */
699 if(iterator->is_last) {
703 const unsigned extra_padding_bytes_required = block->length - iterator->length;
704 simple_iterator_push_(iterator);
705 if(!FLAC__metadata_simple_iterator_next(iterator)) {
706 (void)simple_iterator_pop_(iterator);
709 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
713 if(FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length == extra_padding_bytes_required) {
714 padding_leftover = 0;
715 block->is_last = iterator->is_last;
717 else if(iterator->length < extra_padding_bytes_required)
720 padding_leftover = FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length - extra_padding_bytes_required;
721 padding_is_last = iterator->is_last;
722 block->is_last = false;
725 if(!simple_iterator_pop_(iterator))
730 if(padding_leftover == 0) {
731 ret = write_metadata_block_stationary_(iterator, block);
732 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
733 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
737 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
738 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
739 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
740 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
745 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
746 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
747 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
753 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
755 unsigned padding_leftover = 0;
756 FLAC__bool padding_is_last = false;
758 FLAC__ASSERT_DECLARATION(FLAC__off_t debug_target_offset = iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length;)
761 FLAC__ASSERT(0 != iterator);
762 FLAC__ASSERT(0 != iterator->file);
763 FLAC__ASSERT(0 != block);
765 if(!iterator->is_writable)
768 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
769 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
773 block->is_last = iterator->is_last;
776 /* first see if we can even use padding */
777 if(iterator->is_last) {
781 simple_iterator_push_(iterator);
782 if(!FLAC__metadata_simple_iterator_next(iterator)) {
783 (void)simple_iterator_pop_(iterator);
786 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
790 if(iterator->length == block->length) {
791 padding_leftover = 0;
792 block->is_last = iterator->is_last;
794 else if(iterator->length < FLAC__STREAM_METADATA_HEADER_LENGTH + block->length)
797 padding_leftover = iterator->length - block->length;
798 padding_is_last = iterator->is_last;
799 block->is_last = false;
802 if(!simple_iterator_pop_(iterator))
807 /* move to the next block, which is suitable padding */
808 if(!FLAC__metadata_simple_iterator_next(iterator))
810 if(padding_leftover == 0) {
811 ret = write_metadata_block_stationary_(iterator, block);
812 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
813 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
817 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
818 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
819 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
820 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
825 ret = rewrite_whole_file_(iterator, block, /*append=*/true);
826 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
827 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
832 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool use_padding)
834 FLAC__ASSERT_DECLARATION(FLAC__off_t debug_target_offset = iterator->offset[iterator->depth];)
837 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO) {
838 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
843 FLAC__StreamMetadata *padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
845 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
848 padding->length = iterator->length;
849 if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false)) {
850 FLAC__metadata_object_delete(padding);
853 FLAC__metadata_object_delete(padding);
854 if(!FLAC__metadata_simple_iterator_prev(iterator))
856 FLAC__ASSERT(iterator->offset[iterator->depth] + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length == debug_target_offset);
857 FLAC__ASSERT(ftello(iterator->file) + (FLAC__off_t)iterator->length == debug_target_offset);
861 ret = rewrite_whole_file_(iterator, 0, /*append=*/false);
862 FLAC__ASSERT(iterator->offset[iterator->depth] + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length == debug_target_offset);
863 FLAC__ASSERT(ftello(iterator->file) + (FLAC__off_t)iterator->length == debug_target_offset);
870 /****************************************************************************
872 * Level 2 implementation
874 ***************************************************************************/
877 typedef struct FLAC__Metadata_Node {
878 FLAC__StreamMetadata *data;
879 struct FLAC__Metadata_Node *prev, *next;
880 } FLAC__Metadata_Node;
882 struct FLAC__Metadata_Chain {
883 char *filename; /* will be NULL if using callbacks */
885 FLAC__Metadata_Node *head;
886 FLAC__Metadata_Node *tail;
888 FLAC__Metadata_ChainStatus status;
889 FLAC__off_t first_offset, last_offset;
891 * This is the length of the chain initially read from the FLAC file.
892 * it is used to compare against the current length to decide whether
893 * or not the whole file has to be rewritten.
895 FLAC__off_t initial_length;
896 /* @@@ hacky, these are currently only needed by ogg reader */
897 FLAC__IOHandle handle;
898 FLAC__IOCallback_Read read_cb;
901 struct FLAC__Metadata_Iterator {
902 FLAC__Metadata_Chain *chain;
903 FLAC__Metadata_Node *current;
906 FLAC_API const char * const FLAC__Metadata_ChainStatusString[] = {
907 "FLAC__METADATA_CHAIN_STATUS_OK",
908 "FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT",
909 "FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE",
910 "FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE",
911 "FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE",
912 "FLAC__METADATA_CHAIN_STATUS_BAD_METADATA",
913 "FLAC__METADATA_CHAIN_STATUS_READ_ERROR",
914 "FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR",
915 "FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR",
916 "FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR",
917 "FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR",
918 "FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR",
919 "FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR",
920 "FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS",
921 "FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH",
922 "FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL"
926 static FLAC__Metadata_Node *node_new_(void)
928 return calloc(1, sizeof(FLAC__Metadata_Node));
931 static void node_delete_(FLAC__Metadata_Node *node)
933 FLAC__ASSERT(0 != node);
935 FLAC__metadata_object_delete(node->data);
939 static void chain_init_(FLAC__Metadata_Chain *chain)
941 FLAC__ASSERT(0 != chain);
944 chain->is_ogg = false;
945 chain->head = chain->tail = 0;
947 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
948 chain->initial_length = 0;
952 static void chain_clear_(FLAC__Metadata_Chain *chain)
954 FLAC__Metadata_Node *node, *next;
956 FLAC__ASSERT(0 != chain);
958 for(node = chain->head; node; ) {
964 if(0 != chain->filename)
965 free(chain->filename);
970 static void chain_append_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
972 FLAC__ASSERT(0 != chain);
973 FLAC__ASSERT(0 != node);
974 FLAC__ASSERT(0 != node->data);
976 node->next = node->prev = 0;
977 node->data->is_last = true;
979 chain->tail->data->is_last = false;
984 FLAC__ASSERT(0 != chain->tail);
985 chain->tail->next = node;
986 node->prev = chain->tail;
992 static void chain_remove_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
994 FLAC__ASSERT(0 != chain);
995 FLAC__ASSERT(0 != node);
997 if(node == chain->head)
998 chain->head = node->next;
1000 node->prev->next = node->next;
1002 if(node == chain->tail)
1003 chain->tail = node->prev;
1005 node->next->prev = node->prev;
1007 if(0 != chain->tail)
1008 chain->tail->data->is_last = true;
1013 static void chain_delete_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1015 chain_remove_node_(chain, node);
1019 static FLAC__off_t chain_calculate_length_(FLAC__Metadata_Chain *chain)
1021 const FLAC__Metadata_Node *node;
1022 FLAC__off_t length = 0;
1023 for(node = chain->head; node; node = node->next)
1024 length += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1028 static void iterator_insert_node_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1030 FLAC__ASSERT(0 != node);
1031 FLAC__ASSERT(0 != node->data);
1032 FLAC__ASSERT(0 != iterator);
1033 FLAC__ASSERT(0 != iterator->current);
1034 FLAC__ASSERT(0 != iterator->chain);
1035 FLAC__ASSERT(0 != iterator->chain->head);
1036 FLAC__ASSERT(0 != iterator->chain->tail);
1038 node->data->is_last = false;
1040 node->prev = iterator->current->prev;
1041 node->next = iterator->current;
1044 iterator->chain->head = node;
1046 node->prev->next = node;
1048 iterator->current->prev = node;
1050 iterator->chain->nodes++;
1053 static void iterator_insert_node_after_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1055 FLAC__ASSERT(0 != node);
1056 FLAC__ASSERT(0 != node->data);
1057 FLAC__ASSERT(0 != iterator);
1058 FLAC__ASSERT(0 != iterator->current);
1059 FLAC__ASSERT(0 != iterator->chain);
1060 FLAC__ASSERT(0 != iterator->chain->head);
1061 FLAC__ASSERT(0 != iterator->chain->tail);
1063 iterator->current->data->is_last = false;
1065 node->prev = iterator->current;
1066 node->next = iterator->current->next;
1069 iterator->chain->tail = node;
1071 node->next->prev = node;
1073 node->prev->next = node;
1075 iterator->chain->tail->data->is_last = true;
1077 iterator->chain->nodes++;
1080 /* return true iff node and node->next are both padding */
1081 static FLAC__bool chain_merge_adjacent_padding_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1083 if(node->data->type == FLAC__METADATA_TYPE_PADDING && 0 != node->next && node->next->data->type == FLAC__METADATA_TYPE_PADDING) {
1084 const unsigned growth = FLAC__STREAM_METADATA_HEADER_LENGTH + node->next->data->length;
1085 node->data->length += growth;
1087 chain_delete_node_(chain, node->next);
1094 /* Returns the new length of the chain, or 0 if there was an error. */
1095 /* WATCHOUT: This can get called multiple times before a write, so
1096 * it should still work when this happens.
