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 "share/macros.h"
50 #include "private/macros.h"
51 #include "private/memory.h"
53 /* Alias the first (in share/alloc.h) to the second (in src/libFLAC/memory.c). */
54 #define safe_malloc_mul_2op_ safe_malloc_mul_2op_p
56 /****************************************************************************
58 * Local function declarations
60 ***************************************************************************/
62 static void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
63 static void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
64 static void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes);
65 static FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes);
66 static FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes);
67 static FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes);
69 static FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator);
70 static FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block);
71 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);
72 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);
73 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block);
74 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);
75 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);
76 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);
77 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);
78 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment *block);
79 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track);
80 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block);
81 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block);
82 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);
84 static FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
85 static FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
86 static FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
87 static FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
88 static FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block);
89 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);
90 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);
91 static FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block);
92 static FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block);
93 static FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block);
94 static FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block);
95 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);
97 static FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block);
98 static FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last);
99 static FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append);
101 static void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator);
102 static FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator);
104 static unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb);
105 static unsigned seek_to_first_metadata_block_(FILE *f);
107 static FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append);
108 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);
110 static FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status);
111 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);
112 static FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status);
113 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);
115 static FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
116 static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
117 static void cleanup_tempfile_(FILE **tempfile, char **tempfilename);
119 static FLAC__bool get_file_stats_(const char *filename, struct stat *stats);
120 static void set_file_stats_(const char *filename, struct stat *stats);
122 static int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence);
123 static FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle);
125 static FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status);
128 #ifdef FLAC__VALGRIND_TESTING
129 static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
131 size_t ret = fwrite(ptr, size, nmemb, stream);
137 #define local__fwrite fwrite
140 /****************************************************************************
142 * Level 0 implementation
144 ***************************************************************************/
146 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
147 static void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
148 static void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
151 FLAC__bool got_error;
152 FLAC__StreamMetadata *object;
153 } level0_client_data;
155 static FLAC__StreamMetadata *get_one_metadata_block_(const char *filename, FLAC__MetadataType type)
157 level0_client_data cd;
158 FLAC__StreamDecoder *decoder;
160 FLAC__ASSERT(0 != filename);
162 cd.got_error = false;
165 decoder = FLAC__stream_decoder_new();
170 FLAC__stream_decoder_set_md5_checking(decoder, false);
171 FLAC__stream_decoder_set_metadata_ignore_all(decoder);
172 FLAC__stream_decoder_set_metadata_respond(decoder, type);
174 if(FLAC__stream_decoder_init_file(decoder, filename, write_callback_, metadata_callback_, error_callback_, &cd) != FLAC__STREAM_DECODER_INIT_STATUS_OK || cd.got_error) {
175 (void)FLAC__stream_decoder_finish(decoder);
176 FLAC__stream_decoder_delete(decoder);
180 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder) || cd.got_error) {
181 (void)FLAC__stream_decoder_finish(decoder);
182 FLAC__stream_decoder_delete(decoder);
184 FLAC__metadata_object_delete(cd.object);
188 (void)FLAC__stream_decoder_finish(decoder);
189 FLAC__stream_decoder_delete(decoder);
194 FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo)
196 FLAC__StreamMetadata *object;
198 FLAC__ASSERT(0 != filename);
199 FLAC__ASSERT(0 != streaminfo);
201 object = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_STREAMINFO);
204 /* can just copy the contents since STREAMINFO has no internal structure */
205 *streaminfo = *object;
206 FLAC__metadata_object_delete(object);
214 FLAC_API FLAC__bool FLAC__metadata_get_tags(const char *filename, FLAC__StreamMetadata **tags)
216 FLAC__ASSERT(0 != filename);
217 FLAC__ASSERT(0 != tags);
219 *tags = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_VORBIS_COMMENT);
224 FLAC_API FLAC__bool FLAC__metadata_get_cuesheet(const char *filename, FLAC__StreamMetadata **cuesheet)
226 FLAC__ASSERT(0 != filename);
227 FLAC__ASSERT(0 != cuesheet);
229 *cuesheet = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_CUESHEET);
231 return 0 != *cuesheet;
234 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
236 (void)decoder, (void)frame, (void)buffer, (void)client_data;
238 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
241 void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
243 level0_client_data *cd = (level0_client_data *)client_data;
247 * we assume we only get here when the one metadata block we were
248 * looking for was passed to us
250 if(!cd->got_error && 0 == cd->object) {
251 if(0 == (cd->object = FLAC__metadata_object_clone(metadata)))
252 cd->got_error = true;
256 void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
258 level0_client_data *cd = (level0_client_data *)client_data;
261 if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
262 cd->got_error = true;
265 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)
267 FLAC__Metadata_SimpleIterator *it;
268 FLAC__uint64 max_area_seen = 0;
269 FLAC__uint64 max_depth_seen = 0;
271 FLAC__ASSERT(0 != filename);
272 FLAC__ASSERT(0 != picture);
276 it = FLAC__metadata_simple_iterator_new();
279 if(!FLAC__metadata_simple_iterator_init(it, filename, /*read_only=*/true, /*preserve_file_stats=*/true)) {
280 FLAC__metadata_simple_iterator_delete(it);
284 if(FLAC__metadata_simple_iterator_get_block_type(it) == FLAC__METADATA_TYPE_PICTURE) {
285 FLAC__StreamMetadata *obj = FLAC__metadata_simple_iterator_get_block(it);
286 FLAC__uint64 area = (FLAC__uint64)obj->data.picture.width * (FLAC__uint64)obj->data.picture.height;
287 /* check constraints */
289 (type == (FLAC__StreamMetadata_Picture_Type)(-1) || type == obj->data.picture.type) &&
290 (mime_type == 0 || !strcmp(mime_type, obj->data.picture.mime_type)) &&
291 (description == 0 || !strcmp((const char *)description, (const char *)obj->data.picture.description)) &&
292 obj->data.picture.width <= max_width &&
293 obj->data.picture.height <= max_height &&
294 obj->data.picture.depth <= max_depth &&
295 obj->data.picture.colors <= max_colors &&
296 (area > max_area_seen || (area == max_area_seen && obj->data.picture.depth > max_depth_seen))
299 FLAC__metadata_object_delete(*picture);
301 max_area_seen = area;
302 max_depth_seen = obj->data.picture.depth;
305 FLAC__metadata_object_delete(obj);
308 } while(FLAC__metadata_simple_iterator_next(it));
310 FLAC__metadata_simple_iterator_delete(it);
312 return (0 != *picture);
316 /****************************************************************************
318 * Level 1 implementation
320 ***************************************************************************/
322 #define SIMPLE_ITERATOR_MAX_PUSH_DEPTH (1+4)
323 /* 1 for initial offset, +4 for our own personal use */
325 struct FLAC__Metadata_SimpleIterator {
327 char *filename, *tempfile_path_prefix;
329 FLAC__bool has_stats;
330 FLAC__bool is_writable;
331 FLAC__Metadata_SimpleIteratorStatus status;
332 off_t offset[SIMPLE_ITERATOR_MAX_PUSH_DEPTH];
333 off_t first_offset; /* this is the offset to the STREAMINFO block */
335 /* this is the metadata block header of the current block we are pointing to: */
337 FLAC__MetadataType type;
341 FLAC_API const char * const FLAC__Metadata_SimpleIteratorStatusString[] = {
342 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK",
343 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT",
344 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE",
345 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE",
346 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE",
347 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA",
348 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR",
349 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR",
350 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR",
351 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR",
352 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR",
353 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR",
354 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR"
358 FLAC_API FLAC__Metadata_SimpleIterator *FLAC__metadata_simple_iterator_new(void)
360 FLAC__Metadata_SimpleIterator *iterator = calloc(1, sizeof(FLAC__Metadata_SimpleIterator));
364 iterator->filename = 0;
365 iterator->tempfile_path_prefix = 0;
366 iterator->has_stats = false;
367 iterator->is_writable = false;
368 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
369 iterator->first_offset = iterator->offset[0] = -1;
376 static void simple_iterator_free_guts_(FLAC__Metadata_SimpleIterator *iterator)
378 FLAC__ASSERT(0 != iterator);
380 if(0 != iterator->file) {
381 fclose(iterator->file);
383 if(iterator->has_stats)
384 set_file_stats_(iterator->filename, &iterator->stats);
386 if(0 != iterator->filename) {
387 free(iterator->filename);
388 iterator->filename = 0;
390 if(0 != iterator->tempfile_path_prefix) {
391 free(iterator->tempfile_path_prefix);
392 iterator->tempfile_path_prefix = 0;
396 FLAC_API void FLAC__metadata_simple_iterator_delete(FLAC__Metadata_SimpleIterator *iterator)
398 FLAC__ASSERT(0 != iterator);
400 simple_iterator_free_guts_(iterator);
404 FLAC_API FLAC__Metadata_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__Metadata_SimpleIterator *iterator)
406 FLAC__Metadata_SimpleIteratorStatus status;
408 FLAC__ASSERT(0 != iterator);
410 status = iterator->status;
411 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
415 static FLAC__bool simple_iterator_prime_input_(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool read_only)
419 FLAC__ASSERT(0 != iterator);
421 if(read_only || 0 == (iterator->file = fopen(iterator->filename, "r+b"))) {
422 iterator->is_writable = false;
423 if(read_only || errno == EACCES) {
424 if(0 == (iterator->file = fopen(iterator->filename, "rb"))) {
425 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
430 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
435 iterator->is_writable = true;
438 ret = seek_to_first_metadata_block_(iterator->file);
442 iterator->first_offset = iterator->offset[iterator->depth] = ftello(iterator->file);
443 return read_metadata_block_header_(iterator);
445 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
448 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
451 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE;
460 @@@ If we decide to finish implementing this, put this comment back in metadata.h
462 * The 'tempfile_path_prefix' allows you to specify a directory where
463 * tempfiles should go. Remember that if your metadata edits cause the
464 * FLAC file to grow, the entire file will have to be rewritten. If
465 * 'tempfile_path_prefix' is NULL, the temp file will be written in the
466 * same directory as the original FLAC file. This makes replacing the
467 * original with the tempfile fast but requires extra space in the same
468 * partition for the tempfile. If space is a problem, you can pass a
469 * directory name belonging to a different partition in
470 * 'tempfile_path_prefix'. Note that you should use the forward slash
471 * '/' as the directory separator. A trailing slash is not needed; it
472 * will be added automatically.
