1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2001-2009 Josh Coalson
3 * Copyright (C) 2011-2016 Xiph.Org Foundation
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * - Neither the name of the Xiph.org Foundation nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43 #include <sys/stat.h> /* for stat(), maybe chmod() */
45 #include "private/metadata.h"
47 #include "FLAC/assert.h"
48 #include "FLAC/stream_decoder.h"
49 #include "share/alloc.h"
50 #include "share/compat.h"
51 #include "share/macros.h"
52 #include "share/safe_str.h"
53 #include "private/macros.h"
54 #include "private/memory.h"
56 /* Alias the first (in share/alloc.h) to the second (in src/libFLAC/memory.c). */
57 #define safe_malloc_mul_2op_ safe_malloc_mul_2op_p
59 /****************************************************************************
61 * Local function declarations
63 ***************************************************************************/
65 static void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
66 static void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
67 static void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes);
68 static FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes);
69 static FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes);
70 static FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes);
72 static FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator);
73 static FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block);
74 static FLAC__bool read_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__bool *is_last, FLAC__MetadataType *type, unsigned *length);
75 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata *block);
76 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block);
77 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_Padding *block, unsigned block_length);
78 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Application *block, unsigned block_length);
79 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_SeekTable *block, unsigned block_length);
80 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment_Entry *entry, unsigned max_length);
81 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_VorbisComment *block, unsigned block_length);
82 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track);
83 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block);
84 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block);
85 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Unknown *block, unsigned block_length);
87 static FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
88 static FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
89 static FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
90 static FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
91 static FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block);
92 static FLAC__bool write_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Padding *block, unsigned block_length);
93 static FLAC__bool write_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Application *block, unsigned block_length);
94 static FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block);
95 static FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block);
96 static FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block);
97 static FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block);
98 static FLAC__bool write_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Unknown *block, unsigned block_length);
100 static FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block);
101 static FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last);
102 static FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append);
104 static void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator);
105 static FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator);
107 static unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb);
108 static unsigned seek_to_first_metadata_block_(FILE *f);
110 static FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append);
111 static FLAC__bool simple_iterator_copy_file_postfix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, int fixup_is_last_code, FLAC__off_t fixup_is_last_flag_offset, FLAC__bool backup);
113 static FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status);
114 static FLAC__bool copy_n_bytes_from_file_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOHandle temp_handle, FLAC__IOCallback_Write temp_write_cb, FLAC__off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status);
115 static FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status);
116 static FLAC__bool copy_remaining_bytes_from_file_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Eof eof_cb, FLAC__IOHandle temp_handle, FLAC__IOCallback_Write temp_write_cb, FLAC__Metadata_SimpleIteratorStatus *status);
118 static FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
119 static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
120 static void cleanup_tempfile_(FILE **tempfile, char **tempfilename);
122 static FLAC__bool get_file_stats_(const char *filename, struct flac_stat_s *stats);
123 static void set_file_stats_(const char *filename, struct flac_stat_s *stats);
125 static int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence);
126 static FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle);
128 static FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status);
131 #ifdef FLAC__VALGRIND_TESTING
132 static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
134 size_t ret = fwrite(ptr, size, nmemb, stream);
140 #define local__fwrite fwrite
143 /****************************************************************************
145 * Level 0 implementation
147 ***************************************************************************/
149 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
150 static void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
151 static void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
154 FLAC__bool got_error;
155 FLAC__StreamMetadata *object;
156 } level0_client_data;
158 static FLAC__StreamMetadata *get_one_metadata_block_(const char *filename, FLAC__MetadataType type)
160 level0_client_data cd;
161 FLAC__StreamDecoder *decoder;
163 FLAC__ASSERT(0 != filename);
165 cd.got_error = false;
168 decoder = FLAC__stream_decoder_new();
173 FLAC__stream_decoder_set_md5_checking(decoder, false);
174 FLAC__stream_decoder_set_metadata_ignore_all(decoder);
175 FLAC__stream_decoder_set_metadata_respond(decoder, type);
177 if(FLAC__stream_decoder_init_file(decoder, filename, write_callback_, metadata_callback_, error_callback_, &cd) != FLAC__STREAM_DECODER_INIT_STATUS_OK || cd.got_error) {
178 (void)FLAC__stream_decoder_finish(decoder);
179 FLAC__stream_decoder_delete(decoder);
183 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder) || cd.got_error) {
184 (void)FLAC__stream_decoder_finish(decoder);
185 FLAC__stream_decoder_delete(decoder);
187 FLAC__metadata_object_delete(cd.object);
191 (void)FLAC__stream_decoder_finish(decoder);
192 FLAC__stream_decoder_delete(decoder);
197 FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo)
199 FLAC__StreamMetadata *object;
201 FLAC__ASSERT(0 != filename);
202 FLAC__ASSERT(0 != streaminfo);
204 object = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_STREAMINFO);
207 /* can just copy the contents since STREAMINFO has no internal structure */
208 *streaminfo = *object;
209 FLAC__metadata_object_delete(object);
217 FLAC_API FLAC__bool FLAC__metadata_get_tags(const char *filename, FLAC__StreamMetadata **tags)
219 FLAC__ASSERT(0 != filename);
220 FLAC__ASSERT(0 != tags);
222 *tags = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_VORBIS_COMMENT);
227 FLAC_API FLAC__bool FLAC__metadata_get_cuesheet(const char *filename, FLAC__StreamMetadata **cuesheet)
229 FLAC__ASSERT(0 != filename);
230 FLAC__ASSERT(0 != cuesheet);
232 *cuesheet = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_CUESHEET);
234 return 0 != *cuesheet;
237 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
239 (void)decoder, (void)frame, (void)buffer, (void)client_data;
241 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
244 void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
246 level0_client_data *cd = (level0_client_data *)client_data;
250 * we assume we only get here when the one metadata block we were
251 * looking for was passed to us
253 if(!cd->got_error && 0 == cd->object) {
254 if(0 == (cd->object = FLAC__metadata_object_clone(metadata)))
255 cd->got_error = true;
259 void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
261 level0_client_data *cd = (level0_client_data *)client_data;
264 if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
265 cd->got_error = true;
268 FLAC_API FLAC__bool FLAC__metadata_get_picture(const char *filename, FLAC__StreamMetadata **picture, FLAC__StreamMetadata_Picture_Type type, const char *mime_type, const FLAC__byte *description, unsigned max_width, unsigned max_height, unsigned max_depth, unsigned max_colors)
270 FLAC__Metadata_SimpleIterator *it;
271 FLAC__uint64 max_area_seen = 0;
272 FLAC__uint64 max_depth_seen = 0;
274 FLAC__ASSERT(0 != filename);
275 FLAC__ASSERT(0 != picture);
279 it = FLAC__metadata_simple_iterator_new();
282 if(!FLAC__metadata_simple_iterator_init(it, filename, /*read_only=*/true, /*preserve_file_stats=*/true)) {
283 FLAC__metadata_simple_iterator_delete(it);
287 if(FLAC__metadata_simple_iterator_get_block_type(it) == FLAC__METADATA_TYPE_PICTURE) {
288 FLAC__StreamMetadata *obj = FLAC__metadata_simple_iterator_get_block(it);
289 FLAC__uint64 area = (FLAC__uint64)obj->data.picture.width * (FLAC__uint64)obj->data.picture.height;
290 /* check constraints */
292 (type == (FLAC__StreamMetadata_Picture_Type)(-1) || type == obj->data.picture.type) &&
293 (mime_type == 0 || !strcmp(mime_type, obj->data.picture.mime_type)) &&
294 (description == 0 || !strcmp((const char *)description, (const char *)obj->data.picture.description)) &&
295 obj->data.picture.width <= max_width &&
296 obj->data.picture.height <= max_height &&
297 obj->data.picture.depth <= max_depth &&
298 obj->data.picture.colors <= max_colors &&
299 (area > max_area_seen || (area == max_area_seen && obj->data.picture.depth > max_depth_seen))
302 FLAC__metadata_object_delete(*picture);
304 max_area_seen = area;
305 max_depth_seen = obj->data.picture.depth;
308 FLAC__metadata_object_delete(obj);
311 } while(FLAC__metadata_simple_iterator_next(it));
313 FLAC__metadata_simple_iterator_delete(it);
315 return (0 != *picture);
319 /****************************************************************************
321 * Level 1 implementation
323 ***************************************************************************/
325 #define SIMPLE_ITERATOR_MAX_PUSH_DEPTH (1+4)
326 /* 1 for initial offset, +4 for our own personal use */
328 struct FLAC__Metadata_SimpleIterator {
330 char *filename, *tempfile_path_prefix;
331 struct flac_stat_s stats;
332 FLAC__bool has_stats;
333 FLAC__bool is_writable;
334 FLAC__Metadata_SimpleIteratorStatus status;
335 FLAC__off_t offset[SIMPLE_ITERATOR_MAX_PUSH_DEPTH];
336 FLAC__off_t first_offset; /* this is the offset to the STREAMINFO block */
338 /* this is the metadata block header of the current block we are pointing to: */
340 FLAC__MetadataType type;
344 FLAC_API const char * const FLAC__Metadata_SimpleIteratorStatusString[] = {
345 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK",
346 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT",
347 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE",
348 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE",
349 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE",
350 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA",
351 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR",
352 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR",
353 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR",
354 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR",
355 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR",
356 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR",
357 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR"
361 FLAC_API FLAC__Metadata_SimpleIterator *FLAC__metadata_simple_iterator_new(void)
363 FLAC__Metadata_SimpleIterator *iterator = calloc(1, sizeof(FLAC__Metadata_SimpleIterator));
367 iterator->filename = 0;
368 iterator->tempfile_path_prefix = 0;
369 iterator->has_stats = false;
370 iterator->is_writable = false;
371 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
372 iterator->first_offset = iterator->offset[0] = -1;
379 static void simple_iterator_free_guts_(FLAC__Metadata_SimpleIterator *iterator)
381 FLAC__ASSERT(0 != iterator);
383 if(0 != iterator->file) {
384 fclose(iterator->file);
386 if(iterator->has_stats)
387 set_file_stats_(iterator->filename, &iterator->stats);
389 if(0 != iterator->filename) {
390 free(iterator->filename);
391 iterator->filename = 0;
393 if(0 != iterator->tempfile_path_prefix) {
394 free(iterator->tempfile_path_prefix);
395 iterator->tempfile_path_prefix = 0;
399 FLAC_API void FLAC__metadata_simple_iterator_delete(FLAC__Metadata_SimpleIterator *iterator)
401 FLAC__ASSERT(0 != iterator);
403 simple_iterator_free_guts_(iterator);
407 FLAC_API FLAC__Metadata_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__Metadata_SimpleIterator *iterator)
409 FLAC__Metadata_SimpleIteratorStatus status;
411 FLAC__ASSERT(0 != iterator);
413 status = iterator->status;
414 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
418 static FLAC__bool simple_iterator_prime_input_(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool read_only)
422 FLAC__ASSERT(0 != iterator);
424 if(read_only || 0 == (iterator->file = flac_fopen(iterator->filename, "r+b"))) {
425 iterator->is_writable = false;
426 if(read_only || errno == EACCES) {
427 if(0 == (iterator->file = flac_fopen(iterator->filename, "rb"))) {
428 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
433 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
438 iterator->is_writable = true;
441 ret = seek_to_first_metadata_block_(iterator->file);
445 iterator->first_offset = iterator->offset[iterator->depth] = ftello(iterator->file);
446 return read_metadata_block_header_(iterator);
448 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
451 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
454 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE;
463 @@@ If we decide to finish implementing this, put this comment back in metadata.h
465 * The 'tempfile_path_prefix' allows you to specify a directory where
466 * tempfiles should go. Remember that if your metadata edits cause the
467 * FLAC file to grow, the entire file will have to be rewritten. If
468 * 'tempfile_path_prefix' is NULL, the temp file will be written in the
469 * same directory as the original FLAC file. This makes replacing the
470 * original with the tempfile fast but requires extra space in the same
471 * partition for the tempfile. If space is a problem, you can pass a
472 * directory name belonging to a different partition in
473 * 'tempfile_path_prefix'. Note that you should use the forward slash
474 * '/' as the directory separator. A trailing slash is not needed; it
475 * will be added automatically.
