1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2001,2002,2003,2004,2005,2006,2007 Josh Coalson
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * - Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * - Neither the name of the Xiph.org Foundation nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 #if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__
42 #if defined __BORLANDC__
43 #include <utime.h> /* for utime() */
45 #include <sys/utime.h> /* for utime() */
47 #include <io.h> /* for chmod() */
48 #include <sys/types.h> /* for off_t */
49 #if _MSC_VER <= 1600 || defined __BORLANDC__ /* @@@ [2G limit] */
54 #include <sys/types.h> /* some flavors of BSD (like OS X) require this to get time_t */
55 #include <utime.h> /* for utime() */
56 #include <unistd.h> /* for chown(), unlink() */
58 #include <sys/stat.h> /* for stat(), maybe chmod() */
60 #include "private/metadata.h"
62 #include "FLAC/assert.h"
63 #include "FLAC/stream_decoder.h"
68 #define max(a,b) ((a)>(b)?(a):(b))
72 #define min(a,b) ((a)<(b)?(a):(b))
75 /****************************************************************************
77 * Local function declarations
79 ***************************************************************************/
81 static void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
82 static void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
83 static void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes);
84 static FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes);
85 static FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes);
86 static FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes);
88 static FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator);
89 static FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block);
90 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);
91 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);
92 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block);
93 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);
94 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);
95 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);
96 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);
97 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment *block);
98 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track);
99 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block);
100 static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block);
101 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);
103 static FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
104 static FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
105 static FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
106 static FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
107 static FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block);
108 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);
109 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);
110 static FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block);
111 static FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block);
112 static FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block);
113 static FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block);
114 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);
116 static FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block);
117 static FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last);
118 static FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append);
120 static void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator);
121 static FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator);
123 static unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb);
124 static unsigned seek_to_first_metadata_block_(FILE *f);
126 static FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append);
127 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);
129 static FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status);
130 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);
131 static FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status);
132 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);
134 static FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
135 static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
136 static void cleanup_tempfile_(FILE **tempfile, char **tempfilename);
138 static FLAC__bool get_file_stats_(const char *filename, struct stat *stats);
139 static void set_file_stats_(const char *filename, struct stat *stats);
141 static int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence);
142 static FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle);
144 static FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status);
147 #ifdef FLAC__VALGRIND_TESTING
148 static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
150 size_t ret = fwrite(ptr, size, nmemb, stream);
156 #define local__fwrite fwrite
159 /****************************************************************************
161 * Level 0 implementation
163 ***************************************************************************/
165 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
166 static void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
167 static void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
170 FLAC__bool got_error;
171 FLAC__StreamMetadata *object;
172 } level0_client_data;
174 static FLAC__StreamMetadata *get_one_metadata_block_(const char *filename, FLAC__MetadataType type)
176 level0_client_data cd;
177 FLAC__StreamDecoder *decoder;
179 FLAC__ASSERT(0 != filename);
181 cd.got_error = false;
184 decoder = FLAC__stream_decoder_new();
189 FLAC__stream_decoder_set_md5_checking(decoder, false);
190 FLAC__stream_decoder_set_metadata_ignore_all(decoder);
191 FLAC__stream_decoder_set_metadata_respond(decoder, type);
193 if(FLAC__stream_decoder_init_file(decoder, filename, write_callback_, metadata_callback_, error_callback_, &cd) != FLAC__STREAM_DECODER_INIT_STATUS_OK || cd.got_error) {
194 (void)FLAC__stream_decoder_finish(decoder);
195 FLAC__stream_decoder_delete(decoder);
199 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder) || cd.got_error) {
200 (void)FLAC__stream_decoder_finish(decoder);
201 FLAC__stream_decoder_delete(decoder);
203 FLAC__metadata_object_delete(cd.object);
207 (void)FLAC__stream_decoder_finish(decoder);
208 FLAC__stream_decoder_delete(decoder);
213 FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo)
215 FLAC__StreamMetadata *object;
217 FLAC__ASSERT(0 != filename);
218 FLAC__ASSERT(0 != streaminfo);
220 object = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_STREAMINFO);
223 /* can just copy the contents since STREAMINFO has no internal structure */
224 *streaminfo = *object;
225 FLAC__metadata_object_delete(object);
233 FLAC_API FLAC__bool FLAC__metadata_get_tags(const char *filename, FLAC__StreamMetadata **tags)
235 FLAC__ASSERT(0 != filename);
236 FLAC__ASSERT(0 != tags);
238 *tags = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_VORBIS_COMMENT);
243 FLAC_API FLAC__bool FLAC__metadata_get_cuesheet(const char *filename, FLAC__StreamMetadata **cuesheet)
245 FLAC__ASSERT(0 != filename);
246 FLAC__ASSERT(0 != cuesheet);
248 *cuesheet = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_CUESHEET);
250 return 0 != *cuesheet;
253 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
255 (void)decoder, (void)frame, (void)buffer, (void)client_data;
257 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
260 void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
262 level0_client_data *cd = (level0_client_data *)client_data;
266 * we assume we only get here when the one metadata block we were
267 * looking for was passed to us
269 if(!cd->got_error && 0 == cd->object) {
270 if(0 == (cd->object = FLAC__metadata_object_clone(metadata)))
271 cd->got_error = true;
275 void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
277 level0_client_data *cd = (level0_client_data *)client_data;
280 if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
281 cd->got_error = true;
284 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)
286 FLAC__Metadata_SimpleIterator *it;
287 FLAC__uint64 max_area_seen = 0;
288 FLAC__uint64 max_depth_seen = 0;
290 FLAC__ASSERT(0 != filename);
291 FLAC__ASSERT(0 != picture);
295 it = FLAC__metadata_simple_iterator_new();
298 if(!FLAC__metadata_simple_iterator_init(it, filename, /*read_only=*/true, /*preserve_file_stats=*/true)) {
299 FLAC__metadata_simple_iterator_delete(it);
303 if(FLAC__metadata_simple_iterator_get_block_type(it) == FLAC__METADATA_TYPE_PICTURE) {
304 FLAC__StreamMetadata *obj = FLAC__metadata_simple_iterator_get_block(it);
305 FLAC__uint64 area = (FLAC__uint64)obj->data.picture.width * (FLAC__uint64)obj->data.picture.height;
306 /* check constraints */
308 (type == (FLAC__StreamMetadata_Picture_Type)(-1) || type == obj->data.picture.type) &&
309 (mime_type == 0 || !strcmp(mime_type, obj->data.picture.mime_type)) &&
310 (description == 0 || !strcmp((const char *)description, (const char *)obj->data.picture.description)) &&
311 obj->data.picture.width <= max_width &&
312 obj->data.picture.height <= max_height &&
313 obj->data.picture.depth <= max_depth &&
314 obj->data.picture.colors <= max_colors &&
315 (area > max_area_seen || (area == max_area_seen && obj->data.picture.depth > max_depth_seen))
318 FLAC__metadata_object_delete(*picture);
320 max_area_seen = area;
321 max_depth_seen = obj->data.picture.depth;
324 FLAC__metadata_object_delete(obj);
327 } while(FLAC__metadata_simple_iterator_next(it));
329 FLAC__metadata_simple_iterator_delete(it);
331 return (0 != *picture);
335 /****************************************************************************
337 * Level 1 implementation
339 ***************************************************************************/
341 #define SIMPLE_ITERATOR_MAX_PUSH_DEPTH (1+4)
342 /* 1 for initial offset, +4 for our own personal use */
344 struct FLAC__Metadata_SimpleIterator {
346 char *filename, *tempfile_path_prefix;
348 FLAC__bool has_stats;
349 FLAC__bool is_writable;
350 FLAC__Metadata_SimpleIteratorStatus status;
351 off_t offset[SIMPLE_ITERATOR_MAX_PUSH_DEPTH];
352 off_t first_offset; /* this is the offset to the STREAMINFO block */
354 /* this is the metadata block header of the current block we are pointing to: */
356 FLAC__MetadataType type;
360 FLAC_API const char * const FLAC__Metadata_SimpleIteratorStatusString[] = {
361 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK",
362 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT",
363 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE",
364 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE",
365 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE",
366 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA",
367 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR",
368 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR",
369 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR",
370 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR",
371 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR",
372 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR",
373 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR"
377 FLAC_API FLAC__Metadata_SimpleIterator *FLAC__metadata_simple_iterator_new(void)
379 FLAC__Metadata_SimpleIterator *iterator = (FLAC__Metadata_SimpleIterator*)calloc(1, sizeof(FLAC__Metadata_SimpleIterator));
383 iterator->filename = 0;
384 iterator->tempfile_path_prefix = 0;
385 iterator->has_stats = false;
386 iterator->is_writable = false;
387 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
388 iterator->first_offset = iterator->offset[0] = -1;
395 static void simple_iterator_free_guts_(FLAC__Metadata_SimpleIterator *iterator)
397 FLAC__ASSERT(0 != iterator);
399 if(0 != iterator->file) {
400 fclose(iterator->file);
402 if(iterator->has_stats)
403 set_file_stats_(iterator->filename, &iterator->stats);
405 if(0 != iterator->filename) {
406 free(iterator->filename);
407 iterator->filename = 0;
409 if(0 != iterator->tempfile_path_prefix) {
410 free(iterator->tempfile_path_prefix);
411 iterator->tempfile_path_prefix = 0;
415 FLAC_API void FLAC__metadata_simple_iterator_delete(FLAC__Metadata_SimpleIterator *iterator)
417 FLAC__ASSERT(0 != iterator);
419 simple_iterator_free_guts_(iterator);
423 FLAC_API FLAC__Metadata_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__Metadata_SimpleIterator *iterator)
425 FLAC__Metadata_SimpleIteratorStatus status;
427 FLAC__ASSERT(0 != iterator);
429 status = iterator->status;
430 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
434 static FLAC__bool simple_iterator_prime_input_(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool read_only)
438 FLAC__ASSERT(0 != iterator);
440 if(read_only || 0 == (iterator->file = fopen(iterator->filename, "r+b"))) {
441 iterator->is_writable = false;
442 if(read_only || errno == EACCES) {
443 if(0 == (iterator->file = fopen(iterator->filename, "rb"))) {
444 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
449 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
454 iterator->is_writable = true;
457 ret = seek_to_first_metadata_block_(iterator->file);
461 iterator->first_offset = iterator->offset[iterator->depth] = ftello(iterator->file);
462 return read_metadata_block_header_(iterator);
464 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
467 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
470 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE;
479 @@@ If we decide to finish implementing this, put this comment back in metadata.h
481 * The 'tempfile_path_prefix' allows you to specify a directory where
482 * tempfiles should go. Remember that if your metadata edits cause the
483 * FLAC file to grow, the entire file will have to be rewritten. If
484 * 'tempfile_path_prefix' is NULL, the temp file will be written in the
485 * same directory as the original FLAC file. This makes replacing the
486 * original with the tempfile fast but requires extra space in the same
487 * partition for the tempfile. If space is a problem, you can pass a
488 * directory name belonging to a different partition in
489 * 'tempfile_path_prefix'. Note that you should use the forward slash
490 * '/' as the directory separator. A trailing slash is not needed; it
491 * will be added automatically.