474 FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats, const char *tempfile_path_prefix);
477 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)
479 const char *tempfile_path_prefix = 0; /*@@@ search for comments near 'rename(...)' for what it will take to finish implementing this */
481 FLAC__ASSERT(0 != iterator);
482 FLAC__ASSERT(0 != filename);
484 simple_iterator_free_guts_(iterator);
486 if(!read_only && preserve_file_stats)
487 iterator->has_stats = get_file_stats_(filename, &iterator->stats);
489 if(0 == (iterator->filename = strdup(filename))) {
490 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
493 if(0 != tempfile_path_prefix && 0 == (iterator->tempfile_path_prefix = strdup(tempfile_path_prefix))) {
494 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
498 return simple_iterator_prime_input_(iterator, read_only);
501 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__Metadata_SimpleIterator *iterator)
503 FLAC__ASSERT(0 != iterator);
504 FLAC__ASSERT(0 != iterator->file);
506 return iterator->is_writable;
509 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__Metadata_SimpleIterator *iterator)
511 FLAC__ASSERT(0 != iterator);
512 FLAC__ASSERT(0 != iterator->file);
514 if(iterator->is_last)
517 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
518 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
522 iterator->offset[iterator->depth] = ftello(iterator->file);
524 return read_metadata_block_header_(iterator);
527 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__Metadata_SimpleIterator *iterator)
531 FLAC__ASSERT(0 != iterator);
532 FLAC__ASSERT(0 != iterator->file);
534 if(iterator->offset[iterator->depth] == iterator->first_offset)
537 if(0 != fseeko(iterator->file, iterator->first_offset, SEEK_SET)) {
538 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
541 this_offset = iterator->first_offset;
542 if(!read_metadata_block_header_(iterator))
545 /* we ignore any error from ftello() and catch it in fseeko() */
546 while(ftello(iterator->file) + (off_t)iterator->length < iterator->offset[iterator->depth]) {
547 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
548 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
551 this_offset = ftello(iterator->file);
552 if(!read_metadata_block_header_(iterator))
556 iterator->offset[iterator->depth] = this_offset;
562 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_last(const FLAC__Metadata_SimpleIterator *iterator)
564 FLAC__ASSERT(0 != iterator);
565 FLAC__ASSERT(0 != iterator->file);
567 return iterator->is_last;
571 FLAC_API off_t FLAC__metadata_simple_iterator_get_block_offset(const FLAC__Metadata_SimpleIterator *iterator)
573 FLAC__ASSERT(0 != iterator);
574 FLAC__ASSERT(0 != iterator->file);
576 return iterator->offset[iterator->depth];
579 FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator)
581 FLAC__ASSERT(0 != iterator);
582 FLAC__ASSERT(0 != iterator->file);
584 return iterator->type;
588 FLAC_API unsigned FLAC__metadata_simple_iterator_get_block_length(const FLAC__Metadata_SimpleIterator *iterator)
590 FLAC__ASSERT(0 != iterator);
591 FLAC__ASSERT(0 != iterator->file);
593 return iterator->length;
597 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_get_application_id(FLAC__Metadata_SimpleIterator *iterator, FLAC__byte *id)
599 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
601 FLAC__ASSERT(0 != iterator);
602 FLAC__ASSERT(0 != iterator->file);
603 FLAC__ASSERT(0 != id);
605 if(iterator->type != FLAC__METADATA_TYPE_APPLICATION) {
606 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
610 if(fread(id, 1, id_bytes, iterator->file) != id_bytes) {
611 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
616 if(0 != fseeko(iterator->file, -((int)id_bytes), SEEK_CUR)) {
617 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
624 FLAC_API FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator)
626 FLAC__StreamMetadata *block = FLAC__metadata_object_new(iterator->type);
628 FLAC__ASSERT(0 != iterator);
629 FLAC__ASSERT(0 != iterator->file);
632 block->is_last = iterator->is_last;
633 block->length = iterator->length;
635 if(!read_metadata_block_data_(iterator, block)) {
636 FLAC__metadata_object_delete(block);
640 /* back up to the beginning of the block data to stay consistent */
641 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH, SEEK_SET)) {
642 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
643 FLAC__metadata_object_delete(block);
648 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
653 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
655 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth];)
658 FLAC__ASSERT(0 != iterator);
659 FLAC__ASSERT(0 != iterator->file);
660 FLAC__ASSERT(0 != block);
662 if(!iterator->is_writable) {
663 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
667 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO || block->type == FLAC__METADATA_TYPE_STREAMINFO) {
668 if(iterator->type != block->type) {
669 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
674 block->is_last = iterator->is_last;
676 if(iterator->length == block->length)
677 return write_metadata_block_stationary_(iterator, block);
678 else if(iterator->length > block->length) {
679 if(use_padding && iterator->length >= FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) {
680 ret = write_metadata_block_stationary_with_padding_(iterator, block, iterator->length - FLAC__STREAM_METADATA_HEADER_LENGTH - block->length, block->is_last);
681 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
682 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
686 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
687 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
688 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
692 else /* iterator->length < block->length */ {
693 unsigned padding_leftover = 0;
694 FLAC__bool padding_is_last = false;
696 /* first see if we can even use padding */
697 if(iterator->is_last) {
701 const unsigned extra_padding_bytes_required = block->length - iterator->length;
702 simple_iterator_push_(iterator);
703 if(!FLAC__metadata_simple_iterator_next(iterator)) {
704 (void)simple_iterator_pop_(iterator);
707 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
711 if(FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length == extra_padding_bytes_required) {
712 padding_leftover = 0;
713 block->is_last = iterator->is_last;
715 else if(iterator->length < extra_padding_bytes_required)
718 padding_leftover = FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length - extra_padding_bytes_required;
719 padding_is_last = iterator->is_last;
720 block->is_last = false;
723 if(!simple_iterator_pop_(iterator))
728 if(padding_leftover == 0) {
729 ret = write_metadata_block_stationary_(iterator, block);
730 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
731 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
735 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
736 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
737 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
738 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
743 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
744 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
745 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
751 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
753 unsigned padding_leftover = 0;
754 FLAC__bool padding_is_last = false;
756 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length;)
759 FLAC__ASSERT(0 != iterator);
760 FLAC__ASSERT(0 != iterator->file);
761 FLAC__ASSERT(0 != block);
763 if(!iterator->is_writable)
766 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
767 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
771 block->is_last = iterator->is_last;
774 /* first see if we can even use padding */
775 if(iterator->is_last) {
779 simple_iterator_push_(iterator);
780 if(!FLAC__metadata_simple_iterator_next(iterator)) {
781 (void)simple_iterator_pop_(iterator);
784 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
788 if(iterator->length == block->length) {
789 padding_leftover = 0;
790 block->is_last = iterator->is_last;
792 else if(iterator->length < FLAC__STREAM_METADATA_HEADER_LENGTH + block->length)
795 padding_leftover = iterator->length - block->length;
796 padding_is_last = iterator->is_last;
797 block->is_last = false;
800 if(!simple_iterator_pop_(iterator))
805 /* move to the next block, which is suitable padding */
806 if(!FLAC__metadata_simple_iterator_next(iterator))
808 if(padding_leftover == 0) {
809 ret = write_metadata_block_stationary_(iterator, block);
810 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
811 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
815 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
816 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
817 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
818 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
823 ret = rewrite_whole_file_(iterator, block, /*append=*/true);
824 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
825 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
830 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool use_padding)
832 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth];)
835 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO) {
836 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
841 FLAC__StreamMetadata *padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
843 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
846 padding->length = iterator->length;
847 if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false)) {
848 FLAC__metadata_object_delete(padding);
851 FLAC__metadata_object_delete(padding);
852 if(!FLAC__metadata_simple_iterator_prev(iterator))
854 FLAC__ASSERT(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length == debug_target_offset);
855 FLAC__ASSERT(ftello(iterator->file) + (off_t)iterator->length == debug_target_offset);
859 ret = rewrite_whole_file_(iterator, 0, /*append=*/false);
860 FLAC__ASSERT(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length == debug_target_offset);
861 FLAC__ASSERT(ftello(iterator->file) + (off_t)iterator->length == debug_target_offset);
868 /****************************************************************************
870 * Level 2 implementation
872 ***************************************************************************/
875 typedef struct FLAC__Metadata_Node {
876 FLAC__StreamMetadata *data;
877 struct FLAC__Metadata_Node *prev, *next;
878 } FLAC__Metadata_Node;
880 struct FLAC__Metadata_Chain {
881 char *filename; /* will be NULL if using callbacks */
883 FLAC__Metadata_Node *head;
884 FLAC__Metadata_Node *tail;
886 FLAC__Metadata_ChainStatus status;
887 off_t first_offset, last_offset;
889 * This is the length of the chain initially read from the FLAC file.
