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HLE: Merge HLE BIOS improvements from upstream
[pcsx_rearmed.git] / deps / flac-1.3.2 / src / libFLAC / metadata_iterators.c
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ce188d4d 1/* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2001-2009 Josh Coalson
3 * Copyright (C) 2011-2016 Xiph.Org Foundation
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * - Neither the name of the Xiph.org Foundation nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#ifdef HAVE_CONFIG_H
34# include <config.h>
35#endif
36
37#include <errno.h>
38#include <stdio.h>
39#include <stdlib.h>
40#include <string.h>
41#include <stdarg.h>
42
43#include <sys/stat.h> /* for stat(), maybe chmod() */
44
45#include "private/metadata.h"
46
47#include "FLAC/assert.h"
48#include "FLAC/stream_decoder.h"
49#include "share/alloc.h"
50#include "share/compat.h"
51#include "share/macros.h"
52#include "share/safe_str.h"
53#include "private/macros.h"
54#include "private/memory.h"
55
56/* Alias the first (in share/alloc.h) to the second (in src/libFLAC/memory.c). */
57#define safe_malloc_mul_2op_ safe_malloc_mul_2op_p
58
59/****************************************************************************
60 *
61 * Local function declarations
62 *
63 ***************************************************************************/
64
65static void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
66static void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes);
67static void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes);
68static FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes);
69static FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes);
70static FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes);
71
72static FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator);
73static FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block);
74static FLAC__bool read_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__bool *is_last, FLAC__MetadataType *type, unsigned *length);
75static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata *block);
76static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block);
77static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_Padding *block, unsigned block_length);
78static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Application *block, unsigned block_length);
79static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_SeekTable *block, unsigned block_length);
80static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment_Entry *entry, unsigned max_length);
81static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_VorbisComment *block, unsigned block_length);
82static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track);
83static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block);
84static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block);
85static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Unknown *block, unsigned block_length);
86
87static FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
88static FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block);
89static FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
90static FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block);
91static FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block);
92static FLAC__bool write_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Padding *block, unsigned block_length);
93static FLAC__bool write_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Application *block, unsigned block_length);
94static FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block);
95static FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block);
96static FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block);
97static FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block);
98static FLAC__bool write_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Unknown *block, unsigned block_length);
99
100static FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block);
101static FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last);
102static FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append);
103
104static void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator);
105static FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator);
106
107static unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb);
108static unsigned seek_to_first_metadata_block_(FILE *f);
109
110static FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append);
111static FLAC__bool simple_iterator_copy_file_postfix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, int fixup_is_last_code, FLAC__off_t fixup_is_last_flag_offset, FLAC__bool backup);
112
113static FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status);
114static 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, FLAC__off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status);
115static FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status);
116static 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);
117
118static FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
119static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status);
120static void cleanup_tempfile_(FILE **tempfile, char **tempfilename);
121
122static FLAC__bool get_file_stats_(const char *filename, struct flac_stat_s *stats);
123static void set_file_stats_(const char *filename, struct flac_stat_s *stats);
124
125static int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence);
126static FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle);
127
128static FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status);
129
130
131#ifdef FLAC__VALGRIND_TESTING
132static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
133{
134 size_t ret = fwrite(ptr, size, nmemb, stream);
135 if(!ferror(stream))
136 fflush(stream);
137 return ret;
138}
139#else
140#define local__fwrite fwrite
141#endif
142
143/****************************************************************************
144 *
145 * Level 0 implementation
146 *
147 ***************************************************************************/
148
149static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
150static void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
151static void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
152
153typedef struct {
154 FLAC__bool got_error;
155 FLAC__StreamMetadata *object;
156} level0_client_data;
157
158static FLAC__StreamMetadata *get_one_metadata_block_(const char *filename, FLAC__MetadataType type)
159{
160 level0_client_data cd;
161 FLAC__StreamDecoder *decoder;
162
163 FLAC__ASSERT(0 != filename);
164
165 cd.got_error = false;
166 cd.object = 0;
167
168 decoder = FLAC__stream_decoder_new();
169
170 if(0 == decoder)
171 return 0;
172
173 FLAC__stream_decoder_set_md5_checking(decoder, false);
174 FLAC__stream_decoder_set_metadata_ignore_all(decoder);
175 FLAC__stream_decoder_set_metadata_respond(decoder, type);
176
177 if(FLAC__stream_decoder_init_file(decoder, filename, write_callback_, metadata_callback_, error_callback_, &cd) != FLAC__STREAM_DECODER_INIT_STATUS_OK || cd.got_error) {
178 (void)FLAC__stream_decoder_finish(decoder);
179 FLAC__stream_decoder_delete(decoder);
180 return 0;
181 }
182
183 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder) || cd.got_error) {
184 (void)FLAC__stream_decoder_finish(decoder);
185 FLAC__stream_decoder_delete(decoder);
186 if(0 != cd.object)
187 FLAC__metadata_object_delete(cd.object);
188 return 0;
189 }
190
191 (void)FLAC__stream_decoder_finish(decoder);
192 FLAC__stream_decoder_delete(decoder);
193
194 return cd.object;
195}
196
197FLAC_API FLAC__bool FLAC__metadata_get_streaminfo(const char *filename, FLAC__StreamMetadata *streaminfo)
198{
199 FLAC__StreamMetadata *object;
200
201 FLAC__ASSERT(0 != filename);
202 FLAC__ASSERT(0 != streaminfo);
203
204 object = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_STREAMINFO);
205
206 if (object) {
207 /* can just copy the contents since STREAMINFO has no internal structure */
208 *streaminfo = *object;
209 FLAC__metadata_object_delete(object);
210 return true;
211 }
212 else {
213 return false;
214 }
215}
216
217FLAC_API FLAC__bool FLAC__metadata_get_tags(const char *filename, FLAC__StreamMetadata **tags)
218{
219 FLAC__ASSERT(0 != filename);
220 FLAC__ASSERT(0 != tags);
221
222 *tags = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_VORBIS_COMMENT);
223
224 return 0 != *tags;
225}
226
227FLAC_API FLAC__bool FLAC__metadata_get_cuesheet(const char *filename, FLAC__StreamMetadata **cuesheet)
228{
229 FLAC__ASSERT(0 != filename);
230 FLAC__ASSERT(0 != cuesheet);
231
232 *cuesheet = get_one_metadata_block_(filename, FLAC__METADATA_TYPE_CUESHEET);
233
234 return 0 != *cuesheet;
235}
236
237FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
238{
239 (void)decoder, (void)frame, (void)buffer, (void)client_data;
240
241 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
242}
243
244void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
245{
246 level0_client_data *cd = (level0_client_data *)client_data;
247 (void)decoder;
248
249 /*
250 * we assume we only get here when the one metadata block we were
251 * looking for was passed to us
252 */
253 if(!cd->got_error && 0 == cd->object) {
254 if(0 == (cd->object = FLAC__metadata_object_clone(metadata)))
255 cd->got_error = true;
256 }
257}
258
259void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
260{
261 level0_client_data *cd = (level0_client_data *)client_data;
262 (void)decoder;
263
264 if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
265 cd->got_error = true;
266}
267
268FLAC_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)
269{
270 FLAC__Metadata_SimpleIterator *it;
271 FLAC__uint64 max_area_seen = 0;
272 FLAC__uint64 max_depth_seen = 0;
273
274 FLAC__ASSERT(0 != filename);
275 FLAC__ASSERT(0 != picture);
276
277 *picture = 0;
278
279 it = FLAC__metadata_simple_iterator_new();
280 if(0 == it)
281 return false;
282 if(!FLAC__metadata_simple_iterator_init(it, filename, /*read_only=*/true, /*preserve_file_stats=*/true)) {
283 FLAC__metadata_simple_iterator_delete(it);
284 return false;
285 }
286 do {
287 if(FLAC__metadata_simple_iterator_get_block_type(it) == FLAC__METADATA_TYPE_PICTURE) {
288 FLAC__StreamMetadata *obj = FLAC__metadata_simple_iterator_get_block(it);
289 FLAC__uint64 area = (FLAC__uint64)obj->data.picture.width * (FLAC__uint64)obj->data.picture.height;
290 /* check constraints */
291 if(
292 (type == (FLAC__StreamMetadata_Picture_Type)(-1) || type == obj->data.picture.type) &&
293 (mime_type == 0 || !strcmp(mime_type, obj->data.picture.mime_type)) &&
294 (description == 0 || !strcmp((const char *)description, (const char *)obj->data.picture.description)) &&
295 obj->data.picture.width <= max_width &&
296 obj->data.picture.height <= max_height &&
297 obj->data.picture.depth <= max_depth &&
298 obj->data.picture.colors <= max_colors &&
299 (area > max_area_seen || (area == max_area_seen && obj->data.picture.depth > max_depth_seen))
300 ) {
301 if(*picture)
302 FLAC__metadata_object_delete(*picture);
303 *picture = obj;
304 max_area_seen = area;
305 max_depth_seen = obj->data.picture.depth;
306 }
307 else {
308 FLAC__metadata_object_delete(obj);
309 }
310 }
311 } while(FLAC__metadata_simple_iterator_next(it));
312
313 FLAC__metadata_simple_iterator_delete(it);
314
315 return (0 != *picture);
316}
317
318
319/****************************************************************************
320 *
321 * Level 1 implementation
322 *
323 ***************************************************************************/
324
325#define SIMPLE_ITERATOR_MAX_PUSH_DEPTH (1+4)
326/* 1 for initial offset, +4 for our own personal use */
327
328struct FLAC__Metadata_SimpleIterator {
329 FILE *file;
330 char *filename, *tempfile_path_prefix;
331 struct flac_stat_s stats;
332 FLAC__bool has_stats;
333 FLAC__bool is_writable;
334 FLAC__Metadata_SimpleIteratorStatus status;
335 FLAC__off_t offset[SIMPLE_ITERATOR_MAX_PUSH_DEPTH];
336 FLAC__off_t first_offset; /* this is the offset to the STREAMINFO block */
337 unsigned depth;
338 /* this is the metadata block header of the current block we are pointing to: */
339 FLAC__bool is_last;
340 FLAC__MetadataType type;
341 unsigned length;
342};
343
344FLAC_API const char * const FLAC__Metadata_SimpleIteratorStatusString[] = {
345 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK",
346 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT",
347 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE",
348 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE",
349 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE",
350 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA",
351 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR",
352 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR",
353 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR",
354 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR",
355 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR",
356 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR",
357 "FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR"
358};
359
360
361FLAC_API FLAC__Metadata_SimpleIterator *FLAC__metadata_simple_iterator_new(void)
362{
363 FLAC__Metadata_SimpleIterator *iterator = calloc(1, sizeof(FLAC__Metadata_SimpleIterator));
364
365 if(0 != iterator) {
366 iterator->file = 0;
367 iterator->filename = 0;
368 iterator->tempfile_path_prefix = 0;
369 iterator->has_stats = false;
370 iterator->is_writable = false;
371 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
372 iterator->first_offset = iterator->offset[0] = -1;
373 iterator->depth = 0;
374 }
375
376 return iterator;
377}
378
379static void simple_iterator_free_guts_(FLAC__Metadata_SimpleIterator *iterator)
380{
381 FLAC__ASSERT(0 != iterator);
382
383 if(0 != iterator->file) {
384 fclose(iterator->file);
385 iterator->file = 0;
386 if(iterator->has_stats)
387 set_file_stats_(iterator->filename, &iterator->stats);
388 }
389 if(0 != iterator->filename) {
390 free(iterator->filename);
391 iterator->filename = 0;
392 }
393 if(0 != iterator->tempfile_path_prefix) {
394 free(iterator->tempfile_path_prefix);
395 iterator->tempfile_path_prefix = 0;
396 }
397}
398
399FLAC_API void FLAC__metadata_simple_iterator_delete(FLAC__Metadata_SimpleIterator *iterator)
400{
401 FLAC__ASSERT(0 != iterator);
402
403 simple_iterator_free_guts_(iterator);
404 free(iterator);
405}
406
407FLAC_API FLAC__Metadata_SimpleIteratorStatus FLAC__metadata_simple_iterator_status(FLAC__Metadata_SimpleIterator *iterator)
408{
409 FLAC__Metadata_SimpleIteratorStatus status;
410
411 FLAC__ASSERT(0 != iterator);
412
413 status = iterator->status;
414 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
415 return status;
416}
417
418static FLAC__bool simple_iterator_prime_input_(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool read_only)
419{
420 unsigned ret;
421
422 FLAC__ASSERT(0 != iterator);
423
424 if(read_only || 0 == (iterator->file = flac_fopen(iterator->filename, "r+b"))) {
425 iterator->is_writable = false;
426 if(read_only || errno == EACCES) {
427 if(0 == (iterator->file = flac_fopen(iterator->filename, "rb"))) {
428 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
429 return false;
430 }
431 }
432 else {
433 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
434 return false;
435 }
436 }
437 else {
438 iterator->is_writable = true;
439 }
440
441 ret = seek_to_first_metadata_block_(iterator->file);
442 switch(ret) {
443 case 0:
444 iterator->depth = 0;
445 iterator->first_offset = iterator->offset[iterator->depth] = ftello(iterator->file);
446 return read_metadata_block_header_(iterator);
447 case 1:
448 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
449 return false;
450 case 2:
451 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
452 return false;
453 case 3:
454 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE;
455 return false;
456 default:
457 FLAC__ASSERT(0);
458 return false;
459 }
460}
461
462#if 0
463@@@ If we decide to finish implementing this, put this comment back in metadata.h
464/*
465 * The 'tempfile_path_prefix' allows you to specify a directory where
466 * tempfiles should go. Remember that if your metadata edits cause the
467 * FLAC file to grow, the entire file will have to be rewritten. If
468 * 'tempfile_path_prefix' is NULL, the temp file will be written in the
469 * same directory as the original FLAC file. This makes replacing the
470 * original with the tempfile fast but requires extra space in the same
471 * partition for the tempfile. If space is a problem, you can pass a
472 * directory name belonging to a different partition in
473 * 'tempfile_path_prefix'. Note that you should use the forward slash
474 * '/' as the directory separator. A trailing slash is not needed; it
475 * will be added automatically.
476 */
477FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool preserve_file_stats, const char *tempfile_path_prefix);
478#endif
479
480FLAC_API FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool read_only, FLAC__bool preserve_file_stats)
481{
482 const char *tempfile_path_prefix = 0; /*@@@ search for comments near 'flac_rename(...)' for what it will take to finish implementing this */
483
484 FLAC__ASSERT(0 != iterator);
485 FLAC__ASSERT(0 != filename);
486
487 simple_iterator_free_guts_(iterator);
488
489 if(!read_only && preserve_file_stats)
490 iterator->has_stats = get_file_stats_(filename, &iterator->stats);
491
492 if(0 == (iterator->filename = strdup(filename))) {
493 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
494 return false;
495 }
496 if(0 != tempfile_path_prefix && 0 == (iterator->tempfile_path_prefix = strdup(tempfile_path_prefix))) {
497 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
498 return false;
499 }
500
501 return simple_iterator_prime_input_(iterator, read_only);
502}
503
504FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_writable(const FLAC__Metadata_SimpleIterator *iterator)
505{
506 FLAC__ASSERT(0 != iterator);
507 FLAC__ASSERT(0 != iterator->file);
508
509 return iterator->is_writable;
510}
511
512FLAC_API FLAC__bool FLAC__metadata_simple_iterator_next(FLAC__Metadata_SimpleIterator *iterator)
513{
514 FLAC__ASSERT(0 != iterator);
515 FLAC__ASSERT(0 != iterator->file);
516
517 if(iterator->is_last)
518 return false;
519
520 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
521 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
522 return false;
523 }
524
525 iterator->offset[iterator->depth] = ftello(iterator->file);
526
527 return read_metadata_block_header_(iterator);
528}
529
530FLAC_API FLAC__bool FLAC__metadata_simple_iterator_prev(FLAC__Metadata_SimpleIterator *iterator)
531{
532 FLAC__off_t this_offset;
533
534 FLAC__ASSERT(0 != iterator);
535 FLAC__ASSERT(0 != iterator->file);
536
537 if(iterator->offset[iterator->depth] == iterator->first_offset)
538 return false;
539
540 if(0 != fseeko(iterator->file, iterator->first_offset, SEEK_SET)) {
541 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
542 return false;
543 }
544 this_offset = iterator->first_offset;
545 if(!read_metadata_block_header_(iterator))
546 return false;
547
548 /* we ignore any error from ftello() and catch it in fseeko() */
549 while(ftello(iterator->file) + (FLAC__off_t)iterator->length < iterator->offset[iterator->depth]) {
550 if(0 != fseeko(iterator->file, iterator->length, SEEK_CUR)) {
551 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
552 return false;
553 }
554 this_offset = ftello(iterator->file);
555 if(!read_metadata_block_header_(iterator))
556 return false;
557 }
558
559 iterator->offset[iterator->depth] = this_offset;
560
561 return true;
562}
563
564/*@@@@add to tests*/
565FLAC_API FLAC__bool FLAC__metadata_simple_iterator_is_last(const FLAC__Metadata_SimpleIterator *iterator)
566{
567 FLAC__ASSERT(0 != iterator);
568 FLAC__ASSERT(0 != iterator->file);
569
570 return iterator->is_last;
571}
572
573/*@@@@add to tests*/
574FLAC_API off_t FLAC__metadata_simple_iterator_get_block_offset(const FLAC__Metadata_SimpleIterator *iterator)
575{
576 FLAC__ASSERT(0 != iterator);
577 FLAC__ASSERT(0 != iterator->file);
578
579 return iterator->offset[iterator->depth];
580}
581
582FLAC_API FLAC__MetadataType FLAC__metadata_simple_iterator_get_block_type(const FLAC__Metadata_SimpleIterator *iterator)
583{
584 FLAC__ASSERT(0 != iterator);
585 FLAC__ASSERT(0 != iterator->file);
586
587 return iterator->type;
588}
589
590/*@@@@add to tests*/
591FLAC_API unsigned FLAC__metadata_simple_iterator_get_block_length(const FLAC__Metadata_SimpleIterator *iterator)
592{
593 FLAC__ASSERT(0 != iterator);
594 FLAC__ASSERT(0 != iterator->file);
595
596 return iterator->length;
597}
598
599/*@@@@add to tests*/
600FLAC_API FLAC__bool FLAC__metadata_simple_iterator_get_application_id(FLAC__Metadata_SimpleIterator *iterator, FLAC__byte *id)
601{
602 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
603
604 FLAC__ASSERT(0 != iterator);
605 FLAC__ASSERT(0 != iterator->file);
606 FLAC__ASSERT(0 != id);
607
608 if(iterator->type != FLAC__METADATA_TYPE_APPLICATION) {
609 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
610 return false;
611 }
612
613 if(fread(id, 1, id_bytes, iterator->file) != id_bytes) {
614 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
615 return false;
616 }
617
618 /* back up */
619 if(0 != fseeko(iterator->file, -((int)id_bytes), SEEK_CUR)) {
620 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
621 return false;
622 }
623
624 return true;
625}
626
627FLAC_API FLAC__StreamMetadata *FLAC__metadata_simple_iterator_get_block(FLAC__Metadata_SimpleIterator *iterator)
628{
629 FLAC__StreamMetadata *block = FLAC__metadata_object_new(iterator->type);
630
631 FLAC__ASSERT(0 != iterator);
632 FLAC__ASSERT(0 != iterator->file);
633
634 if(0 != block) {
635 block->is_last = iterator->is_last;
636 block->length = iterator->length;
637
638 if(!read_metadata_block_data_(iterator, block)) {
639 FLAC__metadata_object_delete(block);
640 return 0;
641 }
642
643 /* back up to the beginning of the block data to stay consistent */
644 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH, SEEK_SET)) {
645 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
646 FLAC__metadata_object_delete(block);
647 return 0;
648 }
649 }
650 else
651 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
652
653 return block;
654}
655
656FLAC_API FLAC__bool FLAC__metadata_simple_iterator_set_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
657{
658 FLAC__ASSERT_DECLARATION(FLAC__off_t debug_target_offset = iterator->offset[iterator->depth];)
659 FLAC__bool ret;
660
661 FLAC__ASSERT(0 != iterator);
662 FLAC__ASSERT(0 != iterator->file);
663 FLAC__ASSERT(0 != block);
664
665 if(!iterator->is_writable) {
666 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
667 return false;
668 }
669
670 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO || block->type == FLAC__METADATA_TYPE_STREAMINFO) {
671 if(iterator->type != block->type) {
672 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
673 return false;
674 }
675 }
676
677 block->is_last = iterator->is_last;
678
679 if(iterator->length == block->length)
680 return write_metadata_block_stationary_(iterator, block);
681 else if(iterator->length > block->length) {
682 if(use_padding && iterator->length >= FLAC__STREAM_METADATA_HEADER_LENGTH + block->length) {
683 ret = write_metadata_block_stationary_with_padding_(iterator, block, iterator->length - FLAC__STREAM_METADATA_HEADER_LENGTH - block->length, block->is_last);
684 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
685 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
686 return ret;
687 }
688 else {
689 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
690 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
691 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
692 return ret;
693 }
694 }
695 else /* iterator->length < block->length */ {
696 unsigned padding_leftover = 0;
697 FLAC__bool padding_is_last = false;
698 if(use_padding) {
699 /* first see if we can even use padding */
700 if(iterator->is_last) {
701 use_padding = false;
702 }
703 else {
704 const unsigned extra_padding_bytes_required = block->length - iterator->length;
705 simple_iterator_push_(iterator);
706 if(!FLAC__metadata_simple_iterator_next(iterator)) {
707 (void)simple_iterator_pop_(iterator);
708 return false;
709 }
710 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
711 use_padding = false;
712 }
713 else {
714 if(FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length == extra_padding_bytes_required) {
715 padding_leftover = 0;
716 block->is_last = iterator->is_last;
717 }
718 else if(iterator->length < extra_padding_bytes_required)
719 use_padding = false;
720 else {
721 padding_leftover = FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length - extra_padding_bytes_required;
722 padding_is_last = iterator->is_last;
723 block->is_last = false;
724 }
725 }
726 if(!simple_iterator_pop_(iterator))
727 return false;
728 }
729 }
730 if(use_padding) {
731 if(padding_leftover == 0) {
732 ret = write_metadata_block_stationary_(iterator, block);
733 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
734 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
735 return ret;
736 }
737 else {
738 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
739 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
740 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
741 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
742 return ret;
743 }
744 }
745 else {
746 ret = rewrite_whole_file_(iterator, block, /*append=*/false);
747 FLAC__ASSERT(!ret || iterator->offset[iterator->depth] == debug_target_offset);
748 FLAC__ASSERT(!ret || ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
749 return ret;
750 }
751 }
752}
753
754FLAC_API FLAC__bool FLAC__metadata_simple_iterator_insert_block_after(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool use_padding)
755{
756 unsigned padding_leftover = 0;
757 FLAC__bool padding_is_last = false;
758
759 FLAC__ASSERT_DECLARATION(FLAC__off_t debug_target_offset = iterator->offset[iterator->depth] + FLAC__STREAM_METADATA_HEADER_LENGTH + iterator->length;)
760 FLAC__bool ret;
761
762 FLAC__ASSERT(0 != iterator);
763 FLAC__ASSERT(0 != iterator->file);
764 FLAC__ASSERT(0 != block);
765
766 if(!iterator->is_writable) {
767 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
768 return false;
769 }
770
771 if(block->type == FLAC__METADATA_TYPE_STREAMINFO) {
772 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
773 return false;
774 }
775
776 block->is_last = iterator->is_last;
777
778 if(use_padding) {
779 /* first see if we can even use padding */
780 if(iterator->is_last) {
781 use_padding = false;
782 }
783 else {
784 simple_iterator_push_(iterator);
785 if(!FLAC__metadata_simple_iterator_next(iterator)) {
786 (void)simple_iterator_pop_(iterator);
787 return false;
788 }
789 if(iterator->type != FLAC__METADATA_TYPE_PADDING) {
790 use_padding = false;
791 }
792 else {
793 if(iterator->length == block->length) {
794 padding_leftover = 0;
795 block->is_last = iterator->is_last;
796 }
797 else if(iterator->length < FLAC__STREAM_METADATA_HEADER_LENGTH + block->length)
798 use_padding = false;
799 else {
800 padding_leftover = iterator->length - block->length;
801 padding_is_last = iterator->is_last;
802 block->is_last = false;
803 }
804 }
805 if(!simple_iterator_pop_(iterator))
806 return false;
807 }
808 }
809 if(use_padding) {
810 /* move to the next block, which is suitable padding */
811 if(!FLAC__metadata_simple_iterator_next(iterator))
812 return false;
813 if(padding_leftover == 0) {
814 ret = write_metadata_block_stationary_(iterator, block);
815 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
816 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
817 return ret;
818 }
819 else {
820 FLAC__ASSERT(padding_leftover >= FLAC__STREAM_METADATA_HEADER_LENGTH);
821 ret = write_metadata_block_stationary_with_padding_(iterator, block, padding_leftover - FLAC__STREAM_METADATA_HEADER_LENGTH, padding_is_last);
822 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
823 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
824 return ret;
825 }
826 }
827 else {
828 ret = rewrite_whole_file_(iterator, block, /*append=*/true);
829 FLAC__ASSERT(iterator->offset[iterator->depth] == debug_target_offset);
830 FLAC__ASSERT(ftello(iterator->file) == debug_target_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
831 return ret;
832 }
833}
834
835FLAC_API FLAC__bool FLAC__metadata_simple_iterator_delete_block(FLAC__Metadata_SimpleIterator *iterator, FLAC__bool use_padding)
836{
837 FLAC__ASSERT_DECLARATION(FLAC__off_t debug_target_offset = iterator->offset[iterator->depth];)
838 FLAC__bool ret;
839
840 if(!iterator->is_writable) {
841 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE;
842 return false;
843 }
844
845 if(iterator->type == FLAC__METADATA_TYPE_STREAMINFO) {
846 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT;
847 return false;
848 }
849
850 if(use_padding) {
851 FLAC__StreamMetadata *padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
852 if(0 == padding) {
853 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
854 return false;
855 }
856 padding->length = iterator->length;
857 if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false)) {
858 FLAC__metadata_object_delete(padding);
859 return false;
860 }
861 FLAC__metadata_object_delete(padding);
862 if(!FLAC__metadata_simple_iterator_prev(iterator))
863 return false;
864 FLAC__ASSERT(iterator->offset[iterator->depth] + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length == debug_target_offset);
865 FLAC__ASSERT(ftello(iterator->file) + (FLAC__off_t)iterator->length == debug_target_offset);
866 return true;
867 }
868 else {
869 ret = rewrite_whole_file_(iterator, 0, /*append=*/false);
870 FLAC__ASSERT(iterator->offset[iterator->depth] + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length == debug_target_offset);
871 FLAC__ASSERT(ftello(iterator->file) + (FLAC__off_t)iterator->length == debug_target_offset);
872 return ret;
873 }
874}
875
876
877
878/****************************************************************************
879 *
880 * Level 2 implementation
881 *
882 ***************************************************************************/
883
884
885typedef struct FLAC__Metadata_Node {
886 FLAC__StreamMetadata *data;
887 struct FLAC__Metadata_Node *prev, *next;
888} FLAC__Metadata_Node;
889
890struct FLAC__Metadata_Chain {
891 char *filename; /* will be NULL if using callbacks */
892 FLAC__bool is_ogg;
893 FLAC__Metadata_Node *head;
894 FLAC__Metadata_Node *tail;
895 unsigned nodes;
896 FLAC__Metadata_ChainStatus status;
897 FLAC__off_t first_offset, last_offset;
898 /*
899 * This is the length of the chain initially read from the FLAC file.
