[FFmpeg-cvslog] lavfi/tests: Fix 16-bit vf_blend test to avoid memory not aligned to 2 bytes
Andrey Semashev
git at videolan.org
Wed May 30 03:49:45 EEST 2018
ffmpeg | branch: master | Andrey Semashev <andrey.semashev at gmail.com> | Thu May 24 00:07:36 2018 +0300| [d7eb8d84757155c1fb0fe1a8269025e22e9bf0ec] | committer: Michael Niedermayer
lavfi/tests: Fix 16-bit vf_blend test to avoid memory not aligned to 2 bytes
Generic C implementation of vf_blend performs reads and writes of 16-bit
elements, which requires the buffers to be aligned to at least 2-byte
boundary.
Also, the change fixes source buffer overrun caused by src_offset being
added to to test handling of misaligned buffers.
Fixes: #7226
Reviewed-by: Paul B Mahol <onemda at gmail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d7eb8d84757155c1fb0fe1a8269025e22e9bf0ec
---
tests/checkasm/vf_blend.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tests/checkasm/vf_blend.c b/tests/checkasm/vf_blend.c
index 912f3a2c38..a7578fec39 100644
--- a/tests/checkasm/vf_blend.c
+++ b/tests/checkasm/vf_blend.c
@@ -71,7 +71,7 @@
w = WIDTH / depth; \
\
for (i = 0; i < BUF_UNITS - 1; i++) { \
- int src_offset = i * SIZE_PER_UNIT + i; /* Test various alignments */ \
+ int src_offset = i * SIZE_PER_UNIT + (BUF_UNITS - 1 - i) * depth; /* Test various alignments */ \
int dst_offset = i * SIZE_PER_UNIT; /* dst must be aligned */ \
randomize_buffers(); \
call_ref(top1 + src_offset, w, bot1 + src_offset, w, \
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