libmpcodecs/vf_dvbscale.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
  31 struct vf_priv_s {
  32     int aspect;
  33 };
  34
  35 //===========================================================================//
  36
  37 static int config(struct vf_instance *vf,
  38         int width, int height, int d_width, int d_height,
  39         unsigned int flags, unsigned int outfmt){
  40
  41     int scaled_y=vf->priv->aspect*d_height/d_width;
  42
  43     d_width=width; // do X-scaling by hardware
  44     d_height=scaled_y;
  45
  46     return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
  47 }
  48
  49 static int vf_open(vf_instance_t *vf, char *args){
  50     vf->config=config;
  51     vf->default_caps=0;
  52     vf->priv=malloc(sizeof(struct vf_priv_s));
  53     vf->priv->aspect=768;
  54     if(args) vf->priv->aspect=atoi(args);
  55     return 1;
  56 }
  57
  58 const vf_info_t vf_info_dvbscale = {
  59     "calc Y scaling for DVB card",
  60     "dvbscale",
  61     "A'rpi",
  62     "",
  63     vf_open,
  64     NULL
  65 };
  66
  67 //===========================================================================//