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.
41 #if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__
42 #if defined __BORLANDC__
43 #include <utime.h> /* for utime() */
45 #include <sys/utime.h> /* for utime() */
47 #include <io.h> /* for chmod() */
48 #include <sys/types.h> /* for off_t */
49 #if _MSC_VER <= 1600 || defined __BORLANDC__ /* @@@ [2G limit] */
54 #include <sys/types.h> /* some flavors of BSD (like OS X) require this to get time_t */
55 #include <utime.h> /* for utime() */
56 #include <unistd.h> /* for chown(), unlink() */
58 #include <sys/stat.h> /* for stat(), maybe chmod() */
60 #include "private/metadata.h"
62 #include "FLAC/assert.h"
63 #include "FLAC/stream_decoder.h"
64 #include "share/alloc.h"
69 #define max(a,b) ((a)>(b)?(a):(b))
73 #define min(a,b) ((a)<(b)?(a):(b))
76 /****************************************************************************
78 * Local function declarations
80 ***************************************************************************/
82 static void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
83 static void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
84 static void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes);
85 static FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes);
86 static FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes);
87 static FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes);
89 static FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator);
90 static FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block);
91 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);
92 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);
93 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block);
94 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);
95 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);
96 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);
97 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);
98 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment *block);
99 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track);
100 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block);
101 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block);
102 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);
104 static FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
105 static FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
106 static FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
107 static FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
108 static FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block);
109 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);
110 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);
111 static FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block);
112 static FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block);
113 static FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block);
114 static FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block);
115 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);
117 static FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block);
118 static FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last);
119 static FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append);
121 static void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator);
122 static FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator);
124 static unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb);
125 static unsigned seek_to_first_metadata_block_(FILE *f);
127 static FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append);
128 static FLAC__bool simple_iterator_copy_file_postfix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, int fixup_is_last_code, off_t fixup_is_last_flag_offset, FLAC__bool backup);
130 static FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status);
131 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, off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status);
132 static FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status);
133 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);
135 static FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
136 static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
137 static void cleanup_tempfile_(FILE **tempfile, char **tempfilename);
139 static FLAC__bool get_file_stats_(const char *filename, struct stat *stats);
140 static void set_file_stats_(const char *filename, struct stat *stats);
142 static int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence);
143 static FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle);
145 static FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status);
148 #ifdef FLAC__VALGRIND_TESTING
149 static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
151 size_t ret = fwrite(ptr, size, nmemb, stream);
157 #define local__fwrite fwrite
160 /****************************************************************************
162 * Level 0 implementation
164 ***************************************************************************/
166 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
167 static void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
168 static void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
171 FLAC__bool got_error;
172 FLAC__StreamMetadata *object;
173 } level0_client_data;
175 static FLAC__StreamMetadata *get_one_metadata_block_(const char *filename, FLAC__MetadataType type)
177 level0_client_data cd;
178 FLAC__StreamDecoder *decoder;
180 FLAC__ASSERT(0 != filename);
182 cd.got_error = false;
185 decoder = FLAC__stream_decoder_new();
190 FLAC__stream_decoder_set_md5_checking(decoder, false);
191 FLAC__stream_decoder_set_metadata_ignore_all(decoder);
192 FLAC__stream_decoder_set_metadata_respond(decoder, type);
194 if(FLAC__stream_decoder_init_file(decoder, filename, write_callback_, metadata_callback_, error_callback_, &cd) != FLAC__STREAM_DECODER_INIT_STATUS_OK || cd.got_error) {
195 (void)FLAC__stream_decoder_finish(decoder);
196 FLAC__stream_decoder_delete(decoder);
200 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder) || cd.got_error) {
201 (void)FLAC__stream_decoder_finish(decoder);
202 FLAC__stream_decoder_delete(decoder);
204 FLAC__metadata_object_delete(cd.object);
208 (void)FLAC__stream_decoder_finish(decoder);
209 FLAC__stream_decoder_delete(decoder);
214 FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo)
216 FLAC__StreamMetadata *object;
218 FLAC__ASSERT(0 != filename);
219 FLAC__ASSERT(0 != streaminfo);
221 object = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_STREAMINFO);
224 /* can just copy the contents since STREAMINFO has no internal structure */
225 *streaminfo = *object;
226 FLAC__metadata_object_delete(object);
234 FLAC_API FLAC__bool FLAC__metadata_get_tags(const char *filename, FLAC__StreamMetadata **tags)
236 FLAC__ASSERT(0 != filename);
237 FLAC__ASSERT(0 != tags);
239 *tags = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_VORBIS_COMMENT);
244 FLAC_API FLAC__bool FLAC__metadata_get_cuesheet(const char *filename, FLAC__StreamMetadata **cuesheet)
246 FLAC__ASSERT(0 != filename);
247 FLAC__ASSERT(0 != cuesheet);
249 *cuesheet = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_CUESHEET);
251 return 0 != *cuesheet;
254 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
256 (void)decoder, (void)frame, (void)buffer, (void)client_data;
258 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
261 void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
263 level0_client_data *cd = (level0_client_data *)client_data;
267 * we assume we only get here when the one metadata block we were
268 * looking for was passed to us
270 if(!cd->got_error && 0 == cd->object) {
271 if(0 == (cd->object = FLAC__metadata_object_clone(metadata)))
272 cd->got_error = true;
276 void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
278 level0_client_data *cd = (level0_client_data *)client_data;
281 if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
282 cd->got_error = true;
285 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)
287 FLAC__Metadata_SimpleIterator *it;
288 FLAC__uint64 max_area_seen = 0;
289 FLAC__uint64 max_depth_seen = 0;
291 FLAC__ASSERT(0 != filename);
292 FLAC__ASSERT(0 != picture);
296 it = FLAC__metadata_simple_iterator_new();
299 if(!FLAC__metadata_simple_iterator_init(it, filename, /*read_only=*/true, /*preserve_file_stats=*/true)) {
300 FLAC__metadata_simple_iterator_delete(it);
304 if(FLAC__metadata_simple_iterator_get_block_type(it) == FLAC__METADATA_TYPE_PICTURE) {
305 FLAC__StreamMetadata *obj = FLAC__metadata_simple_iterator_get_block(it);
306 FLAC__uint64 area = (FLAC__uint64)obj->data.picture.width * (FLAC__uint64)obj->data.picture.height;
307 /* check constraints */
309 (type == (FLAC__StreamMetadata_Picture_Type)(-1) || type == obj->data.picture.type) &&
310 (mime_type == 0 || !strcmp(mime_type, obj->data.picture.mime_type)) &&
311 (description == 0 || !strcmp((const char *)description, (const char *)obj->data.picture.description)) &&
312 obj->data.picture.width <= max_width &&
313 obj->data.picture.height <= max_height &&
314 obj->data.picture.depth <= max_depth &&
315 obj->data.picture.colors <= max_colors &&
316 (area > max_area_seen || (area == max_area_seen && obj->data.picture.depth > max_depth_seen))
319 FLAC__metadata_object_delete(*picture);
321 max_area_seen = area;
322 max_depth_seen = obj->data.picture.depth;
325 FLAC__metadata_object_delete(obj);
328 } while(FLAC__metadata_simple_iterator_next(it));
330 FLAC__metadata_simple_iterator_delete(it);
332 return (0 != *picture);
336 /****************************************************************************
338 * Level 1 implementation
340 ***************************************************************************/
342 #define SIMPLE_ITERATOR_MAX_PUSH_DEPTH (1+4)
343 /* 1 for initial offset, +4 for our own personal use */
345 struct FLAC__Metadata_SimpleIterator {
347 char *filename, *tempfile_path_prefix;
349 FLAC__bool has_stats;
350 FLAC__bool is_writable;
351 FLAC__Metadata_SimpleIteratorStatus status;
352 off_t offset[SIMPLE_ITERATOR_MAX_PUSH_DEPTH];
353 off_t first_offset; /* this is the offset to the STREAMINFO block */
355 /* this is the metadata block header of the current block we are pointing to: */
357 FLAC__MetadataType type;
361 FLAC_API const char * const FLAC__Metadata_SimpleIteratorStatusString[] = {
362 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK",
363 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT",
364 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE",
365 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE",
366 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE",
367 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA",
368 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR",
369 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR",
370 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR",
371 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR",
372 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR",
373 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR",
374 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR"
378 FLAC_API FLAC__Metadata_SimpleIterator *FLAC__metadata_simple_iterator_new(void)
380 FLAC__Metadata_SimpleIterator *iterator = (FLAC__Metadata_SimpleIterator*)calloc(1, sizeof(FLAC__Metadata_SimpleIterator));
384 iterator->filename = 0;
385 iterator->tempfile_path_prefix = 0;
386 iterator->has_stats = false;
387 iterator->is_writable = false;
388 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
389 iterator->first_offset = iterator->offset[0] = -1;
396 static void simple_iterator_free_guts_(FLAC__Metadata_SimpleIterator *iterator)
398 FLAC__ASSERT(0 != iterator);
400 if(0 != iterator->file) {
401 fclose(iterator->file);
403 if(iterator->has_stats)
404 set_file_stats_(iterator->filename, &iterator->stats);
406 if(0 != iterator->filename) {
407 free(iterator->filename);
408 iterator->filename = 0;
410 if(0 != iterator->tempfile_path_prefix) {
411 free(iterator->tempfile_path_prefix);
412 iterator->tempfile_path_prefix = 0;
416 FLAC_API void FLAC__metadata_simple_iterator_delete(FLAC__Metadata_SimpleIterator *iterator)
418 FLAC__ASSERT(0 != iterator);
420 simple_iterator_free_guts_(iterator);
424 FLAC_API FLAC__Metadata_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__Metadata_SimpleIterator *iterator)
426 FLAC__Metadata_SimpleIteratorStatus status;
428 FLAC__ASSERT(0 != iterator);
430 status = iterator->status;
431 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
435 static FLAC__bool simple_iterator_prime_input_(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool read_only)
439 FLAC__ASSERT(0 != iterator);
441 if(read_only || 0 == (iterator->file = fopen(iterator->filename, "r+b"))) {
442 iterator->is_writable = false;
443 if(read_only || errno == EACCES) {
444 if(0 == (iterator->file = fopen(iterator->filename, "rb"))) {
445 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
450 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
455 iterator->is_writable = true;
458 ret = seek_to_first_metadata_block_(iterator->file);
462 iterator->first_offset = iterator->offset[iterator->depth] = ftello(iterator->file);
463 return read_metadata_block_header_(iterator);
465 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
468 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
471 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE;
480 @@@ If we decide to finish implementing this, put this comment back in metadata.h
482 * The 'tempfile_path_prefix' allows you to specify a directory where
483 * tempfiles should go. Remember that if your metadata edits cause the
484 * FLAC file to grow, the entire file will have to be rewritten. If
485 * 'tempfile_path_prefix' is NULL, the temp file will be written in the
486 * same directory as the original FLAC file. This makes replacing the
487 * original with the tempfile fast but requires extra space in the same
488 * partition for the tempfile. If space is a problem, you can pass a
489 * directory name belonging to a different partition in
490 * 'tempfile_path_prefix'. Note that you should use the forward slash
491 * '/' as the directory separator. A trailing slash is not needed; it
492 * will be added automatically.
