Message-ID: <1519744718.1116.11.camel@ndufresne.ca>
Date:   Tue, 27 Feb 2018 10:18:38 -0500
From:   Nicolas Dufresne <nicolas@...fresne.ca>
To:     Smitha T Murthy <smitha.t@...sung.com>,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     kyungmin.park@...sung.com, kamil@...as.org, jtp.park@...sung.com,
        a.hajda@...sung.com, mchehab@...nel.org, pankaj.dubey@...sung.com,
        krzk@...nel.org, m.szyprowski@...sung.com, s.nawrocki@...sung.com
Subject: Re: [Patch v8 12/12] Documention: v4l: Documentation for HEVC CIDs

Le vendredi 02 février 2018 à 17:55 +0530, Smitha T Murthy a écrit :
> Added V4l2 controls for HEVC encoder
> 
> Signed-off-by: Smitha T Murthy <smitha.t@...sung.com>
> ---
>  Documentation/media/uapi/v4l/extended-controls.rst | 410
> +++++++++++++++++++++
>  1 file changed, 410 insertions(+)
> 
> diff --git a/Documentation/media/uapi/v4l/extended-controls.rst
> b/Documentation/media/uapi/v4l/extended-controls.rst
> index dfe49ae..cb0a64a 100644
> --- a/Documentation/media/uapi/v4l/extended-controls.rst
> +++ b/Documentation/media/uapi/v4l/extended-controls.rst
> @@ -1960,6 +1960,416 @@ enum v4l2_vp8_golden_frame_sel -
>      1, 2 and 3 corresponding to encoder profiles 0, 1, 2 and 3.
>  
>  
> +High Efficiency Video Coding (HEVC/H.265) Control Reference
> +-----------------------------------------------------------
> +
> +The HEVC/H.265 controls include controls for encoding parameters of
> HEVC/H.265
> +video codec.
> +
> +
> +.. _hevc-control-id:
> +
> +HEVC/H.265 Control IDs
> +^^^^^^^^^^^^^^^^^^^^^^
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP (integer)``
> +    Minimum quantization parameter for HEVC.
> +    Valid range: from 0 to 51.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP (integer)``
> +    Maximum quantization parameter for HEVC.
> +    Valid range: from 0 to 51.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_QP (integer)``
> +    Quantization parameter for an I frame for HEVC.
> +    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
> +    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_QP (integer)``
> +    Quantization parameter for a P frame for HEVC.
> +    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
> +    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_QP (integer)``
> +    Quantization parameter for a B frame for HEVC.
> +    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
> +    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_QP (boolean)``
> +    HIERARCHICAL_QP allows the host to specify the quantization
> parameter
> +    values for each temporal layer through HIERARCHICAL_QP_LAYER.
> This is
> +    valid only if HIERARCHICAL_CODING_LAYER is greater than 1.
> Setting the
> +    control value to 1 enables setting of the QP values for the
> layers.
> +
> +.. _v4l2-hevc-hier-coding-type:
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE``
> +    (enum)
> +
> +enum v4l2_mpeg_video_hevc_hier_coding_type -
> +    Selects the hierarchical coding type for encoding. Possible
> values are:
> +
> +.. raw:: latex
> +
> +    \begin{adjustbox}{width=\columnwidth}
> +
> +.. tabularcolumns:: |p{11.0cm}|p{10.0cm}|
> +
> +.. flat-table::
> +    :header-rows:  0
> +    :stub-columns: 0
> +
> +    * - ``V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_B``
> +      - Use the B frame for hierarchical coding.
> +    * - ``V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_P``
> +      - Use the P frame for hierarchical coding.
> +
> +.. raw:: latex
> +
> +    \end{adjustbox}
> +
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER (integer)``
> +    Selects the hierarchical coding layer. In normal encoding
> +    (non-hierarchial coding), it should be zero. Possible values are
> [0, 6].
> +    0 indicates HIERARCHICAL CODING LAYER 0, 1 indicates
> HIERARCHICAL CODING
> +    LAYER 1 and so on.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_QP (integer)``
> +    Indicates quantization parameter for hierarchical coding layer
> 0.
> +    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
> +    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_QP (integer)``
> +    Indicates quantization parameter for hierarchical coding layer
> 1.
> +    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
> +    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_QP (integer)``
> +    Indicates quantization parameter for hierarchical coding layer
> 2.
> +    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
> +    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_QP (integer)``
> +    Indicates quantization parameter for hierarchical coding layer
> 3.
> +    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
> +    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_QP (integer)``
> +    Indicates quantization parameter for hierarchical coding layer
> 4.
> +    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
> +    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_QP (integer)``
> +    Indicates quantization parameter for hierarchical coding layer
> 5.
> +    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
> +    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_QP (integer)``
> +    Indicates quantization parameter for hierarchical coding layer
> 6.
> +    Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
> +    V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
> +
> +.. _v4l2-hevc-profile:
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_PROFILE``
> +    (enum)
> +
> +enum v4l2_mpeg_video_hevc_profile -
> +    Select the desired profile for HEVC encoder.
> +
> +.. raw:: latex
> +
> +    \begin{adjustbox}{width=\columnwidth}
> +
> +.. tabularcolumns:: |p{11.0cm}|p{10.0cm}|
> +
> +.. flat-table::
> +    :header-rows:  0
> +    :stub-columns: 0
> +
> +    * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN``
> +      - Main profile.
> +    * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_STILL_PICTURE``
> +      - Main still picture profile.
> +    * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN10``

Just a nit pick, but we have in AVC HIGH_10, to be consistent should be
name this one MAIN_10 ?

> +      - Main 10 profile.
> +
> +.. raw:: latex
> +
> +    \end{adjustbox}
> +
> +
> +.. _v4l2-hevc-level:
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_LEVEL``
> +    (enum)
> +
> +enum v4l2_mpeg_video_hevc_level -
> +    Selects the desired level for HEVC encoder.
> +
> +.. raw:: latex
> +
> +    \begin{adjustbox}{width=\columnwidth}
> +
> +.. tabularcolumns:: |p{11.0cm}|p{10.0cm}|
> +
> +.. flat-table::
> +    :header-rows:  0
> +    :stub-columns: 0
> +
> +    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_1``
> +      - Level 1.0
> +    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_2``
> +      - Level 2.0
> +    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_2_1``
> +      - Level 2.1
> +    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_3``
> +      - Level 3.0
> +    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_3_1``
> +      - Level 3.1
> +    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_4``
> +      - Level 4.0
> +    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_4_1``
> +      - Level 4.1
> +    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_5``
> +      - Level 5.0
> +    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_5_1``
> +      - Level 5.1
> +    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_5_2``
> +      - Level 5.2
> +    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_6``
> +      - Level 6.0
> +    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_6_1``
> +      - Level 6.1
> +    * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_6_2``
> +      - Level 6.2
> +
> +.. raw:: latex
> +
> +    \end{adjustbox}
> +
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_FRAME_RATE_RESOLUTION (integer)``
> +    Indicates the number of evenly spaced subintervals, called
> ticks, within
> +    one second. This is a 16 bit unsigned integer and has a maximum
> value up to
> +    0xffff and a minimum value of 1.
> +
> +.. _v4l2-hevc-tier:
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_TIER``
> +    (enum)
> +
> +enum v4l2_mpeg_video_hevc_tier -
> +    TIER_FLAG specifies tiers information of the HEVC encoded
> picture. Tier
> +    were made to deal with applications that differ in terms of
> maximum bit
> +    rate. Setting the flag to 0 selects HEVC tier as Main tier and
> setting
> +    this flag to 1 indicates High tier. High tier is for
> applications requiring
> +    high bit rates.
> +
> +.. raw:: latex
> +
> +    \begin{adjustbox}{width=\columnwidth}
> +
> +.. tabularcolumns:: |p{11.0cm}|p{10.0cm}|
> +
> +.. flat-table::
> +    :header-rows:  0
> +    :stub-columns: 0
> +
> +    * - ``V4L2_MPEG_VIDEO_HEVC_TIER_MAIN``
> +      - Main tier.
> +    * - ``V4L2_MPEG_VIDEO_HEVC_TIER_HIGH``
> +      - High tier.
> +
> +.. raw:: latex
> +
> +    \end{adjustbox}
> +
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_MAX_PARTITION_DEPTH (integer)``
> +    Selects HEVC maximum coding unit depth.
> +
> +.. _v4l2-hevc-loop-filter-mode:
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE``
> +    (enum)
> +
> +enum v4l2_mpeg_video_hevc_loop_filter_mode -
> +    Loop filter mode for HEVC encoder. Possible values are:
> +
> +.. raw:: latex
> +
> +    \begin{adjustbox}{width=\columnwidth}
> +
> +.. tabularcolumns:: |p{11.0cm}|p{10.0cm}|
> +
> +.. flat-table::
> +    :header-rows:  0
> +    :stub-columns: 0
> +
> +    * - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_DISABLED``
> +      - Loop filter is disabled.
> +    * - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_ENABLED``
> +      - Loop filter is enabled.
> +    * -
> ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY``
> +      - Loop filter is disabled at the slice boundary.
> +
> +.. raw:: latex
> +
> +    \end{adjustbox}
> +
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_LF_BETA_OFFSET_DIV2 (integer)``
> +    Selects HEVC loop filter beta offset. The valid range is [-6,
> +6].
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_LF_TC_OFFSET_DIV2 (integer)``
> +    Selects HEVC loop filter tc offset. The valid range is [-6, +6].
> +
> +.. _v4l2-hevc-refresh-type:
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE``
> +    (enum)
> +
> +enum v4l2_mpeg_video_hevc_hier_refresh_type -
> +    Selects refresh type for HEVC encoder.
> +    Host has to specify the period into
> +    V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD.
> +
> +.. raw:: latex
> +
> +    \begin{adjustbox}{width=\columnwidth}
> +
> +.. tabularcolumns:: |p{11.0cm}|p{10.0cm}|
> +
> +.. flat-table::
> +    :header-rows:  0
> +    :stub-columns: 0
> +
> +    * - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_NONE``
> +      - Use the B frame for hierarchical coding.