890 * it is used to compare against the current length to decide whether
891 * or not the whole file has to be rewritten.
893 off_t initial_length;
894 /* @@@ hacky, these are currently only needed by ogg reader */
895 FLAC__IOHandle handle;
896 FLAC__IOCallback_Read read_cb;
899 struct FLAC__Metadata_Iterator {
900 FLAC__Metadata_Chain *chain;
901 FLAC__Metadata_Node *current;
904 FLAC_API const char * const FLAC__Metadata_ChainStatusString[] = {
905 "FLAC__METADATA_CHAIN_STATUS_OK",
906 "FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT",
907 "FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE",
908 "FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE",
909 "FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE",
910 "FLAC__METADATA_CHAIN_STATUS_BAD_METADATA",
911 "FLAC__METADATA_CHAIN_STATUS_READ_ERROR",
912 "FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR",
913 "FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR",
914 "FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR",
915 "FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR",
916 "FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR",
917 "FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR",
918 "FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS",
919 "FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH",
920 "FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL"
924 static FLAC__Metadata_Node *node_new_(void)
926 return calloc(1, sizeof(FLAC__Metadata_Node));
929 static void node_delete_(FLAC__Metadata_Node *node)
931 FLAC__ASSERT(0 != node);
933 FLAC__metadata_object_delete(node->data);
937 static void chain_init_(FLAC__Metadata_Chain *chain)
939 FLAC__ASSERT(0 != chain);
942 chain->is_ogg = false;
943 chain->head = chain->tail = 0;
945 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
946 chain->initial_length = 0;
950 static void chain_clear_(FLAC__Metadata_Chain *chain)
952 FLAC__Metadata_Node *node, *next;
954 FLAC__ASSERT(0 != chain);
956 for(node = chain->head; node; ) {
962 if(0 != chain->filename)
963 free(chain->filename);
968 static void chain_append_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
970 FLAC__ASSERT(0 != chain);
971 FLAC__ASSERT(0 != node);
972 FLAC__ASSERT(0 != node->data);
974 node->next = node->prev = 0;
975 node->data->is_last = true;
977 chain->tail->data->is_last = false;
982 FLAC__ASSERT(0 != chain->tail);
983 chain->tail->next = node;
984 node->prev = chain->tail;
990 static void chain_remove_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
992 FLAC__ASSERT(0 != chain);
993 FLAC__ASSERT(0 != node);
995 if(node == chain->head)
996 chain->head = node->next;
998 node->prev->next = node->next;
1000 if(node == chain->tail)
1001 chain->tail = node->prev;
1003 node->next->prev = node->prev;
1005 if(0 != chain->tail)
1006 chain->tail->data->is_last = true;
1011 static void chain_delete_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1013 chain_remove_node_(chain, node);
1017 static off_t chain_calculate_length_(FLAC__Metadata_Chain *chain)
1019 const FLAC__Metadata_Node *node;
1021 for(node = chain->head; node; node = node->next)
1022 length += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1026 static void iterator_insert_node_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1028 FLAC__ASSERT(0 != node);
1029 FLAC__ASSERT(0 != node->data);
1030 FLAC__ASSERT(0 != iterator);
1031 FLAC__ASSERT(0 != iterator->current);
1032 FLAC__ASSERT(0 != iterator->chain);
1033 FLAC__ASSERT(0 != iterator->chain->head);
1034 FLAC__ASSERT(0 != iterator->chain->tail);
1036 node->data->is_last = false;
1038 node->prev = iterator->current->prev;
1039 node->next = iterator->current;
1042 iterator->chain->head = node;
1044 node->prev->next = node;
1046 iterator->current->prev = node;
1048 iterator->chain->nodes++;
1051 static void iterator_insert_node_after_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1053 FLAC__ASSERT(0 != node);
1054 FLAC__ASSERT(0 != node->data);
1055 FLAC__ASSERT(0 != iterator);
1056 FLAC__ASSERT(0 != iterator->current);
1057 FLAC__ASSERT(0 != iterator->chain);
1058 FLAC__ASSERT(0 != iterator->chain->head);
1059 FLAC__ASSERT(0 != iterator->chain->tail);
1061 iterator->current->data->is_last = false;
1063 node->prev = iterator->current;
1064 node->next = iterator->current->next;
1067 iterator->chain->tail = node;
1069 node->next->prev = node;
1071 node->prev->next = node;
1073 iterator->chain->tail->data->is_last = true;
1075 iterator->chain->nodes++;
1078 /* return true iff node and node->next are both padding */
1079 static FLAC__bool chain_merge_adjacent_padding_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1081 if(node->data->type == FLAC__METADATA_TYPE_PADDING && 0 != node->next && node->next->data->type == FLAC__METADATA_TYPE_PADDING) {
1082 const unsigned growth = FLAC__STREAM_METADATA_HEADER_LENGTH + node->next->data->length;
1083 node->data->length += growth;
1085 chain_delete_node_(chain, node->next);
1092 /* Returns the new length of the chain, or 0 if there was an error. */
1093 /* WATCHOUT: This can get called multiple times before a write, so
1094 * it should still work when this happens.
1096 /* WATCHOUT: Make sure to also update the logic in
1097 * FLAC__metadata_chain_check_if_tempfile_needed() if the logic here changes.
1099 static off_t chain_prepare_for_write_(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1101 off_t current_length = chain_calculate_length_(chain);
1104 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1105 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1106 const off_t delta = chain->initial_length - current_length;
1107 chain->tail->data->length += delta;
1108 current_length += delta;
1109 FLAC__ASSERT(current_length == chain->initial_length);
1111 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1112 else if(current_length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) {
1113 FLAC__StreamMetadata *padding;
1114 FLAC__Metadata_Node *node;
1115 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) {
1116 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1119 padding->length = chain->initial_length - (FLAC__STREAM_METADATA_HEADER_LENGTH + current_length);
1120 if(0 == (node = node_new_())) {
1121 FLAC__metadata_object_delete(padding);
1122 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1125 node->data = padding;
1126 chain_append_node_(chain, node);
1127 current_length = chain_calculate_length_(chain);
1128 FLAC__ASSERT(current_length == chain->initial_length);
1130 /* 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 */
1131 else if(current_length > chain->initial_length) {
1132 const off_t delta = current_length - chain->initial_length;
1133 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1134 /* if the delta is exactly the size of the last padding block, remove the padding block */
1135 if((off_t)chain->tail->data->length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta) {
1136 chain_delete_node_(chain, chain->tail);
1137 current_length = chain_calculate_length_(chain);
1138 FLAC__ASSERT(current_length == chain->initial_length);
1140 /* if there is at least 'delta' bytes of padding, trim the padding down */
1141 else if((off_t)chain->tail->data->length >= delta) {
1142 chain->tail->data->length -= delta;
1143 current_length -= delta;
1144 FLAC__ASSERT(current_length == chain->initial_length);
1150 return current_length;
1153 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)
1155 FLAC__Metadata_Node *node;
1157 FLAC__ASSERT(0 != chain);
1159 /* we assume we're already at the beginning of the file */
1161 switch(seek_to_first_metadata_block_cb_(handle, read_cb, seek_cb)) {
1165 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1168 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1171 chain->status = FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
1179 FLAC__int64 pos = tell_cb(handle);
1181 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1184 chain->first_offset = (off_t)pos;
1189 FLAC__MetadataType type;
1195 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1199 if(!read_metadata_block_header_cb_(handle, read_cb, &is_last, &type, &length)) {
1201 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1205 node->data = FLAC__metadata_object_new(type);
1206 if(0 == node->data) {
1208 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1212 node->data->is_last = is_last;
1213 node->data->length = length;
1215 chain->status = get_equivalent_status_(read_metadata_block_data_cb_(handle, read_cb, seek_cb, node->data));
1216 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1220 chain_append_node_(chain, node);
1225 FLAC__int64 pos = tell_cb(handle);
1227 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1230 chain->last_offset = (off_t)pos;
1233 chain->initial_length = chain_calculate_length_(chain);
1238 static FLAC__StreamDecoderReadStatus chain_read_ogg_read_cb_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
1240 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1242 if(*bytes > 0 && chain->status == FLAC__METADATA_CHAIN_STATUS_OK) {
1243 *bytes = chain->read_cb(buffer, sizeof(FLAC__byte), *bytes, chain->handle);
1245 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
1247 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
1250 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
1253 static FLAC__StreamDecoderWriteStatus chain_read_ogg_write_cb_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
1255 (void)decoder, (void)frame, (void)buffer, (void)client_data;
1256 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1259 static void chain_read_ogg_metadata_cb_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
1261 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1262 FLAC__Metadata_Node *node;
1268 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1272 node->data = FLAC__metadata_object_clone(metadata);
1273 if(0 == node->data) {
1275 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1279 chain_append_node_(chain, node);
1282 static void chain_read_ogg_error_cb_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1284 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1285 (void)decoder, (void)status;
1286 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1289 static FLAC__bool chain_read_ogg_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb)
1291 FLAC__StreamDecoder *decoder;
1293 FLAC__ASSERT(0 != chain);
1295 /* we assume we're already at the beginning of the file */
1297 chain->handle = handle;
1298 chain->read_cb = read_cb;
1299 if(0 == (decoder = FLAC__stream_decoder_new())) {
1300 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1303 FLAC__stream_decoder_set_metadata_respond_all(decoder);
1304 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) {
1305 FLAC__stream_decoder_delete(decoder);
1306 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1310 chain->first_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1312 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder))
1313 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1314 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1315 FLAC__stream_decoder_delete(decoder);
1319 FLAC__stream_decoder_delete(decoder);
1321 chain->last_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1323 chain->initial_length = chain_calculate_length_(chain);
1328 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)
1330 FLAC__Metadata_Node *node;
1332 FLAC__ASSERT(0 != chain);
1333 FLAC__ASSERT(0 != chain->head);
1335 if(0 != seek_cb(handle, chain->first_offset, SEEK_SET)) {
1336 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1340 for(node = chain->head; node; node = node->next) {
