libmpcodecs/vf_lavcdeint.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 "img_format.h"
  28 #include "mp_image.h"
  29 #include "vf.h"
  30 #include "vd_ffmpeg.h"
  31 #include "libavcodec/avcodec.h"
  32
  33
  34 struct vf_priv_s
  35 {
  36   int       width, height;
  37   int       pix_fmt;
  38 };
  39
  40 /* Support for avcodec's built-in deinterlacer.
  41  * Based on vf_lavc.c
  42  */
  43
  44 //===========================================================================//
  45
  46
  47 /* Convert mplayer's IMGFMT_* to avcodec's PIX_FMT_* for the supported
  48  * IMGFMT's, and return -1 if the deinterlacer doesn't support
  49  * that format (-1 because 0 is a valid PIX_FMT).
  50  */
  51 /* The deinterlacer supports planer 4:2:0, 4:2:2, and 4:4:4 YUV */
  52 static int
  53 imgfmt_to_pixfmt (int imgfmt)
  54 {
  55   switch(imgfmt)
  56     {
  57       /* I hope I got all the supported formats */
  58
  59       /* 4:2:0 */
  60     case IMGFMT_YV12:
  61     case IMGFMT_I420:
  62     case IMGFMT_IYUV:
  63       return PIX_FMT_YUV420P;
  64       break;
  65
  66 #if 0
  67       /* 4:2:2 */
  68     case IMGFMT_UYVY:
  69     case IMGFMT_UYNV:
  70     case IMGFMT_Y422:
  71     case IMGFMT_YUY2:
  72     case IMGFMT_YUNV:
  73     case IMGFMT_YVYU:
  74     case IMGFMT_Y42T:
  75     case IMGFMT_V422:
  76     case IMGFMT_V655:
  77       return PIX_FMT_YUV422P;
  78       break;
  79 #endif
  80
  81       /* Are there any _planar_ YUV 4:4:4 formats? */
  82
  83     default:
  84       return -1;
  85     }
  86 }
  87
  88
  89 static int
  90 config (struct vf_instance *vf,
  91         int width, int height, int d_width, int d_height,
  92         unsigned int flags, unsigned int outfmt)
  93 {
  94   struct vf_priv_s *priv = vf->priv;
  95
  96   priv->pix_fmt = imgfmt_to_pixfmt(outfmt);
  97   if(priv->pix_fmt == -1)
  98     return 0;
  99
 100   /* The deinterlacer will fail if this is false */
 101   if ((width & 3) != 0 || (height & 3) != 0)
 102     return 0;
 103
 104   /* If we get here, the deinterlacer is guaranteed not to fail */
 105
 106   priv->width  = width;
 107   priv->height = height;
 108
 109   return vf_next_config(vf,
 110                         width, height,
 111                         d_width, d_height,
 112                         flags, outfmt);
 113 }
 114
 115 static int
 116 put_image (struct vf_instance *vf, mp_image_t *mpi, double pts)
 117 {
 118   struct vf_priv_s *priv = vf->priv;
 119   mp_image_t* dmpi;
 120   AVPicture pic;
 121   AVPicture lavc_picture;
 122
 123   lavc_picture.data[0]     = mpi->planes[0];
 124   lavc_picture.data[1]     = mpi->planes[1];
 125   lavc_picture.data[2]     = mpi->planes[2];
 126   lavc_picture.linesize[0] = mpi->stride[0];
 127   lavc_picture.linesize[1] = mpi->stride[1];
 128   lavc_picture.linesize[2] = mpi->stride[2];
 129
 130   dmpi = vf_get_image(vf->next, mpi->imgfmt,
 131                       MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
 132                       priv->width, priv->height);
 133
 134   pic.data[0]     = dmpi->planes[0];
 135   pic.data[1]     = dmpi->planes[1];
 136   pic.data[2]     = dmpi->planes[2];
 137   pic.linesize[0] = dmpi->stride[0];
 138   pic.linesize[1] = dmpi->stride[1];
 139   pic.linesize[2] = dmpi->stride[2];
 140
 141   if (avpicture_deinterlace(&pic, &lavc_picture,
 142                             priv->pix_fmt, priv->width, priv->height) < 0)
 143     {
 144       /* This should not happen -- see config() */
 145       return 0;
 146     }
 147
 148   return vf_next_put_image(vf, dmpi, pts);
 149 }
 150
 151
 152 static int
 153 query_format (struct vf_instance *vf, unsigned int fmt)
 154 {
 155   if(imgfmt_to_pixfmt(fmt) == -1)
 156     return 0;
 157
 158   return vf_next_query_format(vf,fmt);
 159 }
 160
 161
 162 static int
 163 vf_open(vf_instance_t *vf, char *args)
 164 {
 165   /* We don't have any args */
 166   (void) args;
 167
 168   vf->config       = config;
 169   vf->put_image    = put_image;
 170   vf->query_format = query_format;
 171   vf->priv         = malloc(sizeof(struct vf_priv_s));
 172   memset(vf->priv,0,sizeof(struct vf_priv_s));
 173
 174   /* This may not technically be necessary just for a deinterlace,
 175    * but it seems like a good idea.
 176    */
 177   init_avcodec();
 178
 179   return 1;
 180 }
 181
 182
 183 const vf_info_t vf_info_lavcdeint = {
 184     "libavcodec's deinterlacing filter",
 185     "lavcdeint",
 186     "Joe Rabinoff",
 187     "libavcodec's internal deinterlacer, in case you don't like "
 188       "the builtin ones (invoked with -pp or -npp)",
 189     vf_open,
 190     NULL
 191 };
 192
 193
 194 //===========================================================================//