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Viewing changes to src/share/grabbag/seektable.c

  • Committer: Bazaar Package Importer
  • Author(s): Matt Zimmerman
  • Date: 2004-04-16 15:14:31 UTC
  • mfrom: (1.1.1 upstream)
  • Revision ID: james.westby@ubuntu.com-20040416151431-eyloggqxpwbwpogz
Tags: 1.1.0-11
Ensure that libFLAC is linked with -lm on all architectures, and
regardless of whether nasm is present

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src/share/grabbag/seektable.c
 
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/* grabbag - Convenience lib for various routines common to several tools
 
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 * Copyright (C) 2002,2003  Josh Coalson
 
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 *
 
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 * This program is free software; you can redistribute it and/or
 
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 * modify it under the terms of the GNU General Public License
 
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 * as published by the Free Software Foundation; either version 2
 
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 * of the License, or (at your option) any later version.
 
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 *
 
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 * This program is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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 * GNU General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU General Public License
 
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 * along with this program; if not, write to the Free Software
 
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
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 */
 
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#include "share/grabbag.h"
 
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#include "FLAC/assert.h"
 
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#include <stdlib.h> /* for atoi() */
 
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#include <string.h>
 
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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)
 
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{
 
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        unsigned i;
 
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        const char *pt;
 
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        FLAC__ASSERT(0 != spec);
 
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        FLAC__ASSERT(0 != seektable_template);
 
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        FLAC__ASSERT(seektable_template->type = FLAC__METADATA_TYPE_SEEKTABLE);
 
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        if(0 != spec_has_real_points)
 
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                *spec_has_real_points = false;
 
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        for(pt = spec, i = 0; pt && *pt; i++) {
 
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                const char *q = strchr(pt, ';');
 
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                FLAC__ASSERT(0 != q);
 
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                if(q > pt) {
 
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                        if(0 == strncmp(pt, "X;", 2)) { /* -S X */
 
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                                if(!FLAC__metadata_object_seektable_template_append_placeholders(seektable_template, 1))
 
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                                        return false;
 
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                        }
 
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                        else if(q[-1] == 'x') { /* -S #x */
 
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                                if(total_samples_to_encode > 0) { /* we can only do these if we know the number of samples to encode up front */
 
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                                        if(0 != spec_has_real_points)
 
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                                                *spec_has_real_points = true;
 
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                                        if(!only_explicit_placeholders) {
 
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                                                if(!FLAC__metadata_object_seektable_template_append_spaced_points(seektable_template, atoi(pt), total_samples_to_encode))
 
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                                                        return false;
 
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                                        }
 
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                                }
 
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                        }
 
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                        else if(q[-1] == 's') { /* -S #s */
 
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                                if(total_samples_to_encode > 0) { /* we can only do these if we know the number of samples to encode up front */
 
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                                        FLAC__ASSERT(sample_rate > 0);
 
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                                        if(0 != spec_has_real_points)
 
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                                                *spec_has_real_points = true;
 
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                                        if(!only_explicit_placeholders) {
 
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                                                double sec = atof(pt);
 
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                                                if(sec > 0.0) {
 
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#if defined _MSC_VER || defined __MINGW32__
 
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                                                        /* with VC++ you have to spoon feed it the casting */
 
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                                                        unsigned n = (unsigned)((double)(FLAC__int64)total_samples_to_encode / (sec * (double)sample_rate));
 
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#else
 
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                                                        unsigned n = (unsigned)((double)total_samples_to_encode / (sec * (double)sample_rate));
 
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#endif
 
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                                                        if(!FLAC__metadata_object_seektable_template_append_spaced_points(seektable_template, n, total_samples_to_encode))
 
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                                                                return false;
 
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                                                }
 
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                                        }
 
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                                }
 
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                        }
 
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                        else { /* -S # */
 
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                                if(0 != spec_has_real_points)
 
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                                        *spec_has_real_points = true;
 
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                                if(!only_explicit_placeholders) {
 
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                                        FLAC__uint64 n = (unsigned)atoi(pt);
 
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                                        if(!FLAC__metadata_object_seektable_template_append_point(seektable_template, n))
 
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                                                return false;
 
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                                }
 
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                        }
 
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                }
 
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                pt = ++q;
 
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        }
 
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        if(!FLAC__metadata_object_seektable_template_sort(seektable_template, /*compact=*/true))
 
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                return false;
 
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        return true;
 
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}