477 FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats, const char *tempfile_path_prefix);
480 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool read_only, FLAC__bool preserve_file_stats)
482 const char *tempfile_path_prefix = 0; /*@@@ search for comments near 'flac_rename(...)' for what it will take to finish implementing this */
484 FLAC__ASSERT(0 != iterator);
485 FLAC__ASSERT(0 != filename);
487 simple_iterator_free_guts_(iterator);
489 if(!read_only && preserve_file_stats)
490 iterator->has_stats = get_file_stats_(filename, &iterator->stats);
492 if(0 == (iterator->filename = strdup(filename))) {
493 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
496 if(0 != tempfile_path_prefix && 0 == (iterator->tempfile_path_prefix = strdup(tempfile_path_prefix))) {
497 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
501 return simple_iterator_prime_input_(iterator, read_only);
504 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__Metadata_SimpleIterator *iterator)
506 FLAC__ASSERT(0 != iterator);
507 FLAC__ASSERT(0 != iterator->file);
509 return iterator->is_writable;
512 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__Metadata_SimpleIterator *iterator)
514 FLAC__ASSERT(0 != iterator);
515 FLAC__ASSERT(0 != iterator->file);
517 if(iterator->is_last)
520 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
521 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
525 iterator->offset[iterator->depth] = ftello(iterator->file);
527 return read_metadata_block_header_(iterator);
530 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__Metadata_SimpleIterator *iterator)
532 FLAC__off_t this_offset;
534 FLAC__ASSERT(0 != iterator);
535 FLAC__ASSERT(0 != iterator->file);
537 if(iterator->offset[iterator->depth] == iterator->first_offset)
540 if(0 != fseeko(iterator->file, iterator->first_offset, SEEK_SET)) {
541 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
544 this_offset = iterator->first_offset;
545 if(!read_metadata_block_header_(iterator))
548 /* we ignore any error from ftello() and catch it in fseeko() */
549 while(ftello(iterator->file) + (FLAC__off_t)iterator->length < iterator->offset[iterator->depth]) {
550 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
551 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
554 this_offset = ftello(iterator->file);
555 if(!read_metadata_block_header_(iterator))
559 iterator->offset[iterator->depth] = this_offset;
565 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_last(const FLAC__Metadata_SimpleIterator *iterator)
567 FLAC__ASSERT(0 != iterator);
568 FLAC__ASSERT(0 != iterator->file);
570 return iterator->is_last;
574 FLAC_API off_t FLAC__metadata_simple_iterator_get_block_offset(const FLAC__Metadata_SimpleIterator *iterator)
576 FLAC__ASSERT(0 != iterator);
577 FLAC__ASSERT(0 != iterator->file);
579 return iterator->offset[iterator->depth];
582 FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator)
584 FLAC__ASSERT(0 != iterator);
585 FLAC__ASSERT(0 != iterator->file);
587 return iterator->type;
591 FLAC_API unsigned FLAC__metadata_simple_iterator_get_block_length(const FLAC__Metadata_SimpleIterator *iterator)
593 FLAC__ASSERT(0 != iterator);
594 FLAC__ASSERT(0 != iterator->file);
596 return iterator->length;
600 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_get_application_id(FLAC__Metadata_SimpleIterator *iterator, FLAC__byte *id)
602 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
604 FLAC__ASSERT(0 != iterator);
605 FLAC__ASSERT(0 != iterator->file);
606 FLAC__ASSERT(0 != id);
608 if(iterator->type != FLAC__METADATA_TYPE_APPLICATION) {
609 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
613 if(fread(id, 1, id_bytes, iterator->file) != id_bytes) {
614 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
619 if(0 != fseeko(iterator->file, -((int)id_bytes), SEEK_CUR)) {
620 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
627 FLAC_API FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator)
629 FLAC__StreamMetadata *block = FLAC__metadata_object_new(iterator->type);
631 FLAC__ASSERT(0 != iterator);
632 FLAC__ASSERT(0 != iterator->file);
635 block->is_last = iterator->is_last;
636 block->length = iterator->length;
638 if(!read_metadata_block_data_(iterator, block)) {
639 FLAC__metadata_object_delete(block);
643 /* back up to the beginning of the block data to stay consistent */
644 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH, SEEK_SET)) {
645 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
646 FLAC__metadata_object_delete(block);
651 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
656 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
658 FLAC__ASSERT_DECLARATION(FLAC__off_t debug_target_offset = iterator->offset[iterator->depth];)
661 FLAC__ASSERT(0 != iterator);
662 FLAC__ASSERT(0 != iterator->file);
663 FLAC__ASSERT(0 != block);
665 if(!iterator->is_writable) {
666 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
670 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO || block->type == FLAC__METADATA_TYPE_STREAMINFO) {
671 if(iterator->type != block->type) {
672 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
677 block->is_last = iterator->is_last;
679 if(iterator->length == block->length)
680 return write_metadata_block_stationary_(iterator, block);
681 else if(iterator->length > block->length) {
682 if(use_padding && iterator->length >= FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) {
683 ret = write_metadata_block_stationary_with_padding_(iterator, block, iterator->length - FLAC__STREAM_METADATA_HEADER_LENGTH - block->length, block->is_last);
684 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
685 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
689 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
690 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
691 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
695 else /* iterator->length < block->length */ {
696 unsigned padding_leftover = 0;
697 FLAC__bool padding_is_last = false;
699 /* first see if we can even use padding */
700 if(iterator->is_last) {
704 const unsigned extra_padding_bytes_required = block->length - iterator->length;
705 simple_iterator_push_(iterator);
706 if(!FLAC__metadata_simple_iterator_next(iterator)) {
707 (void)simple_iterator_pop_(iterator);
710 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
714 if(FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length == extra_padding_bytes_required) {
715 padding_leftover = 0;
716 block->is_last = iterator->is_last;
718 else if(iterator->length < extra_padding_bytes_required)
721 padding_leftover = FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length - extra_padding_bytes_required;
722 padding_is_last = iterator->is_last;
723 block->is_last = false;
726 if(!simple_iterator_pop_(iterator))
731 if(padding_leftover == 0) {
732 ret = write_metadata_block_stationary_(iterator, block);
733 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
734 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
738 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
739 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
740 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
741 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
746 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
747 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
748 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
754 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
756 unsigned padding_leftover = 0;
757 FLAC__bool padding_is_last = false;
759 FLAC__ASSERT_DECLARATION(FLAC__off_t debug_target_offset = iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length;)
762 FLAC__ASSERT(0 != iterator);
763 FLAC__ASSERT(0 != iterator->file);
764 FLAC__ASSERT(0 != block);
766 if(!iterator->is_writable) {
767 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
771 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
772 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
776 block->is_last = iterator->is_last;
779 /* first see if we can even use padding */
780 if(iterator->is_last) {
784 simple_iterator_push_(iterator);
785 if(!FLAC__metadata_simple_iterator_next(iterator)) {
786 (void)simple_iterator_pop_(iterator);
789 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
793 if(iterator->length == block->length) {
794 padding_leftover = 0;
795 block->is_last = iterator->is_last;
797 else if(iterator->length < FLAC__STREAM_METADATA_HEADER_LENGTH + block->length)
800 padding_leftover = iterator->length - block->length;
801 padding_is_last = iterator->is_last;
802 block->is_last = false;
805 if(!simple_iterator_pop_(iterator))
810 /* move to the next block, which is suitable padding */
811 if(!FLAC__metadata_simple_iterator_next(iterator))
813 if(padding_leftover == 0) {
814 ret = write_metadata_block_stationary_(iterator, block);
815 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
816 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
820 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
821 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
822 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
823 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
828 ret = rewrite_whole_file_(iterator, block, /*append=*/true);
829 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
830 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
835 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool use_padding)
837 FLAC__ASSERT_DECLARATION(FLAC__off_t debug_target_offset = iterator->offset[iterator->depth];)
840 if(!iterator->is_writable) {
841 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
845 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO) {
846 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
851 FLAC__StreamMetadata *padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
853 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
856 padding->length = iterator->length;
857 if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false)) {
858 FLAC__metadata_object_delete(padding);
861 FLAC__metadata_object_delete(padding);
862 if(!FLAC__metadata_simple_iterator_prev(iterator))
864 FLAC__ASSERT(iterator->offset[iterator->depth] + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length == debug_target_offset);
865 FLAC__ASSERT(ftello(iterator->file) + (FLAC__off_t)iterator->length == debug_target_offset);
869 ret = rewrite_whole_file_(iterator, 0, /*append=*/false);
870 FLAC__ASSERT(iterator->offset[iterator->depth] + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length == debug_target_offset);
871 FLAC__ASSERT(ftello(iterator->file) + (FLAC__off_t)iterator->length == debug_target_offset);
878 /****************************************************************************
880 * Level 2 implementation
882 ***************************************************************************/
885 typedef struct FLAC__Metadata_Node {
886 FLAC__StreamMetadata *data;
887 struct FLAC__Metadata_Node *prev, *next;
888 } FLAC__Metadata_Node;
890 struct FLAC__Metadata_Chain {
891 char *filename; /* will be NULL if using callbacks */
893 FLAC__Metadata_Node *head;
894 FLAC__Metadata_Node *tail;
896 FLAC__Metadata_ChainStatus status;
897 FLAC__off_t first_offset, last_offset;
899 * This is the length of the chain initially read from the FLAC file.
