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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 | ||
65 | static void pack_uint32_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes); | |
66 | static void pack_uint32_little_endian_(FLAC__uint32 val, FLAC__byte *b, unsigned bytes); | |
67 | static void pack_uint64_(FLAC__uint64 val, FLAC__byte *b, unsigned bytes); | |
68 | static FLAC__uint32 unpack_uint32_(FLAC__byte *b, unsigned bytes); | |
69 | static FLAC__uint32 unpack_uint32_little_endian_(FLAC__byte *b, unsigned bytes); | |
70 | static FLAC__uint64 unpack_uint64_(FLAC__byte *b, unsigned bytes); | |
71 | ||
72 | static FLAC__bool read_metadata_block_header_(FLAC__Metadata_SimpleIterator *iterator); | |
73 | static FLAC__bool read_metadata_block_data_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block); | |
74 | static FLAC__bool read_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__bool *is_last, FLAC__MetadataType *type, unsigned *length); | |
75 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata *block); | |
76 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_StreamInfo *block); | |
77 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Seek seek_cb, FLAC__StreamMetadata_Padding *block, unsigned block_length); | |
78 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Application *block, unsigned block_length); | |
79 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_SeekTable *block, unsigned block_length); | |
80 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_vorbis_comment_entry_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_VorbisComment_Entry *entry, unsigned max_length); | |
81 | static 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); | |
82 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_track_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet_Track *track); | |
83 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_CueSheet *block); | |
84 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Picture *block); | |
85 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__StreamMetadata_Unknown *block, unsigned block_length); | |
86 | ||
87 | static FLAC__bool write_metadata_block_header_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block); | |
88 | static FLAC__bool write_metadata_block_data_(FILE *file, FLAC__Metadata_SimpleIteratorStatus *status, const FLAC__StreamMetadata *block); | |
89 | static FLAC__bool write_metadata_block_header_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block); | |
90 | static FLAC__bool write_metadata_block_data_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata *block); | |
91 | static FLAC__bool write_metadata_block_data_streaminfo_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_StreamInfo *block); | |
92 | static FLAC__bool write_metadata_block_data_padding_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Padding *block, unsigned block_length); | |
93 | static FLAC__bool write_metadata_block_data_application_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Application *block, unsigned block_length); | |
94 | static FLAC__bool write_metadata_block_data_seektable_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_SeekTable *block); | |
95 | static FLAC__bool write_metadata_block_data_vorbis_comment_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_VorbisComment *block); | |
96 | static FLAC__bool write_metadata_block_data_cuesheet_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_CueSheet *block); | |
97 | static FLAC__bool write_metadata_block_data_picture_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Picture *block); | |
98 | static FLAC__bool write_metadata_block_data_unknown_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, const FLAC__StreamMetadata_Unknown *block, unsigned block_length); | |
99 | ||
100 | static FLAC__bool write_metadata_block_stationary_(FLAC__Metadata_SimpleIterator *iterator, const FLAC__StreamMetadata *block); | |
101 | static FLAC__bool write_metadata_block_stationary_with_padding_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, unsigned padding_length, FLAC__bool padding_is_last); | |
102 | static FLAC__bool rewrite_whole_file_(FLAC__Metadata_SimpleIterator *iterator, FLAC__StreamMetadata *block, FLAC__bool append); | |
103 | ||
104 | static void simple_iterator_push_(FLAC__Metadata_SimpleIterator *iterator); | |
105 | static FLAC__bool simple_iterator_pop_(FLAC__Metadata_SimpleIterator *iterator); | |
106 | ||
107 | static unsigned seek_to_first_metadata_block_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb); | |
108 | static unsigned seek_to_first_metadata_block_(FILE *f); | |
109 | ||
110 | static FLAC__bool simple_iterator_copy_file_prefix_(FLAC__Metadata_SimpleIterator *iterator, FILE **tempfile, char **tempfilename, FLAC__bool append); | |
111 | static 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 | ||
113 | static FLAC__bool copy_n_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status); | |
114 | static FLAC__bool copy_n_bytes_from_file_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOHandle temp_handle, FLAC__IOCallback_Write temp_write_cb, FLAC__off_t bytes, FLAC__Metadata_SimpleIteratorStatus *status); | |
115 | static FLAC__bool copy_remaining_bytes_from_file_(FILE *file, FILE *tempfile, FLAC__Metadata_SimpleIteratorStatus *status); | |