493 FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats, const char *tempfile_path_prefix);
496 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)
498 const char *tempfile_path_prefix = 0; /*@@@ search for comments near 'rename(...)' for what it will take to finish implementing this */
500 FLAC__ASSERT(0 != iterator);
501 FLAC__ASSERT(0 != filename);
503 simple_iterator_free_guts_(iterator);
505 if(!read_only && preserve_file_stats)
506 iterator->has_stats = get_file_stats_(filename, &iterator->stats);
508 if(0 == (iterator->filename = strdup(filename))) {
509 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
512 if(0 != tempfile_path_prefix && 0 == (iterator->tempfile_path_prefix = strdup(tempfile_path_prefix))) {
513 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
517 return simple_iterator_prime_input_(iterator, read_only);
520 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__Metadata_SimpleIterator *iterator)
522 FLAC__ASSERT(0 != iterator);
523 FLAC__ASSERT(0 != iterator->file);
525 return iterator->is_writable;
528 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__Metadata_SimpleIterator *iterator)
530 FLAC__ASSERT(0 != iterator);
531 FLAC__ASSERT(0 != iterator->file);
533 if(iterator->is_last)
536 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
537 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
541 iterator->offset[iterator->depth] = ftello(iterator->file);
543 return read_metadata_block_header_(iterator);
546 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__Metadata_SimpleIterator *iterator)
550 FLAC__ASSERT(0 != iterator);
551 FLAC__ASSERT(0 != iterator->file);
553 if(iterator->offset[iterator->depth] == iterator->first_offset)
556 if(0 != fseeko(iterator->file, iterator->first_offset, SEEK_SET)) {
557 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
560 this_offset = iterator->first_offset;
561 if(!read_metadata_block_header_(iterator))
564 /* we ignore any error from ftello() and catch it in fseeko() */
565 while(ftello(iterator->file) + (off_t)iterator->length < iterator->offset[iterator->depth]) {
566 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
567 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
570 this_offset = ftello(iterator->file);
571 if(!read_metadata_block_header_(iterator))
575 iterator->offset[iterator->depth] = this_offset;
580 FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator)
582 FLAC__ASSERT(0 != iterator);
583 FLAC__ASSERT(0 != iterator->file);
585 return iterator->type;
588 FLAC_API FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator)
590 FLAC__StreamMetadata *block = FLAC__metadata_object_new(iterator->type);
592 FLAC__ASSERT(0 != iterator);
593 FLAC__ASSERT(0 != iterator->file);
596 block->is_last = iterator->is_last;
597 block->length = iterator->length;
599 if(!read_metadata_block_data_(iterator, block)) {
600 FLAC__metadata_object_delete(block);
604 /* back up to the beginning of the block data to stay consistent */
605 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH, SEEK_SET)) {
606 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
607 FLAC__metadata_object_delete(block);
612 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
617 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
619 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth];)
622 FLAC__ASSERT(0 != iterator);
623 FLAC__ASSERT(0 != iterator->file);
624 FLAC__ASSERT(0 != block);
626 if(!iterator->is_writable) {
627 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
631 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO || block->type == FLAC__METADATA_TYPE_STREAMINFO) {
632 if(iterator->type != block->type) {
633 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
638 block->is_last = iterator->is_last;
640 if(iterator->length == block->length)
641 return write_metadata_block_stationary_(iterator, block);
642 else if(iterator->length > block->length) {
643 if(use_padding && iterator->length >= FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) {
644 ret = write_metadata_block_stationary_with_padding_(iterator, block, iterator->length - FLAC__STREAM_METADATA_HEADER_LENGTH - block->length, block->is_last);
645 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
646 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
650 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
651 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
652 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
656 else /* iterator->length < block->length */ {
657 unsigned padding_leftover = 0;
658 FLAC__bool padding_is_last = false;
660 /* first see if we can even use padding */
661 if(iterator->is_last) {
665 const unsigned extra_padding_bytes_required = block->length - iterator->length;
666 simple_iterator_push_(iterator);
667 if(!FLAC__metadata_simple_iterator_next(iterator)) {
668 (void)simple_iterator_pop_(iterator);
671 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
675 if(FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length == extra_padding_bytes_required) {
676 padding_leftover = 0;
677 block->is_last = iterator->is_last;
679 else if(iterator->length < extra_padding_bytes_required)
682 padding_leftover = FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length - extra_padding_bytes_required;
683 padding_is_last = iterator->is_last;
684 block->is_last = false;
687 if(!simple_iterator_pop_(iterator))
692 if(padding_leftover == 0) {
693 ret = write_metadata_block_stationary_(iterator, block);
694 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
695 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
699 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
700 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
701 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
702 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
707 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
708 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
709 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
715 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
717 unsigned padding_leftover = 0;
718 FLAC__bool padding_is_last = false;
720 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length;)
723 FLAC__ASSERT(0 != iterator);
724 FLAC__ASSERT(0 != iterator->file);
725 FLAC__ASSERT(0 != block);
727 if(!iterator->is_writable)
730 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
731 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
735 block->is_last = iterator->is_last;
738 /* first see if we can even use padding */
739 if(iterator->is_last) {
743 simple_iterator_push_(iterator);
744 if(!FLAC__metadata_simple_iterator_next(iterator)) {
745 (void)simple_iterator_pop_(iterator);
748 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
752 if(iterator->length == block->length) {
753 padding_leftover = 0;
754 block->is_last = iterator->is_last;
756 else if(iterator->length < FLAC__STREAM_METADATA_HEADER_LENGTH + block->length)
759 padding_leftover = iterator->length - block->length;
760 padding_is_last = iterator->is_last;
761 block->is_last = false;
764 if(!simple_iterator_pop_(iterator))
769 /* move to the next block, which is suitable padding */
770 if(!FLAC__metadata_simple_iterator_next(iterator))
772 if(padding_leftover == 0) {
773 ret = write_metadata_block_stationary_(iterator, block);
774 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
775 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
779 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
780 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
781 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
782 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
787 ret = rewrite_whole_file_(iterator, block, /*append=*/true);
788 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
789 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
794 FLAC_API FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool use_padding)
796 FLAC__ASSERT_DECLARATION(off_t debug_target_offset = iterator->offset[iterator->depth];)
799 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO) {
800 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
805 FLAC__StreamMetadata *padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
807 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
810 padding->length = iterator->length;
811 if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false)) {
812 FLAC__metadata_object_delete(padding);
815 FLAC__metadata_object_delete(padding);
816 if(!FLAC__metadata_simple_iterator_prev(iterator))
818 FLAC__ASSERT(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length == debug_target_offset);
819 FLAC__ASSERT(ftello(iterator->file) + (off_t)iterator->length == debug_target_offset);
823 ret = rewrite_whole_file_(iterator, 0, /*append=*/false);
824 FLAC__ASSERT(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length == debug_target_offset);
825 FLAC__ASSERT(ftello(iterator->file) + (off_t)iterator->length == debug_target_offset);
832 /****************************************************************************
834 * Level 2 implementation
836 ***************************************************************************/
839 typedef struct FLAC__Metadata_Node {
840 FLAC__StreamMetadata *data;
841 struct FLAC__Metadata_Node *prev, *next;
842 } FLAC__Metadata_Node;
844 struct FLAC__Metadata_Chain {
845 char *filename; /* will be NULL if using callbacks */
847 FLAC__Metadata_Node *head;
848 FLAC__Metadata_Node *tail;
850 FLAC__Metadata_ChainStatus status;
851 off_t first_offset, last_offset;
853 * This is the length of the chain initially read from the FLAC file.
854 * it is used to compare against the current length to decide whether
855 * or not the whole file has to be rewritten.
