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vf_harddup.c
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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 {
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 = ff_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 ff_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) {
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 ff_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 
86  "resubmit duplicate frames for encoding",
87  "harddup",
88  "Rich Felker",
89  "",
90  vf_open,
91  NULL
92 };