seektable.c
资源名称:tcpmp.rar [点击查看]
上传用户:wstnjxml
上传日期:2014-04-03
资源大小:7248k
文件大小:3k
源码类别:
Windows CE
开发平台:
C/C++
- /* grabbag - Convenience lib for various routines common to several tools
- * Copyright (C) 2002,2003,2004,2005 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.
- */
- #include "share/grabbag.h"
- #include "FLAC/assert.h"
- #include <stdlib.h> /* for atoi() */
- #include <string.h>
- FLAC__bool grabbag__seektable_convert_specification_to_template(const char *spec, FLAC__bool only_explicit_placeholders, FLAC__uint64 total_samples_to_encode, unsigned sample_rate, FLAC__StreamMetadata *seektable_template, FLAC__bool *spec_has_real_points)
- {
- unsigned i;
- const char *pt;
- FLAC__ASSERT(0 != spec);
- FLAC__ASSERT(0 != seektable_template);
- FLAC__ASSERT(seektable_template->type = FLAC__METADATA_TYPE_SEEKTABLE);
- if(0 != spec_has_real_points)
- *spec_has_real_points = false;
- for(pt = spec, i = 0; pt && *pt; i++) {
- const char *q = strchr(pt, ';');
- FLAC__ASSERT(0 != q);
- if(q > pt) {
- if(0 == strncmp(pt, "X;", 2)) { /* -S X */
- if(!FLAC__metadata_object_seektable_template_append_placeholders(seektable_template, 1))
- return false;
- }
- else if(q[-1] == 'x') { /* -S #x */
- if(total_samples_to_encode > 0) { /* we can only do these if we know the number of samples to encode up front */
- if(0 != spec_has_real_points)
- *spec_has_real_points = true;
- if(!only_explicit_placeholders) {
- if(!FLAC__metadata_object_seektable_template_append_spaced_points(seektable_template, atoi(pt), total_samples_to_encode))
- return false;
- }
- }
- }
- else if(q[-1] == 's') { /* -S #s */
- if(total_samples_to_encode > 0) { /* we can only do these if we know the number of samples to encode up front */
- FLAC__ASSERT(sample_rate > 0);
- if(0 != spec_has_real_points)
- *spec_has_real_points = true;
- if(!only_explicit_placeholders) {
- double sec = atof(pt);
- if(sec > 0.0) {
- #if defined _MSC_VER || defined __MINGW32__
- /* with MSVC you have to spoon feed it the casting */
- unsigned n = (unsigned)((double)(FLAC__int64)total_samples_to_encode / (sec * (double)sample_rate));
- #else
- unsigned n = (unsigned)((double)total_samples_to_encode / (sec * (double)sample_rate));
- #endif
- if(!FLAC__metadata_object_seektable_template_append_spaced_points(seektable_template, n, total_samples_to_encode))
- return false;
- }
- }
- }
- }
- else { /* -S # */
- if(0 != spec_has_real_points)
- *spec_has_real_points = true;
- if(!only_explicit_placeholders) {
- FLAC__uint64 n = (unsigned)atoi(pt);
- if(!FLAC__metadata_object_seektable_template_append_point(seektable_template, n))
- return false;
- }
- }
- }
- pt = ++q;
- }
- if(!FLAC__metadata_object_seektable_template_sort(seektable_template, /*compact=*/true))
- return false;
- return true;
- }