857 off_t initial_length;
858 /* @@@ hacky, these are currently only needed by ogg reader */
859 FLAC__IOHandle handle;
860 FLAC__IOCallback_Read read_cb;
863 struct FLAC__Metadata_Iterator {
864 FLAC__Metadata_Chain *chain;
865 FLAC__Metadata_Node *current;
868 FLAC_API const char * const FLAC__Metadata_ChainStatusString[] = {
869 "FLAC__METADATA_CHAIN_STATUS_OK",
870 "FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT",
871 "FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE",
872 "FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE",
873 "FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE",
874 "FLAC__METADATA_CHAIN_STATUS_BAD_METADATA",
875 "FLAC__METADATA_CHAIN_STATUS_READ_ERROR",
876 "FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR",
877 "FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR",
878 "FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR",
879 "FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR",
880 "FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR",
881 "FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR",
882 "FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS",
883 "FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH",
884 "FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL"
888 static FLAC__Metadata_Node *node_new_(void)
890 return (FLAC__Metadata_Node*)calloc(1, sizeof(FLAC__Metadata_Node));
893 static void node_delete_(FLAC__Metadata_Node *node)
895 FLAC__ASSERT(0 != node);
897 FLAC__metadata_object_delete(node->data);
901 static void chain_init_(FLAC__Metadata_Chain *chain)
903 FLAC__ASSERT(0 != chain);
906 chain->is_ogg = false;
907 chain->head = chain->tail = 0;
909 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
910 chain->initial_length = 0;
914 static void chain_clear_(FLAC__Metadata_Chain *chain)
916 FLAC__Metadata_Node *node, *next;
918 FLAC__ASSERT(0 != chain);
920 for(node = chain->head; node; ) {
926 if(0 != chain->filename)
927 free(chain->filename);
932 static void chain_append_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
934 FLAC__ASSERT(0 != chain);
935 FLAC__ASSERT(0 != node);
936 FLAC__ASSERT(0 != node->data);
938 node->next = node->prev = 0;
939 node->data->is_last = true;
941 chain->tail->data->is_last = false;
946 FLAC__ASSERT(0 != chain->tail);
947 chain->tail->next = node;
948 node->prev = chain->tail;
954 static void chain_remove_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
956 FLAC__ASSERT(0 != chain);
957 FLAC__ASSERT(0 != node);
959 if(node == chain->head)
960 chain->head = node->next;
962 node->prev->next = node->next;
964 if(node == chain->tail)
965 chain->tail = node->prev;
967 node->next->prev = node->prev;
970 chain->tail->data->is_last = true;
975 static void chain_delete_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
977 chain_remove_node_(chain, node);
981 static off_t chain_calculate_length_(FLAC__Metadata_Chain *chain)
983 const FLAC__Metadata_Node *node;
985 for(node = chain->head; node; node = node->next)
986 length += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
990 static void iterator_insert_node_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
992 FLAC__ASSERT(0 != node);
993 FLAC__ASSERT(0 != node->data);
994 FLAC__ASSERT(0 != iterator);
995 FLAC__ASSERT(0 != iterator->current);
996 FLAC__ASSERT(0 != iterator->chain);
997 FLAC__ASSERT(0 != iterator->chain->head);
998 FLAC__ASSERT(0 != iterator->chain->tail);
1000 node->data->is_last = false;
1002 node->prev = iterator->current->prev;
1003 node->next = iterator->current;
1006 iterator->chain->head = node;
1008 node->prev->next = node;
1010 iterator->current->prev = node;
1012 iterator->chain->nodes++;
1015 static void iterator_insert_node_after_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1017 FLAC__ASSERT(0 != node);
1018 FLAC__ASSERT(0 != node->data);
1019 FLAC__ASSERT(0 != iterator);
1020 FLAC__ASSERT(0 != iterator->current);
1021 FLAC__ASSERT(0 != iterator->chain);
1022 FLAC__ASSERT(0 != iterator->chain->head);
1023 FLAC__ASSERT(0 != iterator->chain->tail);
1025 iterator->current->data->is_last = false;
1027 node->prev = iterator->current;
1028 node->next = iterator->current->next;
1031 iterator->chain->tail = node;
1033 node->next->prev = node;
1035 node->prev->next = node;
1037 iterator->chain->tail->data->is_last = true;
1039 iterator->chain->nodes++;
1042 /* return true iff node and node->next are both padding */
1043 static FLAC__bool chain_merge_adjacent_padding_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1045 if(node->data->type == FLAC__METADATA_TYPE_PADDING && 0 != node->next && node->next->data->type == FLAC__METADATA_TYPE_PADDING) {
1046 const unsigned growth = FLAC__STREAM_METADATA_HEADER_LENGTH + node->next->data->length;
1047 node->data->length += growth;
1049 chain_delete_node_(chain, node->next);
1056 /* Returns the new length of the chain, or 0 if there was an error. */
1057 /* WATCHOUT: This can get called multiple times before a write, so
1058 * it should still work when this happens.
1060 /* WATCHOUT: Make sure to also update the logic in
1061 * FLAC__metadata_chain_check_if_tempfile_needed() if the logic here changes.
1063 static off_t chain_prepare_for_write_(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1065 off_t current_length = chain_calculate_length_(chain);
1068 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1069 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1070 const off_t delta = chain->initial_length - current_length;
1071 chain->tail->data->length += delta;
1072 current_length += delta;
1073 FLAC__ASSERT(current_length == chain->initial_length);
1075 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1076 else if(current_length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) {
1077 FLAC__StreamMetadata *padding;
1078 FLAC__Metadata_Node *node;
1079 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) {
1080 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1083 padding->length = chain->initial_length - (FLAC__STREAM_METADATA_HEADER_LENGTH + current_length);
1084 if(0 == (node = node_new_())) {
1085 FLAC__metadata_object_delete(padding);
1086 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1089 node->data = padding;
1090 chain_append_node_(chain, node);
1091 current_length = chain_calculate_length_(chain);
1092 FLAC__ASSERT(current_length == chain->initial_length);
1094 /* 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 */
1095 else if(current_length > chain->initial_length) {
1096 const off_t delta = current_length - chain->initial_length;
1097 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1098 /* if the delta is exactly the size of the last padding block, remove the padding block */
1099 if((off_t)chain->tail->data->length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta) {
1100 chain_delete_node_(chain, chain->tail);
1101 current_length = chain_calculate_length_(chain);
1102 FLAC__ASSERT(current_length == chain->initial_length);
1104 /* if there is at least 'delta' bytes of padding, trim the padding down */
1105 else if((off_t)chain->tail->data->length >= delta) {
1106 chain->tail->data->length -= delta;
1107 current_length -= delta;
1108 FLAC__ASSERT(current_length == chain->initial_length);
1114 return current_length;
1117 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)
1119 FLAC__Metadata_Node *node;
1121 FLAC__ASSERT(0 != chain);
1123 /* we assume we're already at the beginning of the file */
1125 switch(seek_to_first_metadata_block_cb_(handle, read_cb, seek_cb)) {
1129 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1132 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1135 chain->status = FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
1143 FLAC__int64 pos = tell_cb(handle);
1145 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1148 chain->first_offset = (off_t)pos;
1153 FLAC__MetadataType type;
1159 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1163 if(!read_metadata_block_header_cb_(handle, read_cb, &is_last, &type, &length)) {
1164 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1168 node->data = FLAC__metadata_object_new(type);
1169 if(0 == node->data) {
1171 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1175 node->data->is_last = is_last;
1176 node->data->length = length;
1178 chain->status = get_equivalent_status_(read_metadata_block_data_cb_(handle, read_cb, seek_cb, node->data));
1179 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1183 chain_append_node_(chain, node);
1188 FLAC__int64 pos = tell_cb(handle);
1190 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1193 chain->last_offset = (off_t)pos;
1196 chain->initial_length = chain_calculate_length_(chain);
1201 FLAC__StreamDecoderReadStatus chain_read_ogg_read_cb_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
1203 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1205 if(*bytes > 0 && chain->status == FLAC__METADATA_CHAIN_STATUS_OK) {
1206 *bytes = chain->read_cb(buffer, sizeof(FLAC__byte), *bytes, chain->handle);
1208 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
1210 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
1213 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
1216 static FLAC__StreamDecoderWriteStatus chain_read_ogg_write_cb_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
1218 (void)decoder, (void)frame, (void)buffer, (void)client_data;
1219 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1222 static void chain_read_ogg_metadata_cb_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
1224 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1225 FLAC__Metadata_Node *node;
1231 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1235 node->data = FLAC__metadata_object_clone(metadata);
1236 if(0 == node->data) {
1238 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1242 chain_append_node_(chain, node);
1245 static void chain_read_ogg_error_cb_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1247 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1248 (void)decoder, (void)status;
1249 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1252 static FLAC__bool chain_read_ogg_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb)
1254 FLAC__StreamDecoder *decoder;
1256 FLAC__ASSERT(0 != chain);
1258 /* we assume we're already at the beginning of the file */
1260 chain->handle = handle;
1261 chain->read_cb = read_cb;
1262 if(0 == (decoder = FLAC__stream_decoder_new())) {
1263 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1266 FLAC__stream_decoder_set_metadata_respond_all(decoder);
1267 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) {
1268 FLAC__stream_decoder_delete(decoder);
1269 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1273 chain->first_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1275 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder))
1276 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1277 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1278 FLAC__stream_decoder_delete(decoder);
1282 FLAC__stream_decoder_delete(decoder);
1284 chain->last_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1286 chain->initial_length = chain_calculate_length_(chain);
1291 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)
1293 FLAC__Metadata_Node *node;
1295 FLAC__ASSERT(0 != chain);
1296 FLAC__ASSERT(0 != chain->head);
1298 if(0 != seek_cb(handle, chain->first_offset, SEEK_SET)) {
1299 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1303 for(node = chain->head; node; node = node->next) {
1304 if(!write_metadata_block_header_cb_(handle, write_cb, node->data)) {