1098 /* WATCHOUT: Make sure to also update the logic in
1099 * FLAC__metadata_chain_check_if_tempfile_needed() if the logic here changes.
1101 static FLAC__off_t chain_prepare_for_write_(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1103 FLAC__off_t current_length = chain_calculate_length_(chain);
1106 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1107 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1108 const FLAC__off_t delta = chain->initial_length - current_length;
1109 chain->tail->data->length += delta;
1110 current_length += delta;
1111 FLAC__ASSERT(current_length == chain->initial_length);
1113 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1114 else if(current_length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) {
1115 FLAC__StreamMetadata *padding;
1116 FLAC__Metadata_Node *node;
1117 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) {
1118 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1121 padding->length = chain->initial_length - (FLAC__STREAM_METADATA_HEADER_LENGTH + current_length);
1122 if(0 == (node = node_new_())) {
1123 FLAC__metadata_object_delete(padding);
1124 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1127 node->data = padding;
1128 chain_append_node_(chain, node);
1129 current_length = chain_calculate_length_(chain);
1130 FLAC__ASSERT(current_length == chain->initial_length);
1132 /* 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 */
1133 else if(current_length > chain->initial_length) {
1134 const FLAC__off_t delta = current_length - chain->initial_length;
1135 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1136 /* if the delta is exactly the size of the last padding block, remove the padding block */
1137 if((FLAC__off_t)chain->tail->data->length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta) {
1138 chain_delete_node_(chain, chain->tail);
1139 current_length = chain_calculate_length_(chain);
1140 FLAC__ASSERT(current_length == chain->initial_length);
1142 /* if there is at least 'delta' bytes of padding, trim the padding down */
1143 else if((FLAC__off_t)chain->tail->data->length >= delta) {
1144 chain->tail->data->length -= delta;
1145 current_length -= delta;
1146 FLAC__ASSERT(current_length == chain->initial_length);
1152 return current_length;
1155 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)
1157 FLAC__Metadata_Node *node;
1159 FLAC__ASSERT(0 != chain);
1161 /* we assume we're already at the beginning of the file */
1163 switch(seek_to_first_metadata_block_cb_(handle, read_cb, seek_cb)) {
1167 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1170 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1173 chain->status = FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
1181 FLAC__int64 pos = tell_cb(handle);
1183 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1186 chain->first_offset = (FLAC__off_t)pos;
1191 FLAC__MetadataType type;
1197 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1201 if(!read_metadata_block_header_cb_(handle, read_cb, &is_last, &type, &length)) {
1203 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1207 node->data = FLAC__metadata_object_new(type);
1208 if(0 == node->data) {
1210 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1214 node->data->is_last = is_last;
1215 node->data->length = length;
1217 chain->status = get_equivalent_status_(read_metadata_block_data_cb_(handle, read_cb, seek_cb, node->data));
1218 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1222 chain_append_node_(chain, node);
1227 FLAC__int64 pos = tell_cb(handle);
1229 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1232 chain->last_offset = (FLAC__off_t)pos;
1235 chain->initial_length = chain_calculate_length_(chain);
1240 static FLAC__StreamDecoderReadStatus chain_read_ogg_read_cb_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
1242 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1244 if(*bytes > 0 && chain->status == FLAC__METADATA_CHAIN_STATUS_OK) {
1245 *bytes = chain->read_cb(buffer, sizeof(FLAC__byte), *bytes, chain->handle);
1247 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
1249 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
1252 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
1255 static FLAC__StreamDecoderWriteStatus chain_read_ogg_write_cb_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
1257 (void)decoder, (void)frame, (void)buffer, (void)client_data;
1258 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1261 static void chain_read_ogg_metadata_cb_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
1263 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1264 FLAC__Metadata_Node *node;
1270 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1274 node->data = FLAC__metadata_object_clone(metadata);
1275 if(0 == node->data) {
1277 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1281 chain_append_node_(chain, node);
1284 static void chain_read_ogg_error_cb_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1286 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1287 (void)decoder, (void)status;
1288 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1291 static FLAC__bool chain_read_ogg_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb)
1293 FLAC__StreamDecoder *decoder;
1295 FLAC__ASSERT(0 != chain);
1297 /* we assume we're already at the beginning of the file */
1299 chain->handle = handle;
1300 chain->read_cb = read_cb;
1301 if(0 == (decoder = FLAC__stream_decoder_new())) {
1302 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1305 FLAC__stream_decoder_set_metadata_respond_all(decoder);
1306 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) {
1307 FLAC__stream_decoder_delete(decoder);
1308 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1312 chain->first_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1314 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder))
1315 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1316 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1317 FLAC__stream_decoder_delete(decoder);
1321 FLAC__stream_decoder_delete(decoder);
1323 chain->last_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1325 chain->initial_length = chain_calculate_length_(chain);
1330 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)
1332 FLAC__Metadata_Node *node;
1334 FLAC__ASSERT(0 != chain);
1335 FLAC__ASSERT(0 != chain->head);
1337 if(0 != seek_cb(handle, chain->first_offset, SEEK_SET)) {
1338 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1342 for(node = chain->head; node; node = node->next) {
1343 if(!write_metadata_block_header_cb_(handle, write_cb, node->data)) {
1344 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1347 if(!write_metadata_block_data_cb_(handle, write_cb, node->data)) {
1348 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1353 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1355 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1359 static FLAC__bool chain_rewrite_metadata_in_place_(FLAC__Metadata_Chain *chain)
1364 FLAC__ASSERT(0 != chain->filename);
1366 if(0 == (file = flac_fopen(chain->filename, "r+b"))) {
1367 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1371 /* chain_rewrite_metadata_in_place_cb_() sets chain->status for us */
1372 ret = chain_rewrite_metadata_in_place_cb_(chain, (FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, fseek_wrapper_);
1379 static FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix)
1381 FILE *f, *tempfile = NULL;
1383 FLAC__Metadata_SimpleIteratorStatus status;
1384 const FLAC__Metadata_Node *node;
1386 FLAC__ASSERT(0 != chain);
1387 FLAC__ASSERT(0 != chain->filename);
1388 FLAC__ASSERT(0 != chain->head);
1390 /* copy the file prefix (data up to first metadata block */
1391 if(0 == (f = flac_fopen(chain->filename, "rb"))) {
1392 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1395 if(!open_tempfile_(chain->filename, tempfile_path_prefix, &tempfile, &tempfilename, &status)) {
1396 chain->status = get_equivalent_status_(status);
1399 if(!copy_n_bytes_from_file_(f, tempfile, chain->first_offset, &status)) {
1400 chain->status = get_equivalent_status_(status);
1404 /* write the metadata */
1405 for(node = chain->head; node; node = node->next) {
1406 if(!write_metadata_block_header_(tempfile, &status, node->data)) {
1407 chain->status = get_equivalent_status_(status);
1410 if(!write_metadata_block_data_(tempfile, &status, node->data)) {
1411 chain->status = get_equivalent_status_(status);
1415 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1417 /* copy the file postfix (everything after the metadata) */
1418 if(0 != fseeko(f, chain->last_offset, SEEK_SET)) {
1419 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1422 if(!copy_remaining_bytes_from_file_(f, tempfile, &status)) {
1423 chain->status = get_equivalent_status_(status);
1427 /* move the tempfile on top of the original */
1429 if(!transport_tempfile_(chain->filename, &tempfile, &tempfilename, &status))
1436 cleanup_tempfile_(&tempfile, &tempfilename);
1440 /* assumes 'handle' is already at beginning of file */
1441 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)