900 * it is used to compare against the current length to decide whether
901 * or not the whole file has to be rewritten.
903 FLAC__off_t initial_length;
904 /* @@@ hacky, these are currently only needed by ogg reader */
905 FLAC__IOHandle handle;
906 FLAC__IOCallback_Read read_cb;
909 struct FLAC__Metadata_Iterator {
910 FLAC__Metadata_Chain *chain;
911 FLAC__Metadata_Node *current;
914 FLAC_API const char * const FLAC__Metadata_ChainStatusString[] = {
915 "FLAC__METADATA_CHAIN_STATUS_OK",
916 "FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT",
917 "FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE",
918 "FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE",
919 "FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE",
920 "FLAC__METADATA_CHAIN_STATUS_BAD_METADATA",
921 "FLAC__METADATA_CHAIN_STATUS_READ_ERROR",
922 "FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR",
923 "FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR",
924 "FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR",
925 "FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR",
926 "FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR",
927 "FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR",
928 "FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS",
929 "FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH",
930 "FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL"
934 static FLAC__Metadata_Node *node_new_(void)
936 return calloc(1, sizeof(FLAC__Metadata_Node));
939 static void node_delete_(FLAC__Metadata_Node *node)
941 FLAC__ASSERT(0 != node);
943 FLAC__metadata_object_delete(node->data);
947 static void chain_init_(FLAC__Metadata_Chain *chain)
949 FLAC__ASSERT(0 != chain);
952 chain->is_ogg = false;
953 chain->head = chain->tail = 0;
955 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
956 chain->initial_length = 0;
960 static void chain_clear_(FLAC__Metadata_Chain *chain)
962 FLAC__Metadata_Node *node, *next;
964 FLAC__ASSERT(0 != chain);
966 for(node = chain->head; node; ) {
972 if(0 != chain->filename)
973 free(chain->filename);
978 static void chain_append_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
980 FLAC__ASSERT(0 != chain);
981 FLAC__ASSERT(0 != node);
982 FLAC__ASSERT(0 != node->data);
984 node->next = node->prev = 0;
985 node->data->is_last = true;
987 chain->tail->data->is_last = false;
992 FLAC__ASSERT(0 != chain->tail);
993 chain->tail->next = node;
994 node->prev = chain->tail;
1000 static void chain_remove_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1002 FLAC__ASSERT(0 != chain);
1003 FLAC__ASSERT(0 != node);
1005 if(node == chain->head)
1006 chain->head = node->next;
1008 node->prev->next = node->next;
1010 if(node == chain->tail)
1011 chain->tail = node->prev;
1013 node->next->prev = node->prev;
1015 if(0 != chain->tail)
1016 chain->tail->data->is_last = true;
1021 static void chain_delete_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1023 chain_remove_node_(chain, node);
1027 static FLAC__off_t chain_calculate_length_(FLAC__Metadata_Chain *chain)
1029 const FLAC__Metadata_Node *node;
1030 FLAC__off_t length = 0;
1031 for(node = chain->head; node; node = node->next)
1032 length += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1036 static void iterator_insert_node_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1038 FLAC__ASSERT(0 != node);
1039 FLAC__ASSERT(0 != node->data);
1040 FLAC__ASSERT(0 != iterator);
1041 FLAC__ASSERT(0 != iterator->current);
1042 FLAC__ASSERT(0 != iterator->chain);
1043 FLAC__ASSERT(0 != iterator->chain->head);
1044 FLAC__ASSERT(0 != iterator->chain->tail);
1046 node->data->is_last = false;
1048 node->prev = iterator->current->prev;
1049 node->next = iterator->current;
1052 iterator->chain->head = node;
1054 node->prev->next = node;
1056 iterator->current->prev = node;
1058 iterator->chain->nodes++;
1061 static void iterator_insert_node_after_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1063 FLAC__ASSERT(0 != node);
1064 FLAC__ASSERT(0 != node->data);
1065 FLAC__ASSERT(0 != iterator);
1066 FLAC__ASSERT(0 != iterator->current);
1067 FLAC__ASSERT(0 != iterator->chain);
1068 FLAC__ASSERT(0 != iterator->chain->head);
1069 FLAC__ASSERT(0 != iterator->chain->tail);
1071 iterator->current->data->is_last = false;
1073 node->prev = iterator->current;
1074 node->next = iterator->current->next;
1077 iterator->chain->tail = node;
1079 node->next->prev = node;
1081 node->prev->next = node;
1083 iterator->chain->tail->data->is_last = true;
1085 iterator->chain->nodes++;
1088 /* return true iff node and node->next are both padding */
1089 static FLAC__bool chain_merge_adjacent_padding_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1091 if(node->data->type == FLAC__METADATA_TYPE_PADDING && 0 != node->next && node->next->data->type == FLAC__METADATA_TYPE_PADDING) {
1092 const unsigned growth = FLAC__STREAM_METADATA_HEADER_LENGTH + node->next->data->length;
1093 node->data->length += growth; /* new block size can be greater than max metadata block size, but it'll be fixed later in chain_prepare_for_write_() */
1095 chain_delete_node_(chain, node->next);
1102 /* Returns the new length of the chain, or 0 if there was an error. */
1103 /* WATCHOUT: This can get called multiple times before a write, so
1104 * it should still work when this happens.
1106 /* WATCHOUT: Make sure to also update the logic in
1107 * FLAC__metadata_chain_check_if_tempfile_needed() if the logic here changes.
1109 static FLAC__off_t chain_prepare_for_write_(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1111 FLAC__off_t current_length = chain_calculate_length_(chain);
1114 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1115 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1116 const FLAC__off_t delta = chain->initial_length - current_length;
1117 chain->tail->data->length += delta;
1118 current_length += delta;
1119 FLAC__ASSERT(current_length == chain->initial_length);
1121 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1122 else if(current_length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) {
1123 FLAC__StreamMetadata *padding;
1124 FLAC__Metadata_Node *node;
1125 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) {
1126 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1129 padding->length = chain->initial_length - (FLAC__STREAM_METADATA_HEADER_LENGTH + current_length);
1130 if(0 == (node = node_new_())) {
1131 FLAC__metadata_object_delete(padding);
1132 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1135 node->data = padding;
1136 chain_append_node_(chain, node);
1137 current_length = chain_calculate_length_(chain);
1138 FLAC__ASSERT(current_length == chain->initial_length);
1140 /* 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 */
1141 else if(current_length > chain->initial_length) {
1142 const FLAC__off_t delta = current_length - chain->initial_length;
1143 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1144 /* if the delta is exactly the size of the last padding block, remove the padding block */
1145 if((FLAC__off_t)chain->tail->data->length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta) {
1146 chain_delete_node_(chain, chain->tail);
1147 current_length = chain_calculate_length_(chain);
1148 FLAC__ASSERT(current_length == chain->initial_length);
1150 /* if there is at least 'delta' bytes of padding, trim the padding down */
1151 else if((FLAC__off_t)chain->tail->data->length >= delta) {
1152 chain->tail->data->length -= delta;
1153 current_length -= delta;
1154 FLAC__ASSERT(current_length == chain->initial_length);
1160 /* check sizes of all metadata blocks; reduce padding size if necessary */
1162 FLAC__Metadata_Node *node;
1163 for (node = chain->head; node; node = node->next) {
1164 if(node->data->length >= (1u << FLAC__STREAM_METADATA_LENGTH_LEN)) {
1165 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1166 node->data->length = (1u << FLAC__STREAM_METADATA_LENGTH_LEN) - 1;
1167 current_length = chain_calculate_length_(chain);
1169 chain->status = FLAC__METADATA_CHAIN_STATUS_BAD_METADATA;
1176 return current_length;
1179 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)
1181 FLAC__Metadata_Node *node;
1183 FLAC__ASSERT(0 != chain);
1185 /* we assume we're already at the beginning of the file */
1187 switch(seek_to_first_metadata_block_cb_(handle, read_cb, seek_cb)) {
1191 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1194 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1197 chain->status = FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
1205 FLAC__int64 pos = tell_cb(handle);
1207 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1210 chain->first_offset = (FLAC__off_t)pos;
1215 FLAC__MetadataType type;
1221 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1225 if(!read_metadata_block_header_cb_(handle, read_cb, &is_last, &type, &length)) {
1227 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1231 node->data = FLAC__metadata_object_new(type);
1232 if(0 == node->data) {
1234 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1238 node->data->is_last = is_last;
1239 node->data->length = length;
1241 chain->status = get_equivalent_status_(read_metadata_block_data_cb_(handle, read_cb, seek_cb, node->data));
1242 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1246 chain_append_node_(chain, node);
1251 FLAC__int64 pos = tell_cb(handle);
1253 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1256 chain->last_offset = (FLAC__off_t)pos;
1259 chain->initial_length = chain_calculate_length_(chain);
1264 static FLAC__StreamDecoderReadStatus chain_read_ogg_read_cb_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
1266 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1268 if(*bytes > 0 && chain->status == FLAC__METADATA_CHAIN_STATUS_OK) {
1269 *bytes = chain->read_cb(buffer, sizeof(FLAC__byte), *bytes, chain->handle);
1271 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
1273 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
1276 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
1279 static FLAC__StreamDecoderWriteStatus chain_read_ogg_write_cb_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
1281 (void)decoder, (void)frame, (void)buffer, (void)client_data;
1282 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1285 static void chain_read_ogg_metadata_cb_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
1287 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1288 FLAC__Metadata_Node *node;
1294 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1298 node->data = FLAC__metadata_object_clone(metadata);
1299 if(0 == node->data) {
1301 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1305 chain_append_node_(chain, node);
1308 static void chain_read_ogg_error_cb_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1310 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1311 (void)decoder, (void)status;
1312 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1315 static FLAC__bool chain_read_ogg_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb)
1317 FLAC__StreamDecoder *decoder;
1319 FLAC__ASSERT(0 != chain);
1321 /* we assume we're already at the beginning of the file */
1323 chain->handle = handle;
1324 chain->read_cb = read_cb;
1325 if(0 == (decoder = FLAC__stream_decoder_new())) {
1326 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1329 FLAC__stream_decoder_set_metadata_respond_all(decoder);
1330 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) {
1331 FLAC__stream_decoder_delete(decoder);
1332 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1336 chain->first_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1338 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder))
1339 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1340 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1341 FLAC__stream_decoder_delete(decoder);
1345 FLAC__stream_decoder_delete(decoder);
1347 chain->last_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1349 chain->initial_length = chain_calculate_length_(chain);
1354 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)
1356 FLAC__Metadata_Node *node;
1358 FLAC__ASSERT(0 != chain);
1359 FLAC__ASSERT(0 != chain->head);
1361 if(0 != seek_cb(handle, chain->first_offset, SEEK_SET)) {
1362 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1366 for(node = chain->head; node; node = node->next) {
1367 if(!write_metadata_block_header_cb_(handle, write_cb, node->data)) {
1368 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1371 if(!write_metadata_block_data_cb_(handle, write_cb, node->data)) {
1372 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1377 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1379 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1383 static FLAC__bool chain_rewrite_metadata_in_place_(FLAC__Metadata_Chain *chain)
