1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2001,2002,2003,2004,2005,2006,2007,2008,2009 Josh Coalson
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * - Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * - Neither the name of the Xiph.org Foundation nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 #if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__
42 #if defined __BORLANDC__
43 #include <utime.h> /* for utime() */
45 #include <sys/utime.h> /* for utime() */
47 #include <io.h> /* for chmod() */
48 #include <sys/types.h> /* for off_t */
50 #include <sys/types.h> /* some flavors of BSD (like OS X) require this to get time_t */
51 #include <utime.h> /* for utime() */
52 #include <unistd.h> /* for chown(), unlink() */
54 #include <sys/stat.h> /* for stat(), maybe chmod() */
56 #include "private/metadata.h"
58 #include "FLAC/assert.h"
59 #include "FLAC/stream_decoder.h"
60 #include "share/alloc.h"
61 #include "share/compat.h"
62 #include "private/macros.h"
64 /****************************************************************************
66 * Local function declarations
68 ***************************************************************************/
70 static void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
71 static void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
72 static void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes);
73 static FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes);
74 static FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes);
75 static FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes);
77 static FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator);
78 static FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block);
79 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);
80 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);
81 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block);
82 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);
83 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);
84 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);
85 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);
86 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment *block);
87 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track);
88 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block);
89 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block);
90 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);
92 static FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
93 static FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
94 static FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
95 static FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
96 static FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block);
97 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);
98 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);
99 static FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block);
100 static FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block);
101 static FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block);
102 static FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block);
103 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);
105 static FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block);
106 static FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last);
107 static FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append);
109 static void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator);
110 static FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator);
112 static unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb);
113 static unsigned seek_to_first_metadata_block_(FILE *f);
115 static FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append);
116 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);
118 static FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status);
119 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);
120 static FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status);
121 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);
123 static FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
124 static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
125 static void cleanup_tempfile_(FILE **tempfile, char **tempfilename);
127 static FLAC__bool get_file_stats_(const char *filename, struct stat *stats);
128 static void set_file_stats_(const char *filename, struct stat *stats);
130 static int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence);
131 static FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle);
133 static FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status);
136 #ifdef FLAC__VALGRIND_TESTING
137 static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
139 size_t ret = fwrite(ptr, size, nmemb, stream);
145 #define local__fwrite fwrite
148 /****************************************************************************
150 * Level 0 implementation
152 ***************************************************************************/
154 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
155 static void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
156 static void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
159 FLAC__bool got_error;
160 FLAC__StreamMetadata *object;
161 } level0_client_data;
163 static FLAC__StreamMetadata *get_one_metadata_block_(const char *filename, FLAC__MetadataType type)
165 level0_client_data cd;
166 FLAC__StreamDecoder *decoder;
168 FLAC__ASSERT(0 != filename);
170 cd.got_error = false;
173 decoder = FLAC__stream_decoder_new();
178 FLAC__stream_decoder_set_md5_checking(decoder, false);
179 FLAC__stream_decoder_set_metadata_ignore_all(decoder);
180 FLAC__stream_decoder_set_metadata_respond(decoder, type);
182 if(FLAC__stream_decoder_init_file(decoder, filename, write_callback_, metadata_callback_, error_callback_, &cd) != FLAC__STREAM_DECODER_INIT_STATUS_OK || cd.got_error) {
183 (void)FLAC__stream_decoder_finish(decoder);
184 FLAC__stream_decoder_delete(decoder);
188 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder) || cd.got_error) {
189 (void)FLAC__stream_decoder_finish(decoder);
190 FLAC__stream_decoder_delete(decoder);
192 FLAC__metadata_object_delete(cd.object);
196 (void)FLAC__stream_decoder_finish(decoder);
197 FLAC__stream_decoder_delete(decoder);
202 FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo)
204 FLAC__StreamMetadata *object;
206 FLAC__ASSERT(0 != filename);
207 FLAC__ASSERT(0 != streaminfo);
209 object = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_STREAMINFO);
212 /* can just copy the contents since STREAMINFO has no internal structure */
213 *streaminfo = *object;
214 FLAC__metadata_object_delete(object);
222 FLAC_API FLAC__bool FLAC__metadata_get_tags(const char *filename, FLAC__StreamMetadata **tags)
224 FLAC__ASSERT(0 != filename);
225 FLAC__ASSERT(0 != tags);
227 *tags = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_VORBIS_COMMENT);
232 FLAC_API FLAC__bool FLAC__metadata_get_cuesheet(const char *filename, FLAC__StreamMetadata **cuesheet)
234 FLAC__ASSERT(0 != filename);
235 FLAC__ASSERT(0 != cuesheet);
237 *cuesheet = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_CUESHEET);
239 return 0 != *cuesheet;
242 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
244 (void)decoder, (void)frame, (void)buffer, (void)client_data;
246 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
249 void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
251 level0_client_data *cd = (level0_client_data *)client_data;
255 * we assume we only get here when the one metadata block we were
256 * looking for was passed to us
258 if(!cd->got_error && 0 == cd->object) {
259 if(0 == (cd->object = FLAC__metadata_object_clone(metadata)))
260 cd->got_error = true;
264 void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
266 level0_client_data *cd = (level0_client_data *)client_data;
269 if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
270 cd->got_error = true;
273 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)
275 FLAC__Metadata_SimpleIterator *it;
276 FLAC__uint64 max_area_seen = 0;
277 FLAC__uint64 max_depth_seen = 0;
279 FLAC__ASSERT(0 != filename);
280 FLAC__ASSERT(0 != picture);
284 it = FLAC__metadata_simple_iterator_new();
287 if(!FLAC__metadata_simple_iterator_init(it, filename, /*read_only=*/true, /*preserve_file_stats=*/true)) {
288 FLAC__metadata_simple_iterator_delete(it);
292 if(FLAC__metadata_simple_iterator_get_block_type(it) == FLAC__METADATA_TYPE_PICTURE) {
293 FLAC__StreamMetadata *obj = FLAC__metadata_simple_iterator_get_block(it);
294 FLAC__uint64 area = (FLAC__uint64)obj->data.picture.width * (FLAC__uint64)obj->data.picture.height;
295 /* check constraints */
297 (type == (FLAC__StreamMetadata_Picture_Type)(-1) || type == obj->data.picture.type) &&
298 (mime_type == 0 || !strcmp(mime_type, obj->data.picture.mime_type)) &&
299 (description == 0 || !strcmp((const char *)description, (const char *)obj->data.picture.description)) &&
300 obj->data.picture.width <= max_width &&
301 obj->data.picture.height <= max_height &&
302 obj->data.picture.depth <= max_depth &&
303 obj->data.picture.colors <= max_colors &&
304 (area > max_area_seen || (area == max_area_seen && obj->data.picture.depth > max_depth_seen))
307 FLAC__metadata_object_delete(*picture);
309 max_area_seen = area;
310 max_depth_seen = obj->data.picture.depth;
313 FLAC__metadata_object_delete(obj);
316 } while(FLAC__metadata_simple_iterator_next(it));
318 FLAC__metadata_simple_iterator_delete(it);
320 return (0 != *picture);
324 /****************************************************************************
326 * Level 1 implementation
328 ***************************************************************************/
330 #define SIMPLE_ITERATOR_MAX_PUSH_DEPTH (1+4)
331 /* 1 for initial offset, +4 for our own personal use */
333 struct FLAC__Metadata_SimpleIterator {
335 char *filename, *tempfile_path_prefix;
337 FLAC__bool has_stats;
338 FLAC__bool is_writable;
339 FLAC__Metadata_SimpleIteratorStatus status;
340 off_t offset[SIMPLE_ITERATOR_MAX_PUSH_DEPTH];
341 off_t first_offset; /* this is the offset to the STREAMINFO block */
343 /* this is the metadata block header of the current block we are pointing to: */
345 FLAC__MetadataType type;
349 FLAC_API const char * const FLAC__Metadata_SimpleIteratorStatusString[] = {
350 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK",
351 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT",
352 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE",
353 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE",
354 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE",
355 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA",
356 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR",
357 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR",
358 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR",
359 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR",
360 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR",
361 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR",
362 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR"
366 FLAC_API FLAC__Metadata_SimpleIterator *FLAC__metadata_simple_iterator_new(void)
368 FLAC__Metadata_SimpleIterator *iterator = calloc(1, sizeof(FLAC__Metadata_SimpleIterator));
372 iterator->filename = 0;
373 iterator->tempfile_path_prefix = 0;
374 iterator->has_stats = false;
375 iterator->is_writable = false;
376 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
377 iterator->first_offset = iterator->offset[0] = -1;
384 static void simple_iterator_free_guts_(FLAC__Metadata_SimpleIterator *iterator)
386 FLAC__ASSERT(0 != iterator);
388 if(0 != iterator->file) {
389 fclose(iterator->file);
391 if(iterator->has_stats)
392 set_file_stats_(iterator->filename, &iterator->stats);
394 if(0 != iterator->filename) {
395 free(iterator->filename);
396 iterator->filename = 0;
398 if(0 != iterator->tempfile_path_prefix) {
399 free(iterator->tempfile_path_prefix);
400 iterator->tempfile_path_prefix = 0;
404 FLAC_API void FLAC__metadata_simple_iterator_delete(FLAC__Metadata_SimpleIterator *iterator)
406 FLAC__ASSERT(0 != iterator);
408 simple_iterator_free_guts_(iterator);
412 FLAC_API FLAC__Metadata_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__Metadata_SimpleIterator *iterator)
414 FLAC__Metadata_SimpleIteratorStatus status;
416 FLAC__ASSERT(0 != iterator);
418 status = iterator->status;
419 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
423 static FLAC__bool simple_iterator_prime_input_(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool read_only)
427 FLAC__ASSERT(0 != iterator);
429 if(read_only || 0 == (iterator->file = fopen(iterator->filename, "r+b"))) {
430 iterator->is_writable = false;
431 if(read_only || errno == EACCES) {
432 if(0 == (iterator->file = fopen(iterator->filename, "rb"))) {
433 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
438 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
443 iterator->is_writable = true;
446 ret = seek_to_first_metadata_block_(iterator->file);
450 iterator->first_offset = iterator->offset[iterator->depth] = ftello(iterator->file);
451 return read_metadata_block_header_(iterator);
453 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
456 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
459 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE;
468 @@@ If we decide to finish implementing this, put this comment back in metadata.h
470 * The 'tempfile_path_prefix' allows you to specify a directory where
471 * tempfiles should go. Remember that if your metadata edits cause the
472 * FLAC file to grow, the entire file will have to be rewritten. If
473 * 'tempfile_path_prefix' is NULL, the temp file will be written in the
474 * same directory as the original FLAC file. This makes replacing the
475 * original with the tempfile fast but requires extra space in the same
476 * partition for the tempfile. If space is a problem, you can pass a
477 * directory name belonging to a different partition in
478 * 'tempfile_path_prefix'. Note that you should use the forward slash
479 * '/' as the directory separator. A trailing slash is not needed; it
480 * will be added automatically.
