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vf_tinterlace.c
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1 /*
2  * Copyright (C) 2003 Michael Zucchi <notzed@ximian.com>
3  *
4  * This file is part of MPlayer.
5  *
6  * MPlayer is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * MPlayer is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License along
17  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19  */
20 
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24 
25 #include "config.h"
26 #include "mp_msg.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 mode;
36  int frame;
38 };
39 
40 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
41 {
42  int ret = 0;
43  mp_image_t *dmpi;
44 
45  switch (vf->priv->mode) {
46  case 0:
47  dmpi = vf->priv->dmpi;
48  if (dmpi == NULL) {
49  dmpi = ff_vf_get_image(vf->next, mpi->imgfmt,
52  mpi->width, mpi->height*2);
53 
54  vf->priv->dmpi = dmpi;
55 
56  memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h,
57  dmpi->stride[0]*2, mpi->stride[0]);
58  if (mpi->flags & MP_IMGFLAG_PLANAR) {
59  memcpy_pic(dmpi->planes[1], mpi->planes[1],
60  mpi->chroma_width, mpi->chroma_height,
61  dmpi->stride[1]*2, mpi->stride[1]);
62  memcpy_pic(dmpi->planes[2], mpi->planes[2],
63  mpi->chroma_width, mpi->chroma_height,
64  dmpi->stride[2]*2, mpi->stride[2]);
65  }
66  } else {
67  vf->priv->dmpi = NULL;
68 
69  memcpy_pic(dmpi->planes[0]+dmpi->stride[0], mpi->planes[0], mpi->w, mpi->h,
70  dmpi->stride[0]*2, mpi->stride[0]);
71  if (mpi->flags & MP_IMGFLAG_PLANAR) {
72  memcpy_pic(dmpi->planes[1]+dmpi->stride[1], mpi->planes[1],
73  mpi->chroma_width, mpi->chroma_height,
74  dmpi->stride[1]*2, mpi->stride[1]);
75  memcpy_pic(dmpi->planes[2]+dmpi->stride[2], mpi->planes[2],
76  mpi->chroma_width, mpi->chroma_height,
77  dmpi->stride[2]*2, mpi->stride[2]);
78  }
79  ret = ff_vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
80  }
81  break;
82  case 1:
83  if (vf->priv->frame & 1)
84  ret = ff_vf_next_put_image(vf, mpi, MP_NOPTS_VALUE);
85  break;
86  case 2:
87  if ((vf->priv->frame & 1) == 0)
88  ret = ff_vf_next_put_image(vf, mpi, MP_NOPTS_VALUE);
89  break;
90  case 3:
91  dmpi = ff_vf_get_image(vf->next, mpi->imgfmt,
93  mpi->width, mpi->height*2);
94  /* fixme, just clear alternate lines */
95  ff_vf_mpi_clear(dmpi, 0, 0, dmpi->w, dmpi->h);
96  if ((vf->priv->frame & 1) == 0) {
97  memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h,
98  dmpi->stride[0]*2, mpi->stride[0]);
99  if (mpi->flags & MP_IMGFLAG_PLANAR) {
100  memcpy_pic(dmpi->planes[1], mpi->planes[1],
101  mpi->chroma_width, mpi->chroma_height,
102  dmpi->stride[1]*2, mpi->stride[1]);
103  memcpy_pic(dmpi->planes[2], mpi->planes[2],
104  mpi->chroma_width, mpi->chroma_height,
105  dmpi->stride[2]*2, mpi->stride[2]);
106  }
107  } else {
108  memcpy_pic(dmpi->planes[0]+dmpi->stride[0], mpi->planes[0], mpi->w, mpi->h,
109  dmpi->stride[0]*2, mpi->stride[0]);
110  if (mpi->flags & MP_IMGFLAG_PLANAR) {
111  memcpy_pic(dmpi->planes[1]+dmpi->stride[1], mpi->planes[1],
112  mpi->chroma_width, mpi->chroma_height,
113  dmpi->stride[1]*2, mpi->stride[1]);
114  memcpy_pic(dmpi->planes[2]+dmpi->stride[2], mpi->planes[2],
115  mpi->chroma_width, mpi->chroma_height,
116  dmpi->stride[2]*2, mpi->stride[2]);
117  }
118  }
119  ret = ff_vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
120  break;
121  case 4:
122  // Interleave even lines (only) from Frame 'i' with odd
123  // lines (only) from Frame 'i+1', halving the Frame
124  // rate and preserving image height.