494 FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats, const char *tempfile_path_prefix);
497 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)
499 const char *tempfile_path_prefix = 0; /*@@@ search for comments near 'rename(...)' for what it will take to finish implementing this */
501 FLAC__ASSERT(0 != iterator);
502 FLAC__ASSERT(0 != filename);
504 simple_iterator_free_guts_(iterator);
506 if(!read_only && preserve_file_stats)
507 iterator->has_stats = get_file_stats_(filename, &iterator->stats);
509 if(0 == (iterator->filename = strdup(filename))) {
510 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
513 if(0 != tempfile_path_prefix && 0 == (iterator->tempfile_path_prefix = strdup(tempfile_path_prefix))) {
514 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
518 return simple_iterator_prime_input_(iterator, read_only);
521 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__Metadata_SimpleIterator *iterator)
523 FLAC__ASSERT(0 != iterator);
524 FLAC__ASSERT(0 != iterator->file);
526 return iterator->is_writable;
529 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__Metadata_SimpleIterator *iterator)
531 FLAC__ASSERT(0 != iterator);
532 FLAC__ASSERT(0 != iterator->file);
534 if(iterator->is_last)
537 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
538 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
542 iterator->offset[iterator->depth] = ftello(iterator->file);
544 return read_metadata_block_header_(iterator);
547 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__Metadata_SimpleIterator *iterator)
551 FLAC__ASSERT(0 != iterator);
552 FLAC__ASSERT(0 != iterator->file);
554 if(iterator->offset[iterator->depth] == iterator->first_offset)
557 if(0 != fseeko(iterator->file, iterator->first_offset, SEEK_SET)) {
558 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
561 this_offset = iterator->first_offset;
562 if(!read_metadata_block_header_(iterator))
565 /* we ignore any error from ftello() and catch it in fseeko() */
566 while(ftello(iterator->file) + (off_t)iterator->length < iterator->offset[iterator->depth]) {
567 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
568 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
571 this_offset = ftello(iterator->file);
572 if(!read_metadata_block_header_(iterator))
576 iterator->offset[iterator->depth] = this_offset;
582 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_last(const FLAC__Metadata_SimpleIterator *iterator)
584 FLAC__ASSERT(0 != iterator);
585 FLAC__ASSERT(0 != iterator->file);
587 return iterator->is_last;
591 FLAC_API off_t FLAC__metadata_simple_iterator_get_block_offset(const FLAC__Metadata_SimpleIterator *iterator)
593 FLAC__ASSERT(0 != iterator);
594 FLAC__ASSERT(0 != iterator->file);
596 return iterator->offset[iterator->depth];
599 FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator)
601 FLAC__ASSERT(0 != iterator);
602 FLAC__ASSERT(0 != iterator->file);
604 return iterator->type;
608 FLAC_API unsigned FLAC__metadata_simple_iterator_get_block_length(const FLAC__Metadata_SimpleIterator *iterator)
610 FLAC__ASSERT(0 != iterator);
611 FLAC__ASSERT(0 != iterator->file);
613 return iterator->length;
617 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_get_application_id(FLAC__Metadata_SimpleIterator *iterator, FLAC__byte *id)
619 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
621 FLAC__ASSERT(0 != iterator);
622 FLAC__ASSERT(0 != iterator->file);
623 FLAC__ASSERT(0 != id);
625 if(iterator->type != FLAC__METADATA_TYPE_APPLICATION) {
626 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
630 if(fread(id, 1, id_bytes, iterator->file) != id_bytes) {
631 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
636 if(0 != fseeko(iterator->file, -((int)id_bytes), SEEK_CUR)) {
637 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
644 FLAC_API FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator)
646 FLAC__StreamMetadata *block = FLAC__metadata_object_new(iterator->type);
648 FLAC__ASSERT(0 != iterator);
649 FLAC__ASSERT(0 != iterator->file);
652 block->is_last = iterator->is_last;
653 block->length = iterator->length;
655 if(!read_metadata_block_data_(iterator, block)) {
656 FLAC__metadata_object_delete(block);
660 /* back up to the beginning of the block data to stay consistent */
661 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH, SEEK_SET)) {
662 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
663 FLAC__metadata_object_delete(block);
668 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
673 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
675 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth];)
678 FLAC__ASSERT(0 != iterator);
679 FLAC__ASSERT(0 != iterator->file);
680 FLAC__ASSERT(0 != block);
682 if(!iterator->is_writable) {
683 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
687 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO || block->type == FLAC__METADATA_TYPE_STREAMINFO) {
688 if(iterator->type != block->type) {
689 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
694 block->is_last = iterator->is_last;
696 if(iterator->length == block->length)
697 return write_metadata_block_stationary_(iterator, block);
698 else if(iterator->length > block->length) {
699 if(use_padding && iterator->length >= FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) {
700 ret = write_metadata_block_stationary_with_padding_(iterator, block, iterator->length - FLAC__STREAM_METADATA_HEADER_LENGTH - block->length, block->is_last);
701 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
702 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
706 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
707 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
708 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
712 else /* iterator->length < block->length */ {
713 unsigned padding_leftover = 0;
714 FLAC__bool padding_is_last = false;
716 /* first see if we can even use padding */
717 if(iterator->is_last) {
721 const unsigned extra_padding_bytes_required = block->length - iterator->length;
722 simple_iterator_push_(iterator);
723 if(!FLAC__metadata_simple_iterator_next(iterator)) {
724 (void)simple_iterator_pop_(iterator);
727 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
731 if(FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length == extra_padding_bytes_required) {
732 padding_leftover = 0;
733 block->is_last = iterator->is_last;
735 else if(iterator->length < extra_padding_bytes_required)
738 padding_leftover = FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length - extra_padding_bytes_required;
739 padding_is_last = iterator->is_last;
740 block->is_last = false;
743 if(!simple_iterator_pop_(iterator))
748 if(padding_leftover == 0) {
749 ret = write_metadata_block_stationary_(iterator, block);
750 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
751 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
755 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
756 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
757 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
758 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
763 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
764 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
765 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
771 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
773 unsigned padding_leftover = 0;
774 FLAC__bool padding_is_last = false;
776 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length;)
779 FLAC__ASSERT(0 != iterator);
780 FLAC__ASSERT(0 != iterator->file);
781 FLAC__ASSERT(0 != block);
783 if(!iterator->is_writable)
786 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
787 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
791 block->is_last = iterator->is_last;
794 /* first see if we can even use padding */
795 if(iterator->is_last) {
799 simple_iterator_push_(iterator);
800 if(!FLAC__metadata_simple_iterator_next(iterator)) {
801 (void)simple_iterator_pop_(iterator);
804 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
808 if(iterator->length == block->length) {
809 padding_leftover = 0;
810 block->is_last = iterator->is_last;
812 else if(iterator->length < FLAC__STREAM_METADATA_HEADER_LENGTH + block->length)
815 padding_leftover = iterator->length - block->length;
816 padding_is_last = iterator->is_last;
817 block->is_last = false;
820 if(!simple_iterator_pop_(iterator))
825 /* move to the next block, which is suitable padding */
826 if(!FLAC__metadata_simple_iterator_next(iterator))
828 if(padding_leftover == 0) {
829 ret = write_metadata_block_stationary_(iterator, block);
830 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
831 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
835 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
836 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
837 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
838 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
843 ret = rewrite_whole_file_(iterator, block, /*append=*/true);
844 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
845 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
850 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool use_padding)
852 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth];)
855 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO) {
856 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
861 FLAC__StreamMetadata *padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
863 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
866 padding->length = iterator->length;
867 if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false)) {
868 FLAC__metadata_object_delete(padding);
871 FLAC__metadata_object_delete(padding);
872 if(!FLAC__metadata_simple_iterator_prev(iterator))
874 FLAC__ASSERT(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length == debug_target_offset);
875 FLAC__ASSERT(ftello(iterator->file) + (off_t)iterator->length == debug_target_offset);
879 ret = rewrite_whole_file_(iterator, 0, /*append=*/false);
880 FLAC__ASSERT(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length == debug_target_offset);
881 FLAC__ASSERT(ftello(iterator->file) + (off_t)iterator->length == debug_target_offset);
888 /****************************************************************************
890 * Level 2 implementation
892 ***************************************************************************/
895 typedef struct FLAC__Metadata_Node {
896 FLAC__StreamMetadata *data;
897 struct FLAC__Metadata_Node *prev, *next;
898 } FLAC__Metadata_Node;
900 struct FLAC__Metadata_Chain {
901 char *filename; /* will be NULL if using callbacks */
903 FLAC__Metadata_Node *head;
904 FLAC__Metadata_Node *tail;
906 FLAC__Metadata_ChainStatus status;
907 off_t first_offset, last_offset;
909 * This is the length of the chain initially read from the FLAC file.
