1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2001,2002,2003,2004,2005,2006,2007,2008,2009 Josh Coalson
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * - Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * - Neither the name of the Xiph.org Foundation nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 #include <sys/stat.h> /* for stat(), maybe chmod() */
43 #include "private/metadata.h"
45 #include "FLAC/assert.h"
46 #include "FLAC/stream_decoder.h"
47 #include "share/alloc.h"
48 #include "share/compat.h"
49 #include "private/macros.h"
50 #include "private/memory.h"
52 /* Alias the first (in share/alloc.h) to the second (in src/libFLAC/memory.c). */
53 #define safe_malloc_mul_2op_ safe_malloc_mul_2op_p
55 /****************************************************************************
57 * Local function declarations
59 ***************************************************************************/
61 static void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
62 static void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
63 static void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes);
64 static FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes);
65 static FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes);
66 static FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes);
68 static FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator);
69 static FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block);
70 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);
71 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);
72 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block);
73 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);
74 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);
75 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);
76 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);
77 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment *block);
78 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track);
79 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block);
80 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block);
81 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);
83 static FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
84 static FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
85 static FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
86 static FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
87 static FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block);
88 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);
89 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);
90 static FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block);
91 static FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block);
92 static FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block);
93 static FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block);
94 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);
96 static FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block);
97 static FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last);
98 static FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append);
100 static void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator);
101 static FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator);
103 static unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb);
104 static unsigned seek_to_first_metadata_block_(FILE *f);
106 static FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append);
107 static FLAC__bool simple_iterator_copy_file_postfix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, int fixup_is_last_code, off_t fixup_is_last_flag_offset, FLAC__bool backup);
109 static FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status);
110 static FLAC__bool copy_n_bytes_from_file_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOHandle temp_handle, FLAC__IOCallback_Write temp_write_cb, off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status);
111 static FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status);
112 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);
114 static FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
115 static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
116 static void cleanup_tempfile_(FILE **tempfile, char **tempfilename);
118 static FLAC__bool get_file_stats_(const char *filename, struct stat *stats);
119 static void set_file_stats_(const char *filename, struct stat *stats);
121 static int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence);
122 static FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle);
124 static FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status);
127 #ifdef FLAC__VALGRIND_TESTING
128 static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
130 size_t ret = fwrite(ptr, size, nmemb, stream);
136 #define local__fwrite fwrite
139 /****************************************************************************
141 * Level 0 implementation
143 ***************************************************************************/
145 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
146 static void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
147 static void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
150 FLAC__bool got_error;
151 FLAC__StreamMetadata *object;
152 } level0_client_data;
154 static FLAC__StreamMetadata *get_one_metadata_block_(const char *filename, FLAC__MetadataType type)
156 level0_client_data cd;
157 FLAC__StreamDecoder *decoder;
159 FLAC__ASSERT(0 != filename);
161 cd.got_error = false;
164 decoder = FLAC__stream_decoder_new();
169 FLAC__stream_decoder_set_md5_checking(decoder, false);
170 FLAC__stream_decoder_set_metadata_ignore_all(decoder);
171 FLAC__stream_decoder_set_metadata_respond(decoder, type);
173 if(FLAC__stream_decoder_init_file(decoder, filename, write_callback_, metadata_callback_, error_callback_, &cd) != FLAC__STREAM_DECODER_INIT_STATUS_OK || cd.got_error) {
174 (void)FLAC__stream_decoder_finish(decoder);
175 FLAC__stream_decoder_delete(decoder);
179 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder) || cd.got_error) {
180 (void)FLAC__stream_decoder_finish(decoder);
181 FLAC__stream_decoder_delete(decoder);
183 FLAC__metadata_object_delete(cd.object);
187 (void)FLAC__stream_decoder_finish(decoder);
188 FLAC__stream_decoder_delete(decoder);
193 FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo)
195 FLAC__StreamMetadata *object;
197 FLAC__ASSERT(0 != filename);
198 FLAC__ASSERT(0 != streaminfo);
200 object = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_STREAMINFO);
203 /* can just copy the contents since STREAMINFO has no internal structure */
204 *streaminfo = *object;
205 FLAC__metadata_object_delete(object);
213 FLAC_API FLAC__bool FLAC__metadata_get_tags(const char *filename, FLAC__StreamMetadata **tags)
215 FLAC__ASSERT(0 != filename);
216 FLAC__ASSERT(0 != tags);
218 *tags = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_VORBIS_COMMENT);
223 FLAC_API FLAC__bool FLAC__metadata_get_cuesheet(const char *filename, FLAC__StreamMetadata **cuesheet)
225 FLAC__ASSERT(0 != filename);
226 FLAC__ASSERT(0 != cuesheet);
228 *cuesheet = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_CUESHEET);
230 return 0 != *cuesheet;
233 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
235 (void)decoder, (void)frame, (void)buffer, (void)client_data;
237 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
240 void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
242 level0_client_data *cd = (level0_client_data *)client_data;
246 * we assume we only get here when the one metadata block we were
247 * looking for was passed to us
249 if(!cd->got_error && 0 == cd->object) {
250 if(0 == (cd->object = FLAC__metadata_object_clone(metadata)))
251 cd->got_error = true;
255 void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
257 level0_client_data *cd = (level0_client_data *)client_data;
260 if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
261 cd->got_error = true;
264 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)
266 FLAC__Metadata_SimpleIterator *it;
267 FLAC__uint64 max_area_seen = 0;
268 FLAC__uint64 max_depth_seen = 0;
270 FLAC__ASSERT(0 != filename);
271 FLAC__ASSERT(0 != picture);
275 it = FLAC__metadata_simple_iterator_new();
278 if(!FLAC__metadata_simple_iterator_init(it, filename, /*read_only=*/true, /*preserve_file_stats=*/true)) {
279 FLAC__metadata_simple_iterator_delete(it);
283 if(FLAC__metadata_simple_iterator_get_block_type(it) == FLAC__METADATA_TYPE_PICTURE) {
284 FLAC__StreamMetadata *obj = FLAC__metadata_simple_iterator_get_block(it);
285 FLAC__uint64 area = (FLAC__uint64)obj->data.picture.width * (FLAC__uint64)obj->data.picture.height;
286 /* check constraints */
288 (type == (FLAC__StreamMetadata_Picture_Type)(-1) || type == obj->data.picture.type) &&
289 (mime_type == 0 || !strcmp(mime_type, obj->data.picture.mime_type)) &&
290 (description == 0 || !strcmp((const char *)description, (const char *)obj->data.picture.description)) &&
291 obj->data.picture.width <= max_width &&
292 obj->data.picture.height <= max_height &&
293 obj->data.picture.depth <= max_depth &&
294 obj->data.picture.colors <= max_colors &&
295 (area > max_area_seen || (area == max_area_seen && obj->data.picture.depth > max_depth_seen))
298 FLAC__metadata_object_delete(*picture);
300 max_area_seen = area;
301 max_depth_seen = obj->data.picture.depth;
304 FLAC__metadata_object_delete(obj);
307 } while(FLAC__metadata_simple_iterator_next(it));
309 FLAC__metadata_simple_iterator_delete(it);
311 return (0 != *picture);
315 /****************************************************************************
317 * Level 1 implementation
319 ***************************************************************************/
321 #define SIMPLE_ITERATOR_MAX_PUSH_DEPTH (1+4)
322 /* 1 for initial offset, +4 for our own personal use */
324 struct FLAC__Metadata_SimpleIterator {
326 char *filename, *tempfile_path_prefix;
328 FLAC__bool has_stats;
329 FLAC__bool is_writable;
330 FLAC__Metadata_SimpleIteratorStatus status;
331 off_t offset[SIMPLE_ITERATOR_MAX_PUSH_DEPTH];
332 off_t first_offset; /* this is the offset to the STREAMINFO block */
334 /* this is the metadata block header of the current block we are pointing to: */
336 FLAC__MetadataType type;
340 FLAC_API const char * const FLAC__Metadata_SimpleIteratorStatusString[] = {
341 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK",
342 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT",
343 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE",
344 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE",
345 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE",
346 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA",
347 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR",
348 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR",
349 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR",
350 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR",
351 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR",
352 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR",
353 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR"
357 FLAC_API FLAC__Metadata_SimpleIterator *FLAC__metadata_simple_iterator_new(void)
359 FLAC__Metadata_SimpleIterator *iterator = calloc(1, sizeof(FLAC__Metadata_SimpleIterator));
363 iterator->filename = 0;
364 iterator->tempfile_path_prefix = 0;
365 iterator->has_stats = false;
366 iterator->is_writable = false;
367 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
368 iterator->first_offset = iterator->offset[0] = -1;
375 static void simple_iterator_free_guts_(FLAC__Metadata_SimpleIterator *iterator)
377 FLAC__ASSERT(0 != iterator);
379 if(0 != iterator->file) {
380 fclose(iterator->file);
382 if(iterator->has_stats)
383 set_file_stats_(iterator->filename, &iterator->stats);
385 if(0 != iterator->filename) {
386 free(iterator->filename);
387 iterator->filename = 0;
389 if(0 != iterator->tempfile_path_prefix) {
390 free(iterator->tempfile_path_prefix);
391 iterator->tempfile_path_prefix = 0;
395 FLAC_API void FLAC__metadata_simple_iterator_delete(FLAC__Metadata_SimpleIterator *iterator)
397 FLAC__ASSERT(0 != iterator);
399 simple_iterator_free_guts_(iterator);
403 FLAC_API FLAC__Metadata_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__Metadata_SimpleIterator *iterator)
405 FLAC__Metadata_SimpleIteratorStatus status;
407 FLAC__ASSERT(0 != iterator);
409 status = iterator->status;
410 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
414 static FLAC__bool simple_iterator_prime_input_(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool read_only)
418 FLAC__ASSERT(0 != iterator);
420 if(read_only || 0 == (iterator->file = fopen(iterator->filename, "r+b"))) {
421 iterator->is_writable = false;
422 if(read_only || errno == EACCES) {
423 if(0 == (iterator->file = fopen(iterator->filename, "rb"))) {
424 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
429 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
434 iterator->is_writable = true;
437 ret = seek_to_first_metadata_block_(iterator->file);
441 iterator->first_offset = iterator->offset[iterator->depth] = ftello(iterator->file);
442 return read_metadata_block_header_(iterator);
444 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
447 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
450 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE;
459 @@@ If we decide to finish implementing this, put this comment back in metadata.h
461 * The 'tempfile_path_prefix' allows you to specify a directory where
462 * tempfiles should go. Remember that if your metadata edits cause the
463 * FLAC file to grow, the entire file will have to be rewritten. If
464 * 'tempfile_path_prefix' is NULL, the temp file will be written in the
465 * same directory as the original FLAC file. This makes replacing the
466 * original with the tempfile fast but requires extra space in the same
467 * partition for the tempfile. If space is a problem, you can pass a
468 * directory name belonging to a different partition in
469 * 'tempfile_path_prefix'. Note that you should use the forward slash
470 * '/' as the directory separator. A trailing slash is not needed; it
471 * will be added automatically.