1341 if(!write_metadata_block_header_cb_(handle, write_cb, node->data)) {
1342 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1345 if(!write_metadata_block_data_cb_(handle, write_cb, node->data)) {
1346 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1351 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1353 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1357 static FLAC__bool chain_rewrite_metadata_in_place_(FLAC__Metadata_Chain *chain)
1362 FLAC__ASSERT(0 != chain->filename);
1364 if(0 == (file = fopen(chain->filename, "r+b"))) {
1365 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1369 /* chain_rewrite_metadata_in_place_cb_() sets chain->status for us */
1370 ret = chain_rewrite_metadata_in_place_cb_(chain, (FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, fseek_wrapper_);
1377 static FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix)
1381 FLAC__Metadata_SimpleIteratorStatus status;
1382 const FLAC__Metadata_Node *node;
1384 FLAC__ASSERT(0 != chain);
1385 FLAC__ASSERT(0 != chain->filename);
1386 FLAC__ASSERT(0 != chain->head);
1388 /* copy the file prefix (data up to first metadata block */
1389 if(0 == (f = fopen(chain->filename, "rb"))) {
1390 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1393 if(!open_tempfile_(chain->filename, tempfile_path_prefix, &tempfile, &tempfilename, &status)) {
1394 chain->status = get_equivalent_status_(status);
1397 if(!copy_n_bytes_from_file_(f, tempfile, chain->first_offset, &status)) {
1398 chain->status = get_equivalent_status_(status);
1402 /* write the metadata */
1403 for(node = chain->head; node; node = node->next) {
1404 if(!write_metadata_block_header_(tempfile, &status, node->data)) {
1405 chain->status = get_equivalent_status_(status);
1408 if(!write_metadata_block_data_(tempfile, &status, node->data)) {
1409 chain->status = get_equivalent_status_(status);
1413 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1415 /* copy the file postfix (everything after the metadata) */
1416 if(0 != fseeko(f, chain->last_offset, SEEK_SET)) {
1417 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1420 if(!copy_remaining_bytes_from_file_(f, tempfile, &status)) {
1421 chain->status = get_equivalent_status_(status);
1425 /* move the tempfile on top of the original */
1427 if(!transport_tempfile_(chain->filename, &tempfile, &tempfilename, &status))
1434 cleanup_tempfile_(&tempfile, &tempfilename);
1438 /* assumes 'handle' is already at beginning of file */
1439 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)
1441 FLAC__Metadata_SimpleIteratorStatus status;
1442 const FLAC__Metadata_Node *node;
1444 FLAC__ASSERT(0 != chain);
1445 FLAC__ASSERT(0 == chain->filename);
1446 FLAC__ASSERT(0 != chain->head);
1448 /* copy the file prefix (data up to first metadata block */
1449 if(!copy_n_bytes_from_file_cb_(handle, read_cb, temp_handle, temp_write_cb, chain->first_offset, &status)) {
1450 chain->status = get_equivalent_status_(status);
1454 /* write the metadata */
1455 for(node = chain->head; node; node = node->next) {
1456 if(!write_metadata_block_header_cb_(temp_handle, temp_write_cb, node->data)) {
1457 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1460 if(!write_metadata_block_data_cb_(temp_handle, temp_write_cb, node->data)) {
1461 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1465 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1467 /* copy the file postfix (everything after the metadata) */
1468 if(0 != seek_cb(handle, chain->last_offset, SEEK_SET)) {
1469 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1472 if(!copy_remaining_bytes_from_file_cb_(handle, read_cb, eof_cb, temp_handle, temp_write_cb, &status)) {
1473 chain->status = get_equivalent_status_(status);
1480 FLAC_API FLAC__Metadata_Chain *FLAC__metadata_chain_new(void)
1482 FLAC__Metadata_Chain *chain = calloc(1, sizeof(FLAC__Metadata_Chain));
1490 FLAC_API void FLAC__metadata_chain_delete(FLAC__Metadata_Chain *chain)
1492 FLAC__ASSERT(0 != chain);
1494 chain_clear_(chain);
1499 FLAC_API FLAC__Metadata_ChainStatus FLAC__metadata_chain_status(FLAC__Metadata_Chain *chain)
1501 FLAC__Metadata_ChainStatus status;
1503 FLAC__ASSERT(0 != chain);
1505 status = chain->status;
1506 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1510 static FLAC__bool chain_read_(FLAC__Metadata_Chain *chain, const char *filename, FLAC__bool is_ogg)
1515 FLAC__ASSERT(0 != chain);
1516 FLAC__ASSERT(0 != filename);
1518 chain_clear_(chain);
1520 if(0 == (chain->filename = strdup(filename))) {
1521 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1525 chain->is_ogg = is_ogg;
1527 if(0 == (file = fopen(filename, "rb"))) {
1528 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1532 /* the function also sets chain->status for us */
1534 chain_read_ogg_cb_(chain, file, (FLAC__IOCallback_Read)fread) :
1535 chain_read_cb_(chain, file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, ftell_wrapper_)
1543 FLAC_API FLAC__bool FLAC__metadata_chain_read(FLAC__Metadata_Chain *chain, const char *filename)
1545 return chain_read_(chain, filename, /*is_ogg=*/false);
1548 /*@@@@add to tests*/
1549 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg(FLAC__Metadata_Chain *chain, const char *filename)
1551 return chain_read_(chain, filename, /*is_ogg=*/true);
1554 static FLAC__bool chain_read_with_callbacks_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks, FLAC__bool is_ogg)
1558 FLAC__ASSERT(0 != chain);
1560 chain_clear_(chain);
1562 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.tell) {
1563 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1567 chain->is_ogg = is_ogg;
1570 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1571 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1575 /* the function also sets chain->status for us */
1577 chain_read_ogg_cb_(chain, handle, callbacks.read) :
1578 chain_read_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.tell)
1584 FLAC_API FLAC__bool FLAC__metadata_chain_read_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1586 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/false);
1589 /*@@@@add to tests*/
1590 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1592 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/true);
1595 FLAC_API FLAC__bool FLAC__metadata_chain_check_if_tempfile_needed(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1597 /* This does all the same checks that are in chain_prepare_for_write_()
1598 * but doesn't actually alter the chain. Make sure to update the logic
1599 * here if chain_prepare_for_write_() changes.
1601 const off_t current_length = chain_calculate_length_(chain);
1603 FLAC__ASSERT(0 != chain);
1606 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1607 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING)
1609 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1610 else if(current_length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length)
1612 /* 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 */
1613 else if(current_length > chain->initial_length) {
1614 const off_t delta = current_length - chain->initial_length;
1615 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1616 /* if the delta is exactly the size of the last padding block, remove the padding block */
1617 if((off_t)chain->tail->data->length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta)
1619 /* if there is at least 'delta' bytes of padding, trim the padding down */
1620 else if((off_t)chain->tail->data->length >= delta)
1626 return (current_length != chain->initial_length);
1629 FLAC_API FLAC__bool FLAC__metadata_chain_write(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats)
1632 const char *tempfile_path_prefix = 0;
1633 off_t current_length;
1635 FLAC__ASSERT(0 != chain);
1637 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1638 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1642 if (0 == chain->filename) {
1643 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1647 current_length = chain_prepare_for_write_(chain, use_padding);
1649 /* a return value of 0 means there was an error; chain->status is already set */
1650 if (0 == current_length)
1653 if(preserve_file_stats)
1654 get_file_stats_(chain->filename, &stats);
1656 if(current_length == chain->initial_length) {
1657 if(!chain_rewrite_metadata_in_place_(chain))
1661 if(!chain_rewrite_file_(chain, tempfile_path_prefix))
1664 /* recompute lengths and offsets */
1666 const FLAC__Metadata_Node *node;
1667 chain->initial_length = current_length;
1668 chain->last_offset = chain->first_offset;
1669 for(node = chain->head; node; node = node->next)
1670 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1674 if(preserve_file_stats)
1675 set_file_stats_(chain->filename, &stats);
1680 FLAC_API FLAC__bool FLAC__metadata_chain_write_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1682 off_t current_length;
1684 FLAC__ASSERT(0 != chain);
1686 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1687 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1691 if (0 != chain->filename) {
1692 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1696 if (0 == callbacks.write || 0 == callbacks.seek) {
1697 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1701 if (FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1702 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1706 current_length = chain_prepare_for_write_(chain, use_padding);
1708 /* a return value of 0 means there was an error; chain->status is already set */
1709 if (0 == current_length)
1712 FLAC__ASSERT(current_length == chain->initial_length);
1714 return chain_rewrite_metadata_in_place_cb_(chain, handle, callbacks.write, callbacks.seek);
1717 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)
1719 off_t current_length;
1721 FLAC__ASSERT(0 != chain);
1723 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1724 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1728 if (0 != chain->filename) {
1729 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1733 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.eof) {
1734 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1737 if (0 == temp_callbacks.write) {
1738 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1742 if (!FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1743 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1747 current_length = chain_prepare_for_write_(chain, use_padding);
1749 /* a return value of 0 means there was an error; chain->status is already set */
1750 if (0 == current_length)
1753 FLAC__ASSERT(current_length != chain->initial_length);
1756 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1757 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1761 if(!chain_rewrite_file_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.eof, temp_handle, temp_callbacks.write))
1764 /* recompute lengths and offsets */
1766 const FLAC__Metadata_Node *node;
1767 chain->initial_length = current_length;
1768 chain->last_offset = chain->first_offset;
1769 for(node = chain->head; node; node = node->next)
1770 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1776 FLAC_API void FLAC__metadata_chain_merge_padding(FLAC__Metadata_Chain *chain)
1778 FLAC__Metadata_Node *node;
1780 FLAC__ASSERT(0 != chain);
1782 for(node = chain->head; node; ) {
1783 if(!chain_merge_adjacent_padding_(chain, node))
1788 FLAC_API void FLAC__metadata_chain_sort_padding(FLAC__Metadata_Chain *chain)
1790 FLAC__Metadata_Node *node, *save;
1793 FLAC__ASSERT(0 != chain);
1796 * Don't try and be too smart... this simple algo is good enough for
1797 * the small number of nodes that we deal with.
1799 for(i = 0, node = chain->head; i < chain->nodes; i++) {
1800 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1802 chain_remove_node_(chain, node);
1803 chain_append_node_(chain, node);
1811 FLAC__metadata_chain_merge_padding(chain);
1815 FLAC_API FLAC__Metadata_Iterator *FLAC__metadata_iterator_new(void)
1817 FLAC__Metadata_Iterator *iterator = calloc(1, sizeof(FLAC__Metadata_Iterator));
1819 /* calloc() implies:
1820 iterator->current = 0;
1821 iterator->chain = 0;
1827 FLAC_API void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator)
1829 FLAC__ASSERT(0 != iterator);
1834 FLAC_API void FLAC__metadata_iterator_init(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Chain *chain)
1836 FLAC__ASSERT(0 != iterator);
1837 FLAC__ASSERT(0 != chain);
1838 FLAC__ASSERT(0 != chain->head);
1840 iterator->chain = chain;
1841 iterator->current = chain->head;
1844 FLAC_API FLAC__bool FLAC__metadata_iterator_next(FLAC__Metadata_Iterator *iterator)
1846 FLAC__ASSERT(0 != iterator);
1848 if(0 == iterator->current || 0 == iterator->current->next)
1851 iterator->current = iterator->current->next;
1855 FLAC_API FLAC__bool FLAC__metadata_iterator_prev(FLAC__Metadata_Iterator *iterator)
1857 FLAC__ASSERT(0 != iterator);
1859 if(0 == iterator->current || 0 == iterator->current->prev)
1862 iterator->current = iterator->current->prev;
1866 FLAC_API FLAC__MetadataType FLAC__metadata_iterator_get_block_type(const FLAC__Metadata_Iterator *iterator)
1868 FLAC__ASSERT(0 != iterator);
1869 FLAC__ASSERT(0 != iterator->current);
1870 FLAC__ASSERT(0 != iterator->current->data);
1872 return iterator->current->data->type;
1875 FLAC_API FLAC__StreamMetadata *FLAC__metadata_iterator_get_block(FLAC__Metadata_Iterator *iterator)
1877 FLAC__ASSERT(0 != iterator);
1878 FLAC__ASSERT(0 != iterator->current);
1880 return iterator->current->data;
1883 FLAC_API FLAC__bool FLAC__metadata_iterator_set_block(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1885 FLAC__ASSERT(0 != iterator);
1886 FLAC__ASSERT(0 != block);
1887 return FLAC__metadata_iterator_delete_block(iterator, false) && FLAC__metadata_iterator_insert_block_after(iterator, block);
1890 FLAC_API FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__Metadata_Iterator *iterator, FLAC__bool replace_with_padding)
1892 FLAC__Metadata_Node *save;
1894 FLAC__ASSERT(0 != iterator);
1895 FLAC__ASSERT(0 != iterator->current);
1897 if(0 == iterator->current->prev) {
1898 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1902 save = iterator->current->prev;
1904 if(replace_with_padding) {
1905 FLAC__metadata_object_delete_data(iterator->current->data);
1906 iterator->current->data->type = FLAC__METADATA_TYPE_PADDING;
1909 chain_delete_node_(iterator->chain, iterator->current);
1912 iterator->current = save;
1916 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1918 FLAC__Metadata_Node *node;
1920 FLAC__ASSERT(0 != iterator);
1921 FLAC__ASSERT(0 != iterator->current);
1922 FLAC__ASSERT(0 != block);
1924 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1927 if(0 == iterator->current->prev) {
1928 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1932 if(0 == (node = node_new_()))
1936 iterator_insert_node_(iterator, node);
1937 iterator->current = node;
1941 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1943 FLAC__Metadata_Node *node;
1945 FLAC__ASSERT(0 != iterator);
1946 FLAC__ASSERT(0 != iterator->current);
1947 FLAC__ASSERT(0 != block);
1949 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1952 if(0 == (node = node_new_()))
1956 iterator_insert_node_after_(iterator, node);
1957 iterator->current = node;
1962 /****************************************************************************
1964 * Local function definitions
1966 ***************************************************************************/
1968 void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1974 for(i = 0; i < bytes; i++) {
1975 *(--b) = (FLAC__byte)(val & 0xff);
1980 void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1984 for(i = 0; i < bytes; i++) {
1985 *(b++) = (FLAC__byte)(val & 0xff);
1990 void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes)
1996 for(i = 0; i < bytes; i++) {
1997 *(--b) = (FLAC__byte)(val & 0xff);
2002 FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes)
2004 FLAC__uint32 ret = 0;
2007 for(i = 0; i < bytes; i++)
2008 ret = (ret << 8) | (FLAC__uint32)(*b++);
2013 FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes)
2015 FLAC__uint32 ret = 0;
2020 for(i = 0; i < bytes; i++)
2021 ret = (ret << 8) | (FLAC__uint32)(*--b);
2026 FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes)
2028 FLAC__uint64 ret = 0;
2031 for(i = 0; i < bytes; i++)
2032 ret = (ret << 8) | (FLAC__uint64)(*b++);
2037 FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator)
2039 FLAC__ASSERT(0 != iterator);
2040 FLAC__ASSERT(0 != iterator->file);
2042 if(!read_metadata_block_header_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, &iterator->is_last, &iterator->type, &iterator->length)) {
2043 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2050 FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block)
2052 FLAC__ASSERT(0 != iterator);
2053 FLAC__ASSERT(0 != iterator->file);
2055 iterator->status = read_metadata_block_data_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, block);
2057 return (iterator->status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK);
2060 FLAC__bool read_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__bool *is_last, FLAC__MetadataType *type, unsigned *length)
2062 FLAC__byte raw_header[FLAC__STREAM_METADATA_HEADER_LENGTH];
2064 if(read_cb(raw_header, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2067 *is_last = raw_header[0] & 0x80? true : false;
2068 *type = (FLAC__MetadataType)(raw_header[0] & 0x7f);
2069 *length = unpack_uint32_(raw_header + 1, 3);
2071 /* Note that we don't check:
2072 * if(iterator->type >= FLAC__METADATA_TYPE_UNDEFINED)
2073 * we just will read in an opaque block
2079 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata *block)
2081 switch(block->type) {
2082 case FLAC__METADATA_TYPE_STREAMINFO:
2083 return read_metadata_block_data_streaminfo_cb_(handle, read_cb, &block->data.stream_info);
2084 case FLAC__METADATA_TYPE_PADDING:
2085 return read_metadata_block_data_padding_cb_(handle, seek_cb, &block->data.padding, block->length);
2086 case FLAC__METADATA_TYPE_APPLICATION:
2087 return read_metadata_block_data_application_cb_(handle, read_cb, &block->data.application, block->length);
2088 case FLAC__METADATA_TYPE_SEEKTABLE:
2089 return read_metadata_block_data_seektable_cb_(handle, read_cb, &block->data.seek_table, block->length);
2090 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2091 return read_metadata_block_data_vorbis_comment_cb_(handle, read_cb, &block->data.vorbis_comment);
2092 case FLAC__METADATA_TYPE_CUESHEET:
2093 return read_metadata_block_data_cuesheet_cb_(handle, read_cb, &block->data.cue_sheet);
2094 case FLAC__METADATA_TYPE_PICTURE:
2095 return read_metadata_block_data_picture_cb_(handle, read_cb, &block->data.picture);
2097 return read_metadata_block_data_unknown_cb_(handle, read_cb, &block->data.unknown, block->length);
2101 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block)
2103 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH], *b;
2105 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2106 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2110 /* we are using hardcoded numbers for simplicity but we should
2111 * probably eventually write a bit-level unpacker and use the
2112 * _STREAMINFO_ constants.