910 * it is used to compare against the current length to decide whether
911 * or not the whole file has to be rewritten.
913 off_t initial_length;
914 /* @@@ hacky, these are currently only needed by ogg reader */
915 FLAC__IOHandle handle;
916 FLAC__IOCallback_Read read_cb;
919 struct FLAC__Metadata_Iterator {
920 FLAC__Metadata_Chain *chain;
921 FLAC__Metadata_Node *current;
924 FLAC_API const char * const FLAC__Metadata_ChainStatusString[] = {
925 "FLAC__METADATA_CHAIN_STATUS_OK",
926 "FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT",
927 "FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE",
928 "FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE",
929 "FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE",
930 "FLAC__METADATA_CHAIN_STATUS_BAD_METADATA",
931 "FLAC__METADATA_CHAIN_STATUS_READ_ERROR",
932 "FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR",
933 "FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR",
934 "FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR",
935 "FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR",
936 "FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR",
937 "FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR",
938 "FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS",
939 "FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH",
940 "FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL"
944 static FLAC__Metadata_Node *node_new_(void)
946 return (FLAC__Metadata_Node*)calloc(1, sizeof(FLAC__Metadata_Node));
949 static void node_delete_(FLAC__Metadata_Node *node)
951 FLAC__ASSERT(0 != node);
953 FLAC__metadata_object_delete(node->data);
957 static void chain_init_(FLAC__Metadata_Chain *chain)
959 FLAC__ASSERT(0 != chain);
962 chain->is_ogg = false;
963 chain->head = chain->tail = 0;
965 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
966 chain->initial_length = 0;
970 static void chain_clear_(FLAC__Metadata_Chain *chain)
972 FLAC__Metadata_Node *node, *next;
974 FLAC__ASSERT(0 != chain);
976 for(node = chain->head; node; ) {
982 if(0 != chain->filename)
983 free(chain->filename);
988 static void chain_append_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
990 FLAC__ASSERT(0 != chain);
991 FLAC__ASSERT(0 != node);
992 FLAC__ASSERT(0 != node->data);
994 node->next = node->prev = 0;
995 node->data->is_last = true;
997 chain->tail->data->is_last = false;
1002 FLAC__ASSERT(0 != chain->tail);
1003 chain->tail->next = node;
1004 node->prev = chain->tail;
1010 static void chain_remove_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1012 FLAC__ASSERT(0 != chain);
1013 FLAC__ASSERT(0 != node);
1015 if(node == chain->head)
1016 chain->head = node->next;
1018 node->prev->next = node->next;
1020 if(node == chain->tail)
1021 chain->tail = node->prev;
1023 node->next->prev = node->prev;
1025 if(0 != chain->tail)
1026 chain->tail->data->is_last = true;
1031 static void chain_delete_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1033 chain_remove_node_(chain, node);
1037 static off_t chain_calculate_length_(FLAC__Metadata_Chain *chain)
1039 const FLAC__Metadata_Node *node;
1041 for(node = chain->head; node; node = node->next)
1042 length += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1046 static void iterator_insert_node_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1048 FLAC__ASSERT(0 != node);
1049 FLAC__ASSERT(0 != node->data);
1050 FLAC__ASSERT(0 != iterator);
1051 FLAC__ASSERT(0 != iterator->current);
1052 FLAC__ASSERT(0 != iterator->chain);
1053 FLAC__ASSERT(0 != iterator->chain->head);
1054 FLAC__ASSERT(0 != iterator->chain->tail);
1056 node->data->is_last = false;
1058 node->prev = iterator->current->prev;
1059 node->next = iterator->current;
1062 iterator->chain->head = node;
1064 node->prev->next = node;
1066 iterator->current->prev = node;
1068 iterator->chain->nodes++;
1071 static void iterator_insert_node_after_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1073 FLAC__ASSERT(0 != node);
1074 FLAC__ASSERT(0 != node->data);
1075 FLAC__ASSERT(0 != iterator);
1076 FLAC__ASSERT(0 != iterator->current);
1077 FLAC__ASSERT(0 != iterator->chain);
1078 FLAC__ASSERT(0 != iterator->chain->head);
1079 FLAC__ASSERT(0 != iterator->chain->tail);
1081 iterator->current->data->is_last = false;
1083 node->prev = iterator->current;
1084 node->next = iterator->current->next;
1087 iterator->chain->tail = node;
1089 node->next->prev = node;
1091 node->prev->next = node;
1093 iterator->chain->tail->data->is_last = true;
1095 iterator->chain->nodes++;
1098 /* return true iff node and node->next are both padding */
1099 static FLAC__bool chain_merge_adjacent_padding_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1101 if(node->data->type == FLAC__METADATA_TYPE_PADDING && 0 != node->next && node->next->data->type == FLAC__METADATA_TYPE_PADDING) {
1102 const unsigned growth = FLAC__STREAM_METADATA_HEADER_LENGTH + node->next->data->length;
1103 node->data->length += growth;
1105 chain_delete_node_(chain, node->next);
1112 /* Returns the new length of the chain, or 0 if there was an error. */
1113 /* WATCHOUT: This can get called multiple times before a write, so
1114 * it should still work when this happens.
1116 /* WATCHOUT: Make sure to also update the logic in
1117 * FLAC__metadata_chain_check_if_tempfile_needed() if the logic here changes.
1119 static off_t chain_prepare_for_write_(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1121 off_t current_length = chain_calculate_length_(chain);
1124 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1125 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1126 const off_t delta = chain->initial_length - current_length;
1127 chain->tail->data->length += delta;
1128 current_length += delta;
1129 FLAC__ASSERT(current_length == chain->initial_length);
1131 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1132 else if(current_length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) {
1133 FLAC__StreamMetadata *padding;
1134 FLAC__Metadata_Node *node;
1135 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) {
1136 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1139 padding->length = chain->initial_length - (FLAC__STREAM_METADATA_HEADER_LENGTH + current_length);
1140 if(0 == (node = node_new_())) {
1141 FLAC__metadata_object_delete(padding);
1142 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1145 node->data = padding;
1146 chain_append_node_(chain, node);
1147 current_length = chain_calculate_length_(chain);
1148 FLAC__ASSERT(current_length == chain->initial_length);
1150 /* 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 */
1151 else if(current_length > chain->initial_length) {
1152 const off_t delta = current_length - chain->initial_length;
1153 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1154 /* if the delta is exactly the size of the last padding block, remove the padding block */
1155 if((off_t)chain->tail->data->length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta) {
1156 chain_delete_node_(chain, chain->tail);
1157 current_length = chain_calculate_length_(chain);
1158 FLAC__ASSERT(current_length == chain->initial_length);
1160 /* if there is at least 'delta' bytes of padding, trim the padding down */
1161 else if((off_t)chain->tail->data->length >= delta) {
1162 chain->tail->data->length -= delta;
1163 current_length -= delta;
1164 FLAC__ASSERT(current_length == chain->initial_length);
1170 return current_length;
1173 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)
1175 FLAC__Metadata_Node *node;
1177 FLAC__ASSERT(0 != chain);
1179 /* we assume we're already at the beginning of the file */
1181 switch(seek_to_first_metadata_block_cb_(handle, read_cb, seek_cb)) {
1185 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1188 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1191 chain->status = FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
1199 FLAC__int64 pos = tell_cb(handle);
1201 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1204 chain->first_offset = (off_t)pos;
1209 FLAC__MetadataType type;
1215 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1219 if(!read_metadata_block_header_cb_(handle, read_cb, &is_last, &type, &length)) {
1221 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1225 node->data = FLAC__metadata_object_new(type);
1226 if(0 == node->data) {
1228 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1232 node->data->is_last = is_last;
1233 node->data->length = length;
1235 chain->status = get_equivalent_status_(read_metadata_block_data_cb_(handle, read_cb, seek_cb, node->data));
1236 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1240 chain_append_node_(chain, node);
1245 FLAC__int64 pos = tell_cb(handle);
1247 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1250 chain->last_offset = (off_t)pos;
1253 chain->initial_length = chain_calculate_length_(chain);
1258 static FLAC__StreamDecoderReadStatus chain_read_ogg_read_cb_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
1260 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1262 if(*bytes > 0 && chain->status == FLAC__METADATA_CHAIN_STATUS_OK) {
1263 *bytes = chain->read_cb(buffer, sizeof(FLAC__byte), *bytes, chain->handle);
1265 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
1267 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
1270 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
1273 static FLAC__StreamDecoderWriteStatus chain_read_ogg_write_cb_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
1275 (void)decoder, (void)frame, (void)buffer, (void)client_data;
1276 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1279 static void chain_read_ogg_metadata_cb_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
1281 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1282 FLAC__Metadata_Node *node;
1288 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1292 node->data = FLAC__metadata_object_clone(metadata);
1293 if(0 == node->data) {
1295 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1299 chain_append_node_(chain, node);
1302 static void chain_read_ogg_error_cb_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1304 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1305 (void)decoder, (void)status;
1306 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1309 static FLAC__bool chain_read_ogg_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb)
1311 FLAC__StreamDecoder *decoder;
1313 FLAC__ASSERT(0 != chain);
1315 /* we assume we're already at the beginning of the file */
1317 chain->handle = handle;
1318 chain->read_cb = read_cb;
1319 if(0 == (decoder = FLAC__stream_decoder_new())) {
1320 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1323 FLAC__stream_decoder_set_metadata_respond_all(decoder);
1324 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) {
1325 FLAC__stream_decoder_delete(decoder);
1326 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1330 chain->first_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1332 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder))
1333 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1334 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1335 FLAC__stream_decoder_delete(decoder);
1339 FLAC__stream_decoder_delete(decoder);
1341 chain->last_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1343 chain->initial_length = chain_calculate_length_(chain);
1348 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)
1350 FLAC__Metadata_Node *node;
1352 FLAC__ASSERT(0 != chain);
1353 FLAC__ASSERT(0 != chain->head);
1355 if(0 != seek_cb(handle, chain->first_offset, SEEK_SET)) {
1356 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1360 for(node = chain->head; node; node = node->next) {