116 | static FLAC__bool copy_remaining_bytes_from_file_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Eof eof_cb, FLAC__IOHandle temp_handle, FLAC__IOCallback_Write temp_write_cb, FLAC__Metadata_SimpleIteratorStatus *status); | |
117 | ||
118 | static FLAC__bool open_tempfile_(const char *filename, const char *tempfile_path_prefix, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status); | |
119 | static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename, FLAC__Metadata_SimpleIteratorStatus *status); | |
120 | static void cleanup_tempfile_(FILE **tempfile, char **tempfilename); | |
121 | ||
122 | static FLAC__bool get_file_stats_(const char *filename, struct flac_stat_s *stats); | |
123 | static void set_file_stats_(const char *filename, struct flac_stat_s *stats); | |
124 | ||
125 | static int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence); | |
126 | static FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle); | |
127 | ||
128 | static FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status); | |
129 | ||
130 | ||
131 | #ifdef FLAC__VALGRIND_TESTING | |
132 | static 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 | ||
149 | static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data); | |
150 | static void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data); | |
151 | static void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data); | |
152 | ||
153 | typedef struct { | |
154 | FLAC__bool got_error; | |
155 | FLAC__StreamMetadata *object; | |
156 | } level0_client_data; | |
157 | ||
158 | static 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 | ||
197 | FLAC_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 | ||
217 | FLAC_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 | ||
227 | FLAC_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 | ||
237 | FLAC__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 | ||
244 | void 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 | ||
259 | void 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 | ||
268 | FLAC_API FLAC__bool FLAC__metadata_get_picture(const char *filename, FLAC__StreamMetadata **picture, FLAC__StreamMetadata_Picture_Type type, const char *mime_type, const FLAC__byte *description, unsigned max_width, unsigned max_height, unsigned max_depth, unsigned max_colors) | |
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 | ||
328 | struct 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 | ||
344 | FLAC_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 | ||
361 | FLAC_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 | ||
379 | static 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 | ||
399 | FLAC_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 | ||
407 | FLAC_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 | ||
418 | static 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 | */ | |
477 | FLAC__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 | ||
480 | FLAC_API FLAC__bool FLAC__metadata_simple_iterator_init(FLAC__Metadata_SimpleIterator *iterator, const char *filename, FLAC__bool read_only, FLAC__bool preserve_file_stats) | |
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 | ||
504 | FLAC_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 | ||
512 | FLAC_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 | ||
530 | FLAC_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*/ | |
565 | FLAC_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*/ | |
574 | FLAC_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 | ||
582 | FLAC_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*/ | |
591 | FLAC_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*/ | |
600 | FLAC_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 | ||
627 | FLAC_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 | ||
656 | FLAC_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 | ||
754 | FLAC_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 | ||
835 | FLAC_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 | ||
885 | typedef struct FLAC__Metadata_Node { | |
886 | FLAC__StreamMetadata *data; | |
887 | struct FLAC__Metadata_Node *prev, *next; | |
888 | } FLAC__Metadata_Node; | |
889 | ||
890 | struct 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 | ||
909 | struct FLAC__Metadata_Iterator { | |
910 | FLAC__Metadata_Chain *chain; | |
911 | FLAC__Metadata_Node *current; | |
912 | }; | |
913 | ||
914 | FLAC_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 | ||
934 | static FLAC__Metadata_Node *node_new_(void) | |
935 | { | |
936 | return calloc(1, sizeof(FLAC__Metadata_Node)); | |
937 | } | |
938 | ||
939 | static 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 | ||
947 | static 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 | ||
960 | static 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 | ||
978 | static 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 | ||
1000 | static 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 | ||
1021 | static 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 | ||
1027 | static 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 | ||
1036 | static 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 | ||
1061 | static 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 */ | |
1089 | static 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 | */ | |
1109 | static 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 | ||
1179 | static FLAC__bool chain_read_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__IOCallback_Tell tell_cb) | |
1180 | { | |
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 | ||
1264 | static 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 | ||
1279 | static 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 | ||
1285 | static 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 | ||
1308 | static 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 | ||
1315 | static 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 | ||
1354 | static FLAC__bool chain_rewrite_metadata_in_place_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Write write_cb, FLAC__IOCallback_Seek seek_cb) | |
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 | ||
1383 | static 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 | ||
1403 | static 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 | ||
1458 | err: | |
1459 | (void)fclose(f); | |
1460 | cleanup_tempfile_(&tempfile, &tempfilename); | |
1461 | return false; | |
1462 | } | |
1463 | ||
1464 | /* assumes 'handle' is already at beginning of file */ | |
1465 | static FLAC__bool chain_rewrite_file_cb_(FLAC__Metadata_Chain *chain, FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__IOCallback_Seek seek_cb, FLAC__IOCallback_Eof eof_cb, FLAC__IOHandle temp_handle, FLAC__IOCallback_Write temp_write_cb) | |
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 | ||
1506 | FLAC_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 | ||
1516 | FLAC_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 | ||
1525 | FLAC_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 | ||
1536 | static 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 | ||
1569 | FLAC_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*/ | |
1575 | FLAC_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 | ||
1580 | static 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 | ||
1610 | FLAC_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*/ | |
1616 | FLAC_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 | ||
1621 | typedef enum { | |
1622 | LBS_NONE = 0, | |
1623 | LBS_SIZE_CHANGED, | |
1624 | LBS_BLOCK_ADDED, | |
1625 | LBS_BLOCK_REMOVED | |
1626 | } LastBlockState; | |
1627 | ||
1628 | FLAC_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 | ||
1705 | FLAC_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 | ||
1756 | FLAC_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 | ||
1793 | FLAC_API FLAC__bool FLAC__metadata_chain_write_with_callbacks_and_tempfile(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__IOHandle handle, FLAC__IOCallbacks callbacks, FLAC__IOHandle temp_handle, FLAC__IOCallbacks temp_callbacks) | |
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 | ||
1852 | FLAC_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 | ||
1864 | FLAC_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 | ||
1891 | FLAC_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 | ||
1903 | FLAC_API void FLAC__metadata_iterator_delete(FLAC__Metadata_Iterator *iterator) | |
1904 | { | |
1905 | FLAC__ASSERT(0 != iterator); | |
1906 | ||
1907 | free(iterator); | |
1908 | } | |
1909 | ||
1910 | FLAC_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 | ||
1920 | FLAC_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 | ||
1931 | FLAC_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 | ||
1942 | FLAC_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 | ||
1951 | FLAC_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 | ||
1959 | FLAC_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 | ||
1966 | FLAC_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 | ||
1992 | FLAC_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 | ||
2017 | FLAC_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 | ||
2044 | void 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 | ||
2056 | void 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 | ||
2066 | void 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 | ||
2078 | FLAC__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 | ||
2089 | FLAC__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 | ||
2102 | FLAC__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 | ||
2113 | FLAC__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 | ||
2126 | FLAC__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 | ||
2136 | FLAC__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 | ||
2155 | FLAC__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 | ||
2177 | FLAC__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 | ||
2203 | FLAC__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 | ||
2213 | FLAC__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 | ||
2239 | FLAC__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 | ||
2265 | 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) | |
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 | ||
2303 | 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) | |
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 | ||
2355 | FLAC__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 | ||
2424 | FLAC__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 | ||
2470 | static FLAC__Metadata_SimpleIteratorStatus read_metadata_block_data_picture_cstring_cb_(FLAC__IOHandle handle, FLAC__IOCallback_Read read_cb, FLAC__byte **data, FLAC__uint32 *length, FLAC__uint32 length_len) | |