1443 FLAC__Metadata_SimpleIteratorStatus status;
1444 const FLAC__Metadata_Node *node;
1446 FLAC__ASSERT(0 != chain);
1447 FLAC__ASSERT(0 == chain->filename);
1448 FLAC__ASSERT(0 != chain->head);
1450 /* copy the file prefix (data up to first metadata block */
1451 if(!copy_n_bytes_from_file_cb_(handle, read_cb, temp_handle, temp_write_cb, chain->first_offset, &status)) {
1452 chain->status = get_equivalent_status_(status);
1456 /* write the metadata */
1457 for(node = chain->head; node; node = node->next) {
1458 if(!write_metadata_block_header_cb_(temp_handle, temp_write_cb, node->data)) {
1459 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1462 if(!write_metadata_block_data_cb_(temp_handle, temp_write_cb, node->data)) {
1463 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1467 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1469 /* copy the file postfix (everything after the metadata) */
1470 if(0 != seek_cb(handle, chain->last_offset, SEEK_SET)) {
1471 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1474 if(!copy_remaining_bytes_from_file_cb_(handle, read_cb, eof_cb, temp_handle, temp_write_cb, &status)) {
1475 chain->status = get_equivalent_status_(status);
1482 FLAC_API FLAC__Metadata_Chain *FLAC__metadata_chain_new(void)
1484 FLAC__Metadata_Chain *chain = calloc(1, sizeof(FLAC__Metadata_Chain));
1492 FLAC_API void FLAC__metadata_chain_delete(FLAC__Metadata_Chain *chain)
1494 FLAC__ASSERT(0 != chain);
1496 chain_clear_(chain);
1501 FLAC_API FLAC__Metadata_ChainStatus FLAC__metadata_chain_status(FLAC__Metadata_Chain *chain)
1503 FLAC__Metadata_ChainStatus status;
1505 FLAC__ASSERT(0 != chain);
1507 status = chain->status;
1508 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1512 static FLAC__bool chain_read_(FLAC__Metadata_Chain *chain, const char *filename, FLAC__bool is_ogg)
1517 FLAC__ASSERT(0 != chain);
1518 FLAC__ASSERT(0 != filename);
1520 chain_clear_(chain);
1522 if(0 == (chain->filename = strdup(filename))) {
1523 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1527 chain->is_ogg = is_ogg;
1529 if(0 == (file = flac_fopen(filename, "rb"))) {
1530 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1534 /* the function also sets chain->status for us */
1536 chain_read_ogg_cb_(chain, file, (FLAC__IOCallback_Read)fread) :
1537 chain_read_cb_(chain, file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, ftell_wrapper_)
1545 FLAC_API FLAC__bool FLAC__metadata_chain_read(FLAC__Metadata_Chain *chain, const char *filename)
1547 return chain_read_(chain, filename, /*is_ogg=*/false);
1550 /*@@@@add to tests*/
1551 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg(FLAC__Metadata_Chain *chain, const char *filename)
1553 return chain_read_(chain, filename, /*is_ogg=*/true);
1556 static FLAC__bool chain_read_with_callbacks_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks, FLAC__bool is_ogg)
1560 FLAC__ASSERT(0 != chain);
1562 chain_clear_(chain);
1564 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.tell) {
1565 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1569 chain->is_ogg = is_ogg;
1572 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1573 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1577 /* the function also sets chain->status for us */
1579 chain_read_ogg_cb_(chain, handle, callbacks.read) :
1580 chain_read_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.tell)
1586 FLAC_API FLAC__bool FLAC__metadata_chain_read_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1588 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/false);
1591 /*@@@@add to tests*/
1592 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1594 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/true);
1597 FLAC_API FLAC__bool FLAC__metadata_chain_check_if_tempfile_needed(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1599 /* This does all the same checks that are in chain_prepare_for_write_()
1600 * but doesn't actually alter the chain. Make sure to update the logic
1601 * here if chain_prepare_for_write_() changes.
1603 const FLAC__off_t current_length = chain_calculate_length_(chain);
1605 FLAC__ASSERT(0 != chain);
1608 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1609 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING)
1611 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1612 else if(current_length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length)
1614 /* 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 */
1615 else if(current_length > chain->initial_length) {
1616 const FLAC__off_t delta = current_length - chain->initial_length;
1617 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1618 /* if the delta is exactly the size of the last padding block, remove the padding block */
1619 if((FLAC__off_t)chain->tail->data->length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta)
1621 /* if there is at least 'delta' bytes of padding, trim the padding down */
1622 else if((FLAC__off_t)chain->tail->data->length >= delta)
1628 return (current_length != chain->initial_length);
1631 FLAC_API FLAC__bool FLAC__metadata_chain_write(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats)
1633 struct flac_stat_s stats;
1634 const char *tempfile_path_prefix = 0;
1635 FLAC__off_t current_length;
1637 FLAC__ASSERT(0 != chain);
1639 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1640 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1644 if (0 == chain->filename) {
1645 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1649 current_length = chain_prepare_for_write_(chain, use_padding);
1651 /* a return value of 0 means there was an error; chain->status is already set */
1652 if (0 == current_length)
1655 if(preserve_file_stats)
1656 get_file_stats_(chain->filename, &stats);
1658 if(current_length == chain->initial_length) {
1659 if(!chain_rewrite_metadata_in_place_(chain))
1663 if(!chain_rewrite_file_(chain, tempfile_path_prefix))
1666 /* recompute lengths and offsets */
1668 const FLAC__Metadata_Node *node;
1669 chain->initial_length = current_length;
1670 chain->last_offset = chain->first_offset;
1671 for(node = chain->head; node; node = node->next)
1672 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1676 if(preserve_file_stats)
1677 set_file_stats_(chain->filename, &stats);
1682 FLAC_API FLAC__bool FLAC__metadata_chain_write_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1684 FLAC__off_t current_length;
1686 FLAC__ASSERT(0 != chain);
1688 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1689 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1693 if (0 != chain->filename) {
1694 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1698 if (0 == callbacks.write || 0 == callbacks.seek) {
1699 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1703 if (FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1704 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1708 current_length = chain_prepare_for_write_(chain, use_padding);
1710 /* a return value of 0 means there was an error; chain->status is already set */
1711 if (0 == current_length)
1714 FLAC__ASSERT(current_length == chain->initial_length);
1716 return chain_rewrite_metadata_in_place_cb_(chain, handle, callbacks.write, callbacks.seek);
1719 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)
1721 FLAC__off_t current_length;
1723 FLAC__ASSERT(0 != chain);
1725 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1726 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1730 if (0 != chain->filename) {
1731 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1735 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.eof) {
1736 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1739 if (0 == temp_callbacks.write) {
1740 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1744 if (!FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1745 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1749 current_length = chain_prepare_for_write_(chain, use_padding);
1751 /* a return value of 0 means there was an error; chain->status is already set */
1752 if (0 == current_length)
1755 FLAC__ASSERT(current_length != chain->initial_length);
1758 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1759 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1763 if(!chain_rewrite_file_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.eof, temp_handle, temp_callbacks.write))
1766 /* recompute lengths and offsets */
1768 const FLAC__Metadata_Node *node;
1769 chain->initial_length = current_length;
1770 chain->last_offset = chain->first_offset;
1771 for(node = chain->head; node; node = node->next)
1772 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1778 FLAC_API void FLAC__metadata_chain_merge_padding(FLAC__Metadata_Chain *chain)
1780 FLAC__Metadata_Node *node;
1782 FLAC__ASSERT(0 != chain);
1784 for(node = chain->head; node; ) {
1785 if(!chain_merge_adjacent_padding_(chain, node))
1790 FLAC_API void FLAC__metadata_chain_sort_padding(FLAC__Metadata_Chain *chain)
1792 FLAC__Metadata_Node *node, *save;
1795 FLAC__ASSERT(0 != chain);
1798 * Don't try and be too smart... this simple algo is good enough for
1799 * the small number of nodes that we deal with.