1361 if(!write_metadata_block_header_cb_(handle, write_cb, node->data)) {
1362 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1365 if(!write_metadata_block_data_cb_(handle, write_cb, node->data)) {
1366 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1371 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1373 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1377 static FLAC__bool chain_rewrite_metadata_in_place_(FLAC__Metadata_Chain *chain)
1382 FLAC__ASSERT(0 != chain->filename);
1384 if(0 == (file = fopen(chain->filename, "r+b"))) {
1385 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1389 /* chain_rewrite_metadata_in_place_cb_() sets chain->status for us */
1390 ret = chain_rewrite_metadata_in_place_cb_(chain, (FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, fseek_wrapper_);
1397 static FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix)
1401 FLAC__Metadata_SimpleIteratorStatus status;
1402 const FLAC__Metadata_Node *node;
1404 FLAC__ASSERT(0 != chain);
1405 FLAC__ASSERT(0 != chain->filename);
1406 FLAC__ASSERT(0 != chain->head);
1408 /* copy the file prefix (data up to first metadata block */
1409 if(0 == (f = fopen(chain->filename, "rb"))) {
1410 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1413 if(!open_tempfile_(chain->filename, tempfile_path_prefix, &tempfile, &tempfilename, &status)) {
1414 chain->status = get_equivalent_status_(status);
1417 if(!copy_n_bytes_from_file_(f, tempfile, chain->first_offset, &status)) {
1418 chain->status = get_equivalent_status_(status);
1422 /* write the metadata */
1423 for(node = chain->head; node; node = node->next) {
1424 if(!write_metadata_block_header_(tempfile, &status, node->data)) {
1425 chain->status = get_equivalent_status_(status);
1428 if(!write_metadata_block_data_(tempfile, &status, node->data)) {
1429 chain->status = get_equivalent_status_(status);
1433 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1435 /* copy the file postfix (everything after the metadata) */
1436 if(0 != fseeko(f, chain->last_offset, SEEK_SET)) {
1437 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1440 if(!copy_remaining_bytes_from_file_(f, tempfile, &status)) {
1441 chain->status = get_equivalent_status_(status);
1445 /* move the tempfile on top of the original */
1447 if(!transport_tempfile_(chain->filename, &tempfile, &tempfilename, &status))
1454 cleanup_tempfile_(&tempfile, &tempfilename);
1458 /* assumes 'handle' is already at beginning of file */
1459 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)
1461 FLAC__Metadata_SimpleIteratorStatus status;
1462 const FLAC__Metadata_Node *node;
1464 FLAC__ASSERT(0 != chain);
1465 FLAC__ASSERT(0 == chain->filename);
1466 FLAC__ASSERT(0 != chain->head);
1468 /* copy the file prefix (data up to first metadata block */
1469 if(!copy_n_bytes_from_file_cb_(handle, read_cb, temp_handle, temp_write_cb, chain->first_offset, &status)) {
1470 chain->status = get_equivalent_status_(status);
1474 /* write the metadata */
1475 for(node = chain->head; node; node = node->next) {
1476 if(!write_metadata_block_header_cb_(temp_handle, temp_write_cb, node->data)) {
1477 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1480 if(!write_metadata_block_data_cb_(temp_handle, temp_write_cb, node->data)) {
1481 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1485 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1487 /* copy the file postfix (everything after the metadata) */
1488 if(0 != seek_cb(handle, chain->last_offset, SEEK_SET)) {
1489 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1492 if(!copy_remaining_bytes_from_file_cb_(handle, read_cb, eof_cb, temp_handle, temp_write_cb, &status)) {
1493 chain->status = get_equivalent_status_(status);
1500 FLAC_API FLAC__Metadata_Chain *FLAC__metadata_chain_new(void)
1502 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)calloc(1, sizeof(FLAC__Metadata_Chain));
1510 FLAC_API void FLAC__metadata_chain_delete(FLAC__Metadata_Chain *chain)
1512 FLAC__ASSERT(0 != chain);
1514 chain_clear_(chain);
1519 FLAC_API FLAC__Metadata_ChainStatus FLAC__metadata_chain_status(FLAC__Metadata_Chain *chain)
1521 FLAC__Metadata_ChainStatus status;
1523 FLAC__ASSERT(0 != chain);
1525 status = chain->status;
1526 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1530 static FLAC__bool chain_read_(FLAC__Metadata_Chain *chain, const char *filename, FLAC__bool is_ogg)
1535 FLAC__ASSERT(0 != chain);
1536 FLAC__ASSERT(0 != filename);
1538 chain_clear_(chain);
1540 if(0 == (chain->filename = strdup(filename))) {
1541 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1545 chain->is_ogg = is_ogg;
1547 if(0 == (file = fopen(filename, "rb"))) {
1548 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1552 /* the function also sets chain->status for us */
1554 chain_read_ogg_cb_(chain, file, (FLAC__IOCallback_Read)fread) :
1555 chain_read_cb_(chain, file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, ftell_wrapper_)
1563 FLAC_API FLAC__bool FLAC__metadata_chain_read(FLAC__Metadata_Chain *chain, const char *filename)
1565 return chain_read_(chain, filename, /*is_ogg=*/false);
1568 /*@@@@add to tests*/
1569 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg(FLAC__Metadata_Chain *chain, const char *filename)
1571 return chain_read_(chain, filename, /*is_ogg=*/true);
1574 static FLAC__bool chain_read_with_callbacks_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks, FLAC__bool is_ogg)
1578 FLAC__ASSERT(0 != chain);
1580 chain_clear_(chain);
1582 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.tell) {
1583 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1587 chain->is_ogg = is_ogg;
1590 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1591 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1595 /* the function also sets chain->status for us */
1597 chain_read_ogg_cb_(chain, handle, callbacks.read) :
1598 chain_read_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.tell)
1604 FLAC_API FLAC__bool FLAC__metadata_chain_read_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1606 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/false);
1609 /*@@@@add to tests*/
1610 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1612 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/true);
1615 FLAC_API FLAC__bool FLAC__metadata_chain_check_if_tempfile_needed(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1617 /* This does all the same checks that are in chain_prepare_for_write_()
1618 * but doesn't actually alter the chain. Make sure to update the logic
1619 * here if chain_prepare_for_write_() changes.
1621 const off_t current_length = chain_calculate_length_(chain);
1623 FLAC__ASSERT(0 != chain);
1626 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1627 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING)
1629 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1630 else if(current_length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length)
1632 /* 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 */
1633 else if(current_length > chain->initial_length) {
1634 const off_t delta = current_length - chain->initial_length;
1635 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1636 /* if the delta is exactly the size of the last padding block, remove the padding block */
1637 if((off_t)chain->tail->data->length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta)
1639 /* if there is at least 'delta' bytes of padding, trim the padding down */
1640 else if((off_t)chain->tail->data->length >= delta)
1646 return (current_length != chain->initial_length);
1649 FLAC_API FLAC__bool FLAC__metadata_chain_write(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats)
1652 const char *tempfile_path_prefix = 0;
1653 off_t current_length;
1655 FLAC__ASSERT(0 != chain);
1657 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1658 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1662 if (0 == chain->filename) {
1663 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1667 current_length = chain_prepare_for_write_(chain, use_padding);
1669 /* a return value of 0 means there was an error; chain->status is already set */
1670 if (0 == current_length)
1673 if(preserve_file_stats)
1674 get_file_stats_(chain->filename, &stats);
1676 if(current_length == chain->initial_length) {
1677 if(!chain_rewrite_metadata_in_place_(chain))
1681 if(!chain_rewrite_file_(chain, tempfile_path_prefix))
1684 /* recompute lengths and offsets */
1686 const FLAC__Metadata_Node *node;
1687 chain->initial_length = current_length;
1688 chain->last_offset = chain->first_offset;
1689 for(node = chain->head; node; node = node->next)
1690 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1694 if(preserve_file_stats)
1695 set_file_stats_(chain->filename, &stats);
1700 FLAC_API FLAC__bool FLAC__metadata_chain_write_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1702 off_t current_length;
1704 FLAC__ASSERT(0 != chain);
1706 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1707 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1711 if (0 != chain->filename) {
1712 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1716 if (0 == callbacks.write || 0 == callbacks.seek) {
1717 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1721 if (FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1722 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1726 current_length = chain_prepare_for_write_(chain, use_padding);
1728 /* a return value of 0 means there was an error; chain->status is already set */
1729 if (0 == current_length)
1732 FLAC__ASSERT(current_length == chain->initial_length);
1734 return chain_rewrite_metadata_in_place_cb_(chain, handle, callbacks.write, callbacks.seek);
1737 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)
1739 off_t current_length;
1741 FLAC__ASSERT(0 != chain);
1743 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1744 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1748 if (0 != chain->filename) {
1749 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1753 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.eof) {
1754 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1757 if (0 == temp_callbacks.write) {
1758 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1762 if (!FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1763 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1767 current_length = chain_prepare_for_write_(chain, use_padding);
1769 /* a return value of 0 means there was an error; chain->status is already set */
1770 if (0 == current_length)
1773 FLAC__ASSERT(current_length != chain->initial_length);
1776 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1777 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1781 if(!chain_rewrite_file_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.eof, temp_handle, temp_callbacks.write))
1784 /* recompute lengths and offsets */
1786 const FLAC__Metadata_Node *node;
1787 chain->initial_length = current_length;
1788 chain->last_offset = chain->first_offset;
1789 for(node = chain->head; node; node = node->next)
1790 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1796 FLAC_API void FLAC__metadata_chain_merge_padding(FLAC__Metadata_Chain *chain)
1798 FLAC__Metadata_Node *node;
1800 FLAC__ASSERT(0 != chain);
1802 for(node = chain->head; node; ) {
1803 if(!chain_merge_adjacent_padding_(chain, node))
1808 FLAC_API void FLAC__metadata_chain_sort_padding(FLAC__Metadata_Chain *chain)
1810 FLAC__Metadata_Node *node, *save;
1813 FLAC__ASSERT(0 != chain);
1816 * Don't try and be too smart... this simple algo is good enough for
1817 * the small number of nodes that we deal with.
