| /* |
| * This file is part of MPlayer. |
| * |
| * MPlayer is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * MPlayer is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with MPlayer; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "config.h" |
| #include "mp_msg.h" |
| |
| #include "mp_image.h" |
| #include "vf.h" |
| |
| struct vf_priv_s { |
| int field; |
| }; |
| |
| //===========================================================================// |
| |
| static int config(struct vf_instance *vf, |
| int width, int height, int d_width, int d_height, |
| unsigned int flags, unsigned int outfmt){ |
| return vf_next_config(vf,width,height/2,d_width,d_height,flags,outfmt); |
| } |
| |
| static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){ |
| vf->dmpi=vf_get_image(vf->next,mpi->imgfmt, |
| MP_IMGTYPE_EXPORT, MP_IMGFLAG_ACCEPT_STRIDE, |
| mpi->width, mpi->height/2); |
| |
| // set up mpi as a double-stride image of dmpi: |
| vf->dmpi->planes[0]=mpi->planes[0]+mpi->stride[0]*vf->priv->field; |
| vf->dmpi->stride[0]=2*mpi->stride[0]; |
| if(vf->dmpi->flags&MP_IMGFLAG_PLANAR){ |
| vf->dmpi->planes[1]=mpi->planes[1]+ |
| mpi->stride[1]*vf->priv->field; |
| vf->dmpi->stride[1]=2*mpi->stride[1]; |
| vf->dmpi->planes[2]=mpi->planes[2]+ |
| mpi->stride[2]*vf->priv->field; |
| vf->dmpi->stride[2]=2*mpi->stride[2]; |
| } else |
| vf->dmpi->planes[1]=mpi->planes[1]; // passthru bgr8 palette!!! |
| |
| return vf_next_put_image(vf,vf->dmpi, pts); |
| } |
| |
| //===========================================================================// |
| |
| static void uninit(struct vf_instance *vf) |
| { |
| free(vf->priv); |
| } |
| |
| static int vf_open(vf_instance_t *vf, char *args){ |
| vf->config=config; |
| vf->put_image=put_image; |
| vf->uninit=uninit; |
| vf->default_reqs=VFCAP_ACCEPT_STRIDE; |
| vf->priv=calloc(1, sizeof(struct vf_priv_s)); |
| if (args) sscanf(args, "%d", &vf->priv->field); |
| vf->priv->field &= 1; |
| return 1; |
| } |
| |
| const vf_info_t vf_info_field = { |
| "extract single field", |
| "field", |
| "Rich Felker", |
| "", |
| vf_open, |
| NULL |
| }; |
| |
| //===========================================================================// |