1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2001,2002,2003,2004,2005,2006,2007 Josh Coalson
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * - Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * - Neither the name of the Xiph.org Foundation nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 #if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__
42 #if defined __BORLANDC__
43 #include <utime.h> /* for utime() */
45 #include <sys/utime.h> /* for utime() */
47 #include <io.h> /* for chmod() */
48 #include <sys/types.h> /* for off_t */
49 #if _MSC_VER <= 1600 || defined __BORLANDC__ /* @@@ [2G limit] */
54 #include <sys/types.h> /* some flavors of BSD (like OS X) require this to get time_t */
55 #include <utime.h> /* for utime() */
56 #include <unistd.h> /* for chown(), unlink() */
58 #include <sys/stat.h> /* for stat(), maybe chmod() */
60 #include "private/metadata.h"
62 #include "flac/assert.h"
63 #include "flac/stream_decoder.h"
64 #include "share/alloc.h"
66 #ifdef TARGET_MSDOS /* @@@ [2G limit] */
74 #define max(a,b) ((a)>(b)?(a):(b))
78 #define min(a,b) ((a)<(b)?(a):(b))
81 /****************************************************************************
83 * Local function declarations
85 ***************************************************************************/
87 static void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
88 static void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
89 static void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes);
90 static FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes);
91 static FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes);
92 static FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes);
94 static FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator);
95 static FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block);
96 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);
97 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);
98 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block);
99 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);
100 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);
101 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);
102 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);
103 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment *block);
104 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track);
105 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block);
106 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block);
107 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);
109 static FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
110 static FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
111 static FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
112 static FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
113 static FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block);
114 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);
115 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);
116 static FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block);
117 static FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block);
118 static FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block);
119 static FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block);
120 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);
122 static FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block);
123 static FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last);
124 static FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append);
126 static void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator);
127 static FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator);
129 static unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb);
130 static unsigned seek_to_first_metadata_block_(FILE *f);
132 static FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append);
133 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);
135 static FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status);
136 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);
137 static FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status);
138 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);
140 static FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
141 static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
142 static void cleanup_tempfile_(FILE **tempfile, char **tempfilename);
144 static FLAC__bool get_file_stats_(const char *filename, struct stat *stats);
145 static void set_file_stats_(const char *filename, struct stat *stats);
147 static int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence);
148 static FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle);
150 static FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status);
153 #ifdef FLAC__VALGRIND_TESTING
154 static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
156 size_t ret = fwrite(ptr, size, nmemb, stream);
162 #define local__fwrite fwrite
165 /****************************************************************************
167 * Level 0 implementation
169 ***************************************************************************/
171 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
172 static void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
173 static void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
176 FLAC__bool got_error;
177 FLAC__StreamMetadata *object;
178 } level0_client_data;
180 static FLAC__StreamMetadata *get_one_metadata_block_(const char *filename, FLAC__MetadataType type)
182 level0_client_data cd;
183 FLAC__StreamDecoder *decoder;
185 FLAC__ASSERT(0 != filename);
187 cd.got_error = false;
190 decoder = FLAC__stream_decoder_new();
195 FLAC__stream_decoder_set_md5_checking(decoder, false);
196 FLAC__stream_decoder_set_metadata_ignore_all(decoder);
197 FLAC__stream_decoder_set_metadata_respond(decoder, type);
199 if(FLAC__stream_decoder_init_file(decoder, filename, write_callback_, metadata_callback_, error_callback_, &cd) != FLAC__STREAM_DECODER_INIT_STATUS_OK || cd.got_error) {
200 (void)FLAC__stream_decoder_finish(decoder);
201 FLAC__stream_decoder_delete(decoder);
205 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder) || cd.got_error) {
206 (void)FLAC__stream_decoder_finish(decoder);
207 FLAC__stream_decoder_delete(decoder);
209 FLAC__metadata_object_delete(cd.object);
213 (void)FLAC__stream_decoder_finish(decoder);
214 FLAC__stream_decoder_delete(decoder);
219 FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo)
221 FLAC__StreamMetadata *object;
223 FLAC__ASSERT(0 != filename);
224 FLAC__ASSERT(0 != streaminfo);
226 object = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_STREAMINFO);
229 /* can just copy the contents since STREAMINFO has no internal structure */
230 *streaminfo = *object;
231 FLAC__metadata_object_delete(object);
239 FLAC_API FLAC__bool FLAC__metadata_get_tags(const char *filename, FLAC__StreamMetadata **tags)
241 FLAC__ASSERT(0 != filename);
242 FLAC__ASSERT(0 != tags);
244 *tags = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_VORBIS_COMMENT);
249 FLAC_API FLAC__bool FLAC__metadata_get_cuesheet(const char *filename, FLAC__StreamMetadata **cuesheet)
251 FLAC__ASSERT(0 != filename);
252 FLAC__ASSERT(0 != cuesheet);
254 *cuesheet = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_CUESHEET);
256 return 0 != *cuesheet;
259 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
261 (void)decoder, (void)frame, (void)buffer, (void)client_data;
263 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
266 void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
268 level0_client_data *cd = (level0_client_data *)client_data;
272 * we assume we only get here when the one metadata block we were
273 * looking for was passed to us
275 if(!cd->got_error && 0 == cd->object) {
276 if(0 == (cd->object = FLAC__metadata_object_clone(metadata)))
277 cd->got_error = true;
281 void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
283 level0_client_data *cd = (level0_client_data *)client_data;
286 if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
287 cd->got_error = true;
290 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)
292 FLAC__Metadata_SimpleIterator *it;
293 FLAC__uint64 max_area_seen = 0;
294 FLAC__uint64 max_depth_seen = 0;
296 FLAC__ASSERT(0 != filename);
297 FLAC__ASSERT(0 != picture);
301 it = FLAC__metadata_simple_iterator_new();
304 if(!FLAC__metadata_simple_iterator_init(it, filename, /*read_only=*/true, /*preserve_file_stats=*/true)) {
305 FLAC__metadata_simple_iterator_delete(it);
309 if(FLAC__metadata_simple_iterator_get_block_type(it) == FLAC__METADATA_TYPE_PICTURE) {
310 FLAC__StreamMetadata *obj = FLAC__metadata_simple_iterator_get_block(it);
311 FLAC__uint64 area = (FLAC__uint64)obj->data.picture.width * (FLAC__uint64)obj->data.picture.height;
312 /* check constraints */
314 (type == (FLAC__StreamMetadata_Picture_Type)(-1) || type == obj->data.picture.type) &&
315 (mime_type == 0 || !strcmp(mime_type, obj->data.picture.mime_type)) &&
316 (description == 0 || !strcmp((const char *)description, (const char *)obj->data.picture.description)) &&
317 obj->data.picture.width <= max_width &&
318 obj->data.picture.height <= max_height &&
319 obj->data.picture.depth <= max_depth &&
320 obj->data.picture.colors <= max_colors &&
321 (area > max_area_seen || (area == max_area_seen && obj->data.picture.depth > max_depth_seen))
324 FLAC__metadata_object_delete(*picture);
326 max_area_seen = area;
327 max_depth_seen = obj->data.picture.depth;
330 FLAC__metadata_object_delete(obj);
333 } while(FLAC__metadata_simple_iterator_next(it));
335 FLAC__metadata_simple_iterator_delete(it);
337 return (0 != *picture);
341 /****************************************************************************
343 * Level 1 implementation
345 ***************************************************************************/
347 #define SIMPLE_ITERATOR_MAX_PUSH_DEPTH (1+4)
348 /* 1 for initial offset, +4 for our own personal use */
350 struct FLAC__Metadata_SimpleIterator {
352 char *filename, *tempfile_path_prefix;
354 FLAC__bool has_stats;
355 FLAC__bool is_writable;
356 FLAC__Metadata_SimpleIteratorStatus status;
357 off_t offset[SIMPLE_ITERATOR_MAX_PUSH_DEPTH];
358 off_t first_offset; /* this is the offset to the STREAMINFO block */
360 /* this is the metadata block header of the current block we are pointing to: */
362 FLAC__MetadataType type;
366 FLAC_API const char * const FLAC__Metadata_SimpleIteratorStatusString[] = {
367 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK",
368 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT",
369 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE",
370 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE",
371 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE",
372 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA",
373 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR",
374 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR",
375 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR",
376 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR",
377 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR",
378 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR",
379 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR"
383 FLAC_API FLAC__Metadata_SimpleIterator *FLAC__metadata_simple_iterator_new(void)
385 FLAC__Metadata_SimpleIterator *iterator = (FLAC__Metadata_SimpleIterator*)calloc(1, sizeof(FLAC__Metadata_SimpleIterator));
389 iterator->filename = 0;
390 iterator->tempfile_path_prefix = 0;
391 iterator->has_stats = false;
392 iterator->is_writable = false;
393 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
394 iterator->first_offset = iterator->offset[0] = -1;
401 static void simple_iterator_free_guts_(FLAC__Metadata_SimpleIterator *iterator)
403 FLAC__ASSERT(0 != iterator);
405 if(0 != iterator->file) {
406 fclose(iterator->file);
408 if(iterator->has_stats)
409 set_file_stats_(iterator->filename, &iterator->stats);
411 if(0 != iterator->filename) {
412 free(iterator->filename);
413 iterator->filename = 0;
415 if(0 != iterator->tempfile_path_prefix) {
416 free(iterator->tempfile_path_prefix);
417 iterator->tempfile_path_prefix = 0;
421 FLAC_API void FLAC__metadata_simple_iterator_delete(FLAC__Metadata_SimpleIterator *iterator)
423 FLAC__ASSERT(0 != iterator);
425 simple_iterator_free_guts_(iterator);
429 FLAC_API FLAC__Metadata_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__Metadata_SimpleIterator *iterator)
431 FLAC__Metadata_SimpleIteratorStatus status;
433 FLAC__ASSERT(0 != iterator);
435 status = iterator->status;
436 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
440 static FLAC__bool simple_iterator_prime_input_(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool read_only)
444 FLAC__ASSERT(0 != iterator);
446 if(read_only || 0 == (iterator->file = fopen(iterator->filename, "r+b"))) {
447 iterator->is_writable = false;
448 if(read_only || errno == EACCES) {
449 if(0 == (iterator->file = fopen(iterator->filename, "rb"))) {
450 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
455 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
460 iterator->is_writable = true;
463 ret = seek_to_first_metadata_block_(iterator->file);
467 iterator->first_offset = iterator->offset[iterator->depth] = ftello(iterator->file);
468 return read_metadata_block_header_(iterator);
470 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
473 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
476 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE;
485 @@@ If we decide to finish implementing this, put this comment back in metadata.h
487 * The 'tempfile_path_prefix' allows you to specify a directory where
488 * tempfiles should go. Remember that if your metadata edits cause the
489 * FLAC file to grow, the entire file will have to be rewritten. If
490 * 'tempfile_path_prefix' is NULL, the temp file will be written in the
491 * same directory as the original FLAC file. This makes replacing the
492 * original with the tempfile fast but requires extra space in the same
493 * partition for the tempfile. If space is a problem, you can pass a
494 * directory name belonging to a different partition in
495 * 'tempfile_path_prefix'. Note that you should use the forward slash
496 * '/' as the directory separator. A trailing slash is not needed; it
497 * will be added automatically.