1388 FLAC__ASSERT(0 != chain->filename);
1390 if(0 == (file = flac_fopen(chain->filename, "r+b"))) {
1391 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1395 /* chain_rewrite_metadata_in_place_cb_() sets chain->status for us */
1396 ret = chain_rewrite_metadata_in_place_cb_(chain, (FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, fseek_wrapper_);
1403 static FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix)
1405 FILE *f, *tempfile = NULL;
1407 FLAC__Metadata_SimpleIteratorStatus status;
1408 const FLAC__Metadata_Node *node;
1410 FLAC__ASSERT(0 != chain);
1411 FLAC__ASSERT(0 != chain->filename);
1412 FLAC__ASSERT(0 != chain->head);
1414 /* copy the file prefix (data up to first metadata block */
1415 if(0 == (f = flac_fopen(chain->filename, "rb"))) {
1416 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1419 if(!open_tempfile_(chain->filename, tempfile_path_prefix, &tempfile, &tempfilename, &status)) {
1420 chain->status = get_equivalent_status_(status);
1423 if(!copy_n_bytes_from_file_(f, tempfile, chain->first_offset, &status)) {
1424 chain->status = get_equivalent_status_(status);
1428 /* write the metadata */
1429 for(node = chain->head; node; node = node->next) {
1430 if(!write_metadata_block_header_(tempfile, &status, node->data)) {
1431 chain->status = get_equivalent_status_(status);
1434 if(!write_metadata_block_data_(tempfile, &status, node->data)) {
1435 chain->status = get_equivalent_status_(status);
1439 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1441 /* copy the file postfix (everything after the metadata) */
1442 if(0 != fseeko(f, chain->last_offset, SEEK_SET)) {
1443 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1446 if(!copy_remaining_bytes_from_file_(f, tempfile, &status)) {
1447 chain->status = get_equivalent_status_(status);
1451 /* move the tempfile on top of the original */
1453 if(!transport_tempfile_(chain->filename, &tempfile, &tempfilename, &status))
1460 cleanup_tempfile_(&tempfile, &tempfilename);
1464 /* assumes 'handle' is already at beginning of file */
1465 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)
1467 FLAC__Metadata_SimpleIteratorStatus status;
1468 const FLAC__Metadata_Node *node;
1470 FLAC__ASSERT(0 != chain);
1471 FLAC__ASSERT(0 == chain->filename);
1472 FLAC__ASSERT(0 != chain->head);
1474 /* copy the file prefix (data up to first metadata block */
1475 if(!copy_n_bytes_from_file_cb_(handle, read_cb, temp_handle, temp_write_cb, chain->first_offset, &status)) {
1476 chain->status = get_equivalent_status_(status);
1480 /* write the metadata */
1481 for(node = chain->head; node; node = node->next) {
1482 if(!write_metadata_block_header_cb_(temp_handle, temp_write_cb, node->data)) {
1483 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1486 if(!write_metadata_block_data_cb_(temp_handle, temp_write_cb, node->data)) {
1487 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1491 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1493 /* copy the file postfix (everything after the metadata) */
1494 if(0 != seek_cb(handle, chain->last_offset, SEEK_SET)) {
1495 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1498 if(!copy_remaining_bytes_from_file_cb_(handle, read_cb, eof_cb, temp_handle, temp_write_cb, &status)) {
1499 chain->status = get_equivalent_status_(status);
1506 FLAC_API FLAC__Metadata_Chain *FLAC__metadata_chain_new(void)
1508 FLAC__Metadata_Chain *chain = calloc(1, sizeof(FLAC__Metadata_Chain));
1516 FLAC_API void FLAC__metadata_chain_delete(FLAC__Metadata_Chain *chain)
1518 FLAC__ASSERT(0 != chain);
1520 chain_clear_(chain);
1525 FLAC_API FLAC__Metadata_ChainStatus FLAC__metadata_chain_status(FLAC__Metadata_Chain *chain)
1527 FLAC__Metadata_ChainStatus status;
1529 FLAC__ASSERT(0 != chain);
1531 status = chain->status;
1532 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1536 static FLAC__bool chain_read_(FLAC__Metadata_Chain *chain, const char *filename, FLAC__bool is_ogg)
1541 FLAC__ASSERT(0 != chain);
1542 FLAC__ASSERT(0 != filename);
1544 chain_clear_(chain);
1546 if(0 == (chain->filename = strdup(filename))) {
1547 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1551 chain->is_ogg = is_ogg;
1553 if(0 == (file = flac_fopen(filename, "rb"))) {
1554 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1558 /* the function also sets chain->status for us */
1560 chain_read_ogg_cb_(chain, file, (FLAC__IOCallback_Read)fread) :
1561 chain_read_cb_(chain, file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, ftell_wrapper_)
1569 FLAC_API FLAC__bool FLAC__metadata_chain_read(FLAC__Metadata_Chain *chain, const char *filename)
1571 return chain_read_(chain, filename, /*is_ogg=*/false);
1574 /*@@@@add to tests*/
1575 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg(FLAC__Metadata_Chain *chain, const char *filename)
1577 return chain_read_(chain, filename, /*is_ogg=*/true);
1580 static FLAC__bool chain_read_with_callbacks_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks, FLAC__bool is_ogg)
1584 FLAC__ASSERT(0 != chain);
1586 chain_clear_(chain);
1588 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.tell) {
1589 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1593 chain->is_ogg = is_ogg;
1596 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1597 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1601 /* the function also sets chain->status for us */
1603 chain_read_ogg_cb_(chain, handle, callbacks.read) :
1604 chain_read_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.tell)
1610 FLAC_API FLAC__bool FLAC__metadata_chain_read_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1612 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/false);
1615 /*@@@@add to tests*/
1616 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1618 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/true);
1628 FLAC_API FLAC__bool FLAC__metadata_chain_check_if_tempfile_needed(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1630 /* This does all the same checks that are in chain_prepare_for_write_()
1631 * but doesn't actually alter the chain. Make sure to update the logic
1632 * here if chain_prepare_for_write_() changes.
1634 FLAC__off_t current_length;
1635 LastBlockState lbs_state = LBS_NONE;
1636 unsigned lbs_size = 0;
1638 FLAC__ASSERT(0 != chain);
1640 current_length = chain_calculate_length_(chain);
1643 const FLAC__Metadata_Node * const node = chain->tail;
1644 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1645 if(current_length < chain->initial_length && node->data->type == FLAC__METADATA_TYPE_PADDING) {
1646 lbs_state = LBS_SIZE_CHANGED;
1647 lbs_size = node->data->length + (chain->initial_length - current_length);
1649 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1650 else if(current_length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) {
1651 lbs_state = LBS_BLOCK_ADDED;
1652 lbs_size = chain->initial_length - (current_length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
1654 /* 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 */
1655 else if(current_length > chain->initial_length) {
1656 const FLAC__off_t delta = current_length - chain->initial_length;
1657 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1658 /* if the delta is exactly the size of the last padding block, remove the padding block */
1659 if((FLAC__off_t)node->data->length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta) {
1660 lbs_state = LBS_BLOCK_REMOVED;
1663 /* if there is at least 'delta' bytes of padding, trim the padding down */
1664 else if((FLAC__off_t)node->data->length >= delta) {
1665 lbs_state = LBS_SIZE_CHANGED;
1666 lbs_size = node->data->length - delta;
1673 /* check sizes of all metadata blocks; reduce padding size if necessary */
1675 const FLAC__Metadata_Node *node;
1676 for(node = chain->head; node; node = node->next) {
1677 unsigned block_len = node->data->length;
1678 if(node == chain->tail) {
1679 if(lbs_state == LBS_BLOCK_REMOVED)
1681 else if(lbs_state == LBS_SIZE_CHANGED)
1682 block_len = lbs_size;
1684 if(block_len >= (1u << FLAC__STREAM_METADATA_LENGTH_LEN)) {
1685 if(node->data->type == FLAC__METADATA_TYPE_PADDING)
1686 block_len = (1u << FLAC__STREAM_METADATA_LENGTH_LEN) - 1;
1688 return false /* the return value doesn't matter */;
1690 current_length += (FLAC__STREAM_METADATA_HEADER_LENGTH + block_len);
1693 if(lbs_state == LBS_BLOCK_ADDED) {
1694 /* test added padding block */
1695 unsigned block_len = lbs_size;
1696 if(block_len >= (1u << FLAC__STREAM_METADATA_LENGTH_LEN))
1697 block_len = (1u << FLAC__STREAM_METADATA_LENGTH_LEN) - 1;
1698 current_length += (FLAC__STREAM_METADATA_HEADER_LENGTH + block_len);
1702 return (current_length != chain->initial_length);
1705 FLAC_API FLAC__bool FLAC__metadata_chain_write(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats)
1707 struct flac_stat_s stats;
1708 const char *tempfile_path_prefix = 0;
1709 FLAC__off_t current_length;
1711 FLAC__ASSERT(0 != chain);
1713 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1714 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1718 if (0 == chain->filename) {
1719 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1723 current_length = chain_prepare_for_write_(chain, use_padding);
1725 /* a return value of 0 means there was an error; chain->status is already set */
1726 if (0 == current_length)
1729 if(preserve_file_stats)
1730 get_file_stats_(chain->filename, &stats);
1732 if(current_length == chain->initial_length) {
1733 if(!chain_rewrite_metadata_in_place_(chain))
1737 if(!chain_rewrite_file_(chain, tempfile_path_prefix))
1740 /* recompute lengths and offsets */
1742 const FLAC__Metadata_Node *node;
1743 chain->initial_length = current_length;
1744 chain->last_offset = chain->first_offset;
1745 for(node = chain->head; node; node = node->next)
1746 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1750 if(preserve_file_stats)
1751 set_file_stats_(chain->filename, &stats);
1756 FLAC_API FLAC__bool FLAC__metadata_chain_write_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1758 FLAC__off_t current_length;
1760 FLAC__ASSERT(0 != chain);
1762 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1763 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1767 if (0 != chain->filename) {
1768 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1772 if (0 == callbacks.write || 0 == callbacks.seek) {
1773 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1777 if (FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1778 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1782 current_length = chain_prepare_for_write_(chain, use_padding);
1784 /* a return value of 0 means there was an error; chain->status is already set */
1785 if (0 == current_length)
1788 FLAC__ASSERT(current_length == chain->initial_length);
1790 return chain_rewrite_metadata_in_place_cb_(chain, handle, callbacks.write, callbacks.seek);
1793 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)
1795 FLAC__off_t current_length;
1797 FLAC__ASSERT(0 != chain);
1799 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1800 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1804 if (0 != chain->filename) {
1805 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1809 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.eof) {
1810 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1813 if (0 == temp_callbacks.write) {
1814 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1818 if (!FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1819 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1823 current_length = chain_prepare_for_write_(chain, use_padding);
1825 /* a return value of 0 means there was an error; chain->status is already set */
1826 if (0 == current_length)
1829 FLAC__ASSERT(current_length != chain->initial_length);
1832 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1833 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1837 if(!chain_rewrite_file_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.eof, temp_handle, temp_callbacks.write))
1840 /* recompute lengths and offsets */
1842 const FLAC__Metadata_Node *node;
1843 chain->initial_length = current_length;
1844 chain->last_offset = chain->first_offset;
1845 for(node = chain->head; node; node = node->next)
1846 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1852 FLAC_API void FLAC__metadata_chain_merge_padding(FLAC__Metadata_Chain *chain)
1854 FLAC__Metadata_Node *node;
1856 FLAC__ASSERT(0 != chain);
1858 for(node = chain->head; node; ) {
1859 if(!chain_merge_adjacent_padding_(chain, node))
1864 FLAC_API void FLAC__metadata_chain_sort_padding(FLAC__Metadata_Chain *chain)
1866 FLAC__Metadata_Node *node, *save;
1869 FLAC__ASSERT(0 != chain);
1872 * Don't try and be too smart... this simple algo is good enough for
1873 * the small number of nodes that we deal with.
