1 /* flac - Command-line FLAC encoder/decoder
2 * Copyright (C) 2002,2003,2004,2005,2006,2007 Josh Coalson
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 #include "flac/assert.h"
25 #include "flac/metadata.h"
32 const char *CHANNEL_MASK_TAG = "WAVEFORMATEXTENSIBLE_CHANNEL_MASK";
34 int flac__utils_verbosity_ = 2;
36 static FLAC__bool local__parse_uint64_(const char *s, FLAC__uint64 *value)
44 while('\0' != (c = *s++))
45 if(c >= '0' && c <= '9')
46 ret = ret * 10 + (c - '0');
54 static FLAC__bool local__parse_timecode_(const char *s, double *value)
60 /* parse [0-9][0-9]*: */
62 if(c >= '0' && c <= '9')
66 while(':' != (c = *s++)) {
67 if(c >= '0' && c <= '9')
68 i = i * 10 + (c - '0');
72 ret = (double)i * 60.;
74 /* parse [0-9]*[.,]?[0-9]* i.e. a sign-less rational number (. or , OK for fractional seconds, to support different locales) */
75 if(strspn(s, "1234567890.,") != strlen(s))
78 const char *p = strpbrk(s, ".,");
79 if(p && 0 != strpbrk(++p, ".,"))
88 static FLAC__bool local__parse_cue_(const char *s, const char *end, unsigned *track, unsigned *index)
90 FLAC__bool got_track = false, got_index = false;
91 unsigned t = 0, i = 0;
94 while(end? s < end : *s != '\0') {
96 if(c >= '0' && c <= '9') {
97 t = t * 10 + (c - '0');
105 while(end? s < end : *s != '\0') {
107 if(c >= '0' && c <= '9') {
108 i = i * 10 + (c - '0');
116 return got_track && got_index;
120 * this only works with sorted cuesheets (the spec strongly recommends but
121 * does not require sorted cuesheets). but if it's not sorted, picking a
122 * nearest cue point has no significance.
124 static FLAC__uint64 local__find_closest_cue_(const FLAC__StreamMetadata_CueSheet *cuesheet, unsigned track, unsigned index, FLAC__uint64 total_samples, FLAC__bool look_forward)
128 for(t = 0; t < (int)cuesheet->num_tracks; t++)
129 for(i = 0; i < (int)cuesheet->tracks[t].num_indices; i++)
130 if(cuesheet->tracks[t].number > track || (cuesheet->tracks[t].number == track && cuesheet->tracks[t].indices[i].number >= index))
131 return cuesheet->tracks[t].offset + cuesheet->tracks[t].indices[i].offset;
132 return total_samples;
135 for(t = (int)cuesheet->num_tracks - 1; t >= 0; t--)
136 for(i = (int)cuesheet->tracks[t].num_indices - 1; i >= 0; i--)
137 if(cuesheet->tracks[t].number < track || (cuesheet->tracks[t].number == track && cuesheet->tracks[t].indices[i].number <= index))
138 return cuesheet->tracks[t].offset + cuesheet->tracks[t].indices[i].offset;
143 void flac__utils_printf(FILE *stream, int level, const char *format, ...)
