From 2cc454705b695aa1e39abf850929387baa958629 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 21 Aug 2007 19:44:05 +0000 Subject: [PATCH] more complete dc prediction description Originally committed as revision 10177 to svn://svn.ffmpeg.org/ffmpeg/trunk --- doc/snow.txt | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/doc/snow.txt b/doc/snow.txt index 867867394f..c3e16ebc1c 100644 --- a/doc/snow.txt +++ b/doc/snow.txt @@ -225,6 +225,11 @@ Intra DC Predicton: the luma and chroma values of the left block are used as predictors the used luma and chroma is the sum of the predictor and y_diff, cb_diff, cr_diff +to reverse this in the decoder apply the following: +block[y][x].dc[0] += block[y][x-1].dc[0]; +block[y][x].dc[1] += block[y][x-1].dc[1]; +block[y][x].dc[2] += block[y][x-1].dc[2]; +block[*][-1].dc[*]= 128; Motion Compensation: