[MPlayer-dev-eng] [PATCH] bmovl speedup
Arpi
arpi at thot.banki.hu
Sat Jan 25 12:46:12 CET 2003
Hi,
seems ok, apply it!
> This is a simple patch to change the alpha blending code in bmovl to use
> integers instead of floating point. It speeds it up by about 400%
> meaning that it's now possible to apply alpha blending to a whole
> 1024x768 image on my 1266MHz PIII.
>
> --
> Jonas Jensen <jbj at knef.dk>
>
>
> --- MPlayer-20030125/libmpcodecs/vf_bmovl.c 2003-01-10 22:44:28.000000000 +0100
> +++ MPlayer-bmovl-speedup/libmpcodecs/vf_bmovl.c 2003-01-25 1
> 2:25:18.000000000 +0100
> @@ -395,11 +395,20 @@
> dmpi->planes[2][pos] = vf->priv->bitmap.v[pos];
> }
> } else { // Alphablended pixel
> - dmpi->planes[0][pos] = (dmpi->planes[0][pos]*(1.0-(alpha/255.0))) +
> (vf->priv->bitmap.y[pos]*(alpha/255.0));
> + dmpi->planes[0][pos] =
> + ((255 - alpha) * (int)dmpi->planes[0][pos] +
> + alpha * (int)vf->priv->bitmap.y[pos]) >> 8;
> +
> if ((ypos%2) && (xpos%2)) {
> pos = ( (ypos/2) * dmpi->stride[1] ) + (xpos/2);
> - dmpi->planes[1][pos] = (dmpi->planes[1][pos]*(1.0-(alpha/255.0))) +
> (vf->priv->bitmap.u[pos]*(alpha/255.0));
> - dmpi->planes[2][pos] = (dmpi->planes[2][pos]*(1.0-(alpha/255.0))) +
> (vf->priv->bitmap.v[pos]*(alpha/255.0));
> +
> + dmpi->planes[1][pos] =
> + ((255 - alpha) * (int)dmpi->planes[1][pos] +
> + alpha * (int)vf->priv->bitmap.u[pos]) >> 8;
> +
> + dmpi->planes[2][pos] =
> + ((255 - alpha) * (int)dmpi->planes[2][pos] +
> + alpha * (int)vf->priv->bitmap.v[pos]) >> 8;
> }
> }
> } // for xpos
>
>
> _______________________________________________
> MPlayer-dev-eng mailing list
> MPlayer-dev-eng at mplayerhq.hu
> http://mplayerhq.hu/mailman/listinfo/mplayer-dev-eng
>
>
A'rpi / Astral & ESP-team
--
Developer of MPlayer, the Movie Player for Linux - http://www.MPlayerHQ.hu
More information about the MPlayer-dev-eng
mailing list