From b02c4d364f53e14ddae000552a1ddadbc7ceef8f Mon Sep 17 00:00:00 2001
From: "Ronald S. Bultje" <rbultje@google.com>
Date: Fri, 12 Jul 2013 12:59:19 -0700
Subject: [PATCH] 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
---
vpx_scale/yv12config.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/vpx_scale/yv12config.h b/vpx_scale/yv12config.h
index c351370412..a934a94bd5 100644
--- a/vpx_scale/yv12config.h
+++ b/vpx_scale/yv12config.h
@@ -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
/*************************************
--
GitLab