2114 block->min_blocksize = unpack_uint32_(b, 2); b += 2;
2115 block->max_blocksize = unpack_uint32_(b, 2); b += 2;
2116 block->min_framesize = unpack_uint32_(b, 3); b += 3;
2117 block->max_framesize = unpack_uint32_(b, 3); b += 3;
2118 block->sample_rate = (unpack_uint32_(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4);
2119 block->channels = (unsigned)((b[2] & 0x0e) >> 1) + 1;
2120 block->bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 4) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1;
2121 block->total_samples = (((FLAC__uint64)(b[3] & 0x0f)) << 32) | unpack_uint64_(b+4, 4);
2122 memcpy(block->md5sum, b+8, 16);
2124 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2127 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_Padding *block, unsigned block_length)
2129 (void)block; /* nothing to do; we don't care about reading the padding bytes */
2131 if(0 != seek_cb(handle, block_length, SEEK_CUR))
2132 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2134 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2137 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Application *block, unsigned block_length)
2139 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2141 if(read_cb(block->id, 1, id_bytes, handle) != id_bytes)
2142 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2144 if(block_length < id_bytes)
2145 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2147 block_length -= id_bytes;
2149 if(block_length == 0) {
2153 if(0 == (block->data = malloc(block_length)))
2154 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2156 if(read_cb(block->data, 1, block_length, handle) != block_length)
2157 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2160 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2163 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_SeekTable *block, unsigned block_length)
2166 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2168 FLAC__ASSERT(block_length % FLAC__STREAM_METADATA_SEEKPOINT_LENGTH == 0);
2170 block->num_points = block_length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
2172 if(block->num_points == 0)
2174 else if(0 == (block->points = safe_malloc_mul_2op_p(block->num_points, /*times*/sizeof(FLAC__StreamMetadata_SeekPoint))))
2175 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2177 for(i = 0; i < block->num_points; i++) {
2178 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2179 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2180 /* some MAGIC NUMBERs here */
2181 block->points[i].sample_number = unpack_uint64_(buffer, 8);
2182 block->points[i].stream_offset = unpack_uint64_(buffer+8, 8);
2183 block->points[i].frame_samples = unpack_uint32_(buffer+16, 2);
2186 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2189 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment_Entry *entry)
2191 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2192 FLAC__byte buffer[4]; /* magic number is asserted below */
2194 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8 == sizeof(buffer));
2196 if(read_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2197 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2198 entry->length = unpack_uint32_little_endian_(buffer, entry_length_len);
2200 if(0 != entry->entry)
2203 if(entry->length == 0) {
2207 if(0 == (entry->entry = safe_malloc_add_2op_(entry->length, /*+*/1)))
2208 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2210 if(read_cb(entry->entry, 1, entry->length, handle) != entry->length)
2211 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2213 entry->entry[entry->length] = '\0';
2216 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2219 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment *block)
2222 FLAC__Metadata_SimpleIteratorStatus status;
2223 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2224 FLAC__byte buffer[4]; /* magic number is asserted below */
2226 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8 == sizeof(buffer));
2228 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, &(block->vendor_string))))
2231 if(read_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2232 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2233 block->num_comments = unpack_uint32_little_endian_(buffer, num_comments_len);
2235 if(block->num_comments == 0) {
2236 block->comments = 0;
2238 else if(0 == (block->comments = calloc(block->num_comments, sizeof(FLAC__StreamMetadata_VorbisComment_Entry))))
2239 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2241 for(i = 0; i < block->num_comments; i++) {
2242 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, block->comments + i)))
2246 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2249 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track)
2252 FLAC__byte buffer[32]; /* asserted below that this is big enough */
2254 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2255 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2256 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);
2258 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2259 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2260 if(read_cb(buffer, 1, len, handle) != len)
2261 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2262 track->offset = unpack_uint64_(buffer, len);
2264 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2265 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2266 if(read_cb(buffer, 1, len, handle) != len)
2267 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2268 track->number = (FLAC__byte)unpack_uint32_(buffer, len);
2270 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2271 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2272 if(read_cb(track->isrc, 1, len, handle) != len)
2273 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2275 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);
2276 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2277 if(read_cb(buffer, 1, len, handle) != len)
2278 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2279 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN == 1);
2280 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN == 1);
2281 track->type = buffer[0] >> 7;
2282 track->pre_emphasis = (buffer[0] >> 6) & 1;
2284 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2285 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2286 if(read_cb(buffer, 1, len, handle) != len)
2287 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2288 track->num_indices = (FLAC__byte)unpack_uint32_(buffer, len);
2290 if(track->num_indices == 0) {
2293 else if(0 == (track->indices = calloc(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index))))
2294 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2296 for(i = 0; i < track->num_indices; i++) {
2297 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2298 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2299 if(read_cb(buffer, 1, len, handle) != len)
2300 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2301 track->indices[i].offset = unpack_uint64_(buffer, len);
2303 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2304 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2305 if(read_cb(buffer, 1, len, handle) != len)
2306 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2307 track->indices[i].number = (FLAC__byte)unpack_uint32_(buffer, len);
2309 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2310 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2311 if(read_cb(buffer, 1, len, handle) != len)
2312 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2315 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2318 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block)
2321 FLAC__Metadata_SimpleIteratorStatus status;
2322 FLAC__byte buffer[1024]; /* MSVC needs a constant expression so we put a magic number and assert */
2324 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN)/8 <= sizeof(buffer));
2325 FLAC__ASSERT(sizeof(FLAC__uint64) <= sizeof(buffer));
2327 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2328 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2329 if(read_cb(block->media_catalog_number, 1, len, handle) != len)
2330 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2332 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2333 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2334 if(read_cb(buffer, 1, len, handle) != len)
2335 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2336 block->lead_in = unpack_uint64_(buffer, len);
2338 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2339 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2340 if(read_cb(buffer, 1, len, handle) != len)
2341 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2342 block->is_cd = buffer[0]&0x80? true : false;
2344 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2345 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2346 if(read_cb(buffer, 1, len, handle) != len)
2347 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2348 block->num_tracks = unpack_uint32_(buffer, len);
2350 if(block->num_tracks == 0) {
2353 else if(0 == (block->tracks = calloc(block->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track))))
2354 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2356 for(i = 0; i < block->num_tracks; i++) {
2357 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_cuesheet_track_cb_(handle, read_cb, block->tracks + i)))
2361 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2364 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)
2366 FLAC__byte buffer[sizeof(FLAC__uint32)];
2368 FLAC__ASSERT(0 != data);
2369 FLAC__ASSERT(length_len%8 == 0);
2371 length_len /= 8; /* convert to bytes */
2373 FLAC__ASSERT(sizeof(buffer) >= length_len);
2375 if(read_cb(buffer, 1, length_len, handle) != length_len)
2376 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2377 *length = unpack_uint32_(buffer, length_len);
2382 if(0 == (*data = safe_malloc_add_2op_(*length, /*+*/1)))
2383 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2386 if(read_cb(*data, 1, *length, handle) != *length)
2387 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2390 (*data)[*length] = '\0';
2392 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2395 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block)
2397 FLAC__Metadata_SimpleIteratorStatus status;
2398 FLAC__byte buffer[4]; /* asserted below that this is big enough */
2401 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2402 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2403 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2404 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2405 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2407 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_TYPE_LEN % 8 == 0);
2408 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN / 8;
2409 if(read_cb(buffer, 1, len, handle) != len)
2410 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2411 block->type = (FLAC__StreamMetadata_Picture_Type)unpack_uint32_(buffer, len);
2413 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)
2416 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)
2419 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN % 8 == 0);
2420 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN / 8;
2421 if(read_cb(buffer, 1, len, handle) != len)
2422 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2423 block->width = unpack_uint32_(buffer, len);
2425 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN % 8 == 0);
2426 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN / 8;
2427 if(read_cb(buffer, 1, len, handle) != len)
2428 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2429 block->height = unpack_uint32_(buffer, len);
2431 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN % 8 == 0);
2432 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN / 8;
2433 if(read_cb(buffer, 1, len, handle) != len)
2434 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2435 block->depth = unpack_uint32_(buffer, len);
2437 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_COLORS_LEN % 8 == 0);
2438 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN / 8;
2439 if(read_cb(buffer, 1, len, handle) != len)
2440 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2441 block->colors = unpack_uint32_(buffer, len);
2443 /* for convenience we use read_metadata_block_data_picture_cstring_cb_() even though it adds an extra terminating NUL we don't use */
2444 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)
2447 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2450 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2452 if(block_length == 0) {
2456 if(0 == (block->data = malloc(block_length)))
2457 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2459 if(read_cb(block->data, 1, block_length, handle) != block_length)
2460 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2463 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2466 FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2468 FLAC__ASSERT(0 != file);
2469 FLAC__ASSERT(0 != status);
2471 if(!write_metadata_block_header_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2472 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2479 FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2481 FLAC__ASSERT(0 != file);
2482 FLAC__ASSERT(0 != status);
2484 if (write_metadata_block_data_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2485 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2489 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2494 FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2496 FLAC__byte buffer[FLAC__STREAM_METADATA_HEADER_LENGTH];
2498 FLAC__ASSERT(block->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
2500 buffer[0] = (block->is_last? 0x80 : 0) | (FLAC__byte)block->type;
2501 pack_uint32_(block->length, buffer + 1, 3);
2503 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2509 FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2511 FLAC__ASSERT(0 != block);
2513 switch(block->type) {
2514 case FLAC__METADATA_TYPE_STREAMINFO:
2515 return write_metadata_block_data_streaminfo_cb_(handle, write_cb, &block->data.stream_info);
2516 case FLAC__METADATA_TYPE_PADDING:
2517 return write_metadata_block_data_padding_cb_(handle, write_cb, &block->data.padding, block->length);
2518 case FLAC__METADATA_TYPE_APPLICATION:
2519 return write_metadata_block_data_application_cb_(handle, write_cb, &block->data.application, block->length);
2520 case FLAC__METADATA_TYPE_SEEKTABLE:
2521 return write_metadata_block_data_seektable_cb_(handle, write_cb, &block->data.seek_table);
2522 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2523 return write_metadata_block_data_vorbis_comment_cb_(handle, write_cb, &block->data.vorbis_comment);
2524 case FLAC__METADATA_TYPE_CUESHEET:
2525 return write_metadata_block_data_cuesheet_cb_(handle, write_cb, &block->data.cue_sheet);
2526 case FLAC__METADATA_TYPE_PICTURE:
2527 return write_metadata_block_data_picture_cb_(handle, write_cb, &block->data.picture);
2529 return write_metadata_block_data_unknown_cb_(handle, write_cb, &block->data.unknown, block->length);
2533 FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block)
2535 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH];
2536 const unsigned channels1 = block->channels - 1;
2537 const unsigned bps1 = block->bits_per_sample - 1;
2539 /* we are using hardcoded numbers for simplicity but we should
2540 * probably eventually write a bit-level packer and use the
2541 * _STREAMINFO_ constants.
