libmpcodecs/vf_tinterlace.c

   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;
  37         mp_image_t *dmpi;
  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 = vf_get_image(vf->next, mpi->imgfmt,
  50                                             MP_IMGTYPE_STATIC, MP_IMGFLAG_ACCEPT_STRIDE |
  51                                             MP_IMGFLAG_PRESERVE,
  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 = vf_next_put_image(vf, dmpi, pts);
  80                 }
  81                 break;
  82         case 1:
  83                 if (vf->priv->frame & 1)
  84                         ret = vf_next_put_image(vf, mpi, pts);
  85                 break;
  86         case 2:
  87                 if ((vf->priv->frame & 1) == 0)
  88                         ret = vf_next_put_image(vf, mpi, pts);
  89                 break;
  90         case 3:
  91                 dmpi = vf_get_image(vf->next, mpi->imgfmt,
  92                                     MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
  93                                     mpi->width, mpi->height*2);
  94                 /* fixme, just clear alternate lines */
  95                 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 = vf_next_put_image(vf, dmpi, pts);
 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 = vf_get_image(vf->next, mpi->imgfmt,
 136                                             MP_IMGTYPE_STATIC, MP_IMGFLAG_ACCEPT_STRIDE |
 137                                             MP_IMGFLAG_PRESERVE,
 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 = vf_next_put_image(vf, dmpi, pts);
 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 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 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 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;
 217         vf->query_format = query_format;
 218         vf->uninit = uninit;
 219         vf->default_reqs = VFCAP_ACCEPT_STRIDE;
 220         vf->priv = p = calloc(1, sizeof(struct vf_priv_s));
 221         vf->priv->mode = 0;
 222         if (args)
 223           sscanf(args, "%d", &vf->priv->mode);
 224         vf->priv->frame = 0;
 225         return 1;
 226 }
 227
 228 const vf_info_t vf_info_tinterlace = {
 229         "temporal field interlacing",
 230         "tinterlace",
 231         "Michael Zucchi",
 232         "",
 233         vf_open,
 234         NULL
 235 };