125 
126  dmpi = vf->priv->dmpi;
127 
128  // @@ Need help: Should I set dmpi->fields to indicate
129  // that the (new) frame will be interlaced!? E.g. ...
130  // dmpi->fields |= MP_IMGFIELD_INTERLACED;
131  // dmpi->fields |= MP_IMGFIELD_TOP_FIRST;
132  // etc.
133 
134  if (dmpi == NULL) {
135  dmpi = ff_vf_get_image(vf->next, mpi->imgfmt,
138  mpi->width, mpi->height);
139 
140  vf->priv->dmpi = dmpi;
141 
142  my_memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h/2,
143  dmpi->stride[0]*2, mpi->stride[0]*2);
144  if (mpi->flags & MP_IMGFLAG_PLANAR) {
145  my_memcpy_pic(dmpi->planes[1], mpi->planes[1],
146  mpi->chroma_width, mpi->chroma_height/2,
147  dmpi->stride[1]*2, mpi->stride[1]*2);
148  my_memcpy_pic(dmpi->planes[2], mpi->planes[2],
149  mpi->chroma_width, mpi->chroma_height/2,
150  dmpi->stride[2]*2, mpi->stride[2]*2);
151  }
152  } else {
153  vf->priv->dmpi = NULL;
154 
155  my_memcpy_pic(dmpi->planes[0]+dmpi->stride[0],
156  mpi->planes[0]+mpi->stride[0],
157  mpi->w, mpi->h/2,
158  dmpi->stride[0]*2, mpi->stride[0]*2);
159  if (mpi->flags & MP_IMGFLAG_PLANAR) {
160  my_memcpy_pic(dmpi->planes[1]+dmpi->stride[1],
161  mpi->planes[1]+mpi->stride[1],
162  mpi->chroma_width, mpi->chroma_height/2,
163  dmpi->stride[1]*2, mpi->stride[1]*2);
164  my_memcpy_pic(dmpi->planes[2]+dmpi->stride[2],
165  mpi->planes[2]+mpi->stride[2],
166  mpi->chroma_width, mpi->chroma_height/2,
167  dmpi->stride[2]*2, mpi->stride[2]*2);
168  }
169  ret = ff_vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
170  }
171  break;
172  }
173 
174  vf->priv->frame++;
175 
176  return ret;
177 }
178 
179 static int query_format(struct vf_instance *vf, unsigned int fmt)
180 {
181  /* FIXME - figure out which other formats work */
182  switch (fmt) {
183  case IMGFMT_YV12:
184  case IMGFMT_IYUV:
185  case IMGFMT_I420:
186  return ff_vf_next_query_format(vf, fmt);
187  }
188  return 0;
189 }
190 
191 static int config(struct vf_instance *vf,
192  int width, int height, int d_width, int d_height,
193  unsigned int flags, unsigned int outfmt)
194 {
195  switch (vf->priv->mode) {
196  case 0:
197  case 3:
198  return ff_vf_next_config(vf,width,height*2,d_width,d_height*2,flags,outfmt);
199  case 1: /* odd frames */
200  case 2: /* even frames */
201  case 4: /* alternate frame (height-preserving) interlacing */
202  return ff_vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
203  }
204  return 0;
205 }
206 
207 static void uninit(struct vf_instance *vf)
208 {
209  free(vf->priv);
210 }
211 
212 static int vf_open(vf_instance_t *vf, char *args)
213 {
214  struct vf_priv_s *p;
215  vf->config = config;
216  vf->put_image = put_image;
218  vf->uninit = uninit;
220  vf->priv = p = calloc(1, sizeof(struct vf_priv_s));
221  p->mode = 0;
222  if (args)
223  sscanf(args, "%d", &p->mode);
224  p->frame = 0;
225  return 1;
226 }
227 
229  "temporal field interlacing",
230  "tinterlace",
231  "Michael Zucchi",
232  "",
233  vf_open,
234  NULL
235 };