473 FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats, const char *tempfile_path_prefix);
476 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)
478 const char *tempfile_path_prefix = 0; /*@@@ search for comments near 'rename(...)' for what it will take to finish implementing this */
480 FLAC__ASSERT(0 != iterator);
481 FLAC__ASSERT(0 != filename);
483 simple_iterator_free_guts_(iterator);
485 if(!read_only && preserve_file_stats)
486 iterator->has_stats = get_file_stats_(filename, &iterator->stats);
488 if(0 == (iterator->filename = strdup(filename))) {
489 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
492 if(0 != tempfile_path_prefix && 0 == (iterator->tempfile_path_prefix = strdup(tempfile_path_prefix))) {
493 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
497 return simple_iterator_prime_input_(iterator, read_only);
500 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__Metadata_SimpleIterator *iterator)
502 FLAC__ASSERT(0 != iterator);
503 FLAC__ASSERT(0 != iterator->file);
505 return iterator->is_writable;
508 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__Metadata_SimpleIterator *iterator)
510 FLAC__ASSERT(0 != iterator);
511 FLAC__ASSERT(0 != iterator->file);
513 if(iterator->is_last)
516 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
517 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
521 iterator->offset[iterator->depth] = ftello(iterator->file);
523 return read_metadata_block_header_(iterator);
526 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__Metadata_SimpleIterator *iterator)
530 FLAC__ASSERT(0 != iterator);
531 FLAC__ASSERT(0 != iterator->file);
533 if(iterator->offset[iterator->depth] == iterator->first_offset)
536 if(0 != fseeko(iterator->file, iterator->first_offset, SEEK_SET)) {
537 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
540 this_offset = iterator->first_offset;
541 if(!read_metadata_block_header_(iterator))
544 /* we ignore any error from ftello() and catch it in fseeko() */
545 while(ftello(iterator->file) + (off_t)iterator->length < iterator->offset[iterator->depth]) {
546 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
547 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
550 this_offset = ftello(iterator->file);
551 if(!read_metadata_block_header_(iterator))
555 iterator->offset[iterator->depth] = this_offset;
561 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_last(const FLAC__Metadata_SimpleIterator *iterator)
563 FLAC__ASSERT(0 != iterator);
564 FLAC__ASSERT(0 != iterator->file);
566 return iterator->is_last;
570 FLAC_API off_t FLAC__metadata_simple_iterator_get_block_offset(const FLAC__Metadata_SimpleIterator *iterator)
572 FLAC__ASSERT(0 != iterator);
573 FLAC__ASSERT(0 != iterator->file);
575 return iterator->offset[iterator->depth];
578 FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator)
580 FLAC__ASSERT(0 != iterator);
581 FLAC__ASSERT(0 != iterator->file);
583 return iterator->type;
587 FLAC_API unsigned FLAC__metadata_simple_iterator_get_block_length(const FLAC__Metadata_SimpleIterator *iterator)
589 FLAC__ASSERT(0 != iterator);
590 FLAC__ASSERT(0 != iterator->file);
592 return iterator->length;
596 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_get_application_id(FLAC__Metadata_SimpleIterator *iterator, FLAC__byte *id)
598 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
600 FLAC__ASSERT(0 != iterator);
601 FLAC__ASSERT(0 != iterator->file);
602 FLAC__ASSERT(0 != id);
604 if(iterator->type != FLAC__METADATA_TYPE_APPLICATION) {
605 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
609 if(fread(id, 1, id_bytes, iterator->file) != id_bytes) {
610 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
615 if(0 != fseeko(iterator->file, -((int)id_bytes), SEEK_CUR)) {
616 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
623 FLAC_API FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator)
625 FLAC__StreamMetadata *block = FLAC__metadata_object_new(iterator->type);
627 FLAC__ASSERT(0 != iterator);
628 FLAC__ASSERT(0 != iterator->file);
631 block->is_last = iterator->is_last;
632 block->length = iterator->length;
634 if(!read_metadata_block_data_(iterator, block)) {
635 FLAC__metadata_object_delete(block);
639 /* back up to the beginning of the block data to stay consistent */
640 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH, SEEK_SET)) {
641 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
642 FLAC__metadata_object_delete(block);
647 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
652 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
654 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth];)
657 FLAC__ASSERT(0 != iterator);
658 FLAC__ASSERT(0 != iterator->file);
659 FLAC__ASSERT(0 != block);
661 if(!iterator->is_writable) {
662 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
666 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO || block->type == FLAC__METADATA_TYPE_STREAMINFO) {
667 if(iterator->type != block->type) {
668 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
673 block->is_last = iterator->is_last;
675 if(iterator->length == block->length)
676 return write_metadata_block_stationary_(iterator, block);
677 else if(iterator->length > block->length) {
678 if(use_padding && iterator->length >= FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) {
679 ret = write_metadata_block_stationary_with_padding_(iterator, block, iterator->length - FLAC__STREAM_METADATA_HEADER_LENGTH - block->length, block->is_last);
680 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
681 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
685 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
686 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
687 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
691 else /* iterator->length < block->length */ {
692 unsigned padding_leftover = 0;
693 FLAC__bool padding_is_last = false;
695 /* first see if we can even use padding */
696 if(iterator->is_last) {
700 const unsigned extra_padding_bytes_required = block->length - iterator->length;
701 simple_iterator_push_(iterator);
702 if(!FLAC__metadata_simple_iterator_next(iterator)) {
703 (void)simple_iterator_pop_(iterator);
706 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
710 if(FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length == extra_padding_bytes_required) {
711 padding_leftover = 0;
712 block->is_last = iterator->is_last;
714 else if(iterator->length < extra_padding_bytes_required)
717 padding_leftover = FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length - extra_padding_bytes_required;
718 padding_is_last = iterator->is_last;
719 block->is_last = false;
722 if(!simple_iterator_pop_(iterator))
727 if(padding_leftover == 0) {
728 ret = write_metadata_block_stationary_(iterator, block);
729 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
730 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
734 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
735 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
736 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
737 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
742 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
743 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
744 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
750 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
752 unsigned padding_leftover = 0;
753 FLAC__bool padding_is_last = false;
755 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length;)
758 FLAC__ASSERT(0 != iterator);
759 FLAC__ASSERT(0 != iterator->file);
760 FLAC__ASSERT(0 != block);
762 if(!iterator->is_writable)
765 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
766 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
770 block->is_last = iterator->is_last;
773 /* first see if we can even use padding */
774 if(iterator->is_last) {
778 simple_iterator_push_(iterator);
779 if(!FLAC__metadata_simple_iterator_next(iterator)) {
780 (void)simple_iterator_pop_(iterator);
783 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
787 if(iterator->length == block->length) {
788 padding_leftover = 0;
789 block->is_last = iterator->is_last;
791 else if(iterator->length < FLAC__STREAM_METADATA_HEADER_LENGTH + block->length)
794 padding_leftover = iterator->length - block->length;
795 padding_is_last = iterator->is_last;
796 block->is_last = false;
799 if(!simple_iterator_pop_(iterator))
804 /* move to the next block, which is suitable padding */
805 if(!FLAC__metadata_simple_iterator_next(iterator))
807 if(padding_leftover == 0) {
808 ret = write_metadata_block_stationary_(iterator, block);
809 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
810 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
814 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
815 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
816 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
817 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
822 ret = rewrite_whole_file_(iterator, block, /*append=*/true);
823 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
824 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
829 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool use_padding)
831 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth];)
834 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO) {
835 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
840 FLAC__StreamMetadata *padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
842 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
845 padding->length = iterator->length;
846 if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false)) {
847 FLAC__metadata_object_delete(padding);
850 FLAC__metadata_object_delete(padding);
851 if(!FLAC__metadata_simple_iterator_prev(iterator))
853 FLAC__ASSERT(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length == debug_target_offset);
854 FLAC__ASSERT(ftello(iterator->file) + (off_t)iterator->length == debug_target_offset);
858 ret = rewrite_whole_file_(iterator, 0, /*append=*/false);
859 FLAC__ASSERT(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length == debug_target_offset);
860 FLAC__ASSERT(ftello(iterator->file) + (off_t)iterator->length == debug_target_offset);
867 /****************************************************************************
869 * Level 2 implementation
871 ***************************************************************************/
874 typedef struct FLAC__Metadata_Node {
875 FLAC__StreamMetadata *data;
876 struct FLAC__Metadata_Node *prev, *next;
877 } FLAC__Metadata_Node;
879 struct FLAC__Metadata_Chain {
880 char *filename; /* will be NULL if using callbacks */
882 FLAC__Metadata_Node *head;
883 FLAC__Metadata_Node *tail;
885 FLAC__Metadata_ChainStatus status;
886 off_t first_offset, last_offset;
888 * This is the length of the chain initially read from the FLAC file.