499 FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats, const char *tempfile_path_prefix);
502 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)
504 const char *tempfile_path_prefix = 0; /*@@@ search for comments near 'rename(...)' for what it will take to finish implementing this */
506 FLAC__ASSERT(0 != iterator);
507 FLAC__ASSERT(0 != filename);
509 simple_iterator_free_guts_(iterator);
511 if(!read_only && preserve_file_stats)
512 iterator->has_stats = get_file_stats_(filename, &iterator->stats);
514 if(0 == (iterator->filename = strdup(filename))) {
515 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
518 if(0 != tempfile_path_prefix && 0 == (iterator->tempfile_path_prefix = strdup(tempfile_path_prefix))) {
519 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
523 return simple_iterator_prime_input_(iterator, read_only);
526 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__Metadata_SimpleIterator *iterator)
528 FLAC__ASSERT(0 != iterator);
529 FLAC__ASSERT(0 != iterator->file);
531 return iterator->is_writable;
534 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__Metadata_SimpleIterator *iterator)
536 FLAC__ASSERT(0 != iterator);
537 FLAC__ASSERT(0 != iterator->file);
539 if(iterator->is_last)
542 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
543 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
547 iterator->offset[iterator->depth] = ftello(iterator->file);
549 return read_metadata_block_header_(iterator);
552 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__Metadata_SimpleIterator *iterator)
556 FLAC__ASSERT(0 != iterator);
557 FLAC__ASSERT(0 != iterator->file);
559 if(iterator->offset[iterator->depth] == iterator->first_offset)
562 if(0 != fseeko(iterator->file, iterator->first_offset, SEEK_SET)) {
563 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
566 this_offset = iterator->first_offset;
567 if(!read_metadata_block_header_(iterator))
570 /* we ignore any error from ftello() and catch it in fseeko() */
571 while(ftello(iterator->file) + (off_t)iterator->length < iterator->offset[iterator->depth]) {
572 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
573 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
576 this_offset = ftello(iterator->file);
577 if(!read_metadata_block_header_(iterator))
581 iterator->offset[iterator->depth] = this_offset;
587 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_last(const FLAC__Metadata_SimpleIterator *iterator)
589 FLAC__ASSERT(0 != iterator);
590 FLAC__ASSERT(0 != iterator->file);
592 return iterator->is_last;
596 FLAC_API off_t FLAC__metadata_simple_iterator_get_block_offset(const FLAC__Metadata_SimpleIterator *iterator)
598 FLAC__ASSERT(0 != iterator);
599 FLAC__ASSERT(0 != iterator->file);
601 return iterator->offset[iterator->depth];
604 FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator)
606 FLAC__ASSERT(0 != iterator);
607 FLAC__ASSERT(0 != iterator->file);
609 return iterator->type;
613 FLAC_API unsigned FLAC__metadata_simple_iterator_get_block_length(const FLAC__Metadata_SimpleIterator *iterator)
615 FLAC__ASSERT(0 != iterator);
616 FLAC__ASSERT(0 != iterator->file);
618 return iterator->length;
622 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_get_application_id(FLAC__Metadata_SimpleIterator *iterator, FLAC__byte *id)
624 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
626 FLAC__ASSERT(0 != iterator);
627 FLAC__ASSERT(0 != iterator->file);
628 FLAC__ASSERT(0 != id);
630 if(iterator->type != FLAC__METADATA_TYPE_APPLICATION) {
631 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
635 if(fread(id, 1, id_bytes, iterator->file) != id_bytes) {
636 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
641 if(0 != fseeko(iterator->file, -((int)id_bytes), SEEK_CUR)) {
642 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
649 FLAC_API FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator)
651 FLAC__StreamMetadata *block = FLAC__metadata_object_new(iterator->type);
653 FLAC__ASSERT(0 != iterator);
654 FLAC__ASSERT(0 != iterator->file);
657 block->is_last = iterator->is_last;
658 block->length = iterator->length;
660 if(!read_metadata_block_data_(iterator, block)) {
661 FLAC__metadata_object_delete(block);
665 /* back up to the beginning of the block data to stay consistent */
666 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH, SEEK_SET)) {
667 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
668 FLAC__metadata_object_delete(block);
673 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
678 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
680 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth];)
683 FLAC__ASSERT(0 != iterator);
684 FLAC__ASSERT(0 != iterator->file);
685 FLAC__ASSERT(0 != block);
687 if(!iterator->is_writable) {
688 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
692 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO || block->type == FLAC__METADATA_TYPE_STREAMINFO) {
693 if(iterator->type != block->type) {
694 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
699 block->is_last = iterator->is_last;
701 if(iterator->length == block->length)
702 return write_metadata_block_stationary_(iterator, block);
703 else if(iterator->length > block->length) {
704 if(use_padding && iterator->length >= FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) {
705 ret = write_metadata_block_stationary_with_padding_(iterator, block, iterator->length - FLAC__STREAM_METADATA_HEADER_LENGTH - block->length, block->is_last);
706 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
707 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
711 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
712 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
713 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
717 else /* iterator->length < block->length */ {
718 unsigned padding_leftover = 0;
719 FLAC__bool padding_is_last = false;
721 /* first see if we can even use padding */
722 if(iterator->is_last) {
726 const unsigned extra_padding_bytes_required = block->length - iterator->length;
727 simple_iterator_push_(iterator);
728 if(!FLAC__metadata_simple_iterator_next(iterator)) {
729 (void)simple_iterator_pop_(iterator);
732 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
736 if(FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length == extra_padding_bytes_required) {
737 padding_leftover = 0;
738 block->is_last = iterator->is_last;
740 else if(iterator->length < extra_padding_bytes_required)
743 padding_leftover = FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length - extra_padding_bytes_required;
744 padding_is_last = iterator->is_last;
745 block->is_last = false;
748 if(!simple_iterator_pop_(iterator))
753 if(padding_leftover == 0) {
754 ret = write_metadata_block_stationary_(iterator, block);
755 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
756 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
760 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
761 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
762 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
763 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
768 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
769 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
770 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
776 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
778 unsigned padding_leftover = 0;
779 FLAC__bool padding_is_last = false;
781 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length;)
784 FLAC__ASSERT(0 != iterator);
785 FLAC__ASSERT(0 != iterator->file);
786 FLAC__ASSERT(0 != block);
788 if(!iterator->is_writable)
791 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
792 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
796 block->is_last = iterator->is_last;
799 /* first see if we can even use padding */
800 if(iterator->is_last) {
804 simple_iterator_push_(iterator);
805 if(!FLAC__metadata_simple_iterator_next(iterator)) {
806 (void)simple_iterator_pop_(iterator);
809 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
813 if(iterator->length == block->length) {
814 padding_leftover = 0;
815 block->is_last = iterator->is_last;
817 else if(iterator->length < FLAC__STREAM_METADATA_HEADER_LENGTH + block->length)
820 padding_leftover = iterator->length - block->length;
821 padding_is_last = iterator->is_last;
822 block->is_last = false;
825 if(!simple_iterator_pop_(iterator))
830 /* move to the next block, which is suitable padding */
831 if(!FLAC__metadata_simple_iterator_next(iterator))
833 if(padding_leftover == 0) {
834 ret = write_metadata_block_stationary_(iterator, block);
835 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
836 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
840 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
841 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
842 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
843 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
848 ret = rewrite_whole_file_(iterator, block, /*append=*/true);
849 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
850 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
855 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool use_padding)
857 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth];)
860 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO) {
861 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
866 FLAC__StreamMetadata *padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
868 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
871 padding->length = iterator->length;
872 if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false)) {
873 FLAC__metadata_object_delete(padding);
876 FLAC__metadata_object_delete(padding);
877 if(!FLAC__metadata_simple_iterator_prev(iterator))
879 FLAC__ASSERT(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length == debug_target_offset);
880 FLAC__ASSERT(ftello(iterator->file) + (off_t)iterator->length == debug_target_offset);
884 ret = rewrite_whole_file_(iterator, 0, /*append=*/false);
885 FLAC__ASSERT(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length == debug_target_offset);
886 FLAC__ASSERT(ftello(iterator->file) + (off_t)iterator->length == debug_target_offset);
893 /****************************************************************************
895 * Level 2 implementation
897 ***************************************************************************/
900 typedef struct FLAC__Metadata_Node {
901 FLAC__StreamMetadata *data;
902 struct FLAC__Metadata_Node *prev, *next;
903 } FLAC__Metadata_Node;
905 struct FLAC__Metadata_Chain {
906 char *filename; /* will be NULL if using callbacks */
908 FLAC__Metadata_Node *head;
909 FLAC__Metadata_Node *tail;
911 FLAC__Metadata_ChainStatus status;
912 off_t first_offset, last_offset;
914 * This is the length of the chain initially read from the FLAC file.
