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ffmpeg.wasm-core
Commit 2cc45470 authored by Michael Niedermayer's avatar Michael Niedermayer
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more complete dc prediction description 

Originally committed as revision 10177 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 1e37b7e4
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doc/snow.txt
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...@@ -225,6 +225,11 @@ Intra DC Predicton: ...@@ -225,6 +225,11 @@ Intra DC Predicton:
the luma and chroma values of the left block are used as predictors 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 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: Motion Compensation:
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