2 * This file is part of MPlayer.
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.
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.
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.
33 //===========================================================================//
35 static int config(struct vf_instance *vf,
36 int width, int height, int d_width, int d_height,
37 unsigned int flags, unsigned int outfmt){
38 return vf_next_config(vf,width,height/2,d_width,d_height,flags,outfmt);
41 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
42 vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
43 MP_IMGTYPE_EXPORT, MP_IMGFLAG_ACCEPT_STRIDE,
44 mpi->width, mpi->height/2);
46 // set up mpi as a double-stride image of dmpi:
47 vf->dmpi->planes[0]=mpi->planes[0]+mpi->stride[0]*vf->priv->field;
48 vf->dmpi->stride[0]=2*mpi->stride[0];
49 if(vf->dmpi->flags&MP_IMGFLAG_PLANAR){
50 vf->dmpi->planes[1]=mpi->planes[1]+
51 mpi->stride[1]*vf->priv->field;
52 vf->dmpi->stride[1]=2*mpi->stride[1];
53 vf->dmpi->planes[2]=mpi->planes[2]+
54 mpi->stride[2]*vf->priv->field;
55 vf->dmpi->stride[2]=2*mpi->stride[2];
57 vf->dmpi->planes[1]=mpi->planes[1]; // passthru bgr8 palette!!!
59 return vf_next_put_image(vf,vf->dmpi, pts);
62 //===========================================================================//
64 static void uninit(struct vf_instance *vf)
69 static int vf_open(vf_instance_t *vf, char *args){
71 vf->put_image=put_image;
73 vf->default_reqs=VFCAP_ACCEPT_STRIDE;
74 vf->priv=calloc(1, sizeof(struct vf_priv_s));
75 if (args) sscanf(args, "%d", &vf->priv->field);
80 const vf_info_t vf_info_field = {
81 "extract single field",
89 //===========================================================================//