1819 for(i = 0, node = chain->head; i < chain->nodes; i++) {
1820 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1822 chain_remove_node_(chain, node);
1823 chain_append_node_(chain, node);
1831 FLAC__metadata_chain_merge_padding(chain);
1835 FLAC_API FLAC__Metadata_Iterator *FLAC__metadata_iterator_new(void)
1837 FLAC__Metadata_Iterator *iterator = (FLAC__Metadata_Iterator*)calloc(1, sizeof(FLAC__Metadata_Iterator));
1839 /* calloc() implies:
1840 iterator->current = 0;
1841 iterator->chain = 0;
1847 FLAC_API void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator)
1849 FLAC__ASSERT(0 != iterator);
1854 FLAC_API void FLAC__metadata_iterator_init(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Chain *chain)
1856 FLAC__ASSERT(0 != iterator);
1857 FLAC__ASSERT(0 != chain);
1858 FLAC__ASSERT(0 != chain->head);
1860 iterator->chain = chain;
1861 iterator->current = chain->head;
1864 FLAC_API FLAC__bool FLAC__metadata_iterator_next(FLAC__Metadata_Iterator *iterator)
1866 FLAC__ASSERT(0 != iterator);
1868 if(0 == iterator->current || 0 == iterator->current->next)
1871 iterator->current = iterator->current->next;
1875 FLAC_API FLAC__bool FLAC__metadata_iterator_prev(FLAC__Metadata_Iterator *iterator)
1877 FLAC__ASSERT(0 != iterator);
1879 if(0 == iterator->current || 0 == iterator->current->prev)
1882 iterator->current = iterator->current->prev;
1886 FLAC_API FLAC__MetadataType FLAC__metadata_iterator_get_block_type(const FLAC__Metadata_Iterator *iterator)
1888 FLAC__ASSERT(0 != iterator);
1889 FLAC__ASSERT(0 != iterator->current);
1890 FLAC__ASSERT(0 != iterator->current->data);
1892 return iterator->current->data->type;
1895 FLAC_API FLAC__StreamMetadata *FLAC__metadata_iterator_get_block(FLAC__Metadata_Iterator *iterator)
1897 FLAC__ASSERT(0 != iterator);
1898 FLAC__ASSERT(0 != iterator->current);
1900 return iterator->current->data;
1903 FLAC_API FLAC__bool FLAC__metadata_iterator_set_block(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1905 FLAC__ASSERT(0 != iterator);
1906 FLAC__ASSERT(0 != block);
1907 return FLAC__metadata_iterator_delete_block(iterator, false) && FLAC__metadata_iterator_insert_block_after(iterator, block);
1910 FLAC_API FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__Metadata_Iterator *iterator, FLAC__bool replace_with_padding)
1912 FLAC__Metadata_Node *save;
1914 FLAC__ASSERT(0 != iterator);
1915 FLAC__ASSERT(0 != iterator->current);
1917 if(0 == iterator->current->prev) {
1918 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1922 save = iterator->current->prev;
1924 if(replace_with_padding) {
1925 FLAC__metadata_object_delete_data(iterator->current->data);
1926 iterator->current->data->type = FLAC__METADATA_TYPE_PADDING;
1929 chain_delete_node_(iterator->chain, iterator->current);
1932 iterator->current = save;
1936 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1938 FLAC__Metadata_Node *node;
1940 FLAC__ASSERT(0 != iterator);
1941 FLAC__ASSERT(0 != iterator->current);
1942 FLAC__ASSERT(0 != block);
1944 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1947 if(0 == iterator->current->prev) {
1948 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1952 if(0 == (node = node_new_()))
1956 iterator_insert_node_(iterator, node);
1957 iterator->current = node;
1961 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1963 FLAC__Metadata_Node *node;
1965 FLAC__ASSERT(0 != iterator);
1966 FLAC__ASSERT(0 != iterator->current);
1967 FLAC__ASSERT(0 != block);
1969 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1972 if(0 == (node = node_new_()))
1976 iterator_insert_node_after_(iterator, node);
1977 iterator->current = node;
1982 /****************************************************************************
1984 * Local function definitions
1986 ***************************************************************************/
1988 void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1994 for(i = 0; i < bytes; i++) {
1995 *(--b) = (FLAC__byte)(val & 0xff);
2000 void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
2004 for(i = 0; i < bytes; i++) {
2005 *(b++) = (FLAC__byte)(val & 0xff);
2010 void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes)
2016 for(i = 0; i < bytes; i++) {
2017 *(--b) = (FLAC__byte)(val & 0xff);
2022 FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes)
2024 FLAC__uint32 ret = 0;
2027 for(i = 0; i < bytes; i++)
2028 ret = (ret << 8) | (FLAC__uint32)(*b++);
2033 FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes)
2035 FLAC__uint32 ret = 0;
2040 for(i = 0; i < bytes; i++)
2041 ret = (ret << 8) | (FLAC__uint32)(*--b);
2046 FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes)
2048 FLAC__uint64 ret = 0;
2051 for(i = 0; i < bytes; i++)
2052 ret = (ret << 8) | (FLAC__uint64)(*b++);
2057 FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator)
2059 FLAC__ASSERT(0 != iterator);
2060 FLAC__ASSERT(0 != iterator->file);
2062 if(!read_metadata_block_header_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, &iterator->is_last, &iterator->type, &iterator->length)) {
2063 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2070 FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block)
2072 FLAC__ASSERT(0 != iterator);
2073 FLAC__ASSERT(0 != iterator->file);
2075 iterator->status = read_metadata_block_data_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, block);
2077 return (iterator->status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK);
2080 FLAC__bool read_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__bool *is_last, FLAC__MetadataType *type, unsigned *length)
2082 FLAC__byte raw_header[FLAC__STREAM_METADATA_HEADER_LENGTH];
2084 if(read_cb(raw_header, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2087 *is_last = raw_header[0] & 0x80? true : false;
2088 *type = (FLAC__MetadataType)(raw_header[0] & 0x7f);
2089 *length = unpack_uint32_(raw_header + 1, 3);
2091 /* Note that we don't check:
2092 * if(iterator->type >= FLAC__METADATA_TYPE_UNDEFINED)
2093 * we just will read in an opaque block
2099 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata *block)
2101 switch(block->type) {
2102 case FLAC__METADATA_TYPE_STREAMINFO:
2103 return read_metadata_block_data_streaminfo_cb_(handle, read_cb, &block->data.stream_info);
2104 case FLAC__METADATA_TYPE_PADDING:
2105 return read_metadata_block_data_padding_cb_(handle, seek_cb, &block->data.padding, block->length);
2106 case FLAC__METADATA_TYPE_APPLICATION:
2107 return read_metadata_block_data_application_cb_(handle, read_cb, &block->data.application, block->length);
2108 case FLAC__METADATA_TYPE_SEEKTABLE:
2109 return read_metadata_block_data_seektable_cb_(handle, read_cb, &block->data.seek_table, block->length);
2110 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2111 return read_metadata_block_data_vorbis_comment_cb_(handle, read_cb, &block->data.vorbis_comment);
2112 case FLAC__METADATA_TYPE_CUESHEET:
2113 return read_metadata_block_data_cuesheet_cb_(handle, read_cb, &block->data.cue_sheet);
2114 case FLAC__METADATA_TYPE_PICTURE:
2115 return read_metadata_block_data_picture_cb_(handle, read_cb, &block->data.picture);
2117 return read_metadata_block_data_unknown_cb_(handle, read_cb, &block->data.unknown, block->length);
2121 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block)
2123 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH], *b;
2125 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2126 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2130 /* we are using hardcoded numbers for simplicity but we should
2131 * probably eventually write a bit-level unpacker and use the
2132 * _STREAMINFO_ constants.
