libmpcodecs/vf_harddup.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer 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
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22
  23 #include "config.h"
  24 #include "mp_msg.h"
  25
  26 #include "img_format.h"
  27 #include "mp_image.h"
  28 #include "vf.h"
  29
  30 struct vf_priv_s {
  31         mp_image_t *last_mpi;
  32 };
  33
  34 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
  35 {
  36         mp_image_t *dmpi;
  37
  38         vf->priv->last_mpi = mpi;
  39
  40         dmpi = vf_get_image(vf->next, mpi->imgfmt,
  41                 MP_IMGTYPE_EXPORT, 0, mpi->width, mpi->height);
  42
  43         dmpi->planes[0] = mpi->planes[0];
  44         dmpi->stride[0] = mpi->stride[0];
  45         if (dmpi->flags&MP_IMGFLAG_PLANAR) {
  46                 dmpi->planes[1] = mpi->planes[1];
  47                 dmpi->stride[1] = mpi->stride[1];
  48                 dmpi->planes[2] = mpi->planes[2];
  49                 dmpi->stride[2] = mpi->stride[2];
  50         }
  51
  52         return vf_next_put_image(vf, dmpi, pts);
  53 }
  54
  55 static int control(struct vf_instance *vf, int request, void* data)
  56 {
  57         switch (request) {
  58         case VFCTRL_DUPLICATE_FRAME:
  59                 if (!vf->priv->last_mpi) break;
  60                 // This is a huge hack. We assume nothing
  61                 // has been called earlier in the filter chain
  62                 // since the last put_image. This is reasonable
  63                 // because we're handling a duplicate frame!
  64                 if (put_image(vf, vf->priv->last_mpi, MP_NOPTS_VALUE))
  65                         return CONTROL_TRUE;
  66                 break;
  67         }
  68         return vf_next_control(vf, request, data);
  69 }
  70
  71 static void uninit(struct vf_instance *vf)
  72 {
  73         free(vf->priv);
  74 }
  75
  76 static int vf_open(vf_instance_t *vf, char *args)
  77 {
  78         vf->put_image = put_image;
  79         vf->control = control;
  80         vf->uninit = uninit;
  81         vf->priv = calloc(1, sizeof(struct vf_priv_s));
  82         return 1;
  83 }
  84
  85 const vf_info_t vf_info_harddup = {
  86     "resubmit duplicate frames for encoding",
  87     "harddup",
  88     "Rich Felker",
  89     "",
  90     vf_open,
  91     NULL
  92 };