889 * it is used to compare against the current length to decide whether
890 * or not the whole file has to be rewritten.
892 off_t initial_length;
893 /* @@@ hacky, these are currently only needed by ogg reader */
894 FLAC__IOHandle handle;
895 FLAC__IOCallback_Read read_cb;
898 struct FLAC__Metadata_Iterator {
899 FLAC__Metadata_Chain *chain;
900 FLAC__Metadata_Node *current;
903 FLAC_API const char * const FLAC__Metadata_ChainStatusString[] = {
904 "FLAC__METADATA_CHAIN_STATUS_OK",
905 "FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT",
906 "FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE",
907 "FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE",
908 "FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE",
909 "FLAC__METADATA_CHAIN_STATUS_BAD_METADATA",
910 "FLAC__METADATA_CHAIN_STATUS_READ_ERROR",
911 "FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR",
912 "FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR",
913 "FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR",
914 "FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR",
915 "FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR",
916 "FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR",
917 "FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS",
918 "FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH",
919 "FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL"
923 static FLAC__Metadata_Node *node_new_(void)
925 return calloc(1, sizeof(FLAC__Metadata_Node));
928 static void node_delete_(FLAC__Metadata_Node *node)
930 FLAC__ASSERT(0 != node);
932 FLAC__metadata_object_delete(node->data);
936 static void chain_init_(FLAC__Metadata_Chain *chain)
938 FLAC__ASSERT(0 != chain);
941 chain->is_ogg = false;
942 chain->head = chain->tail = 0;
944 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
945 chain->initial_length = 0;
949 static void chain_clear_(FLAC__Metadata_Chain *chain)
951 FLAC__Metadata_Node *node, *next;
953 FLAC__ASSERT(0 != chain);
955 for(node = chain->head; node; ) {
961 if(0 != chain->filename)
962 free(chain->filename);
967 static void chain_append_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
969 FLAC__ASSERT(0 != chain);
970 FLAC__ASSERT(0 != node);
971 FLAC__ASSERT(0 != node->data);
973 node->next = node->prev = 0;
974 node->data->is_last = true;
976 chain->tail->data->is_last = false;
981 FLAC__ASSERT(0 != chain->tail);
982 chain->tail->next = node;
983 node->prev = chain->tail;
989 static void chain_remove_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
991 FLAC__ASSERT(0 != chain);
992 FLAC__ASSERT(0 != node);
994 if(node == chain->head)
995 chain->head = node->next;
997 node->prev->next = node->next;
999 if(node == chain->tail)
1000 chain->tail = node->prev;
1002 node->next->prev = node->prev;
1004 if(0 != chain->tail)
1005 chain->tail->data->is_last = true;
1010 static void chain_delete_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1012 chain_remove_node_(chain, node);
1016 static off_t chain_calculate_length_(FLAC__Metadata_Chain *chain)
1018 const FLAC__Metadata_Node *node;
1020 for(node = chain->head; node; node = node->next)
1021 length += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1025 static void iterator_insert_node_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1027 FLAC__ASSERT(0 != node);
1028 FLAC__ASSERT(0 != node->data);
1029 FLAC__ASSERT(0 != iterator);
1030 FLAC__ASSERT(0 != iterator->current);
1031 FLAC__ASSERT(0 != iterator->chain);
1032 FLAC__ASSERT(0 != iterator->chain->head);
1033 FLAC__ASSERT(0 != iterator->chain->tail);
1035 node->data->is_last = false;
1037 node->prev = iterator->current->prev;
1038 node->next = iterator->current;
1041 iterator->chain->head = node;
1043 node->prev->next = node;
1045 iterator->current->prev = node;
1047 iterator->chain->nodes++;
1050 static void iterator_insert_node_after_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1052 FLAC__ASSERT(0 != node);
1053 FLAC__ASSERT(0 != node->data);
1054 FLAC__ASSERT(0 != iterator);
1055 FLAC__ASSERT(0 != iterator->current);
1056 FLAC__ASSERT(0 != iterator->chain);
1057 FLAC__ASSERT(0 != iterator->chain->head);
1058 FLAC__ASSERT(0 != iterator->chain->tail);
1060 iterator->current->data->is_last = false;
1062 node->prev = iterator->current;
1063 node->next = iterator->current->next;
1066 iterator->chain->tail = node;
1068 node->next->prev = node;
1070 node->prev->next = node;
1072 iterator->chain->tail->data->is_last = true;
1074 iterator->chain->nodes++;
1077 /* return true iff node and node->next are both padding */
1078 static FLAC__bool chain_merge_adjacent_padding_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1080 if(node->data->type == FLAC__METADATA_TYPE_PADDING && 0 != node->next && node->next->data->type == FLAC__METADATA_TYPE_PADDING) {
1081 const unsigned growth = FLAC__STREAM_METADATA_HEADER_LENGTH + node->next->data->length;
1082 node->data->length += growth;
1084 chain_delete_node_(chain, node->next);
1091 /* Returns the new length of the chain, or 0 if there was an error. */
1092 /* WATCHOUT: This can get called multiple times before a write, so
1093 * it should still work when this happens.
1095 /* WATCHOUT: Make sure to also update the logic in
1096 * FLAC__metadata_chain_check_if_tempfile_needed() if the logic here changes.
1098 static off_t chain_prepare_for_write_(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1100 off_t current_length = chain_calculate_length_(chain);
1103 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1104 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1105 const off_t delta = chain->initial_length - current_length;
1106 chain->tail->data->length += delta;
1107 current_length += delta;
1108 FLAC__ASSERT(current_length == chain->initial_length);
1110 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1111 else if(current_length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) {
1112 FLAC__StreamMetadata *padding;
1113 FLAC__Metadata_Node *node;
1114 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) {
1115 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1118 padding->length = chain->initial_length - (FLAC__STREAM_METADATA_HEADER_LENGTH + current_length);
1119 if(0 == (node = node_new_())) {
1120 FLAC__metadata_object_delete(padding);
1121 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1124 node->data = padding;
1125 chain_append_node_(chain, node);
1126 current_length = chain_calculate_length_(chain);
1127 FLAC__ASSERT(current_length == chain->initial_length);
1129 /* 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 */
1130 else if(current_length > chain->initial_length) {
1131 const off_t delta = current_length - chain->initial_length;
1132 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1133 /* if the delta is exactly the size of the last padding block, remove the padding block */
1134 if((off_t)chain->tail->data->length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta) {
1135 chain_delete_node_(chain, chain->tail);
1136 current_length = chain_calculate_length_(chain);
1137 FLAC__ASSERT(current_length == chain->initial_length);
1139 /* if there is at least 'delta' bytes of padding, trim the padding down */
1140 else if((off_t)chain->tail->data->length >= delta) {
1141 chain->tail->data->length -= delta;
1142 current_length -= delta;
1143 FLAC__ASSERT(current_length == chain->initial_length);
1149 return current_length;
1152 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)
1154 FLAC__Metadata_Node *node;
1156 FLAC__ASSERT(0 != chain);
1158 /* we assume we're already at the beginning of the file */
1160 switch(seek_to_first_metadata_block_cb_(handle, read_cb, seek_cb)) {
1164 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1167 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1170 chain->status = FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
1178 FLAC__int64 pos = tell_cb(handle);
1180 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1183 chain->first_offset = (off_t)pos;
1188 FLAC__MetadataType type;
1194 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1198 if(!read_metadata_block_header_cb_(handle, read_cb, &is_last, &type, &length)) {
1200 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1204 node->data = FLAC__metadata_object_new(type);
1205 if(0 == node->data) {
1207 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1211 node->data->is_last = is_last;
1212 node->data->length = length;
1214 chain->status = get_equivalent_status_(read_metadata_block_data_cb_(handle, read_cb, seek_cb, node->data));
1215 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1219 chain_append_node_(chain, node);
1224 FLAC__int64 pos = tell_cb(handle);
1226 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1229 chain->last_offset = (off_t)pos;
1232 chain->initial_length = chain_calculate_length_(chain);
1237 static FLAC__StreamDecoderReadStatus chain_read_ogg_read_cb_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
1239 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1241 if(*bytes > 0 && chain->status == FLAC__METADATA_CHAIN_STATUS_OK) {
1242 *bytes = chain->read_cb(buffer, sizeof(FLAC__byte), *bytes, chain->handle);
1244 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
1246 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
1249 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
1252 static FLAC__StreamDecoderWriteStatus chain_read_ogg_write_cb_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
1254 (void)decoder, (void)frame, (void)buffer, (void)client_data;
1255 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1258 static void chain_read_ogg_metadata_cb_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
1260 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1261 FLAC__Metadata_Node *node;
1267 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1271 node->data = FLAC__metadata_object_clone(metadata);
1272 if(0 == node->data) {
1274 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1278 chain_append_node_(chain, node);
1281 static void chain_read_ogg_error_cb_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1283 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1284 (void)decoder, (void)status;
1285 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1288 static FLAC__bool chain_read_ogg_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb)
1290 FLAC__StreamDecoder *decoder;
1292 FLAC__ASSERT(0 != chain);
1294 /* we assume we're already at the beginning of the file */
1296 chain->handle = handle;
1297 chain->read_cb = read_cb;
1298 if(0 == (decoder = FLAC__stream_decoder_new())) {
1299 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1302 FLAC__stream_decoder_set_metadata_respond_all(decoder);
1303 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) {
1304 FLAC__stream_decoder_delete(decoder);
1305 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1309 chain->first_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1311 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder))
1312 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1313 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1314 FLAC__stream_decoder_delete(decoder);
1318 FLAC__stream_decoder_delete(decoder);
1320 chain->last_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1322 chain->initial_length = chain_calculate_length_(chain);
1327 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)
1329 FLAC__Metadata_Node *node;
1331 FLAC__ASSERT(0 != chain);
1332 FLAC__ASSERT(0 != chain->head);
1334 if(0 != seek_cb(handle, chain->first_offset, SEEK_SET)) {
1335 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1339 for(node = chain->head; node; node = node->next) {
