media: Add AV1 uAPI

This patch adds the  AOMedia Video 1 (AV1) kernel uAPI.

This design is based on currently available AV1 API implementations and
aims to support the development of AV1 stateless video codecs
on Linux.

Signed-off-by: Daniel Almeida <daniel.almeida@collabora.com>
Co-developed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

12 files changed, 2335 insertions, 2 deletions

diff --git a/Documentation/userspace-api/media/v4l/biblio.rst b/Documentation/userspace-api/media/v4l/biblio.rst
index 9cd18c153d19..72aef1759b60 100644
--- a/Documentation/userspace-api/media/v4l/biblio.rst
+++ b/Documentation/userspace-api/media/v4l/biblio.rst
@@ -427,3 +427,12 @@ VP9
 :title:     VP9 Bitstream & Decoding Process Specification
 
 :author:    Adrian Grange (Google), Peter de Rivaz (Argon Design), Jonathan Hunt (Argon Design)
+
+.. _av1:
+
+AV1
+===
+
+:title:     AV1 Bitstream & Decoding Process Specification
+
+:author:    Peter de Rivaz, Argon Design Ltd, Jack Haughton, Argon Design Ltd
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec-stateless.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec-stateless.rst
index 677bf0fbcc5a..81e60f4002c8 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec-stateless.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec-stateless.rst
@@ -1890,11 +1890,11 @@ params syntax' of the :ref:`vp9` specification for more details.
     * - __u8
       - ``tree_probs[7]``
       - Specifies the probability values to be used when decoding a Segment-ID.
-        See '5.15. Segmentation map' section of :ref:`vp9` for more details.
+        See '5.15 Segmentation map' section of :ref:`vp9` for more details.
     * - __u8
       - ``pred_probs[3]``
       - Specifies the probability values to be used when decoding a
-        Predicted-Segment-ID. See '6.4.14. Get segment id syntax'
+        Predicted-Segment-ID. See '6.4.14 Get segment id syntax'
         section of :ref:`vp9` for more details.
     * - __u8
       - ``flags``
@@ -2957,3 +2957,1208 @@ This structure contains all loop filter related parameters. See sections
     * - ``V4L2_HEVC_DECODE_PARAM_FLAG_NO_OUTPUT_OF_PRIOR``
       - 0x00000004
       -
+
+.. _v4l2-codec-stateless-av1:
+
+``V4L2_CID_STATELESS_AV1_SEQUENCE (struct)``
+    Represents an AV1 Sequence OBU (Open Bitstream Unit). See section 5.5
+    "Sequence header OBU syntax" in :ref:`av1` for more details.
+
+.. c:type:: v4l2_ctrl_av1_sequence
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{5.8cm}|p{4.8cm}|p{6.6cm}|
+
+.. flat-table:: struct v4l2_ctrl_av1_sequence
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``flags``
+      - See :ref:`AV1 Sequence Flags <av1_sequence_flags>`.
+    * - __u8
+      - ``seq_profile``
+      - Specifies the features that can be used in the coded video sequence.
+    * - __u8
+      - ``order_hint_bits``
+      - Specifies the number of bits used for the order_hint field at each frame.
+    * - __u8
+      - ``bit_depth``
+      - the bit depth to use for the sequence as described in section 5.5.2
+        "Color config syntax" in :ref:`av1` for more details.
+    * - __u8
+      - ``reserved``
+      - Applications and drivers must set this to zero.
+    * - __u16
+      - ``max_frame_width_minus_1``
+      - specifies the maximum frame width minus 1 for the frames represented by
+        this sequence header.
+
+.. _av1_sequence_flags:
+
+``AV1 Sequence Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_AV1_SEQUENCE_FLAG_STILL_PICTURE``
+      - 0x00000001
+      - If set, specifies that the coded video sequence contains only one coded
+        frame. If not set, specifies that the coded video sequence contains one
+        or more coded frames.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_USE_128X128_SUPERBLOCK``
+      - 0x00000002
+      - If set, indicates that superblocks contain 128x128 luma samples.
+        When equal to 0, it indicates that superblocks contain 64x64 luma
+        samples. The number of contained chroma samples depends on
+        subsampling_x and subsampling_y.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_FILTER_INTRA``
+      - 0x00000004
+      - If set, specifies that the use_filter_intra syntax element may be
+        present. If not set, specifies that the use_filter_intra syntax element
+        will not be present.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_INTRA_EDGE_FILTER``
+      - 0x00000008
+      - Specifies whether the intra edge filtering process should be enabled.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_INTERINTRA_COMPOUND``
+      - 0x00000010
+      - If set, specifies that the mode info for inter blocks may contain the
+        syntax element interintra. If not set, specifies that the syntax element
+        interintra will not be present.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_MASKED_COMPOUND``
+      - 0x00000020
+      - If set, specifies that the mode info for inter blocks may contain the
+        syntax element compound_type. If not set, specifies that the syntax
+        element compound_type will not be present.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_WARPED_MOTION``
+      - 0x00000040
+      - If set, indicates that the allow_warped_motion syntax element may be
+        present. If not set, indicates that the allow_warped_motion syntax
+        element will not be present.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_DUAL_FILTER``
+      - 0x00000080
+      - If set, indicates that the inter prediction filter type may be specified
+        independently in the horizontal and vertical directions. If the flag is
+        equal to 0, only one filter type may be specified, which is then used in
+        both directions.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_ORDER_HINT``
+      - 0x00000100
+      - If set, indicates that tools based on the values of order hints may be
+        used. If not set, indicates that tools based on order hints are
+        disabled.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_JNT_COMP``
+      - 0x00000200
+      - If set, indicates that the distance weights process may be used for
+        inter prediction.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_REF_FRAME_MVS``
+      - 0x00000400
+      - If set, indicates that the use_ref_frame_mvs syntax element may be
+        present. If not set, indicates that the use_ref_frame_mvs syntax element
+        will not be present.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_SUPERRES``
+      - 0x00000800
+      - If set, specifies that the use_superres syntax element will be present
+        in the uncompressed header. If not set, specifies that the use_superres
+        syntax element will not be present (instead use_superres will be set to
+        0 in the uncompressed header without being read).
+    * - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_CDEF``
+      - 0x00001000
+      - If set, specifies that cdef filtering may be enabled. If not set,
+        specifies that cdef filtering is disabled.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_ENABLE_RESTORATION``
+      - 0x00002000
+      - If set, specifies that loop restoration filtering may be enabled. If not
+        set, specifies that loop restoration filtering is disabled.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_MONO_CHROME``
+      - 0x00004000
+      - If set, indicates that the video does not contain U and V color planes.
+        If not set, indicates that the video contains Y, U, and V color planes.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_COLOR_RANGE``
+      - 0x00008000
+      - If set, signals full swing representation, i.e. "Full Range
+        Quantization". If not set, signals studio swing representation, i.e.
+        "Limited Range Quantization".
+    * - ``V4L2_AV1_SEQUENCE_FLAG_SUBSAMPLING_X``
+      - 0x00010000
+      - Specify the chroma subsampling format.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_SUBSAMPLING_Y``
+      - 0x00020000
+      - Specify the chroma subsampling format.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_FILM_GRAIN_PARAMS_PRESENT``
+      - 0x00040000
+      - Specifies whether film grain parameters are present in the coded video
+        sequence.
+    * - ``V4L2_AV1_SEQUENCE_FLAG_SEPARATE_UV_DELTA_Q``
+      - 0x00080000
+      - If set, indicates that the U and V planes may have separate delta
+        quantizer values. If not set, indicates that the U and V planes will share
+        the same delta quantizer value.
+
+``V4L2_CID_STATELESS_AV1_TILE_GROUP_ENTRY (struct)``
+    Represents a single AV1 tile inside an AV1 Tile Group. Note that MiRowStart,
+    MiRowEnd, MiColStart and MiColEnd can be retrieved from struct
+    v4l2_av1_tile_info in struct v4l2_ctrl_av1_frame using tile_row and
+    tile_col. See section 6.10.1 "General tile group OBU semantics" in
+    :ref:`av1` for more details.
+
+.. c:type:: v4l2_ctrl_av1_tile_group_entry
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{5.8cm}|p{4.8cm}|p{6.6cm}|
+
+.. flat-table:: struct v4l2_ctrl_av1_tile_group_entry
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``tile_offset``
+      - Offset from the OBU data, i.e. where the coded tile data actually starts.
+    * - __u32
+      - ``tile_size``
+      - Specifies the size in bytes of the coded tile. Equivalent to "TileSize"
+        in :ref:`av1`.
+    * - __u32
+      - ``tile_row``
+      - Specifies the row of the current tile. Equivalent to "TileRow" in
+        :ref:`av1`.
+    * - __u32
+      - ``tile_col``
+      - Specifies the column of the current tile. Equivalent to "TileColumn" in
+        :ref:`av1`.
+
+.. c:type:: v4l2_av1_warp_model
+
+	AV1 Warp Model as described in section 3 "Symbols and abbreviated terms" of
+	:ref:`av1`.
+
+.. raw:: latex
+
+    \scriptsize
+
+.. tabularcolumns:: |p{7.4cm}|p{0.3cm}|p{9.6cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_AV1_WARP_MODEL_IDENTITY``
+      - 0
+      - Warp model is just an identity transform.
+    * - ``V4L2_AV1_WARP_MODEL_TRANSLATION``
+      - 1
+      - Warp model is a pure translation.
+    * - ``V4L2_AV1_WARP_MODEL_ROTZOOM``
+      - 2
+      - Warp model is a rotation + symmetric zoom + translation.
+    * - ``V4L2_AV1_WARP_MODEL_AFFINE``
+      - 3
+      - Warp model is a general affine transform.
+
+.. c:type:: v4l2_av1_reference_frame
+
+AV1 Reference Frames as described in section 6.10.24 "Ref frames semantics"
+of :ref:`av1`.
+
+.. raw:: latex
+
+    \scriptsize
+
+.. tabularcolumns:: |p{7.4cm}|p{0.3cm}|p{9.6cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_AV1_REF_INTRA_FRAME``
+      - 0
+      - Intra Frame Reference.
+    * - ``V4L2_AV1_REF_LAST_FRAME``
+      - 1
+      - Last Frame Reference.
+    * - ``V4L2_AV1_REF_LAST2_FRAME``
+      - 2
+      - Last2 Frame Reference.
+    * - ``V4L2_AV1_REF_LAST3_FRAME``
+      - 3
+      - Last3 Frame Reference.
+    * - ``V4L2_AV1_REF_GOLDEN_FRAME``
+      - 4
+      - Golden Frame Reference.
+    * - ``V4L2_AV1_REF_BWDREF_FRAME``
+      - 5
+      - BWD Frame Reference.
+    * - ``V4L2_AV1_REF_ALTREF2_FRAME``
+      - 6
+      - ALTREF2 Frame Reference.
+    * - ``V4L2_AV1_REF_ALTREF_FRAME``
+      - 7
+      - ALTREF Frame Reference.
+
+.. c:type:: v4l2_av1_global_motion
+
+AV1 Global Motion parameters as described in section 6.8.17
+"Global motion params semantics" of :ref:`av1`.
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}|
+
+.. flat-table:: struct v4l2_av1_global_motion
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``flags[V4L2_AV1_TOTAL_REFS_PER_FRAME]``
+      - A bitfield containing the flags per reference frame. See
+        :ref:`AV1 Global Motion Flags <av1_global_motion_flags>` for more
+        details.
+    * - enum :c:type:`v4l2_av1_warp_model`
+      - ``type[V4L2_AV1_TOTAL_REFS_PER_FRAME]``
+      - The type of global motion transform used.
+    * - __s32
+      - ``params[V4L2_AV1_TOTAL_REFS_PER_FRAME][6]``
+      - This field has the same meaning as "gm_params" in :ref:`av1`.
+    * - __u8
+      - ``invalid``
+      - Bitfield indicating whether the global motion params are invalid for a
+        given reference frame. See section 7.11.3.6 Setup shear process and the
+        variable "warpValid". Use V4L2_AV1_GLOBAL_MOTION_IS_INVALID(ref) to
+        create a suitable mask.
+    * - __u8
+      - ``reserved[3]``
+      - Applications and drivers must set this to zero.
+
+.. _av1_global_motion_flags:
+
+``AV1 Global Motion Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_AV1_GLOBAL_MOTION_FLAG_IS_GLOBAL``
+      - 0x00000001
+      - Specifies whether global motion parameters are present for a particular
+        reference frame.
+    * - ``V4L2_AV1_GLOBAL_MOTION_FLAG_IS_ROT_ZOOM``
+      - 0x00000002
+      - Specifies whether a particular reference frame uses rotation and zoom
+        global motion.
+    * - ``V4L2_AV1_GLOBAL_MOTION_FLAG_IS_TRANSLATION``
+      - 0x00000004
+      - Specifies whether a particular reference frame uses translation global
+        motion
+
+.. c:type:: v4l2_av1_frame_restoration_type
+
+AV1 Frame Restoration Type.
+
+.. raw:: latex
+
+    \scriptsize
+
+.. tabularcolumns:: |p{7.4cm}|p{0.3cm}|p{9.6cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_AV1_FRAME_RESTORE_NONE``
+      - 0
+      - No filtering is applied.
+    * - ``V4L2_AV1_FRAME_RESTORE_WIENER``
+      - 1
+      - Wiener filter process is invoked.
+    * - ``V4L2_AV1_FRAME_RESTORE_SGRPROJ``
+      - 2
+      - Self guided filter process is invoked.
+    * - ``V4L2_AV1_FRAME_RESTORE_SWITCHABLE``
+      - 3
+      - Restoration filter is swichtable.
+
+.. c:type:: v4l2_av1_loop_restoration
+
+AV1 Loop Restauration as described in section 6.10.15 "Loop restoration params
+semantics" of :ref:`av1`.
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}|
+
+.. flat-table:: struct v4l2_av1_loop_restoration
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``flags``
+      - See :ref:`AV1 Loop Restoration Flags <av1_loop_restoration_flags>`.
+    * - __u8
+      - ``lr_unit_shift``
+      - Specifies if the luma restoration size should be halved.
+    * - __u8
+      - ``lr_uv_shift``
+      - Specifies if the chroma size should be half the luma size.
+    * - __u8
+      - ``reserved``
+      - Applications and drivers must set this to zero.
+    * - :c:type:`v4l2_av1_frame_restoration_type`
+      - ``frame_restoration_type[V4L2_AV1_NUM_PLANES_MAX]``
+      - Specifies the type of restoration used for each plane.
+    * - __u8
+      - ``loop_restoration_size[V4L2_AV1_MAX_NUM_PLANES]``
+      - Specifies the size of loop restoration units in units of samples in the
+        current plane.
+
+.. _av1_loop_restoration_flags:
+
+``AV1 Loop Restoration Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_AV1_LOOP_RESTORATION_FLAG_USES_LR``
+      - 0x00000001
+      - Retains the same meaning as UsesLr in :ref:`av1`.
+    * - ``V4L2_AV1_LOOP_RESTORATION_FLAG_USES_CHROMA_LR``
+      - 0x00000002
+      - Retains the same meaning as UsesChromaLr in :ref:`av1`.
+
+.. c:type:: v4l2_av1_cdef
+
+AV1 CDEF params semantics as described in section 6.10.14 "CDEF params
+semantics" of :ref:`av1`.
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}|
+
+.. flat-table:: struct v4l2_av1_cdef
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``damping_minus_3``
+      - Controls the amount of damping in the deringing filter.
+    * - __u8
+      - ``bits``
+      - Specifies the number of bits needed to specify which CDEF filter to
+        apply.
+    * - __u8
+      - ``y_pri_strength[V4L2_AV1_CDEF_MAX]``
+      -  Specifies the strength of the primary filter.
+    * - __u8
+      - ``y_sec_strength[V4L2_AV1_CDEF_MAX]``
+      -  Specifies the strength of the secondary filter.
+    * - __u8
+      - ``uv_pri_strength[V4L2_AV1_CDEF_MAX]``
+      -  Specifies the strength of the primary filter.
+    * - __u8
+      - ``uv_secondary_strength[V4L2_AV1_CDEF_MAX]``
+      -  Specifies the strength of the secondary filter.
+
+.. c:type:: v4l2_av1_segment_feature
+
+AV1 segment features as described in section 3 "Symbols and abbreviated terms"
+of :ref:`av1`.
+
+.. raw:: latex
+
+    \scriptsize
+
+.. tabularcolumns:: |p{7.4cm}|p{0.3cm}|p{9.6cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_AV1_SEG_LVL_ALT_Q``
+      - 0
+      - Index for quantizer segment feature.
+    * - ``V4L2_AV1_SEG_LVL_ALT_LF_Y_V``
+      - 1
+      - Index for vertical luma loop filter segment feature.
+    * - ``V4L2_AV1_SEG_LVL_REF_FRAME``
+      - 5
+      - Index for reference frame segment feature.
+    * - ``V4L2_AV1_SEG_LVL_REF_SKIP``
+      - 6
+      - Index for skip segment feature.
+    * - ``V4L2_AV1_SEG_LVL_REF_GLOBALMV``
+      - 7
+      - Index for global mv feature.
+    * - ``V4L2_AV1_SEG_LVL_MAX``
+      - 8
+      - Number of segment features.
