research.m1stereo.tv/gitweb/ - omnplay/blob - src/timecode.c

   1 /*
   2  * timecode.c -- GTK+ 2 omnplay
   3  * Copyright (C) 2011 Maksym Veremeyenko <verem@m1stereo.tv>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software Foundation,
  17  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include <stdio.h>
  21
  22 char* frames2tc(int f, float fps, char* buf)
  23 {
  24     int tc[4] = { 0, 0, 0, 0 };
  25     float d;
  26     int t;
  27
  28     if ( fps && f >= 0)
  29     {
  30         d = f / fps;
  31         t = d;
  32
  33         tc[0] = (d - t) * fps;
  34         tc[1] = t % 60; t /= 60;
  35         tc[2] = t % 60; t /= 60;
  36         tc[3] = t % 24;
  37     }
  38
  39     sprintf(buf, "%.2d:%.2d:%.2d:%.2d", tc[3], tc[2], tc[1], tc[0]);
  40
  41     return buf;
  42 }
  43
  44
  45 int tc2frames(char* tc, float fps, int *f)
  46 {
  47     int hh, mm, ss, ff;
  48
  49     *f = 0;
  50
  51     if(4 != sscanf(tc, "%d:%d:%d:%d",
  52         &hh, &mm, &ss, &ff))
  53         return -1;
  54
  55     *f = ff + fps * (ss + 60 * (mm + 60 * hh));
  56
  57     return 0;
  58 }