2543 pack_uint32_(block->min_blocksize, buffer, 2);
2544 pack_uint32_(block->max_blocksize, buffer+2, 2);
2545 pack_uint32_(block->min_framesize, buffer+4, 3);
2546 pack_uint32_(block->max_framesize, buffer+7, 3);
2547 buffer[10] = (block->sample_rate >> 12) & 0xff;
2548 buffer[11] = (block->sample_rate >> 4) & 0xff;
2549 buffer[12] = ((block->sample_rate & 0x0f) << 4) | (channels1 << 1) | (bps1 >> 4);
2550 buffer[13] = (FLAC__byte)(((bps1 & 0x0f) << 4) | ((block->total_samples >> 32) & 0x0f));
2551 pack_uint32_((FLAC__uint32)block->total_samples, buffer+14, 4);
2552 memcpy(buffer+18, block->md5sum, 16);
2554 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2560 FLAC__bool write_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Padding *block, unsigned block_length)
2562 unsigned i, n = block_length;
2563 FLAC__byte buffer[1024];
2567 memset(buffer, 0, 1024);
2569 for(i = 0; i < n/1024; i++)
2570 if(write_cb(buffer, 1, 1024, handle) != 1024)
2575 if(write_cb(buffer, 1, n, handle) != n)
2581 FLAC__bool write_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Application *block, unsigned block_length)
2583 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2585 if(write_cb(block->id, 1, id_bytes, handle) != id_bytes)
2588 block_length -= id_bytes;
2590 if(write_cb(block->data, 1, block_length, handle) != block_length)
2596 FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block)
2599 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2601 for(i = 0; i < block->num_points; i++) {
2602 /* some MAGIC NUMBERs here */
2603 pack_uint64_(block->points[i].sample_number, buffer, 8);
2604 pack_uint64_(block->points[i].stream_offset, buffer+8, 8);
2605 pack_uint32_(block->points[i].frame_samples, buffer+16, 2);
2606 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2613 FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block)
2616 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2617 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2618 FLAC__byte buffer[4]; /* magic number is asserted below */
2620 FLAC__ASSERT(flac_max(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN, FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8 == sizeof(buffer));
2622 pack_uint32_little_endian_(block->vendor_string.length, buffer, entry_length_len);
2623 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2625 if(write_cb(block->vendor_string.entry, 1, block->vendor_string.length, handle) != block->vendor_string.length)
2628 pack_uint32_little_endian_(block->num_comments, buffer, num_comments_len);
2629 if(write_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2632 for(i = 0; i < block->num_comments; i++) {
2633 pack_uint32_little_endian_(block->comments[i].length, buffer, entry_length_len);
2634 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2636 if(write_cb(block->comments[i].entry, 1, block->comments[i].length, handle) != block->comments[i].length)
2643 FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block)
2646 FLAC__byte buffer[1024]; /* asserted below that this is big enough */
2648 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2649 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN/8);
2650 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);
2651 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2653 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2654 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2655 if(write_cb(block->media_catalog_number, 1, len, handle) != len)
2658 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2659 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2660 pack_uint64_(block->lead_in, buffer, len);
2661 if(write_cb(buffer, 1, len, handle) != len)
2664 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2665 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2666 memset(buffer, 0, len);
2669 if(write_cb(buffer, 1, len, handle) != len)
2672 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2673 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2674 pack_uint32_(block->num_tracks, buffer, len);
2675 if(write_cb(buffer, 1, len, handle) != len)
2678 for(i = 0; i < block->num_tracks; i++) {
2679 FLAC__StreamMetadata_CueSheet_Track *track = block->tracks + i;
2681 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2682 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2683 pack_uint64_(track->offset, buffer, len);
2684 if(write_cb(buffer, 1, len, handle) != len)
2687 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2688 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2689 pack_uint32_(track->number, buffer, len);
2690 if(write_cb(buffer, 1, len, handle) != len)
2693 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2694 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2695 if(write_cb(track->isrc, 1, len, handle) != len)
2698 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);
2699 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2700 memset(buffer, 0, len);
2701 buffer[0] = (track->type << 7) | (track->pre_emphasis << 6);
2702 if(write_cb(buffer, 1, len, handle) != len)
2705 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2706 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2707 pack_uint32_(track->num_indices, buffer, len);
2708 if(write_cb(buffer, 1, len, handle) != len)
2711 for(j = 0; j < track->num_indices; j++) {
2712 FLAC__StreamMetadata_CueSheet_Index *index = track->indices + j;
2714 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2715 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2716 pack_uint64_(index->offset, buffer, len);
2717 if(write_cb(buffer, 1, len, handle) != len)
2720 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2721 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2722 pack_uint32_(index->number, buffer, len);
2723 if(write_cb(buffer, 1, len, handle) != len)
2726 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2727 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2728 memset(buffer, 0, len);
2729 if(write_cb(buffer, 1, len, handle) != len)
2737 FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block)
2741 FLAC__byte buffer[4]; /* magic number is asserted below */
2743 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_TYPE_LEN%8);
2744 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN%8);
2745 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN%8);
2746 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN%8);
2747 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN%8);
2748 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN%8);
2749 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_COLORS_LEN%8);
2750 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN%8);
2751 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2752 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8);
2753 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8);
2754 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2755 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2756 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2757 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2758 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8);
2760 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8;
2761 pack_uint32_(block->type, buffer, len);
2762 if(write_cb(buffer, 1, len, handle) != len)
2765 len = FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8;
2766 slen = strlen(block->mime_type);
2767 pack_uint32_(slen, buffer, len);
2768 if(write_cb(buffer, 1, len, handle) != len)
2770 if(write_cb(block->mime_type, 1, slen, handle) != slen)
2773 len = FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8;
2774 slen = strlen((const char *)block->description);
2775 pack_uint32_(slen, buffer, len);
2776 if(write_cb(buffer, 1, len, handle) != len)
2778 if(write_cb(block->description, 1, slen, handle) != slen)
2781 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8;
2782 pack_uint32_(block->width, buffer, len);
2783 if(write_cb(buffer, 1, len, handle) != len)
2786 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8;
2787 pack_uint32_(block->height, buffer, len);
2788 if(write_cb(buffer, 1, len, handle) != len)
2791 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8;
2792 pack_uint32_(block->depth, buffer, len);
2793 if(write_cb(buffer, 1, len, handle) != len)
2796 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8;
2797 pack_uint32_(block->colors, buffer, len);
2798 if(write_cb(buffer, 1, len, handle) != len)
2801 len = FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8;
2802 pack_uint32_(block->data_length, buffer, len);
2803 if(write_cb(buffer, 1, len, handle) != len)
2805 if(write_cb(block->data, 1, block->data_length, handle) != block->data_length)
2811 FLAC__bool write_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2813 if(write_cb(block->data, 1, block_length, handle) != block_length)
2819 FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block)
2821 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2822 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2826 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2829 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2832 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2833 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2837 return read_metadata_block_header_(iterator);
2840 FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last)
2842 FLAC__StreamMetadata *padding;
2844 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2845 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2849 block->is_last = false;
2851 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2854 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2857 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
2858 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2860 padding->is_last = padding_is_last;
2861 padding->length = padding_length;
2863 if(!write_metadata_block_header_(iterator->file, &iterator->status, padding)) {
2864 FLAC__metadata_object_delete(padding);
2868 if(!write_metadata_block_data_(iterator->file, &iterator->status, padding)) {
2869 FLAC__metadata_object_delete(padding);
2873 FLAC__metadata_object_delete(padding);
2875 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2876 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2880 return read_metadata_block_header_(iterator);
2883 FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append)
2885 FILE *tempfile = NULL;
2886 char *tempfilename = NULL;
2887 int fixup_is_last_code = 0; /* 0 => no need to change any is_last flags */
2888 off_t fixup_is_last_flag_offset = -1;
2890 FLAC__ASSERT(0 != block || append == false);
2892 if(iterator->is_last) {
2894 fixup_is_last_code = 1; /* 1 => clear the is_last flag at the following offset */
2895 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2897 else if(0 == block) {
2898 simple_iterator_push_(iterator);
2899 if(!FLAC__metadata_simple_iterator_prev(iterator)) {
2900 (void)simple_iterator_pop_(iterator);
2903 fixup_is_last_code = -1; /* -1 => set the is_last the flag at the following offset */
2904 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2905 if(!simple_iterator_pop_(iterator))
