FFmpeg: libavfilter/libmpcodecs/vf_dint.c Source File

FFmpeg
vf_dint.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 
27 #include "mp_image.h"
28 #include "img_format.h"
29 #include "vf.h"
30 
31  struct vf_priv_s {
32   float sense; // first parameter
33   float level; // second parameter
34   unsigned int imgfmt;
35   int diff;
36   uint32_t max;
37 // int dfr;
38 // int rdfr;
39   int was_dint;
40   mp_image_t *pmpi; // previous mpi
41 };
42 
43  #define MAXROWSIZE 1200
44 
45  static int config (struct vf_instance *vf,
46  int width, int height, int d_width, int d_height,
47  unsigned int flags, unsigned int outfmt)
48 {
49  int rowsize;
50 
51  vf->priv->pmpi = ff_vf_get_image (vf->next, outfmt, MP_IMGTYPE_TEMP,
52  0, width, height);
53  if (!(vf->priv->pmpi->flags & MP_IMGFLAG_PLANAR) &&
54  outfmt != IMGFMT_RGB32 && outfmt != IMGFMT_BGR32 &&
55  outfmt != IMGFMT_RGB24 && outfmt != IMGFMT_BGR24 &&
56  outfmt != IMGFMT_RGB16 && outfmt != IMGFMT_BGR16)
57  {
58  ff_mp_msg (MSGT_VFILTER, MSGL_WARN, "Drop-interlaced filter doesn't support this outfmt :(\n");
59  return 0;
60  }
61  vf->priv->imgfmt = outfmt;
62  // recalculate internal values
63  rowsize = vf->priv->pmpi->width;
64  if (rowsize > MAXROWSIZE) rowsize = MAXROWSIZE;
65  vf->priv->max = vf->priv->level * vf->priv->pmpi->height * rowsize / 2;
66  if (vf->priv->pmpi->flags & MP_IMGFLAG_PLANAR) // planar YUV
67  vf->priv->diff = vf->priv->sense * 256;
68  else
69  vf->priv->diff = vf->priv->sense * (1 << (vf->priv->pmpi->bpp/3));
70  if (vf->priv->diff < 0) vf->priv->diff = 0;
71  if (!(vf->priv->pmpi->flags & MP_IMGFLAG_PLANAR) &&
72  vf->priv->pmpi->bpp < 24 && vf->priv->diff > 31)
73  vf->priv->diff = 31;
74  ff_mp_msg (MSGT_VFILTER, MSGL_INFO, "Drop-interlaced: %dx%d diff %d / level %u\n",
75  vf->priv->pmpi->width, vf->priv->pmpi->height,
76  vf->priv->diff, (unsigned int)vf->priv->max);
77 // vf->priv->rdfr = vf->priv->dfr = 0;
78  vf->priv->was_dint = 0;
79  return ff_vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
80 }
81 
82  static int put_image (struct vf_instance *vf, mp_image_t *mpi, double pts)
83 {
84  int8_t rrow0[MAXROWSIZE];
85  int8_t rrow1[MAXROWSIZE];
86  int8_t rrow2[MAXROWSIZE];
87  int8_t *row0 = rrow0, *row1 = rrow1, *row2 = rrow2/*, *row3 = rrow3*/;
88  int rowsize = mpi->width;
89  uint32_t nok = 0, max = vf->priv->max;
90  int diff = vf->priv->diff;
91  int i, j;
92  register int n1, n2;
93  unsigned char *cur0, *prv0;
94  register unsigned char *cur, *prv;
95 
96  if (rowsize > MAXROWSIZE) rowsize = MAXROWSIZE;
97  // check if nothing to do
98  if (mpi->imgfmt == vf->priv->imgfmt)
99  {
100  cur0 = mpi->planes[0] + mpi->stride[0];
101  prv0 = mpi->planes[0];
102  for (j = 1; j < mpi->height && nok <= max; j++)
103  {
104  cur = cur0;
105  prv = prv0;
106  // analyse row (row0)
107  if (mpi->flags & MP_IMGFLAG_PLANAR) // planar YUV - check luminance
108  for (i = 0; i < rowsize; i++)
109  {
110  if (cur[0] - prv[0] > diff)
111  row0[i] = 1;