482 FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats, const char *tempfile_path_prefix);
485 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)
487 const char *tempfile_path_prefix = 0; /*@@@ search for comments near 'rename(...)' for what it will take to finish implementing this */
489 FLAC__ASSERT(0 != iterator);
490 FLAC__ASSERT(0 != filename);
492 simple_iterator_free_guts_(iterator);
494 if(!read_only && preserve_file_stats)
495 iterator->has_stats = get_file_stats_(filename, &iterator->stats);
497 if(0 == (iterator->filename = strdup(filename))) {
498 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
501 if(0 != tempfile_path_prefix && 0 == (iterator->tempfile_path_prefix = strdup(tempfile_path_prefix))) {
502 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
506 return simple_iterator_prime_input_(iterator, read_only);
509 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__Metadata_SimpleIterator *iterator)
511 FLAC__ASSERT(0 != iterator);
512 FLAC__ASSERT(0 != iterator->file);
514 return iterator->is_writable;
517 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__Metadata_SimpleIterator *iterator)
519 FLAC__ASSERT(0 != iterator);
520 FLAC__ASSERT(0 != iterator->file);
522 if(iterator->is_last)
525 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
526 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
530 iterator->offset[iterator->depth] = ftello(iterator->file);
532 return read_metadata_block_header_(iterator);
535 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__Metadata_SimpleIterator *iterator)
539 FLAC__ASSERT(0 != iterator);
540 FLAC__ASSERT(0 != iterator->file);
542 if(iterator->offset[iterator->depth] == iterator->first_offset)
545 if(0 != fseeko(iterator->file, iterator->first_offset, SEEK_SET)) {
546 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
549 this_offset = iterator->first_offset;
550 if(!read_metadata_block_header_(iterator))
553 /* we ignore any error from ftello() and catch it in fseeko() */
554 while(ftello(iterator->file) + (off_t)iterator->length < iterator->offset[iterator->depth]) {
555 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
556 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
559 this_offset = ftello(iterator->file);
560 if(!read_metadata_block_header_(iterator))
564 iterator->offset[iterator->depth] = this_offset;
570 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_last(const FLAC__Metadata_SimpleIterator *iterator)
572 FLAC__ASSERT(0 != iterator);
573 FLAC__ASSERT(0 != iterator->file);
575 return iterator->is_last;
579 FLAC_API off_t FLAC__metadata_simple_iterator_get_block_offset(const FLAC__Metadata_SimpleIterator *iterator)
581 FLAC__ASSERT(0 != iterator);
582 FLAC__ASSERT(0 != iterator->file);
584 return iterator->offset[iterator->depth];
587 FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator)
589 FLAC__ASSERT(0 != iterator);
590 FLAC__ASSERT(0 != iterator->file);
592 return iterator->type;
596 FLAC_API unsigned FLAC__metadata_simple_iterator_get_block_length(const FLAC__Metadata_SimpleIterator *iterator)
598 FLAC__ASSERT(0 != iterator);
599 FLAC__ASSERT(0 != iterator->file);
601 return iterator->length;
605 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_get_application_id(FLAC__Metadata_SimpleIterator *iterator, FLAC__byte *id)
607 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
609 FLAC__ASSERT(0 != iterator);
610 FLAC__ASSERT(0 != iterator->file);
611 FLAC__ASSERT(0 != id);
613 if(iterator->type != FLAC__METADATA_TYPE_APPLICATION) {
614 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
618 if(fread(id, 1, id_bytes, iterator->file) != id_bytes) {
619 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
624 if(0 != fseeko(iterator->file, -((int)id_bytes), SEEK_CUR)) {
625 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
632 FLAC_API FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator)
634 FLAC__StreamMetadata *block = FLAC__metadata_object_new(iterator->type);
636 FLAC__ASSERT(0 != iterator);
637 FLAC__ASSERT(0 != iterator->file);
640 block->is_last = iterator->is_last;
641 block->length = iterator->length;
643 if(!read_metadata_block_data_(iterator, block)) {
644 FLAC__metadata_object_delete(block);
648 /* back up to the beginning of the block data to stay consistent */
649 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH, SEEK_SET)) {
650 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
651 FLAC__metadata_object_delete(block);
656 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
661 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
663 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth];)
666 FLAC__ASSERT(0 != iterator);
667 FLAC__ASSERT(0 != iterator->file);
668 FLAC__ASSERT(0 != block);
670 if(!iterator->is_writable) {
671 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
675 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO || block->type == FLAC__METADATA_TYPE_STREAMINFO) {
676 if(iterator->type != block->type) {
677 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
682 block->is_last = iterator->is_last;
684 if(iterator->length == block->length)
685 return write_metadata_block_stationary_(iterator, block);
686 else if(iterator->length > block->length) {
687 if(use_padding && iterator->length >= FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) {
688 ret = write_metadata_block_stationary_with_padding_(iterator, block, iterator->length - FLAC__STREAM_METADATA_HEADER_LENGTH - block->length, block->is_last);
689 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
690 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
694 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
695 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
696 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
700 else /* iterator->length < block->length */ {
701 unsigned padding_leftover = 0;
702 FLAC__bool padding_is_last = false;
704 /* first see if we can even use padding */
705 if(iterator->is_last) {
709 const unsigned extra_padding_bytes_required = block->length - iterator->length;
710 simple_iterator_push_(iterator);
711 if(!FLAC__metadata_simple_iterator_next(iterator)) {
712 (void)simple_iterator_pop_(iterator);
715 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
719 if(FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length == extra_padding_bytes_required) {
720 padding_leftover = 0;
721 block->is_last = iterator->is_last;
723 else if(iterator->length < extra_padding_bytes_required)
726 padding_leftover = FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length - extra_padding_bytes_required;
727 padding_is_last = iterator->is_last;
728 block->is_last = false;
731 if(!simple_iterator_pop_(iterator))
736 if(padding_leftover == 0) {
737 ret = write_metadata_block_stationary_(iterator, block);
738 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
739 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
743 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
744 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
745 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
746 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
751 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
752 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
753 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
759 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
761 unsigned padding_leftover = 0;
762 FLAC__bool padding_is_last = false;
764 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length;)
767 FLAC__ASSERT(0 != iterator);
768 FLAC__ASSERT(0 != iterator->file);
769 FLAC__ASSERT(0 != block);
771 if(!iterator->is_writable)
774 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
775 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
779 block->is_last = iterator->is_last;
782 /* first see if we can even use padding */
783 if(iterator->is_last) {
787 simple_iterator_push_(iterator);
788 if(!FLAC__metadata_simple_iterator_next(iterator)) {
789 (void)simple_iterator_pop_(iterator);
792 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
796 if(iterator->length == block->length) {
797 padding_leftover = 0;
798 block->is_last = iterator->is_last;
800 else if(iterator->length < FLAC__STREAM_METADATA_HEADER_LENGTH + block->length)
803 padding_leftover = iterator->length - block->length;
804 padding_is_last = iterator->is_last;
805 block->is_last = false;
808 if(!simple_iterator_pop_(iterator))
813 /* move to the next block, which is suitable padding */
814 if(!FLAC__metadata_simple_iterator_next(iterator))
816 if(padding_leftover == 0) {
817 ret = write_metadata_block_stationary_(iterator, block);
818 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
819 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
823 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
824 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
825 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
826 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
831 ret = rewrite_whole_file_(iterator, block, /*append=*/true);
832 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
833 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
838 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool use_padding)
840 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth];)
843 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO) {
844 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
849 FLAC__StreamMetadata *padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
851 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
854 padding->length = iterator->length;
855 if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false)) {
856 FLAC__metadata_object_delete(padding);
859 FLAC__metadata_object_delete(padding);
860 if(!FLAC__metadata_simple_iterator_prev(iterator))
862 FLAC__ASSERT(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length == debug_target_offset);
863 FLAC__ASSERT(ftello(iterator->file) + (off_t)iterator->length == debug_target_offset);
867 ret = rewrite_whole_file_(iterator, 0, /*append=*/false);
868 FLAC__ASSERT(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length == debug_target_offset);
869 FLAC__ASSERT(ftello(iterator->file) + (off_t)iterator->length == debug_target_offset);
876 /****************************************************************************
878 * Level 2 implementation
880 ***************************************************************************/
883 typedef struct FLAC__Metadata_Node {
884 FLAC__StreamMetadata *data;
885 struct FLAC__Metadata_Node *prev, *next;
886 } FLAC__Metadata_Node;
888 struct FLAC__Metadata_Chain {
889 char *filename; /* will be NULL if using callbacks */
891 FLAC__Metadata_Node *head;
892 FLAC__Metadata_Node *tail;
894 FLAC__Metadata_ChainStatus status;
895 off_t first_offset, last_offset;
897 * This is the length of the chain initially read from the FLAC file.