1340 if(!write_metadata_block_header_cb_(handle, write_cb, node->data)) {
1341 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1344 if(!write_metadata_block_data_cb_(handle, write_cb, node->data)) {
1345 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1350 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1352 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1356 static FLAC__bool chain_rewrite_metadata_in_place_(FLAC__Metadata_Chain *chain)
1361 FLAC__ASSERT(0 != chain->filename);
1363 if(0 == (file = fopen(chain->filename, "r+b"))) {
1364 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1368 /* chain_rewrite_metadata_in_place_cb_() sets chain->status for us */
1369 ret = chain_rewrite_metadata_in_place_cb_(chain, (FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, fseek_wrapper_);
1376 static FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix)
1380 FLAC__Metadata_SimpleIteratorStatus status;
1381 const FLAC__Metadata_Node *node;
1383 FLAC__ASSERT(0 != chain);
1384 FLAC__ASSERT(0 != chain->filename);
1385 FLAC__ASSERT(0 != chain->head);
1387 /* copy the file prefix (data up to first metadata block */
1388 if(0 == (f = fopen(chain->filename, "rb"))) {
1389 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1392 if(!open_tempfile_(chain->filename, tempfile_path_prefix, &tempfile, &tempfilename, &status)) {
1393 chain->status = get_equivalent_status_(status);
1396 if(!copy_n_bytes_from_file_(f, tempfile, chain->first_offset, &status)) {
1397 chain->status = get_equivalent_status_(status);
1401 /* write the metadata */
1402 for(node = chain->head; node; node = node->next) {
1403 if(!write_metadata_block_header_(tempfile, &status, node->data)) {
1404 chain->status = get_equivalent_status_(status);
1407 if(!write_metadata_block_data_(tempfile, &status, node->data)) {
1408 chain->status = get_equivalent_status_(status);
1412 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1414 /* copy the file postfix (everything after the metadata) */
1415 if(0 != fseeko(f, chain->last_offset, SEEK_SET)) {
1416 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1419 if(!copy_remaining_bytes_from_file_(f, tempfile, &status)) {
1420 chain->status = get_equivalent_status_(status);
1424 /* move the tempfile on top of the original */
1426 if(!transport_tempfile_(chain->filename, &tempfile, &tempfilename, &status))
1433 cleanup_tempfile_(&tempfile, &tempfilename);
1437 /* assumes 'handle' is already at beginning of file */
1438 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)
1440 FLAC__Metadata_SimpleIteratorStatus status;
1441 const FLAC__Metadata_Node *node;
1443 FLAC__ASSERT(0 != chain);
1444 FLAC__ASSERT(0 == chain->filename);
1445 FLAC__ASSERT(0 != chain->head);
1447 /* copy the file prefix (data up to first metadata block */
1448 if(!copy_n_bytes_from_file_cb_(handle, read_cb, temp_handle, temp_write_cb, chain->first_offset, &status)) {
1449 chain->status = get_equivalent_status_(status);
1453 /* write the metadata */
1454 for(node = chain->head; node; node = node->next) {
1455 if(!write_metadata_block_header_cb_(temp_handle, temp_write_cb, node->data)) {
1456 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1459 if(!write_metadata_block_data_cb_(temp_handle, temp_write_cb, node->data)) {
1460 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1464 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1466 /* copy the file postfix (everything after the metadata) */
1467 if(0 != seek_cb(handle, chain->last_offset, SEEK_SET)) {
1468 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1471 if(!copy_remaining_bytes_from_file_cb_(handle, read_cb, eof_cb, temp_handle, temp_write_cb, &status)) {
1472 chain->status = get_equivalent_status_(status);
1479 FLAC_API FLAC__Metadata_Chain *FLAC__metadata_chain_new(void)
1481 FLAC__Metadata_Chain *chain = calloc(1, sizeof(FLAC__Metadata_Chain));
1489 FLAC_API void FLAC__metadata_chain_delete(FLAC__Metadata_Chain *chain)
1491 FLAC__ASSERT(0 != chain);
1493 chain_clear_(chain);
1498 FLAC_API FLAC__Metadata_ChainStatus FLAC__metadata_chain_status(FLAC__Metadata_Chain *chain)
1500 FLAC__Metadata_ChainStatus status;
1502 FLAC__ASSERT(0 != chain);
1504 status = chain->status;
1505 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1509 static FLAC__bool chain_read_(FLAC__Metadata_Chain *chain, const char *filename, FLAC__bool is_ogg)
1514 FLAC__ASSERT(0 != chain);
1515 FLAC__ASSERT(0 != filename);
1517 chain_clear_(chain);
1519 if(0 == (chain->filename = strdup(filename))) {
1520 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1524 chain->is_ogg = is_ogg;
1526 if(0 == (file = fopen(filename, "rb"))) {
1527 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1531 /* the function also sets chain->status for us */
1533 chain_read_ogg_cb_(chain, file, (FLAC__IOCallback_Read)fread) :
1534 chain_read_cb_(chain, file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, ftell_wrapper_)
1542 FLAC_API FLAC__bool FLAC__metadata_chain_read(FLAC__Metadata_Chain *chain, const char *filename)
1544 return chain_read_(chain, filename, /*is_ogg=*/false);
1547 /*@@@@add to tests*/
1548 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg(FLAC__Metadata_Chain *chain, const char *filename)
1550 return chain_read_(chain, filename, /*is_ogg=*/true);
1553 static FLAC__bool chain_read_with_callbacks_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks, FLAC__bool is_ogg)
1557 FLAC__ASSERT(0 != chain);
1559 chain_clear_(chain);
1561 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.tell) {
1562 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1566 chain->is_ogg = is_ogg;
1569 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1570 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1574 /* the function also sets chain->status for us */
1576 chain_read_ogg_cb_(chain, handle, callbacks.read) :
1577 chain_read_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.tell)
1583 FLAC_API FLAC__bool FLAC__metadata_chain_read_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1585 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/false);
1588 /*@@@@add to tests*/
1589 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1591 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/true);
1594 FLAC_API FLAC__bool FLAC__metadata_chain_check_if_tempfile_needed(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1596 /* This does all the same checks that are in chain_prepare_for_write_()
1597 * but doesn't actually alter the chain. Make sure to update the logic
1598 * here if chain_prepare_for_write_() changes.
1600 const off_t current_length = chain_calculate_length_(chain);
1602 FLAC__ASSERT(0 != chain);
1605 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1606 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING)
1608 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1609 else if(current_length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length)
1611 /* 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 */
1612 else if(current_length > chain->initial_length) {
1613 const off_t delta = current_length - chain->initial_length;
1614 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1615 /* if the delta is exactly the size of the last padding block, remove the padding block */
1616 if((off_t)chain->tail->data->length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta)
1618 /* if there is at least 'delta' bytes of padding, trim the padding down */
1619 else if((off_t)chain->tail->data->length >= delta)
1625 return (current_length != chain->initial_length);
1628 FLAC_API FLAC__bool FLAC__metadata_chain_write(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats)
1631 const char *tempfile_path_prefix = 0;
1632 off_t current_length;
1634 FLAC__ASSERT(0 != chain);
1636 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1637 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1641 if (0 == chain->filename) {
1642 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1646 current_length = chain_prepare_for_write_(chain, use_padding);
1648 /* a return value of 0 means there was an error; chain->status is already set */
1649 if (0 == current_length)
1652 if(preserve_file_stats)
1653 get_file_stats_(chain->filename, &stats);
1655 if(current_length == chain->initial_length) {
1656 if(!chain_rewrite_metadata_in_place_(chain))
1660 if(!chain_rewrite_file_(chain, tempfile_path_prefix))
1663 /* recompute lengths and offsets */
1665 const FLAC__Metadata_Node *node;
1666 chain->initial_length = current_length;
1667 chain->last_offset = chain->first_offset;
1668 for(node = chain->head; node; node = node->next)
1669 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1673 if(preserve_file_stats)
1674 set_file_stats_(chain->filename, &stats);
1679 FLAC_API FLAC__bool FLAC__metadata_chain_write_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1681 off_t current_length;
1683 FLAC__ASSERT(0 != chain);
1685 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1686 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1690 if (0 != chain->filename) {
1691 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1695 if (0 == callbacks.write || 0 == callbacks.seek) {
1696 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1700 if (FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1701 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1705 current_length = chain_prepare_for_write_(chain, use_padding);
1707 /* a return value of 0 means there was an error; chain->status is already set */
1708 if (0 == current_length)
1711 FLAC__ASSERT(current_length == chain->initial_length);
1713 return chain_rewrite_metadata_in_place_cb_(chain, handle, callbacks.write, callbacks.seek);
1716 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)
1718 off_t current_length;
1720 FLAC__ASSERT(0 != chain);
1722 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1723 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1727 if (0 != chain->filename) {
1728 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1732 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.eof) {
1733 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1736 if (0 == temp_callbacks.write) {
1737 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1741 if (!FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1742 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1746 current_length = chain_prepare_for_write_(chain, use_padding);
1748 /* a return value of 0 means there was an error; chain->status is already set */
1749 if (0 == current_length)
1752 FLAC__ASSERT(current_length != chain->initial_length);
1755 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1756 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1760 if(!chain_rewrite_file_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.eof, temp_handle, temp_callbacks.write))
1763 /* recompute lengths and offsets */
1765 const FLAC__Metadata_Node *node;
1766 chain->initial_length = current_length;
1767 chain->last_offset = chain->first_offset;
1768 for(node = chain->head; node; node = node->next)
1769 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1775 FLAC_API void FLAC__metadata_chain_merge_padding(FLAC__Metadata_Chain *chain)
1777 FLAC__Metadata_Node *node;
1779 FLAC__ASSERT(0 != chain);
1781 for(node = chain->head; node; ) {
1782 if(!chain_merge_adjacent_padding_(chain, node))
1787 FLAC_API void FLAC__metadata_chain_sort_padding(FLAC__Metadata_Chain *chain)
1789 FLAC__Metadata_Node *node, *save;
1792 FLAC__ASSERT(0 != chain);
1795 * Don't try and be too smart... this simple algo is good enough for
1796 * the small number of nodes that we deal with.
