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bilinear interpolation

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@20276 b3059339-0415-0410-9bf9-f77b7e298cf2
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michael 2006-10-16 20:21:31 +00:00
parent 28ecbe3cc3
commit 84aad40d58
1 changed files with 20 additions and 13 deletions
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33
libmpcodecs/vf_geq.c
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@ -87,27 +87,34 @@ static void get_image(struct vf_instance_s* vf, mp_image_t *mpi){
mpi->flags|=MP_IMGFLAG_DIRECT;
}
//FIXME spatial interpolate
static double inline getpix(struct vf_instance_s* vf, double x, double y, int plane){
int xi, yi;
mp_image_t *mpi= vf->priv->mpi;
int stride= mpi->stride[plane];
uint8_t *src= mpi->planes[plane];
xi=x= FFMIN(FFMAX(x, 0), (mpi->w >> (plane ? mpi->chroma_x_shift : 0))-1);
yi=y= FFMIN(FFMAX(y, 0), (mpi->h >> (plane ? mpi->chroma_y_shift : 0))-1);
x-=xi;
y-=yi;
return
(1-y)*((1-x)*src[xi + yi * stride] + x*src[xi + 1 + yi * stride])
+ y *((1-x)*src[xi + (yi+1) * stride] + x*src[xi + 1 + (yi+1) * stride]);
}
//FIXME cubic interpolate
//FIXME keep the last few frames
static double lum(struct vf_instance_s* vf, double x, double y){
mp_image_t *mpi= vf->priv->mpi;
x= clip(x, 0, vf->priv->mpi->w-1);
y= clip(y, 0, vf->priv->mpi->h-1);
return mpi->planes[0][(int)x + (int)y * mpi->stride[0]];
return getpix(vf, x, y, 0);
}
static double cb(struct vf_instance_s* vf, double x, double y){
mp_image_t *mpi= vf->priv->mpi;
x= clip(x, 0, (vf->priv->mpi->w >> mpi->chroma_x_shift)-1);
y= clip(y, 0, (vf->priv->mpi->h >> mpi->chroma_y_shift)-1);
return mpi->planes[1][(int)x + (int)y * mpi->stride[1]];
return getpix(vf, x, y, 1);
}
static double cr(struct vf_instance_s* vf, double x, double y){
mp_image_t *mpi= vf->priv->mpi;
x= clip(x, 0, (vf->priv->mpi->w >> mpi->chroma_x_shift)-1);
y= clip(y, 0, (vf->priv->mpi->h >> mpi->chroma_y_shift)-1);
return mpi->planes[2][(int)x + (int)y * mpi->stride[2]];
return getpix(vf, x, y, 2);
}
static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts){