Re: [PATCH v1 13/24] media: rkvdec: h264: Fix reference frame_num wrap for second field

Sebastian Fricke
2022-03-29T15:17:11Z

Hey Nicolas,

On 28.03.2022 15:59, 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>

Greetings,
Sebastian

>---
> 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 dff89732ddd0..842d8cd80e90 100644
>--- a/drivers/staging/media/rkvdec/rkvdec-h264.c
>+++ b/drivers/staging/media/rkvdec/rkvdec-h264.c
>@@ -752,7 +752,7 @@ 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