| /* grabbag - Convenience lib for various routines common to several tools |
| * Copyright (C) 2002,2003,2004,2005,2006 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; |
| } |