1305 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1308 if(!write_metadata_block_data_cb_(handle, write_cb, node->data)) {
1309 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1314 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1316 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1320 static FLAC__bool chain_rewrite_metadata_in_place_(FLAC__Metadata_Chain *chain)
1325 FLAC__ASSERT(0 != chain->filename);
1327 if(0 == (file = fopen(chain->filename, "r+b"))) {
1328 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1332 /* chain_rewrite_metadata_in_place_cb_() sets chain->status for us */
1333 ret = chain_rewrite_metadata_in_place_cb_(chain, (FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, fseek_wrapper_);
1340 static FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix)
1344 FLAC__Metadata_SimpleIteratorStatus status;
1345 const FLAC__Metadata_Node *node;
1347 FLAC__ASSERT(0 != chain);
1348 FLAC__ASSERT(0 != chain->filename);
1349 FLAC__ASSERT(0 != chain->head);
1351 /* copy the file prefix (data up to first metadata block */
1352 if(0 == (f = fopen(chain->filename, "rb"))) {
1353 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1356 if(!open_tempfile_(chain->filename, tempfile_path_prefix, &tempfile, &tempfilename, &status)) {
1357 chain->status = get_equivalent_status_(status);
1358 cleanup_tempfile_(&tempfile, &tempfilename);
1361 if(!copy_n_bytes_from_file_(f, tempfile, chain->first_offset, &status)) {
1362 chain->status = get_equivalent_status_(status);
1363 cleanup_tempfile_(&tempfile, &tempfilename);
1367 /* write the metadata */
1368 for(node = chain->head; node; node = node->next) {
1369 if(!write_metadata_block_header_(tempfile, &status, node->data)) {
1370 chain->status = get_equivalent_status_(status);
1373 if(!write_metadata_block_data_(tempfile, &status, node->data)) {
1374 chain->status = get_equivalent_status_(status);
1378 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1380 /* copy the file postfix (everything after the metadata) */
1381 if(0 != fseeko(f, chain->last_offset, SEEK_SET)) {
1382 cleanup_tempfile_(&tempfile, &tempfilename);
1383 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1386 if(!copy_remaining_bytes_from_file_(f, tempfile, &status)) {
1387 cleanup_tempfile_(&tempfile, &tempfilename);
1388 chain->status = get_equivalent_status_(status);
1392 /* move the tempfile on top of the original */
1394 if(!transport_tempfile_(chain->filename, &tempfile, &tempfilename, &status))
1400 /* assumes 'handle' is already at beginning of file */
1401 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)
1403 FLAC__Metadata_SimpleIteratorStatus status;
1404 const FLAC__Metadata_Node *node;
1406 FLAC__ASSERT(0 != chain);
1407 FLAC__ASSERT(0 == chain->filename);
1408 FLAC__ASSERT(0 != chain->head);
1410 /* copy the file prefix (data up to first metadata block */
1411 if(!copy_n_bytes_from_file_cb_(handle, read_cb, temp_handle, temp_write_cb, chain->first_offset, &status)) {
1412 chain->status = get_equivalent_status_(status);
1416 /* write the metadata */
1417 for(node = chain->head; node; node = node->next) {
1418 if(!write_metadata_block_header_cb_(temp_handle, temp_write_cb, node->data)) {
1419 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1422 if(!write_metadata_block_data_cb_(temp_handle, temp_write_cb, node->data)) {
1423 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1427 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1429 /* copy the file postfix (everything after the metadata) */
1430 if(0 != seek_cb(handle, chain->last_offset, SEEK_SET)) {
1431 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1434 if(!copy_remaining_bytes_from_file_cb_(handle, read_cb, eof_cb, temp_handle, temp_write_cb, &status)) {
1435 chain->status = get_equivalent_status_(status);
1442 FLAC_API FLAC__Metadata_Chain *FLAC__metadata_chain_new(void)
1444 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)calloc(1, sizeof(FLAC__Metadata_Chain));
1452 FLAC_API void FLAC__metadata_chain_delete(FLAC__Metadata_Chain *chain)
1454 FLAC__ASSERT(0 != chain);
1456 chain_clear_(chain);
1461 FLAC_API FLAC__Metadata_ChainStatus FLAC__metadata_chain_status(FLAC__Metadata_Chain *chain)
1463 FLAC__Metadata_ChainStatus status;
1465 FLAC__ASSERT(0 != chain);
1467 status = chain->status;
1468 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1472 static FLAC__bool chain_read_(FLAC__Metadata_Chain *chain, const char *filename, FLAC__bool is_ogg)
1477 FLAC__ASSERT(0 != chain);
1478 FLAC__ASSERT(0 != filename);
1480 chain_clear_(chain);
1482 if(0 == (chain->filename = strdup(filename))) {
1483 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1487 chain->is_ogg = is_ogg;
1489 if(0 == (file = fopen(filename, "rb"))) {
1490 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1494 /* the function also sets chain->status for us */
1496 chain_read_ogg_cb_(chain, file, (FLAC__IOCallback_Read)fread) :
1497 chain_read_cb_(chain, file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, ftell_wrapper_)
1505 FLAC_API FLAC__bool FLAC__metadata_chain_read(FLAC__Metadata_Chain *chain, const char *filename)
1507 return chain_read_(chain, filename, /*is_ogg=*/false);
1510 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg(FLAC__Metadata_Chain *chain, const char *filename)
1512 return chain_read_(chain, filename, /*is_ogg=*/true);
1515 static FLAC__bool chain_read_with_callbacks_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks, FLAC__bool is_ogg)
1519 FLAC__ASSERT(0 != chain);
1521 chain_clear_(chain);
1523 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.tell) {
1524 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1528 chain->is_ogg = is_ogg;
1531 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1532 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1536 /* the function also sets chain->status for us */
1538 chain_read_ogg_cb_(chain, handle, callbacks.read) :
1539 chain_read_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.tell)
1545 FLAC_API FLAC__bool FLAC__metadata_chain_read_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1547 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/false);
1550 FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1552 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/true);
1555 FLAC_API FLAC__bool FLAC__metadata_chain_check_if_tempfile_needed(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1557 /* This does all the same checks that are in chain_prepare_for_write_()
1558 * but doesn't actually alter the chain. Make sure to update the logic
1559 * here if chain_prepare_for_write_() changes.
1561 const off_t current_length = chain_calculate_length_(chain);
1563 FLAC__ASSERT(0 != chain);
1566 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1567 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING)
1569 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1570 else if(current_length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length)
1572 /* 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 */
1573 else if(current_length > chain->initial_length) {
1574 const off_t delta = current_length - chain->initial_length;
1575 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1576 /* if the delta is exactly the size of the last padding block, remove the padding block */
1577 if((off_t)chain->tail->data->length + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta)
1579 /* if there is at least 'delta' bytes of padding, trim the padding down */
1580 else if((off_t)chain->tail->data->length >= delta)
1586 return (current_length != chain->initial_length);
1589 FLAC_API FLAC__bool FLAC__metadata_chain_write(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats)
1592 const char *tempfile_path_prefix = 0;
1593 off_t current_length;
1595 FLAC__ASSERT(0 != chain);
1597 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1598 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1602 if (0 == chain->filename) {
1603 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1607 current_length = chain_prepare_for_write_(chain, use_padding);
1609 /* a return value of 0 means there was an error; chain->status is already set */
1610 if (0 == current_length)
1613 if(preserve_file_stats)
1614 get_file_stats_(chain->filename, &stats);
1616 if(current_length == chain->initial_length) {
1617 if(!chain_rewrite_metadata_in_place_(chain))
1621 if(!chain_rewrite_file_(chain, tempfile_path_prefix))
1624 /* recompute lengths and offsets */
1626 const FLAC__Metadata_Node *node;
1627 chain->initial_length = current_length;
1628 chain->last_offset = chain->first_offset;
1629 for(node = chain->head; node; node = node->next)
1630 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1634 if(preserve_file_stats)
1635 set_file_stats_(chain->filename, &stats);
1640 FLAC_API FLAC__bool FLAC__metadata_chain_write_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1642 off_t current_length;
1644 FLAC__ASSERT(0 != chain);
1646 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1647 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1651 if (0 != chain->filename) {
1652 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1656 if (0 == callbacks.write || 0 == callbacks.seek) {
1657 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1661 if (FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1662 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1666 current_length = chain_prepare_for_write_(chain, use_padding);
1668 /* a return value of 0 means there was an error; chain->status is already set */
1669 if (0 == current_length)
1672 FLAC__ASSERT(current_length == chain->initial_length);
1674 return chain_rewrite_metadata_in_place_cb_(chain, handle, callbacks.write, callbacks.seek);
1677 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)
1679 off_t current_length;
1681 FLAC__ASSERT(0 != chain);
1683 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1684 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1688 if (0 != chain->filename) {
1689 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1693 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.eof) {
1694 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1697 if (0 == temp_callbacks.write) {
1698 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1702 if (!FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1703 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1707 current_length = chain_prepare_for_write_(chain, use_padding);
1709 /* a return value of 0 means there was an error; chain->status is already set */
1710 if (0 == current_length)
1713 FLAC__ASSERT(current_length != chain->initial_length);
1716 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1717 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1721 if(!chain_rewrite_file_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.eof, temp_handle, temp_callbacks.write))
1724 /* recompute lengths and offsets */
1726 const FLAC__Metadata_Node *node;
1727 chain->initial_length = current_length;
1728 chain->last_offset = chain->first_offset;
1729 for(node = chain->head; node; node = node->next)
1730 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1736 FLAC_API void FLAC__metadata_chain_merge_padding(FLAC__Metadata_Chain *chain)
1738 FLAC__Metadata_Node *node;
1740 FLAC__ASSERT(0 != chain);
1742 for(node = chain->head; node; ) {
1743 if(!chain_merge_adjacent_padding_(chain, node))
1748 FLAC_API void FLAC__metadata_chain_sort_padding(FLAC__Metadata_Chain *chain)
1750 FLAC__Metadata_Node *node, *save;
1753 FLAC__ASSERT(0 != chain);
1756 * Don't try and be too smart... this simple algo is good enough for
1757 * the small number of nodes that we deal with.