915 * it is used to compare against the current length to decide whether
916 * or not the whole file has to be rewritten.
918 off_t initial_length;
919 /* @@@ hacky, these are currently only needed by ogg reader */
920 FLAC__IOHandle handle;
921 FLAC__IOCallback_Read read_cb;
924 struct FLAC__Metadata_Iterator {
925 FLAC__Metadata_Chain *chain;
926 FLAC__Metadata_Node *current;
929 FLAC_API const char * const FLAC__Metadata_ChainStatusString[] = {
930 "FLAC__METADATA_CHAIN_STATUS_OK",
931 "FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT",
932 "FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE",
933 "FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE",
934 "FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE",
935 "FLAC__METADATA_CHAIN_STATUS_BAD_METADATA",
936 "FLAC__METADATA_CHAIN_STATUS_READ_ERROR",
937 "FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR",
938 "FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR",
939 "FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR",
940 "FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR",
941 "FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR",
942 "FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR",
943 "FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS",
944 "FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH",
945 "FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL"
949 static FLAC__Metadata_Node *node_new_(void)
951 return (FLAC__Metadata_Node*)calloc(1, sizeof(FLAC__Metadata_Node));
954 static void node_delete_(FLAC__Metadata_Node *node)
956 FLAC__ASSERT(0 != node);
958 FLAC__metadata_object_delete(node->data);
962 static void chain_init_(FLAC__Metadata_Chain *chain)
964 FLAC__ASSERT(0 != chain);
967 chain->is_ogg = false;
968 chain->head = chain->tail = 0;
970 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
971 chain->initial_length = 0;
975 static void chain_clear_(FLAC__Metadata_Chain *chain)
977 FLAC__Metadata_Node *node, *next;
979 FLAC__ASSERT(0 != chain);
981 for(node = chain->head; node; ) {
987 if(0 != chain->filename)
988 free(chain->filename);
993 static void chain_append_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
995 FLAC__ASSERT(0 != chain);
996 FLAC__ASSERT(0 != node);
997 FLAC__ASSERT(0 != node->data);
999 node->next = node->prev = 0;
1000 node->data->is_last = true;
1001 if(0 != chain->tail)
1002 chain->tail->data->is_last = false;
1004 if(0 == chain->head)
1007 FLAC__ASSERT(0 != chain->tail);
1008 chain->tail->next = node;
1009 node->prev = chain->tail;
1015 static void chain_remove_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1017 FLAC__ASSERT(0 != chain);
1018 FLAC__ASSERT(0 != node);
1020 if(node == chain->head)
1021 chain->head = node->next;
1023 node->prev->next = node->next;
1025 if(node == chain->tail)
1026 chain->tail = node->prev;
1028 node->next->prev = node->prev;
1030 if(0 != chain->tail)
1031 chain->tail->data->is_last = true;
1036 static void chain_delete_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1038 chain_remove_node_(chain, node);
1042 static off_t chain_calculate_length_(FLAC__Metadata_Chain *chain)
1044 const FLAC__Metadata_Node *node;
1046 for(node = chain->head; node; node = node->next)
1047 length += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1051 static void iterator_insert_node_(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 node->data->is_last = false;
1063 node->prev = iterator->current->prev;
1064 node->next = iterator->current;
1067 iterator->chain->head = node;
1069 node->prev->next = node;
1071 iterator->current->prev = node;
1073 iterator->chain->nodes++;
1076 static void iterator_insert_node_after_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1078 FLAC__ASSERT(0 != node);
1079 FLAC__ASSERT(0 != node->data);
1080 FLAC__ASSERT(0 != iterator);
1081 FLAC__ASSERT(0 != iterator->current);
1082 FLAC__ASSERT(0 != iterator->chain);
1083 FLAC__ASSERT(0 != iterator->chain->head);
1084 FLAC__ASSERT(0 != iterator->chain->tail);
1086 iterator->current->data->is_last = false;
1088 node->prev = iterator->current;
1089 node->next = iterator->current->next;
1092 iterator->chain->tail = node;
1094 node->next->prev = node;
1096 node->prev->next = node;
1098 iterator->chain->tail->data->is_last = true;
1100 iterator->chain->nodes++;
1103 /* return true iff node and node->next are both padding */
1104 static FLAC__bool chain_merge_adjacent_padding_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1106 if(node->data->type == FLAC__METADATA_TYPE_PADDING && 0 != node->next && node->next->data->type == FLAC__METADATA_TYPE_PADDING) {
1107 const unsigned growth = FLAC__STREAM_METADATA_HEADER_LENGTH + node->next->data->length;
1108 node->data->length += growth;
1110 chain_delete_node_(chain, node->next);
1117 /* Returns the new length of the chain, or 0 if there was an error. */
1118 /* WATCHOUT: This can get called multiple times before a write, so
1119 * it should still work when this happens.
1121 /* WATCHOUT: Make sure to also update the logic in
1122 * FLAC__metadata_chain_check_if_tempfile_needed() if the logic here changes.
1124 static off_t chain_prepare_for_write_(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1126 off_t current_length = chain_calculate_length_(chain);
1129 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1130 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1131 const off_t delta = chain->initial_length - current_length;
1132 chain->tail->data->length += delta;
1133 current_length += delta;
1134 FLAC__ASSERT(current_length == chain->initial_length);
1136 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1137 else if(current_length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) {
1138 FLAC__StreamMetadata *padding;
1139 FLAC__Metadata_Node *node;
1140 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) {
1141 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1144 padding->length = chain->initial_length - (FLAC__STREAM_METADATA_HEADER_LENGTH + current_length);
1145 if(0 == (node = node_new_())) {
1146 FLAC__metadata_object_delete(padding);
1147 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1150 node->data = padding;
1151 chain_append_node_(chain, node);
1152 current_length = chain_calculate_length_(chain);
1153 FLAC__ASSERT(current_length == chain->initial_length);
1155 /* 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 */
1156 else if(current_length > chain->initial_length) {
1157 const off_t delta = current_length - chain->initial_length;
1158 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1159 /* if the delta is exactly the size of the last padding block, remove the padding block */
1160 if((off_t)chain->tail->data->length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta) {
1161 chain_delete_node_(chain, chain->tail);
1162 current_length = chain_calculate_length_(chain);
1163 FLAC__ASSERT(current_length == chain->initial_length);
1165 /* if there is at least 'delta' bytes of padding, trim the padding down */
1166 else if((off_t)chain->tail->data->length >= delta) {
1167 chain->tail->data->length -= delta;
1168 current_length -= delta;
1169 FLAC__ASSERT(current_length == chain->initial_length);
1175 return current_length;
1178 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)
1180 FLAC__Metadata_Node *node;
1182 FLAC__ASSERT(0 != chain);
1184 /* we assume we're already at the beginning of the file */
1186 switch(seek_to_first_metadata_block_cb_(handle, read_cb, seek_cb)) {
1190 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1193 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1196 chain->status = FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
1204 FLAC__int64 pos = tell_cb(handle);
1206 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1209 chain->first_offset = (off_t)pos;
1214 FLAC__MetadataType type;
1220 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1224 if(!read_metadata_block_header_cb_(handle, read_cb, &is_last, &type, &length)) {
1225 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1229 node->data = FLAC__metadata_object_new(type);
1230 if(0 == node->data) {
1232 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1236 node->data->is_last = is_last;
1237 node->data->length = length;
1239 chain->status = get_equivalent_status_(read_metadata_block_data_cb_(handle, read_cb, seek_cb, node->data));
1240 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1244 chain_append_node_(chain, node);
1249 FLAC__int64 pos = tell_cb(handle);
1251 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1254 chain->last_offset = (off_t)pos;
1257 chain->initial_length = chain_calculate_length_(chain);
1262 static FLAC__StreamDecoderReadStatus chain_read_ogg_read_cb_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
1264 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1266 if(*bytes > 0 && chain->status == FLAC__METADATA_CHAIN_STATUS_OK) {
1267 *bytes = chain->read_cb(buffer, sizeof(FLAC__byte), *bytes, chain->handle);
1269 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
1271 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
1274 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
1277 static FLAC__StreamDecoderWriteStatus chain_read_ogg_write_cb_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
1279 (void)decoder, (void)frame, (void)buffer, (void)client_data;
1280 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1283 static void chain_read_ogg_metadata_cb_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
1285 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1286 FLAC__Metadata_Node *node;
1292 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1296 node->data = FLAC__metadata_object_clone(metadata);
1297 if(0 == node->data) {
1299 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1303 chain_append_node_(chain, node);
1306 static void chain_read_ogg_error_cb_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1308 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1309 (void)decoder, (void)status;
1310 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1313 static FLAC__bool chain_read_ogg_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb)
1315 FLAC__StreamDecoder *decoder;
1317 FLAC__ASSERT(0 != chain);
1319 /* we assume we're already at the beginning of the file */
1321 chain->handle = handle;
1322 chain->read_cb = read_cb;
1323 if(0 == (decoder = FLAC__stream_decoder_new())) {
1324 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1327 FLAC__stream_decoder_set_metadata_respond_all(decoder);
1328 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) {
1329 FLAC__stream_decoder_delete(decoder);
1330 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1334 chain->first_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1336 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder))
1337 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1338 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1339 FLAC__stream_decoder_delete(decoder);
1343 FLAC__stream_decoder_delete(decoder);
1345 chain->last_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1347 chain->initial_length = chain_calculate_length_(chain);
1352 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)
1354 FLAC__Metadata_Node *node;
1356 FLAC__ASSERT(0 != chain);
1357 FLAC__ASSERT(0 != chain->head);
1359 if(0 != seek_cb(handle, chain->first_offset, SEEK_SET)) {
1360 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1364 for(node = chain->head; node; node = node->next) {
1365 if(!write_metadata_block_header_cb_(handle, write_cb, node->data)) {
1366 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1369 if(!write_metadata_block_data_cb_(handle, write_cb, node->data)) {