898 * it is used to compare against the current length to decide whether
899 * or not the whole file has to be rewritten.
901 off_t initial_length;
902 /* @@@ hacky, these are currently only needed by ogg reader */
903 FLAC__IOHandle handle;
904 FLAC__IOCallback_Read read_cb;
907 struct FLAC__Metadata_Iterator {
908 FLAC__Metadata_Chain *chain;
909 FLAC__Metadata_Node *current;
912 FLAC_API const char * const FLAC__Metadata_ChainStatusString[] = {
913 "FLAC__METADATA_CHAIN_STATUS_OK",
914 "FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT",
915 "FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE",
916 "FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE",
917 "FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE",
918 "FLAC__METADATA_CHAIN_STATUS_BAD_METADATA",
919 "FLAC__METADATA_CHAIN_STATUS_READ_ERROR",
920 "FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR",
921 "FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR",
922 "FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR",
923 "FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR",
924 "FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR",
925 "FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR",
926 "FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS",
927 "FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH",
928 "FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL"
932 static FLAC__Metadata_Node *node_new_(void)
934 return calloc(1, sizeof(FLAC__Metadata_Node));
937 static void node_delete_(FLAC__Metadata_Node *node)
939 FLAC__ASSERT(0 != node);
941 FLAC__metadata_object_delete(node->data);
945 static void chain_init_(FLAC__Metadata_Chain *chain)
947 FLAC__ASSERT(0 != chain);
950 chain->is_ogg = false;
951 chain->head = chain->tail = 0;
953 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
954 chain->initial_length = 0;
958 static void chain_clear_(FLAC__Metadata_Chain *chain)
960 FLAC__Metadata_Node *node, *next;
962 FLAC__ASSERT(0 != chain);
964 for(node = chain->head; node; ) {
970 if(0 != chain->filename)
971 free(chain->filename);
976 static void chain_append_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
978 FLAC__ASSERT(0 != chain);
979 FLAC__ASSERT(0 != node);
980 FLAC__ASSERT(0 != node->data);
982 node->next = node->prev = 0;
983 node->data->is_last = true;
985 chain->tail->data->is_last = false;
990 FLAC__ASSERT(0 != chain->tail);
991 chain->tail->next = node;
992 node->prev = chain->tail;
998 static void chain_remove_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1000 FLAC__ASSERT(0 != chain);
1001 FLAC__ASSERT(0 != node);
1003 if(node == chain->head)
1004 chain->head = node->next;
1006 node->prev->next = node->next;
1008 if(node == chain->tail)
1009 chain->tail = node->prev;
1011 node->next->prev = node->prev;
1013 if(0 != chain->tail)
1014 chain->tail->data->is_last = true;
1019 static void chain_delete_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1021 chain_remove_node_(chain, node);
1025 static off_t chain_calculate_length_(FLAC__Metadata_Chain *chain)
1027 const FLAC__Metadata_Node *node;
1029 for(node = chain->head; node; node = node->next)
1030 length += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1034 static void iterator_insert_node_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1036 FLAC__ASSERT(0 != node);
1037 FLAC__ASSERT(0 != node->data);
1038 FLAC__ASSERT(0 != iterator);
1039 FLAC__ASSERT(0 != iterator->current);
1040 FLAC__ASSERT(0 != iterator->chain);
1041 FLAC__ASSERT(0 != iterator->chain->head);
1042 FLAC__ASSERT(0 != iterator->chain->tail);
1044 node->data->is_last = false;
1046 node->prev = iterator->current->prev;
1047 node->next = iterator->current;
1050 iterator->chain->head = node;
1052 node->prev->next = node;
1054 iterator->current->prev = node;
1056 iterator->chain->nodes++;
1059 static void iterator_insert_node_after_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1061 FLAC__ASSERT(0 != node);
1062 FLAC__ASSERT(0 != node->data);
1063 FLAC__ASSERT(0 != iterator);
1064 FLAC__ASSERT(0 != iterator->current);
1065 FLAC__ASSERT(0 != iterator->chain);
1066 FLAC__ASSERT(0 != iterator->chain->head);
1067 FLAC__ASSERT(0 != iterator->chain->tail);
1069 iterator->current->data->is_last = false;
1071 node->prev = iterator->current;
1072 node->next = iterator->current->next;
1075 iterator->chain->tail = node;
1077 node->next->prev = node;
1079 node->prev->next = node;
1081 iterator->chain->tail->data->is_last = true;
1083 iterator->chain->nodes++;
1086 /* return true iff node and node->next are both padding */
1087 static FLAC__bool chain_merge_adjacent_padding_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1089 if(node->data->type == FLAC__METADATA_TYPE_PADDING && 0 != node->next && node->next->data->type == FLAC__METADATA_TYPE_PADDING) {
1090 const unsigned growth = FLAC__STREAM_METADATA_HEADER_LENGTH + node->next->data->length;
1091 node->data->length += growth;
1093 chain_delete_node_(chain, node->next);
1100 /* Returns the new length of the chain, or 0 if there was an error. */
1101 /* WATCHOUT: This can get called multiple times before a write, so
1102 * it should still work when this happens.
1104 /* WATCHOUT: Make sure to also update the logic in
1105 * FLAC__metadata_chain_check_if_tempfile_needed() if the logic here changes.
1107 static off_t chain_prepare_for_write_(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1109 off_t current_length = chain_calculate_length_(chain);
1112 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1113 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1114 const off_t delta = chain->initial_length - current_length;
1115 chain->tail->data->length += delta;
1116 current_length += delta;
1117 FLAC__ASSERT(current_length == chain->initial_length);
1119 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1120 else if(current_length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) {
1121 FLAC__StreamMetadata *padding;
1122 FLAC__Metadata_Node *node;
1123 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) {
1124 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1127 padding->length = chain->initial_length - (FLAC__STREAM_METADATA_HEADER_LENGTH + current_length);
1128 if(0 == (node = node_new_())) {
1129 FLAC__metadata_object_delete(padding);
1130 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1133 node->data = padding;
1134 chain_append_node_(chain, node);
1135 current_length = chain_calculate_length_(chain);
1136 FLAC__ASSERT(current_length == chain->initial_length);
1138 /* 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 */
1139 else if(current_length > chain->initial_length) {
1140 const off_t delta = current_length - chain->initial_length;
1141 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1142 /* if the delta is exactly the size of the last padding block, remove the padding block */
1143 if((off_t)chain->tail->data->length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta) {
1144 chain_delete_node_(chain, chain->tail);
1145 current_length = chain_calculate_length_(chain);
1146 FLAC__ASSERT(current_length == chain->initial_length);
1148 /* if there is at least 'delta' bytes of padding, trim the padding down */
1149 else if((off_t)chain->tail->data->length >= delta) {
1150 chain->tail->data->length -= delta;
1151 current_length -= delta;
1152 FLAC__ASSERT(current_length == chain->initial_length);
1158 return current_length;
1161 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)
1163 FLAC__Metadata_Node *node;
1165 FLAC__ASSERT(0 != chain);
1167 /* we assume we're already at the beginning of the file */
1169 switch(seek_to_first_metadata_block_cb_(handle, read_cb, seek_cb)) {
1173 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1176 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1179 chain->status = FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
1187 FLAC__int64 pos = tell_cb(handle);
1189 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1192 chain->first_offset = (off_t)pos;
1197 FLAC__MetadataType type;
1203 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1207 if(!read_metadata_block_header_cb_(handle, read_cb, &is_last, &type, &length)) {
1209 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1213 node->data = FLAC__metadata_object_new(type);
1214 if(0 == node->data) {
1216 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1220 node->data->is_last = is_last;
1221 node->data->length = length;
1223 chain->status = get_equivalent_status_(read_metadata_block_data_cb_(handle, read_cb, seek_cb, node->data));
1224 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1228 chain_append_node_(chain, node);
1233 FLAC__int64 pos = tell_cb(handle);
1235 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1238 chain->last_offset = (off_t)pos;
1241 chain->initial_length = chain_calculate_length_(chain);
1246 static FLAC__StreamDecoderReadStatus chain_read_ogg_read_cb_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
1248 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1250 if(*bytes > 0 && chain->status == FLAC__METADATA_CHAIN_STATUS_OK) {
1251 *bytes = chain->read_cb(buffer, sizeof(FLAC__byte), *bytes, chain->handle);
1253 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
1255 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
1258 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
1261 static FLAC__StreamDecoderWriteStatus chain_read_ogg_write_cb_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
1263 (void)decoder, (void)frame, (void)buffer, (void)client_data;
1264 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1267 static void chain_read_ogg_metadata_cb_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
1269 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1270 FLAC__Metadata_Node *node;
1276 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1280 node->data = FLAC__metadata_object_clone(metadata);
1281 if(0 == node->data) {
1283 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1287 chain_append_node_(chain, node);
1290 static void chain_read_ogg_error_cb_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1292 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1293 (void)decoder, (void)status;
1294 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1297 static FLAC__bool chain_read_ogg_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb)
1299 FLAC__StreamDecoder *decoder;
1301 FLAC__ASSERT(0 != chain);
1303 /* we assume we're already at the beginning of the file */
1305 chain->handle = handle;
1306 chain->read_cb = read_cb;
1307 if(0 == (decoder = FLAC__stream_decoder_new())) {
1308 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1311 FLAC__stream_decoder_set_metadata_respond_all(decoder);
1312 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) {
1313 FLAC__stream_decoder_delete(decoder);
1314 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1318 chain->first_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1320 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder))
1321 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1322 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1323 FLAC__stream_decoder_delete(decoder);
1327 FLAC__stream_decoder_delete(decoder);
1329 chain->last_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1331 chain->initial_length = chain_calculate_length_(chain);
1336 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)
1338 FLAC__Metadata_Node *node;
1340 FLAC__ASSERT(0 != chain);
1341 FLAC__ASSERT(0 != chain->head);
1343 if(0 != seek_cb(handle, chain->first_offset, SEEK_SET)) {
1344 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1348 for(node = chain->head; node; node = node->next) {