145 if(flac__utils_verbosity_ >= level) {
148 FLAC__ASSERT(0 != format);
150 va_start(args, format);
152 (void) vfprintf(stream, format, args);
158 #ifdef FLAC__VALGRIND_TESTING
159 size_t flac__utils_fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
161 size_t ret = fwrite(ptr, size, nmemb, stream);
168 FLAC__bool flac__utils_parse_skip_until_specification(const char *s, utils__SkipUntilSpecification *spec)
171 FLAC__bool is_negative = false;
173 FLAC__ASSERT(0 != spec);
175 spec->is_relative = false;
176 spec->value_is_samples = true;
177 spec->value.samples = 0;
182 spec->is_relative = true;
185 else if(s[0] == '+') {
186 spec->is_relative = true;
190 if(local__parse_uint64_(s, &val)) {
191 spec->value_is_samples = true;
192 spec->value.samples = (FLAC__int64)val;
194 spec->value.samples = -(spec->value.samples);
198 if(!local__parse_timecode_(s, &d))
200 spec->value_is_samples = false;
201 spec->value.seconds = d;
203 spec->value.seconds = -(spec->value.seconds);
210 void flac__utils_canonicalize_skip_until_specification(utils__SkipUntilSpecification *spec, unsigned sample_rate)
212 FLAC__ASSERT(0 != spec);
213 if(!spec->value_is_samples) {
214 spec->value.samples = (FLAC__int64)(spec->value.seconds * (double)sample_rate);
215 spec->value_is_samples = true;
219 FLAC__bool flac__utils_parse_cue_specification(const char *s, utils__CueSpecification *spec)
221 const char *start = s, *end = 0;
223 FLAC__ASSERT(0 != spec);
225 spec->has_start_point = spec->has_end_point = false;
238 if(!local__parse_cue_(start, s, &spec->start_track, &spec->start_index))
240 spec->has_start_point = true;
244 if(!local__parse_cue_(end, 0, &spec->end_track, &spec->end_index))
246 spec->has_end_point = true;
252 void flac__utils_canonicalize_cue_specification(const utils__CueSpecification *cue_spec, const FLAC__StreamMetadata_CueSheet *cuesheet, FLAC__uint64 total_samples, utils__SkipUntilSpecification *skip_spec, utils__SkipUntilSpecification *until_spec)
254 FLAC__ASSERT(0 != cue_spec);
255 FLAC__ASSERT(0 != cuesheet);
256 FLAC__ASSERT(0 != total_samples);
257 FLAC__ASSERT(0 != skip_spec);
258 FLAC__ASSERT(0 != until_spec);
260 skip_spec->is_relative = false;
261 skip_spec->value_is_samples = true;
263 until_spec->is_relative = false;
264 until_spec->value_is_samples = true;
266 if(cue_spec->has_start_point)
267 skip_spec->value.samples = local__find_closest_cue_(cuesheet, cue_spec->start_track, cue_spec->start_index, total_samples, /*look_forward=*/false);
269 skip_spec->value.samples = 0;
271 if(cue_spec->has_end_point)
272 until_spec->value.samples = local__find_closest_cue_(cuesheet, cue_spec->end_track, cue_spec->end_index, total_samples, /*look_forward=*/true);
274 until_spec->value.samples = total_samples;
277 FLAC__bool flac__utils_set_channel_mask_tag(FLAC__StreamMetadata *object, FLAC__uint32 channel_mask)
279 FLAC__StreamMetadata_VorbisComment_Entry entry = { 0, 0 };
282 FLAC__ASSERT(object);
283 FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
284 FLAC__ASSERT(strlen(CHANNEL_MASK_TAG+1+2+16+1) <= sizeof(tag)); /* +1 for =, +2 for 0x, +16 for digits, +1 for NUL */
285 entry.entry = (FLAC__byte*)tag;
286 #if defined _MSC_VER || defined __MINGW32__
287 if((entry.length = _snprintf(tag, sizeof(tag), "%s=0x%04X", CHANNEL_MASK_TAG, (unsigned)channel_mask)) >= sizeof(tag))
289 if((entry.length = snprintf(tag, sizeof(tag), "%s=0x%04X", CHANNEL_MASK_TAG, (unsigned)channel_mask)) >= sizeof(tag))
292 if(!FLAC__metadata_object_vorbiscomment_replace_comment(object, entry, /*all=*/true, /*copy=*/true))
297 FLAC__bool flac__utils_get_channel_mask_tag(const FLAC__StreamMetadata *object, FLAC__uint32 *channel_mask)
302 FLAC__ASSERT(object);
303 FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
304 if(0 > (offset = FLAC__metadata_object_vorbiscomment_find_entry_from(object, /*offset=*/0, CHANNEL_MASK_TAG)))
306 if(object->data.vorbis_comment.comments[offset].length < strlen(CHANNEL_MASK_TAG)+4)
308 if(0 == (p = strchr((const char *)object->data.vorbis_comment.comments[offset].entry, '='))) /* should never happen, but just in case */
310 if(strncmp(p, "=0x", 3))
312 if(sscanf(p+3, "%x", &val) != 1)