Commit b02c4d36 authored by Ronald S. Bultje's avatar Ronald S. Bultje
Browse files

Increase border size from 96 to 160.

This is required because upon downscaling, if a motion vector points
partially into the UMV (e.g. all minus 1 of 64+7 pixels, i.e. 70),
then we can point up to 140 pixels into the larger-resolution (2x)
reference buffer UMV, which means the UMV for reference buffers in
downscaling needs to be 140 rounded up to the nearest multiple of 32,
i.e. 160.

Longer-term, we should probably handle the UMV differently by detecting
edge coverage on-the-fly and using a temporary buffer for edge extensions
instead of adding 160 pixels on all sides of the image (which means a
CIF image uses 3x its own area size for borders).

Change-Id: I5184443e6731cd6721fc6a5d430a53e7d91b4f7e
parent 1ff94fea
......@@ -18,7 +18,7 @@ extern "C" {
#include "vpx/vpx_integer.h"
#define VP8BORDERINPIXELS 32
#define VP9BORDERINPIXELS 96
#define VP9BORDERINPIXELS 160
#define VP9_INTERP_EXTEND 4
/*************************************
......
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