libmpcodecs/vf_softskip.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         int skipflag;
  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         if (vf->priv->skipflag)
  39                 return vf->priv->skipflag = 0;
  40
  41         dmpi = vf_get_image(vf->next, mpi->imgfmt,
  42                 MP_IMGTYPE_EXPORT, 0, mpi->width, mpi->height);
  43         vf_clone_mpi_attributes(dmpi, mpi);
  44
  45         dmpi->planes[0] = mpi->planes[0];
  46         dmpi->stride[0] = mpi->stride[0];
  47         if (dmpi->flags&MP_IMGFLAG_PLANAR) {
  48                 dmpi->planes[1] = mpi->planes[1];
  49                 dmpi->stride[1] = mpi->stride[1];
  50                 dmpi->planes[2] = mpi->planes[2];
  51                 dmpi->stride[2] = mpi->stride[2];
  52         }
  53
  54         return vf_next_put_image(vf, dmpi, pts);
  55 }
  56
  57 static int control(struct vf_instance *vf, int request, void* data)
  58 {
  59         switch (request) {
  60         case VFCTRL_SKIP_NEXT_FRAME:
  61                 vf->priv->skipflag = 1;
  62                 return CONTROL_TRUE;
  63         }
  64         return vf_next_control(vf, request, data);
  65 }
  66
  67 #if 0
  68 static int query_format(struct vf_instance *vf, unsigned int fmt)
  69 {
  70         /* FIXME - figure out which other formats work */
  71         switch (fmt) {
  72         case IMGFMT_YV12:
  73         case IMGFMT_IYUV:
  74         case IMGFMT_I420:
  75                 return vf_next_query_format(vf, fmt);
  76         }
  77         return 0;
  78 }
  79 #endif
  80
  81 static void uninit(struct vf_instance *vf)
  82 {
  83         free(vf->priv);
  84 }
  85
  86 static int vf_open(vf_instance_t *vf, char *args)
  87 {
  88         vf->put_image = put_image;
  89         vf->control = control;
  90         vf->uninit = uninit;
  91         vf->priv = calloc(1, sizeof(struct vf_priv_s));
  92         return 1;
  93 }
  94
  95 const vf_info_t vf_info_softskip = {
  96     "soft (post-filter) frame skipping for encoding",
  97     "softskip",
  98     "Rich Felker",
  99     "",
 100     vf_open,
 101     NULL
 102 };