libmpcodecs/vf_dsize.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <inttypes.h>
   5
   6 #include "../config.h"
   7 #include "../mp_msg.h"
   8
   9 #include "img_format.h"
  10 #include "mp_image.h"
  11 #include "vf.h"
  12
  13 struct vf_priv_s {
  14         int w, h;
  15         float aspect;
  16 };
  17
  18 static int config(struct vf_instance_s* vf,
  19         int width, int height, int d_width, int d_height,
  20         unsigned int flags, unsigned int outfmt)
  21 {
  22         if (vf->priv->w && vf->priv->h) {
  23                 d_width = vf->priv->w;
  24                 d_height = vf->priv->h;
  25         } else {
  26                 if (vf->priv->aspect * height > width) {
  27                         d_width = height * vf->priv->aspect;
  28                         d_height = height;
  29                 } else {
  30                         d_height = width / vf->priv->aspect;
  31                         d_width = width;
  32                 }
  33         }
  34         return vf_next_config(vf, width, height, d_width, d_height, flags, outfmt);
  35 }
  36
  37 static int open(vf_instance_t *vf, char* args)
  38 {
  39         vf->config = config;
  40         vf->draw_slice = vf_next_draw_slice;
  41         //vf->default_caps = 0;
  42         vf->priv = calloc(sizeof(struct vf_priv_s), 1);
  43         vf->priv->aspect = 4.0/3.0;
  44         if (args) {
  45                 if (strchr(args, '/')) {
  46                         int w, h;
  47                         sscanf(args, "%d/%d", &w, &h);
  48                         vf->priv->aspect = (float)w/h;
  49                 } else if (strchr(args, '.')) {
  50                         sscanf(args, "%f", &vf->priv->aspect);
  51                 } else {
  52                         sscanf(args, "%d:%d", &vf->priv->w, &vf->priv->h);
  53                 }
  54         }
  55         return 1;
  56 }
  57
  58 vf_info_t vf_info_dsize = {
  59     "reset displaysize/aspect",
  60     "dsize",
  61     "Rich Felker",
  62     "",
  63     open,
  64     NULL
  65 };
  66