From c9319f2ea4043859595114dca951058c8d46cb50 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 11 Oct 2003 09:11:15 +0000 Subject: forgot to commit, i hope its correct Originally committed as revision 2357 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/4xm.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'libavcodec') diff --git a/libavcodec/4xm.c b/libavcodec/4xm.c index 682143340c..03e4a175c9 100644 --- a/libavcodec/4xm.c +++ b/libavcodec/4xm.c @@ -426,6 +426,11 @@ static inline void idct_put(FourXContext *f, int x, int y){ for(i=4; i<6; i++) idct(block[i]); } +/* Note transform is: +y= ( 1b + 4g + 2r)/14 +cb=( 3b - 2g - 1r)/14 +cr=(-1b - 4g + 5r)/14 +*/ for(y=0; y<8; y++){ for(x=0; x<8; x++){ DCTELEM *temp= block[(x>>2) + 2*(y>>2)] + 2*(x&3) + 2*8*(y&3); //FIXME optimize -- cgit v1.2.3