1875 for(i = 0, node = chain->head; i < chain->nodes; i++) {
1876 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1878 chain_remove_node_(chain, node);
1879 chain_append_node_(chain, node);
1887 FLAC__metadata_chain_merge_padding(chain);
1891 FLAC_API FLAC__Metadata_Iterator *FLAC__metadata_iterator_new(void)
1893 FLAC__Metadata_Iterator *iterator = calloc(1, sizeof(FLAC__Metadata_Iterator));
1895 /* calloc() implies:
1896 iterator->current = 0;
1897 iterator->chain = 0;
1903 FLAC_API void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator)
1905 FLAC__ASSERT(0 != iterator);
1910 FLAC_API void FLAC__metadata_iterator_init(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Chain *chain)
1912 FLAC__ASSERT(0 != iterator);
1913 FLAC__ASSERT(0 != chain);
1914 FLAC__ASSERT(0 != chain->head);
1916 iterator->chain = chain;
1917 iterator->current = chain->head;
1920 FLAC_API FLAC__bool FLAC__metadata_iterator_next(FLAC__Metadata_Iterator *iterator)
1922 FLAC__ASSERT(0 != iterator);
1924 if(0 == iterator->current || 0 == iterator->current->next)
1927 iterator->current = iterator->current->next;
1931 FLAC_API FLAC__bool FLAC__metadata_iterator_prev(FLAC__Metadata_Iterator *iterator)
1933 FLAC__ASSERT(0 != iterator);
1935 if(0 == iterator->current || 0 == iterator->current->prev)
1938 iterator->current = iterator->current->prev;
1942 FLAC_API FLAC__MetadataType FLAC__metadata_iterator_get_block_type(const FLAC__Metadata_Iterator *iterator)
1944 FLAC__ASSERT(0 != iterator);
1945 FLAC__ASSERT(0 != iterator->current);
1946 FLAC__ASSERT(0 != iterator->current->data);
1948 return iterator->current->data->type;
1951 FLAC_API FLAC__StreamMetadata *FLAC__metadata_iterator_get_block(FLAC__Metadata_Iterator *iterator)
1953 FLAC__ASSERT(0 != iterator);
1954 FLAC__ASSERT(0 != iterator->current);
1956 return iterator->current->data;
1959 FLAC_API FLAC__bool FLAC__metadata_iterator_set_block(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1961 FLAC__ASSERT(0 != iterator);
1962 FLAC__ASSERT(0 != block);
1963 return FLAC__metadata_iterator_delete_block(iterator, false) && FLAC__metadata_iterator_insert_block_after(iterator, block);
1966 FLAC_API FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__Metadata_Iterator *iterator, FLAC__bool replace_with_padding)
1968 FLAC__Metadata_Node *save;
1970 FLAC__ASSERT(0 != iterator);
1971 FLAC__ASSERT(0 != iterator->current);
1973 if(0 == iterator->current->prev) {
1974 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1978 save = iterator->current->prev;
1980 if(replace_with_padding) {
1981 FLAC__metadata_object_delete_data(iterator->current->data);
1982 iterator->current->data->type = FLAC__METADATA_TYPE_PADDING;
1985 chain_delete_node_(iterator->chain, iterator->current);
1988 iterator->current = save;
1992 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1994 FLAC__Metadata_Node *node;
1996 FLAC__ASSERT(0 != iterator);
1997 FLAC__ASSERT(0 != iterator->current);
1998 FLAC__ASSERT(0 != block);
2000 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
2003 if(0 == iterator->current->prev) {
2004 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
2008 if(0 == (node = node_new_()))
2012 iterator_insert_node_(iterator, node);
2013 iterator->current = node;
2017 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
2019 FLAC__Metadata_Node *node;
2021 FLAC__ASSERT(0 != iterator);
2022 FLAC__ASSERT(0 != iterator->current);
2023 FLAC__ASSERT(0 != block);
2025 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
2028 if(0 == (node = node_new_()))
2032 iterator_insert_node_after_(iterator, node);
2033 iterator->current = node;
2038 /****************************************************************************
2040 * Local function definitions
2042 ***************************************************************************/
2044 void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
2050 for(i = 0; i < bytes; i++) {
2051 *(--b) = (FLAC__byte)(val & 0xff);
2056 void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
2060 for(i = 0; i < bytes; i++) {
2061 *(b++) = (FLAC__byte)(val & 0xff);
2066 void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes)
2072 for(i = 0; i < bytes; i++) {
2073 *(--b) = (FLAC__byte)(val & 0xff);
2078 FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes)
2080 FLAC__uint32 ret = 0;
2083 for(i = 0; i < bytes; i++)
2084 ret = (ret << 8) | (FLAC__uint32)(*b++);
2089 FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes)
2091 FLAC__uint32 ret = 0;
2096 for(i = 0; i < bytes; i++)
2097 ret = (ret << 8) | (FLAC__uint32)(*--b);
2102 FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes)
2104 FLAC__uint64 ret = 0;
2107 for(i = 0; i < bytes; i++)
2108 ret = (ret << 8) | (FLAC__uint64)(*b++);
2113 FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator)
2115 FLAC__ASSERT(0 != iterator);
2116 FLAC__ASSERT(0 != iterator->file);
2118 if(!read_metadata_block_header_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, &iterator->is_last, &iterator->type, &iterator->length)) {
2119 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2126 FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block)
2128 FLAC__ASSERT(0 != iterator);
2129 FLAC__ASSERT(0 != iterator->file);
2131 iterator->status = read_metadata_block_data_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, block);
2133 return (iterator->status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK);
2136 FLAC__bool read_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__bool *is_last, FLAC__MetadataType *type, unsigned *length)
2138 FLAC__byte raw_header[FLAC__STREAM_METADATA_HEADER_LENGTH];
2140 if(read_cb(raw_header, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2143 *is_last = raw_header[0] & 0x80? true : false;
2144 *type = (FLAC__MetadataType)(raw_header[0] & 0x7f);
2145 *length = unpack_uint32_(raw_header + 1, 3);
2147 /* Note that we don't check:
2148 * if(iterator->type >= FLAC__METADATA_TYPE_UNDEFINED)
2149 * we just will read in an opaque block
2155 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata *block)
2157 switch(block->type) {
2158 case FLAC__METADATA_TYPE_STREAMINFO:
2159 return read_metadata_block_data_streaminfo_cb_(handle, read_cb, &block->data.stream_info);
2160 case FLAC__METADATA_TYPE_PADDING:
2161 return read_metadata_block_data_padding_cb_(handle, seek_cb, &block->data.padding, block->length);
2162 case FLAC__METADATA_TYPE_APPLICATION:
2163 return read_metadata_block_data_application_cb_(handle, read_cb, &block->data.application, block->length);
2164 case FLAC__METADATA_TYPE_SEEKTABLE:
2165 return read_metadata_block_data_seektable_cb_(handle, read_cb, &block->data.seek_table, block->length);
2166 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2167 return read_metadata_block_data_vorbis_comment_cb_(handle, read_cb, seek_cb, &block->data.vorbis_comment, block->length);
2168 case FLAC__METADATA_TYPE_CUESHEET:
2169 return read_metadata_block_data_cuesheet_cb_(handle, read_cb, &block->data.cue_sheet);
2170 case FLAC__METADATA_TYPE_PICTURE:
2171 return read_metadata_block_data_picture_cb_(handle, read_cb, &block->data.picture);
2173 return read_metadata_block_data_unknown_cb_(handle, read_cb, &block->data.unknown, block->length);
2177 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block)
2179 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH], *b;
2181 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2182 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2186 /* we are using hardcoded numbers for simplicity but we should
2187 * probably eventually write a bit-level unpacker and use the
2188 * _STREAMINFO_ constants.
2190 block->min_blocksize = unpack_uint32_(b, 2); b += 2;
2191 block->max_blocksize = unpack_uint32_(b, 2); b += 2;
2192 block->min_framesize = unpack_uint32_(b, 3); b += 3;
2193 block->max_framesize = unpack_uint32_(b, 3); b += 3;
2194 block->sample_rate = (unpack_uint32_(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4);
2195 block->channels = (unsigned)((b[2] & 0x0e) >> 1) + 1;
2196 block->bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 4) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1;
2197 block->total_samples = (((FLAC__uint64)(b[3] & 0x0f)) << 32) | unpack_uint64_(b+4, 4);
2198 memcpy(block->md5sum, b+8, 16);
2200 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2203 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_Padding *block, unsigned block_length)
2205 (void)block; /* nothing to do; we don't care about reading the padding bytes */
2207 if(0 != seek_cb(handle, block_length, SEEK_CUR))
2208 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2210 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2213 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Application *block, unsigned block_length)
2215 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2217 if(read_cb(block->id, 1, id_bytes, handle) != id_bytes)
2218 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2220 if(block_length < id_bytes)
2221 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2223 block_length -= id_bytes;
2225 if(block_length == 0) {
2229 if(0 == (block->data = malloc(block_length)))
2230 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2232 if(read_cb(block->data, 1, block_length, handle) != block_length)
2233 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2236 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2239 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_SeekTable *block, unsigned block_length)
2242 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2244 FLAC__ASSERT(block_length % FLAC__STREAM_METADATA_SEEKPOINT_LENGTH == 0);
2246 block->num_points = block_length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
2248 if(block->num_points == 0)
2250 else if(0 == (block->points = safe_malloc_mul_2op_p(block->num_points, /*times*/sizeof(FLAC__StreamMetadata_SeekPoint))))
2251 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2253 for(i = 0; i < block->num_points; i++) {
2254 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2255 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2256 /* some MAGIC NUMBERs here */
2257 block->points[i].sample_number = unpack_uint64_(buffer, 8);
2258 block->points[i].stream_offset = unpack_uint64_(buffer+8, 8);
2259 block->points[i].frame_samples = unpack_uint32_(buffer+16, 2);
2262 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2265 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment_Entry *entry, unsigned max_length)
2267 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2268 FLAC__byte buffer[4]; /* magic number is asserted below */
2270 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8 == sizeof(buffer));
2272 if(max_length < entry_length_len)
2273 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA;
2275 max_length -= entry_length_len;
2276 if(read_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2277 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2278 entry->length = unpack_uint32_little_endian_(buffer, entry_length_len);
2279 if(max_length < entry->length) {
2281 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA;
2282 } else max_length -= entry->length;
2284 if(0 != entry->entry)
2287 if(entry->length == 0) {
2291 if(0 == (entry->entry = safe_malloc_add_2op_(entry->length, /*+*/1)))
2292 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2294 if(read_cb(entry->entry, 1, entry->length, handle) != entry->length)
2295 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2297 entry->entry[entry->length] = '\0';
2300 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2303 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_VorbisComment *block, unsigned block_length)
2306 FLAC__Metadata_SimpleIteratorStatus status;
2307 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2308 FLAC__byte buffer[4]; /* magic number is asserted below */
2310 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8 == sizeof(buffer));
2312 status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, &(block->vendor_string), block_length);
2313 if(block_length >= 4)
2315 if(status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA)
2317 else if(status != FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK)
2319 block_length -= block->vendor_string.length;
2321 if(block_length < num_comments_len) goto skip; else block_length -= num_comments_len;
2322 if(read_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2323 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2324 block->num_comments = unpack_uint32_little_endian_(buffer, num_comments_len);
2326 if(block->num_comments == 0) {
2327 block->comments = 0;
2329 else if(0 == (block->comments = calloc(block->num_comments, sizeof(FLAC__StreamMetadata_VorbisComment_Entry)))) {
2330 block->num_comments = 0;
2331 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2334 for(i = 0; i < block->num_comments; i++) {
2335 status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, block->comments + i, block_length);
2336 if(block_length >= 4) block_length -= 4;
2337 if(status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA) {
2338 block->num_comments = i;
2341 else if(status != FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK) return status;
2342 block_length -= block->comments[i].length;
2346 if(block_length > 0) {
2348 if(0 != seek_cb(handle, block_length, SEEK_CUR))
2349 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2352 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2355 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track)
2358 FLAC__byte buffer[32]; /* asserted below that this is big enough */
2360 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2361 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2362 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);
2364 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2365 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2366 if(read_cb(buffer, 1, len, handle) != len)
2367 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2368 track->offset = unpack_uint64_(buffer, len);
2370 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2371 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2372 if(read_cb(buffer, 1, len, handle) != len)
2373 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2374 track->number = (FLAC__byte)unpack_uint32_(buffer, len);
2376 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2377 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2378 if(read_cb(track->isrc, 1, len, handle) != len)
2379 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2381 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);
2382 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2383 if(read_cb(buffer, 1, len, handle) != len)
2384 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2385 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN == 1);
2386 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN == 1);
2387 track->type = buffer[0] >> 7;
2388 track->pre_emphasis = (buffer[0] >> 6) & 1;
2390 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2391 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2392 if(read_cb(buffer, 1, len, handle) != len)
2393 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2394 track->num_indices = (FLAC__byte)unpack_uint32_(buffer, len);
2396 if(track->num_indices == 0) {
2399 else if(0 == (track->indices = calloc(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index))))
2400 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2402 for(i = 0; i < track->num_indices; i++) {
2403 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2404 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2405 if(read_cb(buffer, 1, len, handle) != len)
2406 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2407 track->indices[i].offset = unpack_uint64_(buffer, len);
2409 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2410 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2411 if(read_cb(buffer, 1, len, handle) != len)
2412 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2413 track->indices[i].number = (FLAC__byte)unpack_uint32_(buffer, len);
2415 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2416 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2417 if(read_cb(buffer, 1, len, handle) != len)
2418 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2421 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2424 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block)
2427 FLAC__Metadata_SimpleIteratorStatus status;
2428 FLAC__byte buffer[1024]; /* MSVC needs a constant expression so we put a magic number and assert */
2430 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN)/8 <= sizeof(buffer));
2431 FLAC__ASSERT(sizeof(FLAC__uint64) <= sizeof(buffer));
2433 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2434 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2435 if(read_cb(block->media_catalog_number, 1, len, handle) != len)
2436 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2438 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2439 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2440 if(read_cb(buffer, 1, len, handle) != len)
2441 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2442 block->lead_in = unpack_uint64_(buffer, len);
2444 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2445 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2446 if(read_cb(buffer, 1, len, handle) != len)
2447 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2448 block->is_cd = buffer[0]&0x80? true : false;
2450 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2451 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2452 if(read_cb(buffer, 1, len, handle) != len)
2453 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2454 block->num_tracks = unpack_uint32_(buffer, len);
2456 if(block->num_tracks == 0) {
2459 else if(0 == (block->tracks = calloc(block->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track))))
2460 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2462 for(i = 0; i < block->num_tracks; i++) {
2463 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_cuesheet_track_cb_(handle, read_cb, block->tracks + i)))
2467 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2470 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)
2472 FLAC__byte buffer[sizeof(FLAC__uint32)];
2474 FLAC__ASSERT(0 != data);
2475 FLAC__ASSERT(length_len%8 == 0);
2477 length_len /= 8; /* convert to bytes */
2479 FLAC__ASSERT(sizeof(buffer) >= length_len);
2481 if(read_cb(buffer, 1, length_len, handle) != length_len)
2482 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2483 *length = unpack_uint32_(buffer, length_len);
2488 if(0 == (*data = safe_malloc_add_2op_(*length, /*+*/1)))
2489 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2492 if(read_cb(*data, 1, *length, handle) != *length)
2493 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2496 (*data)[*length] = '\0';
2498 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2501 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block)
2503 FLAC__Metadata_SimpleIteratorStatus status;
2504 FLAC__byte buffer[4]; /* asserted below that this is big enough */
2507 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2508 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2509 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2510 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2511 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2513 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_TYPE_LEN % 8 == 0);
2514 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN / 8;
2515 if(read_cb(buffer, 1, len, handle) != len)
2516 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2517 block->type = (FLAC__StreamMetadata_Picture_Type)unpack_uint32_(buffer, len);
2519 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)
2522 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)
2525 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN % 8 == 0);
2526 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN / 8;
2527 if(read_cb(buffer, 1, len, handle) != len)
2528 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2529 block->width = unpack_uint32_(buffer, len);
2531 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN % 8 == 0);
2532 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN / 8;
2533 if(read_cb(buffer, 1, len, handle) != len)
2534 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2535 block->height = unpack_uint32_(buffer, len);
2537 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN % 8 == 0);
2538 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN / 8;
2539 if(read_cb(buffer, 1, len, handle) != len)
2540 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2541 block->depth = unpack_uint32_(buffer, len);
2543 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_COLORS_LEN % 8 == 0);
2544 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN / 8;
2545 if(read_cb(buffer, 1, len, handle) != len)
2546 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2547 block->colors = unpack_uint32_(buffer, len);
2549 /* for convenience we use read_metadata_block_data_picture_cstring_cb_() even though it adds an extra terminating NUL we don't use */
2550 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)
2553 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2556 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2558 if(block_length == 0) {
2562 if(0 == (block->data = malloc(block_length)))
2563 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2565 if(read_cb(block->data, 1, block_length, handle) != block_length)
2566 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2569 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2572 FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2574 FLAC__ASSERT(0 != file);
2575 FLAC__ASSERT(0 != status);
2577 if(!write_metadata_block_header_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2578 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2585 FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2587 FLAC__ASSERT(0 != file);
2588 FLAC__ASSERT(0 != status);
2590 if (write_metadata_block_data_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2591 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2595 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2600 FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2602 FLAC__byte buffer[FLAC__STREAM_METADATA_HEADER_LENGTH];
2604 FLAC__ASSERT(block->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
2605 /* double protection */
2606 if(block->length >= (1u << FLAC__STREAM_METADATA_LENGTH_LEN))
2609 buffer[0] = (block->is_last? 0x80 : 0) | (FLAC__byte)block->type;
2610 pack_uint32_(block->length, buffer + 1, 3);
2612 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2618 FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2620 FLAC__ASSERT(0 != block);
2622 switch(block->type) {
2623 case FLAC__METADATA_TYPE_STREAMINFO:
2624 return write_metadata_block_data_streaminfo_cb_(handle, write_cb, &block->data.stream_info);
2625 case FLAC__METADATA_TYPE_PADDING:
2626 return write_metadata_block_data_padding_cb_(handle, write_cb, &block->data.padding, block->length);
2627 case FLAC__METADATA_TYPE_APPLICATION:
2628 return write_metadata_block_data_application_cb_(handle, write_cb, &block->data.application, block->length);
2629 case FLAC__METADATA_TYPE_SEEKTABLE:
2630 return write_metadata_block_data_seektable_cb_(handle, write_cb, &block->data.seek_table);
2631 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2632 return write_metadata_block_data_vorbis_comment_cb_(handle, write_cb, &block->data.vorbis_comment);
2633 case FLAC__METADATA_TYPE_CUESHEET:
2634 return write_metadata_block_data_cuesheet_cb_(handle, write_cb, &block->data.cue_sheet);
2635 case FLAC__METADATA_TYPE_PICTURE:
2636 return write_metadata_block_data_picture_cb_(handle, write_cb, &block->data.picture);
2638 return write_metadata_block_data_unknown_cb_(handle, write_cb, &block->data.unknown, block->length);
2642 FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block)
2644 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH];
2645 const unsigned channels1 = block->channels - 1;
2646 const unsigned bps1 = block->bits_per_sample - 1;
2648 /* we are using hardcoded numbers for simplicity but we should
2649 * probably eventually write a bit-level packer and use the
2650 * _STREAMINFO_ constants.