112  else if (cur[0] - prv[0] < -diff)
113  row0[i] = -1;
114  else
115  row0[i] = 0;
116  cur++;
117  prv++;
118  // check if row0 is 1 but row1 is 0, and row2 is 1 or row2 is 0
119  // but row3 is 1 so it's interlaced ptr (nok++)
120  if (j > 2 && row0[i] > 0 && (row1[i] < 0 || (!row1[i] && row2[i] < 0)) &&
121  (++nok) > max)
122  break;
123  }
124  else if (mpi->bpp < 24) // RGB/BGR 16 - check all colors
125  for (i = 0; i < rowsize; i++)
126  {
127  n1 = cur[0] + (cur[1]<<8);
128  n2 = prv[0] + (prv[1]<<8);
129  if ((n1&0x1f) - (n2&0x1f) > diff ||
130  ((n1>>5)&0x3f) - ((n2>>5)&0x3f) > diff ||
131  ((n1>>11)&0x1f) - ((n2>>11)&0x1f) > diff)
132  row0[i] = 1;
133  else if ((n1&0x1f) - (n2&0x1f) < -diff ||
134  ((n1>>5)&0x3f) - ((n2>>5)&0x3f) < -diff ||
135  ((n1>>11)&0x1f) - ((n2>>11)&0x1f) < -diff)
136  row0[i] = -1;
137  else
138  row0[i] = 0;
139  cur += 2;
140  prv += 2;
141  // check if row0 is 1 but row1 is 0, and row2 is 1 or row2 is 0
142  // but row3 is 1 so it's interlaced ptr (nok++)
143  if (j > 2 && row0[i] > 0 && (row1[i] < 0 || (!row1[i] && row2[i] < 0)) &&
144  (++nok) > max)
145  break;
146  }
147  else // RGB/BGR 24/32
148  for (i = 0; i < rowsize; i++)
149  {
150  if (cur[0] - prv[0] > diff ||
151  cur[1] - prv[1] > diff ||
152  cur[2] - prv[2] > diff)
153  row0[i] = 1;
154  else if (prv[0] - cur[0] > diff ||
155  prv[1] - cur[1] > diff ||
156  prv[2] - cur[2] > diff)
157  row0[i] = -1;
158  else
159  row0[i] = 0;
160  cur += mpi->bpp/8;
161  prv += mpi->bpp/8;
162  // check if row0 is 1 but row1 is 0, and row2 is 1 or row2 is 0
163  // but row3 is 1 so it's interlaced ptr (nok++)
164  if (j > 2 && row0[i] > 0 && (row1[i] < 0 || (!row1[i] && row2[i] < 0)) &&
165  (++nok) > max)
166  break;
167  }
168  cur0 += mpi->stride[0];
169  prv0 += mpi->stride[0];
170  // rotate rows
171  cur = row2;
172  row2 = row1;
173  row1 = row0;
174  row0 = cur;
175  }
176  }
177  // check if number of interlaced is above of max
178  if (nok > max)
179  {
180 // vf->priv->dfr++;
181  if (vf->priv->was_dint < 1) // can skip at most one frame!
182  {
183  vf->priv->was_dint++;
184 // vf->priv->rdfr++;
185 // ff_mp_msg (MSGT_VFILTER, MSGL_INFO, "DI:%d/%d ", vf->priv->rdfr, vf->priv->dfr);
186  return 0;
187  }
188  }
189  vf->priv->was_dint = 0;
190 // ff_mp_msg (MSGT_VFILTER, MSGL_INFO, "DI:%d/%d ", vf->priv->rdfr, vf->priv->dfr);
191  return ff_vf_next_put_image (vf, mpi, pts);
192 }
193 
194  static int vf_open(vf_instance_t *vf, char *args){
195  vf->config = config;
196  vf->put_image = put_image;
197 // vf->default_reqs=VFCAP_ACCEPT_STRIDE;
198  vf->priv = malloc (sizeof(struct vf_priv_s));
199  vf->priv->sense = 0.1;
200  vf->priv->level = 0.15;
201  vf->priv->pmpi = NULL;
202  if (args)
203  sscanf (args, "%f:%f", &vf->priv->sense, &vf->priv->level);
204  return 1;
205 }
206 
207  const vf_info_t ff_vf_info_dint = {
208  "drop interlaced frames",
209  "dint",
210  "A.G.",
211  "",
212  vf_open,
213  NULL
214 };
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