1349 if(!write_metadata_block_header_cb_(handle, write_cb, node->data)) {
1350 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1353 if(!write_metadata_block_data_cb_(handle, write_cb, node->data)) {
1354 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1359 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1361 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1365 static FLAC__bool chain_rewrite_metadata_in_place_(FLAC__Metadata_Chain *chain)
1370 FLAC__ASSERT(0 != chain->filename);
1372 if(0 == (file = fopen(chain->filename, "r+b"))) {
1373 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1377 /* chain_rewrite_metadata_in_place_cb_() sets chain->status for us */
1378 ret = chain_rewrite_metadata_in_place_cb_(chain, (FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, fseek_wrapper_);
1385 static FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix)
1389 FLAC__Metadata_SimpleIteratorStatus status;
1390 const FLAC__Metadata_Node *node;
1392 FLAC__ASSERT(0 != chain);
1393 FLAC__ASSERT(0 != chain->filename);
1394 FLAC__ASSERT(0 != chain->head);
1396 /* copy the file prefix (data up to first metadata block */
1397 if(0 == (f = fopen(chain->filename, "rb"))) {
1398 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1401 if(!open_tempfile_(chain->filename, tempfile_path_prefix, &tempfile, &tempfilename, &status)) {
1402 chain->status = get_equivalent_status_(status);
1405 if(!copy_n_bytes_from_file_(f, tempfile, chain->first_offset, &status)) {
1406 chain->status = get_equivalent_status_(status);
1410 /* write the metadata */
1411 for(node = chain->head; node; node = node->next) {
1412 if(!write_metadata_block_header_(tempfile, &status, node->data)) {
1413 chain->status = get_equivalent_status_(status);
1416 if(!write_metadata_block_data_(tempfile, &status, node->data)) {
1417 chain->status = get_equivalent_status_(status);
1421 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1423 /* copy the file postfix (everything after the metadata) */
1424 if(0 != fseeko(f, chain->last_offset, SEEK_SET)) {
1425 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1428 if(!copy_remaining_bytes_from_file_(f, tempfile, &status)) {
1429 chain->status = get_equivalent_status_(status);
1433 /* move the tempfile on top of the original */
1435 if(!transport_tempfile_(chain->filename, &tempfile, &tempfilename, &status))
1442 cleanup_tempfile_(&tempfile, &tempfilename);
1446 /* assumes 'handle' is already at beginning of file */
1447 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)
1449 FLAC__Metadata_SimpleIteratorStatus status;
1450 const FLAC__Metadata_Node *node;
1452 FLAC__ASSERT(0 != chain);
1453 FLAC__ASSERT(0 == chain->filename);
1454 FLAC__ASSERT(0 != chain->head);
1456 /* copy the file prefix (data up to first metadata block */
1457 if(!copy_n_bytes_from_file_cb_(handle, read_cb, temp_handle, temp_write_cb, chain->first_offset, &status)) {
1458 chain->status = get_equivalent_status_(status);
1462 /* write the metadata */
1463 for(node = chain->head; node; node = node->next) {
1464 if(!write_metadata_block_header_cb_(temp_handle, temp_write_cb, node->data)) {
1465 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1468 if(!write_metadata_block_data_cb_(temp_handle, temp_write_cb, node->data)) {
1469 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1473 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1475 /* copy the file postfix (everything after the metadata) */
1476 if(0 != seek_cb(handle, chain->last_offset, SEEK_SET)) {
1477 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1480 if(!copy_remaining_bytes_from_file_cb_(handle, read_cb, eof_cb, temp_handle, temp_write_cb, &status)) {
1481 chain->status = get_equivalent_status_(status);
1488 FLAC_API FLAC__Metadata_Chain *FLAC__metadata_chain_new(void)
1490 FLAC__Metadata_Chain *chain = calloc(1, sizeof(FLAC__Metadata_Chain));
1498 FLAC_API void FLAC__metadata_chain_delete(FLAC__Metadata_Chain *chain)
1500 FLAC__ASSERT(0 != chain);
1502 chain_clear_(chain);
1507 FLAC_API FLAC__Metadata_ChainStatus FLAC__metadata_chain_status(FLAC__Metadata_Chain *chain)
1509 FLAC__Metadata_ChainStatus status;
1511 FLAC__ASSERT(0 != chain);
1513 status = chain->status;
1514 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1518 static FLAC__bool chain_read_(FLAC__Metadata_Chain *chain, const char *filename, FLAC__bool is_ogg)
1523 FLAC__ASSERT(0 != chain);
1524 FLAC__ASSERT(0 != filename);
1526 chain_clear_(chain);
1528 if(0 == (chain->filename = strdup(filename))) {
1529 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1533 chain->is_ogg = is_ogg;
1535 if(0 == (file = fopen(filename, "rb"))) {
1536 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1540 /* the function also sets chain->status for us */
1542 chain_read_ogg_cb_(chain, file, (FLAC__IOCallback_Read)fread) :
1543 chain_read_cb_(chain, file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, ftell_wrapper_)
1551 FLAC_API FLAC__bool FLAC__metadata_chain_read(FLAC__Metadata_Chain *chain, const char *filename)
1553 return chain_read_(chain, filename, /*is_ogg=*/false);
1556 /*@@@@add to tests*/
1557 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg(FLAC__Metadata_Chain *chain, const char *filename)
1559 return chain_read_(chain, filename, /*is_ogg=*/true);
1562 static FLAC__bool chain_read_with_callbacks_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks, FLAC__bool is_ogg)
1566 FLAC__ASSERT(0 != chain);
1568 chain_clear_(chain);
1570 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.tell) {
1571 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1575 chain->is_ogg = is_ogg;
1578 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1579 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1583 /* the function also sets chain->status for us */
1585 chain_read_ogg_cb_(chain, handle, callbacks.read) :
1586 chain_read_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.tell)
1592 FLAC_API FLAC__bool FLAC__metadata_chain_read_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1594 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/false);
1597 /*@@@@add to tests*/
1598 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1600 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/true);
1603 FLAC_API FLAC__bool FLAC__metadata_chain_check_if_tempfile_needed(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1605 /* This does all the same checks that are in chain_prepare_for_write_()
1606 * but doesn't actually alter the chain. Make sure to update the logic
1607 * here if chain_prepare_for_write_() changes.
1609 const off_t current_length = chain_calculate_length_(chain);
1611 FLAC__ASSERT(0 != chain);
1614 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1615 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING)
1617 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1618 else if(current_length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length)
1620 /* 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 */
1621 else if(current_length > chain->initial_length) {
1622 const off_t delta = current_length - chain->initial_length;
1623 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1624 /* if the delta is exactly the size of the last padding block, remove the padding block */
1625 if((off_t)chain->tail->data->length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta)
1627 /* if there is at least 'delta' bytes of padding, trim the padding down */
1628 else if((off_t)chain->tail->data->length >= delta)
1634 return (current_length != chain->initial_length);
1637 FLAC_API FLAC__bool FLAC__metadata_chain_write(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats)
1640 const char *tempfile_path_prefix = 0;
1641 off_t current_length;
1643 FLAC__ASSERT(0 != chain);
1645 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1646 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1650 if (0 == chain->filename) {
1651 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1655 current_length = chain_prepare_for_write_(chain, use_padding);
1657 /* a return value of 0 means there was an error; chain->status is already set */
1658 if (0 == current_length)
1661 if(preserve_file_stats)
1662 get_file_stats_(chain->filename, &stats);
1664 if(current_length == chain->initial_length) {
1665 if(!chain_rewrite_metadata_in_place_(chain))
1669 if(!chain_rewrite_file_(chain, tempfile_path_prefix))
1672 /* recompute lengths and offsets */
1674 const FLAC__Metadata_Node *node;
1675 chain->initial_length = current_length;
1676 chain->last_offset = chain->first_offset;
1677 for(node = chain->head; node; node = node->next)
1678 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1682 if(preserve_file_stats)
1683 set_file_stats_(chain->filename, &stats);
1688 FLAC_API FLAC__bool FLAC__metadata_chain_write_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1690 off_t current_length;
1692 FLAC__ASSERT(0 != chain);
1694 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1695 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1699 if (0 != chain->filename) {
1700 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1704 if (0 == callbacks.write || 0 == callbacks.seek) {
1705 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1709 if (FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1710 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1714 current_length = chain_prepare_for_write_(chain, use_padding);
1716 /* a return value of 0 means there was an error; chain->status is already set */
1717 if (0 == current_length)
1720 FLAC__ASSERT(current_length == chain->initial_length);
1722 return chain_rewrite_metadata_in_place_cb_(chain, handle, callbacks.write, callbacks.seek);
1725 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)
1727 off_t current_length;
1729 FLAC__ASSERT(0 != chain);
1731 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1732 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1736 if (0 != chain->filename) {
1737 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1741 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.eof) {
1742 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1745 if (0 == temp_callbacks.write) {
1746 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1750 if (!FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1751 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1755 current_length = chain_prepare_for_write_(chain, use_padding);
1757 /* a return value of 0 means there was an error; chain->status is already set */
1758 if (0 == current_length)
1761 FLAC__ASSERT(current_length != chain->initial_length);
1764 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1765 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1769 if(!chain_rewrite_file_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.eof, temp_handle, temp_callbacks.write))
1772 /* recompute lengths and offsets */
1774 const FLAC__Metadata_Node *node;
1775 chain->initial_length = current_length;
1776 chain->last_offset = chain->first_offset;
1777 for(node = chain->head; node; node = node->next)
1778 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1784 FLAC_API void FLAC__metadata_chain_merge_padding(FLAC__Metadata_Chain *chain)
1786 FLAC__Metadata_Node *node;
1788 FLAC__ASSERT(0 != chain);
1790 for(node = chain->head; node; ) {
1791 if(!chain_merge_adjacent_padding_(chain, node))
1796 FLAC_API void FLAC__metadata_chain_sort_padding(FLAC__Metadata_Chain *chain)
1798 FLAC__Metadata_Node *node, *save;
1801 FLAC__ASSERT(0 != chain);
1804 * Don't try and be too smart... this simple algo is good enough for
1805 * the small number of nodes that we deal with.