900 * it is used to compare against the current length to decide whether
901 * or not the whole file has to be rewritten.
902 */
903 FLAC__off_t initial_length;
904 /* @@@ hacky, these are currently only needed by ogg reader */
905 FLAC__IOHandle handle;
906 FLAC__IOCallback_Read read_cb;
907};
908
909struct FLAC__Metadata_Iterator {
910 FLAC__Metadata_Chain *chain;
911 FLAC__Metadata_Node *current;
912};
913
914FLAC_API const char * const FLAC__Metadata_ChainStatusString[] = {
915 "FLAC__METADATA_CHAIN_STATUS_OK",
916 "FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT",
917 "FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE",
918 "FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE",
919 "FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE",
920 "FLAC__METADATA_CHAIN_STATUS_BAD_METADATA",
921 "FLAC__METADATA_CHAIN_STATUS_READ_ERROR",
922 "FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR",
923 "FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR",
924 "FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR",
925 "FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR",
926 "FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR",
927 "FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR",
928 "FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS",
929 "FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH",
930 "FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL"
931};
932
933
934static FLAC__Metadata_Node *node_new_(void)
935{
936 return calloc(1, sizeof(FLAC__Metadata_Node));
937}
938
939static void node_delete_(FLAC__Metadata_Node *node)
940{
941 FLAC__ASSERT(0 != node);
942 if(0 != node->data)
943 FLAC__metadata_object_delete(node->data);
944 free(node);
945}
946
947static void chain_init_(FLAC__Metadata_Chain *chain)
948{
949 FLAC__ASSERT(0 != chain);
950
951 chain->filename = 0;
952 chain->is_ogg = false;
953 chain->head = chain->tail = 0;
954 chain->nodes = 0;
955 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
956 chain->initial_length = 0;
957 chain->read_cb = 0;
958}
959
960static void chain_clear_(FLAC__Metadata_Chain *chain)
961{
962 FLAC__Metadata_Node *node, *next;
963
964 FLAC__ASSERT(0 != chain);
965
966 for(node = chain->head; node; ) {
967 next = node->next;
968 node_delete_(node);
969 node = next;
970 }
971
972 if(0 != chain->filename)
973 free(chain->filename);
974
975 chain_init_(chain);
976}
977
978static void chain_append_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
979{
980 FLAC__ASSERT(0 != chain);
981 FLAC__ASSERT(0 != node);
982 FLAC__ASSERT(0 != node->data);
983
984 node->next = node->prev = 0;
985 node->data->is_last = true;
986 if(0 != chain->tail)
987 chain->tail->data->is_last = false;
988
989 if(0 == chain->head)
990 chain->head = node;
991 else {
992 FLAC__ASSERT(0 != chain->tail);
993 chain->tail->next = node;
994 node->prev = chain->tail;
995 }
996 chain->tail = node;
997 chain->nodes++;
998}
999
1000static void chain_remove_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1001{
1002 FLAC__ASSERT(0 != chain);
1003 FLAC__ASSERT(0 != node);
1004
1005 if(node == chain->head)
1006 chain->head = node->next;
1007 else
1008 node->prev->next = node->next;
1009
1010 if(node == chain->tail)
1011 chain->tail = node->prev;
1012 else
1013 node->next->prev = node->prev;
1014
1015 if(0 != chain->tail)
1016 chain->tail->data->is_last = true;
1017
1018 chain->nodes--;
1019}
1020
1021static void chain_delete_node_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1022{
1023 chain_remove_node_(chain, node);
1024 node_delete_(node);
1025}
1026
1027static FLAC__off_t chain_calculate_length_(FLAC__Metadata_Chain *chain)
1028{
1029 const FLAC__Metadata_Node *node;
1030 FLAC__off_t length = 0;
1031 for(node = chain->head; node; node = node->next)
1032 length += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1033 return length;
1034}
1035
1036static void iterator_insert_node_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1037{
1038 FLAC__ASSERT(0 != node);
1039 FLAC__ASSERT(0 != node->data);
1040 FLAC__ASSERT(0 != iterator);
1041 FLAC__ASSERT(0 != iterator->current);
1042 FLAC__ASSERT(0 != iterator->chain);
1043 FLAC__ASSERT(0 != iterator->chain->head);
1044 FLAC__ASSERT(0 != iterator->chain->tail);
1045
1046 node->data->is_last = false;
1047
1048 node->prev = iterator->current->prev;
1049 node->next = iterator->current;
1050
1051 if(0 == node->prev)
1052 iterator->chain->head = node;
1053 else
1054 node->prev->next = node;
1055
1056 iterator->current->prev = node;
1057
1058 iterator->chain->nodes++;
1059}
1060
1061static void iterator_insert_node_after_(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Node *node)
1062{
1063 FLAC__ASSERT(0 != node);
1064 FLAC__ASSERT(0 != node->data);
1065 FLAC__ASSERT(0 != iterator);
1066 FLAC__ASSERT(0 != iterator->current);
1067 FLAC__ASSERT(0 != iterator->chain);
1068 FLAC__ASSERT(0 != iterator->chain->head);
1069 FLAC__ASSERT(0 != iterator->chain->tail);
1070
1071 iterator->current->data->is_last = false;
1072
1073 node->prev = iterator->current;
1074 node->next = iterator->current->next;
1075
1076 if(0 == node->next)
1077 iterator->chain->tail = node;
1078 else
1079 node->next->prev = node;
1080
1081 node->prev->next = node;
1082
1083 iterator->chain->tail->data->is_last = true;
1084
1085 iterator->chain->nodes++;
1086}
1087
1088/* return true iff node and node->next are both padding */
1089static FLAC__bool chain_merge_adjacent_padding_(FLAC__Metadata_Chain *chain, FLAC__Metadata_Node *node)
1090{
1091 if(node->data->type == FLAC__METADATA_TYPE_PADDING && 0 != node->next && node->next->data->type == FLAC__METADATA_TYPE_PADDING) {
1092 const unsigned growth = FLAC__STREAM_METADATA_HEADER_LENGTH + node->next->data->length;
1093 node->data->length += growth; /* new block size can be greater than max metadata block size, but it'll be fixed later in chain_prepare_for_write_() */
1094
1095 chain_delete_node_(chain, node->next);
1096 return true;
1097 }
1098 else
1099 return false;
1100}
1101
1102/* Returns the new length of the chain, or 0 if there was an error. */
1103/* WATCHOUT: This can get called multiple times before a write, so
1104 * it should still work when this happens.
1105 */
1106/* WATCHOUT: Make sure to also update the logic in
1107 * FLAC__metadata_chain_check_if_tempfile_needed() if the logic here changes.
1108 */
1109static FLAC__off_t chain_prepare_for_write_(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1110{
1111 FLAC__off_t current_length = chain_calculate_length_(chain);
1112
1113 if(use_padding) {
1114 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1115 if(current_length < chain->initial_length && chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1116 const FLAC__off_t delta = chain->initial_length - current_length;
1117 chain->tail->data->length += delta;
1118 current_length += delta;
1119 FLAC__ASSERT(current_length == chain->initial_length);
1120 }
1121 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1122 else if(current_length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) {
1123 FLAC__StreamMetadata *padding;
1124 FLAC__Metadata_Node *node;
1125 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING))) {
1126 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1127 return 0;
1128 }
1129 padding->length = chain->initial_length - (FLAC__STREAM_METADATA_HEADER_LENGTH + current_length);
1130 if(0 == (node = node_new_())) {
1131 FLAC__metadata_object_delete(padding);
1132 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1133 return 0;
1134 }
1135 node->data = padding;
1136 chain_append_node_(chain, node);
1137 current_length = chain_calculate_length_(chain);
1138 FLAC__ASSERT(current_length == chain->initial_length);
1139 }
1140 /* 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 */
1141 else if(current_length > chain->initial_length) {
1142 const FLAC__off_t delta = current_length - chain->initial_length;
1143 if(chain->tail->data->type == FLAC__METADATA_TYPE_PADDING) {
1144 /* if the delta is exactly the size of the last padding block, remove the padding block */
1145 if((FLAC__off_t)chain->tail->data->length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta) {
1146 chain_delete_node_(chain, chain->tail);
1147 current_length = chain_calculate_length_(chain);
1148 FLAC__ASSERT(current_length == chain->initial_length);
1149 }
1150 /* if there is at least 'delta' bytes of padding, trim the padding down */
1151 else if((FLAC__off_t)chain->tail->data->length >= delta) {
1152 chain->tail->data->length -= delta;
1153 current_length -= delta;
1154 FLAC__ASSERT(current_length == chain->initial_length);
1155 }
1156 }
1157 }
1158 }
1159
1160 /* check sizes of all metadata blocks; reduce padding size if necessary */
1161 {
1162 FLAC__Metadata_Node *node;
1163 for (node = chain->head; node; node = node->next) {
1164 if(node->data->length >= (1u << FLAC__STREAM_METADATA_LENGTH_LEN)) {
1165 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1166 node->data->length = (1u << FLAC__STREAM_METADATA_LENGTH_LEN) - 1;
1167 current_length = chain_calculate_length_(chain);
1168 } else {
1169 chain->status = FLAC__METADATA_CHAIN_STATUS_BAD_METADATA;
1170 return 0;
1171 }
1172 }
1173 }
1174 }
1175
1176 return current_length;
1177}
1178
1179static FLAC__bool chain_read_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__IOCallback_Tell tell_cb)
1180{
1181 FLAC__Metadata_Node *node;
1182
1183 FLAC__ASSERT(0 != chain);
1184
1185 /* we assume we're already at the beginning of the file */
1186
1187 switch(seek_to_first_metadata_block_cb_(handle, read_cb, seek_cb)) {
1188 case 0:
1189 break;
1190 case 1:
1191 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1192 return false;
1193 case 2:
1194 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1195 return false;
1196 case 3:
1197 chain->status = FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
1198 return false;
1199 default:
1200 FLAC__ASSERT(0);
1201 return false;
1202 }
1203
1204 {
1205 FLAC__int64 pos = tell_cb(handle);
1206 if(pos < 0) {
1207 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1208 return false;
1209 }
1210 chain->first_offset = (FLAC__off_t)pos;
1211 }
1212
1213 {
1214 FLAC__bool is_last;
1215 FLAC__MetadataType type;
1216 unsigned length;
1217
1218 do {
1219 node = node_new_();
1220 if(0 == node) {
1221 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1222 return false;
1223 }
1224
1225 if(!read_metadata_block_header_cb_(handle, read_cb, &is_last, &type, &length)) {
1226 node_delete_(node);
1227 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1228 return false;
1229 }
1230
1231 node->data = FLAC__metadata_object_new(type);
1232 if(0 == node->data) {
1233 node_delete_(node);
1234 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1235 return false;
1236 }
1237
1238 node->data->is_last = is_last;
1239 node->data->length = length;
1240
1241 chain->status = get_equivalent_status_(read_metadata_block_data_cb_(handle, read_cb, seek_cb, node->data));
1242 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1243 node_delete_(node);
1244 return false;
1245 }
1246 chain_append_node_(chain, node);
1247 } while(!is_last);
1248 }
1249
1250 {
1251 FLAC__int64 pos = tell_cb(handle);
1252 if(pos < 0) {
1253 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
1254 return false;
1255 }
1256 chain->last_offset = (FLAC__off_t)pos;
1257 }
1258
1259 chain->initial_length = chain_calculate_length_(chain);
1260
1261 return true;
1262}
1263
1264static FLAC__StreamDecoderReadStatus chain_read_ogg_read_cb_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
1265{
1266 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1267 (void)decoder;
1268 if(*bytes > 0 && chain->status == FLAC__METADATA_CHAIN_STATUS_OK) {
1269 *bytes = chain->read_cb(buffer, sizeof(FLAC__byte), *bytes, chain->handle);
1270 if(*bytes == 0)
1271 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
1272 else
1273 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
1274 }
1275 else
1276 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
1277}
1278
1279static FLAC__StreamDecoderWriteStatus chain_read_ogg_write_cb_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
1280{
1281 (void)decoder, (void)frame, (void)buffer, (void)client_data;
1282 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1283}
1284
1285static void chain_read_ogg_metadata_cb_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
1286{
1287 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1288 FLAC__Metadata_Node *node;
1289
1290 (void)decoder;
1291
1292 node = node_new_();
1293 if(0 == node) {
1294 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1295 return;
1296 }
1297
1298 node->data = FLAC__metadata_object_clone(metadata);
1299 if(0 == node->data) {
1300 node_delete_(node);
1301 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1302 return;
1303 }
1304
1305 chain_append_node_(chain, node);
1306}
1307
1308static void chain_read_ogg_error_cb_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1309{
1310 FLAC__Metadata_Chain *chain = (FLAC__Metadata_Chain*)client_data;
1311 (void)decoder, (void)status;
1312 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1313}
1314
1315static FLAC__bool chain_read_ogg_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb)
1316{
1317 FLAC__StreamDecoder *decoder;
1318
1319 FLAC__ASSERT(0 != chain);
1320
1321 /* we assume we're already at the beginning of the file */
1322
1323 chain->handle = handle;
1324 chain->read_cb = read_cb;
1325 if(0 == (decoder = FLAC__stream_decoder_new())) {
1326 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1327 return false;
1328 }
1329 FLAC__stream_decoder_set_metadata_respond_all(decoder);
1330 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) {
1331 FLAC__stream_decoder_delete(decoder);
1332 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1333 return false;
1334 }
1335
1336 chain->first_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1337
1338 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder))
1339 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; /*@@@ maybe needs better error code */
1340 if(chain->status != FLAC__METADATA_CHAIN_STATUS_OK) {
1341 FLAC__stream_decoder_delete(decoder);
1342 return false;
1343 }
1344
1345 FLAC__stream_decoder_delete(decoder);
1346
1347 chain->last_offset = 0; /*@@@ wrong; will need to be set correctly to implement metadata writing for Ogg FLAC */
1348
1349 chain->initial_length = chain_calculate_length_(chain);
1350
1351 return true;
1352}
1353
1354static 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)
1355{
1356 FLAC__Metadata_Node *node;
1357
1358 FLAC__ASSERT(0 != chain);
1359 FLAC__ASSERT(0 != chain->head);
1360
1361 if(0 != seek_cb(handle, chain->first_offset, SEEK_SET)) {
1362 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1363 return false;
1364 }
1365
1366 for(node = chain->head; node; node = node->next) {
1367 if(!write_metadata_block_header_cb_(handle, write_cb, node->data)) {
1368 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1369 return false;
1370 }
1371 if(!write_metadata_block_data_cb_(handle, write_cb, node->data)) {
1372 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1373 return false;
1374 }
1375 }
1376
1377 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1378
1379 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1380 return true;
1381}
1382
1383static FLAC__bool chain_rewrite_metadata_in_place_(FLAC__Metadata_Chain *chain)
1384{
1385 FILE *file;
1386 FLAC__bool ret;
1387
1388 FLAC__ASSERT(0 != chain->filename);
1389
1390 if(0 == (file = flac_fopen(chain->filename, "r+b"))) {
1391 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1392 return false;
1393 }
1394
1395 /* chain_rewrite_metadata_in_place_cb_() sets chain->status for us */
1396 ret = chain_rewrite_metadata_in_place_cb_(chain, (FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, fseek_wrapper_);
1397
1398 fclose(file);
1399
1400 return ret;
1401}
1402
1403static FLAC__bool chain_rewrite_file_(FLAC__Metadata_Chain *chain, const char *tempfile_path_prefix)
1404{
1405 FILE *f, *tempfile = NULL;
1406 char *tempfilename;
1407 FLAC__Metadata_SimpleIteratorStatus status;
1408 const FLAC__Metadata_Node *node;
1409
1410 FLAC__ASSERT(0 != chain);
1411 FLAC__ASSERT(0 != chain->filename);
1412 FLAC__ASSERT(0 != chain->head);
1413
1414 /* copy the file prefix (data up to first metadata block */
1415 if(0 == (f = flac_fopen(chain->filename, "rb"))) {
1416 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1417 return false;
1418 }
1419 if(!open_tempfile_(chain->filename, tempfile_path_prefix, &tempfile, &tempfilename, &status)) {
1420 chain->status = get_equivalent_status_(status);
1421 goto err;
1422 }
1423 if(!copy_n_bytes_from_file_(f, tempfile, chain->first_offset, &status)) {
1424 chain->status = get_equivalent_status_(status);
1425 goto err;
1426 }
1427
1428 /* write the metadata */
1429 for(node = chain->head; node; node = node->next) {
1430 if(!write_metadata_block_header_(tempfile, &status, node->data)) {
1431 chain->status = get_equivalent_status_(status);
1432 goto err;
1433 }
1434 if(!write_metadata_block_data_(tempfile, &status, node->data)) {
1435 chain->status = get_equivalent_status_(status);
1436 goto err;
1437 }
1438 }
1439 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1440
1441 /* copy the file postfix (everything after the metadata) */
1442 if(0 != fseeko(f, chain->last_offset, SEEK_SET)) {
1443 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1444 goto err;
1445 }
1446 if(!copy_remaining_bytes_from_file_(f, tempfile, &status)) {
1447 chain->status = get_equivalent_status_(status);
1448 goto err;
1449 }
1450
1451 /* move the tempfile on top of the original */
1452 (void)fclose(f);
1453 if(!transport_tempfile_(chain->filename, &tempfile, &tempfilename, &status))
1454 return false;
1455
1456 return true;
1457
1458err:
1459 (void)fclose(f);
1460 cleanup_tempfile_(&tempfile, &tempfilename);
1461 return false;
1462}
1463
1464/* assumes 'handle' is already at beginning of file */
1465static 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)
1466{
1467 FLAC__Metadata_SimpleIteratorStatus status;
1468 const FLAC__Metadata_Node *node;
1469
1470 FLAC__ASSERT(0 != chain);
1471 FLAC__ASSERT(0 == chain->filename);
1472 FLAC__ASSERT(0 != chain->head);
1473
1474 /* copy the file prefix (data up to first metadata block */
1475 if(!copy_n_bytes_from_file_cb_(handle, read_cb, temp_handle, temp_write_cb, chain->first_offset, &status)) {
1476 chain->status = get_equivalent_status_(status);
1477 return false;
1478 }
1479
1480 /* write the metadata */
1481 for(node = chain->head; node; node = node->next) {
1482 if(!write_metadata_block_header_cb_(temp_handle, temp_write_cb, node->data)) {
1483 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1484 return false;
1485 }
1486 if(!write_metadata_block_data_cb_(temp_handle, temp_write_cb, node->data)) {
1487 chain->status = FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
1488 return false;
1489 }
1490 }
1491 /*FLAC__ASSERT(fflush(), ftello() == chain->last_offset);*/
1492
1493 /* copy the file postfix (everything after the metadata) */
1494 if(0 != seek_cb(handle, chain->last_offset, SEEK_SET)) {
1495 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1496 return false;
1497 }
1498 if(!copy_remaining_bytes_from_file_cb_(handle, read_cb, eof_cb, temp_handle, temp_write_cb, &status)) {
1499 chain->status = get_equivalent_status_(status);
1500 return false;
1501 }
1502
1503 return true;
1504}
1505
1506FLAC_API FLAC__Metadata_Chain *FLAC__metadata_chain_new(void)
1507{
1508 FLAC__Metadata_Chain *chain = calloc(1, sizeof(FLAC__Metadata_Chain));
1509
1510 if(0 != chain)
1511 chain_init_(chain);
1512
1513 return chain;
1514}
1515
1516FLAC_API void FLAC__metadata_chain_delete(FLAC__Metadata_Chain *chain)
1517{
1518 FLAC__ASSERT(0 != chain);
1519
1520 chain_clear_(chain);
1521
1522 free(chain);
1523}
1524
1525FLAC_API FLAC__Metadata_ChainStatus FLAC__metadata_chain_status(FLAC__Metadata_Chain *chain)
1526{
1527 FLAC__Metadata_ChainStatus status;
1528
1529 FLAC__ASSERT(0 != chain);
1530
1531 status = chain->status;
1532 chain->status = FLAC__METADATA_CHAIN_STATUS_OK;
1533 return status;
1534}
1535
1536static FLAC__bool chain_read_(FLAC__Metadata_Chain *chain, const char *filename, FLAC__bool is_ogg)
1537{
1538 FILE *file;
1539 FLAC__bool ret;
1540
1541 FLAC__ASSERT(0 != chain);
1542 FLAC__ASSERT(0 != filename);
1543
1544 chain_clear_(chain);
1545
1546 if(0 == (chain->filename = strdup(filename))) {
1547 chain->status = FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
1548 return false;
1549 }
1550
1551 chain->is_ogg = is_ogg;
1552
1553 if(0 == (file = flac_fopen(filename, "rb"))) {
1554 chain->status = FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
1555 return false;
1556 }
1557
1558 /* the function also sets chain->status for us */
1559 ret = is_ogg?
1560 chain_read_ogg_cb_(chain, file, (FLAC__IOCallback_Read)fread) :
1561 chain_read_cb_(chain, file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, ftell_wrapper_)
1562 ;
1563
1564 fclose(file);
1565
1566 return ret;
1567}
1568
1569FLAC_API FLAC__bool FLAC__metadata_chain_read(FLAC__Metadata_Chain *chain, const char *filename)
1570{
1571 return chain_read_(chain, filename, /*is_ogg=*/false);
1572}
1573
1574/*@@@@add to tests*/
1575FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg(FLAC__Metadata_Chain *chain, const char *filename)
1576{
1577 return chain_read_(chain, filename, /*is_ogg=*/true);
1578}
1579
1580static FLAC__bool chain_read_with_callbacks_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks, FLAC__bool is_ogg)
1581{
1582 FLAC__bool ret;
1583
1584 FLAC__ASSERT(0 != chain);
1585
1586 chain_clear_(chain);
1587
1588 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.tell) {
1589 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1590 return false;
1591 }
1592
1593 chain->is_ogg = is_ogg;
1594
1595 /* rewind */
1596 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1597 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1598 return false;
1599 }
1600
1601 /* the function also sets chain->status for us */
1602 ret = is_ogg?
1603 chain_read_ogg_cb_(chain, handle, callbacks.read) :
1604 chain_read_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.tell)
1605 ;
1606
1607 return ret;
1608}
1609
1610FLAC_API FLAC__bool FLAC__metadata_chain_read_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1611{
1612 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/false);
1613}
1614
1615/*@@@@add to tests*/
1616FLAC_API FLAC__bool FLAC__metadata_chain_read_ogg_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1617{
1618 return chain_read_with_callbacks_(chain, handle, callbacks, /*is_ogg=*/true);
1619}
1620
1621typedef enum {
1622 LBS_NONE = 0,
1623 LBS_SIZE_CHANGED,
1624 LBS_BLOCK_ADDED,
1625 LBS_BLOCK_REMOVED
1626} LastBlockState;
1627
1628FLAC_API FLAC__bool FLAC__metadata_chain_check_if_tempfile_needed(FLAC__Metadata_Chain *chain, FLAC__bool use_padding)
1629{
1630 /* This does all the same checks that are in chain_prepare_for_write_()
1631 * but doesn't actually alter the chain. Make sure to update the logic
1632 * here if chain_prepare_for_write_() changes.
1633 */
1634 FLAC__off_t current_length;
1635 LastBlockState lbs_state = LBS_NONE;
1636 unsigned lbs_size = 0;
1637
1638 FLAC__ASSERT(0 != chain);
1639
1640 current_length = chain_calculate_length_(chain);
1641
1642 if(use_padding) {
1643 const FLAC__Metadata_Node * const node = chain->tail;
1644 /* if the metadata shrank and the last block is padding, we just extend the last padding block */
1645 if(current_length < chain->initial_length && node->data->type == FLAC__METADATA_TYPE_PADDING) {
1646 lbs_state = LBS_SIZE_CHANGED;
1647 lbs_size = node->data->length + (chain->initial_length - current_length);
1648 }
1649 /* if the metadata shrank more than 4 bytes then there's room to add another padding block */
1650 else if(current_length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH <= chain->initial_length) {
1651 lbs_state = LBS_BLOCK_ADDED;
1652 lbs_size = chain->initial_length - (current_length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH);
1653 }
1654 /* 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 */
1655 else if(current_length > chain->initial_length) {
1656 const FLAC__off_t delta = current_length - chain->initial_length;
1657 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1658 /* if the delta is exactly the size of the last padding block, remove the padding block */
1659 if((FLAC__off_t)node->data->length + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH == delta) {
1660 lbs_state = LBS_BLOCK_REMOVED;
1661 lbs_size = 0;
1662 }
1663 /* if there is at least 'delta' bytes of padding, trim the padding down */
1664 else if((FLAC__off_t)node->data->length >= delta) {
1665 lbs_state = LBS_SIZE_CHANGED;
1666 lbs_size = node->data->length - delta;
1667 }
1668 }
1669 }
1670 }
1671
1672 current_length = 0;
1673 /* check sizes of all metadata blocks; reduce padding size if necessary */
1674 {
1675 const FLAC__Metadata_Node *node;
1676 for(node = chain->head; node; node = node->next) {
1677 unsigned block_len = node->data->length;
1678 if(node == chain->tail) {
1679 if(lbs_state == LBS_BLOCK_REMOVED)
1680 continue;
1681 else if(lbs_state == LBS_SIZE_CHANGED)
1682 block_len = lbs_size;
1683 }
1684 if(block_len >= (1u << FLAC__STREAM_METADATA_LENGTH_LEN)) {
1685 if(node->data->type == FLAC__METADATA_TYPE_PADDING)
1686 block_len = (1u << FLAC__STREAM_METADATA_LENGTH_LEN) - 1;
1687 else
1688 return false /* the return value doesn't matter */;
1689 }
1690 current_length += (FLAC__STREAM_METADATA_HEADER_LENGTH + block_len);
1691 }
1692
1693 if(lbs_state == LBS_BLOCK_ADDED) {
1694 /* test added padding block */
1695 unsigned block_len = lbs_size;
1696 if(block_len >= (1u << FLAC__STREAM_METADATA_LENGTH_LEN))
1697 block_len = (1u << FLAC__STREAM_METADATA_LENGTH_LEN) - 1;
1698 current_length += (FLAC__STREAM_METADATA_HEADER_LENGTH + block_len);
1699 }
1700 }
1701
1702 return (current_length != chain->initial_length);
1703}
1704
1705FLAC_API FLAC__bool FLAC__metadata_chain_write(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats)
1706{
1707 struct flac_stat_s stats;
1708 const char *tempfile_path_prefix = 0;
1709 FLAC__off_t current_length;
1710
1711 FLAC__ASSERT(0 != chain);
1712
1713 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1714 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1715 return false;
1716 }
1717
1718 if (0 == chain->filename) {
1719 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1720 return false;
1721 }
1722
1723 current_length = chain_prepare_for_write_(chain, use_padding);
1724
1725 /* a return value of 0 means there was an error; chain->status is already set */
1726 if (0 == current_length)
1727 return false;
1728
1729 if(preserve_file_stats)
1730 get_file_stats_(chain->filename, &stats);
1731
1732 if(current_length == chain->initial_length) {
1733 if(!chain_rewrite_metadata_in_place_(chain))
1734 return false;
1735 }
1736 else {
1737 if(!chain_rewrite_file_(chain, tempfile_path_prefix))
1738 return false;
1739
1740 /* recompute lengths and offsets */
1741 {
1742 const FLAC__Metadata_Node *node;
1743 chain->initial_length = current_length;
1744 chain->last_offset = chain->first_offset;
1745 for(node = chain->head; node; node = node->next)
1746 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1747 }
1748 }
1749
1750 if(preserve_file_stats)
1751 set_file_stats_(chain->filename, &stats);
1752
1753 return true;
1754}
1755
1756FLAC_API FLAC__bool FLAC__metadata_chain_write_with_callbacks(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks)
1757{
1758 FLAC__off_t current_length;
1759
1760 FLAC__ASSERT(0 != chain);
1761
1762 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1763 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1764 return false;
1765 }
1766
1767 if (0 != chain->filename) {
1768 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1769 return false;
1770 }
1771
1772 if (0 == callbacks.write || 0 == callbacks.seek) {
1773 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1774 return false;
1775 }
1776
1777 if (FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1778 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1779 return false;
1780 }
1781
1782 current_length = chain_prepare_for_write_(chain, use_padding);
1783
1784 /* a return value of 0 means there was an error; chain->status is already set */
1785 if (0 == current_length)
1786 return false;
1787
1788 FLAC__ASSERT(current_length == chain->initial_length);
1789
1790 return chain_rewrite_metadata_in_place_cb_(chain, handle, callbacks.write, callbacks.seek);
1791}
1792
1793FLAC_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)
1794{
1795 FLAC__off_t current_length;
1796
1797 FLAC__ASSERT(0 != chain);
1798
1799 if (chain->is_ogg) { /* cannot write back to Ogg FLAC yet */
1800 chain->status = FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
1801 return false;
1802 }
1803
1804 if (0 != chain->filename) {
1805 chain->status = FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH;
1806 return false;
1807 }
1808
1809 if (0 == callbacks.read || 0 == callbacks.seek || 0 == callbacks.eof) {
1810 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1811 return false;
1812 }
1813 if (0 == temp_callbacks.write) {
1814 chain->status = FLAC__METADATA_CHAIN_STATUS_INVALID_CALLBACKS;
1815 return false;
1816 }
1817
1818 if (!FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
1819 chain->status = FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL;
1820 return false;
1821 }
1822
1823 current_length = chain_prepare_for_write_(chain, use_padding);
1824
1825 /* a return value of 0 means there was an error; chain->status is already set */
1826 if (0 == current_length)
1827 return false;
1828
1829 FLAC__ASSERT(current_length != chain->initial_length);
1830
1831 /* rewind */
1832 if(0 != callbacks.seek(handle, 0, SEEK_SET)) {
1833 chain->status = FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
1834 return false;
1835 }
1836
1837 if(!chain_rewrite_file_cb_(chain, handle, callbacks.read, callbacks.seek, callbacks.eof, temp_handle, temp_callbacks.write))
1838 return false;
1839
1840 /* recompute lengths and offsets */
1841 {
1842 const FLAC__Metadata_Node *node;
1843 chain->initial_length = current_length;
1844 chain->last_offset = chain->first_offset;
1845 for(node = chain->head; node; node = node->next)
1846 chain->last_offset += (FLAC__STREAM_METADATA_HEADER_LENGTH + node->data->length);
1847 }
1848
1849 return true;
1850}
1851
1852FLAC_API void FLAC__metadata_chain_merge_padding(FLAC__Metadata_Chain *chain)
1853{
1854 FLAC__Metadata_Node *node;
1855
1856 FLAC__ASSERT(0 != chain);
1857
1858 for(node = chain->head; node; ) {
1859 if(!chain_merge_adjacent_padding_(chain, node))
1860 node = node->next;
1861 }
1862}
1863
1864FLAC_API void FLAC__metadata_chain_sort_padding(FLAC__Metadata_Chain *chain)
1865{
1866 FLAC__Metadata_Node *node, *save;
1867 unsigned i;
1868
1869 FLAC__ASSERT(0 != chain);
1870
1871 /*
1872 * Don't try and be too smart... this simple algo is good enough for
1873 * the small number of nodes that we deal with.