1798 for(i = 0, node = chain->head; i < chain->nodes; i++) {
1799 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1801 chain_remove_node_(chain, node);
1802 chain_append_node_(chain, node);
1810 FLAC__metadata_chain_merge_padding(chain);
1814 FLAC_API FLAC__Metadata_Iterator *FLAC__metadata_iterator_new(void)
1816 FLAC__Metadata_Iterator *iterator = calloc(1, sizeof(FLAC__Metadata_Iterator));
1818 /* calloc() implies:
1819 iterator->current = 0;
1820 iterator->chain = 0;
1826 FLAC_API void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator)
1828 FLAC__ASSERT(0 != iterator);
1833 FLAC_API void FLAC__metadata_iterator_init(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Chain *chain)
1835 FLAC__ASSERT(0 != iterator);
1836 FLAC__ASSERT(0 != chain);
1837 FLAC__ASSERT(0 != chain->head);
1839 iterator->chain = chain;
1840 iterator->current = chain->head;
1843 FLAC_API FLAC__bool FLAC__metadata_iterator_next(FLAC__Metadata_Iterator *iterator)
1845 FLAC__ASSERT(0 != iterator);
1847 if(0 == iterator->current || 0 == iterator->current->next)
1850 iterator->current = iterator->current->next;
1854 FLAC_API FLAC__bool FLAC__metadata_iterator_prev(FLAC__Metadata_Iterator *iterator)
1856 FLAC__ASSERT(0 != iterator);
1858 if(0 == iterator->current || 0 == iterator->current->prev)
1861 iterator->current = iterator->current->prev;
1865 FLAC_API FLAC__MetadataType FLAC__metadata_iterator_get_block_type(const FLAC__Metadata_Iterator *iterator)
1867 FLAC__ASSERT(0 != iterator);
1868 FLAC__ASSERT(0 != iterator->current);
1869 FLAC__ASSERT(0 != iterator->current->data);
1871 return iterator->current->data->type;
1874 FLAC_API FLAC__StreamMetadata *FLAC__metadata_iterator_get_block(FLAC__Metadata_Iterator *iterator)
1876 FLAC__ASSERT(0 != iterator);
1877 FLAC__ASSERT(0 != iterator->current);
1879 return iterator->current->data;
1882 FLAC_API FLAC__bool FLAC__metadata_iterator_set_block(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1884 FLAC__ASSERT(0 != iterator);
1885 FLAC__ASSERT(0 != block);
1886 return FLAC__metadata_iterator_delete_block(iterator, false) && FLAC__metadata_iterator_insert_block_after(iterator, block);
1889 FLAC_API FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__Metadata_Iterator *iterator, FLAC__bool replace_with_padding)
1891 FLAC__Metadata_Node *save;
1893 FLAC__ASSERT(0 != iterator);
1894 FLAC__ASSERT(0 != iterator->current);
1896 if(0 == iterator->current->prev) {
1897 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1901 save = iterator->current->prev;
1903 if(replace_with_padding) {
1904 FLAC__metadata_object_delete_data(iterator->current->data);
1905 iterator->current->data->type = FLAC__METADATA_TYPE_PADDING;
1908 chain_delete_node_(iterator->chain, iterator->current);
1911 iterator->current = save;
1915 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1917 FLAC__Metadata_Node *node;
1919 FLAC__ASSERT(0 != iterator);
1920 FLAC__ASSERT(0 != iterator->current);
1921 FLAC__ASSERT(0 != block);
1923 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1926 if(0 == iterator->current->prev) {
1927 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1931 if(0 == (node = node_new_()))
1935 iterator_insert_node_(iterator, node);
1936 iterator->current = node;
1940 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1942 FLAC__Metadata_Node *node;
1944 FLAC__ASSERT(0 != iterator);
1945 FLAC__ASSERT(0 != iterator->current);
1946 FLAC__ASSERT(0 != block);
1948 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1951 if(0 == (node = node_new_()))
1955 iterator_insert_node_after_(iterator, node);
1956 iterator->current = node;
1961 /****************************************************************************
1963 * Local function definitions
1965 ***************************************************************************/
1967 void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1973 for(i = 0; i < bytes; i++) {
1974 *(--b) = (FLAC__byte)(val & 0xff);
1979 void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1983 for(i = 0; i < bytes; i++) {
1984 *(b++) = (FLAC__byte)(val & 0xff);
1989 void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes)
1995 for(i = 0; i < bytes; i++) {
1996 *(--b) = (FLAC__byte)(val & 0xff);
2001 FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes)
2003 FLAC__uint32 ret = 0;
2006 for(i = 0; i < bytes; i++)
2007 ret = (ret << 8) | (FLAC__uint32)(*b++);
2012 FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes)
2014 FLAC__uint32 ret = 0;
2019 for(i = 0; i < bytes; i++)
2020 ret = (ret << 8) | (FLAC__uint32)(*--b);
2025 FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes)
2027 FLAC__uint64 ret = 0;
2030 for(i = 0; i < bytes; i++)
2031 ret = (ret << 8) | (FLAC__uint64)(*b++);
2036 FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator)
2038 FLAC__ASSERT(0 != iterator);
2039 FLAC__ASSERT(0 != iterator->file);
2041 if(!read_metadata_block_header_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, &iterator->is_last, &iterator->type, &iterator->length)) {
2042 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2049 FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block)
2051 FLAC__ASSERT(0 != iterator);
2052 FLAC__ASSERT(0 != iterator->file);
2054 iterator->status = read_metadata_block_data_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, block);
2056 return (iterator->status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK);
2059 FLAC__bool read_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__bool *is_last, FLAC__MetadataType *type, unsigned *length)
2061 FLAC__byte raw_header[FLAC__STREAM_METADATA_HEADER_LENGTH];
2063 if(read_cb(raw_header, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2066 *is_last = raw_header[0] & 0x80? true : false;
2067 *type = (FLAC__MetadataType)(raw_header[0] & 0x7f);
2068 *length = unpack_uint32_(raw_header + 1, 3);
2070 /* Note that we don't check:
2071 * if(iterator->type >= FLAC__METADATA_TYPE_UNDEFINED)
2072 * we just will read in an opaque block
2078 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata *block)
2080 switch(block->type) {
2081 case FLAC__METADATA_TYPE_STREAMINFO:
2082 return read_metadata_block_data_streaminfo_cb_(handle, read_cb, &block->data.stream_info);
2083 case FLAC__METADATA_TYPE_PADDING:
2084 return read_metadata_block_data_padding_cb_(handle, seek_cb, &block->data.padding, block->length);
2085 case FLAC__METADATA_TYPE_APPLICATION:
2086 return read_metadata_block_data_application_cb_(handle, read_cb, &block->data.application, block->length);
2087 case FLAC__METADATA_TYPE_SEEKTABLE:
2088 return read_metadata_block_data_seektable_cb_(handle, read_cb, &block->data.seek_table, block->length);
2089 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2090 return read_metadata_block_data_vorbis_comment_cb_(handle, read_cb, &block->data.vorbis_comment);
2091 case FLAC__METADATA_TYPE_CUESHEET:
2092 return read_metadata_block_data_cuesheet_cb_(handle, read_cb, &block->data.cue_sheet);
2093 case FLAC__METADATA_TYPE_PICTURE:
2094 return read_metadata_block_data_picture_cb_(handle, read_cb, &block->data.picture);
2096 return read_metadata_block_data_unknown_cb_(handle, read_cb, &block->data.unknown, block->length);
2100 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block)
2102 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH], *b;
2104 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2105 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2109 /* we are using hardcoded numbers for simplicity but we should
2110 * probably eventually write a bit-level unpacker and use the
2111 * _STREAMINFO_ constants.