1807 for(i = 0, node = chain->head; i < chain->nodes; i++) {
1808 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1810 chain_remove_node_(chain, node);
1811 chain_append_node_(chain, node);
1819 FLAC__metadata_chain_merge_padding(chain);
1823 FLAC_API FLAC__Metadata_Iterator *FLAC__metadata_iterator_new(void)
1825 FLAC__Metadata_Iterator *iterator = calloc(1, sizeof(FLAC__Metadata_Iterator));
1827 /* calloc() implies:
1828 iterator->current = 0;
1829 iterator->chain = 0;
1835 FLAC_API void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator)
1837 FLAC__ASSERT(0 != iterator);
1842 FLAC_API void FLAC__metadata_iterator_init(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Chain *chain)
1844 FLAC__ASSERT(0 != iterator);
1845 FLAC__ASSERT(0 != chain);
1846 FLAC__ASSERT(0 != chain->head);
1848 iterator->chain = chain;
1849 iterator->current = chain->head;
1852 FLAC_API FLAC__bool FLAC__metadata_iterator_next(FLAC__Metadata_Iterator *iterator)
1854 FLAC__ASSERT(0 != iterator);
1856 if(0 == iterator->current || 0 == iterator->current->next)
1859 iterator->current = iterator->current->next;
1863 FLAC_API FLAC__bool FLAC__metadata_iterator_prev(FLAC__Metadata_Iterator *iterator)
1865 FLAC__ASSERT(0 != iterator);
1867 if(0 == iterator->current || 0 == iterator->current->prev)
1870 iterator->current = iterator->current->prev;
1874 FLAC_API FLAC__MetadataType FLAC__metadata_iterator_get_block_type(const FLAC__Metadata_Iterator *iterator)
1876 FLAC__ASSERT(0 != iterator);
1877 FLAC__ASSERT(0 != iterator->current);
1878 FLAC__ASSERT(0 != iterator->current->data);
1880 return iterator->current->data->type;
1883 FLAC_API FLAC__StreamMetadata *FLAC__metadata_iterator_get_block(FLAC__Metadata_Iterator *iterator)
1885 FLAC__ASSERT(0 != iterator);
1886 FLAC__ASSERT(0 != iterator->current);
1888 return iterator->current->data;
1891 FLAC_API FLAC__bool FLAC__metadata_iterator_set_block(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1893 FLAC__ASSERT(0 != iterator);
1894 FLAC__ASSERT(0 != block);
1895 return FLAC__metadata_iterator_delete_block(iterator, false) && FLAC__metadata_iterator_insert_block_after(iterator, block);
1898 FLAC_API FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__Metadata_Iterator *iterator, FLAC__bool replace_with_padding)
1900 FLAC__Metadata_Node *save;
1902 FLAC__ASSERT(0 != iterator);
1903 FLAC__ASSERT(0 != iterator->current);
1905 if(0 == iterator->current->prev) {
1906 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1910 save = iterator->current->prev;
1912 if(replace_with_padding) {
1913 FLAC__metadata_object_delete_data(iterator->current->data);
1914 iterator->current->data->type = FLAC__METADATA_TYPE_PADDING;
1917 chain_delete_node_(iterator->chain, iterator->current);
1920 iterator->current = save;
1924 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1926 FLAC__Metadata_Node *node;
1928 FLAC__ASSERT(0 != iterator);
1929 FLAC__ASSERT(0 != iterator->current);
1930 FLAC__ASSERT(0 != block);
1932 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1935 if(0 == iterator->current->prev) {
1936 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1940 if(0 == (node = node_new_()))
1944 iterator_insert_node_(iterator, node);
1945 iterator->current = node;
1949 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1951 FLAC__Metadata_Node *node;
1953 FLAC__ASSERT(0 != iterator);
1954 FLAC__ASSERT(0 != iterator->current);
1955 FLAC__ASSERT(0 != block);
1957 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1960 if(0 == (node = node_new_()))
1964 iterator_insert_node_after_(iterator, node);
1965 iterator->current = node;
1970 /****************************************************************************
1972 * Local function definitions
1974 ***************************************************************************/
1976 void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1982 for(i = 0; i < bytes; i++) {
1983 *(--b) = (FLAC__byte)(val & 0xff);
1988 void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1992 for(i = 0; i < bytes; i++) {
1993 *(b++) = (FLAC__byte)(val & 0xff);
1998 void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes)
2004 for(i = 0; i < bytes; i++) {
2005 *(--b) = (FLAC__byte)(val & 0xff);
2010 FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes)
2012 FLAC__uint32 ret = 0;
2015 for(i = 0; i < bytes; i++)
2016 ret = (ret << 8) | (FLAC__uint32)(*b++);
2021 FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes)
2023 FLAC__uint32 ret = 0;
2028 for(i = 0; i < bytes; i++)
2029 ret = (ret << 8) | (FLAC__uint32)(*--b);
2034 FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes)
2036 FLAC__uint64 ret = 0;
2039 for(i = 0; i < bytes; i++)
2040 ret = (ret << 8) | (FLAC__uint64)(*b++);
2045 FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator)
2047 FLAC__ASSERT(0 != iterator);
2048 FLAC__ASSERT(0 != iterator->file);
2050 if(!read_metadata_block_header_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, &iterator->is_last, &iterator->type, &iterator->length)) {
2051 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2058 FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block)
2060 FLAC__ASSERT(0 != iterator);
2061 FLAC__ASSERT(0 != iterator->file);
2063 iterator->status = read_metadata_block_data_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, block);
2065 return (iterator->status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK);
2068 FLAC__bool read_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__bool *is_last, FLAC__MetadataType *type, unsigned *length)
2070 FLAC__byte raw_header[FLAC__STREAM_METADATA_HEADER_LENGTH];
2072 if(read_cb(raw_header, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2075 *is_last = raw_header[0] & 0x80? true : false;
2076 *type = (FLAC__MetadataType)(raw_header[0] & 0x7f);
2077 *length = unpack_uint32_(raw_header + 1, 3);
2079 /* Note that we don't check:
2080 * if(iterator->type >= FLAC__METADATA_TYPE_UNDEFINED)
2081 * we just will read in an opaque block
2087 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata *block)
2089 switch(block->type) {
2090 case FLAC__METADATA_TYPE_STREAMINFO:
2091 return read_metadata_block_data_streaminfo_cb_(handle, read_cb, &block->data.stream_info);
2092 case FLAC__METADATA_TYPE_PADDING:
2093 return read_metadata_block_data_padding_cb_(handle, seek_cb, &block->data.padding, block->length);
2094 case FLAC__METADATA_TYPE_APPLICATION:
2095 return read_metadata_block_data_application_cb_(handle, read_cb, &block->data.application, block->length);
2096 case FLAC__METADATA_TYPE_SEEKTABLE:
2097 return read_metadata_block_data_seektable_cb_(handle, read_cb, &block->data.seek_table, block->length);
2098 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2099 return read_metadata_block_data_vorbis_comment_cb_(handle, read_cb, &block->data.vorbis_comment);
2100 case FLAC__METADATA_TYPE_CUESHEET:
2101 return read_metadata_block_data_cuesheet_cb_(handle, read_cb, &block->data.cue_sheet);
2102 case FLAC__METADATA_TYPE_PICTURE:
2103 return read_metadata_block_data_picture_cb_(handle, read_cb, &block->data.picture);
2105 return read_metadata_block_data_unknown_cb_(handle, read_cb, &block->data.unknown, block->length);
2109 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block)
2111 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH], *b;
2113 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2114 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2118 /* we are using hardcoded numbers for simplicity but we should
2119 * probably eventually write a bit-level unpacker and use the
2120 * _STREAMINFO_ constants.