1801 for(i = 0, node = chain->head; i < chain->nodes; i++) {
1802 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1804 chain_remove_node_(chain, node);
1805 chain_append_node_(chain, node);
1813 FLAC__metadata_chain_merge_padding(chain);
1817 FLAC_API FLAC__Metadata_Iterator *FLAC__metadata_iterator_new(void)
1819 FLAC__Metadata_Iterator *iterator = calloc(1, sizeof(FLAC__Metadata_Iterator));
1821 /* calloc() implies:
1822 iterator->current = 0;
1823 iterator->chain = 0;
1829 FLAC_API void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator)
1831 FLAC__ASSERT(0 != iterator);
1836 FLAC_API void FLAC__metadata_iterator_init(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Chain *chain)
1838 FLAC__ASSERT(0 != iterator);
1839 FLAC__ASSERT(0 != chain);
1840 FLAC__ASSERT(0 != chain->head);
1842 iterator->chain = chain;
1843 iterator->current = chain->head;
1846 FLAC_API FLAC__bool FLAC__metadata_iterator_next(FLAC__Metadata_Iterator *iterator)
1848 FLAC__ASSERT(0 != iterator);
1850 if(0 == iterator->current || 0 == iterator->current->next)
1853 iterator->current = iterator->current->next;
1857 FLAC_API FLAC__bool FLAC__metadata_iterator_prev(FLAC__Metadata_Iterator *iterator)
1859 FLAC__ASSERT(0 != iterator);
1861 if(0 == iterator->current || 0 == iterator->current->prev)
1864 iterator->current = iterator->current->prev;
1868 FLAC_API FLAC__MetadataType FLAC__metadata_iterator_get_block_type(const FLAC__Metadata_Iterator *iterator)
1870 FLAC__ASSERT(0 != iterator);
1871 FLAC__ASSERT(0 != iterator->current);
1872 FLAC__ASSERT(0 != iterator->current->data);
1874 return iterator->current->data->type;
1877 FLAC_API FLAC__StreamMetadata *FLAC__metadata_iterator_get_block(FLAC__Metadata_Iterator *iterator)
1879 FLAC__ASSERT(0 != iterator);
1880 FLAC__ASSERT(0 != iterator->current);
1882 return iterator->current->data;
1885 FLAC_API FLAC__bool FLAC__metadata_iterator_set_block(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1887 FLAC__ASSERT(0 != iterator);
1888 FLAC__ASSERT(0 != block);
1889 return FLAC__metadata_iterator_delete_block(iterator, false) && FLAC__metadata_iterator_insert_block_after(iterator, block);
1892 FLAC_API FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__Metadata_Iterator *iterator, FLAC__bool replace_with_padding)
1894 FLAC__Metadata_Node *save;
1896 FLAC__ASSERT(0 != iterator);
1897 FLAC__ASSERT(0 != iterator->current);
1899 if(0 == iterator->current->prev) {
1900 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1904 save = iterator->current->prev;
1906 if(replace_with_padding) {
1907 FLAC__metadata_object_delete_data(iterator->current->data);
1908 iterator->current->data->type = FLAC__METADATA_TYPE_PADDING;
1911 chain_delete_node_(iterator->chain, iterator->current);
1914 iterator->current = save;
1918 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1920 FLAC__Metadata_Node *node;
1922 FLAC__ASSERT(0 != iterator);
1923 FLAC__ASSERT(0 != iterator->current);
1924 FLAC__ASSERT(0 != block);
1926 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1929 if(0 == iterator->current->prev) {
1930 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1934 if(0 == (node = node_new_()))
1938 iterator_insert_node_(iterator, node);
1939 iterator->current = node;
1943 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1945 FLAC__Metadata_Node *node;
1947 FLAC__ASSERT(0 != iterator);
1948 FLAC__ASSERT(0 != iterator->current);
1949 FLAC__ASSERT(0 != block);
1951 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1954 if(0 == (node = node_new_()))
1958 iterator_insert_node_after_(iterator, node);
1959 iterator->current = node;
1964 /****************************************************************************
1966 * Local function definitions
1968 ***************************************************************************/
1970 void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1976 for(i = 0; i < bytes; i++) {
1977 *(--b) = (FLAC__byte)(val & 0xff);
1982 void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1986 for(i = 0; i < bytes; i++) {
1987 *(b++) = (FLAC__byte)(val & 0xff);
1992 void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes)
1998 for(i = 0; i < bytes; i++) {
1999 *(--b) = (FLAC__byte)(val & 0xff);
2004 FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes)
2006 FLAC__uint32 ret = 0;
2009 for(i = 0; i < bytes; i++)
2010 ret = (ret << 8) | (FLAC__uint32)(*b++);
2015 FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes)
2017 FLAC__uint32 ret = 0;
2022 for(i = 0; i < bytes; i++)
2023 ret = (ret << 8) | (FLAC__uint32)(*--b);
2028 FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes)
2030 FLAC__uint64 ret = 0;
2033 for(i = 0; i < bytes; i++)
2034 ret = (ret << 8) | (FLAC__uint64)(*b++);
2039 FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator)
2041 FLAC__ASSERT(0 != iterator);
2042 FLAC__ASSERT(0 != iterator->file);
2044 if(!read_metadata_block_header_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, &iterator->is_last, &iterator->type, &iterator->length)) {
2045 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2052 FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block)
2054 FLAC__ASSERT(0 != iterator);
2055 FLAC__ASSERT(0 != iterator->file);
2057 iterator->status = read_metadata_block_data_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, block);
2059 return (iterator->status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK);
2062 FLAC__bool read_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__bool *is_last, FLAC__MetadataType *type, unsigned *length)
2064 FLAC__byte raw_header[FLAC__STREAM_METADATA_HEADER_LENGTH];
2066 if(read_cb(raw_header, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2069 *is_last = raw_header[0] & 0x80? true : false;
2070 *type = (FLAC__MetadataType)(raw_header[0] & 0x7f);
2071 *length = unpack_uint32_(raw_header + 1, 3);
2073 /* Note that we don't check:
2074 * if(iterator->type >= FLAC__METADATA_TYPE_UNDEFINED)
2075 * we just will read in an opaque block
2081 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata *block)
2083 switch(block->type) {
2084 case FLAC__METADATA_TYPE_STREAMINFO:
2085 return read_metadata_block_data_streaminfo_cb_(handle, read_cb, &block->data.stream_info);
2086 case FLAC__METADATA_TYPE_PADDING:
2087 return read_metadata_block_data_padding_cb_(handle, seek_cb, &block->data.padding, block->length);
2088 case FLAC__METADATA_TYPE_APPLICATION:
2089 return read_metadata_block_data_application_cb_(handle, read_cb, &block->data.application, block->length);
2090 case FLAC__METADATA_TYPE_SEEKTABLE:
2091 return read_metadata_block_data_seektable_cb_(handle, read_cb, &block->data.seek_table, block->length);
2092 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2093 return read_metadata_block_data_vorbis_comment_cb_(handle, read_cb, &block->data.vorbis_comment);
2094 case FLAC__METADATA_TYPE_CUESHEET:
2095 return read_metadata_block_data_cuesheet_cb_(handle, read_cb, &block->data.cue_sheet);
2096 case FLAC__METADATA_TYPE_PICTURE:
2097 return read_metadata_block_data_picture_cb_(handle, read_cb, &block->data.picture);
2099 return read_metadata_block_data_unknown_cb_(handle, read_cb, &block->data.unknown, block->length);
2103 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block)
2105 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH], *b;
2107 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2108 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2112 /* we are using hardcoded numbers for simplicity but we should
2113 * probably eventually write a bit-level unpacker and use the
2114 * _STREAMINFO_ constants.
