1 /* flac - Command-line FLAC encoder/decoder
2 * Copyright (C) 2002,2003,2004,2005,2006 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"
30 int flac__utils_verbosity_ = 2;
32 static FLAC__bool local__parse_uint64_(const char *s, FLAC__uint64 *value)
40 while('\0' != (c = *s++))
41 if(c >= '0' && c <= '9')
42 ret = ret * 10 + (c - '0');
50 static FLAC__bool local__parse_timecode_(const char *s, double *value)
56 /* parse [0-9][0-9]*: */
58 if(c >= '0' && c <= '9')
62 while(':' != (c = *s++)) {
63 if(c >= '0' && c <= '9')
64 i = i * 10 + (c - '0');
68 ret = (double)i * 60.;
70 /* parse [0-9]*[.]?[0-9]* i.e. a sign-less rational number */
71 if(strspn(s, "1234567890.") != strlen(s))
74 const char *p = strchr(s, '.');
75 if(p && 0 != strchr(++p, '.'))
84 static FLAC__bool local__parse_cue_(const char *s, const char *end, unsigned *track, unsigned *index)
86 FLAC__bool got_track = false, got_index = false;
87 unsigned t = 0, i = 0;
90 while(end? s < end : *s != '\0') {
92 if(c >= '0' && c <= '9') {
93 t = t * 10 + (c - '0');
101 while(end? s < end : *s != '\0') {
103 if(c >= '0' && c <= '9') {
104 i = i * 10 + (c - '0');
112 return got_track && got_index;
116 * this only works with sorted cuesheets (the spec strongly recommends but
117 * does not require sorted cuesheets). but if it's not sorted, picking a
118 * nearest cue point has no significance.
120 static FLAC__uint64 local__find_closest_cue_(const FLAC__StreamMetadata_CueSheet *cuesheet, unsigned track, unsigned index, FLAC__uint64 total_samples, FLAC__bool look_forward)
124 for(t = 0; t < (int)cuesheet->num_tracks; t++)
125 for(i = 0; i < (int)cuesheet->tracks[t].num_indices; i++)
126 if(cuesheet->tracks[t].number > track || (cuesheet->tracks[t].number == track && cuesheet->tracks[t].indices[i].number >= index))
127 return cuesheet->tracks[t].offset + cuesheet->tracks[t].indices[i].offset;
128 return total_samples;
131 for(t = (int)cuesheet->num_tracks - 1; t >= 0; t--)
132 for(i = (int)cuesheet->tracks[t].num_indices - 1; i >= 0; i--)
133 if(cuesheet->tracks[t].number < track || (cuesheet->tracks[t].number == track && cuesheet->tracks[t].indices[i].number <= index))
134 return cuesheet->tracks[t].offset + cuesheet->tracks[t].indices[i].offset;
139 void flac__utils_printf(FILE *stream, int level, const char *format, ...)
141 if(flac__utils_verbosity_ >= level) {
144 FLAC__ASSERT(0 != format);
146 va_start(args, format);
148 (void) vfprintf(stream, format, args);
154 #ifdef FLAC__VALGRIND_TESTING
155 size_t flac__utils_fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
157 size_t ret = fwrite(ptr, size, nmemb, stream);
164 FLAC__bool flac__utils_parse_skip_until_specification(const char *s, utils__SkipUntilSpecification *spec)
167 FLAC__bool is_negative = false;
169 FLAC__ASSERT(0 != spec);
171 spec->is_relative = false;
172 spec->value_is_samples = true;
173 spec->value.samples = 0;
178 spec->is_relative = true;
181 else if(s[0] == '+') {
182 spec->is_relative = true;
186 if(local__parse_uint64_(s, &val)) {
187 spec->value_is_samples = true;
188 spec->value.samples = (FLAC__int64)val;
190 spec->value.samples = -(spec->value.samples);
194 if(!local__parse_timecode_(s, &d))
196 spec->value_is_samples = false;
197 spec->value.seconds = d;
199 spec->value.seconds = -(spec->value.seconds);
206 void flac__utils_canonicalize_skip_until_specification(utils__SkipUntilSpecification *spec, unsigned sample_rate)
208 FLAC__ASSERT(0 != spec);
209 if(!spec->value_is_samples) {
210 spec->value.samples = (FLAC__int64)(spec->value.seconds * (double)sample_rate);
211 spec->value_is_samples = true;
215 FLAC__bool flac__utils_parse_cue_specification(const char *s, utils__CueSpecification *spec)
217 const char *start = s, *end = 0;
219 FLAC__ASSERT(0 != spec);
221 spec->has_start_point = spec->has_end_point = false;
234 if(!local__parse_cue_(start, s, &spec->start_track, &spec->start_index))
236 spec->has_start_point = true;
240 if(!local__parse_cue_(end, 0, &spec->end_track, &spec->end_index))
242 spec->has_end_point = true;
248 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)
250 FLAC__ASSERT(0 != cue_spec);
251 FLAC__ASSERT(0 != cuesheet);
252 FLAC__ASSERT(0 != total_samples);
253 FLAC__ASSERT(0 != skip_spec);
254 FLAC__ASSERT(0 != until_spec);
256 skip_spec->is_relative = false;
257 skip_spec->value_is_samples = true;
259 until_spec->is_relative = false;
260 until_spec->value_is_samples = true;
262 if(cue_spec->has_start_point)
263 skip_spec->value.samples = local__find_closest_cue_(cuesheet, cue_spec->start_track, cue_spec->start_index, total_samples, /*look_forward=*/false);
265 skip_spec->value.samples = 0;
267 if(cue_spec->has_end_point)
268 until_spec->value.samples = local__find_closest_cue_(cuesheet, cue_spec->end_track, cue_spec->end_index, total_samples, /*look_forward=*/true);
270 until_spec->value.samples = total_samples;