Re: [PATCH v2 16/23] media: rkvdec: h264: Fix reference frame_num wrap for second field

Ezequiel Garcia
2022-04-02T11:34:07Z

Hi Nicolas,

On Thu, Mar 31, 2022 at 03:37:18PM -0400, Nicolas Dufresne wrote:
> From: Jonas Karlman <jonas@kwiboo.se>
>
> When decoding the second field in a complementary field pair the second
> field is sharing the same frame_num with the first field.
>
> Currently the frame_num for the first field is wrapped when it matches the
> field being decoded, this cause issues to decode the second field in a
> complementary field pair.
>
> Fix this by using inclusive comparison, less than or equal.
>
> Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
> Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com>
> Reviewed-by: Sebastian Fricke <sebastian.fricke@collabora.com>

To complete the Signed-off-by chain, can you add your Signed-off-by: at
the bottom?

Thanks,
Ezequiel

> ---
> drivers/staging/media/rkvdec/rkvdec-h264.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/staging/media/rkvdec/rkvdec-h264.c b/drivers/staging/media/rkvdec/rkvdec-h264.c
> index a42cf19bcc6d..730f8ebf7f58 100644
> --- a/drivers/staging/media/rkvdec/rkvdec-h264.c
> +++ b/drivers/staging/media/rkvdec/rkvdec-h264.c
> @@ -773,7 +773,7 @@ static void assemble_hw_rps(struct rkvdec_ctx *ctx,
> continue;
>
> if (dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM ||
> - dpb[i].frame_num < dec_params->frame_num) {
> + dpb[i].frame_num <= dec_params->frame_num) {
> p[i] = dpb[i].frame_num;
> continue;
> }
> --
> 2.34.1
>