> +    * - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_CRA``
> +      - Use CRA (Clean Random Access Unit) picture encoding.
> +    * - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_IDR``
> +      - Use IDR (Instantaneous Decoding Refresh) picture encoding.
> +
> +.. raw:: latex
> +
> +    \end{adjustbox}
> +
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD (integer)``
> +    Selects the refresh period for HEVC encoder.
> +    This specifies the number of I pictures between two CRA/IDR
> pictures.
> +    This is valid only if REFRESH_TYPE is not 0.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_LOSSLESS_CU (boolean)``
> +    Indicates HEVC lossless encoding. Setting it to 0 disables
> lossless
> +    encoding. Setting it to 1 enables lossless encoding.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_CONST_INTRA_PRED (boolean)``
> +    Indicates constant intra prediction for HEVC encoder. Specifies
> the
> +    constrained intra prediction in which intra largest coding unit
> (LCU)
> +    prediction is performed by using residual data and decoded
> samples of
> +    neighboring intra LCU only. Setting the value to 1 enables
> constant intra
> +    prediction and setting the value to 0 disables constant intra
> prediction.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_WAVEFRONT (boolean)``
> +    Indicates wavefront parallel processing for HEVC encoder.
> Setting it to 0
> +    disables the feature and setting it to 1 enables the wavefront
> parallel
> +    processing.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_GENERAL_PB (boolean)``
> +    Setting the value to 1 enables combination of P and B frame for
> HEVC
> +    encoder.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_TEMPORAL_ID (boolean)``
> +    Indicates temporal identifier for HEVC encoder which is enabled
> by
> +    setting the value to 1.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_STRONG_SMOOTHING (boolean)``
> +    Indicates bi-linear interpolation is conditionally used in the
> intra
> +    prediction filtering process in the CVS when set to 1. Indicates
> bi-linear
> +    interpolation is not used in the CVS when set to 0.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_MAX_NUM_MERGE_MV_MINUS1 (integer)``
> +    Indicates maximum number of merge candidate motion vectors.
> +    Values are from 0 to 4.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_TMV_PREDICTION (boolean)``
> +    Indicates temporal motion vector prediction for HEVC encoder.
> Setting it to
> +    1 enables the prediction. Setting it to 0 disables the
> prediction.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_WITHOUT_STARTCODE (boolean)``
> +    Specifies if HEVC generates a stream with a size of the length
> field
> +    instead of start code pattern. The size of the length field is
> configurable
> +    through the V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD
> control. Setting
> +    the value to 0 disables encoding without startcode pattern.
> Setting the
> +    value to 1 will enables encoding without startcode pattern.
> +
> +.. _v4l2-hevc-size-of-length-field:
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD``
> +(enum)
> +
> +enum v4l2_mpeg_video_hevc_size_of_length_field -
> +    Indicates the size of length field.
> +    This is valid when encoding WITHOUT_STARTCODE_ENABLE is enabled.
> +
> +.. raw:: latex
> +
> +    \begin{adjustbox}{width=\columnwidth}
> +
> +.. tabularcolumns:: |p{11.0cm}|p{10.0cm}|
> +
> +.. flat-table::
> +    :header-rows:  0
> +    :stub-columns: 0
> +
> +    * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_0``
> +      - Generate start code pattern (Normal).
> +    * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_1``
> +      - Generate size of length field instead of start code pattern
> and length is 1.
> +    * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_2``
> +      - Generate size of length field instead of start code pattern
> and length is 2.
> +    * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_4``
> +      - Generate size of length field instead of start code pattern
> and length is 4.
> +
> +.. raw:: latex
> +
> +    \end{adjustbox}
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_BR (integer)``
> +    Indicates bit rate for hierarchical coding layer 0 for HEVC
> encoder.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_BR (integer)``
> +    Indicates bit rate for hierarchical coding layer 1 for HEVC
> encoder.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_BR (integer)``
> +    Indicates bit rate for hierarchical coding layer 2 for HEVC
> encoder.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_BR (integer)``
> +    Indicates bit rate for hierarchical coding layer 3 for HEVC
> encoder.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_BR (integer)``
> +    Indicates bit rate for hierarchical coding layer 4 for HEVC
> encoder.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_BR (integer)``
> +    Indicates bit rate for hierarchical coding layer 5 for HEVC
> encoder.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_BR (integer)``
> +    Indicates bit rate for hierarchical coding layer 6 for HEVC
> encoder.
> +
> +``V4L2_CID_MPEG_VIDEO_REF_NUMBER_FOR_PFRAMES (integer)``
> +    Selects number of P reference pictures required for HEVC
> encoder.
> +    P-Frame can use 1 or 2 frames for reference.
> +
> +``V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR (integer)``
> +    Indicates whether to generate SPS and PPS at every IDR. Setting
> it to 0
> +    disables generating SPS and PPS at every IDR. Setting it to one
> enables
> +    generating SPS and PPS at every IDR.
> +
> +
>  .. _camera-controls:
>  
>  Camera Control Reference
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