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-rw-r--r--3rdparty/libflac/src/flac/utils.c316
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diff --git a/3rdparty/libflac/src/flac/utils.c b/3rdparty/libflac/src/flac/utils.c
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+/* flac - Command-line FLAC encoder/decoder
+ * Copyright (C) 2002,2003,2004,2005,2006,2007 Josh Coalson
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "utils.h"
+#include "FLAC/assert.h"
+#include "FLAC/metadata.h"
+#include <math.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+const char *CHANNEL_MASK_TAG = "WAVEFORMATEXTENSIBLE_CHANNEL_MASK";
+
+int flac__utils_verbosity_ = 2;
+
+static FLAC__bool local__parse_uint64_(const char *s, FLAC__uint64 *value)
+{
+ FLAC__uint64 ret = 0;
+ char c;
+
+ if(*s == '\0')
+ return false;
+
+ while('\0' != (c = *s++))
+ if(c >= '0' && c <= '9')
+ ret = ret * 10 + (c - '0');
+ else
+ return false;
+
+ *value = ret;
+ return true;
+}
+
+static FLAC__bool local__parse_timecode_(const char *s, double *value)
+{
+ double ret;
+ unsigned i;
+ char c;
+
+ /* parse [0-9][0-9]*: */
+ c = *s++;
+ if(c >= '0' && c <= '9')
+ i = (c - '0');
+ else
+ return false;
+ while(':' != (c = *s++)) {
+ if(c >= '0' && c <= '9')
+ i = i * 10 + (c - '0');
+ else
+ return false;
+ }
+ ret = (double)i * 60.;
+
+ /* parse [0-9]*[.,]?[0-9]* i.e. a sign-less rational number (. or , OK for fractional seconds, to support different locales) */
+ if(strspn(s, "1234567890.,") != strlen(s))
+ return false;
+ {
+ const char *p = strpbrk(s, ".,");
+ if(p && 0 != strpbrk(++p, ".,"))
+ return false;
+ }
+ ret += atof(s);
+
+ *value = ret;
+ return true;
+}
+
+static FLAC__bool local__parse_cue_(const char *s, const char *end, unsigned *track, unsigned *index)
+{
+ FLAC__bool got_track = false, got_index = false;
+ unsigned t = 0, i = 0;
+ char c;
+
+ while(end? s < end : *s != '\0') {
+ c = *s++;
+ if(c >= '0' && c <= '9') {
+ t = t * 10 + (c - '0');
+ got_track = true;
+ }
+ else if(c == '.')
+ break;
+ else
+ return false;
+ }
+ while(end? s < end : *s != '\0') {
+ c = *s++;
+ if(c >= '0' && c <= '9') {
+ i = i * 10 + (c - '0');
+ got_index = true;
+ }
+ else
+ return false;
+ }
+ *track = t;
+ *index = i;
+ return got_track && got_index;
+}
+
+/*
+ * this only works with sorted cuesheets (the spec strongly recommends but
+ * does not require sorted cuesheets). but if it's not sorted, picking a
+ * nearest cue point has no significance.
+ */
+static FLAC__uint64 local__find_closest_cue_(const FLAC__StreamMetadata_CueSheet *cuesheet, unsigned track, unsigned index, FLAC__uint64 total_samples, FLAC__bool look_forward)
+{
+ int t, i;
+ if(look_forward) {
+ for(t = 0; t < (int)cuesheet->num_tracks; t++)
+ for(i = 0; i < (int)cuesheet->tracks[t].num_indices; i++)
+ if(cuesheet->tracks[t].number > track || (cuesheet->tracks[t].number == track && cuesheet->tracks[t].indices[i].number >= index))
+ return cuesheet->tracks[t].offset + cuesheet->tracks[t].indices[i].offset;
+ return total_samples;
+ }
+ else {
+ for(t = (int)cuesheet->num_tracks - 1; t >= 0; t--)
+ for(i = (int)cuesheet->tracks[t].num_indices - 1; i >= 0; i--)
+ if(cuesheet->tracks[t].number < track || (cuesheet->tracks[t].number == track && cuesheet->tracks[t].indices[i].number <= index))
+ return cuesheet->tracks[t].offset + cuesheet->tracks[t].indices[i].offset;
+ return 0;
+ }
+}
+
+void flac__utils_printf(FILE *stream, int level, const char *format, ...)