2116 block->min_blocksize = unpack_uint32_(b, 2); b += 2;
2117 block->max_blocksize = unpack_uint32_(b, 2); b += 2;
2118 block->min_framesize = unpack_uint32_(b, 3); b += 3;
2119 block->max_framesize = unpack_uint32_(b, 3); b += 3;
2120 block->sample_rate = (unpack_uint32_(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4);
2121 block->channels = (unsigned)((b[2] & 0x0e) >> 1) + 1;
2122 block->bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 4) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1;
2123 block->total_samples = (((FLAC__uint64)(b[3] & 0x0f)) << 32) | unpack_uint64_(b+4, 4);
2124 memcpy(block->md5sum, b+8, 16);
2126 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2129 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_Padding *block, unsigned block_length)
2131 (void)block; /* nothing to do; we don't care about reading the padding bytes */
2133 if(0 != seek_cb(handle, block_length, SEEK_CUR))
2134 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2136 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2139 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Application *block, unsigned block_length)
2141 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2143 if(read_cb(block->id, 1, id_bytes, handle) != id_bytes)
2144 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2146 if(block_length < id_bytes)
2147 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2149 block_length -= id_bytes;
2151 if(block_length == 0) {
2155 if(0 == (block->data = malloc(block_length)))
2156 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2158 if(read_cb(block->data, 1, block_length, handle) != block_length)
2159 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2162 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2165 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_SeekTable *block, unsigned block_length)
2168 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2170 FLAC__ASSERT(block_length % FLAC__STREAM_METADATA_SEEKPOINT_LENGTH == 0);
2172 block->num_points = block_length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
2174 if(block->num_points == 0)
2176 else if(0 == (block->points = safe_malloc_mul_2op_p(block->num_points, /*times*/sizeof(FLAC__StreamMetadata_SeekPoint))))
2177 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2179 for(i = 0; i < block->num_points; i++) {
2180 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2181 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2182 /* some MAGIC NUMBERs here */
2183 block->points[i].sample_number = unpack_uint64_(buffer, 8);
2184 block->points[i].stream_offset = unpack_uint64_(buffer+8, 8);
2185 block->points[i].frame_samples = unpack_uint32_(buffer+16, 2);
2188 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2191 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment_Entry *entry)
2193 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2194 FLAC__byte buffer[4]; /* magic number is asserted below */
2196 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8 == sizeof(buffer));
2198 if(read_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2199 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2200 entry->length = unpack_uint32_little_endian_(buffer, entry_length_len);
2202 if(0 != entry->entry)
2205 if(entry->length == 0) {
2209 if(0 == (entry->entry = safe_malloc_add_2op_(entry->length, /*+*/1)))
2210 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2212 if(read_cb(entry->entry, 1, entry->length, handle) != entry->length)
2213 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2215 entry->entry[entry->length] = '\0';
2218 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2221 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment *block)
2224 FLAC__Metadata_SimpleIteratorStatus status;
2225 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2226 FLAC__byte buffer[4]; /* magic number is asserted below */
2228 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8 == sizeof(buffer));
2230 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, &(block->vendor_string))))
2233 if(read_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2234 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2235 block->num_comments = unpack_uint32_little_endian_(buffer, num_comments_len);
2237 if(block->num_comments == 0) {
2238 block->comments = 0;
2240 else if(0 == (block->comments = calloc(block->num_comments, sizeof(FLAC__StreamMetadata_VorbisComment_Entry))))
2241 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2243 for(i = 0; i < block->num_comments; i++) {
2244 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, block->comments + i)))
2248 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2251 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track)
2254 FLAC__byte buffer[32]; /* asserted below that this is big enough */
2256 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2257 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2258 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);
2260 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2261 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2262 if(read_cb(buffer, 1, len, handle) != len)
2263 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2264 track->offset = unpack_uint64_(buffer, len);
2266 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2267 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2268 if(read_cb(buffer, 1, len, handle) != len)
2269 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2270 track->number = (FLAC__byte)unpack_uint32_(buffer, len);
2272 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2273 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2274 if(read_cb(track->isrc, 1, len, handle) != len)
2275 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2277 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);
2278 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2279 if(read_cb(buffer, 1, len, handle) != len)
2280 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2281 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN == 1);
2282 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN == 1);
2283 track->type = buffer[0] >> 7;
2284 track->pre_emphasis = (buffer[0] >> 6) & 1;
2286 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2287 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2288 if(read_cb(buffer, 1, len, handle) != len)
2289 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2290 track->num_indices = (FLAC__byte)unpack_uint32_(buffer, len);
2292 if(track->num_indices == 0) {
2295 else if(0 == (track->indices = calloc(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index))))
2296 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2298 for(i = 0; i < track->num_indices; i++) {
2299 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2300 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2301 if(read_cb(buffer, 1, len, handle) != len)
2302 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2303 track->indices[i].offset = unpack_uint64_(buffer, len);
2305 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2306 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2307 if(read_cb(buffer, 1, len, handle) != len)
2308 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2309 track->indices[i].number = (FLAC__byte)unpack_uint32_(buffer, len);
2311 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2312 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2313 if(read_cb(buffer, 1, len, handle) != len)
2314 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2317 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2320 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block)
2323 FLAC__Metadata_SimpleIteratorStatus status;
2324 FLAC__byte buffer[1024]; /* MSVC needs a constant expression so we put a magic number and assert */
2326 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN)/8 <= sizeof(buffer));
2327 FLAC__ASSERT(sizeof(FLAC__uint64) <= sizeof(buffer));
2329 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2330 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2331 if(read_cb(block->media_catalog_number, 1, len, handle) != len)
2332 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2334 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2335 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2336 if(read_cb(buffer, 1, len, handle) != len)
2337 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2338 block->lead_in = unpack_uint64_(buffer, len);
2340 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2341 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2342 if(read_cb(buffer, 1, len, handle) != len)
2343 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2344 block->is_cd = buffer[0]&0x80? true : false;
2346 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2347 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2348 if(read_cb(buffer, 1, len, handle) != len)
2349 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2350 block->num_tracks = unpack_uint32_(buffer, len);
2352 if(block->num_tracks == 0) {
2355 else if(0 == (block->tracks = calloc(block->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track))))
2356 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2358 for(i = 0; i < block->num_tracks; i++) {
2359 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_cuesheet_track_cb_(handle, read_cb, block->tracks + i)))
2363 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2366 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)
2368 FLAC__byte buffer[sizeof(FLAC__uint32)];
2370 FLAC__ASSERT(0 != data);
2371 FLAC__ASSERT(length_len%8 == 0);
2373 length_len /= 8; /* convert to bytes */
2375 FLAC__ASSERT(sizeof(buffer) >= length_len);
2377 if(read_cb(buffer, 1, length_len, handle) != length_len)
2378 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2379 *length = unpack_uint32_(buffer, length_len);
2384 if(0 == (*data = safe_malloc_add_2op_(*length, /*+*/1)))
2385 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2388 if(read_cb(*data, 1, *length, handle) != *length)
2389 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2392 (*data)[*length] = '\0';
2394 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2397 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block)
2399 FLAC__Metadata_SimpleIteratorStatus status;
2400 FLAC__byte buffer[4]; /* asserted below that this is big enough */
2403 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2404 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2405 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2406 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2407 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2409 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_TYPE_LEN % 8 == 0);
2410 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN / 8;
2411 if(read_cb(buffer, 1, len, handle) != len)
2412 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2413 block->type = (FLAC__StreamMetadata_Picture_Type)unpack_uint32_(buffer, len);
2415 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)
2418 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)
2421 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN % 8 == 0);
2422 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN / 8;
2423 if(read_cb(buffer, 1, len, handle) != len)
2424 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2425 block->width = unpack_uint32_(buffer, len);
2427 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN % 8 == 0);
2428 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN / 8;
2429 if(read_cb(buffer, 1, len, handle) != len)
2430 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2431 block->height = unpack_uint32_(buffer, len);
2433 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN % 8 == 0);
2434 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN / 8;
2435 if(read_cb(buffer, 1, len, handle) != len)
2436 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2437 block->depth = unpack_uint32_(buffer, len);
2439 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_COLORS_LEN % 8 == 0);
2440 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN / 8;
2441 if(read_cb(buffer, 1, len, handle) != len)
2442 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2443 block->colors = unpack_uint32_(buffer, len);
2445 /* for convenience we use read_metadata_block_data_picture_cstring_cb_() even though it adds an extra terminating NUL we don't use */
2446 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)
2449 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2452 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2454 if(block_length == 0) {
2458 if(0 == (block->data = malloc(block_length)))
2459 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2461 if(read_cb(block->data, 1, block_length, handle) != block_length)
2462 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2465 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2468 FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2470 FLAC__ASSERT(0 != file);
2471 FLAC__ASSERT(0 != status);
2473 if(!write_metadata_block_header_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2474 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2481 FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2483 FLAC__ASSERT(0 != file);
2484 FLAC__ASSERT(0 != status);
2486 if (write_metadata_block_data_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2487 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2491 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2496 FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2498 FLAC__byte buffer[FLAC__STREAM_METADATA_HEADER_LENGTH];
2500 FLAC__ASSERT(block->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
2502 buffer[0] = (block->is_last? 0x80 : 0) | (FLAC__byte)block->type;
2503 pack_uint32_(block->length, buffer + 1, 3);
2505 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2511 FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2513 FLAC__ASSERT(0 != block);
2515 switch(block->type) {
2516 case FLAC__METADATA_TYPE_STREAMINFO:
2517 return write_metadata_block_data_streaminfo_cb_(handle, write_cb, &block->data.stream_info);
2518 case FLAC__METADATA_TYPE_PADDING:
2519 return write_metadata_block_data_padding_cb_(handle, write_cb, &block->data.padding, block->length);
2520 case FLAC__METADATA_TYPE_APPLICATION:
2521 return write_metadata_block_data_application_cb_(handle, write_cb, &block->data.application, block->length);
2522 case FLAC__METADATA_TYPE_SEEKTABLE:
2523 return write_metadata_block_data_seektable_cb_(handle, write_cb, &block->data.seek_table);
2524 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2525 return write_metadata_block_data_vorbis_comment_cb_(handle, write_cb, &block->data.vorbis_comment);
2526 case FLAC__METADATA_TYPE_CUESHEET:
2527 return write_metadata_block_data_cuesheet_cb_(handle, write_cb, &block->data.cue_sheet);
2528 case FLAC__METADATA_TYPE_PICTURE:
2529 return write_metadata_block_data_picture_cb_(handle, write_cb, &block->data.picture);
2531 return write_metadata_block_data_unknown_cb_(handle, write_cb, &block->data.unknown, block->length);
2535 FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block)
2537 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH];
2538 const unsigned channels1 = block->channels - 1;
2539 const unsigned bps1 = block->bits_per_sample - 1;
2541 /* we are using hardcoded numbers for simplicity but we should
2542 * probably eventually write a bit-level packer and use the
2543 * _STREAMINFO_ constants.
2545 pack_uint32_(block->min_blocksize, buffer, 2);
2546 pack_uint32_(block->max_blocksize, buffer+2, 2);
2547 pack_uint32_(block->min_framesize, buffer+4, 3);
2548 pack_uint32_(block->max_framesize, buffer+7, 3);
2549 buffer[10] = (block->sample_rate >> 12) & 0xff;
2550 buffer[11] = (block->sample_rate >> 4) & 0xff;
2551 buffer[12] = ((block->sample_rate & 0x0f) << 4) | (channels1 << 1) | (bps1 >> 4);
2552 buffer[13] = (FLAC__byte)(((bps1 & 0x0f) << 4) | ((block->total_samples >> 32) & 0x0f));
2553 pack_uint32_((FLAC__uint32)block->total_samples, buffer+14, 4);
2554 memcpy(buffer+18, block->md5sum, 16);
2556 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2562 FLAC__bool write_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Padding *block, unsigned block_length)
2564 unsigned i, n = block_length;
2565 FLAC__byte buffer[1024];
2569 memset(buffer, 0, 1024);
2571 for(i = 0; i < n/1024; i++)
2572 if(write_cb(buffer, 1, 1024, handle) != 1024)
2577 if(write_cb(buffer, 1, n, handle) != n)
2583 FLAC__bool write_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Application *block, unsigned block_length)
2585 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2587 if(write_cb(block->id, 1, id_bytes, handle) != id_bytes)
2590 block_length -= id_bytes;
2592 if(write_cb(block->data, 1, block_length, handle) != block_length)
2598 FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block)
2601 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2603 for(i = 0; i < block->num_points; i++) {
2604 /* some MAGIC NUMBERs here */
2605 pack_uint64_(block->points[i].sample_number, buffer, 8);
2606 pack_uint64_(block->points[i].stream_offset, buffer+8, 8);
2607 pack_uint32_(block->points[i].frame_samples, buffer+16, 2);
2608 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2615 FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block)
2618 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2619 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2620 FLAC__byte buffer[4]; /* magic number is asserted below */
2622 FLAC__ASSERT(flac_max(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN, FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8 == sizeof(buffer));
2624 pack_uint32_little_endian_(block->vendor_string.length, buffer, entry_length_len);
2625 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2627 if(write_cb(block->vendor_string.entry, 1, block->vendor_string.length, handle) != block->vendor_string.length)
2630 pack_uint32_little_endian_(block->num_comments, buffer, num_comments_len);
2631 if(write_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2634 for(i = 0; i < block->num_comments; i++) {
2635 pack_uint32_little_endian_(block->comments[i].length, buffer, entry_length_len);
2636 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2638 if(write_cb(block->comments[i].entry, 1, block->comments[i].length, handle) != block->comments[i].length)
2645 FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block)
2648 FLAC__byte buffer[1024]; /* asserted below that this is big enough */
2650 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2651 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN/8);
2652 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);
2653 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2655 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2656 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2657 if(write_cb(block->media_catalog_number, 1, len, handle) != len)
