FFmpeg
seek_utils.c
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1 /*
2  * Copyright (c) 2022 Pierre-Anthony Lemieux <pal@palemieux.com>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "libavformat/demux.h"
22 
23 int main(void)
24 {
25  int64_t ts_min;
26  int64_t ts;
27  int64_t ts_max;
28 
29  ts_min = 10;
30  ts = 20;
31  ts_max = 30;
32 
33  ff_rescale_interval(av_make_q(1, 1), av_make_q(10, 1), &ts_min, &ts, &ts_max);
34 
35  if (ts_min != 1 || ts != 2 || ts_max != 3)
36  return 1;
37 
38  ts_min = 10;
39  ts = 32;
40  ts_max = 32;
41 
42  ff_rescale_interval(av_make_q(1, 1), av_make_q(3, 1), &ts_min, &ts, &ts_max);
43 
44  if (ts_min != 4 || ts != 11 || ts_max != 10)
45  return 1;
46 
47  ts_min = 10;
48  ts = 10;
49  ts_max = 32;
50 
51  ff_rescale_interval(av_make_q(1, 1), av_make_q(3, 1), &ts_min, &ts, &ts_max);
52 
53  if (ts_min != 4 || ts != 3 || ts_max != 10)
54  return 1;
55 
56  return 0;
57 }
ff_rescale_interval
void ff_rescale_interval(AVRational tb_in, AVRational tb_out, int64_t *min_ts, int64_t *ts, int64_t *max_ts)
Rescales a timestamp and the endpoints of an interval to which the temstamp belongs,...
Definition: seek.c:763
av_make_q
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
demux.h
main
int main(void)
Definition: seek_utils.c:23