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 | ||
2501 | FLAC__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 | ||
2556 | FLAC__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 | ||
2572 | FLAC__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 | ||
2585 | FLAC__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 | ||
2600 | FLAC__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 | ||
2618 | FLAC__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 | ||
2642 | FLAC__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 | ||
2669 | FLAC__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 | ||
2690 | FLAC__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 | ||
2705 | FLAC__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 | ||
2722 | FLAC__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 | ||
2752 | FLAC__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 | ||
2846 | FLAC__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 | ||
2920 | FLAC__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 | ||
2928 | FLAC__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 | ||
2949 | FLAC__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 | ||
2992 | FLAC__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 | ||
3043 | void 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 | ||
3050 | FLAC__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 | */ | |
3068 | unsigned 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 | ||
3118 | unsigned 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 | ||
3123 | FLAC__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 | ||
3143 | 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) | |
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 | ||
3222 | FLAC__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 | ||
3244 | 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) | |
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 | ||
3266 | FLAC__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 | ||
3286 | 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) | |
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 | ||
3306 | static int | |
3307 | local_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 | ||
3333 | FLAC__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 | ||
3369 | FLAC__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 | ||
3402 | void 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 | ||
3416 | FLAC__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 | ||
3423 | void 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); | |
80d8f7fd | 3433 | #if !defined _3DS |
ce188d4d | 3434 | (void)flac_utime(filename, &srctime); |
80d8f7fd JW |
3435 | #endif |
3436 | ||
ce188d4d | 3437 | #if !defined _MSC_VER && !defined __BORLANDC__ && !defined __MINGW32__ |
3438 | FLAC_CHECK_RETURN(chown(filename, stats->st_uid, -1)); | |
3439 | FLAC_CHECK_RETURN(chown(filename, -1, stats->st_gid)); | |
3440 | #endif | |
3441 | } | |
3442 | ||
3443 | int fseek_wrapper_(FLAC__IOHandle handle, FLAC__int64 offset, int whence) | |
3444 | { | |
3445 | return fseeko((FILE*)handle, (FLAC__off_t)offset, whence); | |
3446 | } | |
3447 | ||
3448 | FLAC__int64 ftell_wrapper_(FLAC__IOHandle handle) | |
3449 | { | |
3450 | return ftello((FILE*)handle); | |
3451 | } | |
3452 | ||
3453 | FLAC__Metadata_ChainStatus get_equivalent_status_(FLAC__Metadata_SimpleIteratorStatus status) | |
3454 | { | |
3455 | switch(status) { | |
3456 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_OK: | |
3457 | return FLAC__METADATA_CHAIN_STATUS_OK; | |
3458 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT: | |
3459 | return FLAC__METADATA_CHAIN_STATUS_ILLEGAL_INPUT; | |
3460 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ERROR_OPENING_FILE: | |
3461 | return FLAC__METADATA_CHAIN_STATUS_ERROR_OPENING_FILE; | |
3462 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_A_FLAC_FILE: | |
3463 | return FLAC__METADATA_CHAIN_STATUS_NOT_A_FLAC_FILE; | |
3464 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_NOT_WRITABLE: | |
3465 | return FLAC__METADATA_CHAIN_STATUS_NOT_WRITABLE; | |
3466 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_BAD_METADATA: | |
3467 | return FLAC__METADATA_CHAIN_STATUS_BAD_METADATA; | |
3468 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_READ_ERROR: | |
3469 | return FLAC__METADATA_CHAIN_STATUS_READ_ERROR; | |
3470 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_SEEK_ERROR: | |
3471 | return FLAC__METADATA_CHAIN_STATUS_SEEK_ERROR; | |
3472 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_WRITE_ERROR: | |
3473 | return FLAC__METADATA_CHAIN_STATUS_WRITE_ERROR; | |
3474 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_RENAME_ERROR: | |
3475 | return FLAC__METADATA_CHAIN_STATUS_RENAME_ERROR; | |
3476 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_UNLINK_ERROR: | |
3477 | return FLAC__METADATA_CHAIN_STATUS_UNLINK_ERROR; | |
3478 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_MEMORY_ALLOCATION_ERROR: | |
3479 | return FLAC__METADATA_CHAIN_STATUS_MEMORY_ALLOCATION_ERROR; | |
3480 | case FLAC__METADATA_SIMPLE_ITERATOR_STATUS_INTERNAL_ERROR: | |
3481 | default: | |
3482 | return FLAC__METADATA_CHAIN_STATUS_INTERNAL_ERROR; | |
3483 | } | |
3484 | } |