1874 */
1875 for(i = 0, node = chain->head; i < chain->nodes; i++) {
1876 if(node->data->type == FLAC__METADATA_TYPE_PADDING) {
1877 save = node->next;
1878 chain_remove_node_(chain, node);
1879 chain_append_node_(chain, node);
1880 node = save;
1881 }
1882 else {
1883 node = node->next;
1884 }
1885 }
1886
1887 FLAC__metadata_chain_merge_padding(chain);
1888}
1889
1890
1891FLAC_API FLAC__Metadata_Iterator *FLAC__metadata_iterator_new(void)
1892{
1893 FLAC__Metadata_Iterator *iterator = calloc(1, sizeof(FLAC__Metadata_Iterator));
1894
1895 /* calloc() implies:
1896 iterator->current = 0;
1897 iterator->chain = 0;
1898 */
1899
1900 return iterator;
1901}
1902
1903FLAC_API void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator)
1904{
1905 FLAC__ASSERT(0 != iterator);
1906
1907 free(iterator);
1908}
1909
1910FLAC_API void FLAC__metadata_iterator_init(FLAC__Metadata_Iterator *iterator, FLAC__Metadata_Chain *chain)
1911{
1912 FLAC__ASSERT(0 != iterator);
1913 FLAC__ASSERT(0 != chain);
1914 FLAC__ASSERT(0 != chain->head);
1915
1916 iterator->chain = chain;
1917 iterator->current = chain->head;
1918}
1919
1920FLAC_API FLAC__bool FLAC__metadata_iterator_next(FLAC__Metadata_Iterator *iterator)
1921{
1922 FLAC__ASSERT(0 != iterator);
1923
1924 if(0 == iterator->current || 0 == iterator->current->next)
1925 return false;
1926
1927 iterator->current = iterator->current->next;
1928 return true;
1929}
1930
1931FLAC_API FLAC__bool FLAC__metadata_iterator_prev(FLAC__Metadata_Iterator *iterator)
1932{
1933 FLAC__ASSERT(0 != iterator);
1934
1935 if(0 == iterator->current || 0 == iterator->current->prev)
1936 return false;
1937
1938 iterator->current = iterator->current->prev;
1939 return true;
1940}
1941
1942FLAC_API FLAC__MetadataType FLAC__metadata_iterator_get_block_type(const FLAC__Metadata_Iterator *iterator)
1943{
1944 FLAC__ASSERT(0 != iterator);
1945 FLAC__ASSERT(0 != iterator->current);
1946 FLAC__ASSERT(0 != iterator->current->data);
1947
1948 return iterator->current->data->type;
1949}
1950
1951FLAC_API FLAC__StreamMetadata *FLAC__metadata_iterator_get_block(FLAC__Metadata_Iterator *iterator)
1952{
1953 FLAC__ASSERT(0 != iterator);
1954 FLAC__ASSERT(0 != iterator->current);
1955
1956 return iterator->current->data;
1957}
1958
1959FLAC_API FLAC__bool FLAC__metadata_iterator_set_block(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1960{
1961 FLAC__ASSERT(0 != iterator);
1962 FLAC__ASSERT(0 != block);
1963 return FLAC__metadata_iterator_delete_block(iterator, false) && FLAC__metadata_iterator_insert_block_after(iterator, block);
1964}
1965
1966FLAC_API FLAC__bool FLAC__metadata_iterator_delete_block(FLAC__Metadata_Iterator *iterator, FLAC__bool replace_with_padding)
1967{
1968 FLAC__Metadata_Node *save;
1969
1970 FLAC__ASSERT(0 != iterator);
1971 FLAC__ASSERT(0 != iterator->current);
1972
1973 if(0 == iterator->current->prev) {
1974 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
1975 return false;
1976 }
1977
1978 save = iterator->current->prev;
1979
1980 if(replace_with_padding) {
1981 FLAC__metadata_object_delete_data(iterator->current->data);
1982 iterator->current->data->type = FLAC__METADATA_TYPE_PADDING;
1983 }
1984 else {
1985 chain_delete_node_(iterator->chain, iterator->current);
1986 }
1987
1988 iterator->current = save;
1989 return true;
1990}
1991
1992FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_before(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
1993{
1994 FLAC__Metadata_Node *node;
1995
1996 FLAC__ASSERT(0 != iterator);
1997 FLAC__ASSERT(0 != iterator->current);
1998 FLAC__ASSERT(0 != block);
1999
2000 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
2001 return false;
2002
2003 if(0 == iterator->current->prev) {
2004 FLAC__ASSERT(iterator->current->data->type == FLAC__METADATA_TYPE_STREAMINFO);
2005 return false;
2006 }
2007
2008 if(0 == (node = node_new_()))
2009 return false;
2010
2011 node->data = block;
2012 iterator_insert_node_(iterator, node);
2013 iterator->current = node;
2014 return true;
2015}
2016
2017FLAC_API FLAC__bool FLAC__metadata_iterator_insert_block_after(FLAC__Metadata_Iterator *iterator, FLAC__StreamMetadata *block)
2018{
2019 FLAC__Metadata_Node *node;
2020
2021 FLAC__ASSERT(0 != iterator);
2022 FLAC__ASSERT(0 != iterator->current);
2023 FLAC__ASSERT(0 != block);
2024
2025 if(block->type == FLAC__METADATA_TYPE_STREAMINFO)
2026 return false;
2027
2028 if(0 == (node = node_new_()))
2029 return false;
2030
2031 node->data = block;
2032 iterator_insert_node_after_(iterator, node);
2033 iterator->current = node;
2034 return true;
2035}
2036
2037
2038/****************************************************************************
2039 *
2040 * Local function definitions
2041 *
2042 ***************************************************************************/
2043
2044void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
2045{
2046 unsigned i;
2047
2048 b += bytes;
2049
2050 for(i = 0; i < bytes; i++) {
2051 *(--b) = (FLAC__byte)(val & 0xff);
2052 val >>= 8;
2053 }
2054}
2055
2056void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes)
2057{
2058 unsigned i;
2059
2060 for(i = 0; i < bytes; i++) {
2061 *(b++) = (FLAC__byte)(val & 0xff);
2062 val >>= 8;
2063 }
2064}
2065
2066void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes)
2067{
2068 unsigned i;
2069
2070 b += bytes;
2071
2072 for(i = 0; i < bytes; i++) {
2073 *(--b) = (FLAC__byte)(val & 0xff);
2074 val >>= 8;
2075 }
2076}
2077
2078FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes)
2079{
2080 FLAC__uint32 ret = 0;
2081 unsigned i;
2082
2083 for(i = 0; i < bytes; i++)
2084 ret = (ret << 8) | (FLAC__uint32)(*b++);
2085
2086 return ret;
2087}
2088
2089FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes)
2090{
2091 FLAC__uint32 ret = 0;
2092 unsigned i;
2093
2094 b += bytes;
2095
2096 for(i = 0; i < bytes; i++)
2097 ret = (ret << 8) | (FLAC__uint32)(*--b);
2098
2099 return ret;
2100}
2101
2102FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes)
2103{
2104 FLAC__uint64 ret = 0;
2105 unsigned i;
2106
2107 for(i = 0; i < bytes; i++)
2108 ret = (ret << 8) | (FLAC__uint64)(*b++);
2109
2110 return ret;
2111}
2112
2113FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator)
2114{
2115 FLAC__ASSERT(0 != iterator);
2116 FLAC__ASSERT(0 != iterator->file);
2117
2118 if(!read_metadata_block_header_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, &iterator->is_last, &iterator->type, &iterator->length)) {
2119 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2120 return false;
2121 }
2122
2123 return true;
2124}
2125
2126FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block)
2127{
2128 FLAC__ASSERT(0 != iterator);
2129 FLAC__ASSERT(0 != iterator->file);
2130
2131 iterator->status = read_metadata_block_data_cb_((FLAC__IOHandle)iterator->file, (FLAC__IOCallback_Read)fread, fseek_wrapper_, block);
2132
2133 return (iterator->status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK);
2134}
2135
2136FLAC__bool read_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__bool *is_last, FLAC__MetadataType *type, unsigned *length)
2137{
2138 FLAC__byte raw_header[FLAC__STREAM_METADATA_HEADER_LENGTH];
2139
2140 if(read_cb(raw_header, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2141 return false;
2142
2143 *is_last = raw_header[0] & 0x80? true : false;
2144 *type = (FLAC__MetadataType)(raw_header[0] & 0x7f);
2145 *length = unpack_uint32_(raw_header + 1, 3);
2146
2147 /* Note that we don't check:
2148 * if(iterator->type >= FLAC__METADATA_TYPE_UNDEFINED)
2149 * we just will read in an opaque block
2150 */
2151
2152 return true;
2153}
2154
2155FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata *block)
2156{
2157 switch(block->type) {
2158 case FLAC__METADATA_TYPE_STREAMINFO:
2159 return read_metadata_block_data_streaminfo_cb_(handle, read_cb, &block->data.stream_info);
2160 case FLAC__METADATA_TYPE_PADDING:
2161 return read_metadata_block_data_padding_cb_(handle, seek_cb, &block->data.padding, block->length);
2162 case FLAC__METADATA_TYPE_APPLICATION:
2163 return read_metadata_block_data_application_cb_(handle, read_cb, &block->data.application, block->length);
2164 case FLAC__METADATA_TYPE_SEEKTABLE:
2165 return read_metadata_block_data_seektable_cb_(handle, read_cb, &block->data.seek_table, block->length);
2166 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2167 return read_metadata_block_data_vorbis_comment_cb_(handle, read_cb, seek_cb, &block->data.vorbis_comment, block->length);
2168 case FLAC__METADATA_TYPE_CUESHEET:
2169 return read_metadata_block_data_cuesheet_cb_(handle, read_cb, &block->data.cue_sheet);
2170 case FLAC__METADATA_TYPE_PICTURE:
2171 return read_metadata_block_data_picture_cb_(handle, read_cb, &block->data.picture);
2172 default:
2173 return read_metadata_block_data_unknown_cb_(handle, read_cb, &block->data.unknown, block->length);
2174 }
2175}
2176
2177FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block)
2178{
2179 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH], *b;
2180
2181 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2182 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2183
2184 b = buffer;
2185
2186 /* we are using hardcoded numbers for simplicity but we should
2187 * probably eventually write a bit-level unpacker and use the
2188 * _STREAMINFO_ constants.
