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Subject: Re: [PATCH 1/2] media: hevc: Add segment address field
To:     Jernej Skrabec <jernej.skrabec@gmail.com>, mripard@kernel.org,
        paul.kocialkowski@bootlin.com
Cc:     mchehab@kernel.org, gregkh@linuxfoundation.org, wens@csie.org,
        hverkuil-cisco@xs4all.nl, ezequiel@collabora.com,
        linux-media@vger.kernel.org, linux-staging@lists.linux.dev,
        linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev,
        linux-kernel@vger.kernel.org
References: <20210606082314.454193-1-jernej.skrabec@gmail.com>
 <20210606082314.454193-2-jernej.skrabec@gmail.com>
From:   Benjamin Gaignard <benjamin.gaignard@collabora.com>
Message-ID: <82dfa0fa-995a-93af-dce7-79763e762cc3@collabora.com>
Date:   Mon, 7 Jun 2021 09:43:20 +0200
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Le 06/06/2021 à 10:23, Jernej Skrabec a écrit :
> If HEVC frame consists of multiple slices, segment address has to be
> known in order to properly decode it.
>
> Add segment address field to slice parameters.
>
> Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>

Reviewed-by Benjamin Gaignard <benjamin.gaignard@collabora.com>

> ---
>   Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst | 3 +++
>   include/media/hevc-ctrls.h                                | 3 ++-
>   2 files changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> index 9120c5bcaf90..fac4b477da82 100644
> --- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> @@ -2997,6 +2997,9 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
>       * - __u8
>         - ``pic_struct``
>         -
> +    * - __u32
> +      - ``slice_segment_addr``
> +      -
>       * - __u8
>         - ``ref_idx_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
>         - The list of L0 reference elements as indices in the DPB.
> diff --git a/include/media/hevc-ctrls.h b/include/media/hevc-ctrls.h
> index dc964ff7cd29..19f8e2ad3375 100644
> --- a/include/media/hevc-ctrls.h
> +++ b/include/media/hevc-ctrls.h
> @@ -197,10 +197,11 @@ struct v4l2_ctrl_hevc_slice_params {
>   	__u8	pic_struct;
>   
>   	/* ISO/IEC 23008-2, ITU-T Rec. H.265: General slice segment header */
> +	__u32	slice_segment_addr;
>   	__u8	ref_idx_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
>   	__u8	ref_idx_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
>   
> -	__u8	padding[5];
> +	__u8	padding;
>   
>   	/* ISO/IEC 23008-2, ITU-T Rec. H.265: Weighted prediction parameter */
>   	struct v4l2_hevc_pred_weight_table pred_weight_table;