2660 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2661 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2662 pack_uint64_(block->lead_in, buffer, len);
2663 if(write_cb(buffer, 1, len, handle) != len)
2666 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2667 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2668 memset(buffer, 0, len);
2671 if(write_cb(buffer, 1, len, handle) != len)
2674 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2675 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2676 pack_uint32_(block->num_tracks, buffer, len);
2677 if(write_cb(buffer, 1, len, handle) != len)
2680 for(i = 0; i < block->num_tracks; i++) {
2681 FLAC__StreamMetadata_CueSheet_Track *track = block->tracks + i;
2683 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2684 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2685 pack_uint64_(track->offset, buffer, len);
2686 if(write_cb(buffer, 1, len, handle) != len)
2689 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2690 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2691 pack_uint32_(track->number, buffer, len);
2692 if(write_cb(buffer, 1, len, handle) != len)
2695 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2696 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2697 if(write_cb(track->isrc, 1, len, handle) != len)
2700 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);
2701 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2702 memset(buffer, 0, len);
2703 buffer[0] = (track->type << 7) | (track->pre_emphasis << 6);
2704 if(write_cb(buffer, 1, len, handle) != len)
2707 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2708 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2709 pack_uint32_(track->num_indices, buffer, len);
2710 if(write_cb(buffer, 1, len, handle) != len)
2713 for(j = 0; j < track->num_indices; j++) {
2714 FLAC__StreamMetadata_CueSheet_Index *index = track->indices + j;
2716 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2717 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2718 pack_uint64_(index->offset, buffer, len);
2719 if(write_cb(buffer, 1, len, handle) != len)
2722 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2723 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2724 pack_uint32_(index->number, buffer, len);
2725 if(write_cb(buffer, 1, len, handle) != len)
2728 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2729 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2730 memset(buffer, 0, len);
2731 if(write_cb(buffer, 1, len, handle) != len)
2739 FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block)
2743 FLAC__byte buffer[4]; /* magic number is asserted below */
2745 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_TYPE_LEN%8);
2746 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN%8);
2747 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN%8);
2748 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN%8);
2749 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN%8);
2750 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN%8);
2751 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_COLORS_LEN%8);
2752 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN%8);
2753 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2754 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8);
2755 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8);
2756 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2757 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2758 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2759 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2760 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8);
2762 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8;
2763 pack_uint32_(block->type, buffer, len);
2764 if(write_cb(buffer, 1, len, handle) != len)
2767 len = FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8;
2768 slen = strlen(block->mime_type);
2769 pack_uint32_(slen, buffer, len);
2770 if(write_cb(buffer, 1, len, handle) != len)
2772 if(write_cb(block->mime_type, 1, slen, handle) != slen)
2775 len = FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8;
2776 slen = strlen((const char *)block->description);
2777 pack_uint32_(slen, buffer, len);
2778 if(write_cb(buffer, 1, len, handle) != len)
2780 if(write_cb(block->description, 1, slen, handle) != slen)
2783 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8;
2784 pack_uint32_(block->width, buffer, len);
2785 if(write_cb(buffer, 1, len, handle) != len)
2788 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8;
2789 pack_uint32_(block->height, buffer, len);
2790 if(write_cb(buffer, 1, len, handle) != len)
2793 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8;
2794 pack_uint32_(block->depth, buffer, len);
2795 if(write_cb(buffer, 1, len, handle) != len)
2798 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8;
2799 pack_uint32_(block->colors, buffer, len);
2800 if(write_cb(buffer, 1, len, handle) != len)
2803 len = FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8;
2804 pack_uint32_(block->data_length, buffer, len);
2805 if(write_cb(buffer, 1, len, handle) != len)
2807 if(write_cb(block->data, 1, block->data_length, handle) != block->data_length)
2813 FLAC__bool write_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2815 if(write_cb(block->data, 1, block_length, handle) != block_length)
2821 FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block)
2823 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2824 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2828 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2831 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2834 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2835 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2839 return read_metadata_block_header_(iterator);
2842 FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last)
2844 FLAC__StreamMetadata *padding;
2846 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2847 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2851 block->is_last = false;
2853 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2856 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2859 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
2860 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2862 padding->is_last = padding_is_last;
2863 padding->length = padding_length;
2865 if(!write_metadata_block_header_(iterator->file, &iterator->status, padding)) {
2866 FLAC__metadata_object_delete(padding);
2870 if(!write_metadata_block_data_(iterator->file, &iterator->status, padding)) {
2871 FLAC__metadata_object_delete(padding);
2875 FLAC__metadata_object_delete(padding);
2877 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2878 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2882 return read_metadata_block_header_(iterator);
2885 FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append)
2887 FILE *tempfile = NULL;
2888 char *tempfilename = NULL;
2889 int fixup_is_last_code = 0; /* 0 => no need to change any is_last flags */
2890 FLAC__off_t fixup_is_last_flag_offset = -1;
2892 FLAC__ASSERT(0 != block || append == false);
2894 if(iterator->is_last) {
2896 fixup_is_last_code = 1; /* 1 => clear the is_last flag at the following offset */
2897 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2899 else if(0 == block) {
2900 simple_iterator_push_(iterator);
2901 if(!FLAC__metadata_simple_iterator_prev(iterator)) {
2902 (void)simple_iterator_pop_(iterator);
2905 fixup_is_last_code = -1; /* -1 => set the is_last the flag at the following offset */
2906 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2907 if(!simple_iterator_pop_(iterator))
2912 if(!simple_iterator_copy_file_prefix_(iterator, &tempfile, &tempfilename, append))
2916 if(!write_metadata_block_header_(tempfile, &iterator->status, block)) {
2917 cleanup_tempfile_(&tempfile, &tempfilename);
2921 if(!write_metadata_block_data_(tempfile, &iterator->status, block)) {
2922 cleanup_tempfile_(&tempfile, &tempfilename);
2927 if(!simple_iterator_copy_file_postfix_(iterator, &tempfile, &tempfilename, fixup_is_last_code, fixup_is_last_flag_offset, block==0))
2931 return FLAC__metadata_simple_iterator_next(iterator);
2936 void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator)
2938 FLAC__ASSERT(iterator->depth+1 < SIMPLE_ITERATOR_MAX_PUSH_DEPTH);
2939 iterator->offset[iterator->depth+1] = iterator->offset[iterator->depth];
2943 FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator)
2945 FLAC__ASSERT(iterator->depth > 0);
2947 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2948 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2952 return read_metadata_block_header_(iterator);
2959 * 3: not a FLAC file
2961 unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb)
2963 FLAC__byte buffer[4];
2967 FLAC__ASSERT(FLAC__STREAM_SYNC_LENGTH == sizeof(buffer));
2969 /* skip any id3v2 tag */
2971 n = read_cb(buffer, 1, 4, handle);
2976 else if(0 == memcmp(buffer, "ID3", 3)) {
2977 unsigned tag_length = 0;
2979 /* skip to the tag length */
2980 if(seek_cb(handle, 2, SEEK_CUR) < 0)
2983 /* read the length */
2984 for(i = 0; i < 4; i++) {
2985 if(read_cb(buffer, 1, 1, handle) < 1 || buffer[0] & 0x80)
2988 tag_length |= (buffer[0] & 0x7f);
2991 /* skip the rest of the tag */
2992 if(seek_cb(handle, tag_length, SEEK_CUR) < 0)
2995 /* read the stream sync code */
2997 n = read_cb(buffer, 1, 4, handle);
3004 /* check for the fLaC signature */
3005 if(0 == memcmp(FLAC__STREAM_SYNC_STRING, buffer, FLAC__STREAM_SYNC_LENGTH))