2189 */
2190 block->min_blocksize = unpack_uint32_(b, 2); b += 2;
2191 block->max_blocksize = unpack_uint32_(b, 2); b += 2;
2192 block->min_framesize = unpack_uint32_(b, 3); b += 3;
2193 block->max_framesize = unpack_uint32_(b, 3); b += 3;
2194 block->sample_rate = (unpack_uint32_(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4);
2195 block->channels = (unsigned)((b[2] & 0x0e) >> 1) + 1;
2196 block->bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 4) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1;
2197 block->total_samples = (((FLAC__uint64)(b[3] & 0x0f)) << 32) | unpack_uint64_(b+4, 4);
2198 memcpy(block->md5sum, b+8, 16);
2199
2200 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2201}
2202
2203FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_Padding *block, unsigned block_length)
2204{
2205 (void)block; /* nothing to do; we don't care about reading the padding bytes */
2206
2207 if(0 != seek_cb(handle, block_length, SEEK_CUR))
2208 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2209
2210 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2211}
2212
2213FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Application *block, unsigned block_length)
2214{
2215 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2216
2217 if(read_cb(block->id, 1, id_bytes, handle) != id_bytes)
2218 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2219
2220 if(block_length < id_bytes)
2221 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2222
2223 block_length -= id_bytes;
2224
2225 if(block_length == 0) {
2226 block->data = 0;
2227 }
2228 else {
2229 if(0 == (block->data = malloc(block_length)))
2230 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2231
2232 if(read_cb(block->data, 1, block_length, handle) != block_length)
2233 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2234 }
2235
2236 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2237}
2238
2239FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_SeekTable *block, unsigned block_length)
2240{
2241 unsigned i;
2242 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2243
2244 FLAC__ASSERT(block_length % FLAC__STREAM_METADATA_SEEKPOINT_LENGTH == 0);
2245
2246 block->num_points = block_length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
2247
2248 if(block->num_points == 0)
2249 block->points = 0;
2250 else if(0 == (block->points = safe_malloc_mul_2op_p(block->num_points, /*times*/sizeof(FLAC__StreamMetadata_SeekPoint))))
2251 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2252
2253 for(i = 0; i < block->num_points; i++) {
2254 if(read_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2255 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2256 /* some MAGIC NUMBERs here */
2257 block->points[i].sample_number = unpack_uint64_(buffer, 8);
2258 block->points[i].stream_offset = unpack_uint64_(buffer+8, 8);
2259 block->points[i].frame_samples = unpack_uint32_(buffer+16, 2);
2260 }
2261
2262 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2263}
2264
2265FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment_Entry *entry, unsigned max_length)
2266{
2267 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2268 FLAC__byte buffer[4]; /* magic number is asserted below */
2269
2270 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8 == sizeof(buffer));
2271
2272 if(max_length < entry_length_len)
2273 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA;
2274
2275 max_length -= entry_length_len;
2276 if(read_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2277 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2278 entry->length = unpack_uint32_little_endian_(buffer, entry_length_len);
2279 if(max_length < entry->length) {
2280 entry->length = 0;
2281 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA;
2282 } else max_length -= entry->length;
2283
2284 if(0 != entry->entry)
2285 free(entry->entry);
2286
2287 if(entry->length == 0) {
2288 entry->entry = 0;
2289 }
2290 else {
2291 if(0 == (entry->entry = safe_malloc_add_2op_(entry->length, /*+*/1)))
2292 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2293
2294 if(read_cb(entry->entry, 1, entry->length, handle) != entry->length)
2295 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2296
2297 entry->entry[entry->length] = '\0';
2298 }
2299
2300 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2301}
2302
2303FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_VorbisComment *block, unsigned block_length)
2304{
2305 unsigned i;
2306 FLAC__Metadata_SimpleIteratorStatus status;
2307 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2308 FLAC__byte buffer[4]; /* magic number is asserted below */
2309
2310 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8 == sizeof(buffer));
2311
2312 status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, &(block->vendor_string), block_length);
2313 if(block_length >= 4)
2314 block_length -= 4;
2315 if(status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA)
2316 goto skip;
2317 else if(status != FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK)
2318 return status;
2319 block_length -= block->vendor_string.length;
2320
2321 if(block_length < num_comments_len) goto skip; else block_length -= num_comments_len;
2322 if(read_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2323 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2324 block->num_comments = unpack_uint32_little_endian_(buffer, num_comments_len);
2325
2326 if(block->num_comments == 0) {
2327 block->comments = 0;
2328 }
2329 else if(0 == (block->comments = calloc(block->num_comments, sizeof(FLAC__StreamMetadata_VorbisComment_Entry)))) {
2330 block->num_comments = 0;
2331 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2332 }
2333
2334 for(i = 0; i < block->num_comments; i++) {
2335 status = read_metadata_block_data_vorbis_comment_entry_cb_(handle, read_cb, block->comments + i, block_length);
2336 if(block_length >= 4) block_length -= 4;
2337 if(status == FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA) {
2338 block->num_comments = i;
2339 goto skip;
2340 }
2341 else if(status != FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK) return status;
2342 block_length -= block->comments[i].length;
2343 }
2344
2345 skip:
2346 if(block_length > 0) {
2347 /* bad metadata */
2348 if(0 != seek_cb(handle, block_length, SEEK_CUR))
2349 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2350 }
2351
2352 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2353}
2354
2355FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track)
2356{
2357 unsigned i, len;
2358 FLAC__byte buffer[32]; /* asserted below that this is big enough */
2359
2360 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2361 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2362 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);
2363
2364 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2365 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2366 if(read_cb(buffer, 1, len, handle) != len)
2367 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2368 track->offset = unpack_uint64_(buffer, len);
2369
2370 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2371 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2372 if(read_cb(buffer, 1, len, handle) != len)
2373 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2374 track->number = (FLAC__byte)unpack_uint32_(buffer, len);
2375
2376 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2377 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2378 if(read_cb(track->isrc, 1, len, handle) != len)
2379 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2380
2381 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);
2382 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2383 if(read_cb(buffer, 1, len, handle) != len)
2384 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2385 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN == 1);
2386 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN == 1);
2387 track->type = buffer[0] >> 7;
2388 track->pre_emphasis = (buffer[0] >> 6) & 1;
2389
2390 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2391 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2392 if(read_cb(buffer, 1, len, handle) != len)
2393 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2394 track->num_indices = (FLAC__byte)unpack_uint32_(buffer, len);
2395
2396 if(track->num_indices == 0) {
2397 track->indices = 0;
2398 }
2399 else if(0 == (track->indices = calloc(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index))))
2400 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2401
2402 for(i = 0; i < track->num_indices; i++) {
2403 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2404 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2405 if(read_cb(buffer, 1, len, handle) != len)
2406 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2407 track->indices[i].offset = unpack_uint64_(buffer, len);
2408
2409 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2410 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2411 if(read_cb(buffer, 1, len, handle) != len)
2412 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2413 track->indices[i].number = (FLAC__byte)unpack_uint32_(buffer, len);
2414
2415 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2416 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2417 if(read_cb(buffer, 1, len, handle) != len)
2418 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2419 }
2420
2421 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2422}
2423
2424FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block)
2425{
2426 unsigned i, len;
2427 FLAC__Metadata_SimpleIteratorStatus status;
2428 FLAC__byte buffer[1024]; /* MSVC needs a constant expression so we put a magic number and assert */
2429
2430 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN)/8 <= sizeof(buffer));
2431 FLAC__ASSERT(sizeof(FLAC__uint64) <= sizeof(buffer));
2432
2433 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2434 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2435 if(read_cb(block->media_catalog_number, 1, len, handle) != len)
2436 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2437
2438 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2439 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2440 if(read_cb(buffer, 1, len, handle) != len)
2441 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2442 block->lead_in = unpack_uint64_(buffer, len);
2443
2444 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2445 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2446 if(read_cb(buffer, 1, len, handle) != len)
2447 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2448 block->is_cd = buffer[0]&0x80? true : false;
2449
2450 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2451 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2452 if(read_cb(buffer, 1, len, handle) != len)
2453 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2454 block->num_tracks = unpack_uint32_(buffer, len);
2455
2456 if(block->num_tracks == 0) {
2457 block->tracks = 0;
2458 }
2459 else if(0 == (block->tracks = calloc(block->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track))))
2460 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2461
2462 for(i = 0; i < block->num_tracks; i++) {
2463 if(FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK != (status = read_metadata_block_data_cuesheet_track_cb_(handle, read_cb, block->tracks + i)))
2464 return status;
2465 }
2466
2467 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2468}
2469
2470static 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)
2471{
2472 FLAC__byte buffer[sizeof(FLAC__uint32)];
2473
2474 FLAC__ASSERT(0 != data);
2475 FLAC__ASSERT(length_len%8 == 0);
2476
2477 length_len /= 8; /* convert to bytes */
2478
2479 FLAC__ASSERT(sizeof(buffer) >= length_len);
2480
2481 if(read_cb(buffer, 1, length_len, handle) != length_len)
2482 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2483 *length = unpack_uint32_(buffer, length_len);
2484
2485 if(0 != *data)
2486 free(*data);
2487
2488 if(0 == (*data = safe_malloc_add_2op_(*length, /*+*/1)))
2489 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2490
2491 if(*length > 0) {
2492 if(read_cb(*data, 1, *length, handle) != *length)
2493 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2494 }
2495
2496 (*data)[*length] = '\0';
2497
2498 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2499}
2500
2501FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block)
2502{
2503 FLAC__Metadata_SimpleIteratorStatus status;
2504 FLAC__byte buffer[4]; /* asserted below that this is big enough */
2505 FLAC__uint32 len;
2506
2507 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2508 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2509 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2510 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2511 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2512
2513 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_TYPE_LEN % 8 == 0);
2514 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN / 8;
2515 if(read_cb(buffer, 1, len, handle) != len)
2516 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2517 block->type = (FLAC__StreamMetadata_Picture_Type)unpack_uint32_(buffer, len);
2518
2519 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)
2520 return status;
2521
2522 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)
2523 return status;
2524
2525 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN % 8 == 0);
2526 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN / 8;
2527 if(read_cb(buffer, 1, len, handle) != len)
2528 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2529 block->width = unpack_uint32_(buffer, len);
2530
2531 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN % 8 == 0);
2532 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN / 8;
2533 if(read_cb(buffer, 1, len, handle) != len)
2534 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2535 block->height = unpack_uint32_(buffer, len);
2536
2537 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN % 8 == 0);
2538 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN / 8;
2539 if(read_cb(buffer, 1, len, handle) != len)
2540 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2541 block->depth = unpack_uint32_(buffer, len);
2542
2543 FLAC__ASSERT(FLAC__STREAM_METADATA_PICTURE_COLORS_LEN % 8 == 0);
2544 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN / 8;
2545 if(read_cb(buffer, 1, len, handle) != len)
2546 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2547 block->colors = unpack_uint32_(buffer, len);
2548
2549 /* for convenience we use read_metadata_block_data_picture_cstring_cb_() even though it adds an extra terminating NUL we don't use */
2550 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)
2551 return status;
2552
2553 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2554}
2555
2556FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2557{
2558 if(block_length == 0) {
2559 block->data = 0;
2560 }
2561 else {
2562 if(0 == (block->data = malloc(block_length)))
2563 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2564
2565 if(read_cb(block->data, 1, block_length, handle) != block_length)
2566 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
2567 }
2568
2569 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2570}
2571
2572FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2573{
2574 FLAC__ASSERT(0 != file);
2575 FLAC__ASSERT(0 != status);
2576
2577 if(!write_metadata_block_header_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2578 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2579 return false;
2580 }
2581
2582 return true;
2583}
2584
2585FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block)
2586{
2587 FLAC__ASSERT(0 != file);
2588 FLAC__ASSERT(0 != status);
2589
2590 if (write_metadata_block_data_cb_((FLAC__IOHandle)file, (FLAC__IOCallback_Write)fwrite, block)) {
2591 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK;
2592 return true;
2593 }
2594 else {
2595 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
2596 return false;
2597 }
2598}
2599
2600FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2601{
2602 FLAC__byte buffer[FLAC__STREAM_METADATA_HEADER_LENGTH];
2603
2604 FLAC__ASSERT(block->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
2605 /* double protection */
2606 if(block->length >= (1u << FLAC__STREAM_METADATA_LENGTH_LEN))
2607 return false;
2608
2609 buffer[0] = (block->is_last? 0x80 : 0) | (FLAC__byte)block->type;
2610 pack_uint32_(block->length, buffer + 1, 3);
2611
2612 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_HEADER_LENGTH, handle) != FLAC__STREAM_METADATA_HEADER_LENGTH)
2613 return false;
2614
2615 return true;
2616}
2617
2618FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block)
2619{
2620 FLAC__ASSERT(0 != block);
2621
2622 switch(block->type) {
2623 case FLAC__METADATA_TYPE_STREAMINFO:
2624 return write_metadata_block_data_streaminfo_cb_(handle, write_cb, &block->data.stream_info);
2625 case FLAC__METADATA_TYPE_PADDING:
2626 return write_metadata_block_data_padding_cb_(handle, write_cb, &block->data.padding, block->length);
2627 case FLAC__METADATA_TYPE_APPLICATION:
2628 return write_metadata_block_data_application_cb_(handle, write_cb, &block->data.application, block->length);
2629 case FLAC__METADATA_TYPE_SEEKTABLE:
2630 return write_metadata_block_data_seektable_cb_(handle, write_cb, &block->data.seek_table);
2631 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
2632 return write_metadata_block_data_vorbis_comment_cb_(handle, write_cb, &block->data.vorbis_comment);
2633 case FLAC__METADATA_TYPE_CUESHEET:
2634 return write_metadata_block_data_cuesheet_cb_(handle, write_cb, &block->data.cue_sheet);
2635 case FLAC__METADATA_TYPE_PICTURE:
2636 return write_metadata_block_data_picture_cb_(handle, write_cb, &block->data.picture);
2637 default:
2638 return write_metadata_block_data_unknown_cb_(handle, write_cb, &block->data.unknown, block->length);
2639 }
2640}
2641
2642FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block)
2643{
2644 FLAC__byte buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH];
2645 const unsigned channels1 = block->channels - 1;
2646 const unsigned bps1 = block->bits_per_sample - 1;
2647
2648 /* we are using hardcoded numbers for simplicity but we should
2649 * probably eventually write a bit-level packer and use the
2650 * _STREAMINFO_ constants.
