Corrected handling of border pixels when unpacking YUV. Example (bottom line):
https://github.com/BitMiracle/libtiff.net/blob/master/TestCase/ycbcr-cat.tif
From 09f9822d8d38f26ff386df3d01794fcafe3f3869 Mon Sep 17 00:00:00 2001
From: Pavel Skakov <pave...@gmail.com>
Date: Thu, 10 Oct 2019 02:21:06 +0300
Subject: [PATCH 1/4] avcodec/tiff: correct unpacking of border YUV pixels
Signed-off-by: Pavel Skakov <pave...@gmail.com>
---
libavcodec/tiff.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c
index 069792b4c3..70c49f7d44 100644
--- a/libavcodec/tiff.c
+++ b/libavcodec/tiff.c
@@ -369,8 +369,11 @@ static void unpack_yuv(TiffContext *s, AVFrame *p,
for (i = 0; i < w; i++) {
for (j = 0; j < s->subsampling[1]; j++)
for (k = 0; k < s->subsampling[0]; k++)
- p->data[0][FFMIN(lnum + j, s->height-1) * p->linesize[0] +
- FFMIN(i * s->subsampling[0] + k, s->width-1)] = *src++;
+ if (j < s->height - lnum && i * s->subsampling[0] + k < s->width) {
+ p->data[0][(lnum + j) * p->linesize[0] + i * s->subsampling[0] + k] = *src++;
+ } else {
+ src++;
+ }
*pu++ = *src++;
*pv++ = *src++;
}
--
2.13.2.windows.1
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