ffmpeg/libavcodec/mpeg_er.c

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #include "error_resilience.h"
  20 #include "mpegvideo.h"
  21 #include "mpeg_er.h"
  22
  23 static void set_erpic(ERPicture *dst, Picture *src)
  24 {
  25     int i;
  26
  27     memset(dst, 0, sizeof(*dst));
  28     if (!src) {
  29         dst->f  = NULL;
  30         dst->tf = NULL;
  31         return;
  32     }
  33
  34     dst->f = src->f;
  35     dst->tf = &src->tf;
  36
  37     for (i = 0; i < 2; i++) {
  38         dst->motion_val[i] = src->motion_val[i];
  39         dst->ref_index[i] = src->ref_index[i];
  40     }
  41
  42     dst->mb_type = src->mb_type;
  43     dst->field_picture = src->field_picture;
  44 }
  45
  46 void ff_mpeg_er_frame_start(MpegEncContext *s)
  47 {
  48     ERContext *er = &s->er;
  49
  50     set_erpic(&er->cur_pic,  s->current_picture_ptr);
  51     set_erpic(&er->next_pic, s->next_picture_ptr);
  52     set_erpic(&er->last_pic, s->last_picture_ptr);
  53
  54     er->pp_time           = s->pp_time;
  55     er->pb_time           = s->pb_time;
  56     er->quarter_sample    = s->quarter_sample;
  57     er->partitioned_frame = s->partitioned_frame;
  58
  59     ff_er_frame_start(er);
  60 }