[FFmpeg-devel] [PATCH] lavfi/tests: Fix 16-bit vf_blend test to avoid memory not aligned to 2 bytes

[Andrey Semashev]

On 05/24/18 00:07, Andrey Semashev wrote:
> 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

Ping? Any comments?

> ---
>   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,                           \
>