2652 pack_uint32_(block->min_blocksize, buffer, 2);
2653 pack_uint32_(block->max_blocksize, buffer+2, 2);
2654 pack_uint32_(block->min_framesize, buffer+4, 3);
2655 pack_uint32_(block->max_framesize, buffer+7, 3);
2656 buffer[10] = (block->sample_rate >> 12) & 0xff;
2657 buffer[11] = (block->sample_rate >> 4) & 0xff;
2658 buffer[12] = ((block->sample_rate & 0x0f) << 4) | (channels1 << 1) | (bps1 >> 4);
2659 buffer[13] = (FLAC__byte)(((bps1 & 0x0f) << 4) | ((block->total_samples >> 32) & 0x0f));
2660 pack_uint32_((FLAC__uint32)block->total_samples, buffer+14, 4);
2661 memcpy(buffer+18, block->md5sum, 16);
2663 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2669 FLAC__bool write_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Padding *block, unsigned block_length)
2671 unsigned i, n = block_length;
2672 FLAC__byte buffer[1024];
2676 memset(buffer, 0, 1024);
2678 for(i = 0; i < n/1024; i++)
2679 if(write_cb(buffer, 1, 1024, handle) != 1024)
2684 if(write_cb(buffer, 1, n, handle) != n)
2690 FLAC__bool write_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Application *block, unsigned block_length)
2692 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2694 if(write_cb(block->id, 1, id_bytes, handle) != id_bytes)
2697 block_length -= id_bytes;
2699 if(write_cb(block->data, 1, block_length, handle) != block_length)
2705 FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block)
2708 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2710 for(i = 0; i < block->num_points; i++) {
2711 /* some MAGIC NUMBERs here */
2712 pack_uint64_(block->points[i].sample_number, buffer, 8);
2713 pack_uint64_(block->points[i].stream_offset, buffer+8, 8);
2714 pack_uint32_(block->points[i].frame_samples, buffer+16, 2);
2715 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2722 FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block)
2725 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2726 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2727 FLAC__byte buffer[4]; /* magic number is asserted below */
2729 FLAC__ASSERT(flac_max(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN, FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8 == sizeof(buffer));
2731 pack_uint32_little_endian_(block->vendor_string.length, buffer, entry_length_len);
2732 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2734 if(write_cb(block->vendor_string.entry, 1, block->vendor_string.length, handle) != block->vendor_string.length)
2737 pack_uint32_little_endian_(block->num_comments, buffer, num_comments_len);
2738 if(write_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2741 for(i = 0; i < block->num_comments; i++) {
2742 pack_uint32_little_endian_(block->comments[i].length, buffer, entry_length_len);
2743 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2745 if(write_cb(block->comments[i].entry, 1, block->comments[i].length, handle) != block->comments[i].length)
2752 FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block)
2755 FLAC__byte buffer[1024]; /* asserted below that this is big enough */
2757 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2758 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN/8);
2759 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);
2760 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2762 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2763 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2764 if(write_cb(block->media_catalog_number, 1, len, handle) != len)
2767 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2768 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2769 pack_uint64_(block->lead_in, buffer, len);
2770 if(write_cb(buffer, 1, len, handle) != len)
2773 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2774 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2775 memset(buffer, 0, len);
2778 if(write_cb(buffer, 1, len, handle) != len)
2781 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2782 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2783 pack_uint32_(block->num_tracks, buffer, len);
2784 if(write_cb(buffer, 1, len, handle) != len)
2787 for(i = 0; i < block->num_tracks; i++) {
2788 FLAC__StreamMetadata_CueSheet_Track *track = block->tracks + i;
2790 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2791 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2792 pack_uint64_(track->offset, buffer, len);
2793 if(write_cb(buffer, 1, len, handle) != len)
2796 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2797 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2798 pack_uint32_(track->number, buffer, len);
2799 if(write_cb(buffer, 1, len, handle) != len)
2802 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2803 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2804 if(write_cb(track->isrc, 1, len, handle) != len)
2807 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);
2808 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2809 memset(buffer, 0, len);
2810 buffer[0] = (track->type << 7) | (track->pre_emphasis << 6);
2811 if(write_cb(buffer, 1, len, handle) != len)
2814 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2815 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2816 pack_uint32_(track->num_indices, buffer, len);
2817 if(write_cb(buffer, 1, len, handle) != len)
2820 for(j = 0; j < track->num_indices; j++) {
2821 FLAC__StreamMetadata_CueSheet_Index *indx = track->indices + j;
2823 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2824 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2825 pack_uint64_(indx->offset, buffer, len);
2826 if(write_cb(buffer, 1, len, handle) != len)
2829 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2830 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2831 pack_uint32_(indx->number, buffer, len);
2832 if(write_cb(buffer, 1, len, handle) != len)
2835 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2836 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2837 memset(buffer, 0, len);
2838 if(write_cb(buffer, 1, len, handle) != len)
2846 FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block)
2850 FLAC__byte buffer[4]; /* magic number is asserted below */
2852 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_TYPE_LEN%8);
2853 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN%8);
2854 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN%8);
2855 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN%8);
2856 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN%8);
2857 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN%8);
2858 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_COLORS_LEN%8);
2859 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN%8);
2860 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2861 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8);
2862 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8);
2863 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2864 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2865 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2866 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2867 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8);
2869 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8;
2870 pack_uint32_(block->type, buffer, len);
2871 if(write_cb(buffer, 1, len, handle) != len)
2874 len = FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8;
2875 slen = strlen(block->mime_type);
2876 pack_uint32_(slen, buffer, len);
2877 if(write_cb(buffer, 1, len, handle) != len)
2879 if(write_cb(block->mime_type, 1, slen, handle) != slen)
2882 len = FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8;
2883 slen = strlen((const char *)block->description);
2884 pack_uint32_(slen, buffer, len);
2885 if(write_cb(buffer, 1, len, handle) != len)
2887 if(write_cb(block->description, 1, slen, handle) != slen)
2890 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8;
2891 pack_uint32_(block->width, buffer, len);
2892 if(write_cb(buffer, 1, len, handle) != len)
2895 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8;
2896 pack_uint32_(block->height, buffer, len);
2897 if(write_cb(buffer, 1, len, handle) != len)
2900 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8;
2901 pack_uint32_(block->depth, buffer, len);
2902 if(write_cb(buffer, 1, len, handle) != len)
2905 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8;
2906 pack_uint32_(block->colors, buffer, len);
2907 if(write_cb(buffer, 1, len, handle) != len)
2910 len = FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8;
2911 pack_uint32_(block->data_length, buffer, len);
2912 if(write_cb(buffer, 1, len, handle) != len)
2914 if(write_cb(block->data, 1, block->data_length, handle) != block->data_length)
2920 FLAC__bool write_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2922 if(write_cb(block->data, 1, block_length, handle) != block_length)
2928 FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block)
2930 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2931 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2935 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2938 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2941 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2942 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2946 return read_metadata_block_header_(iterator);
2949 FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last)
2951 FLAC__StreamMetadata *padding;
2953 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2954 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2958 block->is_last = false;
2960 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2963 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2966 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
2967 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2969 padding->is_last = padding_is_last;
2970 padding->length = padding_length;
2972 if(!write_metadata_block_header_(iterator->file, &iterator->status, padding)) {
2973 FLAC__metadata_object_delete(padding);
2977 if(!write_metadata_block_data_(iterator->file, &iterator->status, padding)) {
2978 FLAC__metadata_object_delete(padding);
2982 FLAC__metadata_object_delete(padding);
2984 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2985 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2989 return read_metadata_block_header_(iterator);
2992 FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append)
2994 FILE *tempfile = NULL;
2995 char *tempfilename = NULL;
2996 int fixup_is_last_code = 0; /* 0 => no need to change any is_last flags */
2997 FLAC__off_t fixup_is_last_flag_offset = -1;
2999 FLAC__ASSERT(0 != block || append == false);
3001 if(iterator->is_last) {
3003 fixup_is_last_code = 1; /* 1 => clear the is_last flag at the following offset */
3004 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
3006 else if(0 == block) {
3007 simple_iterator_push_(iterator);
3008 if(!FLAC__metadata_simple_iterator_prev(iterator)) {
3009 (void)simple_iterator_pop_(iterator);
3012 fixup_is_last_code = -1; /* -1 => set the is_last the flag at the following offset */
3013 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
3014 if(!simple_iterator_pop_(iterator))
3019 if(!simple_iterator_copy_file_prefix_(iterator, &tempfile, &tempfilename, append))
3023 if(!write_metadata_block_header_(tempfile, &iterator->status, block)) {
3024 cleanup_tempfile_(&tempfile, &tempfilename);
3028 if(!write_metadata_block_data_(tempfile, &iterator->status, block)) {
3029 cleanup_tempfile_(&tempfile, &tempfilename);
