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vf_down3dright.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 #include <inttypes.h>
23 
24 #include "config.h"
25 #include "mp_msg.h"
26 #include "cpudetect.h"
27 
28 #include "img_format.h"
29 #include "mp_image.h"
30 #include "vf.h"
31 
32 #include "libvo/fastmemcpy.h"
33 
34 struct vf_priv_s {
35  int skipline;
36  int scalew;
37  int scaleh;
38 };
39 
40 static void toright(unsigned char *dst[3], unsigned char *src[3],
41  int dststride[3], int srcstride[3],
42  int w, int h, struct vf_priv_s* p)
43 {
44  int k;
45 
46  for (k = 0; k < 3; k++) {
47  unsigned char* fromL = src[k];
48  unsigned char* fromR = src[k];
49  unsigned char* to = dst[k];
50  int src = srcstride[k];
51  int dst = dststride[k];
52  int ss;
53  unsigned int dd;
54  int i;
55 
56  if (k > 0) {
57  i = h / 4 - p->skipline / 2;
58  ss = src * (h / 4 + p->skipline / 2);
59  dd = w / 4;
60  } else {
61  i = h / 2 - p->skipline;
62  ss = src * (h / 2 + p->skipline);
63  dd = w / 2;
64  }
65  fromR += ss;
66  for ( ; i > 0; i--) {
67  int j;
68  unsigned char* t = to;
69  unsigned char* sL = fromL;
70  unsigned char* sR = fromR;
71 
72  if (p->scalew == 1) {
73  for (j = dd; j > 0; j--) {
74  *t++ = (sL[0] + sL[1]) / 2;
75  sL+=2;
76  }
77  for (j = dd ; j > 0; j--) {
78  *t++ = (sR[0] + sR[1]) / 2;
79  sR+=2;
80  }
81  } else {
82  for (j = dd * 2 ; j > 0; j--)
83  *t++ = *sL++;
84  for (j = dd * 2 ; j > 0; j--)
85  *t++ = *sR++;
86  }
87  if (p->scaleh == 1) {
88  fast_memcpy(to + dst, to, dst);
89  to += dst;
90  }
91  to += dst;
92  fromL += src;
93  fromR += src;
94  }
95  //printf("K %d %d %d %d %d \n", k, w, h, src, dst);
96  }
97 }
98 
99 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
100 {
101  mp_image_t *dmpi;
102 
103  // hope we'll get DR buffer:
104  dmpi=ff_vf_get_image(vf->next, IMGFMT_YV12,
106  ((vf->priv->scaleh == 1) ? MP_IMGFLAG_READABLE : 0),
107  mpi->w * vf->priv->scalew,
108  mpi->h / vf->priv->scaleh - vf->priv->skipline);
109 
110  toright(dmpi->planes, mpi->planes, dmpi->stride,
111  mpi->stride, mpi->w, mpi->h, vf->priv);
112 
113  return ff_vf_next_put_image(vf,dmpi, pts);
114 }
115 
116 static int config(struct vf_instance *vf,
117  int width, int height, int d_width, int d_height,
118  unsigned int flags, unsigned int outfmt)
119 {
120  /* FIXME - also support UYVY output? */
121  return ff_vf_next_config(vf, width * vf->priv->scalew,
122  height / vf->priv->scaleh - vf->priv->skipline, d_width, d_height, flags, IMGFMT_YV12);
123 }
124 
125 
126 static int query_format(struct vf_instance *vf, unsigned int fmt)
127 {
128  /* FIXME - really any YUV 4:2:0 input format should work */
129  switch (fmt) {
130  case IMGFMT_YV12:
131  case IMGFMT_IYUV:
132  case IMGFMT_I420:
134  }
135  return 0;
136 }
137 
138 static void uninit(struct vf_instance *vf)
139 {
140  free(vf->priv);
141 }
142 
143 static int vf_open(vf_instance_t *vf, char *args)
144 {
145  vf->config=config;
147  vf->put_image=put_image;
148  vf->uninit=uninit;
149 
150  vf->priv = calloc(1, sizeof (struct vf_priv_s));
151  vf->priv->skipline = 0;
152  vf->priv->scalew = 1;
153  vf->priv->scaleh = 2;
154  if (args) sscanf(args, "%d:%d:%d", &vf->priv->skipline, &vf->priv->scalew, &vf->priv->scaleh);
155 
156  return 1;
157 }
158 
160  "convert stereo movie from top-bottom to left-right field",
161  "down3dright",
162  "Zdenek Kabelac",
163  "",
164  vf_open,
165  NULL
166 };