1370 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1375 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1377 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1381 static FLAC__bool chain_rewrite_metadata_in_place_(FLAC__Metadata_Chain *chain)
1386 FLAC__ASSERT(0 != chain->filename);
1388 if(0 == (file = fopen(chain->filename, "r+b"))) {
1389 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1393 /* chain_rewrite_metadata_in_place_cb_() sets chain->status for us */
1394 ret = chain_rewrite_metadata_in_place_cb_(chain, (FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, fseek_wrapper_);
1401 static FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix)
1405 FLAC__Metadata_SimpleIteratorStatus status;
1406 const FLAC__Metadata_Node *node;
1408 FLAC__ASSERT(0 != chain);
1409 FLAC__ASSERT(0 != chain->filename);
1410 FLAC__ASSERT(0 != chain->head);
1412 /* copy the file prefix (data up to first metadata block */
1413 if(0 == (f = fopen(chain->filename, "rb"))) {
1414 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1417 if(!open_tempfile_(chain->filename, tempfile_path_prefix, &tempfile, &tempfilename, &status)) {
1418 chain->status = get_equivalent_status_(status);
1419 cleanup_tempfile_(&tempfile, &tempfilename);
1422 if(!copy_n_bytes_from_file_(f, tempfile, chain->first_offset, &status)) {
1423 chain->status = get_equivalent_status_(status);
1424 cleanup_tempfile_(&tempfile, &tempfilename);
1428 /* write the metadata */
1429 for(node = chain->head; node; node = node->next) {
1430 if(!write_metadata_block_header_(tempfile, &status, node->data)) {
1431 chain->status = get_equivalent_status_(status);
1434 if(!write_metadata_block_data_(tempfile, &status, node->data)) {
1435 chain->status = get_equivalent_status_(status);
1439 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1441 /* copy the file postfix (everything after the metadata) */
1442 if(0 != fseeko(f, chain->last_offset, SEEK_SET)) {
1443 cleanup_tempfile_(&tempfile, &tempfilename);
1444 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1447 if(!copy_remaining_bytes_from_file_(f, tempfile, &status)) {
1448 cleanup_tempfile_(&tempfile, &tempfilename);
1449 chain->status = get_equivalent_status_(status);
1453 /* move the tempfile on top of the original */
1455 if(!transport_tempfile_(chain->filename, &tempfile, &tempfilename, &status))
1461 /* assumes 'handle' is already at beginning of file */
1462 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)
1464 FLAC__Metadata_SimpleIteratorStatus status;
1465 const FLAC__Metadata_Node *node;
1467 FLAC__ASSERT(0 != chain);
1468 FLAC__ASSERT(0 == chain->filename);
1469 FLAC__ASSERT(0 != chain->head);
1471 /* copy the file prefix (data up to first metadata block */
1472 if(!copy_n_bytes_from_file_cb_(handle, read_cb, temp_handle, temp_write_cb, chain->first_offset, &status)) {
1473 chain->status = get_equivalent_status_(status);
1477 /* write the metadata */
1478 for(node = chain->head; node; node = node->next) {
1479 if(!write_metadata_block_header_cb_(temp_handle, temp_write_cb, node->data)) {
1480 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1483 if(!write_metadata_block_data_cb_(temp_handle, temp_write_cb, node->data)) {
1484 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1488 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1490 /* copy the file postfix (everything after the metadata) */
1491 if(0 != seek_cb(handle, chain->last_offset, SEEK_SET)) {
1492 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1495 if(!copy_remaining_bytes_from_file_cb_(handle, read_cb, eof_cb, temp_handle, temp_write_cb, &status)) {
1496 chain->status = get_equivalent_status_(status);
1503 FLAC_API FLAC__Metadata_Chain *FLAC__metadata_chain_new(void)
1505 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)calloc(1, sizeof(FLAC__Metadata_Chain));
1513 FLAC_API void FLAC__metadata_chain_delete(FLAC__Metadata_Chain *chain)
1515 FLAC__ASSERT(0 != chain);
1517 chain_clear_(chain);
1522 FLAC_API FLAC__Metadata_ChainStatus FLAC__metadata_chain_status(FLAC__Metadata_Chain *chain)
1524 FLAC__Metadata_ChainStatus status;
1526 FLAC__ASSERT(0 != chain);
1528 status = chain->status;
1529 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1533 static FLAC__bool chain_read_(FLAC__Metadata_Chain *chain, const char *filename, FLAC__bool is_ogg)
1538 FLAC__ASSERT(0 != chain);
1539 FLAC__ASSERT(0 != filename);
1541 chain_clear_(chain);
1543 if(0 == (chain->filename = strdup(filename))) {
1544 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1548 chain->is_ogg = is_ogg;
1550 if(0 == (file = fopen(filename, "rb"))) {
1551 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1555 /* the function also sets chain->status for us */
1557 chain_read_ogg_cb_(chain, file, (FLAC__IOCallback_Read)fread) :
1558 chain_read_cb_(chain, file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, ftell_wrapper_)
1566 FLAC_API FLAC__bool FLAC__metadata_chain_read(FLAC__Metadata_Chain *chain, const char *filename)
1568 return chain_read_(chain, filename, /*is_ogg=*/false);
1571 /*@@@@add to tests*/
1572 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg(FLAC__Metadata_Chain *chain, const char *filename)
1574 return chain_read_(chain, filename, /*is_ogg=*/true);
1577 static FLAC__bool chain_read_with_callbacks_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks, FLAC__bool is_ogg)
1581 FLAC__ASSERT(0 != chain);
1583 chain_clear_(chain);
1585 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.tell) {
1586 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1590 chain->is_ogg = is_ogg;
1593 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1594 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1598 /* the function also sets chain->status for us */
1600 chain_read_ogg_cb_(chain, handle, callbacks.read) :
1601 chain_read_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.tell)
1607 FLAC_API FLAC__bool FLAC__metadata_chain_read_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1609 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/false);
1612 /*@@@@add to tests*/
1613 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1615 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/true);
1618 FLAC_API FLAC__bool FLAC__metadata_chain_check_if_tempfile_needed(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1620 /* This does all the same checks that are in chain_prepare_for_write_()
1621 * but doesn't actually alter the chain. Make sure to update the logic
1622 * here if chain_prepare_for_write_() changes.
1624 const off_t current_length = chain_calculate_length_(chain);
1626 FLAC__ASSERT(0 != chain);
1629 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1630 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING)
1632 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1633 else if(current_length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length)
1635 /* 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 */
1636 else if(current_length > chain->initial_length) {
1637 const off_t delta = current_length - chain->initial_length;
1638 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1639 /* if the delta is exactly the size of the last padding block, remove the padding block */
1640 if((off_t)chain->tail->data->length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta)
1642 /* if there is at least 'delta' bytes of padding, trim the padding down */
1643 else if((off_t)chain->tail->data->length >= delta)
1649 return (current_length != chain->initial_length);
1652 FLAC_API FLAC__bool FLAC__metadata_chain_write(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats)
1655 const char *tempfile_path_prefix = 0;
1656 off_t current_length;
1658 FLAC__ASSERT(0 != chain);
1660 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1661 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1665 if (0 == chain->filename) {
1666 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1670 current_length = chain_prepare_for_write_(chain, use_padding);
1672 /* a return value of 0 means there was an error; chain->status is already set */
1673 if (0 == current_length)
1676 if(preserve_file_stats)
1677 get_file_stats_(chain->filename, &stats);
1679 if(current_length == chain->initial_length) {
1680 if(!chain_rewrite_metadata_in_place_(chain))
1684 if(!chain_rewrite_file_(chain, tempfile_path_prefix))
1687 /* recompute lengths and offsets */
1689 const FLAC__Metadata_Node *node;
1690 chain->initial_length = current_length;
1691 chain->last_offset = chain->first_offset;
1692 for(node = chain->head; node; node = node->next)
1693 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1697 if(preserve_file_stats)
1698 set_file_stats_(chain->filename, &stats);
1703 FLAC_API FLAC__bool FLAC__metadata_chain_write_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1705 off_t current_length;
1707 FLAC__ASSERT(0 != chain);
1709 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1710 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1714 if (0 != chain->filename) {
1715 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1719 if (0 == callbacks.write || 0 == callbacks.seek) {
1720 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1724 if (FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1725 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1729 current_length = chain_prepare_for_write_(chain, use_padding);
1731 /* a return value of 0 means there was an error; chain->status is already set */
1732 if (0 == current_length)
1735 FLAC__ASSERT(current_length == chain->initial_length);
1737 return chain_rewrite_metadata_in_place_cb_(chain, handle, callbacks.write, callbacks.seek);
1740 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)
1742 off_t current_length;
1744 FLAC__ASSERT(0 != chain);
1746 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1747 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1751 if (0 != chain->filename) {
1752 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1756 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.eof) {
1757 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1760 if (0 == temp_callbacks.write) {
1761 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1765 if (!FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1766 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1770 current_length = chain_prepare_for_write_(chain, use_padding);
1772 /* a return value of 0 means there was an error; chain->status is already set */
1773 if (0 == current_length)
1776 FLAC__ASSERT(current_length != chain->initial_length);
1779 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1780 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1784 if(!chain_rewrite_file_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.eof, temp_handle, temp_callbacks.write))
1787 /* recompute lengths and offsets */
1789 const FLAC__Metadata_Node *node;
1790 chain->initial_length = current_length;
1791 chain->last_offset = chain->first_offset;
1792 for(node = chain->head; node; node = node->next)
1793 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1799 FLAC_API void FLAC__metadata_chain_merge_padding(FLAC__Metadata_Chain *chain)
1801 FLAC__Metadata_Node *node;
1803 FLAC__ASSERT(0 != chain);
1805 for(node = chain->head; node; ) {
1806 if(!chain_merge_adjacent_padding_(chain, node))
1811 FLAC_API void FLAC__metadata_chain_sort_padding(FLAC__Metadata_Chain *chain)
1813 FLAC__Metadata_Node *node, *save;
1816 FLAC__ASSERT(0 != chain);
1819 * Don't try and be too smart... this simple algo is good enough for
1820 * the small number of nodes that we deal with.