3011 unsigned seek_to_first_metadata_block_(FILE *f)
3013 return seek_to_first_metadata_block_cb_((FLAC__IOHandle)f, (FLAC__IOCallback_Read)fread, fseek_wrapper_);
3016 FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append)
3018 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];
3020 if(0 != fseeko(iterator->file, 0, SEEK_SET)) {
3021 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3024 if(!open_tempfile_(iterator->filename, iterator->tempfile_path_prefix, tempfile, tempfilename, &iterator->status)) {
3025 cleanup_tempfile_(tempfile, tempfilename);
3028 if(!copy_n_bytes_from_file_(iterator->file, *tempfile, offset_end, &iterator->status)) {
3029 cleanup_tempfile_(tempfile, tempfilename);
3036 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)
3038 FLAC__off_t save_offset = iterator->offset[iterator->depth];
3039 FLAC__ASSERT(0 != *tempfile);
3041 if(0 != fseeko(iterator->file, save_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length, SEEK_SET)) {
3042 cleanup_tempfile_(tempfile, tempfilename);
3043 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3046 if(!copy_remaining_bytes_from_file_(iterator->file, *tempfile, &iterator->status)) {
3047 cleanup_tempfile_(tempfile, tempfilename);
3051 if(fixup_is_last_code != 0) {
3053 * if code == 1, it means a block was appended to the end so
3054 * we have to clear the is_last flag of the previous block
3055 * if code == -1, it means the last block was deleted so
3056 * we have to set the is_last flag of the previous block
3058 /* MAGIC NUMBERs here; we know the is_last flag is the high bit of the byte at this location */
3060 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3061 cleanup_tempfile_(tempfile, tempfilename);
3062 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3065 if(fread(&x, 1, 1, *tempfile) != 1) {
3066 cleanup_tempfile_(tempfile, tempfilename);
3067 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3070 if(fixup_is_last_code > 0) {
3071 FLAC__ASSERT(x & 0x80);
3075 FLAC__ASSERT(!(x & 0x80));
3078 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3079 cleanup_tempfile_(tempfile, tempfilename);
3080 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3083 if(local__fwrite(&x, 1, 1, *tempfile) != 1) {
3084 cleanup_tempfile_(tempfile, tempfilename);
3085 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3090 (void)fclose(iterator->file);
3092 if(!transport_tempfile_(iterator->filename, tempfile, tempfilename, &iterator->status))
3095 if(iterator->has_stats)
3096 set_file_stats_(iterator->filename, &iterator->stats);
3098 if(!simple_iterator_prime_input_(iterator, !iterator->is_writable))
3101 while(iterator->offset[iterator->depth] + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length < save_offset)
3102 if(!FLAC__metadata_simple_iterator_next(iterator))
3107 /* move the iterator to it's original block faster by faking a push, then doing a pop_ */
3108 FLAC__ASSERT(iterator->depth == 0);
3109 iterator->offset[0] = save_offset;
3111 return simple_iterator_pop_(iterator);
3115 FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status)
3117 FLAC__byte buffer[8192];
3120 FLAC__ASSERT(bytes >= 0);
3122 n = flac_min(sizeof(buffer), (size_t)bytes);
3123 if(fread(buffer, 1, n, file) != n) {
3124 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3127 if(local__fwrite(buffer, 1, n, tempfile) != n) {
3128 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3137 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)
3139 FLAC__byte buffer[8192];
3142 FLAC__ASSERT(bytes >= 0);
3144 n = flac_min(sizeof(buffer), (size_t)bytes);
3145 if(read_cb(buffer, 1, n, handle) != n) {
3146 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3149 if(temp_write_cb(buffer, 1, n, temp_handle) != n) {
3150 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3159 FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status)
3161 FLAC__byte buffer[8192];
3164 while(!feof(file)) {
3165 n = fread(buffer, 1, sizeof(buffer), file);
3166 if(n == 0 && !feof(file)) {
3167 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3170 if(n > 0 && local__fwrite(buffer, 1, n, tempfile) != n) {
3171 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3179 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)
3181 FLAC__byte buffer[8192];
3184 while(!eof_cb(handle)) {
3185 n = read_cb(buffer, 1, sizeof(buffer), handle);
3186 if(n == 0 && !eof_cb(handle)) {
3187 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3190 if(n > 0 && temp_write_cb(buffer, 1, n, temp_handle) != n) {
3191 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3200 local_snprintf(char *str, size_t size, const char *fmt, ...)
3208 rc = vsnprintf_s (str, size, _TRUNCATE, fmt, va);
3209 rc = (rc > 0) ? rc : (size == 0 ? 1024 : size * 2);
3211 rc = vsnprintf (str, size, fmt, va);
3218 FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3220 static const char *tempfile_suffix = ".metadata_edit";
3221 if(0 == tempfile_path_prefix) {
3222 size_t dest_len = strlen(filename) + strlen(tempfile_suffix) + 1;
3223 if(0 == (*tempfilename = safe_malloc_(dest_len))) {
3224 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3227 local_snprintf(*tempfilename, dest_len, "%s%s", filename, tempfile_suffix);
3230 const char *p = strrchr(filename, '/');
3237 dest_len = strlen(tempfile_path_prefix) + strlen(p) + strlen(tempfile_suffix) + 2;
3239 if(0 == (*tempfilename = safe_malloc_(dest_len))) {
3240 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3243 local_snprintf(*tempfilename, dest_len, "%s/%s%s", tempfile_path_prefix, p, tempfile_suffix);
3246 if(0 == (*tempfile = flac_fopen(*tempfilename, "w+b"))) {
3247 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
3254 FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3256 FLAC__ASSERT(0 != filename);
3257 FLAC__ASSERT(0 != tempfile);
3258 FLAC__ASSERT(0 != *tempfile);
3259 FLAC__ASSERT(0 != tempfilename);
3260 FLAC__ASSERT(0 != *tempfilename);
3261 FLAC__ASSERT(0 != status);
3263 (void)fclose(*tempfile);
3266 #if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__ || defined __EMX__
3267 /* on some flavors of windows, flac_rename() will fail if the destination already exists */
3268 if(flac_unlink(filename) < 0) {
3269 cleanup_tempfile_(tempfile, tempfilename);
3270 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR;
3275 /*@@@ to fully support the tempfile_path_prefix we need to update this piece to actually copy across filesystems instead of just flac_rename(): */
3276 if(0 != flac_rename(*tempfilename, filename)) {
3277 cleanup_tempfile_(tempfile, tempfilename);
3278 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR;
3282 cleanup_tempfile_(tempfile, tempfilename);
3287 void cleanup_tempfile_(FILE **tempfile, char **tempfilename)
3289 if(0 != *tempfile) {
3290 (void)fclose(*tempfile);
3294 if(0 != *tempfilename) {
3295 (void)flac_unlink(*tempfilename);
3296 free(*tempfilename);
3301 FLAC__bool get_file_stats_(const char *filename, struct flac_stat_s *stats)
3303 FLAC__ASSERT(0 != filename);
3304 FLAC__ASSERT(0 != stats);
3305 return (0 == flac_stat(filename, stats));
3308 void set_file_stats_(const char *filename, struct flac_stat_s *stats)
3310 struct utimbuf srctime;
3312 FLAC__ASSERT(0 != filename);
3313 FLAC__ASSERT(0 != stats);
3315 srctime.actime = stats->st_atime;
3316 srctime.modtime = stats->st_mtime;
3317 (void)flac_chmod(filename, stats->st_mode);
3318 (void)flac_utime(filename, &srctime);
3319 #if !defined _MSC_VER && !defined __BORLANDC__ && !defined __MINGW32__
3320 FLAC_CHECK_RETURN(chown(filename, stats->st_uid, -1));
3321 FLAC_CHECK_RETURN(chown(filename, -1, stats->st_gid));
3325 int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence)
3327 return fseeko((FILE*)handle, (FLAC__off_t)offset, whence);
3330 FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle)
3332 return ftello((FILE*)handle);
3335 FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status)
3338 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK:
3339 return FLAC__METADATA_CHAIN_STATUS_OK;
3340 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT:
3341 return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT;
3342 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE:
3343 return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
3344 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE:
3345 return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
3346 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE:
3347 return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE;
3348 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA:
3349 return FLAC__METADATA_CHAIN_STATUS_BAD_METADATA;
3350 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR:
3351 return FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
3352 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR:
3353 return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
3354 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR:
3355 return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
3356 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR:
3357 return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR;
3358 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR:
3359 return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR;
3360 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR:
3361 return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
3362 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR:
3364 return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;