2134 block->min_blocksize = unpack_uint32_(b, 2); b += 2;
2135 block->max_blocksize = unpack_uint32_(b, 2); b += 2;
2136 block->min_framesize = unpack_uint32_(b, 3); b += 3;
2137 block->max_framesize = unpack_uint32_(b, 3); b += 3;
2138 block->sample_rate = (unpack_uint32_(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4);
2139 block->channels = (unsigned)((b[2] & 0x0e) >> 1) + 1;
2140 block->bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 4) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1;
2141 block->total_samples = (((FLAC__uint64)(b[3] & 0x0f)) << 32) | unpack_uint64_(b+4, 4);
2142 memcpy(block->md5sum, b+8, 16);
2144 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2147 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_Padding *block, unsigned block_length)
2149 (void)block; /* nothing to do; we don't care about reading the padding bytes */
2151 if(0 != seek_cb(handle, block_length, SEEK_CUR))
2152 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2154 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2157 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Application *block, unsigned block_length)
2159 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2161 if(read_cb(block->id, 1, id_bytes, handle) != id_bytes)
2162 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2164 if(block_length < id_bytes)
2165 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2167 block_length -= id_bytes;
2169 if(block_length == 0) {
2173 if(0 == (block->data = (FLAC__byte*)malloc(block_length)))
2174 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2176 if(read_cb(block->data, 1, block_length, handle) != block_length)
2177 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2180 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2183 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_SeekTable *block, unsigned block_length)
2186 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2188 FLAC__ASSERT(block_length % FLAC__STREAM_METADATA_SEEKPOINT_LENGTH == 0);
2190 block->num_points = block_length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
2192 if(block->num_points == 0)
2194 else if(0 == (block->points = (FLAC__StreamMetadata_SeekPoint*)safe_malloc_mul_2op_(block->num_points, /*times*/sizeof(FLAC__StreamMetadata_SeekPoint))))
2195 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2197 for(i = 0; i < block->num_points; i++) {
2198 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2199 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2200 /* some MAGIC NUMBERs here */
2201 block->points[i].sample_number = unpack_uint64_(buffer, 8);
2202 block->points[i].stream_offset = unpack_uint64_(buffer+8, 8);
2203 block->points[i].frame_samples = unpack_uint32_(buffer+16, 2);
2206 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2209 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment_Entry *entry)
2211 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2212 FLAC__byte buffer[4]; /* magic number is asserted below */
2214 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8 == sizeof(buffer));
2216 if(read_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2217 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2218 entry->length = unpack_uint32_little_endian_(buffer, entry_length_len);
2220 if(0 != entry->entry)
2223 if(entry->length == 0) {
2227 if(0 == (entry->entry = (FLAC__byte*)safe_malloc_add_2op_(entry->length, /*+*/1)))
2228 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2230 if(read_cb(entry->entry, 1, entry->length, handle) != entry->length)
2231 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2233 entry->entry[entry->length] = '\0';
2236 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2239 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment *block)
2242 FLAC__Metadata_SimpleIteratorStatus status;
2243 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2244 FLAC__byte buffer[4]; /* magic number is asserted below */
2246 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8 == sizeof(buffer));
2248 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, &(block->vendor_string))))
2251 if(read_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2252 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2253 block->num_comments = unpack_uint32_little_endian_(buffer, num_comments_len);
2255 if(block->num_comments == 0) {
2256 block->comments = 0;
2258 else if(0 == (block->comments = (FLAC__StreamMetadata_VorbisComment_Entry*)calloc(block->num_comments, sizeof(FLAC__StreamMetadata_VorbisComment_Entry))))
2259 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2261 for(i = 0; i < block->num_comments; i++) {
2262 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, block->comments + i)))
2266 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2269 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track)
2272 FLAC__byte buffer[32]; /* asserted below that this is big enough */
2274 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2275 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2276 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);
2278 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2279 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2280 if(read_cb(buffer, 1, len, handle) != len)
2281 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2282 track->offset = unpack_uint64_(buffer, len);
2284 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2285 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2286 if(read_cb(buffer, 1, len, handle) != len)
2287 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2288 track->number = (FLAC__byte)unpack_uint32_(buffer, len);
2290 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2291 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2292 if(read_cb(track->isrc, 1, len, handle) != len)
2293 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2295 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);
2296 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2297 if(read_cb(buffer, 1, len, handle) != len)
2298 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2299 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN == 1);
2300 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN == 1);
2301 track->type = buffer[0] >> 7;
2302 track->pre_emphasis = (buffer[0] >> 6) & 1;
2304 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2305 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2306 if(read_cb(buffer, 1, len, handle) != len)
2307 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2308 track->num_indices = (FLAC__byte)unpack_uint32_(buffer, len);
2310 if(track->num_indices == 0) {
2313 else if(0 == (track->indices = (FLAC__StreamMetadata_CueSheet_Index*)calloc(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index))))
2314 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2316 for(i = 0; i < track->num_indices; i++) {
2317 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2318 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2319 if(read_cb(buffer, 1, len, handle) != len)
2320 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2321 track->indices[i].offset = unpack_uint64_(buffer, len);
2323 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2324 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2325 if(read_cb(buffer, 1, len, handle) != len)
2326 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2327 track->indices[i].number = (FLAC__byte)unpack_uint32_(buffer, len);
2329 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2330 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2331 if(read_cb(buffer, 1, len, handle) != len)
2332 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2335 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2338 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block)
2341 FLAC__Metadata_SimpleIteratorStatus status;
2342 FLAC__byte buffer[1024]; /* MSVC needs a constant expression so we put a magic number and assert */
2344 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN)/8 <= sizeof(buffer));
2345 FLAC__ASSERT(sizeof(FLAC__uint64) <= sizeof(buffer));
2347 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2348 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2349 if(read_cb(block->media_catalog_number, 1, len, handle) != len)
2350 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2352 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2353 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2354 if(read_cb(buffer, 1, len, handle) != len)
2355 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2356 block->lead_in = unpack_uint64_(buffer, len);
2358 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2359 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2360 if(read_cb(buffer, 1, len, handle) != len)
2361 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2362 block->is_cd = buffer[0]&0x80? true : false;
2364 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2365 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2366 if(read_cb(buffer, 1, len, handle) != len)
2367 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2368 block->num_tracks = unpack_uint32_(buffer, len);
2370 if(block->num_tracks == 0) {
2373 else if(0 == (block->tracks = (FLAC__StreamMetadata_CueSheet_Track*)calloc(block->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track))))
2374 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2376 for(i = 0; i < block->num_tracks; i++) {
2377 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_cuesheet_track_cb_(handle, read_cb, block->tracks + i)))
2381 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2384 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)
2386 FLAC__byte buffer[sizeof(FLAC__uint32)];
2388 FLAC__ASSERT(0 != data);
2389 FLAC__ASSERT(length_len%8 == 0);
2391 length_len /= 8; /* convert to bytes */
2393 FLAC__ASSERT(sizeof(buffer) >= length_len);
2395 if(read_cb(buffer, 1, length_len, handle) != length_len)
2396 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2397 *length = unpack_uint32_(buffer, length_len);
2402 if(0 == (*data = (FLAC__byte*)safe_malloc_add_2op_(*length, /*+*/1)))
2403 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2406 if(read_cb(*data, 1, *length, handle) != *length)
2407 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2410 (*data)[*length] = '\0';
2412 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2415 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block)
2417 FLAC__Metadata_SimpleIteratorStatus status;
2418 FLAC__byte buffer[4]; /* asserted below that this is big enough */
2421 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2422 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2423 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2424 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2425 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2427 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_TYPE_LEN % 8 == 0);
2428 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN / 8;
2429 if(read_cb(buffer, 1, len, handle) != len)
2430 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2431 block->type = (FLAC__StreamMetadata_Picture_Type)unpack_uint32_(buffer, len);
2433 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)
2436 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)
2439 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN % 8 == 0);
2440 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN / 8;
2441 if(read_cb(buffer, 1, len, handle) != len)
2442 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2443 block->width = unpack_uint32_(buffer, len);
2445 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN % 8 == 0);
2446 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN / 8;
2447 if(read_cb(buffer, 1, len, handle) != len)
2448 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2449 block->height = unpack_uint32_(buffer, len);
2451 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN % 8 == 0);
2452 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN / 8;
2453 if(read_cb(buffer, 1, len, handle) != len)
2454 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2455 block->depth = unpack_uint32_(buffer, len);
2457 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_COLORS_LEN % 8 == 0);
2458 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN / 8;
2459 if(read_cb(buffer, 1, len, handle) != len)
2460 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2461 block->colors = unpack_uint32_(buffer, len);
2463 /* for convenience we use read_metadata_block_data_picture_cstring_cb_() even though it adds an extra terminating NUL we don't use */
2464 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)
2467 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2470 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2472 if(block_length == 0) {
2476 if(0 == (block->data = (FLAC__byte*)malloc(block_length)))
2477 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2479 if(read_cb(block->data, 1, block_length, handle) != block_length)
2480 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2483 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2486 FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2488 FLAC__ASSERT(0 != file);
2489 FLAC__ASSERT(0 != status);
2491 if(!write_metadata_block_header_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2492 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2499 FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2501 FLAC__ASSERT(0 != file);
2502 FLAC__ASSERT(0 != status);
2504 if (write_metadata_block_data_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2505 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2509 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2514 FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2516 FLAC__byte buffer[FLAC__STREAM_METADATA_HEADER_LENGTH];
2518 FLAC__ASSERT(block->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
2520 buffer[0] = (block->is_last? 0x80 : 0) | (FLAC__byte)block->type;
2521 pack_uint32_(block->length, buffer + 1, 3);
2523 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2529 FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2531 FLAC__ASSERT(0 != block);
2533 switch(block->type) {
2534 case FLAC__METADATA_TYPE_STREAMINFO:
2535 return write_metadata_block_data_streaminfo_cb_(handle, write_cb, &block->data.stream_info);
2536 case FLAC__METADATA_TYPE_PADDING:
2537 return write_metadata_block_data_padding_cb_(handle, write_cb, &block->data.padding, block->length);
2538 case FLAC__METADATA_TYPE_APPLICATION:
2539 return write_metadata_block_data_application_cb_(handle, write_cb, &block->data.application, block->length);
2540 case FLAC__METADATA_TYPE_SEEKTABLE:
2541 return write_metadata_block_data_seektable_cb_(handle, write_cb, &block->data.seek_table);
2542 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2543 return write_metadata_block_data_vorbis_comment_cb_(handle, write_cb, &block->data.vorbis_comment);
2544 case FLAC__METADATA_TYPE_CUESHEET:
2545 return write_metadata_block_data_cuesheet_cb_(handle, write_cb, &block->data.cue_sheet);
2546 case FLAC__METADATA_TYPE_PICTURE:
2547 return write_metadata_block_data_picture_cb_(handle, write_cb, &block->data.picture);
2549 return write_metadata_block_data_unknown_cb_(handle, write_cb, &block->data.unknown, block->length);
2553 FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block)
2555 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH];
2556 const unsigned channels1 = block->channels - 1;
2557 const unsigned bps1 = block->bits_per_sample - 1;
2559 /* we are using hardcoded numbers for simplicity but we should
2560 * probably eventually write a bit-level packer and use the
2561 * _STREAMINFO_ constants.