1822 for(i = 0, node = chain->head; i < chain->nodes; i++) {
1823 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1825 chain_remove_node_(chain, node);
1826 chain_append_node_(chain, node);
1834 FLAC__metadata_chain_merge_padding(chain);
1838 FLAC_API FLAC__Metadata_Iterator *FLAC__metadata_iterator_new(void)
1840 FLAC__Metadata_Iterator *iterator = (FLAC__Metadata_Iterator*)calloc(1, sizeof(FLAC__Metadata_Iterator));
1842 /* calloc() implies:
1843 iterator->current = 0;
1844 iterator->chain = 0;
1850 FLAC_API void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator)
1852 FLAC__ASSERT(0 != iterator);
1857 FLAC_API void FLAC__metadata_iterator_init(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Chain *chain)
1859 FLAC__ASSERT(0 != iterator);
1860 FLAC__ASSERT(0 != chain);
1861 FLAC__ASSERT(0 != chain->head);
1863 iterator->chain = chain;
1864 iterator->current = chain->head;
1867 FLAC_API FLAC__bool FLAC__metadata_iterator_next(FLAC__Metadata_Iterator *iterator)
1869 FLAC__ASSERT(0 != iterator);
1871 if(0 == iterator->current || 0 == iterator->current->next)
1874 iterator->current = iterator->current->next;
1878 FLAC_API FLAC__bool FLAC__metadata_iterator_prev(FLAC__Metadata_Iterator *iterator)
1880 FLAC__ASSERT(0 != iterator);
1882 if(0 == iterator->current || 0 == iterator->current->prev)
1885 iterator->current = iterator->current->prev;
1889 FLAC_API FLAC__MetadataType FLAC__metadata_iterator_get_block_type(const FLAC__Metadata_Iterator *iterator)
1891 FLAC__ASSERT(0 != iterator);
1892 FLAC__ASSERT(0 != iterator->current);
1893 FLAC__ASSERT(0 != iterator->current->data);
1895 return iterator->current->data->type;
1898 FLAC_API FLAC__StreamMetadata *FLAC__metadata_iterator_get_block(FLAC__Metadata_Iterator *iterator)
1900 FLAC__ASSERT(0 != iterator);
1901 FLAC__ASSERT(0 != iterator->current);
1903 return iterator->current->data;
1906 FLAC_API FLAC__bool FLAC__metadata_iterator_set_block(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1908 FLAC__ASSERT(0 != iterator);
1909 FLAC__ASSERT(0 != block);
1910 return FLAC__metadata_iterator_delete_block(iterator, false) && FLAC__metadata_iterator_insert_block_after(iterator, block);
1913 FLAC_API FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__Metadata_Iterator *iterator, FLAC__bool replace_with_padding)
1915 FLAC__Metadata_Node *save;
1917 FLAC__ASSERT(0 != iterator);
1918 FLAC__ASSERT(0 != iterator->current);
1920 if(0 == iterator->current->prev) {
1921 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1925 save = iterator->current->prev;
1927 if(replace_with_padding) {
1928 FLAC__metadata_object_delete_data(iterator->current->data);
1929 iterator->current->data->type = FLAC__METADATA_TYPE_PADDING;
1932 chain_delete_node_(iterator->chain, iterator->current);
1935 iterator->current = save;
1939 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1941 FLAC__Metadata_Node *node;
1943 FLAC__ASSERT(0 != iterator);
1944 FLAC__ASSERT(0 != iterator->current);
1945 FLAC__ASSERT(0 != block);
1947 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1950 if(0 == iterator->current->prev) {
1951 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1955 if(0 == (node = node_new_()))
1959 iterator_insert_node_(iterator, node);
1960 iterator->current = node;
1964 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1966 FLAC__Metadata_Node *node;
1968 FLAC__ASSERT(0 != iterator);
1969 FLAC__ASSERT(0 != iterator->current);
1970 FLAC__ASSERT(0 != block);
1972 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1975 if(0 == (node = node_new_()))
1979 iterator_insert_node_after_(iterator, node);
1980 iterator->current = node;
1985 /****************************************************************************
1987 * Local function definitions
1989 ***************************************************************************/
1991 void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1997 for(i = 0; i < bytes; i++) {
1998 *(--b) = (FLAC__byte)(val & 0xff);
2003 void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
2007 for(i = 0; i < bytes; i++) {
2008 *(b++) = (FLAC__byte)(val & 0xff);
2013 void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes)
2019 for(i = 0; i < bytes; i++) {
2020 *(--b) = (FLAC__byte)(val & 0xff);
2025 FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes)
2027 FLAC__uint32 ret = 0;
2030 for(i = 0; i < bytes; i++)
2031 ret = (ret << 8) | (FLAC__uint32)(*b++);
2036 FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes)
2038 FLAC__uint32 ret = 0;
2043 for(i = 0; i < bytes; i++)
2044 ret = (ret << 8) | (FLAC__uint32)(*--b);
2049 FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes)
2051 FLAC__uint64 ret = 0;
2054 for(i = 0; i < bytes; i++)
2055 ret = (ret << 8) | (FLAC__uint64)(*b++);
2060 FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator)
2062 FLAC__ASSERT(0 != iterator);
2063 FLAC__ASSERT(0 != iterator->file);
2065 if(!read_metadata_block_header_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, &iterator->is_last, &iterator->type, &iterator->length)) {
2066 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2073 FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block)
2075 FLAC__ASSERT(0 != iterator);
2076 FLAC__ASSERT(0 != iterator->file);
2078 iterator->status = read_metadata_block_data_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, block);
2080 return (iterator->status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK);
2083 FLAC__bool read_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__bool *is_last, FLAC__MetadataType *type, unsigned *length)
2085 FLAC__byte raw_header[FLAC__STREAM_METADATA_HEADER_LENGTH];
2087 if(read_cb(raw_header, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2090 *is_last = raw_header[0] & 0x80? true : false;
2091 *type = (FLAC__MetadataType)(raw_header[0] & 0x7f);
2092 *length = unpack_uint32_(raw_header + 1, 3);
2094 /* Note that we don't check:
2095 * if(iterator->type >= FLAC__METADATA_TYPE_UNDEFINED)
2096 * we just will read in an opaque block
2102 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata *block)
2104 switch(block->type) {
2105 case FLAC__METADATA_TYPE_STREAMINFO:
2106 return read_metadata_block_data_streaminfo_cb_(handle, read_cb, &block->data.stream_info);
2107 case FLAC__METADATA_TYPE_PADDING:
2108 return read_metadata_block_data_padding_cb_(handle, seek_cb, &block->data.padding, block->length);
2109 case FLAC__METADATA_TYPE_APPLICATION:
2110 return read_metadata_block_data_application_cb_(handle, read_cb, &block->data.application, block->length);
2111 case FLAC__METADATA_TYPE_SEEKTABLE:
2112 return read_metadata_block_data_seektable_cb_(handle, read_cb, &block->data.seek_table, block->length);
2113 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2114 return read_metadata_block_data_vorbis_comment_cb_(handle, read_cb, &block->data.vorbis_comment);
2115 case FLAC__METADATA_TYPE_CUESHEET:
2116 return read_metadata_block_data_cuesheet_cb_(handle, read_cb, &block->data.cue_sheet);
2117 case FLAC__METADATA_TYPE_PICTURE:
2118 return read_metadata_block_data_picture_cb_(handle, read_cb, &block->data.picture);
2120 return read_metadata_block_data_unknown_cb_(handle, read_cb, &block->data.unknown, block->length);
2124 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block)
2126 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH], *b;
2128 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2129 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2133 /* we are using hardcoded numbers for simplicity but we should
2134 * probably eventually write a bit-level unpacker and use the
2135 * _STREAMINFO_ constants.