1759 for(i = 0, node = chain->head; i < chain->nodes; i++) {
1760 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1762 chain_remove_node_(chain, node);
1763 chain_append_node_(chain, node);
1771 FLAC__metadata_chain_merge_padding(chain);
1775 FLAC_API FLAC__Metadata_Iterator *FLAC__metadata_iterator_new(void)
1777 FLAC__Metadata_Iterator *iterator = (FLAC__Metadata_Iterator*)calloc(1, sizeof(FLAC__Metadata_Iterator));
1779 /* calloc() implies:
1780 iterator->current = 0;
1781 iterator->chain = 0;
1787 FLAC_API void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator)
1789 FLAC__ASSERT(0 != iterator);
1794 FLAC_API void FLAC__metadata_iterator_init(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Chain *chain)
1796 FLAC__ASSERT(0 != iterator);
1797 FLAC__ASSERT(0 != chain);
1798 FLAC__ASSERT(0 != chain->head);
1800 iterator->chain = chain;
1801 iterator->current = chain->head;
1804 FLAC_API FLAC__bool FLAC__metadata_iterator_next(FLAC__Metadata_Iterator *iterator)
1806 FLAC__ASSERT(0 != iterator);
1808 if(0 == iterator->current || 0 == iterator->current->next)
1811 iterator->current = iterator->current->next;
1815 FLAC_API FLAC__bool FLAC__metadata_iterator_prev(FLAC__Metadata_Iterator *iterator)
1817 FLAC__ASSERT(0 != iterator);
1819 if(0 == iterator->current || 0 == iterator->current->prev)
1822 iterator->current = iterator->current->prev;
1826 FLAC_API FLAC__MetadataType FLAC__metadata_iterator_get_block_type(const FLAC__Metadata_Iterator *iterator)
1828 FLAC__ASSERT(0 != iterator);
1829 FLAC__ASSERT(0 != iterator->current);
1830 FLAC__ASSERT(0 != iterator->current->data);
1832 return iterator->current->data->type;
1835 FLAC_API FLAC__StreamMetadata *FLAC__metadata_iterator_get_block(FLAC__Metadata_Iterator *iterator)
1837 FLAC__ASSERT(0 != iterator);
1838 FLAC__ASSERT(0 != iterator->current);
1840 return iterator->current->data;
1843 FLAC_API FLAC__bool FLAC__metadata_iterator_set_block(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1845 FLAC__ASSERT(0 != iterator);
1846 FLAC__ASSERT(0 != block);
1847 return FLAC__metadata_iterator_delete_block(iterator, false) && FLAC__metadata_iterator_insert_block_after(iterator, block);
1850 FLAC_API FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__Metadata_Iterator *iterator, FLAC__bool replace_with_padding)
1852 FLAC__Metadata_Node *save;
1854 FLAC__ASSERT(0 != iterator);
1855 FLAC__ASSERT(0 != iterator->current);
1857 if(0 == iterator->current->prev) {
1858 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1862 save = iterator->current->prev;
1864 if(replace_with_padding) {
1865 FLAC__metadata_object_delete_data(iterator->current->data);
1866 iterator->current->data->type = FLAC__METADATA_TYPE_PADDING;
1869 chain_delete_node_(iterator->chain, iterator->current);
1872 iterator->current = save;
1876 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1878 FLAC__Metadata_Node *node;
1880 FLAC__ASSERT(0 != iterator);
1881 FLAC__ASSERT(0 != iterator->current);
1882 FLAC__ASSERT(0 != block);
1884 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1887 if(0 == iterator->current->prev) {
1888 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1892 if(0 == (node = node_new_()))
1896 iterator_insert_node_(iterator, node);
1897 iterator->current = node;
1901 FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1903 FLAC__Metadata_Node *node;
1905 FLAC__ASSERT(0 != iterator);
1906 FLAC__ASSERT(0 != iterator->current);
1907 FLAC__ASSERT(0 != block);
1909 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
1912 if(0 == (node = node_new_()))
1916 iterator_insert_node_after_(iterator, node);
1917 iterator->current = node;
1922 /****************************************************************************
1924 * Local function definitions
1926 ***************************************************************************/
1928 void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1934 for(i = 0; i < bytes; i++) {
1935 *(--b) = (FLAC__byte)(val & 0xff);
1940 void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
1944 for(i = 0; i < bytes; i++) {
1945 *(b++) = (FLAC__byte)(val & 0xff);
1950 void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes)
1956 for(i = 0; i < bytes; i++) {
1957 *(--b) = (FLAC__byte)(val & 0xff);
1962 FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes)
1964 FLAC__uint32 ret = 0;
1967 for(i = 0; i < bytes; i++)
1968 ret = (ret << 8) | (FLAC__uint32)(*b++);
1973 FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes)
1975 FLAC__uint32 ret = 0;
1980 for(i = 0; i < bytes; i++)
1981 ret = (ret << 8) | (FLAC__uint32)(*--b);
1986 FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes)
1988 FLAC__uint64 ret = 0;
1991 for(i = 0; i < bytes; i++)
1992 ret = (ret << 8) | (FLAC__uint64)(*b++);
1997 FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator)
1999 FLAC__ASSERT(0 != iterator);
2000 FLAC__ASSERT(0 != iterator->file);
2002 if(!read_metadata_block_header_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, &iterator->is_last, &iterator->type, &iterator->length)) {
2003 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2010 FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block)
2012 FLAC__ASSERT(0 != iterator);
2013 FLAC__ASSERT(0 != iterator->file);
2015 iterator->status = read_metadata_block_data_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, block);
2017 return (iterator->status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK);
2020 FLAC__bool read_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__bool *is_last, FLAC__MetadataType *type, unsigned *length)
2022 FLAC__byte raw_header[FLAC__STREAM_METADATA_HEADER_LENGTH];
2024 if(read_cb(raw_header, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2027 *is_last = raw_header[0] & 0x80? true : false;
2028 *type = (FLAC__MetadataType)(raw_header[0] & 0x7f);
2029 *length = unpack_uint32_(raw_header + 1, 3);
2031 /* Note that we don't check:
2032 * if(iterator->type >= FLAC__METADATA_TYPE_UNDEFINED)
2033 * we just will read in an opaque block
2039 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata *block)
2041 switch(block->type) {
2042 case FLAC__METADATA_TYPE_STREAMINFO:
2043 return read_metadata_block_data_streaminfo_cb_(handle, read_cb, &block->data.stream_info);
2044 case FLAC__METADATA_TYPE_PADDING:
2045 return read_metadata_block_data_padding_cb_(handle, seek_cb, &block->data.padding, block->length);
2046 case FLAC__METADATA_TYPE_APPLICATION:
2047 return read_metadata_block_data_application_cb_(handle, read_cb, &block->data.application, block->length);
2048 case FLAC__METADATA_TYPE_SEEKTABLE:
2049 return read_metadata_block_data_seektable_cb_(handle, read_cb, &block->data.seek_table, block->length);
2050 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2051 return read_metadata_block_data_vorbis_comment_cb_(handle, read_cb, &block->data.vorbis_comment);
2052 case FLAC__METADATA_TYPE_CUESHEET:
2053 return read_metadata_block_data_cuesheet_cb_(handle, read_cb, &block->data.cue_sheet);
2054 case FLAC__METADATA_TYPE_PICTURE:
2055 return read_metadata_block_data_picture_cb_(handle, read_cb, &block->data.picture);
2057 return read_metadata_block_data_unknown_cb_(handle, read_cb, &block->data.unknown, block->length);
2061 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block)
2063 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH], *b;
2065 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2066 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2070 /* we are using hardcoded numbers for simplicity but we should
2071 * probably eventually write a bit-level unpacker and use the
2072 * _STREAMINFO_ constants.
