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 #include "help_mp.h"
  27
  28 #include "img_format.h"
  29 #include "mp_image.h"
  30 #include "vf.h"
  31 #include "libavcodec/avcodec.h"
  32
  33 extern int avcodec_initialized;
  34
  35 struct vf_priv_s
  36 {
  37   int       width, height;
  38   int       pix_fmt;
  39 };
  40
  41 /* Support for avcodec's built-in deinterlacer.
  42  * Based on vf_lavc.c
  43  */
  44
  45 //===========================================================================//
  46
  47
  48 /* Convert mplayer's IMGFMT_* to avcodec's PIX_FMT_* for the supported
  49  * IMGFMT's, and return -1 if the deinterlacer doesn't support
  50  * that format (-1 because 0 is a valid PIX_FMT).
  51  */
  52 /* The deinterlacer supports planer 4:2:0, 4:2:2, and 4:4:4 YUV */
  53 static int
  54 imgfmt_to_pixfmt (int imgfmt)
  55 {
  56   switch(imgfmt)
  57     {
  58       /* I hope I got all the supported formats */
  59
  60       /* 4:2:0 */
  61     case IMGFMT_YV12:
  62     case IMGFMT_I420:
  63     case IMGFMT_IYUV:
  64       return PIX_FMT_YUV420P;
  65       break;
  66
  67 #if 0
  68       /* 4:2:2 */
  69     case IMGFMT_UYVY:
  70     case IMGFMT_UYNV:
  71     case IMGFMT_Y422:
  72     case IMGFMT_YUY2:
  73     case IMGFMT_YUNV:
  74     case IMGFMT_YVYU:
  75     case IMGFMT_Y42T:
  76     case IMGFMT_V422:
  77     case IMGFMT_V655:
  78       return PIX_FMT_YUV422P;
  79       break;
  80 #endif
  81
  82       /* Are there any _planar_ YUV 4:4:4 formats? */
  83
  84     default:
  85       return -1;
  86     }
  87 }
  88
  89
  90 static int
  91 config (struct vf_instance *vf,
  92         int width, int height, int d_width, int d_height,
  93         unsigned int flags, unsigned int outfmt)
  94 {
  95   struct vf_priv_s *priv = vf->priv;
  96
  97   priv->pix_fmt = imgfmt_to_pixfmt(outfmt);
  98   if(priv->pix_fmt == -1)
  99     return 0;
 100
 101   /* The deinterlacer will fail if this is false */
 102   if ((width & 3) != 0 || (height & 3) != 0)
 103     return 0;
 104
 105   /* If we get here, the deinterlacer is guaranteed not to fail */
 106
 107   priv->width  = width;
 108   priv->height = height;
 109
 110   return vf_next_config(vf,
 111                         width, height,
 112                         d_width, d_height,
 113                         flags, outfmt);
 114 }
 115
 116 static int
 117 put_image (struct vf_instance *vf, mp_image_t *mpi, double pts)
 118 {
 119   struct vf_priv_s *priv = vf->priv;
 120   mp_image_t* dmpi;
 121   AVPicture pic;
 122   AVPicture lavc_picture;
 123
 124   lavc_picture.data[0]     = mpi->planes[0];
 125   lavc_picture.data[1]     = mpi->planes[1];
 126   lavc_picture.data[2]     = mpi->planes[2];
 127   lavc_picture.linesize[0] = mpi->stride[0];
 128   lavc_picture.linesize[1] = mpi->stride[1];
 129   lavc_picture.linesize[2] = mpi->stride[2];
 130
 131   dmpi = vf_get_image(vf->next, mpi->imgfmt,
 132                       MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
 133                       priv->width, priv->height);
 134
 135   pic.data[0]     = dmpi->planes[0];
 136   pic.data[1]     = dmpi->planes[1];
 137   pic.data[2]     = dmpi->planes[2];
 138   pic.linesize[0] = dmpi->stride[0];
 139   pic.linesize[1] = dmpi->stride[1];
 140   pic.linesize[2] = dmpi->stride[2];
 141
 142   if (avpicture_deinterlace(&pic, &lavc_picture,
 143                             priv->pix_fmt, priv->width, priv->height) < 0)
 144     {
 145       /* This should not happen -- see config() */
 146       return 0;
 147     }
 148
 149   return vf_next_put_image(vf, dmpi, pts);
 150 }
 151
 152
 153 static int
 154 query_format (struct vf_instance *vf, unsigned int fmt)
 155 {
 156   if(imgfmt_to_pixfmt(fmt) == -1)
 157     return 0;
 158
 159   return vf_next_query_format(vf,fmt);
 160 }
 161
 162
 163 static int
 164 vf_open(vf_instance_t *vf, char *args)
 165 {
 166   /* We don't have any args */
 167   (void) args;
 168
 169   vf->config       = config;
 170   vf->put_image    = put_image;
 171   vf->query_format = query_format;
 172   vf->priv         = malloc(sizeof(struct vf_priv_s));
 173   memset(vf->priv,0,sizeof(struct vf_priv_s));
 174
 175   /* This may not technically be necessary just for a deinterlace,
 176    * but it seems like a good idea.
 177    */
 178   if(!avcodec_initialized)
 179     {
 180       avcodec_init();
 181       avcodec_register_all();
 182       avcodec_initialized=1;
 183     }
 184
 185   return 1;
 186 }
 187
 188
 189 const vf_info_t vf_info_lavcdeint = {
 190     "libavcodec's deinterlacing filter",
 191     "lavcdeint",
 192     "Joe Rabinoff",
 193     "libavcodec's internal deinterlacer, in case you don't like "
 194       "the builtin ones (invoked with -pp or -npp)",
 195     vf_open,
 196     NULL
 197 };
 198
 199
 200 //===========================================================================//