2137 block->min_blocksize = unpack_uint32_(b, 2); b += 2;
2138 block->max_blocksize = unpack_uint32_(b, 2); b += 2;
2139 block->min_framesize = unpack_uint32_(b, 3); b += 3;
2140 block->max_framesize = unpack_uint32_(b, 3); b += 3;
2141 block->sample_rate = (unpack_uint32_(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4);
2142 block->channels = (unsigned)((b[2] & 0x0e) >> 1) + 1;
2143 block->bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 4) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1;
2144 block->total_samples = (((FLAC__uint64)(b[3] & 0x0f)) << 32) | unpack_uint64_(b+4, 4);
2145 memcpy(block->md5sum, b+8, 16);
2147 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2150 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_Padding *block, unsigned block_length)
2152 (void)block; /* nothing to do; we don't care about reading the padding bytes */
2154 if(0 != seek_cb(handle, block_length, SEEK_CUR))
2155 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2157 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2160 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Application *block, unsigned block_length)
2162 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2164 if(read_cb(block->id, 1, id_bytes, handle) != id_bytes)
2165 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2167 if(block_length < id_bytes)
2168 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2170 block_length -= id_bytes;
2172 if(block_length == 0) {
2176 if(0 == (block->data = (FLAC__byte*)malloc(block_length)))
2177 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2179 if(read_cb(block->data, 1, block_length, handle) != block_length)
2180 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2183 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2186 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_SeekTable *block, unsigned block_length)
2189 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2191 FLAC__ASSERT(block_length % FLAC__STREAM_METADATA_SEEKPOINT_LENGTH == 0);
2193 block->num_points = block_length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
2195 if(block->num_points == 0)
2197 else if(0 == (block->points = (FLAC__StreamMetadata_SeekPoint*)safe_malloc_mul_2op_(block->num_points, /*times*/sizeof(FLAC__StreamMetadata_SeekPoint))))
2198 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2200 for(i = 0; i < block->num_points; i++) {
2201 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2202 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2203 /* some MAGIC NUMBERs here */
2204 block->points[i].sample_number = unpack_uint64_(buffer, 8);
2205 block->points[i].stream_offset = unpack_uint64_(buffer+8, 8);
2206 block->points[i].frame_samples = unpack_uint32_(buffer+16, 2);
2209 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2212 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment_Entry *entry)
2214 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2215 FLAC__byte buffer[4]; /* magic number is asserted below */
2217 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8 == sizeof(buffer));
2219 if(read_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2220 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2221 entry->length = unpack_uint32_little_endian_(buffer, entry_length_len);
2223 if(0 != entry->entry)
2226 if(entry->length == 0) {
2230 if(0 == (entry->entry = (FLAC__byte*)safe_malloc_add_2op_(entry->length, /*+*/1)))
2231 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2233 if(read_cb(entry->entry, 1, entry->length, handle) != entry->length)
2234 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2236 entry->entry[entry->length] = '\0';
2239 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2242 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment *block)
2245 FLAC__Metadata_SimpleIteratorStatus status;
2246 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2247 FLAC__byte buffer[4]; /* magic number is asserted below */
2249 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8 == sizeof(buffer));
2251 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, &(block->vendor_string))))
2254 if(read_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2255 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2256 block->num_comments = unpack_uint32_little_endian_(buffer, num_comments_len);
2258 if(block->num_comments == 0) {
2259 block->comments = 0;
2261 else if(0 == (block->comments = (FLAC__StreamMetadata_VorbisComment_Entry*)calloc(block->num_comments, sizeof(FLAC__StreamMetadata_VorbisComment_Entry))))
2262 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2264 for(i = 0; i < block->num_comments; i++) {
2265 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, block->comments + i)))
2269 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2272 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track)
2275 FLAC__byte buffer[32]; /* asserted below that this is big enough */
2277 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2278 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2279 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);
2281 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2282 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2283 if(read_cb(buffer, 1, len, handle) != len)
2284 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2285 track->offset = unpack_uint64_(buffer, len);
2287 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2288 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2289 if(read_cb(buffer, 1, len, handle) != len)
2290 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2291 track->number = (FLAC__byte)unpack_uint32_(buffer, len);
2293 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2294 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2295 if(read_cb(track->isrc, 1, len, handle) != len)
2296 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2298 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);
2299 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2300 if(read_cb(buffer, 1, len, handle) != len)
2301 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2302 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN == 1);
2303 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN == 1);
2304 track->type = buffer[0] >> 7;
2305 track->pre_emphasis = (buffer[0] >> 6) & 1;
2307 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2308 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2309 if(read_cb(buffer, 1, len, handle) != len)
2310 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2311 track->num_indices = (FLAC__byte)unpack_uint32_(buffer, len);
2313 if(track->num_indices == 0) {
2316 else if(0 == (track->indices = (FLAC__StreamMetadata_CueSheet_Index*)calloc(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index))))
2317 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2319 for(i = 0; i < track->num_indices; i++) {
2320 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2321 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2322 if(read_cb(buffer, 1, len, handle) != len)
2323 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2324 track->indices[i].offset = unpack_uint64_(buffer, len);
2326 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2327 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2328 if(read_cb(buffer, 1, len, handle) != len)
2329 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2330 track->indices[i].number = (FLAC__byte)unpack_uint32_(buffer, len);
2332 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2333 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2334 if(read_cb(buffer, 1, len, handle) != len)
2335 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2338 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2341 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block)
2344 FLAC__Metadata_SimpleIteratorStatus status;
2345 FLAC__byte buffer[1024]; /* MSVC needs a constant expression so we put a magic number and assert */
2347 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN)/8 <= sizeof(buffer));
2348 FLAC__ASSERT(sizeof(FLAC__uint64) <= sizeof(buffer));
2350 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2351 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2352 if(read_cb(block->media_catalog_number, 1, len, handle) != len)
2353 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2355 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2356 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2357 if(read_cb(buffer, 1, len, handle) != len)
2358 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2359 block->lead_in = unpack_uint64_(buffer, len);
2361 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2362 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2363 if(read_cb(buffer, 1, len, handle) != len)
2364 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2365 block->is_cd = buffer[0]&0x80? true : false;
2367 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2368 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2369 if(read_cb(buffer, 1, len, handle) != len)
2370 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2371 block->num_tracks = unpack_uint32_(buffer, len);
2373 if(block->num_tracks == 0) {
2376 else if(0 == (block->tracks = (FLAC__StreamMetadata_CueSheet_Track*)calloc(block->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track))))
2377 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2379 for(i = 0; i < block->num_tracks; i++) {
2380 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_cuesheet_track_cb_(handle, read_cb, block->tracks + i)))
2384 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2387 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)
2389 FLAC__byte buffer[sizeof(FLAC__uint32)];
2391 FLAC__ASSERT(0 != data);
2392 FLAC__ASSERT(length_len%8 == 0);
2394 length_len /= 8; /* convert to bytes */
2396 FLAC__ASSERT(sizeof(buffer) >= length_len);
2398 if(read_cb(buffer, 1, length_len, handle) != length_len)
2399 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2400 *length = unpack_uint32_(buffer, length_len);
2405 if(0 == (*data = (FLAC__byte*)safe_malloc_add_2op_(*length, /*+*/1)))
2406 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2409 if(read_cb(*data, 1, *length, handle) != *length)
2410 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2413 (*data)[*length] = '\0';
2415 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2418 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block)
2420 FLAC__Metadata_SimpleIteratorStatus status;
2421 FLAC__byte buffer[4]; /* asserted below that this is big enough */
2424 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2425 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2426 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2427 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2428 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2430 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_TYPE_LEN % 8 == 0);
2431 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN / 8;
2432 if(read_cb(buffer, 1, len, handle) != len)
2433 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2434 block->type = (FLAC__StreamMetadata_Picture_Type)unpack_uint32_(buffer, len);
2436 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)
2439 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)
2442 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN % 8 == 0);
2443 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN / 8;
2444 if(read_cb(buffer, 1, len, handle) != len)
2445 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2446 block->width = unpack_uint32_(buffer, len);
2448 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN % 8 == 0);
2449 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN / 8;
2450 if(read_cb(buffer, 1, len, handle) != len)
2451 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2452 block->height = unpack_uint32_(buffer, len);
2454 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN % 8 == 0);
2455 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN / 8;
2456 if(read_cb(buffer, 1, len, handle) != len)
2457 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2458 block->depth = unpack_uint32_(buffer, len);
2460 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_COLORS_LEN % 8 == 0);
2461 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN / 8;
2462 if(read_cb(buffer, 1, len, handle) != len)
2463 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2464 block->colors = unpack_uint32_(buffer, len);
2466 /* for convenience we use read_metadata_block_data_picture_cstring_cb_() even though it adds an extra terminating NUL we don't use */
2467 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)
2470 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2473 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2475 if(block_length == 0) {
2479 if(0 == (block->data = (FLAC__byte*)malloc(block_length)))
2480 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2482 if(read_cb(block->data, 1, block_length, handle) != block_length)
2483 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2486 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2489 FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2491 FLAC__ASSERT(0 != file);
2492 FLAC__ASSERT(0 != status);
2494 if(!write_metadata_block_header_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2495 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2502 FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2504 FLAC__ASSERT(0 != file);
2505 FLAC__ASSERT(0 != status);
2507 if (write_metadata_block_data_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2508 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2512 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2517 FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2519 FLAC__byte buffer[FLAC__STREAM_METADATA_HEADER_LENGTH];
2521 FLAC__ASSERT(block->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
2523 buffer[0] = (block->is_last? 0x80 : 0) | (FLAC__byte)block->type;
2524 pack_uint32_(block->length, buffer + 1, 3);
2526 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2532 FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2534 FLAC__ASSERT(0 != block);
2536 switch(block->type) {
2537 case FLAC__METADATA_TYPE_STREAMINFO:
2538 return write_metadata_block_data_streaminfo_cb_(handle, write_cb, &block->data.stream_info);
2539 case FLAC__METADATA_TYPE_PADDING:
2540 return write_metadata_block_data_padding_cb_(handle, write_cb, &block->data.padding, block->length);
2541 case FLAC__METADATA_TYPE_APPLICATION:
2542 return write_metadata_block_data_application_cb_(handle, write_cb, &block->data.application, block->length);
2543 case FLAC__METADATA_TYPE_SEEKTABLE:
2544 return write_metadata_block_data_seektable_cb_(handle, write_cb, &block->data.seek_table);
2545 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2546 return write_metadata_block_data_vorbis_comment_cb_(handle, write_cb, &block->data.vorbis_comment);
2547 case FLAC__METADATA_TYPE_CUESHEET:
2548 return write_metadata_block_data_cuesheet_cb_(handle, write_cb, &block->data.cue_sheet);
2549 case FLAC__METADATA_TYPE_PICTURE:
2550 return write_metadata_block_data_picture_cb_(handle, write_cb, &block->data.picture);
2552 return write_metadata_block_data_unknown_cb_(handle, write_cb, &block->data.unknown, block->length);
2556 FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block)
2558 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH];
2559 const unsigned channels1 = block->channels - 1;
2560 const unsigned bps1 = block->bits_per_sample - 1;
2562 /* we are using hardcoded numbers for simplicity but we should
2563 * probably eventually write a bit-level packer and use the
2564 * _STREAMINFO_ constants.