2563 pack_uint32_(block->min_blocksize, buffer, 2);
2564 pack_uint32_(block->max_blocksize, buffer+2, 2);
2565 pack_uint32_(block->min_framesize, buffer+4, 3);
2566 pack_uint32_(block->max_framesize, buffer+7, 3);
2567 buffer[10] = (block->sample_rate >> 12) & 0xff;
2568 buffer[11] = (block->sample_rate >> 4) & 0xff;
2569 buffer[12] = ((block->sample_rate & 0x0f) << 4) | (channels1 << 1) | (bps1 >> 4);
2570 buffer[13] = (FLAC__byte)(((bps1 & 0x0f) << 4) | ((block->total_samples >> 32) & 0x0f));
2571 pack_uint32_((FLAC__uint32)block->total_samples, buffer+14, 4);
2572 memcpy(buffer+18, block->md5sum, 16);
2574 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2580 FLAC__bool write_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Padding *block, unsigned block_length)
2582 unsigned i, n = block_length;
2583 FLAC__byte buffer[1024];
2587 memset(buffer, 0, 1024);
2589 for(i = 0; i < n/1024; i++)
2590 if(write_cb(buffer, 1, 1024, handle) != 1024)
2595 if(write_cb(buffer, 1, n, handle) != n)
2601 FLAC__bool write_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Application *block, unsigned block_length)
2603 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2605 if(write_cb(block->id, 1, id_bytes, handle) != id_bytes)
2608 block_length -= id_bytes;
2610 if(write_cb(block->data, 1, block_length, handle) != block_length)
2616 FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block)
2619 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2621 for(i = 0; i < block->num_points; i++) {
2622 /* some MAGIC NUMBERs here */
2623 pack_uint64_(block->points[i].sample_number, buffer, 8);
2624 pack_uint64_(block->points[i].stream_offset, buffer+8, 8);
2625 pack_uint32_(block->points[i].frame_samples, buffer+16, 2);
2626 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2633 FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block)
2636 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2637 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2638 FLAC__byte buffer[4]; /* magic number is asserted below */
2640 FLAC__ASSERT(max(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN, FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8 == sizeof(buffer));
2642 pack_uint32_little_endian_(block->vendor_string.length, buffer, entry_length_len);
2643 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2645 if(write_cb(block->vendor_string.entry, 1, block->vendor_string.length, handle) != block->vendor_string.length)
2648 pack_uint32_little_endian_(block->num_comments, buffer, num_comments_len);
2649 if(write_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2652 for(i = 0; i < block->num_comments; i++) {
2653 pack_uint32_little_endian_(block->comments[i].length, buffer, entry_length_len);
2654 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2656 if(write_cb(block->comments[i].entry, 1, block->comments[i].length, handle) != block->comments[i].length)
2663 FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block)
2666 FLAC__byte buffer[1024]; /* asserted below that this is big enough */
2668 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2669 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN/8);
2670 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);
2671 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2673 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2674 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2675 if(write_cb(block->media_catalog_number, 1, len, handle) != len)
2678 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2679 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2680 pack_uint64_(block->lead_in, buffer, len);
2681 if(write_cb(buffer, 1, len, handle) != len)
2684 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2685 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2686 memset(buffer, 0, len);
2689 if(write_cb(buffer, 1, len, handle) != len)
2692 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2693 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2694 pack_uint32_(block->num_tracks, buffer, len);
2695 if(write_cb(buffer, 1, len, handle) != len)
2698 for(i = 0; i < block->num_tracks; i++) {
2699 FLAC__StreamMetadata_CueSheet_Track *track = block->tracks + i;
2701 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2702 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2703 pack_uint64_(track->offset, buffer, len);
2704 if(write_cb(buffer, 1, len, handle) != len)
2707 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2708 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2709 pack_uint32_(track->number, buffer, len);
2710 if(write_cb(buffer, 1, len, handle) != len)
2713 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2714 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2715 if(write_cb(track->isrc, 1, len, handle) != len)
2718 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);
2719 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2720 memset(buffer, 0, len);
2721 buffer[0] = (track->type << 7) | (track->pre_emphasis << 6);
2722 if(write_cb(buffer, 1, len, handle) != len)
2725 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2726 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2727 pack_uint32_(track->num_indices, buffer, len);
2728 if(write_cb(buffer, 1, len, handle) != len)
2731 for(j = 0; j < track->num_indices; j++) {
2732 FLAC__StreamMetadata_CueSheet_Index *index = track->indices + j;
2734 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2735 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2736 pack_uint64_(index->offset, buffer, len);
2737 if(write_cb(buffer, 1, len, handle) != len)
2740 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2741 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2742 pack_uint32_(index->number, buffer, len);
2743 if(write_cb(buffer, 1, len, handle) != len)
2746 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2747 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2748 memset(buffer, 0, len);
2749 if(write_cb(buffer, 1, len, handle) != len)
2757 FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block)
2761 FLAC__byte buffer[4]; /* magic number is asserted below */
2763 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_TYPE_LEN%8);
2764 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN%8);
2765 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN%8);
2766 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN%8);
2767 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN%8);
2768 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN%8);
2769 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_COLORS_LEN%8);
2770 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN%8);
2771 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2772 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8);
2773 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8);
2774 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2775 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2776 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2777 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2778 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8);
2780 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8;
2781 pack_uint32_(block->type, buffer, len);
2782 if(write_cb(buffer, 1, len, handle) != len)
2785 len = FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8;
2786 slen = strlen(block->mime_type);
2787 pack_uint32_(slen, buffer, len);
2788 if(write_cb(buffer, 1, len, handle) != len)
2790 if(write_cb(block->mime_type, 1, slen, handle) != slen)
2793 len = FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8;
2794 slen = strlen((const char *)block->description);
2795 pack_uint32_(slen, buffer, len);
2796 if(write_cb(buffer, 1, len, handle) != len)
2798 if(write_cb(block->description, 1, slen, handle) != slen)
2801 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8;
2802 pack_uint32_(block->width, buffer, len);
2803 if(write_cb(buffer, 1, len, handle) != len)
2806 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8;
2807 pack_uint32_(block->height, buffer, len);
2808 if(write_cb(buffer, 1, len, handle) != len)
2811 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8;
2812 pack_uint32_(block->depth, buffer, len);
2813 if(write_cb(buffer, 1, len, handle) != len)
2816 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8;
2817 pack_uint32_(block->colors, buffer, len);
2818 if(write_cb(buffer, 1, len, handle) != len)
2821 len = FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8;
2822 pack_uint32_(block->data_length, buffer, len);
2823 if(write_cb(buffer, 1, len, handle) != len)
2825 if(write_cb(block->data, 1, block->data_length, handle) != block->data_length)
2831 FLAC__bool write_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2833 if(write_cb(block->data, 1, block_length, handle) != block_length)
2839 FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block)
2841 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2842 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2846 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2849 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2852 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2853 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2857 return read_metadata_block_header_(iterator);
2860 FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last)
2862 FLAC__StreamMetadata *padding;
2864 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2865 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2869 block->is_last = false;
2871 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2874 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2877 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
2878 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2880 padding->is_last = padding_is_last;
2881 padding->length = padding_length;
2883 if(!write_metadata_block_header_(iterator->file, &iterator->status, padding)) {
2884 FLAC__metadata_object_delete(padding);
2888 if(!write_metadata_block_data_(iterator->file, &iterator->status, padding)) {
2889 FLAC__metadata_object_delete(padding);
2893 FLAC__metadata_object_delete(padding);
2895 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2896 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2900 return read_metadata_block_header_(iterator);
2903 FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append)
2907 int fixup_is_last_code = 0; /* 0 => no need to change any is_last flags */
2908 off_t fixup_is_last_flag_offset = -1;
2910 FLAC__ASSERT(0 != block || append == false);
2912 if(iterator->is_last) {
2914 fixup_is_last_code = 1; /* 1 => clear the is_last flag at the following offset */
2915 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2917 else if(0 == block) {
2918 simple_iterator_push_(iterator);
2919 if(!FLAC__metadata_simple_iterator_prev(iterator)) {
2920 (void)simple_iterator_pop_(iterator);
2923 fixup_is_last_code = -1; /* -1 => set the is_last the flag at the following offset */
2924 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2925 if(!simple_iterator_pop_(iterator))
2930 if(!simple_iterator_copy_file_prefix_(iterator, &tempfile, &tempfilename, append))