3034 if(!simple_iterator_copy_file_postfix_(iterator, &tempfile, &tempfilename, fixup_is_last_code, fixup_is_last_flag_offset, block==0))
3038 return FLAC__metadata_simple_iterator_next(iterator);
3043 void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator)
3045 FLAC__ASSERT(iterator->depth+1 < SIMPLE_ITERATOR_MAX_PUSH_DEPTH);
3046 iterator->offset[iterator->depth+1] = iterator->offset[iterator->depth];
3050 FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator)
3052 FLAC__ASSERT(iterator->depth > 0);
3054 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
3055 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3059 return read_metadata_block_header_(iterator);
3066 * 3: not a FLAC file
3068 unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb)
3070 FLAC__byte buffer[4];
3074 FLAC__ASSERT(FLAC__STREAM_SYNC_LENGTH == sizeof(buffer));
3076 /* skip any id3v2 tag */
3078 n = read_cb(buffer, 1, 4, handle);
3083 else if(0 == memcmp(buffer, "ID3", 3)) {
3084 unsigned tag_length = 0;
3086 /* skip to the tag length */
3087 if(seek_cb(handle, 2, SEEK_CUR) < 0)
3090 /* read the length */
3091 for(i = 0; i < 4; i++) {
3092 if(read_cb(buffer, 1, 1, handle) < 1 || buffer[0] & 0x80)
3095 tag_length |= (buffer[0] & 0x7f);
3098 /* skip the rest of the tag */
3099 if(seek_cb(handle, tag_length, SEEK_CUR) < 0)
3102 /* read the stream sync code */
3104 n = read_cb(buffer, 1, 4, handle);
3111 /* check for the fLaC signature */
3112 if(0 == memcmp(FLAC__STREAM_SYNC_STRING, buffer, FLAC__STREAM_SYNC_LENGTH))
3118 unsigned seek_to_first_metadata_block_(FILE *f)
3120 return seek_to_first_metadata_block_cb_((FLAC__IOHandle)f, (FLAC__IOCallback_Read)fread, fseek_wrapper_);
3123 FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append)
3125 const FLAC__off_t offset_end = append? iterator->offset[iterator->depth] + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length : iterator->offset[iterator->depth];
3127 if(0 != fseeko(iterator->file, 0, SEEK_SET)) {
3128 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3131 if(!open_tempfile_(iterator->filename, iterator->tempfile_path_prefix, tempfile, tempfilename, &iterator->status)) {
3132 cleanup_tempfile_(tempfile, tempfilename);
3135 if(!copy_n_bytes_from_file_(iterator->file, *tempfile, offset_end, &iterator->status)) {
3136 cleanup_tempfile_(tempfile, tempfilename);
3143 FLAC__bool simple_iterator_copy_file_postfix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, int fixup_is_last_code, FLAC__off_t fixup_is_last_flag_offset, FLAC__bool backup)
3145 FLAC__off_t save_offset = iterator->offset[iterator->depth];
3146 FLAC__ASSERT(0 != *tempfile);
3148 if(0 != fseeko(iterator->file, save_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length, SEEK_SET)) {
3149 cleanup_tempfile_(tempfile, tempfilename);
3150 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3153 if(!copy_remaining_bytes_from_file_(iterator->file, *tempfile, &iterator->status)) {
3154 cleanup_tempfile_(tempfile, tempfilename);
3158 if(fixup_is_last_code != 0) {
3160 * if code == 1, it means a block was appended to the end so
3161 * we have to clear the is_last flag of the previous block
3162 * if code == -1, it means the last block was deleted so
3163 * we have to set the is_last flag of the previous block
3165 /* MAGIC NUMBERs here; we know the is_last flag is the high bit of the byte at this location */
3167 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3168 cleanup_tempfile_(tempfile, tempfilename);
3169 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3172 if(fread(&x, 1, 1, *tempfile) != 1) {
3173 cleanup_tempfile_(tempfile, tempfilename);
3174 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3177 if(fixup_is_last_code > 0) {
3178 FLAC__ASSERT(x & 0x80);
3182 FLAC__ASSERT(!(x & 0x80));
3185 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3186 cleanup_tempfile_(tempfile, tempfilename);
3187 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3190 if(local__fwrite(&x, 1, 1, *tempfile) != 1) {
3191 cleanup_tempfile_(tempfile, tempfilename);
3192 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3197 (void)fclose(iterator->file);
3199 if(!transport_tempfile_(iterator->filename, tempfile, tempfilename, &iterator->status))
3202 if(iterator->has_stats)
3203 set_file_stats_(iterator->filename, &iterator->stats);
3205 if(!simple_iterator_prime_input_(iterator, !iterator->is_writable))
3208 while(iterator->offset[iterator->depth] + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length < save_offset)
3209 if(!FLAC__metadata_simple_iterator_next(iterator))
3214 /* move the iterator to it's original block faster by faking a push, then doing a pop_ */
3215 FLAC__ASSERT(iterator->depth == 0);
3216 iterator->offset[0] = save_offset;
3218 return simple_iterator_pop_(iterator);
3222 FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status)
3224 FLAC__byte buffer[8192];
3227 FLAC__ASSERT(bytes >= 0);
3229 n = flac_min(sizeof(buffer), (size_t)bytes);
3230 if(fread(buffer, 1, n, file) != n) {
3231 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3234 if(local__fwrite(buffer, 1, n, tempfile) != n) {
3235 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3244 FLAC__bool copy_n_bytes_from_file_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOHandle temp_handle, FLAC__IOCallback_Write temp_write_cb, FLAC__off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status)
3246 FLAC__byte buffer[8192];
3249 FLAC__ASSERT(bytes >= 0);
3251 n = flac_min(sizeof(buffer), (size_t)bytes);
3252 if(read_cb(buffer, 1, n, handle) != n) {
3253 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3256 if(temp_write_cb(buffer, 1, n, temp_handle) != n) {
3257 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3266 FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status)
3268 FLAC__byte buffer[8192];
3271 while(!feof(file)) {
3272 n = fread(buffer, 1, sizeof(buffer), file);
3273 if(n == 0 && !feof(file)) {
3274 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3277 if(n > 0 && local__fwrite(buffer, 1, n, tempfile) != n) {
3278 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3286 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)
3288 FLAC__byte buffer[8192];
3291 while(!eof_cb(handle)) {
3292 n = read_cb(buffer, 1, sizeof(buffer), handle);
3293 if(n == 0 && !eof_cb(handle)) {
3294 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3297 if(n > 0 && temp_write_cb(buffer, 1, n, temp_handle) != n) {
3298 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3307 local_snprintf(char *str, size_t size, const char *fmt, ...)
3312 #if defined _MSC_VER
3319 #if defined _MSC_VER
3320 rc = vsnprintf_s (str, size, _TRUNCATE, fmt, va);
3323 #elif defined __MINGW32__
3324 rc = __mingw_vsnprintf (str, size, fmt, va);
3326 rc = vsnprintf (str, size, fmt, va);
3333 FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3335 static const char *tempfile_suffix = ".metadata_edit";
3336 if(0 == tempfile_path_prefix) {
3337 size_t dest_len = strlen(filename) + strlen(tempfile_suffix) + 1;
3338 if(0 == (*tempfilename = safe_malloc_(dest_len))) {
3339 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3342 local_snprintf(*tempfilename, dest_len, "%s%s", filename, tempfile_suffix);
3345 const char *p = strrchr(filename, '/');
3352 dest_len = strlen(tempfile_path_prefix) + strlen(p) + strlen(tempfile_suffix) + 2;
3354 if(0 == (*tempfilename = safe_malloc_(dest_len))) {
3355 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3358 local_snprintf(*tempfilename, dest_len, "%s/%s%s", tempfile_path_prefix, p, tempfile_suffix);
3361 if(0 == (*tempfile = flac_fopen(*tempfilename, "w+b"))) {
3362 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
3369 FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3371 FLAC__ASSERT(0 != filename);
3372 FLAC__ASSERT(0 != tempfile);
3373 FLAC__ASSERT(0 != *tempfile);
3374 FLAC__ASSERT(0 != tempfilename);
3375 FLAC__ASSERT(0 != *tempfilename);
3376 FLAC__ASSERT(0 != status);
3378 (void)fclose(*tempfile);
3381 #if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__ || defined __EMX__
3382 /* on some flavors of windows, flac_rename() will fail if the destination already exists */
3383 if(flac_unlink(filename) < 0) {
3384 cleanup_tempfile_(tempfile, tempfilename);
3385 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR;
3390 /*@@@ to fully support the tempfile_path_prefix we need to update this piece to actually copy across filesystems instead of just flac_rename(): */
3391 if(0 != flac_rename(*tempfilename, filename)) {
3392 cleanup_tempfile_(tempfile, tempfilename);
3393 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR;
3397 cleanup_tempfile_(tempfile, tempfilename);
3402 void cleanup_tempfile_(FILE **tempfile, char **tempfilename)
3404 if(0 != *tempfile) {
3405 (void)fclose(*tempfile);
3409 if(0 != *tempfilename) {
3410 (void)flac_unlink(*tempfilename);
3411 free(*tempfilename);
3416 FLAC__bool get_file_stats_(const char *filename, struct flac_stat_s *stats)
3418 FLAC__ASSERT(0 != filename);
3419 FLAC__ASSERT(0 != stats);
3420 return (0 == flac_stat(filename, stats));
3423 void set_file_stats_(const char *filename, struct flac_stat_s *stats)
3425 struct utimbuf srctime;
3427 FLAC__ASSERT(0 != filename);
3428 FLAC__ASSERT(0 != stats);
3430 srctime.actime = stats->st_atime;
3431 srctime.modtime = stats->st_mtime;
3432 (void)flac_chmod(filename, stats->st_mode);
3434 (void)flac_utime(filename, &srctime);
3437 #if !defined _MSC_VER && !defined __BORLANDC__ && !defined __MINGW32__
3438 FLAC_CHECK_RETURN(chown(filename, stats->st_uid, -1));
3439 FLAC_CHECK_RETURN(chown(filename, -1, stats->st_gid));
3443 int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence)
3445 return fseeko((FILE*)handle, (FLAC__off_t)offset, whence);
3448 FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle)
3450 return ftello((FILE*)handle);
3453 FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status)
3456 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK:
3457 return FLAC__METADATA_CHAIN_STATUS_OK;
3458 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT:
3459 return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT;
3460 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE:
3461 return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
3462 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE:
3463 return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
3464 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE:
3465 return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE;
3466 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA:
3467 return FLAC__METADATA_CHAIN_STATUS_BAD_METADATA;
3468 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR:
3469 return FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
3470 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR:
3471 return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
3472 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR:
3473 return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
3474 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR:
3475 return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR;
3476 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR:
3477 return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR;
3478 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR:
3479 return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
3480 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR:
3482 return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;