linux-kernel - Re: [PATCH v7 04/13] media: hevc: Add fields and flags for hevc PPS

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Date:   Mon, 29 Mar 2021 16:27:31 -0300
From:   Ezequiel Garcia <ezequiel@...labora.com>
To:     Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        p.zabel@...gutronix.de, mchehab@...nel.org, robh+dt@...nel.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, festevam@...il.com,
        lee.jones@...aro.org, gregkh@...uxfoundation.org,
        mripard@...nel.org, paul.kocialkowski@...tlin.com, wens@...e.org,
        jernej.skrabec@...l.net, hverkuil-cisco@...all.nl,
        emil.l.velikov@...il.com
Cc:     kernel@...gutronix.de, linux-imx@....com,
        linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
        kernel@...labora.com
Subject: Re: [PATCH v7 04/13] media: hevc: Add fields and flags for hevc PPS

On Mon, 2021-03-29 at 08:57 +0200, Benjamin Gaignard wrote:
> Add fields and flags as they are defined in
> 7.4.3.3.1 "General picture parameter set RBSP semantics of the
> H.265 ITU specification.
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>

Reviewed-by: Ezequiel Garcia <ezequiel@...labora.com>

> ---
>  .../userspace-api/media/v4l/ext-ctrls-codec.rst    | 14 ++++++++++++++
>  include/media/hevc-ctrls.h                         |  4 ++++
>  2 files changed, 18 insertions(+)
> 
> diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> index 188aef8e40d0..92314aec655a 100644
> --- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> @@ -2967,6 +2967,12 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
>      * - __u8
>        - ``num_extra_slice_header_bits``
>        -
> +    * - __u8
> +      - ``num_ref_idx_l0_default_active_minus1``
> +      - Specifies the inferred value of num_ref_idx_l0_active_minus1
> +    * - __u8
> +      - ``num_ref_idx_l1_default_active_minus1``
> +      - Specifies the inferred value of num_ref_idx_l1_active_minus1
>      * - __s8
>        - ``init_qp_minus26``
>        -
> @@ -3077,6 +3083,14 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
>      * - ``V4L2_HEVC_PPS_FLAG_SLICE_SEGMENT_HEADER_EXTENSION_PRESENT``
>        - 0x00040000
>        -
> +    * - ``V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT``
> +      - 0x00080000
> +      - Specifies the presence of deblocking filter control syntax elements in
> +        the PPS
> +    * - ``V4L2_HEVC_PPS_FLAG_UNIFORM_SPACING``
> +      - 0x00100000
> +      - Specifies that tile column boundaries and likewise tile row boundaries
> +        are distributed uniformly across the picture
>  
>  .. raw:: latex
>  
> diff --git a/include/media/hevc-ctrls.h b/include/media/hevc-ctrls.h
> index b4cb2ef02f17..003f819ecb26 100644
> --- a/include/media/hevc-ctrls.h
> +++ b/include/media/hevc-ctrls.h
> @@ -100,10 +100,14 @@ struct v4l2_ctrl_hevc_sps {
>  #define V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER       (1ULL << 16)
>  #define V4L2_HEVC_PPS_FLAG_LISTS_MODIFICATION_PRESENT          (1ULL << 17)
>  #define V4L2_HEVC_PPS_FLAG_SLICE_SEGMENT_HEADER_EXTENSION_PRESENT (1ULL << 18)
> +#define V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT   (1ULL << 19)
> +#define V4L2_HEVC_PPS_FLAG_UNIFORM_SPACING                     (1ULL << 20)
>  
>  struct v4l2_ctrl_hevc_pps {
>         /* ISO/IEC 23008-2, ITU-T Rec. H.265: Picture parameter set */
>         __u8    num_extra_slice_header_bits;
> +       __u8    num_ref_idx_l0_default_active_minus1;
> +       __u8    num_ref_idx_l1_default_active_minus1;
>         __s8    init_qp_minus26;
>         __u8    diff_cu_qp_delta_depth;
>         __s8    pps_cb_qp_offset;