2651 */
2652 pack_uint32_(block->min_blocksize, buffer, 2);
2653 pack_uint32_(block->max_blocksize, buffer+2, 2);
2654 pack_uint32_(block->min_framesize, buffer+4, 3);
2655 pack_uint32_(block->max_framesize, buffer+7, 3);
2656 buffer[10] = (block->sample_rate >> 12) & 0xff;
2657 buffer[11] = (block->sample_rate >> 4) & 0xff;
2658 buffer[12] = ((block->sample_rate & 0x0f) << 4) | (channels1 << 1) | (bps1 >> 4);
2659 buffer[13] = (FLAC__byte)(((bps1 & 0x0f) << 4) | ((block->total_samples >> 32) & 0x0f));
2660 pack_uint32_((FLAC__uint32)block->total_samples, buffer+14, 4);
2661 memcpy(buffer+18, block->md5sum, 16);
2662
2663 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_STREAMINFO_LENGTH, handle) != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
2664 return false;
2665
2666 return true;
2667}
2668
2669FLAC__bool write_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Padding *block, unsigned block_length)
2670{
2671 unsigned i, n = block_length;
2672 FLAC__byte buffer[1024];
2673
2674 (void)block;
2675
2676 memset(buffer, 0, 1024);
2677
2678 for(i = 0; i < n/1024; i++)
2679 if(write_cb(buffer, 1, 1024, handle) != 1024)
2680 return false;
2681
2682 n %= 1024;
2683
2684 if(write_cb(buffer, 1, n, handle) != n)
2685 return false;
2686
2687 return true;
2688}
2689
2690FLAC__bool write_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Application *block, unsigned block_length)
2691{
2692 const unsigned id_bytes = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
2693
2694 if(write_cb(block->id, 1, id_bytes, handle) != id_bytes)
2695 return false;
2696
2697 block_length -= id_bytes;
2698
2699 if(write_cb(block->data, 1, block_length, handle) != block_length)
2700 return false;
2701
2702 return true;
2703}
2704
2705FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block)
2706{
2707 unsigned i;
2708 FLAC__byte buffer[FLAC__STREAM_METADATA_SEEKPOINT_LENGTH];
2709
2710 for(i = 0; i < block->num_points; i++) {
2711 /* some MAGIC NUMBERs here */
2712 pack_uint64_(block->points[i].sample_number, buffer, 8);
2713 pack_uint64_(block->points[i].stream_offset, buffer+8, 8);
2714 pack_uint32_(block->points[i].frame_samples, buffer+16, 2);
2715 if(write_cb(buffer, 1, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH, handle) != FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)
2716 return false;
2717 }
2718
2719 return true;
2720}
2721
2722FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block)
2723{
2724 unsigned i;
2725 const unsigned entry_length_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN / 8;
2726 const unsigned num_comments_len = FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN / 8;
2727 FLAC__byte buffer[4]; /* magic number is asserted below */
2728
2729 FLAC__ASSERT(flac_max(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN, FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN) / 8 == sizeof(buffer));
2730
2731 pack_uint32_little_endian_(block->vendor_string.length, buffer, entry_length_len);
2732 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2733 return false;
2734 if(write_cb(block->vendor_string.entry, 1, block->vendor_string.length, handle) != block->vendor_string.length)
2735 return false;
2736
2737 pack_uint32_little_endian_(block->num_comments, buffer, num_comments_len);
2738 if(write_cb(buffer, 1, num_comments_len, handle) != num_comments_len)
2739 return false;
2740
2741 for(i = 0; i < block->num_comments; i++) {
2742 pack_uint32_little_endian_(block->comments[i].length, buffer, entry_length_len);
2743 if(write_cb(buffer, 1, entry_length_len, handle) != entry_length_len)
2744 return false;
2745 if(write_cb(block->comments[i].entry, 1, block->comments[i].length, handle) != block->comments[i].length)
2746 return false;
2747 }
2748
2749 return true;
2750}
2751
2752FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block)
2753{
2754 unsigned i, j, len;
2755 FLAC__byte buffer[1024]; /* asserted below that this is big enough */
2756
2757 FLAC__ASSERT(sizeof(buffer) >= sizeof(FLAC__uint64));
2758 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN/8);
2759 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);
2760 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN/8);
2761
2762 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
2763 len = FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN / 8;
2764 if(write_cb(block->media_catalog_number, 1, len, handle) != len)
2765 return false;
2766
2767 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN % 8 == 0);
2768 len = FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN / 8;
2769 pack_uint64_(block->lead_in, buffer, len);
2770 if(write_cb(buffer, 1, len, handle) != len)
2771 return false;
2772
2773 FLAC__ASSERT((FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) % 8 == 0);
2774 len = (FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN + FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN) / 8;
2775 memset(buffer, 0, len);
2776 if(block->is_cd)
2777 buffer[0] |= 0x80;
2778 if(write_cb(buffer, 1, len, handle) != len)
2779 return false;
2780
2781 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN % 8 == 0);
2782 len = FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN / 8;
2783 pack_uint32_(block->num_tracks, buffer, len);
2784 if(write_cb(buffer, 1, len, handle) != len)
2785 return false;
2786
2787 for(i = 0; i < block->num_tracks; i++) {
2788 FLAC__StreamMetadata_CueSheet_Track *track = block->tracks + i;
2789
2790 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN % 8 == 0);
2791 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN / 8;
2792 pack_uint64_(track->offset, buffer, len);
2793 if(write_cb(buffer, 1, len, handle) != len)
2794 return false;
2795
2796 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN % 8 == 0);
2797 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN / 8;
2798 pack_uint32_(track->number, buffer, len);
2799 if(write_cb(buffer, 1, len, handle) != len)
2800 return false;
2801
2802 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
2803 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN / 8;
2804 if(write_cb(track->isrc, 1, len, handle) != len)
2805 return false;
2806
2807 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);
2808 len = (FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN + FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN) / 8;
2809 memset(buffer, 0, len);
2810 buffer[0] = (track->type << 7) | (track->pre_emphasis << 6);
2811 if(write_cb(buffer, 1, len, handle) != len)
2812 return false;
2813
2814 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN % 8 == 0);
2815 len = FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN / 8;
2816 pack_uint32_(track->num_indices, buffer, len);
2817 if(write_cb(buffer, 1, len, handle) != len)
2818 return false;
2819
2820 for(j = 0; j < track->num_indices; j++) {
2821 FLAC__StreamMetadata_CueSheet_Index *indx = track->indices + j;
2822
2823 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN % 8 == 0);
2824 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN / 8;
2825 pack_uint64_(indx->offset, buffer, len);
2826 if(write_cb(buffer, 1, len, handle) != len)
2827 return false;
2828
2829 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN % 8 == 0);
2830 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN / 8;
2831 pack_uint32_(indx->number, buffer, len);
2832 if(write_cb(buffer, 1, len, handle) != len)
2833 return false;
2834
2835 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN % 8 == 0);
2836 len = FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN / 8;
2837 memset(buffer, 0, len);
2838 if(write_cb(buffer, 1, len, handle) != len)
2839 return false;
2840 }
2841 }
2842
2843 return true;
2844}
2845
2846FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block)
2847{
2848 unsigned len;
2849 size_t slen;
2850 FLAC__byte buffer[4]; /* magic number is asserted below */
2851
2852 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_TYPE_LEN%8);
2853 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN%8);
2854 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN%8);
2855 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN%8);
2856 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN%8);
2857 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN%8);
2858 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_COLORS_LEN%8);
2859 FLAC__ASSERT(0 == FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN%8);
2860 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8);
2861 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8);
2862 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8);
2863 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8);
2864 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8);
2865 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8);
2866 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8);
2867 FLAC__ASSERT(sizeof(buffer) >= FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8);
2868
2869 len = FLAC__STREAM_METADATA_PICTURE_TYPE_LEN/8;
2870 pack_uint32_(block->type, buffer, len);
2871 if(write_cb(buffer, 1, len, handle) != len)
2872 return false;
2873
2874 len = FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN/8;
2875 slen = strlen(block->mime_type);
2876 pack_uint32_(slen, buffer, len);
2877 if(write_cb(buffer, 1, len, handle) != len)
2878 return false;
2879 if(write_cb(block->mime_type, 1, slen, handle) != slen)
2880 return false;
2881
2882 len = FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN/8;
2883 slen = strlen((const char *)block->description);
2884 pack_uint32_(slen, buffer, len);
2885 if(write_cb(buffer, 1, len, handle) != len)
2886 return false;
2887 if(write_cb(block->description, 1, slen, handle) != slen)
2888 return false;
2889
2890 len = FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN/8;
2891 pack_uint32_(block->width, buffer, len);
2892 if(write_cb(buffer, 1, len, handle) != len)
2893 return false;
2894
2895 len = FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN/8;
2896 pack_uint32_(block->height, buffer, len);
2897 if(write_cb(buffer, 1, len, handle) != len)
2898 return false;
2899
2900 len = FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN/8;
2901 pack_uint32_(block->depth, buffer, len);
2902 if(write_cb(buffer, 1, len, handle) != len)
2903 return false;
2904
2905 len = FLAC__STREAM_METADATA_PICTURE_COLORS_LEN/8;
2906 pack_uint32_(block->colors, buffer, len);
2907 if(write_cb(buffer, 1, len, handle) != len)
2908 return false;
2909
2910 len = FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN/8;
2911 pack_uint32_(block->data_length, buffer, len);
2912 if(write_cb(buffer, 1, len, handle) != len)
2913 return false;
2914 if(write_cb(block->data, 1, block->data_length, handle) != block->data_length)
2915 return false;
2916
2917 return true;
2918}
2919
2920FLAC__bool write_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Unknown *block, unsigned block_length)
2921{
2922 if(write_cb(block->data, 1, block_length, handle) != block_length)
2923 return false;
2924
2925 return true;
2926}
2927
2928FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block)
2929{
2930 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2931 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2932 return false;
2933 }
2934
2935 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2936 return false;
2937
2938 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2939 return false;
2940
2941 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2942 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2943 return false;
2944 }
2945
2946 return read_metadata_block_header_(iterator);
2947}
2948
2949FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last)
2950{
2951 FLAC__StreamMetadata *padding;
2952
2953 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2954 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2955 return false;
2956 }
2957
2958 block->is_last = false;
2959
2960 if(!write_metadata_block_header_(iterator->file, &iterator->status, block))
2961 return false;
2962
2963 if(!write_metadata_block_data_(iterator->file, &iterator->status, block))
2964 return false;
2965
2966 if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
2967 return FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
2968
2969 padding->is_last = padding_is_last;
2970 padding->length = padding_length;
2971
2972 if(!write_metadata_block_header_(iterator->file, &iterator->status, padding)) {
2973 FLAC__metadata_object_delete(padding);
2974 return false;
2975 }
2976
2977 if(!write_metadata_block_data_(iterator->file, &iterator->status, padding)) {
2978 FLAC__metadata_object_delete(padding);
2979 return false;
2980 }
2981
2982 FLAC__metadata_object_delete(padding);
2983
2984 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
2985 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
2986 return false;
2987 }
2988
2989 return read_metadata_block_header_(iterator);
2990}
2991
2992FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append)
2993{
2994 FILE *tempfile = NULL;
2995 char *tempfilename = NULL;
2996 int fixup_is_last_code = 0; /* 0 => no need to change any is_last flags */
2997 FLAC__off_t fixup_is_last_flag_offset = -1;
2998
2999 FLAC__ASSERT(0 != block || append == false);
3000
3001 if(iterator->is_last) {
3002 if(append) {
3003 fixup_is_last_code = 1; /* 1 => clear the is_last flag at the following offset */
3004 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
3005 }
3006 else if(0 == block) {
3007 simple_iterator_push_(iterator);
3008 if(!FLAC__metadata_simple_iterator_prev(iterator)) {
3009 (void)simple_iterator_pop_(iterator);
3010 return false;
3011 }
3012 fixup_is_last_code = -1; /* -1 => set the is_last the flag at the following offset */
3013 fixup_is_last_flag_offset = iterator->offset[iterator->depth];
3014 if(!simple_iterator_pop_(iterator))
3015 return false;
3016 }
3017 }
3018
3019 if(!simple_iterator_copy_file_prefix_(iterator, &tempfile, &tempfilename, append))
3020 return false;
3021
3022 if(0 != block) {
3023 if(!write_metadata_block_header_(tempfile, &iterator->status, block)) {
3024 cleanup_tempfile_(&tempfile, &tempfilename);
3025 return false;
3026 }
3027
3028 if(!write_metadata_block_data_(tempfile, &iterator->status, block)) {