2113 block->min_blocksize = unpack_uint32_(b, 2); b += 2;
2114 block->max_blocksize = unpack_uint32_(b, 2); b += 2;
2115 block->min_framesize = unpack_uint32_(b, 3); b += 3;
2116 block->max_framesize = unpack_uint32_(b, 3); b += 3;
2117 block->sample_rate = (unpack_uint32_(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4);
2118 block->channels = (unsigned)((b[2] & 0x0e) >> 1) + 1;
2119 block->bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 4) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1;
2120 block->total_samples = (((FLAC__uint64)(b[3] & 0x0f)) << 32) | unpack_uint64_(b+4, 4);
2121 memcpy(block->md5sum, b+8, 16);
2123 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2126 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_Padding *block, unsigned block_length)
2128 (void)block; /* nothing to do; we don't care about reading the padding bytes */
2130 if(0 != seek_cb(handle, block_length, SEEK_CUR))
2131 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2133 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2136 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Application *block, unsigned block_length)
2138 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2140 if(read_cb(block->id, 1, id_bytes, handle) != id_bytes)
2141 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2143 if(block_length < id_bytes)
2144 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2146 block_length -= id_bytes;
2148 if(block_length == 0) {
2152 if(0 == (block->data = malloc(block_length)))
2153 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2155 if(read_cb(block->data, 1, block_length, handle) != block_length)
2156 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2159 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2162 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_SeekTable *block, unsigned block_length)
2165 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2167 FLAC__ASSERT(block_length % FLAC__STREAM_METADATA_SEEKPOINT_LENGTH == 0);
2169 block->num_points = block_length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
2171 if(block->num_points == 0)
2173 else if(0 == (block->points = safe_malloc_mul_2op_p(block->num_points, /*times*/sizeof(FLAC__StreamMetadata_SeekPoint))))
2174 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2176 for(i = 0; i < block->num_points; i++) {
2177 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2178 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2179 /* some MAGIC NUMBERs here */
2180 block->points[i].sample_number = unpack_uint64_(buffer, 8);
2181 block->points[i].stream_offset = unpack_uint64_(buffer+8, 8);
2182 block->points[i].frame_samples = unpack_uint32_(buffer+16, 2);
2185 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2188 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment_Entry *entry)
2190 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2191 FLAC__byte buffer[4]; /* magic number is asserted below */
2193 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8 == sizeof(buffer));
2195 if(read_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2196 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2197 entry->length = unpack_uint32_little_endian_(buffer, entry_length_len);
2199 if(0 != entry->entry)
2202 if(entry->length == 0) {
2206 if(0 == (entry->entry = safe_malloc_add_2op_(entry->length, /*+*/1)))
2207 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2209 if(read_cb(entry->entry, 1, entry->length, handle) != entry->length)
2210 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2212 entry->entry[entry->length] = '\0';
2215 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2218 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment *block)
2221 FLAC__Metadata_SimpleIteratorStatus status;
2222 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2223 FLAC__byte buffer[4]; /* magic number is asserted below */
2225 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8 == sizeof(buffer));
2227 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, &(block->vendor_string))))
2230 if(read_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2231 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2232 block->num_comments = unpack_uint32_little_endian_(buffer, num_comments_len);
2234 if(block->num_comments == 0) {
2235 block->comments = 0;
2237 else if(0 == (block->comments = calloc(block->num_comments, sizeof(FLAC__StreamMetadata_VorbisComment_Entry))))
2238 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2240 for(i = 0; i < block->num_comments; i++) {
2241 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, block->comments + i)))
2245 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2248 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track)
2251 FLAC__byte buffer[32]; /* asserted below that this is big enough */
2253 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2254 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2255 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);
2257 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2258 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2259 if(read_cb(buffer, 1, len, handle) != len)
2260 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2261 track->offset = unpack_uint64_(buffer, len);
2263 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2264 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2265 if(read_cb(buffer, 1, len, handle) != len)
2266 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2267 track->number = (FLAC__byte)unpack_uint32_(buffer, len);
2269 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2270 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2271 if(read_cb(track->isrc, 1, len, handle) != len)
2272 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2274 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);
2275 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2276 if(read_cb(buffer, 1, len, handle) != len)
2277 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2278 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN == 1);
2279 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN == 1);
2280 track->type = buffer[0] >> 7;
2281 track->pre_emphasis = (buffer[0] >> 6) & 1;
2283 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2284 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2285 if(read_cb(buffer, 1, len, handle) != len)
2286 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2287 track->num_indices = (FLAC__byte)unpack_uint32_(buffer, len);
2289 if(track->num_indices == 0) {
2292 else if(0 == (track->indices = calloc(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index))))
2293 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2295 for(i = 0; i < track->num_indices; i++) {
2296 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2297 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2298 if(read_cb(buffer, 1, len, handle) != len)
2299 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2300 track->indices[i].offset = unpack_uint64_(buffer, len);
2302 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2303 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2304 if(read_cb(buffer, 1, len, handle) != len)
2305 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2306 track->indices[i].number = (FLAC__byte)unpack_uint32_(buffer, len);
2308 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2309 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2310 if(read_cb(buffer, 1, len, handle) != len)
2311 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2314 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2317 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block)
2320 FLAC__Metadata_SimpleIteratorStatus status;
2321 FLAC__byte buffer[1024]; /* MSVC needs a constant expression so we put a magic number and assert */
2323 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN)/8 <= sizeof(buffer));
2324 FLAC__ASSERT(sizeof(FLAC__uint64) <= sizeof(buffer));
2326 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2327 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2328 if(read_cb(block->media_catalog_number, 1, len, handle) != len)
2329 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2331 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2332 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2333 if(read_cb(buffer, 1, len, handle) != len)
2334 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2335 block->lead_in = unpack_uint64_(buffer, len);
2337 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2338 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2339 if(read_cb(buffer, 1, len, handle) != len)
2340 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2341 block->is_cd = buffer[0]&0x80? true : false;
2343 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2344 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2345 if(read_cb(buffer, 1, len, handle) != len)
2346 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2347 block->num_tracks = unpack_uint32_(buffer, len);
2349 if(block->num_tracks == 0) {
2352 else if(0 == (block->tracks = calloc(block->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track))))
2353 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2355 for(i = 0; i < block->num_tracks; i++) {
2356 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_cuesheet_track_cb_(handle, read_cb, block->tracks + i)))
2360 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2363 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)
2365 FLAC__byte buffer[sizeof(FLAC__uint32)];
2367 FLAC__ASSERT(0 != data);
2368 FLAC__ASSERT(length_len%8 == 0);
2370 length_len /= 8; /* convert to bytes */
2372 FLAC__ASSERT(sizeof(buffer) >= length_len);
2374 if(read_cb(buffer, 1, length_len, handle) != length_len)
2375 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2376 *length = unpack_uint32_(buffer, length_len);
2381 if(0 == (*data = safe_malloc_add_2op_(*length, /*+*/1)))
2382 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2385 if(read_cb(*data, 1, *length, handle) != *length)
2386 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2389 (*data)[*length] = '\0';
2391 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2394 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block)
2396 FLAC__Metadata_SimpleIteratorStatus status;
2397 FLAC__byte buffer[4]; /* asserted below that this is big enough */
2400 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2401 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2402 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2403 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2404 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2406 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_TYPE_LEN % 8 == 0);
2407 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN / 8;
2408 if(read_cb(buffer, 1, len, handle) != len)
2409 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2410 block->type = (FLAC__StreamMetadata_Picture_Type)unpack_uint32_(buffer, len);
2412 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)
2415 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)
2418 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN % 8 == 0);
2419 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN / 8;
2420 if(read_cb(buffer, 1, len, handle) != len)
2421 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2422 block->width = unpack_uint32_(buffer, len);
2424 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN % 8 == 0);
2425 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN / 8;
2426 if(read_cb(buffer, 1, len, handle) != len)
2427 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2428 block->height = unpack_uint32_(buffer, len);
2430 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN % 8 == 0);
2431 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN / 8;
2432 if(read_cb(buffer, 1, len, handle) != len)
2433 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2434 block->depth = unpack_uint32_(buffer, len);
2436 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_COLORS_LEN % 8 == 0);
2437 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN / 8;
2438 if(read_cb(buffer, 1, len, handle) != len)
2439 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2440 block->colors = unpack_uint32_(buffer, len);
2442 /* for convenience we use read_metadata_block_data_picture_cstring_cb_() even though it adds an extra terminating NUL we don't use */
2443 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)
2446 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2449 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2451 if(block_length == 0) {
2455 if(0 == (block->data = malloc(block_length)))
2456 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2458 if(read_cb(block->data, 1, block_length, handle) != block_length)
2459 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2462 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2465 FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2467 FLAC__ASSERT(0 != file);
2468 FLAC__ASSERT(0 != status);
2470 if(!write_metadata_block_header_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2471 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2478 FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2480 FLAC__ASSERT(0 != file);
2481 FLAC__ASSERT(0 != status);
2483 if (write_metadata_block_data_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2484 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2488 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2493 FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2495 FLAC__byte buffer[FLAC__STREAM_METADATA_HEADER_LENGTH];
2497 FLAC__ASSERT(block->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
2499 buffer[0] = (block->is_last? 0x80 : 0) | (FLAC__byte)block->type;
2500 pack_uint32_(block->length, buffer + 1, 3);
2502 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2508 FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2510 FLAC__ASSERT(0 != block);
2512 switch(block->type) {
2513 case FLAC__METADATA_TYPE_STREAMINFO:
2514 return write_metadata_block_data_streaminfo_cb_(handle, write_cb, &block->data.stream_info);
2515 case FLAC__METADATA_TYPE_PADDING:
2516 return write_metadata_block_data_padding_cb_(handle, write_cb, &block->data.padding, block->length);
2517 case FLAC__METADATA_TYPE_APPLICATION:
2518 return write_metadata_block_data_application_cb_(handle, write_cb, &block->data.application, block->length);
2519 case FLAC__METADATA_TYPE_SEEKTABLE:
2520 return write_metadata_block_data_seektable_cb_(handle, write_cb, &block->data.seek_table);
2521 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2522 return write_metadata_block_data_vorbis_comment_cb_(handle, write_cb, &block->data.vorbis_comment);
2523 case FLAC__METADATA_TYPE_CUESHEET:
2524 return write_metadata_block_data_cuesheet_cb_(handle, write_cb, &block->data.cue_sheet);
2525 case FLAC__METADATA_TYPE_PICTURE:
2526 return write_metadata_block_data_picture_cb_(handle, write_cb, &block->data.picture);
2528 return write_metadata_block_data_unknown_cb_(handle, write_cb, &block->data.unknown, block->length);
2532 FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block)
2534 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH];
2535 const unsigned channels1 = block->channels - 1;
2536 const unsigned bps1 = block->bits_per_sample - 1;
2538 /* we are using hardcoded numbers for simplicity but we should
2539 * probably eventually write a bit-level packer and use the
2540 * _STREAMINFO_ constants.
