Line data    Source code

       1              : /*
       2              :  *                      GPAC - Multimedia Framework C SDK
       3              :  *
       4              :  *                      Authors: Deniz Ugur, Romain Bouqueau, Sohaib Larbi
       5              :  *                      Copyright (c) Motion Spell
       6              :  *                              All rights reserved
       7              :  *
       8              :  *  This file is part of the GPAC/GStreamer wrapper
       9              :  *
      10              :  *  This GPAC/GStreamer wrapper is free software; you can redistribute it
      11              :  *  and/or modify it under the terms of the GNU Affero General Public License
      12              :  *  as published by the Free Software Foundation; either version 3, or (at
      13              :  *  your option) any later version.
      14              :  *
      15              :  *  This GPAC/GStreamer wrapper is distributed in the hope that it will be
      16              :  *  useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
      17              :  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      18              :  *  GNU Affero General Public License for more details.
      19              :  *
      20              :  *  You should have received a copy of the GNU Affero General Public
      21              :  *  License along with this library; see the file LICENSE.  If not, write to
      22              :  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
      23              :  *
      24              :  */
      25              : 
      26              : #include "lib/time.h"
      27              : 
      28              : guint64
      29        19593 : gpac_time_rescale_with_fps(GstClockTime time,
      30              :                            GF_Fraction fps,
      31              :                            guint64 desired_timescale)
      32              : {
      33        19593 :   if (!GST_CLOCK_TIME_IS_VALID(time) || !desired_timescale)
      34            3 :     return 0;
      35              : 
      36              :   // Timescale is already in the desired timescale
      37        19590 :   if (GST_SECOND == desired_timescale)
      38            0 :     return time;
      39              : 
      40              :   // Calculate the frame duration in GST_SECOND
      41        19590 :   guint64 frame_duration = gf_timestamp_rescale(GST_SECOND, fps.num, fps.den);
      42              : 
      43              :   // Convert the given time to the desired timescale
      44              :   guint64 frame_tick =
      45        19590 :     gf_timestamp_rescale(desired_timescale, fps.num, fps.den);
      46              :   guint64 rescaled_time =
      47        19590 :     gf_timestamp_rescale(time, frame_duration, frame_tick);
      48              : 
      49        19590 :   return rescaled_time;
      50              : }