2566 pack_uint32_(block->min_blocksize, buffer, 2);
2567 pack_uint32_(block->max_blocksize, buffer+2, 2);
2568 pack_uint32_(block->min_framesize, buffer+4, 3);
2569 pack_uint32_(block->max_framesize, buffer+7, 3);
2570 buffer[10] = (block->sample_rate >> 12) & 0xff;
2571 buffer[11] = (block->sample_rate >> 4) & 0xff;
2572 buffer[12] = ((block->sample_rate & 0x0f) << 4) | (channels1 << 1) | (bps1 >> 4);
2573 buffer[13] = (FLAC__byte)(((bps1 & 0x0f) << 4) | ((block->total_samples >> 32) & 0x0f));
2574 pack_uint32_((FLAC__uint32)block->total_samples, buffer+14, 4);
2575 memcpy(buffer+18, block->md5sum, 16);
2577 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2583 FLAC__bool write_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Padding *block, unsigned block_length)
2585 unsigned i, n = block_length;
2586 FLAC__byte buffer[1024];
2590 memset(buffer, 0, 1024);
2592 for(i = 0; i < n/1024; i++)
2593 if(write_cb(buffer, 1, 1024, handle) != 1024)
2598 if(write_cb(buffer, 1, n, handle) != n)
2604 FLAC__bool write_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Application *block, unsigned block_length)
2606 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2608 if(write_cb(block->id, 1, id_bytes, handle) != id_bytes)
2611 block_length -= id_bytes;
2613 if(write_cb(block->data, 1, block_length, handle) != block_length)
2619 FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block)
2622 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2624 for(i = 0; i < block->num_points; i++) {
2625 /* some MAGIC NUMBERs here */
2626 pack_uint64_(block->points[i].sample_number, buffer, 8);
2627 pack_uint64_(block->points[i].stream_offset, buffer+8, 8);
2628 pack_uint32_(block->points[i].frame_samples, buffer+16, 2);
2629 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2636 FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block)
2639 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2640 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2641 FLAC__byte buffer[4]; /* magic number is asserted below */
2643 FLAC__ASSERT(max(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN, FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8 == sizeof(buffer));
2645 pack_uint32_little_endian_(block->vendor_string.length, buffer, entry_length_len);
2646 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2648 if(write_cb(block->vendor_string.entry, 1, block->vendor_string.length, handle) != block->vendor_string.length)
2651 pack_uint32_little_endian_(block->num_comments, buffer, num_comments_len);
2652 if(write_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2655 for(i = 0; i < block->num_comments; i++) {
2656 pack_uint32_little_endian_(block->comments[i].length, buffer, entry_length_len);
2657 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2659 if(write_cb(block->comments[i].entry, 1, block->comments[i].length, handle) != block->comments[i].length)
2666 FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block)
2669 FLAC__byte buffer[1024]; /* asserted below that this is big enough */
2671 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2672 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN/8);
2673 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);
2674 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2676 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2677 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2678 if(write_cb(block->media_catalog_number, 1, len, handle) != len)
2681 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2682 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2683 pack_uint64_(block->lead_in, buffer, len);
2684 if(write_cb(buffer, 1, len, handle) != len)
2687 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2688 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2689 memset(buffer, 0, len);
2692 if(write_cb(buffer, 1, len, handle) != len)
2695 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2696 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2697 pack_uint32_(block->num_tracks, buffer, len);
2698 if(write_cb(buffer, 1, len, handle) != len)
2701 for(i = 0; i < block->num_tracks; i++) {
2702 FLAC__StreamMetadata_CueSheet_Track *track = block->tracks + i;
2704 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2705 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2706 pack_uint64_(track->offset, buffer, len);
2707 if(write_cb(buffer, 1, len, handle) != len)
2710 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2711 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2712 pack_uint32_(track->number, buffer, len);
2713 if(write_cb(buffer, 1, len, handle) != len)
2716 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2717 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2718 if(write_cb(track->isrc, 1, len, handle) != len)
2721 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);
2722 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2723 memset(buffer, 0, len);
2724 buffer[0] = (track->type << 7) | (track->pre_emphasis << 6);
2725 if(write_cb(buffer, 1, len, handle) != len)
2728 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2729 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2730 pack_uint32_(track->num_indices, buffer, len);
2731 if(write_cb(buffer, 1, len, handle) != len)
2734 for(j = 0; j < track->num_indices; j++) {
2735 FLAC__StreamMetadata_CueSheet_Index *index = track->indices + j;
2737 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2738 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2739 pack_uint64_(index->offset, buffer, len);
2740 if(write_cb(buffer, 1, len, handle) != len)
2743 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2744 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2745 pack_uint32_(index->number, buffer, len);
2746 if(write_cb(buffer, 1, len, handle) != len)
2749 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2750 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2751 memset(buffer, 0, len);
2752 if(write_cb(buffer, 1, len, handle) != len)
2760 FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block)
2764 FLAC__byte buffer[4]; /* magic number is asserted below */
2766 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_TYPE_LEN%8);
2767 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN%8);
2768 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN%8);
2769 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN%8);
2770 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN%8);
2771 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN%8);
2772 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_COLORS_LEN%8);
2773 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN%8);
2774 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2775 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8);
2776 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8);
2777 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2778 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2779 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2780 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2781 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8);
2783 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8;
2784 pack_uint32_(block->type, buffer, len);
2785 if(write_cb(buffer, 1, len, handle) != len)
2788 len = FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8;
2789 slen = strlen(block->mime_type);
2790 pack_uint32_(slen, buffer, len);
2791 if(write_cb(buffer, 1, len, handle) != len)
2793 if(write_cb(block->mime_type, 1, slen, handle) != slen)
2796 len = FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8;
2797 slen = strlen((const char *)block->description);
2798 pack_uint32_(slen, buffer, len);
2799 if(write_cb(buffer, 1, len, handle) != len)
2801 if(write_cb(block->description, 1, slen, handle) != slen)
2804 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8;
2805 pack_uint32_(block->width, buffer, len);
2806 if(write_cb(buffer, 1, len, handle) != len)
2809 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8;
2810 pack_uint32_(block->height, buffer, len);
2811 if(write_cb(buffer, 1, len, handle) != len)
2814 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8;
2815 pack_uint32_(block->depth, buffer, len);
2816 if(write_cb(buffer, 1, len, handle) != len)
2819 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8;
2820 pack_uint32_(block->colors, buffer, len);
2821 if(write_cb(buffer, 1, len, handle) != len)
2824 len = FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8;
2825 pack_uint32_(block->data_length, buffer, len);
2826 if(write_cb(buffer, 1, len, handle) != len)
2828 if(write_cb(block->data, 1, block->data_length, handle) != block->data_length)
2834 FLAC__bool write_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2836 if(write_cb(block->data, 1, block_length, handle) != block_length)
2842 FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block)
2844 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2845 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2849 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2852 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2855 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2856 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2860 return read_metadata_block_header_(iterator);
2863 FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last)
2865 FLAC__StreamMetadata *padding;
2867 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2868 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2872 block->is_last = false;
2874 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2877 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2880 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
2881 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2883 padding->is_last = padding_is_last;
2884 padding->length = padding_length;
2886 if(!write_metadata_block_header_(iterator->file, &iterator->status, padding)) {
2887 FLAC__metadata_object_delete(padding);
2891 if(!write_metadata_block_data_(iterator->file, &iterator->status, padding)) {
2892 FLAC__metadata_object_delete(padding);
2896 FLAC__metadata_object_delete(padding);
2898 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2899 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2903 return read_metadata_block_header_(iterator);
2906 FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append)
2910 int fixup_is_last_code = 0; /* 0 => no need to change any is_last flags */
2911 off_t fixup_is_last_flag_offset = -1;
2913 FLAC__ASSERT(0 != block || append == false);
2915 if(iterator->is_last) {
2917 fixup_is_last_code = 1; /* 1 => clear the is_last flag at the following offset */
2918 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2920 else if(0 == block) {
2921 simple_iterator_push_(iterator);
2922 if(!FLAC__metadata_simple_iterator_prev(iterator)) {
2923 (void)simple_iterator_pop_(iterator);
2926 fixup_is_last_code = -1; /* -1 => set the is_last the flag at the following offset */
2927 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2928 if(!simple_iterator_pop_(iterator))
2933 if(!simple_iterator_copy_file_prefix_(iterator, &tempfile, &tempfilename, append))
2937 if(!write_metadata_block_header_(tempfile, &iterator->status, block)) {
2938 cleanup_tempfile_(&tempfile, &tempfilename);
2942 if(!write_metadata_block_data_(tempfile, &iterator->status, block)) {
2943 cleanup_tempfile_(&tempfile, &tempfilename);
2948 if(!simple_iterator_copy_file_postfix_(iterator, &tempfile, &tempfilename, fixup_is_last_code, fixup_is_last_flag_offset, block==0))
2952 return FLAC__metadata_simple_iterator_next(iterator);
2957 void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator)
2959 FLAC__ASSERT(iterator->depth+1 < SIMPLE_ITERATOR_MAX_PUSH_DEPTH);
2960 iterator->offset[iterator->depth+1] = iterator->offset[iterator->depth];
2964 FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator)
2966 FLAC__ASSERT(iterator->depth > 0);
2968 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2969 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2973 return read_metadata_block_header_(iterator);
2980 * 3: not a FLAC file
2982 unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb)
2984 FLAC__byte buffer[4];
2988 FLAC__ASSERT(FLAC__STREAM_SYNC_LENGTH == sizeof(buffer));
2990 /* skip any id3v2 tag */
2992 n = read_cb(buffer, 1, 4, handle);
2997 else if(0 == memcmp(buffer, "ID3", 3)) {
2998 unsigned tag_length = 0;
3000 /* skip to the tag length */
3001 if(seek_cb(handle, 2, SEEK_CUR) < 0)
3004 /* read the length */
3005 for(i = 0; i < 4; i++) {
3006 if(read_cb(buffer, 1, 1, handle) < 1 || buffer[0] & 0x80)
3009 tag_length |= (buffer[0] & 0x7f);
3012 /* skip the rest of the tag */
3013 if(seek_cb(handle, tag_length, SEEK_CUR) < 0)
3016 /* read the stream sync code */
3018 n = read_cb(buffer, 1, 4, handle);
3025 /* check for the fLaC signature */
3026 if(0 == memcmp(FLAC__STREAM_SYNC_STRING, buffer, FLAC__STREAM_SYNC_LENGTH))
3032 unsigned seek_to_first_metadata_block_(FILE *f)
3034 return seek_to_first_metadata_block_cb_((FLAC__IOHandle)f, (FLAC__IOCallback_Read)fread, fseek_wrapper_);
3037 FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append)
3039 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];
3041 if(0 != fseeko(iterator->file, 0, SEEK_SET)) {
3042 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3045 if(!open_tempfile_(iterator->filename, iterator->tempfile_path_prefix, tempfile, tempfilename, &iterator->status)) {
3046 cleanup_tempfile_(tempfile, tempfilename);
3049 if(!copy_n_bytes_from_file_(iterator->file, *tempfile, offset_end, &iterator->status)) {
3050 cleanup_tempfile_(tempfile, tempfilename);
3057 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)
3059 off_t save_offset = iterator->offset[iterator->depth];
3060 FLAC__ASSERT(0 != *tempfile);
3062 if(0 != fseeko(iterator->file, save_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length, SEEK_SET)) {
3063 cleanup_tempfile_(tempfile, tempfilename);
3064 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3067 if(!copy_remaining_bytes_from_file_(iterator->file, *tempfile, &iterator->status)) {
3068 cleanup_tempfile_(tempfile, tempfilename);
3072 if(fixup_is_last_code != 0) {
3074 * if code == 1, it means a block was appended to the end so
3075 * we have to clear the is_last flag of the previous block
3076 * if code == -1, it means the last block was deleted so
3077 * we have to set the is_last flag of the previous block
3079 /* MAGIC NUMBERs here; we know the is_last flag is the high bit of the byte at this location */
3081 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3082 cleanup_tempfile_(tempfile, tempfilename);
3083 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3086 if(fread(&x, 1, 1, *tempfile) != 1) {
3087 cleanup_tempfile_(tempfile, tempfilename);
3088 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3091 if(fixup_is_last_code > 0) {
3092 FLAC__ASSERT(x & 0x80);
3096 FLAC__ASSERT(!(x & 0x80));
3099 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3100 cleanup_tempfile_(tempfile, tempfilename);
3101 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3104 if(local__fwrite(&x, 1, 1, *tempfile) != 1) {
3105 cleanup_tempfile_(tempfile, tempfilename);
3106 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3111 (void)fclose(iterator->file);
3113 if(!transport_tempfile_(iterator->filename, tempfile, tempfilename, &iterator->status))
3116 if(iterator->has_stats)
3117 set_file_stats_(iterator->filename, &iterator->stats);
3119 if(!simple_iterator_prime_input_(iterator, !iterator->is_writable))
3122 while(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length < save_offset)
3123 if(!FLAC__metadata_simple_iterator_next(iterator))
3128 /* move the iterator to it's original block faster by faking a push, then doing a pop_ */
3129 FLAC__ASSERT(iterator->depth == 0);
3130 iterator->offset[0] = save_offset;
3132 return simple_iterator_pop_(iterator);
3136 FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status)
3138 FLAC__byte buffer[8192];
3141 FLAC__ASSERT(bytes >= 0);
3143 n = min(sizeof(buffer), (size_t)bytes);
3144 if(fread(buffer, 1, n, file) != n) {
3145 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3148 if(local__fwrite(buffer, 1, n, tempfile) != n) {
3149 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3158 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)
3160 FLAC__byte buffer[8192];
3163 FLAC__ASSERT(bytes >= 0);
3165 n = min(sizeof(buffer), (size_t)bytes);
3166 if(read_cb(buffer, 1, n, handle) != n) {
3167 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3170 if(temp_write_cb(buffer, 1, n, temp_handle) != n) {
3171 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3180 FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status)
3182 FLAC__byte buffer[8192];
3185 while(!feof(file)) {
3186 n = fread(buffer, 1, sizeof(buffer), file);
3187 if(n == 0 && !feof(file)) {
3188 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3191 if(n > 0 && local__fwrite(buffer, 1, n, tempfile) != n) {
3192 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3200 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)
3202 FLAC__byte buffer[8192];
3205 while(!eof_cb(handle)) {
3206 n = read_cb(buffer, 1, sizeof(buffer), handle);
3207 if(n == 0 && !eof_cb(handle)) {
3208 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3211 if(n > 0 && temp_write_cb(buffer, 1, n, temp_handle) != n) {
3212 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3220 FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3222 static const char *tempfile_suffix = ".metadata_edit";
3223 if(0 == tempfile_path_prefix) {
3224 if(0 == (*tempfilename = (char*)safe_malloc_add_3op_(strlen(filename), /*+*/strlen(tempfile_suffix), /*+*/1))) {
3225 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3228 strcpy(*tempfilename, filename);
3229 strcat(*tempfilename, tempfile_suffix);
3232 const char *p = strrchr(filename, '/');
3238 if(0 == (*tempfilename = (char*)safe_malloc_add_4op_(strlen(tempfile_path_prefix), /*+*/strlen(p), /*+*/strlen(tempfile_suffix), /*+*/2))) {
3239 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3242 strcpy(*tempfilename, tempfile_path_prefix);
3243 strcat(*tempfilename, "/");
3244 strcat(*tempfilename, p);
3245 strcat(*tempfilename, tempfile_suffix);
3248 if(0 == (*tempfile = fopen(*tempfilename, "w+b"))) {
3249 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
3256 FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3258 FLAC__ASSERT(0 != filename);
3259 FLAC__ASSERT(0 != tempfile);
3260 FLAC__ASSERT(0 != *tempfile);
3261 FLAC__ASSERT(0 != tempfilename);
3262 FLAC__ASSERT(0 != *tempfilename);
3263 FLAC__ASSERT(0 != status);
3265 (void)fclose(*tempfile);
3268 #if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__ || defined __EMX__
3269 /* on some flavors of windows, rename() will fail if the destination already exists */
3270 if(unlink(filename) < 0) {
3271 cleanup_tempfile_(tempfile, tempfilename);
3272 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR;
3277 /*@@@ to fully support the tempfile_path_prefix we need to update this piece to actually copy across filesystems instead of just rename(): */
3278 if(0 != rename(*tempfilename, filename)) {
3279 cleanup_tempfile_(tempfile, tempfilename);
3280 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR;
3284 cleanup_tempfile_(tempfile, tempfilename);
3289 void cleanup_tempfile_(FILE **tempfile, char **tempfilename)
3291 if(0 != *tempfile) {
3292 (void)fclose(*tempfile);
3296 if(0 != *tempfilename) {
3297 (void)unlink(*tempfilename);
3298 free(*tempfilename);
3303 FLAC__bool get_file_stats_(const char *filename, struct stat *stats)
3305 FLAC__ASSERT(0 != filename);
3306 FLAC__ASSERT(0 != stats);
3307 return (0 == stat(filename, stats));
3310 void set_file_stats_(const char *filename, struct stat *stats)
3312 struct utimbuf srctime;
3314 FLAC__ASSERT(0 != filename);
3315 FLAC__ASSERT(0 != stats);
3317 srctime.actime = stats->st_atime;
3318 srctime.modtime = stats->st_mtime;
3319 (void)chmod(filename, stats->st_mode);
3320 (void)utime(filename, &srctime);
3321 #if !defined _MSC_VER && !defined __BORLANDC__ && !defined __MINGW32__ && !defined __EMX__ && !defined TARGET_MSDOS
3322 (void)chown(filename, stats->st_uid, -1);
3323 (void)chown(filename, -1, stats->st_gid);
3327 int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence)
3329 return fseeko((FILE*)handle, (off_t)offset, whence);
3332 FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle)
3334 return ftello((FILE*)handle);
3337 FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status)
3340 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK:
3341 return FLAC__METADATA_CHAIN_STATUS_OK;
3342 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT:
3343 return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT;
3344 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE:
3345 return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
3346 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE:
3347 return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
3348 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE:
3349 return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE;
3350 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA:
3351 return FLAC__METADATA_CHAIN_STATUS_BAD_METADATA;
3352 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR:
3353 return FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
3354 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR:
3355 return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
3356 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR:
3357 return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
3358 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR:
3359 return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR;
3360 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR:
3361 return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR;
3362 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR:
3363 return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
3364 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR:
3366 return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;