2122 block->min_blocksize = unpack_uint32_(b, 2); b += 2;
2123 block->max_blocksize = unpack_uint32_(b, 2); b += 2;
2124 block->min_framesize = unpack_uint32_(b, 3); b += 3;
2125 block->max_framesize = unpack_uint32_(b, 3); b += 3;
2126 block->sample_rate = (unpack_uint32_(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4);
2127 block->channels = (unsigned)((b[2] & 0x0e) >> 1) + 1;
2128 block->bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 4) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1;
2129 block->total_samples = (((FLAC__uint64)(b[3] & 0x0f)) << 32) | unpack_uint64_(b+4, 4);
2130 memcpy(block->md5sum, b+8, 16);
2132 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2135 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_Padding *block, unsigned block_length)
2137 (void)block; /* nothing to do; we don't care about reading the padding bytes */
2139 if(0 != seek_cb(handle, block_length, SEEK_CUR))
2140 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2142 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2145 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Application *block, unsigned block_length)
2147 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2149 if(read_cb(block->id, 1, id_bytes, handle) != id_bytes)
2150 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2152 if(block_length < id_bytes)
2153 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2155 block_length -= id_bytes;
2157 if(block_length == 0) {
2161 if(0 == (block->data = malloc(block_length)))
2162 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2164 if(read_cb(block->data, 1, block_length, handle) != block_length)
2165 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2168 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2171 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_SeekTable *block, unsigned block_length)
2174 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2176 FLAC__ASSERT(block_length % FLAC__STREAM_METADATA_SEEKPOINT_LENGTH == 0);
2178 block->num_points = block_length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
2180 if(block->num_points == 0)
2182 else if(0 == (block->points = safe_malloc_mul_2op_(block->num_points, /*times*/sizeof(FLAC__StreamMetadata_SeekPoint))))
2183 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2185 for(i = 0; i < block->num_points; i++) {
2186 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2187 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2188 /* some MAGIC NUMBERs here */
2189 block->points[i].sample_number = unpack_uint64_(buffer, 8);
2190 block->points[i].stream_offset = unpack_uint64_(buffer+8, 8);
2191 block->points[i].frame_samples = unpack_uint32_(buffer+16, 2);
2194 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2197 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment_Entry *entry)
2199 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2200 FLAC__byte buffer[4]; /* magic number is asserted below */
2202 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8 == sizeof(buffer));
2204 if(read_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2205 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2206 entry->length = unpack_uint32_little_endian_(buffer, entry_length_len);
2208 if(0 != entry->entry)
2211 if(entry->length == 0) {
2215 if(0 == (entry->entry = safe_malloc_add_2op_(entry->length, /*+*/1)))
2216 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2218 if(read_cb(entry->entry, 1, entry->length, handle) != entry->length)
2219 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2221 entry->entry[entry->length] = '\0';
2224 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2227 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment *block)
2230 FLAC__Metadata_SimpleIteratorStatus status;
2231 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2232 FLAC__byte buffer[4]; /* magic number is asserted below */
2234 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8 == sizeof(buffer));
2236 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, &(block->vendor_string))))
2239 if(read_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2240 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2241 block->num_comments = unpack_uint32_little_endian_(buffer, num_comments_len);
2243 if(block->num_comments == 0) {
2244 block->comments = 0;
2246 else if(0 == (block->comments = calloc(block->num_comments, sizeof(FLAC__StreamMetadata_VorbisComment_Entry))))
2247 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2249 for(i = 0; i < block->num_comments; i++) {
2250 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, block->comments + i)))
2254 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2257 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track)
2260 FLAC__byte buffer[32]; /* asserted below that this is big enough */
2262 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2263 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2264 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);
2266 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2267 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2268 if(read_cb(buffer, 1, len, handle) != len)
2269 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2270 track->offset = unpack_uint64_(buffer, len);
2272 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2273 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2274 if(read_cb(buffer, 1, len, handle) != len)
2275 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2276 track->number = (FLAC__byte)unpack_uint32_(buffer, len);
2278 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2279 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2280 if(read_cb(track->isrc, 1, len, handle) != len)
2281 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2283 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);
2284 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2285 if(read_cb(buffer, 1, len, handle) != len)
2286 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2287 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN == 1);
2288 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN == 1);
2289 track->type = buffer[0] >> 7;
2290 track->pre_emphasis = (buffer[0] >> 6) & 1;
2292 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2293 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2294 if(read_cb(buffer, 1, len, handle) != len)
2295 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2296 track->num_indices = (FLAC__byte)unpack_uint32_(buffer, len);
2298 if(track->num_indices == 0) {
2301 else if(0 == (track->indices = calloc(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index))))
2302 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2304 for(i = 0; i < track->num_indices; i++) {
2305 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2306 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2307 if(read_cb(buffer, 1, len, handle) != len)
2308 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2309 track->indices[i].offset = unpack_uint64_(buffer, len);
2311 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2312 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2313 if(read_cb(buffer, 1, len, handle) != len)
2314 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2315 track->indices[i].number = (FLAC__byte)unpack_uint32_(buffer, len);
2317 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2318 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2319 if(read_cb(buffer, 1, len, handle) != len)
2320 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2323 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2326 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block)
2329 FLAC__Metadata_SimpleIteratorStatus status;
2330 FLAC__byte buffer[1024]; /* MSVC needs a constant expression so we put a magic number and assert */
2332 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN)/8 <= sizeof(buffer));
2333 FLAC__ASSERT(sizeof(FLAC__uint64) <= sizeof(buffer));
2335 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2336 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2337 if(read_cb(block->media_catalog_number, 1, len, handle) != len)
2338 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2340 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2341 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2342 if(read_cb(buffer, 1, len, handle) != len)
2343 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2344 block->lead_in = unpack_uint64_(buffer, len);
2346 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2347 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2348 if(read_cb(buffer, 1, len, handle) != len)
2349 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2350 block->is_cd = buffer[0]&0x80? true : false;
2352 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2353 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2354 if(read_cb(buffer, 1, len, handle) != len)
2355 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2356 block->num_tracks = unpack_uint32_(buffer, len);
2358 if(block->num_tracks == 0) {
2361 else if(0 == (block->tracks = calloc(block->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track))))
2362 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2364 for(i = 0; i < block->num_tracks; i++) {
2365 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_cuesheet_track_cb_(handle, read_cb, block->tracks + i)))
2369 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2372 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)
2374 FLAC__byte buffer[sizeof(FLAC__uint32)];
2376 FLAC__ASSERT(0 != data);
2377 FLAC__ASSERT(length_len%8 == 0);
2379 length_len /= 8; /* convert to bytes */
2381 FLAC__ASSERT(sizeof(buffer) >= length_len);
2383 if(read_cb(buffer, 1, length_len, handle) != length_len)
2384 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2385 *length = unpack_uint32_(buffer, length_len);
2390 if(0 == (*data = safe_malloc_add_2op_(*length, /*+*/1)))
2391 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2394 if(read_cb(*data, 1, *length, handle) != *length)
2395 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2398 (*data)[*length] = '\0';
2400 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2403 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block)
2405 FLAC__Metadata_SimpleIteratorStatus status;
2406 FLAC__byte buffer[4]; /* asserted below that this is big enough */
2409 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2410 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2411 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2412 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2413 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2415 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_TYPE_LEN % 8 == 0);
2416 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN / 8;
2417 if(read_cb(buffer, 1, len, handle) != len)
2418 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2419 block->type = (FLAC__StreamMetadata_Picture_Type)unpack_uint32_(buffer, len);
2421 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)
2424 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)
2427 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN % 8 == 0);
2428 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN / 8;
2429 if(read_cb(buffer, 1, len, handle) != len)
2430 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2431 block->width = unpack_uint32_(buffer, len);
2433 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN % 8 == 0);
2434 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN / 8;
2435 if(read_cb(buffer, 1, len, handle) != len)
2436 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2437 block->height = unpack_uint32_(buffer, len);
2439 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN % 8 == 0);
2440 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN / 8;
2441 if(read_cb(buffer, 1, len, handle) != len)
2442 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2443 block->depth = unpack_uint32_(buffer, len);
2445 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_COLORS_LEN % 8 == 0);
2446 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN / 8;
2447 if(read_cb(buffer, 1, len, handle) != len)
2448 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2449 block->colors = unpack_uint32_(buffer, len);
2451 /* for convenience we use read_metadata_block_data_picture_cstring_cb_() even though it adds an extra terminating NUL we don't use */
2452 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)
2455 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2458 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2460 if(block_length == 0) {
2464 if(0 == (block->data = malloc(block_length)))
2465 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2467 if(read_cb(block->data, 1, block_length, handle) != block_length)
2468 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2471 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2474 FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2476 FLAC__ASSERT(0 != file);
2477 FLAC__ASSERT(0 != status);
2479 if(!write_metadata_block_header_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2480 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2487 FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2489 FLAC__ASSERT(0 != file);
2490 FLAC__ASSERT(0 != status);
2492 if (write_metadata_block_data_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2493 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2497 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2502 FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2504 FLAC__byte buffer[FLAC__STREAM_METADATA_HEADER_LENGTH];
2506 FLAC__ASSERT(block->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
2508 buffer[0] = (block->is_last? 0x80 : 0) | (FLAC__byte)block->type;
2509 pack_uint32_(block->length, buffer + 1, 3);
2511 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2517 FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2519 FLAC__ASSERT(0 != block);
2521 switch(block->type) {
2522 case FLAC__METADATA_TYPE_STREAMINFO:
2523 return write_metadata_block_data_streaminfo_cb_(handle, write_cb, &block->data.stream_info);
2524 case FLAC__METADATA_TYPE_PADDING:
2525 return write_metadata_block_data_padding_cb_(handle, write_cb, &block->data.padding, block->length);
2526 case FLAC__METADATA_TYPE_APPLICATION:
2527 return write_metadata_block_data_application_cb_(handle, write_cb, &block->data.application, block->length);
2528 case FLAC__METADATA_TYPE_SEEKTABLE:
2529 return write_metadata_block_data_seektable_cb_(handle, write_cb, &block->data.seek_table);
2530 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2531 return write_metadata_block_data_vorbis_comment_cb_(handle, write_cb, &block->data.vorbis_comment);
2532 case FLAC__METADATA_TYPE_CUESHEET:
2533 return write_metadata_block_data_cuesheet_cb_(handle, write_cb, &block->data.cue_sheet);
2534 case FLAC__METADATA_TYPE_PICTURE:
2535 return write_metadata_block_data_picture_cb_(handle, write_cb, &block->data.picture);
2537 return write_metadata_block_data_unknown_cb_(handle, write_cb, &block->data.unknown, block->length);
2541 FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block)
2543 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH];
2544 const unsigned channels1 = block->channels - 1;
2545 const unsigned bps1 = block->bits_per_sample - 1;
2547 /* we are using hardcoded numbers for simplicity but we should
2548 * probably eventually write a bit-level packer and use the
2549 * _STREAMINFO_ constants.