2542 pack_uint32_(block->min_blocksize, buffer, 2);
2543 pack_uint32_(block->max_blocksize, buffer+2, 2);
2544 pack_uint32_(block->min_framesize, buffer+4, 3);
2545 pack_uint32_(block->max_framesize, buffer+7, 3);
2546 buffer[10] = (block->sample_rate >> 12) & 0xff;
2547 buffer[11] = (block->sample_rate >> 4) & 0xff;
2548 buffer[12] = ((block->sample_rate & 0x0f) << 4) | (channels1 << 1) | (bps1 >> 4);
2549 buffer[13] = (FLAC__byte)(((bps1 & 0x0f) << 4) | ((block->total_samples >> 32) & 0x0f));
2550 pack_uint32_((FLAC__uint32)block->total_samples, buffer+14, 4);
2551 memcpy(buffer+18, block->md5sum, 16);
2553 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2559 FLAC__bool write_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Padding *block, unsigned block_length)
2561 unsigned i, n = block_length;
2562 FLAC__byte buffer[1024];
2566 memset(buffer, 0, 1024);
2568 for(i = 0; i < n/1024; i++)
2569 if(write_cb(buffer, 1, 1024, handle) != 1024)
2574 if(write_cb(buffer, 1, n, handle) != n)
2580 FLAC__bool write_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Application *block, unsigned block_length)
2582 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2584 if(write_cb(block->id, 1, id_bytes, handle) != id_bytes)
2587 block_length -= id_bytes;
2589 if(write_cb(block->data, 1, block_length, handle) != block_length)
2595 FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block)
2598 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2600 for(i = 0; i < block->num_points; i++) {
2601 /* some MAGIC NUMBERs here */
2602 pack_uint64_(block->points[i].sample_number, buffer, 8);
2603 pack_uint64_(block->points[i].stream_offset, buffer+8, 8);
2604 pack_uint32_(block->points[i].frame_samples, buffer+16, 2);
2605 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2612 FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block)
2615 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2616 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2617 FLAC__byte buffer[4]; /* magic number is asserted below */
2619 FLAC__ASSERT(flac_max(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN, FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8 == sizeof(buffer));
2621 pack_uint32_little_endian_(block->vendor_string.length, buffer, entry_length_len);
2622 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2624 if(write_cb(block->vendor_string.entry, 1, block->vendor_string.length, handle) != block->vendor_string.length)
2627 pack_uint32_little_endian_(block->num_comments, buffer, num_comments_len);
2628 if(write_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2631 for(i = 0; i < block->num_comments; i++) {
2632 pack_uint32_little_endian_(block->comments[i].length, buffer, entry_length_len);
2633 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2635 if(write_cb(block->comments[i].entry, 1, block->comments[i].length, handle) != block->comments[i].length)
2642 FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block)
2645 FLAC__byte buffer[1024]; /* asserted below that this is big enough */
2647 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2648 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN/8);
2649 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);
2650 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2652 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2653 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2654 if(write_cb(block->media_catalog_number, 1, len, handle) != len)
2657 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2658 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2659 pack_uint64_(block->lead_in, buffer, len);
2660 if(write_cb(buffer, 1, len, handle) != len)
2663 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2664 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2665 memset(buffer, 0, len);
2668 if(write_cb(buffer, 1, len, handle) != len)
2671 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2672 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2673 pack_uint32_(block->num_tracks, buffer, len);
2674 if(write_cb(buffer, 1, len, handle) != len)
2677 for(i = 0; i < block->num_tracks; i++) {
2678 FLAC__StreamMetadata_CueSheet_Track *track = block->tracks + i;
2680 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2681 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2682 pack_uint64_(track->offset, buffer, len);
2683 if(write_cb(buffer, 1, len, handle) != len)
2686 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2687 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2688 pack_uint32_(track->number, buffer, len);
2689 if(write_cb(buffer, 1, len, handle) != len)
2692 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2693 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2694 if(write_cb(track->isrc, 1, len, handle) != len)
2697 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);
2698 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2699 memset(buffer, 0, len);
2700 buffer[0] = (track->type << 7) | (track->pre_emphasis << 6);
2701 if(write_cb(buffer, 1, len, handle) != len)
2704 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2705 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2706 pack_uint32_(track->num_indices, buffer, len);
2707 if(write_cb(buffer, 1, len, handle) != len)
2710 for(j = 0; j < track->num_indices; j++) {
2711 FLAC__StreamMetadata_CueSheet_Index *index = track->indices + j;
2713 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2714 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2715 pack_uint64_(index->offset, buffer, len);
2716 if(write_cb(buffer, 1, len, handle) != len)
2719 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2720 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2721 pack_uint32_(index->number, buffer, len);
2722 if(write_cb(buffer, 1, len, handle) != len)
2725 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2726 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2727 memset(buffer, 0, len);
2728 if(write_cb(buffer, 1, len, handle) != len)
2736 FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block)
2740 FLAC__byte buffer[4]; /* magic number is asserted below */
2742 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_TYPE_LEN%8);
2743 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN%8);
2744 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN%8);
2745 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN%8);
2746 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN%8);
2747 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN%8);
2748 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_COLORS_LEN%8);
2749 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN%8);
2750 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2751 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8);
2752 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8);
2753 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2754 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2755 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2756 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2757 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8);
2759 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8;
2760 pack_uint32_(block->type, buffer, len);
2761 if(write_cb(buffer, 1, len, handle) != len)
2764 len = FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8;
2765 slen = strlen(block->mime_type);
2766 pack_uint32_(slen, buffer, len);
2767 if(write_cb(buffer, 1, len, handle) != len)
2769 if(write_cb(block->mime_type, 1, slen, handle) != slen)
2772 len = FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8;
2773 slen = strlen((const char *)block->description);
2774 pack_uint32_(slen, buffer, len);
2775 if(write_cb(buffer, 1, len, handle) != len)
2777 if(write_cb(block->description, 1, slen, handle) != slen)
2780 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8;
2781 pack_uint32_(block->width, buffer, len);
2782 if(write_cb(buffer, 1, len, handle) != len)
2785 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8;
2786 pack_uint32_(block->height, buffer, len);
2787 if(write_cb(buffer, 1, len, handle) != len)
2790 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8;
2791 pack_uint32_(block->depth, buffer, len);
2792 if(write_cb(buffer, 1, len, handle) != len)
2795 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8;
2796 pack_uint32_(block->colors, buffer, len);
2797 if(write_cb(buffer, 1, len, handle) != len)
2800 len = FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8;
2801 pack_uint32_(block->data_length, buffer, len);
2802 if(write_cb(buffer, 1, len, handle) != len)
2804 if(write_cb(block->data, 1, block->data_length, handle) != block->data_length)
2810 FLAC__bool write_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2812 if(write_cb(block->data, 1, block_length, handle) != block_length)
2818 FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block)
2820 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2821 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2825 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2828 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2831 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2832 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2836 return read_metadata_block_header_(iterator);
2839 FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last)
2841 FLAC__StreamMetadata *padding;
2843 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2844 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2848 block->is_last = false;
2850 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2853 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2856 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
2857 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2859 padding->is_last = padding_is_last;
2860 padding->length = padding_length;
2862 if(!write_metadata_block_header_(iterator->file, &iterator->status, padding)) {
2863 FLAC__metadata_object_delete(padding);
2867 if(!write_metadata_block_data_(iterator->file, &iterator->status, padding)) {
2868 FLAC__metadata_object_delete(padding);
2872 FLAC__metadata_object_delete(padding);
2874 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2875 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2879 return read_metadata_block_header_(iterator);
2882 FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append)
2884 FILE *tempfile = NULL;
2885 char *tempfilename = NULL;
2886 int fixup_is_last_code = 0; /* 0 => no need to change any is_last flags */
2887 off_t fixup_is_last_flag_offset = -1;
2889 FLAC__ASSERT(0 != block || append == false);
2891 if(iterator->is_last) {
2893 fixup_is_last_code = 1; /* 1 => clear the is_last flag at the following offset */
2894 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2896 else if(0 == block) {
2897 simple_iterator_push_(iterator);
2898 if(!FLAC__metadata_simple_iterator_prev(iterator)) {
2899 (void)simple_iterator_pop_(iterator);
2902 fixup_is_last_code = -1; /* -1 => set the is_last the flag at the following offset */
2903 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2904 if(!simple_iterator_pop_(iterator))
2909 if(!simple_iterator_copy_file_prefix_(iterator, &tempfile, &tempfilename, append))
2913 if(!write_metadata_block_header_(tempfile, &iterator->status, block)) {