2910 if(!simple_iterator_copy_file_prefix_(iterator, &tempfile, &tempfilename, append))
2914 if(!write_metadata_block_header_(tempfile, &iterator->status, block)) {
2915 cleanup_tempfile_(&tempfile, &tempfilename);
2919 if(!write_metadata_block_data_(tempfile, &iterator->status, block)) {
2920 cleanup_tempfile_(&tempfile, &tempfilename);
2925 if(!simple_iterator_copy_file_postfix_(iterator, &tempfile, &tempfilename, fixup_is_last_code, fixup_is_last_flag_offset, block==0))
2929 return FLAC__metadata_simple_iterator_next(iterator);
2934 void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator)
2936 FLAC__ASSERT(iterator->depth+1 < SIMPLE_ITERATOR_MAX_PUSH_DEPTH);
2937 iterator->offset[iterator->depth+1] = iterator->offset[iterator->depth];
2941 FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator)
2943 FLAC__ASSERT(iterator->depth > 0);
2945 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2946 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2950 return read_metadata_block_header_(iterator);
2957 * 3: not a FLAC file
2959 unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb)
2961 FLAC__byte buffer[4];
2965 FLAC__ASSERT(FLAC__STREAM_SYNC_LENGTH == sizeof(buffer));
2967 /* skip any id3v2 tag */
2969 n = read_cb(buffer, 1, 4, handle);
2974 else if(0 == memcmp(buffer, "ID3", 3)) {
2975 unsigned tag_length = 0;
2977 /* skip to the tag length */
2978 if(seek_cb(handle, 2, SEEK_CUR) < 0)
2981 /* read the length */
2982 for(i = 0; i < 4; i++) {
2983 if(read_cb(buffer, 1, 1, handle) < 1 || buffer[0] & 0x80)
2986 tag_length |= (buffer[0] & 0x7f);
2989 /* skip the rest of the tag */
2990 if(seek_cb(handle, tag_length, SEEK_CUR) < 0)
2993 /* read the stream sync code */
2995 n = read_cb(buffer, 1, 4, handle);
3002 /* check for the fLaC signature */
3003 if(0 == memcmp(FLAC__STREAM_SYNC_STRING, buffer, FLAC__STREAM_SYNC_LENGTH))
3009 unsigned seek_to_first_metadata_block_(FILE *f)
3011 return seek_to_first_metadata_block_cb_((FLAC__IOHandle)f, (FLAC__IOCallback_Read)fread, fseek_wrapper_);
3014 FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append)
3016 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];
3018 if(0 != fseeko(iterator->file, 0, SEEK_SET)) {
3019 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3022 if(!open_tempfile_(iterator->filename, iterator->tempfile_path_prefix, tempfile, tempfilename, &iterator->status)) {
3023 cleanup_tempfile_(tempfile, tempfilename);
3026 if(!copy_n_bytes_from_file_(iterator->file, *tempfile, offset_end, &iterator->status)) {
3027 cleanup_tempfile_(tempfile, tempfilename);
3034 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)
3036 off_t save_offset = iterator->offset[iterator->depth];
3037 FLAC__ASSERT(0 != *tempfile);
3039 if(0 != fseeko(iterator->file, save_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length, SEEK_SET)) {
3040 cleanup_tempfile_(tempfile, tempfilename);
3041 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3044 if(!copy_remaining_bytes_from_file_(iterator->file, *tempfile, &iterator->status)) {
3045 cleanup_tempfile_(tempfile, tempfilename);
3049 if(fixup_is_last_code != 0) {
3051 * if code == 1, it means a block was appended to the end so
3052 * we have to clear the is_last flag of the previous block
3053 * if code == -1, it means the last block was deleted so
3054 * we have to set the is_last flag of the previous block
3056 /* MAGIC NUMBERs here; we know the is_last flag is the high bit of the byte at this location */
3058 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3059 cleanup_tempfile_(tempfile, tempfilename);
3060 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3063 if(fread(&x, 1, 1, *tempfile) != 1) {
3064 cleanup_tempfile_(tempfile, tempfilename);
3065 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3068 if(fixup_is_last_code > 0) {
3069 FLAC__ASSERT(x & 0x80);
3073 FLAC__ASSERT(!(x & 0x80));
3076 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3077 cleanup_tempfile_(tempfile, tempfilename);
3078 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3081 if(local__fwrite(&x, 1, 1, *tempfile) != 1) {
3082 cleanup_tempfile_(tempfile, tempfilename);
3083 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3088 (void)fclose(iterator->file);
3090 if(!transport_tempfile_(iterator->filename, tempfile, tempfilename, &iterator->status))
3093 if(iterator->has_stats)
3094 set_file_stats_(iterator->filename, &iterator->stats);
3096 if(!simple_iterator_prime_input_(iterator, !iterator->is_writable))
3099 while(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length < save_offset)
3100 if(!FLAC__metadata_simple_iterator_next(iterator))
3105 /* move the iterator to it's original block faster by faking a push, then doing a pop_ */
3106 FLAC__ASSERT(iterator->depth == 0);
3107 iterator->offset[0] = save_offset;
3109 return simple_iterator_pop_(iterator);
3113 FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status)
3115 FLAC__byte buffer[8192];
3118 FLAC__ASSERT(bytes >= 0);
3120 n = flac_min(sizeof(buffer), (size_t)bytes);
3121 if(fread(buffer, 1, n, file) != n) {
3122 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3125 if(local__fwrite(buffer, 1, n, tempfile) != n) {
3126 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3135 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)
3137 FLAC__byte buffer[8192];
3140 FLAC__ASSERT(bytes >= 0);
3142 n = flac_min(sizeof(buffer), (size_t)bytes);
3143 if(read_cb(buffer, 1, n, handle) != n) {
3144 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3147 if(temp_write_cb(buffer, 1, n, temp_handle) != n) {
3148 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3157 FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status)
3159 FLAC__byte buffer[8192];
3162 while(!feof(file)) {
3163 n = fread(buffer, 1, sizeof(buffer), file);
3164 if(n == 0 && !feof(file)) {
3165 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3168 if(n > 0 && local__fwrite(buffer, 1, n, tempfile) != n) {
3169 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3177 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)
3179 FLAC__byte buffer[8192];
3182 while(!eof_cb(handle)) {
3183 n = read_cb(buffer, 1, sizeof(buffer), handle);
3184 if(n == 0 && !eof_cb(handle)) {
3185 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3188 if(n > 0 && temp_write_cb(buffer, 1, n, temp_handle) != n) {
3189 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3197 FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3199 static const char *tempfile_suffix = ".metadata_edit";
3200 if(0 == tempfile_path_prefix) {
3201 if(0 == (*tempfilename = safe_malloc_add_3op_(strlen(filename), /*+*/strlen(tempfile_suffix), /*+*/1))) {
3202 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3205 strcpy(*tempfilename, filename);
3206 strcat(*tempfilename, tempfile_suffix);
3209 const char *p = strrchr(filename, '/');
3215 if(0 == (*tempfilename = safe_malloc_add_4op_(strlen(tempfile_path_prefix), /*+*/strlen(p), /*+*/strlen(tempfile_suffix), /*+*/2))) {
3216 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3219 strcpy(*tempfilename, tempfile_path_prefix);
3220 strcat(*tempfilename, "/");
3221 strcat(*tempfilename, p);
3222 strcat(*tempfilename, tempfile_suffix);
3225 if(0 == (*tempfile = fopen(*tempfilename, "w+b"))) {
3226 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
3233 FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3235 FLAC__ASSERT(0 != filename);
3236 FLAC__ASSERT(0 != tempfile);
3237 FLAC__ASSERT(0 != *tempfile);
3238 FLAC__ASSERT(0 != tempfilename);
3239 FLAC__ASSERT(0 != *tempfilename);
3240 FLAC__ASSERT(0 != status);
3242 (void)fclose(*tempfile);
3245 #if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__ || defined __EMX__
3246 /* on some flavors of windows, rename() will fail if the destination already exists */
3247 if(unlink(filename) < 0) {
3248 cleanup_tempfile_(tempfile, tempfilename);
3249 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR;
3254 /*@@@ to fully support the tempfile_path_prefix we need to update this piece to actually copy across filesystems instead of just rename(): */
3255 if(0 != rename(*tempfilename, filename)) {
3256 cleanup_tempfile_(tempfile, tempfilename);
3257 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR;
3261 cleanup_tempfile_(tempfile, tempfilename);
3266 void cleanup_tempfile_(FILE **tempfile, char **tempfilename)
3268 if(0 != *tempfile) {
3269 (void)fclose(*tempfile);
3273 if(0 != *tempfilename) {
3274 (void)unlink(*tempfilename);
3275 free(*tempfilename);
3280 FLAC__bool get_file_stats_(const char *filename, struct stat *stats)
3282 FLAC__ASSERT(0 != filename);
3283 FLAC__ASSERT(0 != stats);
3284 return (0 == stat(filename, stats));
3287 void set_file_stats_(const char *filename, struct stat *stats)
3289 struct utimbuf srctime;
3291 FLAC__ASSERT(0 != filename);
3292 FLAC__ASSERT(0 != stats);
3294 srctime.actime = stats->st_atime;
3295 srctime.modtime = stats->st_mtime;
3296 (void)chmod(filename, stats->st_mode);
3297 (void)utime(filename, &srctime);
3298 #if !defined _MSC_VER && !defined __BORLANDC__ && !defined __MINGW32__
3299 FLAC_CHECK_RETURN(chown(filename, stats->st_uid, -1));
3300 FLAC_CHECK_RETURN(chown(filename, -1, stats->st_gid));
3304 int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence)
3306 return fseeko((FILE*)handle, (off_t)offset, whence);
3309 FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle)
3311 return ftello((FILE*)handle);
3314 FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status)
3317 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK:
3318 return FLAC__METADATA_CHAIN_STATUS_OK;
3319 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT:
3320 return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT;
3321 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE:
3322 return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
3323 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE:
3324 return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
3325 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE:
3326 return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE;
3327 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA:
3328 return FLAC__METADATA_CHAIN_STATUS_BAD_METADATA;
3329 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR:
3330 return FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
3331 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR:
3332 return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
3333 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR:
3334 return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
3335 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR:
3336 return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR;
3337 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR:
3338 return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR;
3339 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR:
3340 return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
3341 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR:
3343 return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;