2551 pack_uint32_(block->min_blocksize, buffer, 2);
2552 pack_uint32_(block->max_blocksize, buffer+2, 2);
2553 pack_uint32_(block->min_framesize, buffer+4, 3);
2554 pack_uint32_(block->max_framesize, buffer+7, 3);
2555 buffer[10] = (block->sample_rate >> 12) & 0xff;
2556 buffer[11] = (block->sample_rate >> 4) & 0xff;
2557 buffer[12] = ((block->sample_rate & 0x0f) << 4) | (channels1 << 1) | (bps1 >> 4);
2558 buffer[13] = (FLAC__byte)(((bps1 & 0x0f) << 4) | ((block->total_samples >> 32) & 0x0f));
2559 pack_uint32_((FLAC__uint32)block->total_samples, buffer+14, 4);
2560 memcpy(buffer+18, block->md5sum, 16);
2562 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2568 FLAC__bool write_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Padding *block, unsigned block_length)
2570 unsigned i, n = block_length;
2571 FLAC__byte buffer[1024];
2575 memset(buffer, 0, 1024);
2577 for(i = 0; i < n/1024; i++)
2578 if(write_cb(buffer, 1, 1024, handle) != 1024)
2583 if(write_cb(buffer, 1, n, handle) != n)
2589 FLAC__bool write_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Application *block, unsigned block_length)
2591 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2593 if(write_cb(block->id, 1, id_bytes, handle) != id_bytes)
2596 block_length -= id_bytes;
2598 if(write_cb(block->data, 1, block_length, handle) != block_length)
2604 FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block)
2607 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2609 for(i = 0; i < block->num_points; i++) {
2610 /* some MAGIC NUMBERs here */
2611 pack_uint64_(block->points[i].sample_number, buffer, 8);
2612 pack_uint64_(block->points[i].stream_offset, buffer+8, 8);
2613 pack_uint32_(block->points[i].frame_samples, buffer+16, 2);
2614 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2621 FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block)
2624 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2625 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2626 FLAC__byte buffer[4]; /* magic number is asserted below */
2628 FLAC__ASSERT(flac_max(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN, FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8 == sizeof(buffer));
2630 pack_uint32_little_endian_(block->vendor_string.length, buffer, entry_length_len);
2631 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2633 if(write_cb(block->vendor_string.entry, 1, block->vendor_string.length, handle) != block->vendor_string.length)
2636 pack_uint32_little_endian_(block->num_comments, buffer, num_comments_len);
2637 if(write_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2640 for(i = 0; i < block->num_comments; i++) {
2641 pack_uint32_little_endian_(block->comments[i].length, buffer, entry_length_len);
2642 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2644 if(write_cb(block->comments[i].entry, 1, block->comments[i].length, handle) != block->comments[i].length)
2651 FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block)
2654 FLAC__byte buffer[1024]; /* asserted below that this is big enough */
2656 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2657 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN/8);
2658 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);
2659 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2661 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2662 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2663 if(write_cb(block->media_catalog_number, 1, len, handle) != len)
2666 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2667 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2668 pack_uint64_(block->lead_in, buffer, len);
2669 if(write_cb(buffer, 1, len, handle) != len)
2672 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2673 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2674 memset(buffer, 0, len);
2677 if(write_cb(buffer, 1, len, handle) != len)
2680 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2681 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2682 pack_uint32_(block->num_tracks, buffer, len);
2683 if(write_cb(buffer, 1, len, handle) != len)
2686 for(i = 0; i < block->num_tracks; i++) {
2687 FLAC__StreamMetadata_CueSheet_Track *track = block->tracks + i;
2689 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2690 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2691 pack_uint64_(track->offset, buffer, len);
2692 if(write_cb(buffer, 1, len, handle) != len)
2695 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2696 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2697 pack_uint32_(track->number, buffer, len);
2698 if(write_cb(buffer, 1, len, handle) != len)
2701 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2702 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2703 if(write_cb(track->isrc, 1, len, handle) != len)
2706 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);
2707 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2708 memset(buffer, 0, len);
2709 buffer[0] = (track->type << 7) | (track->pre_emphasis << 6);
2710 if(write_cb(buffer, 1, len, handle) != len)
2713 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2714 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2715 pack_uint32_(track->num_indices, buffer, len);
2716 if(write_cb(buffer, 1, len, handle) != len)
2719 for(j = 0; j < track->num_indices; j++) {
2720 FLAC__StreamMetadata_CueSheet_Index *index = track->indices + j;
2722 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2723 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2724 pack_uint64_(index->offset, buffer, len);
2725 if(write_cb(buffer, 1, len, handle) != len)
2728 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2729 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2730 pack_uint32_(index->number, buffer, len);
2731 if(write_cb(buffer, 1, len, handle) != len)
2734 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2735 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2736 memset(buffer, 0, len);
2737 if(write_cb(buffer, 1, len, handle) != len)
2745 FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block)
2749 FLAC__byte buffer[4]; /* magic number is asserted below */
2751 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_TYPE_LEN%8);
2752 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN%8);
2753 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN%8);
2754 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN%8);
2755 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN%8);
2756 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN%8);
2757 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_COLORS_LEN%8);
2758 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN%8);
2759 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2760 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8);
2761 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8);
2762 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2763 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2764 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2765 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2766 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8);
2768 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8;
2769 pack_uint32_(block->type, buffer, len);
2770 if(write_cb(buffer, 1, len, handle) != len)
2773 len = FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8;
2774 slen = strlen(block->mime_type);
2775 pack_uint32_(slen, buffer, len);
2776 if(write_cb(buffer, 1, len, handle) != len)
2778 if(write_cb(block->mime_type, 1, slen, handle) != slen)
2781 len = FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8;
2782 slen = strlen((const char *)block->description);
2783 pack_uint32_(slen, buffer, len);
2784 if(write_cb(buffer, 1, len, handle) != len)
2786 if(write_cb(block->description, 1, slen, handle) != slen)
2789 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8;
2790 pack_uint32_(block->width, buffer, len);
2791 if(write_cb(buffer, 1, len, handle) != len)
2794 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8;
2795 pack_uint32_(block->height, buffer, len);
2796 if(write_cb(buffer, 1, len, handle) != len)
2799 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8;
2800 pack_uint32_(block->depth, buffer, len);
2801 if(write_cb(buffer, 1, len, handle) != len)
2804 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8;
2805 pack_uint32_(block->colors, buffer, len);
2806 if(write_cb(buffer, 1, len, handle) != len)
2809 len = FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8;
2810 pack_uint32_(block->data_length, buffer, len);
2811 if(write_cb(buffer, 1, len, handle) != len)
2813 if(write_cb(block->data, 1, block->data_length, handle) != block->data_length)
2819 FLAC__bool write_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2821 if(write_cb(block->data, 1, block_length, handle) != block_length)
2827 FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block)
2829 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2830 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2834 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2837 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2840 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2841 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2845 return read_metadata_block_header_(iterator);
2848 FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last)
2850 FLAC__StreamMetadata *padding;
2852 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2853 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2857 block->is_last = false;
2859 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2862 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2865 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
2866 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2868 padding->is_last = padding_is_last;
2869 padding->length = padding_length;
2871 if(!write_metadata_block_header_(iterator->file, &iterator->status, padding)) {
2872 FLAC__metadata_object_delete(padding);
2876 if(!write_metadata_block_data_(iterator->file, &iterator->status, padding)) {
2877 FLAC__metadata_object_delete(padding);
2881 FLAC__metadata_object_delete(padding);
2883 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2884 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2888 return read_metadata_block_header_(iterator);
2891 FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append)
2893 FILE *tempfile = NULL;
2894 char *tempfilename = NULL;
2895 int fixup_is_last_code = 0; /* 0 => no need to change any is_last flags */
2896 off_t fixup_is_last_flag_offset = -1;
2898 FLAC__ASSERT(0 != block || append == false);
2900 if(iterator->is_last) {
2902 fixup_is_last_code = 1; /* 1 => clear the is_last flag at the following offset */
2903 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2905 else if(0 == block) {
2906 simple_iterator_push_(iterator);
2907 if(!FLAC__metadata_simple_iterator_prev(iterator)) {
2908 (void)simple_iterator_pop_(iterator);
2911 fixup_is_last_code = -1; /* -1 => set the is_last the flag at the following offset */
2912 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2913 if(!simple_iterator_pop_(iterator))
