ref: b02c4d364f53e14ddae000552a1ddadbc7ceef8f
parent: 1ff94fea5639c1c7c4bc99a080aaa985d60d25b7
author: Ronald S. Bultje <[email protected]>
date: Fri Jul 12 08:59:19 EDT 2013
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
--- a/vpx_scale/yv12config.h
+++ b/vpx_scale/yv12config.h
@@ -18,7 +18,7 @@
#include "vpx/vpx_integer.h"
#define VP8BORDERINPIXELS 32
-#define VP9BORDERINPIXELS 96
+#define VP9BORDERINPIXELS 160
#define VP9_INTERP_EXTEND 4
/*************************************