3029 cleanup_tempfile_(&tempfile, &tempfilename);
3030 return false;
3031 }
3032 }
3033
3034 if(!simple_iterator_copy_file_postfix_(iterator, &tempfile, &tempfilename, fixup_is_last_code, fixup_is_last_flag_offset, block==0))
3035 return false;
3036
3037 if(append)
3038 return FLAC__metadata_simple_iterator_next(iterator);
3039
3040 return true;
3041}
3042
3043void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator)
3044{
3045 FLAC__ASSERT(iterator->depth+1 < SIMPLE_ITERATOR_MAX_PUSH_DEPTH);
3046 iterator->offset[iterator->depth+1] = iterator->offset[iterator->depth];
3047 iterator->depth++;
3048}
3049
3050FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator)
3051{
3052 FLAC__ASSERT(iterator->depth > 0);
3053 iterator->depth--;
3054 if(0 != fseeko(iterator->file, iterator->offset[iterator->depth], SEEK_SET)) {
3055 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3056 return false;
3057 }
3058
3059 return read_metadata_block_header_(iterator);
3060}
3061
3062/* return meanings:
3063 * 0: ok
3064 * 1: read error
3065 * 2: seek error
3066 * 3: not a FLAC file
3067 */
3068unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb)
3069{
3070 FLAC__byte buffer[4];
3071 size_t n;
3072 unsigned i;
3073
3074 FLAC__ASSERT(FLAC__STREAM_SYNC_LENGTH == sizeof(buffer));
3075
3076 /* skip any id3v2 tag */
3077 errno = 0;
3078 n = read_cb(buffer, 1, 4, handle);
3079 if(errno)
3080 return 1;
3081 else if(n != 4)
3082 return 3;
3083 else if(0 == memcmp(buffer, "ID3", 3)) {
3084 unsigned tag_length = 0;
3085
3086 /* skip to the tag length */
3087 if(seek_cb(handle, 2, SEEK_CUR) < 0)
3088 return 2;
3089
3090 /* read the length */
3091 for(i = 0; i < 4; i++) {
3092 if(read_cb(buffer, 1, 1, handle) < 1 || buffer[0] & 0x80)
3093 return 1;
3094 tag_length <<= 7;
3095 tag_length |= (buffer[0] & 0x7f);
3096 }
3097
3098 /* skip the rest of the tag */
3099 if(seek_cb(handle, tag_length, SEEK_CUR) < 0)
3100 return 2;
3101
3102 /* read the stream sync code */
3103 errno = 0;
3104 n = read_cb(buffer, 1, 4, handle);
3105 if(errno)
3106 return 1;
3107 else if(n != 4)
3108 return 3;
3109 }
3110
3111 /* check for the fLaC signature */
3112 if(0 == memcmp(FLAC__STREAM_SYNC_STRING, buffer, FLAC__STREAM_SYNC_LENGTH))
3113 return 0;
3114 else
3115 return 3;
3116}
3117
3118unsigned seek_to_first_metadata_block_(FILE *f)
3119{
3120 return seek_to_first_metadata_block_cb_((FLAC__IOHandle)f, (FLAC__IOCallback_Read)fread, fseek_wrapper_);
3121}
3122
3123FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append)
3124{
3125 const FLAC__off_t offset_end = append? iterator->offset[iterator->depth] + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length : iterator->offset[iterator->depth];
3126
3127 if(0 != fseeko(iterator->file, 0, SEEK_SET)) {
3128 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3129 return false;
3130 }
3131 if(!open_tempfile_(iterator->filename, iterator->tempfile_path_prefix, tempfile, tempfilename, &iterator->status)) {
3132 cleanup_tempfile_(tempfile, tempfilename);
3133 return false;
3134 }
3135 if(!copy_n_bytes_from_file_(iterator->file, *tempfile, offset_end, &iterator->status)) {
3136 cleanup_tempfile_(tempfile, tempfilename);
3137 return false;
3138 }
3139
3140 return true;
3141}
3142
3143FLAC__bool simple_iterator_copy_file_postfix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, int fixup_is_last_code, FLAC__off_t fixup_is_last_flag_offset, FLAC__bool backup)
3144{
3145 FLAC__off_t save_offset = iterator->offset[iterator->depth];
3146 FLAC__ASSERT(0 != *tempfile);
3147
3148 if(0 != fseeko(iterator->file, save_offset + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length, SEEK_SET)) {
3149 cleanup_tempfile_(tempfile, tempfilename);
3150 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3151 return false;
3152 }
3153 if(!copy_remaining_bytes_from_file_(iterator->file, *tempfile, &iterator->status)) {
3154 cleanup_tempfile_(tempfile, tempfilename);
3155 return false;
3156 }
3157
3158 if(fixup_is_last_code != 0) {
3159 /*
3160 * if code == 1, it means a block was appended to the end so
3161 * we have to clear the is_last flag of the previous block
3162 * if code == -1, it means the last block was deleted so
3163 * we have to set the is_last flag of the previous block
3164 */
3165 /* MAGIC NUMBERs here; we know the is_last flag is the high bit of the byte at this location */
3166 FLAC__byte x;
3167 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3168 cleanup_tempfile_(tempfile, tempfilename);
3169 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3170 return false;
3171 }
3172 if(fread(&x, 1, 1, *tempfile) != 1) {
3173 cleanup_tempfile_(tempfile, tempfilename);
3174 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3175 return false;
3176 }
3177 if(fixup_is_last_code > 0) {
3178 FLAC__ASSERT(x & 0x80);
3179 x &= 0x7f;
3180 }
3181 else {
3182 FLAC__ASSERT(!(x & 0x80));
3183 x |= 0x80;
3184 }
3185 if(0 != fseeko(*tempfile, fixup_is_last_flag_offset, SEEK_SET)) {
3186 cleanup_tempfile_(tempfile, tempfilename);
3187 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR;
3188 return false;
3189 }
3190 if(local__fwrite(&x, 1, 1, *tempfile) != 1) {
3191 cleanup_tempfile_(tempfile, tempfilename);
3192 iterator->status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3193 return false;
3194 }
3195 }
3196
3197 (void)fclose(iterator->file);
3198
3199 if(!transport_tempfile_(iterator->filename, tempfile, tempfilename, &iterator->status))
3200 return false;
3201
3202 if(iterator->has_stats)
3203 set_file_stats_(iterator->filename, &iterator->stats);
3204
3205 if(!simple_iterator_prime_input_(iterator, !iterator->is_writable))
3206 return false;
3207 if(backup) {
3208 while(iterator->offset[iterator->depth] + (FLAC__off_t)FLAC__STREAM_METADATA_HEADER_LENGTH + (FLAC__off_t)iterator->length < save_offset)
3209 if(!FLAC__metadata_simple_iterator_next(iterator))
3210 return false;
3211 return true;
3212 }
3213 else {
3214 /* move the iterator to it's original block faster by faking a push, then doing a pop_ */
3215 FLAC__ASSERT(iterator->depth == 0);
3216 iterator->offset[0] = save_offset;
3217 iterator->depth++;
3218 return simple_iterator_pop_(iterator);
3219 }
3220}
3221
3222FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status)
3223{
3224 FLAC__byte buffer[8192];
3225 size_t n;
3226
3227 FLAC__ASSERT(bytes >= 0);
3228 while(bytes > 0) {
3229 n = flac_min(sizeof(buffer), (size_t)bytes);
3230 if(fread(buffer, 1, n, file) != n) {
3231 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3232 return false;
3233 }
3234 if(local__fwrite(buffer, 1, n, tempfile) != n) {
3235 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3236 return false;
3237 }
3238 bytes -= n;
3239 }
3240
3241 return true;
3242}
3243
3244FLAC__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, FLAC__off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status)
3245{
3246 FLAC__byte buffer[8192];
3247 size_t n;
3248
3249 FLAC__ASSERT(bytes >= 0);
3250 while(bytes > 0) {
3251 n = flac_min(sizeof(buffer), (size_t)bytes);
3252 if(read_cb(buffer, 1, n, handle) != n) {
3253 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3254 return false;
3255 }
3256 if(temp_write_cb(buffer, 1, n, temp_handle) != n) {
3257 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3258 return false;
3259 }
3260 bytes -= n;
3261 }
3262
3263 return true;
3264}
3265
3266FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status)
3267{
3268 FLAC__byte buffer[8192];
3269 size_t n;
3270
3271 while(!feof(file)) {
3272 n = fread(buffer, 1, sizeof(buffer), file);
3273 if(n == 0 && !feof(file)) {
3274 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3275 return false;
3276 }
3277 if(n > 0 && local__fwrite(buffer, 1, n, tempfile) != n) {
3278 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3279 return false;
3280 }
3281 }
3282
3283 return true;
3284}
3285
3286FLAC__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)
3287{
3288 FLAC__byte buffer[8192];
3289 size_t n;
3290
3291 while(!eof_cb(handle)) {
3292 n = read_cb(buffer, 1, sizeof(buffer), handle);
3293 if(n == 0 && !eof_cb(handle)) {
3294 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR;
3295 return false;
3296 }
3297 if(n > 0 && temp_write_cb(buffer, 1, n, temp_handle) != n) {
3298 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR;
3299 return false;
3300 }
3301 }
3302
3303 return true;
3304}
3305
3306static int
3307local_snprintf(char *str, size_t size, const char *fmt, ...)
3308{
3309 va_list va;
3310 int rc;
3311
3312#if defined _MSC_VER
3313 if (size == 0)
3314 return 1024;
3315#endif
3316
3317 va_start (va, fmt);
3318
3319#if defined _MSC_VER
3320 rc = vsnprintf_s (str, size, _TRUNCATE, fmt, va);
3321 if (rc < 0)
3322 rc = size - 1;
3323#elif defined __MINGW32__
3324 rc = __mingw_vsnprintf (str, size, fmt, va);
3325#else
3326 rc = vsnprintf (str, size, fmt, va);
3327#endif
3328 va_end (va);
3329
3330 return rc;
3331}
3332
3333FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3334{
3335 static const char *tempfile_suffix = ".metadata_edit";
3336 if(0 == tempfile_path_prefix) {
3337 size_t dest_len = strlen(filename) + strlen(tempfile_suffix) + 1;
3338 if(0 == (*tempfilename = safe_malloc_(dest_len))) {
3339 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3340 return false;
3341 }
3342 local_snprintf(*tempfilename, dest_len, "%s%s", filename, tempfile_suffix);
3343 }
3344 else {
3345 const char *p = strrchr(filename, '/');
3346 size_t dest_len;
3347 if(0 == p)
3348 p = filename;
3349 else
3350 p++;
3351
3352 dest_len = strlen(tempfile_path_prefix) + strlen(p) + strlen(tempfile_suffix) + 2;
3353
3354 if(0 == (*tempfilename = safe_malloc_(dest_len))) {
3355 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR;
3356 return false;
3357 }
3358 local_snprintf(*tempfilename, dest_len, "%s/%s%s", tempfile_path_prefix, p, tempfile_suffix);
3359 }
3360
3361 if(0 == (*tempfile = flac_fopen(*tempfilename, "w+b"))) {
3362 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE;
3363 return false;
3364 }
3365
3366 return true;
3367}
3368
3369FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status)
3370{
3371 FLAC__ASSERT(0 != filename);
3372 FLAC__ASSERT(0 != tempfile);
3373 FLAC__ASSERT(0 != *tempfile);
3374 FLAC__ASSERT(0 != tempfilename);
3375 FLAC__ASSERT(0 != *tempfilename);
3376 FLAC__ASSERT(0 != status);
3377
3378 (void)fclose(*tempfile);
3379 *tempfile = 0;
3380
3381#if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__ || defined __EMX__
3382 /* on some flavors of windows, flac_rename() will fail if the destination already exists */
3383 if(flac_unlink(filename) < 0) {
3384 cleanup_tempfile_(tempfile, tempfilename);
3385 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR;
3386 return false;
3387 }
3388#endif
3389
3390 /*@@@ to fully support the tempfile_path_prefix we need to update this piece to actually copy across filesystems instead of just flac_rename(): */
3391 if(0 != flac_rename(*tempfilename, filename)) {
3392 cleanup_tempfile_(tempfile, tempfilename);
3393 *status = FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR;
3394 return false;
3395 }
3396
3397 cleanup_tempfile_(tempfile, tempfilename);
3398
3399 return true;
3400}
3401
3402void cleanup_tempfile_(FILE **tempfile, char **tempfilename)
3403{
3404 if(0 != *tempfile) {
3405 (void)fclose(*tempfile);
3406 *tempfile = 0;
3407 }
3408
3409 if(0 != *tempfilename) {
3410 (void)flac_unlink(*tempfilename);
3411 free(*tempfilename);
3412 *tempfilename = 0;
3413 }
3414}
3415
3416FLAC__bool get_file_stats_(const char *filename, struct flac_stat_s *stats)
3417{
3418 FLAC__ASSERT(0 != filename);
3419 FLAC__ASSERT(0 != stats);
3420 return (0 == flac_stat(filename, stats));
3421}
3422
3423void set_file_stats_(const char *filename, struct flac_stat_s *stats)
3424{
3425 struct utimbuf srctime;
3426
3427 FLAC__ASSERT(0 != filename);
3428 FLAC__ASSERT(0 != stats);
3429
3430 srctime.actime = stats->st_atime;
3431 srctime.modtime = stats->st_mtime;
3432 (void)flac_chmod(filename, stats->st_mode);
3433 (void)flac_utime(filename, &srctime);
3434#if !defined _MSC_VER && !defined __BORLANDC__ && !defined __MINGW32__
3435 FLAC_CHECK_RETURN(chown(filename, stats->st_uid, -1));
3436 FLAC_CHECK_RETURN(chown(filename, -1, stats->st_gid));
3437#endif
3438}
3439
3440int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence)
3441{
3442 return fseeko((FILE*)handle, (FLAC__off_t)offset, whence);
3443}
3444
3445FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle)
3446{
3447 return ftello((FILE*)handle);
3448}
3449
3450FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status)
3451{
3452 switch(status) {
3453 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK:
3454 return FLAC__METADATA_CHAIN_STATUS_OK;
3455 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT:
3456 return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT;
3457 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE:
3458 return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE;
3459 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE:
3460 return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE;
3461 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE:
3462 return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE;
3463 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA:
3464 return FLAC__METADATA_CHAIN_STATUS_BAD_METADATA;
3465 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR:
3466 return FLAC__METADATA_CHAIN_STATUS_READ_ERROR;
3467 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR:
3468 return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR;
3469 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR:
3470 return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR;
3471 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR:
3472 return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR;
3473 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR:
3474 return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR;
3475 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR:
3476 return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR;
3477 case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR:
3478 default:
3479 return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR;
3480 }
3481}
ARM optimized PCSX fork