2918 if(!simple_iterator_copy_file_prefix_(iterator, &tempfile, &tempfilename, append))
2922 if(!write_metadata_block_header_(tempfile, &iterator->status, block)) {
2923 cleanup_tempfile_(&tempfile, &tempfilename);
2927 if(!write_metadata_block_data_(tempfile, &iterator->status, block)) {
2928 cleanup_tempfile_(&tempfile, &tempfilename);
2933 if(!simple_iterator_copy_file_postfix_(iterator, &tempfile, &tempfilename, fixup_is_last_code, fixup_is_last_flag_offset, block==0))
2937 return FLAC__metadata_simple_iterator_next(iterator);
2942 void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator)
2944 FLAC__ASSERT(iterator->depth+1 < SIMPLE_ITERATOR_MAX_PUSH_DEPTH);
2945 iterator->offset[iterator->depth+1] = iterator->offset[iterator->depth];
2949 FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator)
2951 FLAC__ASSERT(iterator->depth > 0);
2953 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2954 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2958 return read_metadata_block_header_(iterator);
2965 * 3: not a FLAC file
2967 unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb)
2969 FLAC__byte buffer[4];
2973 FLAC__ASSERT(FLAC__STREAM_SYNC_LENGTH == sizeof(buffer));
2975 /* skip any id3v2 tag */
2977 n = read_cb(buffer, 1, 4, handle);
2982 else if(0 == memcmp(buffer, "ID3", 3)) {
2983 unsigned tag_length = 0;
2985 /* skip to the tag length */
2986 if(seek_cb(handle, 2, SEEK_CUR) < 0)
2989 /* read the length */
2990 for(i = 0; i < 4; i++) {
2991 if(read_cb(buffer, 1, 1, handle) < 1 || buffer[0] & 0x80)
2994 tag_length |= (buffer[0] & 0x7f);
2997 /* skip the rest of the tag */
2998 if(seek_cb(handle, tag_length, SEEK_CUR) < 0)
3001 /* read the stream sync code */
3003 n = read_cb(buffer, 1, 4, handle);
3010 /* check for the fLaC signature */
3011 if(0 == memcmp(FLAC__STREAM_SYNC_STRING, buffer, FLAC__STREAM_SYNC_LENGTH))
3017 unsigned seek_to_first_metadata_block_(FILE *f)
3019 return seek_to_first_metadata_block_cb_((FLAC__IOHandle)f, (FLAC__IOCallback_Read)fread, fseek_wrapper_);
3022 FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append)
3024 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];
3026 if(0 != fseeko(iterator->file, 0, SEEK_SET)) {
3027 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3030 if(!open_tempfile_(iterator->filename, iterator->tempfile_path_prefix, tempfile, tempfilename, &iterator->status)) {
3031 cleanup_tempfile_(tempfile, tempfilename);
3034 if(!copy_n_bytes_from_file_(iterator->file, *tempfile, offset_end, &iterator->status)) {
3035 cleanup_tempfile_(tempfile, tempfilename);
3042 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)
3044 off_t save_offset = iterator->offset[iterator->depth];
3045 FLAC__ASSERT(0 != *tempfile);
3047 if(0 != fseeko(iterator->file, save_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length, SEEK_SET)) {
3048 cleanup_tempfile_(tempfile, tempfilename);
3049 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3052 if(!copy_remaining_bytes_from_file_(iterator->file, *tempfile, &iterator->status)) {
3053 cleanup_tempfile_(tempfile, tempfilename);
3057 if(fixup_is_last_code != 0) {
3059 * if code == 1, it means a block was appended to the end so
3060 * we have to clear the is_last flag of the previous block
3061 * if code == -1, it means the last block was deleted so
3062 * we have to set the is_last flag of the previous block
3064 /* MAGIC NUMBERs here; we know the is_last flag is the high bit of the byte at this location */
3066 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3067 cleanup_tempfile_(tempfile, tempfilename);
3068 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3071 if(fread(&x, 1, 1, *tempfile) != 1) {
3072 cleanup_tempfile_(tempfile, tempfilename);
3073 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3076 if(fixup_is_last_code > 0) {
3077 FLAC__ASSERT(x & 0x80);
3081 FLAC__ASSERT(!(x & 0x80));
3084 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3085 cleanup_tempfile_(tempfile, tempfilename);
3086 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3089 if(local__fwrite(&x, 1, 1, *tempfile) != 1) {
3090 cleanup_tempfile_(tempfile, tempfilename);
3091 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3096 (void)fclose(iterator->file);
3098 if(!transport_tempfile_(iterator->filename, tempfile, tempfilename, &iterator->status))
3101 if(iterator->has_stats)
3102 set_file_stats_(iterator->filename, &iterator->stats);
3104 if(!simple_iterator_prime_input_(iterator, !iterator->is_writable))
3107 while(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length < save_offset)
3108 if(!FLAC__metadata_simple_iterator_next(iterator))
3113 /* move the iterator to it's original block faster by faking a push, then doing a pop_ */
3114 FLAC__ASSERT(iterator->depth == 0);
3115 iterator->offset[0] = save_offset;
3117 return simple_iterator_pop_(iterator);
3121 FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status)
3123 FLAC__byte buffer[8192];
3126 FLAC__ASSERT(bytes >= 0);
3128 n = flac_min(sizeof(buffer), (size_t)bytes);
3129 if(fread(buffer, 1, n, file) != n) {
3130 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3133 if(local__fwrite(buffer, 1, n, tempfile) != n) {
3134 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3143 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)
3145 FLAC__byte buffer[8192];
3148 FLAC__ASSERT(bytes >= 0);
3150 n = flac_min(sizeof(buffer), (size_t)bytes);
3151 if(read_cb(buffer, 1, n, handle) != n) {
3152 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3155 if(temp_write_cb(buffer, 1, n, temp_handle) != n) {
3156 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3165 FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status)
3167 FLAC__byte buffer[8192];
3170 while(!feof(file)) {
3171 n = fread(buffer, 1, sizeof(buffer), file);
3172 if(n == 0 && !feof(file)) {
3173 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3176 if(n > 0 && local__fwrite(buffer, 1, n, tempfile) != n) {
3177 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3185 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)
3187 FLAC__byte buffer[8192];
3190 while(!eof_cb(handle)) {
3191 n = read_cb(buffer, 1, sizeof(buffer), handle);
3192 if(n == 0 && !eof_cb(handle)) {
3193 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3196 if(n > 0 && temp_write_cb(buffer, 1, n, temp_handle) != n) {
3197 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3205 FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3207 static const char *tempfile_suffix = ".metadata_edit";
3208 if(0 == tempfile_path_prefix) {
3209 if(0 == (*tempfilename = safe_malloc_add_3op_(strlen(filename), /*+*/strlen(tempfile_suffix), /*+*/1))) {
3210 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3213 strcpy(*tempfilename, filename);
3214 strcat(*tempfilename, tempfile_suffix);
3217 const char *p = strrchr(filename, '/');
3223 if(0 == (*tempfilename = safe_malloc_add_4op_(strlen(tempfile_path_prefix), /*+*/strlen(p), /*+*/strlen(tempfile_suffix), /*+*/2))) {
3224 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3227 strcpy(*tempfilename, tempfile_path_prefix);
3228 strcat(*tempfilename, "/");
3229 strcat(*tempfilename, p);
3230 strcat(*tempfilename, tempfile_suffix);
3233 if(0 == (*tempfile = fopen(*tempfilename, "w+b"))) {
3234 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
3241 FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3243 FLAC__ASSERT(0 != filename);
3244 FLAC__ASSERT(0 != tempfile);
3245 FLAC__ASSERT(0 != *tempfile);
3246 FLAC__ASSERT(0 != tempfilename);
3247 FLAC__ASSERT(0 != *tempfilename);
3248 FLAC__ASSERT(0 != status);
3250 (void)fclose(*tempfile);
3253 #if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__ || defined __EMX__
3254 /* on some flavors of windows, rename() will fail if the destination already exists */
3255 if(unlink(filename) < 0) {
3256 cleanup_tempfile_(tempfile, tempfilename);
3257 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR;
3262 /*@@@ to fully support the tempfile_path_prefix we need to update this piece to actually copy across filesystems instead of just rename(): */
3263 if(0 != rename(*tempfilename, filename)) {
3264 cleanup_tempfile_(tempfile, tempfilename);
3265 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR;
3269 cleanup_tempfile_(tempfile, tempfilename);
3274 void cleanup_tempfile_(FILE **tempfile, char **tempfilename)
3276 if(0 != *tempfile) {
3277 (void)fclose(*tempfile);
3281 if(0 != *tempfilename) {
3282 (void)unlink(*tempfilename);
3283 free(*tempfilename);
3288 FLAC__bool get_file_stats_(const char *filename, struct stat *stats)
3290 FLAC__ASSERT(0 != filename);
3291 FLAC__ASSERT(0 != stats);
3292 return (0 == stat(filename, stats));
3295 void set_file_stats_(const char *filename, struct stat *stats)
3297 struct utimbuf srctime;
3299 FLAC__ASSERT(0 != filename);
3300 FLAC__ASSERT(0 != stats);
3302 srctime.actime = stats->st_atime;
3303 srctime.modtime = stats->st_mtime;
3304 (void)chmod(filename, stats->st_mode);
3305 (void)utime(filename, &srctime);
3306 #if !defined _MSC_VER && !defined __BORLANDC__ && !defined __MINGW32__
3307 (void)chown(filename, stats->st_uid, -1);
3308 (void)chown(filename, -1, stats->st_gid);
3312 int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence)
3314 return fseeko((FILE*)handle, (off_t)offset, whence);
3317 FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle)
3319 return ftello((FILE*)handle);
3322 FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status)
3325 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK:
3326 return FLAC__METADATA_CHAIN_STATUS_OK;
3327 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT:
3328 return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT;
3329 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE:
3330 return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
3331 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE:
3332 return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
3333 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE:
3334 return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE;
3335 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA:
3336 return FLAC__METADATA_CHAIN_STATUS_BAD_METADATA;
3337 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR:
3338 return FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
3339 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR:
3340 return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
3341 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR:
3342 return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
3343 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR:
3344 return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR;
3345 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR:
3346 return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR;
3347 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR:
3348 return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
3349 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR:
3351 return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;