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fix for negative values for width and height (aspect-preserving scaling).

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@13926 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
reimar 2004-11-12 11:15:26 +00:00
parent 5dc5623cf2
commit e006508ab8
1 changed files with 33 additions and 27 deletions
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60
libmpcodecs/vf_scale.c
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@ -141,40 +141,46 @@ static int config(struct vf_instance_s* vf,
}
}
if (vf->priv->w < -3 || vf->priv->h < -3 ||
(vf->priv->w < -1 && vf->priv->h < -1)) {
// TODO: establish a direct connection to the user's brain
// and find out what the heck he thinks MPlayer should do
// with this nonsense.
mp_msg(MSGT_VFILTER, MSGL_ERR, "SwScale: EUSERBROKEN Check your parameters, they make no sense!\n");
return 0;
}
if (vf->priv->w == -1)
vf->priv->w = width;
if (vf->priv->w == 0)
vf->priv->w = d_width;
if (vf->priv->h == -1)
vf->priv->h = height;
if (vf->priv->h == 0)
vf->priv->h = d_height;
if (vf->priv->w == -3)
vf->priv->w = vf->priv->h * width / height;
if (vf->priv->w == -2)
vf->priv->w = vf->priv->h * d_width / d_height;
if (vf->priv->h == -3)
vf->priv->h = vf->priv->w * height / width;
if (vf->priv->h == -2)
vf->priv->h = vf->priv->w * d_height / d_width;
// calculate the missing parameters:
switch(best) {
case IMGFMT_YUY2: /* YUY2 needs w rounded to 2 */
case IMGFMT_UYVY:
if(vf->priv->w==-3) vf->priv->w=(vf->priv->h*width/height+1)&~1; else
if(vf->priv->w==-2) vf->priv->w=(vf->priv->h*d_width/d_height+1)&~1;
if(vf->priv->w<0) vf->priv->w=width; else
if(vf->priv->w==0) vf->priv->w=d_width;
if(vf->priv->h==-3) vf->priv->h=vf->priv->w*height/width; else
if(vf->priv->h==-2) vf->priv->h=vf->priv->w*d_height/d_width;
break;
case IMGFMT_YV12: /* YV12 needs w & h rounded to 2 */
case IMGFMT_I420:
case IMGFMT_IYUV:
if(vf->priv->w==-3) vf->priv->w=(vf->priv->h*width/height+1)&~1; else
if(vf->priv->w==-2) vf->priv->w=(vf->priv->h*d_width/d_height+1)&~1;
if(vf->priv->w<0) vf->priv->w=width; else
if(vf->priv->w==0) vf->priv->w=d_width;
if(vf->priv->h==-3) vf->priv->h=(vf->priv->w*height/width+1)&~1; else
if(vf->priv->h==-2) vf->priv->h=(vf->priv->w*d_height/d_width+1)&~1;
break;
default:
if(vf->priv->w==-3) vf->priv->w=vf->priv->h*width/height; else
if(vf->priv->w==-2) vf->priv->w=vf->priv->h*d_width/d_height;
if(vf->priv->w<0) vf->priv->w=width; else
if(vf->priv->w==0) vf->priv->w=d_width;
if(vf->priv->h==-3) vf->priv->h=vf->priv->w*height/width; else
if(vf->priv->h==-2) vf->priv->h=vf->priv->w*d_height/d_width;
break;
vf->priv->h = (vf->priv->h + 1) & ~1;
case IMGFMT_YUY2: /* YUY2 needs w rounded to 2 */
case IMGFMT_UYVY:
vf->priv->w = (vf->priv->w + 1) & ~1;
}
if(vf->priv->h<0) vf->priv->h=height; else
if(vf->priv->h==0) vf->priv->h=d_height;
mp_msg(MSGT_VFILTER,MSGL_DBG2,"SwScale: scaling %dx%d %s to %dx%d %s \n",
width,height,vo_format_name(outfmt),
vf->priv->w,vf->priv->h,vo_format_name(best));