libmpcodecs/vf_dint.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 #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 = 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       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     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 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 //      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 //    mp_msg (MSGT_VFILTER, MSGL_INFO, "DI:%d/%d ", vf->priv->rdfr, vf->priv->dfr);
 191     return 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 vf_info_dint = {
 208     "drop interlaced frames",
 209     "dint",
 210     "A.G.",
 211     "",
 212     vf_open,
 213     NULL
 214 };