2934 if(!write_metadata_block_header_(tempfile, &iterator->status, block)) {
2935 cleanup_tempfile_(&tempfile, &tempfilename);
2939 if(!write_metadata_block_data_(tempfile, &iterator->status, block)) {
2940 cleanup_tempfile_(&tempfile, &tempfilename);
2945 if(!simple_iterator_copy_file_postfix_(iterator, &tempfile, &tempfilename, fixup_is_last_code, fixup_is_last_flag_offset, block==0))
2949 return FLAC__metadata_simple_iterator_next(iterator);
2954 void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator)
2956 FLAC__ASSERT(iterator->depth+1 < SIMPLE_ITERATOR_MAX_PUSH_DEPTH);
2957 iterator->offset[iterator->depth+1] = iterator->offset[iterator->depth];
2961 FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator)
2963 FLAC__ASSERT(iterator->depth > 0);
2965 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2966 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2970 return read_metadata_block_header_(iterator);
2977 * 3: not a FLAC file
2979 unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb)
2981 FLAC__byte buffer[4];
2985 FLAC__ASSERT(FLAC__STREAM_SYNC_LENGTH == sizeof(buffer));
2987 /* skip any id3v2 tag */
2989 n = read_cb(buffer, 1, 4, handle);
2994 else if(0 == memcmp(buffer, "ID3", 3)) {
2995 unsigned tag_length = 0;
2997 /* skip to the tag length */
2998 if(seek_cb(handle, 2, SEEK_CUR) < 0)
3001 /* read the length */
3002 for(i = 0; i < 4; i++) {
3003 if(read_cb(buffer, 1, 1, handle) < 1 || buffer[0] & 0x80)
3006 tag_length |= (buffer[0] & 0x7f);
3009 /* skip the rest of the tag */
3010 if(seek_cb(handle, tag_length, SEEK_CUR) < 0)
3013 /* read the stream sync code */
3015 n = read_cb(buffer, 1, 4, handle);
3022 /* check for the fLaC signature */
3023 if(0 == memcmp(FLAC__STREAM_SYNC_STRING, buffer, FLAC__STREAM_SYNC_LENGTH))
3029 unsigned seek_to_first_metadata_block_(FILE *f)
3031 return seek_to_first_metadata_block_cb_((FLAC__IOHandle)f, (FLAC__IOCallback_Read)fread, fseek_wrapper_);
3034 FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append)
3036 const off_t offset_end = append? iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length : iterator->offset[iterator->depth];
3038 if(0 != fseeko(iterator->file, 0, SEEK_SET)) {
3039 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3042 if(!open_tempfile_(iterator->filename, iterator->tempfile_path_prefix, tempfile, tempfilename, &iterator->status)) {
3043 cleanup_tempfile_(tempfile, tempfilename);
3046 if(!copy_n_bytes_from_file_(iterator->file, *tempfile, offset_end, &iterator->status)) {
3047 cleanup_tempfile_(tempfile, tempfilename);
3054 FLAC__bool simple_iterator_copy_file_postfix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, int fixup_is_last_code, off_t fixup_is_last_flag_offset, FLAC__bool backup)
3056 off_t save_offset = iterator->offset[iterator->depth];
3057 FLAC__ASSERT(0 != *tempfile);
3059 if(0 != fseeko(iterator->file, save_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length, SEEK_SET)) {
3060 cleanup_tempfile_(tempfile, tempfilename);
3061 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3064 if(!copy_remaining_bytes_from_file_(iterator->file, *tempfile, &iterator->status)) {
3065 cleanup_tempfile_(tempfile, tempfilename);
3069 if(fixup_is_last_code != 0) {
3071 * if code == 1, it means a block was appended to the end so
3072 * we have to clear the is_last flag of the previous block
3073 * if code == -1, it means the last block was deleted so
3074 * we have to set the is_last flag of the previous block
3076 /* MAGIC NUMBERs here; we know the is_last flag is the high bit of the byte at this location */
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(fread(&x, 1, 1, *tempfile) != 1) {
3084 cleanup_tempfile_(tempfile, tempfilename);
3085 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3088 if(fixup_is_last_code > 0) {
3089 FLAC__ASSERT(x & 0x80);
3093 FLAC__ASSERT(!(x & 0x80));
3096 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3097 cleanup_tempfile_(tempfile, tempfilename);
3098 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3101 if(local__fwrite(&x, 1, 1, *tempfile) != 1) {
3102 cleanup_tempfile_(tempfile, tempfilename);
3103 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3108 (void)fclose(iterator->file);
3110 if(!transport_tempfile_(iterator->filename, tempfile, tempfilename, &iterator->status))
3113 if(iterator->has_stats)
3114 set_file_stats_(iterator->filename, &iterator->stats);
3116 if(!simple_iterator_prime_input_(iterator, !iterator->is_writable))
3119 while(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length < save_offset)
3120 if(!FLAC__metadata_simple_iterator_next(iterator))
3125 /* move the iterator to it's original block faster by faking a push, then doing a pop_ */
3126 FLAC__ASSERT(iterator->depth == 0);
3127 iterator->offset[0] = save_offset;
3129 return simple_iterator_pop_(iterator);
3133 FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status)
3135 FLAC__byte buffer[8192];
3138 FLAC__ASSERT(bytes >= 0);
3140 n = min(sizeof(buffer), (size_t)bytes);
3141 if(fread(buffer, 1, n, file) != n) {
3142 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3145 if(local__fwrite(buffer, 1, n, tempfile) != n) {
3146 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3155 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, off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status)
3157 FLAC__byte buffer[8192];
3160 FLAC__ASSERT(bytes >= 0);
3162 n = min(sizeof(buffer), (size_t)bytes);
3163 if(read_cb(buffer, 1, n, handle) != n) {
3164 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3167 if(temp_write_cb(buffer, 1, n, temp_handle) != n) {
3168 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3177 FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status)
3179 FLAC__byte buffer[8192];
3182 while(!feof(file)) {
3183 n = fread(buffer, 1, sizeof(buffer), file);
3184 if(n == 0 && !feof(file)) {
3185 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3188 if(n > 0 && local__fwrite(buffer, 1, n, tempfile) != n) {
3189 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3197 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)
3199 FLAC__byte buffer[8192];
3202 while(!eof_cb(handle)) {
3203 n = read_cb(buffer, 1, sizeof(buffer), handle);
3204 if(n == 0 && !eof_cb(handle)) {
3205 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3208 if(n > 0 && temp_write_cb(buffer, 1, n, temp_handle) != n) {
3209 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3217 FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3219 static const char *tempfile_suffix = ".metadata_edit";
3220 if(0 == tempfile_path_prefix) {
3221 if(0 == (*tempfilename = (char*)safe_malloc_add_3op_(strlen(filename), /*+*/strlen(tempfile_suffix), /*+*/1))) {
3222 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3225 strcpy(*tempfilename, filename);
3226 strcat(*tempfilename, tempfile_suffix);
3229 const char *p = strrchr(filename, '/');
3235 if(0 == (*tempfilename = (char*)safe_malloc_add_4op_(strlen(tempfile_path_prefix), /*+*/strlen(p), /*+*/strlen(tempfile_suffix), /*+*/2))) {
3236 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3239 strcpy(*tempfilename, tempfile_path_prefix);
3240 strcat(*tempfilename, "/");
3241 strcat(*tempfilename, p);
3242 strcat(*tempfilename, tempfile_suffix);
3245 if(0 == (*tempfile = fopen(*tempfilename, "w+b"))) {
3246 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
3253 FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3255 FLAC__ASSERT(0 != filename);
3256 FLAC__ASSERT(0 != tempfile);
3257 FLAC__ASSERT(0 != *tempfile);
3258 FLAC__ASSERT(0 != tempfilename);
3259 FLAC__ASSERT(0 != *tempfilename);
3260 FLAC__ASSERT(0 != status);
3262 (void)fclose(*tempfile);
3265 #if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__ || defined __EMX__
3266 /* on some flavors of windows, rename() will fail if the destination already exists */
3267 if(unlink(filename) < 0) {
3268 cleanup_tempfile_(tempfile, tempfilename);
3269 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR;
3274 /*@@@ to fully support the tempfile_path_prefix we need to update this piece to actually copy across filesystems instead of just rename(): */
3275 if(0 != rename(*tempfilename, filename)) {
3276 cleanup_tempfile_(tempfile, tempfilename);
3277 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR;
3281 cleanup_tempfile_(tempfile, tempfilename);
3286 void cleanup_tempfile_(FILE **tempfile, char **tempfilename)
3288 if(0 != *tempfile) {
3289 (void)fclose(*tempfile);
3293 if(0 != *tempfilename) {
3294 (void)unlink(*tempfilename);
3295 free(*tempfilename);
3300 FLAC__bool get_file_stats_(const char *filename, struct stat *stats)
3302 FLAC__ASSERT(0 != filename);
3303 FLAC__ASSERT(0 != stats);
3304 return (0 == stat(filename, stats));
3307 void set_file_stats_(const char *filename, struct stat *stats)
3309 struct utimbuf srctime;
3311 FLAC__ASSERT(0 != filename);
3312 FLAC__ASSERT(0 != stats);
3314 srctime.actime = stats->st_atime;
3315 srctime.modtime = stats->st_mtime;
3316 (void)chmod(filename, stats->st_mode);
3317 (void)utime(filename, &srctime);
3318 #if !defined _MSC_VER && !defined __BORLANDC__ && !defined __MINGW32__ && !defined __EMX__
3319 (void)chown(filename, stats->st_uid, -1);
3320 (void)chown(filename, -1, stats->st_gid);
3324 int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence)
3326 return fseeko((FILE*)handle, (off_t)offset, whence);
3329 FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle)
3331 return ftello((FILE*)handle);
3334 FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status)
3337 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK:
3338 return FLAC__METADATA_CHAIN_STATUS_OK;
3339 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT:
3340 return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT;
3341 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE:
3342 return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
3343 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE:
3344 return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
3345 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE:
3346 return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE;
3347 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA:
3348 return FLAC__METADATA_CHAIN_STATUS_BAD_METADATA;
3349 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR:
3350 return FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
3351 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR:
3352 return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
3353 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR:
3354 return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
3355 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR:
3356 return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR;
3357 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR:
3358 return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR;
3359 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR:
3360 return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
3361 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR:
3363 return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;