2074 block->min_blocksize = unpack_uint32_(b, 2); b += 2;
2075 block->max_blocksize = unpack_uint32_(b, 2); b += 2;
2076 block->min_framesize = unpack_uint32_(b, 3); b += 3;
2077 block->max_framesize = unpack_uint32_(b, 3); b += 3;
2078 block->sample_rate = (unpack_uint32_(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4);
2079 block->channels = (unsigned)((b[2] & 0x0e) >> 1) + 1;
2080 block->bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 4) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1;
2081 block->total_samples = (((FLAC__uint64)(b[3] & 0x0f)) << 32) | unpack_uint64_(b+4, 4);
2082 memcpy(block->md5sum, b+8, 16);
2084 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2087 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_Padding *block, unsigned block_length)
2089 (void)block; /* nothing to do; we don't care about reading the padding bytes */
2091 if(0 != seek_cb(handle, block_length, SEEK_CUR))
2092 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2094 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2097 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Application *block, unsigned block_length)
2099 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2101 if(read_cb(block->id, 1, id_bytes, handle) != id_bytes)
2102 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2104 block_length -= id_bytes;
2106 if(block_length == 0) {
2110 if(0 == (block->data = (FLAC__byte*)malloc(block_length)))
2111 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2113 if(read_cb(block->data, 1, block_length, handle) != block_length)
2114 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2117 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2120 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_SeekTable *block, unsigned block_length)
2123 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2125 FLAC__ASSERT(block_length % FLAC__STREAM_METADATA_SEEKPOINT_LENGTH == 0);
2127 block->num_points = block_length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
2129 if(block->num_points == 0)
2131 else if(0 == (block->points = (FLAC__StreamMetadata_SeekPoint*)malloc(block->num_points * sizeof(FLAC__StreamMetadata_SeekPoint))))
2132 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2134 for(i = 0; i < block->num_points; i++) {
2135 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2136 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2137 /* some MAGIC NUMBERs here */
2138 block->points[i].sample_number = unpack_uint64_(buffer, 8);
2139 block->points[i].stream_offset = unpack_uint64_(buffer+8, 8);
2140 block->points[i].frame_samples = unpack_uint32_(buffer+16, 2);
2143 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2146 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment_Entry *entry)
2148 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2149 FLAC__byte buffer[4]; /* magic number is asserted below */
2151 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8 == sizeof(buffer));
2153 if(read_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2154 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2155 entry->length = unpack_uint32_little_endian_(buffer, entry_length_len);
2157 if(0 != entry->entry)
2160 if(entry->length == 0) {
2164 if(0 == (entry->entry = (FLAC__byte*)malloc(entry->length+1)))
2165 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2167 if(read_cb(entry->entry, 1, entry->length, handle) != entry->length)
2168 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2170 entry->entry[entry->length] = '\0';
2173 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2176 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment *block)
2179 FLAC__Metadata_SimpleIteratorStatus status;
2180 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2181 FLAC__byte buffer[4]; /* magic number is asserted below */
2183 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8 == sizeof(buffer));
2185 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, &(block->vendor_string))))
2188 if(read_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2189 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2190 block->num_comments = unpack_uint32_little_endian_(buffer, num_comments_len);
2192 if(block->num_comments == 0) {
2193 block->comments = 0;
2195 else if(0 == (block->comments = (FLAC__StreamMetadata_VorbisComment_Entry*)calloc(block->num_comments, sizeof(FLAC__StreamMetadata_VorbisComment_Entry))))
2196 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2198 for(i = 0; i < block->num_comments; i++) {
2199 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, block->comments + i)))
2203 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2206 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track)
2209 FLAC__byte buffer[32]; /* asserted below that this is big enough */
2211 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2212 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2213 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);
2215 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2216 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2217 if(read_cb(buffer, 1, len, handle) != len)
2218 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2219 track->offset = unpack_uint64_(buffer, len);
2221 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2222 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2223 if(read_cb(buffer, 1, len, handle) != len)
2224 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2225 track->number = (FLAC__byte)unpack_uint32_(buffer, len);
2227 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2228 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2229 if(read_cb(track->isrc, 1, len, handle) != len)
2230 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2232 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);
2233 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2234 if(read_cb(buffer, 1, len, handle) != len)
2235 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2236 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN == 1);
2237 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN == 1);
2238 track->type = buffer[0] >> 7;
2239 track->pre_emphasis = (buffer[0] >> 6) & 1;
2241 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2242 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2243 if(read_cb(buffer, 1, len, handle) != len)
2244 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2245 track->num_indices = (FLAC__byte)unpack_uint32_(buffer, len);
2247 if(track->num_indices == 0) {
2250 else if(0 == (track->indices = (FLAC__StreamMetadata_CueSheet_Index*)calloc(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index))))
2251 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2253 for(i = 0; i < track->num_indices; i++) {
2254 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2255 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2256 if(read_cb(buffer, 1, len, handle) != len)
2257 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2258 track->indices[i].offset = unpack_uint64_(buffer, len);
2260 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2261 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2262 if(read_cb(buffer, 1, len, handle) != len)
2263 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2264 track->indices[i].number = (FLAC__byte)unpack_uint32_(buffer, len);
2266 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2267 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2268 if(read_cb(buffer, 1, len, handle) != len)
2269 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2272 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2275 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block)
2278 FLAC__Metadata_SimpleIteratorStatus status;
2279 FLAC__byte buffer[1024]; /* MSVC needs a constant expression so we put a magic number and assert */
2281 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN)/8 <= sizeof(buffer));
2282 FLAC__ASSERT(sizeof(FLAC__uint64) <= sizeof(buffer));
2284 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2285 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2286 if(read_cb(block->media_catalog_number, 1, len, handle) != len)
2287 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2289 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2290 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2291 if(read_cb(buffer, 1, len, handle) != len)
2292 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2293 block->lead_in = unpack_uint64_(buffer, len);
2295 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2296 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2297 if(read_cb(buffer, 1, len, handle) != len)
2298 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2299 block->is_cd = buffer[0]&0x80? true : false;
2301 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2302 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2303 if(read_cb(buffer, 1, len, handle) != len)
2304 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2305 block->num_tracks = unpack_uint32_(buffer, len);
2307 if(block->num_tracks == 0) {
2310 else if(0 == (block->tracks = (FLAC__StreamMetadata_CueSheet_Track*)calloc(block->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track))))
2311 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2313 for(i = 0; i < block->num_tracks; i++) {
2314 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_cuesheet_track_cb_(handle, read_cb, block->tracks + i)))
2318 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2321 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)
2323 FLAC__byte buffer[sizeof(FLAC__uint32)];
2325 FLAC__ASSERT(0 != data);
2326 FLAC__ASSERT(length_len%8 == 0);
2328 length_len /= 8; /* convert to bytes */
2330 FLAC__ASSERT(sizeof(buffer) >= length_len);
2332 if(read_cb(buffer, 1, length_len, handle) != length_len)
2333 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2334 *length = unpack_uint32_(buffer, length_len);
2339 if(0 == (*data = (FLAC__byte*)malloc(*length+1)))
2340 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2343 if(read_cb(*data, 1, *length, handle) != *length)
2344 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2347 (*data)[*length] = '\0';
2349 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2352 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block)
2354 FLAC__Metadata_SimpleIteratorStatus status;
2355 FLAC__byte buffer[4]; /* asserted below that this is big enough */
2358 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2359 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2360 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2361 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2362 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2364 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_TYPE_LEN % 8 == 0);
2365 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN / 8;
2366 if(read_cb(buffer, 1, len, handle) != len)
2367 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2368 block->type = (FLAC__StreamMetadata_Picture_Type)unpack_uint32_(buffer, len);
2370 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)
2373 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)
2376 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN % 8 == 0);
2377 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN / 8;
2378 if(read_cb(buffer, 1, len, handle) != len)
2379 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2380 block->width = unpack_uint32_(buffer, len);
2382 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN % 8 == 0);
2383 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN / 8;
2384 if(read_cb(buffer, 1, len, handle) != len)
2385 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2386 block->height = unpack_uint32_(buffer, len);
2388 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN % 8 == 0);
2389 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN / 8;
2390 if(read_cb(buffer, 1, len, handle) != len)
2391 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2392 block->depth = unpack_uint32_(buffer, len);
2394 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_COLORS_LEN % 8 == 0);
2395 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN / 8;
2396 if(read_cb(buffer, 1, len, handle) != len)
2397 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2398 block->colors = unpack_uint32_(buffer, len);
2400 /* for convenience we use read_metadata_block_data_picture_cstring_cb_() even though it adds an extra terminating NUL we don't use */
2401 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)
2404 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2407 FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2409 if(block_length == 0) {
2413 if(0 == (block->data = (FLAC__byte*)malloc(block_length)))
2414 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2416 if(read_cb(block->data, 1, block_length, handle) != block_length)
2417 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2420 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2423 FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2425 FLAC__ASSERT(0 != file);
2426 FLAC__ASSERT(0 != status);
2428 if(!write_metadata_block_header_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2429 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2436 FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2438 FLAC__ASSERT(0 != file);
2439 FLAC__ASSERT(0 != status);
2441 if (write_metadata_block_data_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2442 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2446 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2451 FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2453 FLAC__byte buffer[FLAC__STREAM_METADATA_HEADER_LENGTH];
2455 FLAC__ASSERT(block->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
2457 buffer[0] = (block->is_last? 0x80 : 0) | (FLAC__byte)block->type;
2458 pack_uint32_(block->length, buffer + 1, 3);
2460 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2466 FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2468 FLAC__ASSERT(0 != block);
2470 switch(block->type) {
2471 case FLAC__METADATA_TYPE_STREAMINFO:
2472 return write_metadata_block_data_streaminfo_cb_(handle, write_cb, &block->data.stream_info);
2473 case FLAC__METADATA_TYPE_PADDING:
2474 return write_metadata_block_data_padding_cb_(handle, write_cb, &block->data.padding, block->length);
2475 case FLAC__METADATA_TYPE_APPLICATION:
2476 return write_metadata_block_data_application_cb_(handle, write_cb, &block->data.application, block->length);
2477 case FLAC__METADATA_TYPE_SEEKTABLE:
2478 return write_metadata_block_data_seektable_cb_(handle, write_cb, &block->data.seek_table);
2479 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2480 return write_metadata_block_data_vorbis_comment_cb_(handle, write_cb, &block->data.vorbis_comment);
2481 case FLAC__METADATA_TYPE_CUESHEET:
2482 return write_metadata_block_data_cuesheet_cb_(handle, write_cb, &block->data.cue_sheet);
2483 case FLAC__METADATA_TYPE_PICTURE:
2484 return write_metadata_block_data_picture_cb_(handle, write_cb, &block->data.picture);
2486 return write_metadata_block_data_unknown_cb_(handle, write_cb, &block->data.unknown, block->length);
2490 FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block)
2492 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH];
2493 const unsigned channels1 = block->channels - 1;
2494 const unsigned bps1 = block->bits_per_sample - 1;
2496 /* we are using hardcoded numbers for simplicity but we should
2497 * probably eventually write a bit-level packer and use the
2498 * _STREAMINFO_ constants.
2500 pack_uint32_(block->min_blocksize, buffer, 2);
2501 pack_uint32_(block->max_blocksize, buffer+2, 2);
2502 pack_uint32_(block->min_framesize, buffer+4, 3);
2503 pack_uint32_(block->max_framesize, buffer+7, 3);
2504 buffer[10] = (block->sample_rate >> 12) & 0xff;
2505 buffer[11] = (block->sample_rate >> 4) & 0xff;
2506 buffer[12] = ((block->sample_rate & 0x0f) << 4) | (channels1 << 1) | (bps1 >> 4);
2507 buffer[13] = (FLAC__byte)(((bps1 & 0x0f) << 4) | ((block->total_samples >> 32) & 0x0f));
2508 pack_uint32_((FLAC__uint32)block->total_samples, buffer+14, 4);
2509 memcpy(buffer+18, block->md5sum, 16);
2511 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2517 FLAC__bool write_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Padding *block, unsigned block_length)
2519 unsigned i, n = block_length;
2520 FLAC__byte buffer[1024];
2524 memset(buffer, 0, 1024);
2526 for(i = 0; i < n/1024; i++)
2527 if(write_cb(buffer, 1, 1024, handle) != 1024)
2532 if(write_cb(buffer, 1, n, handle) != n)
2538 FLAC__bool write_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Application *block, unsigned block_length)
2540 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2542 if(write_cb(block->id, 1, id_bytes, handle) != id_bytes)
2545 block_length -= id_bytes;
2547 if(write_cb(block->data, 1, block_length, handle) != block_length)
2553 FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block)
2556 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2558 for(i = 0; i < block->num_points; i++) {
2559 /* some MAGIC NUMBERs here */
2560 pack_uint64_(block->points[i].sample_number, buffer, 8);
2561 pack_uint64_(block->points[i].stream_offset, buffer+8, 8);
2562 pack_uint32_(block->points[i].frame_samples, buffer+16, 2);
2563 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2570 FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block)
2573 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2574 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2575 FLAC__byte buffer[4]; /* magic number is asserted below */
2577 FLAC__ASSERT(max(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN, FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8 == sizeof(buffer));
2579 pack_uint32_little_endian_(block->vendor_string.length, buffer, entry_length_len);
2580 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2582 if(write_cb(block->vendor_string.entry, 1, block->vendor_string.length, handle) != block->vendor_string.length)
2585 pack_uint32_little_endian_(block->num_comments, buffer, num_comments_len);
2586 if(write_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2589 for(i = 0; i < block->num_comments; i++) {
2590 pack_uint32_little_endian_(block->comments[i].length, buffer, entry_length_len);
2591 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2593 if(write_cb(block->comments[i].entry, 1, block->comments[i].length, handle) != block->comments[i].length)
2600 FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block)
2603 FLAC__byte buffer[1024]; /* asserted below that this is big enough */
2605 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2606 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN/8);
2607 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);
2608 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2610 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2611 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2612 if(write_cb(block->media_catalog_number, 1, len, handle) != len)
2615 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2616 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2617 pack_uint64_(block->lead_in, buffer, len);
2618 if(write_cb(buffer, 1, len, handle) != len)
2621 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2622 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2623 memset(buffer, 0, len);
2626 if(write_cb(buffer, 1, len, handle) != len)
2629 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2630 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2631 pack_uint32_(block->num_tracks, buffer, len);
2632 if(write_cb(buffer, 1, len, handle) != len)
2635 for(i = 0; i < block->num_tracks; i++) {
2636 FLAC__StreamMetadata_CueSheet_Track *track = block->tracks + i;
2638 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2639 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2640 pack_uint64_(track->offset, buffer, len);
2641 if(write_cb(buffer, 1, len, handle) != len)
2644 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2645 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2646 pack_uint32_(track->number, buffer, len);
2647 if(write_cb(buffer, 1, len, handle) != len)
2650 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2651 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2652 if(write_cb(track->isrc, 1, len, handle) != len)
2655 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);
2656 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2657 memset(buffer, 0, len);
2658 buffer[0] = (track->type << 7) | (track->pre_emphasis << 6);
2659 if(write_cb(buffer, 1, len, handle) != len)
2662 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2663 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2664 pack_uint32_(track->num_indices, buffer, len);
2665 if(write_cb(buffer, 1, len, handle) != len)
2668 for(j = 0; j < track->num_indices; j++) {
2669 FLAC__StreamMetadata_CueSheet_Index *index = track->indices + j;
2671 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2672 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2673 pack_uint64_(index->offset, buffer, len);
2674 if(write_cb(buffer, 1, len, handle) != len)
2677 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2678 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2679 pack_uint32_(index->number, buffer, len);
2680 if(write_cb(buffer, 1, len, handle) != len)
2683 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2684 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2685 memset(buffer, 0, len);
2686 if(write_cb(buffer, 1, len, handle) != len)
2694 FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block)
2698 FLAC__byte buffer[4]; /* magic number is asserted below */
2700 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_TYPE_LEN%8);
2701 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN%8);
2702 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN%8);
2703 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN%8);
2704 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN%8);
2705 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN%8);
2706 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_COLORS_LEN%8);
2707 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN%8);
2708 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2709 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8);
2710 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8);
2711 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2712 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2713 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2714 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2715 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8);
2717 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8;
2718 pack_uint32_(block->type, buffer, len);
2719 if(write_cb(buffer, 1, len, handle) != len)
2722 len = FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8;
2723 slen = strlen(block->mime_type);
2724 pack_uint32_(slen, buffer, len);
2725 if(write_cb(buffer, 1, len, handle) != len)
2727 if(write_cb(block->mime_type, 1, slen, handle) != slen)
2730 len = FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8;
2731 slen = strlen((const char *)block->description);
2732 pack_uint32_(slen, buffer, len);
2733 if(write_cb(buffer, 1, len, handle) != len)
2735 if(write_cb(block->description, 1, slen, handle) != slen)
2738 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8;
2739 pack_uint32_(block->width, buffer, len);
2740 if(write_cb(buffer, 1, len, handle) != len)
2743 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8;
2744 pack_uint32_(block->height, buffer, len);
2745 if(write_cb(buffer, 1, len, handle) != len)
2748 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8;
2749 pack_uint32_(block->depth, buffer, len);
2750 if(write_cb(buffer, 1, len, handle) != len)
2753 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8;
2754 pack_uint32_(block->colors, buffer, len);
2755 if(write_cb(buffer, 1, len, handle) != len)
2758 len = FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8;
2759 pack_uint32_(block->data_length, buffer, len);
2760 if(write_cb(buffer, 1, len, handle) != len)
2762 if(write_cb(block->data, 1, block->data_length, handle) != block->data_length)
2768 FLAC__bool write_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2770 if(write_cb(block->data, 1, block_length, handle) != block_length)
2776 FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block)
2778 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2779 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2783 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2786 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2789 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2790 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2794 return read_metadata_block_header_(iterator);
2797 FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last)
2799 FLAC__StreamMetadata *padding;
2801 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2802 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2806 block->is_last = false;
2808 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2811 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2814 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
2815 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2817 padding->is_last = padding_is_last;
2818 padding->length = padding_length;
2820 if(!write_metadata_block_header_(iterator->file, &iterator->status, padding)) {
2821 FLAC__metadata_object_delete(padding);
2825 if(!write_metadata_block_data_(iterator->file, &iterator->status, padding)) {
2826 FLAC__metadata_object_delete(padding);
2830 FLAC__metadata_object_delete(padding);
2832 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2833 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2837 return read_metadata_block_header_(iterator);
2840 FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append)
2844 int fixup_is_last_code = 0; /* 0 => no need to change any is_last flags */
2845 off_t fixup_is_last_flag_offset = -1;
2847 FLAC__ASSERT(0 != block || append == false);
2849 if(iterator->is_last) {
2851 fixup_is_last_code = 1; /* 1 => clear the is_last flag at the following offset */
2852 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2854 else if(0 == block) {
2855 simple_iterator_push_(iterator);
2856 if(!FLAC__metadata_simple_iterator_prev(iterator)) {
2857 (void)simple_iterator_pop_(iterator);
2860 fixup_is_last_code = -1; /* -1 => set the is_last the flag at the following offset */
2861 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
2862 if(!simple_iterator_pop_(iterator))