2914 cleanup_tempfile_(&tempfile, &tempfilename);
2918 if(!write_metadata_block_data_(tempfile, &iterator->status, block)) {
2919 cleanup_tempfile_(&tempfile, &tempfilename);
2924 if(!simple_iterator_copy_file_postfix_(iterator, &tempfile, &tempfilename, fixup_is_last_code, fixup_is_last_flag_offset, block==0))
2928 return FLAC__metadata_simple_iterator_next(iterator);
2933 void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator)
2935 FLAC__ASSERT(iterator->depth+1 < SIMPLE_ITERATOR_MAX_PUSH_DEPTH);
2936 iterator->offset[iterator->depth+1] = iterator->offset[iterator->depth];
2940 FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator)
2942 FLAC__ASSERT(iterator->depth > 0);
2944 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2945 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2949 return read_metadata_block_header_(iterator);
2956 * 3: not a FLAC file
2958 unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb)
2960 FLAC__byte buffer[4];
2964 FLAC__ASSERT(FLAC__STREAM_SYNC_LENGTH == sizeof(buffer));
2966 /* skip any id3v2 tag */
2968 n = read_cb(buffer, 1, 4, handle);
2973 else if(0 == memcmp(buffer, "ID3", 3)) {
2974 unsigned tag_length = 0;
2976 /* skip to the tag length */
2977 if(seek_cb(handle, 2, SEEK_CUR) < 0)
2980 /* read the length */
2981 for(i = 0; i < 4; i++) {
2982 if(read_cb(buffer, 1, 1, handle) < 1 || buffer[0] & 0x80)
2985 tag_length |= (buffer[0] & 0x7f);
2988 /* skip the rest of the tag */
2989 if(seek_cb(handle, tag_length, SEEK_CUR) < 0)
2992 /* read the stream sync code */
2994 n = read_cb(buffer, 1, 4, handle);
3001 /* check for the fLaC signature */
3002 if(0 == memcmp(FLAC__STREAM_SYNC_STRING, buffer, FLAC__STREAM_SYNC_LENGTH))
3008 unsigned seek_to_first_metadata_block_(FILE *f)
3010 return seek_to_first_metadata_block_cb_((FLAC__IOHandle)f, (FLAC__IOCallback_Read)fread, fseek_wrapper_);
3013 FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append)
3015 const off_t offset_end = append? iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length : iterator->offset[iterator->depth];
3017 if(0 != fseeko(iterator->file, 0, SEEK_SET)) {
3018 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3021 if(!open_tempfile_(iterator->filename, iterator->tempfile_path_prefix, tempfile, tempfilename, &iterator->status)) {
3022 cleanup_tempfile_(tempfile, tempfilename);
3025 if(!copy_n_bytes_from_file_(iterator->file, *tempfile, offset_end, &iterator->status)) {
3026 cleanup_tempfile_(tempfile, tempfilename);
3033 FLAC__bool simple_iterator_copy_file_postfix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, int fixup_is_last_code, off_t fixup_is_last_flag_offset, FLAC__bool backup)
3035 off_t save_offset = iterator->offset[iterator->depth];
3036 FLAC__ASSERT(0 != *tempfile);
3038 if(0 != fseeko(iterator->file, save_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length, SEEK_SET)) {
3039 cleanup_tempfile_(tempfile, tempfilename);
3040 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3043 if(!copy_remaining_bytes_from_file_(iterator->file, *tempfile, &iterator->status)) {
3044 cleanup_tempfile_(tempfile, tempfilename);
3048 if(fixup_is_last_code != 0) {
3050 * if code == 1, it means a block was appended to the end so
3051 * we have to clear the is_last flag of the previous block
3052 * if code == -1, it means the last block was deleted so
3053 * we have to set the is_last flag of the previous block
3055 /* MAGIC NUMBERs here; we know the is_last flag is the high bit of the byte at this location */
3057 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3058 cleanup_tempfile_(tempfile, tempfilename);
3059 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3062 if(fread(&x, 1, 1, *tempfile) != 1) {
3063 cleanup_tempfile_(tempfile, tempfilename);
3064 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3067 if(fixup_is_last_code > 0) {
3068 FLAC__ASSERT(x & 0x80);
3072 FLAC__ASSERT(!(x & 0x80));
3075 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3076 cleanup_tempfile_(tempfile, tempfilename);
3077 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3080 if(local__fwrite(&x, 1, 1, *tempfile) != 1) {
3081 cleanup_tempfile_(tempfile, tempfilename);
3082 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3087 (void)fclose(iterator->file);
3089 if(!transport_tempfile_(iterator->filename, tempfile, tempfilename, &iterator->status))
3092 if(iterator->has_stats)
3093 set_file_stats_(iterator->filename, &iterator->stats);
3095 if(!simple_iterator_prime_input_(iterator, !iterator->is_writable))
3098 while(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length < save_offset)
3099 if(!FLAC__metadata_simple_iterator_next(iterator))
3104 /* move the iterator to it's original block faster by faking a push, then doing a pop_ */
3105 FLAC__ASSERT(iterator->depth == 0);
3106 iterator->offset[0] = save_offset;
3108 return simple_iterator_pop_(iterator);
3112 FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status)
3114 FLAC__byte buffer[8192];
3117 FLAC__ASSERT(bytes >= 0);
3119 n = flac_min(sizeof(buffer), (size_t)bytes);
3120 if(fread(buffer, 1, n, file) != n) {
3121 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3124 if(local__fwrite(buffer, 1, n, tempfile) != n) {
3125 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3134 FLAC__bool copy_n_bytes_from_file_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOHandle temp_handle, FLAC__IOCallback_Write temp_write_cb, off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status)
3136 FLAC__byte buffer[8192];
3139 FLAC__ASSERT(bytes >= 0);
3141 n = flac_min(sizeof(buffer), (size_t)bytes);
3142 if(read_cb(buffer, 1, n, handle) != n) {
3143 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3146 if(temp_write_cb(buffer, 1, n, temp_handle) != n) {
3147 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3156 FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status)
3158 FLAC__byte buffer[8192];
3161 while(!feof(file)) {
3162 n = fread(buffer, 1, sizeof(buffer), file);
3163 if(n == 0 && !feof(file)) {
3164 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3167 if(n > 0 && local__fwrite(buffer, 1, n, tempfile) != n) {
3168 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3176 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)
3178 FLAC__byte buffer[8192];
3181 while(!eof_cb(handle)) {
3182 n = read_cb(buffer, 1, sizeof(buffer), handle);
3183 if(n == 0 && !eof_cb(handle)) {
3184 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3187 if(n > 0 && temp_write_cb(buffer, 1, n, temp_handle) != n) {
3188 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3196 FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3198 static const char *tempfile_suffix = ".metadata_edit";
3199 if(0 == tempfile_path_prefix) {
3200 if(0 == (*tempfilename = safe_malloc_add_3op_(strlen(filename), /*+*/strlen(tempfile_suffix), /*+*/1))) {
3201 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3204 strcpy(*tempfilename, filename);
3205 strcat(*tempfilename, tempfile_suffix);
3208 const char *p = strrchr(filename, '/');
3214 if(0 == (*tempfilename = safe_malloc_add_4op_(strlen(tempfile_path_prefix), /*+*/strlen(p), /*+*/strlen(tempfile_suffix), /*+*/2))) {
3215 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3218 strcpy(*tempfilename, tempfile_path_prefix);
3219 strcat(*tempfilename, "/");
3220 strcat(*tempfilename, p);
3221 strcat(*tempfilename, tempfile_suffix);
3224 if(0 == (*tempfile = fopen(*tempfilename, "w+b"))) {
3225 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
3232 FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3234 FLAC__ASSERT(0 != filename);
3235 FLAC__ASSERT(0 != tempfile);
3236 FLAC__ASSERT(0 != *tempfile);
3237 FLAC__ASSERT(0 != tempfilename);
3238 FLAC__ASSERT(0 != *tempfilename);
3239 FLAC__ASSERT(0 != status);
3241 (void)fclose(*tempfile);
3244 #if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__ || defined __EMX__
3245 /* on some flavors of windows, rename() will fail if the destination already exists */
3246 if(unlink(filename) < 0) {
3247 cleanup_tempfile_(tempfile, tempfilename);
3248 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR;
3253 /*@@@ to fully support the tempfile_path_prefix we need to update this piece to actually copy across filesystems instead of just rename(): */
3254 if(0 != rename(*tempfilename, filename)) {
3255 cleanup_tempfile_(tempfile, tempfilename);
3256 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR;
3260 cleanup_tempfile_(tempfile, tempfilename);
3265 void cleanup_tempfile_(FILE **tempfile, char **tempfilename)
3267 if(0 != *tempfile) {
3268 (void)fclose(*tempfile);
3272 if(0 != *tempfilename) {
3273 (void)unlink(*tempfilename);
3274 free(*tempfilename);
3279 FLAC__bool get_file_stats_(const char *filename, struct stat *stats)
3281 FLAC__ASSERT(0 != filename);
3282 FLAC__ASSERT(0 != stats);
3283 return (0 == stat(filename, stats));
3286 void set_file_stats_(const char *filename, struct stat *stats)
3288 struct utimbuf srctime;
3290 FLAC__ASSERT(0 != filename);
3291 FLAC__ASSERT(0 != stats);
3293 srctime.actime = stats->st_atime;
3294 srctime.modtime = stats->st_mtime;
3295 (void)chmod(filename, stats->st_mode);
3296 (void)utime(filename, &srctime);
3297 #if !defined _MSC_VER && !defined __BORLANDC__ && !defined __MINGW32__
3298 (void)chown(filename, stats->st_uid, -1);
3299 (void)chown(filename, -1, stats->st_gid);
3303 int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence)
3305 return fseeko((FILE*)handle, (off_t)offset, whence);
3308 FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle)
3310 return ftello((FILE*)handle);
3313 FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status)
3316 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK:
3317 return FLAC__METADATA_CHAIN_STATUS_OK;
3318 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT:
3319 return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT;
3320 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE:
3321 return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
3322 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE:
3323 return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
3324 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE:
3325 return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE;
3326 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA:
3327 return FLAC__METADATA_CHAIN_STATUS_BAD_METADATA;
3328 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR:
3329 return FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
3330 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR:
3331 return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
3332 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR:
3333 return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
3334 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR:
3335 return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR;
3336 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR:
3337 return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR;
3338 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR:
3339 return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
3340 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR:
3342 return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;