+{
+ if(flac__utils_verbosity_ >= level) {
+ va_list args;
+
+ FLAC__ASSERT(0 != format);
+
+ va_start(args, format);
+
+ (void) vfprintf(stream, format, args);
+
+ va_end(args);
+ }
+}
+
+#ifdef FLAC__VALGRIND_TESTING
+size_t flac__utils_fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
+{
+ size_t ret = fwrite(ptr, size, nmemb, stream);
+ if(!ferror(stream))
+ fflush(stream);
+ return ret;
+}
+#endif
+
+FLAC__bool flac__utils_parse_skip_until_specification(const char *s, utils__SkipUntilSpecification *spec)
+{
+ FLAC__uint64 val;
+ FLAC__bool is_negative = false;
+
+ FLAC__ASSERT(0 != spec);
+
+ spec->is_relative = false;
+ spec->value_is_samples = true;
+ spec->value.samples = 0;
+
+ if(0 != s) {
+ if(s[0] == '-') {
+ is_negative = true;
+ spec->is_relative = true;
+ s++;
+ }
+ else if(s[0] == '+') {
+ spec->is_relative = true;
+ s++;
+ }
+
+ if(local__parse_uint64_(s, &val)) {
+ spec->value_is_samples = true;
+ spec->value.samples = (FLAC__int64)val;
+ if(is_negative)
+ spec->value.samples = -(spec->value.samples);
+ }
+ else {
+ double d;
+ if(!local__parse_timecode_(s, &d))
+ return false;
+ spec->value_is_samples = false;
+ spec->value.seconds = d;
+ if(is_negative)
+ spec->value.seconds = -(spec->value.seconds);
+ }
+ }
+
+ return true;
+}
+
+void flac__utils_canonicalize_skip_until_specification(utils__SkipUntilSpecification *spec, unsigned sample_rate)
+{
+ FLAC__ASSERT(0 != spec);
+ if(!spec->value_is_samples) {
+ spec->value.samples = (FLAC__int64)(spec->value.seconds * (double)sample_rate);
+ spec->value_is_samples = true;
+ }
+}
+
+FLAC__bool flac__utils_parse_cue_specification(const char *s, utils__CueSpecification *spec)
+{
+ const char *start = s, *end = 0;
+
+ FLAC__ASSERT(0 != spec);
+
+ spec->has_start_point = spec->has_end_point = false;
+
+ s = strchr(s, '-');
+
+ if(0 != s) {
+ if(s == start)
+ start = 0;
+ end = s+1;
+ if(*end == '\0')
+ end = 0;
+ }
+
+ if(start) {
+ if(!local__parse_cue_(start, s, &spec->start_track, &spec->start_index))
+ return false;
+ spec->has_start_point = true;
+ }
+
+ if(end) {
+ if(!local__parse_cue_(end, 0, &spec->end_track, &spec->end_index))
+ return false;
+ spec->has_end_point = true;
+ }
+
+ return true;
+}
+
+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)
+{
+ FLAC__ASSERT(0 != cue_spec);
+ FLAC__ASSERT(0 != cuesheet);
+ FLAC__ASSERT(0 != total_samples);
+ FLAC__ASSERT(0 != skip_spec);
+ FLAC__ASSERT(0 != until_spec);
+
+ skip_spec->is_relative = false;
+ skip_spec->value_is_samples = true;
+
+ until_spec->is_relative = false;
+ until_spec->value_is_samples = true;
+
+ if(cue_spec->has_start_point)
+ skip_spec->value.samples = local__find_closest_cue_(cuesheet, cue_spec->start_track, cue_spec->start_index, total_samples, /*look_forward=*/false);
+ else
+ skip_spec->value.samples = 0;
+
+ if(cue_spec->has_end_point)
+ until_spec->value.samples = local__find_closest_cue_(cuesheet, cue_spec->end_track, cue_spec->end_index, total_samples, /*look_forward=*/true);
+ else
+ until_spec->value.samples = total_samples;
+}
+
+FLAC__bool flac__utils_set_channel_mask_tag(FLAC__StreamMetadata *object, FLAC__uint32 channel_mask)
+{
+ FLAC__StreamMetadata_VorbisComment_Entry entry = { 0, 0 };
+ char tag[128];
+
+ FLAC__ASSERT(object);
+ FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
+ FLAC__ASSERT(strlen(CHANNEL_MASK_TAG+1+2+16+1) <= sizeof(tag)); /* +1 for =, +2 for 0x, +16 for digits, +1 for NUL */
+ entry.entry = (FLAC__byte*)tag;
+#if defined _MSC_VER || defined __MINGW32__
+ if((entry.length = _snprintf(tag, sizeof(tag), "%s=0x%04X", CHANNEL_MASK_TAG, (unsigned)channel_mask)) >= sizeof(tag))
+#else
+ if((entry.length = snprintf(tag, sizeof(tag), "%s=0x%04X", CHANNEL_MASK_TAG, (unsigned)channel_mask)) >= sizeof(tag))
+#endif
+ return false;
+ if(!FLAC__metadata_object_vorbiscomment_replace_comment(object, entry, /*all=*/true, /*copy=*/true))
+ return false;
+ return true;
+}
+
+FLAC__bool flac__utils_get_channel_mask_tag(const FLAC__StreamMetadata *object, FLAC__uint32 *channel_mask)
+{
+ int offset;
+ unsigned val;
+ char *p;
+ FLAC__ASSERT(object);
+ FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
+ if(0 > (offset = FLAC__metadata_object_vorbiscomment_find_entry_from(object, /*offset=*/0, CHANNEL_MASK_TAG)))
+ return false;
+ if(object->data.vorbis_comment.comments[offset].length < strlen(CHANNEL_MASK_TAG)+4)
+ return false;
+ if(0 == (p = strchr((const char *)object->data.vorbis_comment.comments[offset].entry, '='))) /* should never happen, but just in case */
+ return false;
+ if(strncmp(p, "=0x", 3))
+ return false;
+ if(sscanf(p+3, "%x", &val) != 1)
+ return false;
+ *channel_mask = val;
+ return true;
+}