While decoding you need to make sure you do not get values < 0 or > 255. Note that since this code will also be used in userspace utilities the clamp macro isn't used since that is kernel-only.
Signed-off-by: Hans Verkuil <[email protected]> --- drivers/media/platform/vicodec/codec-fwht.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/vicodec/codec-fwht.c b/drivers/media/platform/vicodec/codec-fwht.c index f91f90f7e5fc..47939160560e 100644 --- a/drivers/media/platform/vicodec/codec-fwht.c +++ b/drivers/media/platform/vicodec/codec-fwht.c @@ -625,8 +625,14 @@ static void fill_decoder_block(u8 *dst, const s16 *input, int stride) int i, j; for (i = 0; i < 8; i++) { - for (j = 0; j < 8; j++) - *dst++ = *input++; + for (j = 0; j < 8; j++, input++, dst++) { + if (*input < 0) + *dst = 0; + else if (*input > 255) + *dst = 255; + else + *dst = *input; + } dst += stride - 8; } } -- 2.18.0