2867 if(!simple_iterator_copy_file_prefix_(iterator, &tempfile, &tempfilename, append))
2871 if(!write_metadata_block_header_(tempfile, &iterator->status, block)) {
2872 cleanup_tempfile_(&tempfile, &tempfilename);
2876 if(!write_metadata_block_data_(tempfile, &iterator->status, block)) {
2877 cleanup_tempfile_(&tempfile, &tempfilename);
2882 if(!simple_iterator_copy_file_postfix_(iterator, &tempfile, &tempfilename, fixup_is_last_code, fixup_is_last_flag_offset, block==0))
2886 return FLAC__metadata_simple_iterator_next(iterator);
2891 void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator)
2893 FLAC__ASSERT(iterator->depth+1 < SIMPLE_ITERATOR_MAX_PUSH_DEPTH);
2894 iterator->offset[iterator->depth+1] = iterator->offset[iterator->depth];
2898 FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator)
2900 FLAC__ASSERT(iterator->depth > 0);
2902 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2903 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2907 return read_metadata_block_header_(iterator);
2914 * 3: not a FLAC file
2916 unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb)
2918 FLAC__byte buffer[4];
2922 FLAC__ASSERT(FLAC__STREAM_SYNC_LENGTH == sizeof(buffer));
2924 /* skip any id3v2 tag */
2926 n = read_cb(buffer, 1, 4, handle);
2931 else if(0 == memcmp(buffer, "ID3", 3)) {
2932 unsigned tag_length = 0;
2934 /* skip to the tag length */
2935 if(seek_cb(handle, 2, SEEK_CUR) < 0)
2938 /* read the length */
2939 for(i = 0; i < 4; i++) {
2940 if(read_cb(buffer, 1, 1, handle) < 1 || buffer[0] & 0x80)
2943 tag_length |= (buffer[0] & 0x7f);
2946 /* skip the rest of the tag */
2947 if(seek_cb(handle, tag_length, SEEK_CUR) < 0)
2950 /* read the stream sync code */
2952 n = read_cb(buffer, 1, 4, handle);
2959 /* check for the fLaC signature */
2960 if(0 == memcmp(FLAC__STREAM_SYNC_STRING, buffer, FLAC__STREAM_SYNC_LENGTH))
2966 unsigned seek_to_first_metadata_block_(FILE *f)
2968 return seek_to_first_metadata_block_cb_((FLAC__IOHandle)f, (FLAC__IOCallback_Read)fread, fseek_wrapper_);
2971 FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append)
2973 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];
2975 if(0 != fseeko(iterator->file, 0, SEEK_SET)) {
2976 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2979 if(!open_tempfile_(iterator->filename, iterator->tempfile_path_prefix, tempfile, tempfilename, &iterator->status)) {
2980 cleanup_tempfile_(tempfile, tempfilename);
2983 if(!copy_n_bytes_from_file_(iterator->file, *tempfile, offset_end, &iterator->status)) {
2984 cleanup_tempfile_(tempfile, tempfilename);
2991 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)
2993 off_t save_offset = iterator->offset[iterator->depth];
2994 FLAC__ASSERT(0 != *tempfile);
2996 if(0 != fseeko(iterator->file, save_offset + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length, SEEK_SET)) {
2997 cleanup_tempfile_(tempfile, tempfilename);
2998 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3001 if(!copy_remaining_bytes_from_file_(iterator->file, *tempfile, &iterator->status)) {
3002 cleanup_tempfile_(tempfile, tempfilename);
3006 if(fixup_is_last_code != 0) {
3008 * if code == 1, it means a block was appended to the end so
3009 * we have to clear the is_last flag of the previous block
3010 * if code == -1, it means the last block was deleted so
3011 * we have to set the is_last flag of the previous block
3013 /* MAGIC NUMBERs here; we know the is_last flag is the high bit of the byte at this location */
3015 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3016 cleanup_tempfile_(tempfile, tempfilename);
3017 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3020 if(fread(&x, 1, 1, *tempfile) != 1) {
3021 cleanup_tempfile_(tempfile, tempfilename);
3022 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3025 if(fixup_is_last_code > 0) {
3026 FLAC__ASSERT(x & 0x80);
3030 FLAC__ASSERT(!(x & 0x80));
3033 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3034 cleanup_tempfile_(tempfile, tempfilename);
3035 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3038 if(local__fwrite(&x, 1, 1, *tempfile) != 1) {
3039 cleanup_tempfile_(tempfile, tempfilename);
3040 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3045 (void)fclose(iterator->file);
3047 if(!transport_tempfile_(iterator->filename, tempfile, tempfilename, &iterator->status))
3050 if(iterator->has_stats)
3051 set_file_stats_(iterator->filename, &iterator->stats);
3053 if(!simple_iterator_prime_input_(iterator, !iterator->is_writable))
3056 while(iterator->offset[iterator->depth] + (off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (off_t)iterator->length < save_offset)
3057 if(!FLAC__metadata_simple_iterator_next(iterator))
3062 /* move the iterator to it's original block faster by faking a push, then doing a pop_ */
3063 FLAC__ASSERT(iterator->depth == 0);
3064 iterator->offset[0] = save_offset;
3066 return simple_iterator_pop_(iterator);
3070 FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status)
3072 FLAC__byte buffer[8192];
3075 FLAC__ASSERT(bytes >= 0);
3077 n = min(sizeof(buffer), (size_t)bytes);
3078 if(fread(buffer, 1, n, file) != n) {
3079 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3082 if(local__fwrite(buffer, 1, n, tempfile) != n) {
3083 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3092 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)
3094 FLAC__byte buffer[8192];
3097 FLAC__ASSERT(bytes >= 0);
3099 n = min(sizeof(buffer), (size_t)bytes);
3100 if(read_cb(buffer, 1, n, handle) != n) {
3101 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3104 if(temp_write_cb(buffer, 1, n, temp_handle) != n) {
3105 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3114 FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status)
3116 FLAC__byte buffer[8192];
3119 while(!feof(file)) {
3120 n = fread(buffer, 1, sizeof(buffer), file);
3121 if(n == 0 && !feof(file)) {
3122 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3125 if(n > 0 && local__fwrite(buffer, 1, n, tempfile) != n) {
3126 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3134 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)
3136 FLAC__byte buffer[8192];
3139 while(!eof_cb(handle)) {
3140 n = read_cb(buffer, 1, sizeof(buffer), handle);
3141 if(n == 0 && !eof_cb(handle)) {
3142 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3145 if(n > 0 && temp_write_cb(buffer, 1, n, temp_handle) != n) {
3146 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3154 FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3156 static const char *tempfile_suffix = ".metadata_edit";
3157 if(0 == tempfile_path_prefix) {
3158 if(0 == (*tempfilename = (char*)malloc(strlen(filename) + strlen(tempfile_suffix) + 1))) {
3159 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3162 strcpy(*tempfilename, filename);
3163 strcat(*tempfilename, tempfile_suffix);
3166 const char *p = strrchr(filename, '/');
3172 if(0 == (*tempfilename = (char*)malloc(strlen(tempfile_path_prefix) + 1 + strlen(p) + strlen(tempfile_suffix) + 1))) {
3173 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3176 strcpy(*tempfilename, tempfile_path_prefix);
3177 strcat(*tempfilename, "/");
3178 strcat(*tempfilename, p);
3179 strcat(*tempfilename, tempfile_suffix);
3182 if(0 == (*tempfile = fopen(*tempfilename, "w+b"))) {
3183 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
3190 FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3192 FLAC__ASSERT(0 != filename);
3193 FLAC__ASSERT(0 != tempfile);
3194 FLAC__ASSERT(0 != *tempfile);
3195 FLAC__ASSERT(0 != tempfilename);
3196 FLAC__ASSERT(0 != *tempfilename);
3197 FLAC__ASSERT(0 != status);
3199 (void)fclose(*tempfile);
3202 #if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__ || defined __EMX__
3203 /* on some flavors of windows, rename() will fail if the destination already exists */
3204 if(unlink(filename) < 0) {
3205 cleanup_tempfile_(tempfile, tempfilename);
3206 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR;
3211 /*@@@ to fully support the tempfile_path_prefix we need to update this piece to actually copy across filesystems instead of just rename(): */
3212 if(0 != rename(*tempfilename, filename)) {
3213 cleanup_tempfile_(tempfile, tempfilename);
3214 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR;
3218 cleanup_tempfile_(tempfile, tempfilename);
3223 void cleanup_tempfile_(FILE **tempfile, char **tempfilename)
3225 if(0 != *tempfile) {
3226 (void)fclose(*tempfile);
3230 if(0 != *tempfilename) {
3231 (void)unlink(*tempfilename);
3232 free(*tempfilename);
3237 FLAC__bool get_file_stats_(const char *filename, struct stat *stats)
3239 FLAC__ASSERT(0 != filename);
3240 FLAC__ASSERT(0 != stats);
3241 return (0 == stat(filename, stats));
3244 void set_file_stats_(const char *filename, struct stat *stats)
3246 struct utimbuf srctime;
3248 FLAC__ASSERT(0 != filename);
3249 FLAC__ASSERT(0 != stats);
3251 srctime.actime = stats->st_atime;
3252 srctime.modtime = stats->st_mtime;
3253 (void)chmod(filename, stats->st_mode);
3254 (void)utime(filename, &srctime);
3255 #if !defined _MSC_VER && !defined __BORLANDC__ && !defined __MINGW32__ && !defined __EMX__
3256 (void)chown(filename, stats->st_uid, -1);
3257 (void)chown(filename, -1, stats->st_gid);
3261 int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence)
3263 return fseeko((FILE*)handle, (off_t)offset, whence);
3266 FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle)
3268 return ftello((FILE*)handle);
3271 FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status)
3274 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK:
3275 return FLAC__METADATA_CHAIN_STATUS_OK;
3276 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT:
3277 return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT;
3278 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE:
3279 return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
3280 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE:
3281 return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
3282 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE:
3283 return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE;
3284 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA:
3285 return FLAC__METADATA_CHAIN_STATUS_BAD_METADATA;
3286 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR:
3287 return FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
3288 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR:
3289 return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
3290 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR:
3291 return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
3292 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR:
3293 return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR;
3294 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR:
3295 return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR;
3296 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR:
3297 return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
3298 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR:
3300 return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;