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SubjectRe: [Patch v3 11/11] Documention: v4l: Documentation for HEVC CIDs
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On 03/31/2017 11:06 AM, Smitha T Murthy wrote:
> Added V4l2 controls for HEVC encoder
>
> Signed-off-by: Smitha T Murthy <smitha.t@samsung.com>
> ---
> Documentation/media/uapi/v4l/extended-controls.rst | 355 +++++++++++++++++++++
> 1 file changed, 355 insertions(+)
>
> diff --git a/Documentation/media/uapi/v4l/extended-controls.rst b/Documentation/media/uapi/v4l/extended-controls.rst
> index abb1057..c2f3c5e 100644
> --- a/Documentation/media/uapi/v4l/extended-controls.rst
> +++ b/Documentation/media/uapi/v4l/extended-controls.rst
> @@ -1960,6 +1960,361 @@ enum v4l2_vp8_golden_frame_sel -
> 1, 2 and 3 corresponding to encoder profiles 0, 1, 2 and 3.
>
>
> +HEVC Control Reference
> +---------------------
> +
> +The HEVC controls include controls for encoding parameters of HEVC video
> +codec.

A general question: are all these controls directly related to the HEVC specification,
or are there controls that are specific to the exynos HW implementation?

Any exynos specific controls should be split off from the standard controls.

Regards,

Hans

> +
> +
> +.. _hevc-control-id:
> +
> +HEVC Control IDs
> +^^^^^^^^^^^^^^^
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP``
> + Minimum quantization parameter for HEVC.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP``
> + Maximum quantization parameter for HEVC.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_QP``
> + Quantization parameter for an I frame for HEVC.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_QP``
> + Quantization parameter for a P frame for HEVC.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_QP``
> + Quantization parameter for a B frame for HEVC.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIERARCHICAL_QP``
> + HIERARCHICAL_QP allows 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.
> +
> +.. _v4l2-hevc-hierarchical-coding-type:
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIERARCHICAL_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_HIERARCHICAL_CODING_LAYER``
> + 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_HIERARCHICAL_CODING_LAYER_QP``
> + Indicates the hierarchical coding layer quantization parameter.
> + For HEVC it can have a value of 0-51. Hence in the control value passed
> + the LSB 16 bits will indicate the quantization parameter. The MSB 16 bit
> + will pass the layer(0-6) it is meant for.
> +
> +.. _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.
> +
> +.. raw:: latex
> +
> + \end{adjustbox}
> +
> +
> +.. _v4l2-hevc-level:
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_LEVEL``
> + (enum)
> +
> +enum v4l2_mpeg_video_hevc_level -
> + Select 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``
> + Indicates the number of evenly spaced subintervals, called ticks, within
> + one modulo time. One modulo time represents the fixed interval of one
> + second. This is a 16bit unsigned integer and has a maximum value upto
> + 0xffff.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_TIER_FLAG``
> + TIER_FLAG specifies tier 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_flag as Main tier and setting this
> + flag to 1 indicates High tier. High tier is for very demanding applications
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_MAX_PARTITION_DEPTH``
> + Selects HEVC maximum coding unit depth.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_REF_NUMBER_FOR_PFRAMES``
> + Selects number of P reference picture required for HEVC encoder.
> + P-Frame can use 1 or 2 frames for reference.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_LF``
> + Indicates loop filtering. Control ID 0 indicates loop filtering
> + is enabled and when set to 1 indicates no filter.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_LF_SLICE_BOUNDARY``
> + Selects whether to apply the loop filter across the slice boundary or not.
> + If the value is 0, loop filter will not be applied across the slice boundary.
> + If the value is 1, loop filter will be applied across the slice boundary.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_LF_BETA_OFFSET_DIV2``
> + Selects HEVC loop filter beta offset. The valid range is [-6, +6].
> + This could be a negative value in the 2's complement expression.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_LF_TC_OFFSET_DIV2``
> + Selects HEVC loop filter tc offset. The valid range is [-6, +6].
> + This could be a negative value in the 2's complement expression.
> +
> +.. _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
> + 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 picture encoding.
> +
> +.. raw:: latex
> +
> + \end{adjustbox}
> +
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD``
> + Selects the refresh period for HEVC encoder.
> + This specifies the number of I picture between two CRA/IDR pictures.
> + This is valid only if REFRESH_TYPE is not 0.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_LOSSLESS_CU``
> + 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``
> + 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 it to 1 enables this control ID and
> + setting it to 0 disables the control ID.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_WAVEFRONT``
> + Indicates wavefront parallel processing for HEVC encoder. Setting it to 0
> + disables the control ID and setting it to 1 enables the wavefront parallel
> + processing.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_SIGN_DATA_HIDING``
> + Setting it to 1 indicates sign data hiding for HEVC encoder. Setting it to
> + 0 disables the control ID.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_GENERAL_PB``
> + Setting the control ID to 1 enables general picture buffers for HEVC
> + encoder.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_TEMPORAL_ID``
> + Indicates temporal identifier specified as temporal_id in
> + nal_unit_header_svc_extension() for HEVC encoder which is enabled by
> + setting the control ID to 1.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_STRONG_SMOOTHING``
> + 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``
> + Indicates max number of merge candidate motion vectors.
> + Values are from zero to four.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_ADAPTIVE_RC_DARK``
> + Indicates HEVC dark region adaptive rate control.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_ADAPTIVE_RC_SMOOTH``
> + Indicates HEVC smooth region adaptive rate control.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_ADAPTIVE_RC_STATIC``
> + Indicates HEVC static region adaptive rate control.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_ADAPTIVE_RC_ACTIVITY``
> + Indicates HEVC activity region adaptive rate control.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_INTRA_PU_SPLIT``
> + Indicates intra prediction unit split for HEVC Encoder. Setting it to 1
> + disables the feature. Setting it to 1 enables the feature.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_TMV_PREDICTION``
> + Indicates temporal motion vector prediction for HEVC encoder. Setting it to
> + 0 enables the prediction. Setting it to 1 disables the prediction.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_WITHOUT_STARTCODE``
> + Specifies if HEVC generates a stream with a size of length field instead of
> + start code pattern. The size of the length field is configurable among 1,2
> + or 4 thorugh the SIZE_OF_LENGTH_FIELD. It is not applied at SEQ_START.
> + Setting it to 0 disables the control ID. Setting it to 1 will enables
> + the control ID.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_QP_INDEX_CR``
> + Indicates the quantization parameter CR index.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_QP_INDEX_CB``
> + Indicates the quantization parameter CB index.
> +
> +.. _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_PREPEND_SPSPPS_TO_IDR``
> + Indicates whether to generate SPS and PPS at every IDR. Setting it to 0
> + disables it and setting it to one enables the feature.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_LAYER_CH``
> + Indicates hierarchical coding layer change for HEVC encoder.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER0_BITRATE``
> + Indicates bit rate for hierarchical coding layer 0 for HEVC encoder.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER1_BITRATE``
> + Indicates bit rate for hierarchical coding layer 1 for HEVC encoder.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER2_BITRATE``
> + Indicates bit rate for hierarchical coding layer 2 for HEVC encoder.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER3_BITRATE``
> + Indicates bit rate for hierarchical coding layer 3 for HEVC encoder.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER4_BITRATE``
> + Indicates bit rate for hierarchical coding layer 4 for HEVC encoder.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER5_BITRATE``
> + Indicates bit rate for hierarchical coding layer 5 for HEVC encoder.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER6_BITRATE``
> + Indicates bit rate for hierarchical coding layer 6 for HEVC encoder.
> +
> +
> .. _camera-controls:
>
> Camera Control Reference
>

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