+
+.. c:type:: v4l2_av1_segmentation
+
+AV1 Segmentation params as defined in section 6.8.13 "Segmentation params
+semantics" of :ref:`av1`.
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}|
+
+.. flat-table:: struct v4l2_av1_segmentation
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``flags``
+      - See :ref:`AV1 Segmentation Flags <av1_segmentation_flags>`
+    * - __u8
+      - ``last_active_seg_id``
+      -  Indicates the highest numbered segment id that has some
+         enabled feature. This is used when decoding the segment id to only decode
+         choices corresponding to used segments.
+    * - __u8
+      - ``feature_enabled[V4L2_AV1_MAX_SEGMENTS]``
+      - Bitmask defining which features are enabled in each segment. Use
+        V4L2_AV1_SEGMENT_FEATURE_ENABLED to build a suitable mask.
+    * - __u16
+      - `feature_data[V4L2_AV1_MAX_SEGMENTS][V4L2_AV1_SEG_LVL_MAX]``
+      -  Data attached to each feature. Data entry is only valid if the feature
+         is enabled.
+
+.. _av1_segmentation_flags:
+
+``AV1 Segmentation Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_AV1_SEGMENTATION_FLAG_ENABLED``
+      - 0x00000001
+      - If set, indicates that this frame makes use of the segmentation tool. If
+        not set, indicates that the frame does not use segmentation.
+    * - ``V4L2_AV1_SEGMENTATION_FLAG_UPDATE_MAP``
+      - 0x00000002
+      - If set, indicates that the segmentation map are updated during the
+        decoding of this frame. If not set, indicates that the segmentation map
+        from the previous frame is used.
+    * - ``V4L2_AV1_SEGMENTATION_FLAG_TEMPORAL_UPDATE``
+      - 0x00000004
+      - If set, indicates that the updates to the segmentation map are coded
+        relative to the existing segmentation map. If not set, indicates that
+        the new segmentation map is coded without reference to the existing
+        segmentation map.
+    * - ``V4L2_AV1_SEGMENTATION_FLAG_UPDATE_DATA``
+      - 0x00000008
+      - If set, indicates that the updates to the segmentation map are coded
+        relative to the existing segmentation map. If not set, indicates that
+        the new segmentation map is coded without reference to the existing
+        segmentation map.
+    * - ``V4L2_AV1_SEGMENTATION_FLAG_SEG_ID_PRE_SKIP``
+      - 0x00000010
+      - If set, indicates that the segment id will be read before the skip
+        syntax element. If not set, indicates that the skip syntax element will
+        be read first.
+
+.. c:type:: v4l2_av1_loop_filter
+
+AV1 Loop filter params as defined in section 6.8.10 "Loop filter semantics" of
+:ref:`av1`.
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}|
+
+.. flat-table:: struct v4l2_av1_global_motion
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``flags``
+      - See
+        :ref:`AV1 Loop Filter flags <av1_loop_filter_flags>` for more details.
+    * - __u8
+      - ``level[4]``
+      - An array containing loop filter strength values. Different loop
+        filter strength values from the array are used depending on the image
+        plane being filtered, and the edge direction (vertical or horizontal)
+        being filtered.
+    * - __u8
+      - ``sharpness``
+      - indicates the sharpness level. The loop_filter_level and
+        loop_filter_sharpness together determine when a block edge is filtered,
+        and by how much the filtering can change the sample values. The loop
+        filter process is described in section 7.14 of :ref:`av1`.
+    * - __u8
+      - ``ref_deltas[V4L2_AV1_TOTAL_REFS_PER_FRAME]``
+      - contains the adjustment needed for the filter level based on the
+        chosen reference frame. If this syntax element is not present, it
+        maintains its previous value.
+    * - __u8
+      - ``mode_deltas[2]``
+      - contains the adjustment needed for the filter level based on
+        the chosen mode. If this syntax element is not present, it maintains its
+        previous value.
+    * - __u8
+      - ``delta_lf_res``
+      - specifies the left shift which should be applied to decoded loop filter
+        delta values.
+
+.. _av1_loop_filter_flags:
+
+``AV1 Loop Filter Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_AV1_LOOP_FILTER_FLAG_DELTA_ENABLED``
+      - 0x00000001
+      - If set, means that the filter level depends on the mode and reference
+        frame used to predict a block. If not set, means that the filter level
+        does not depend on the mode and reference frame.
+    * - ``V4L2_AV1_LOOP_FILTER_FLAG_DELTA_UPDATE``
+      - 0x00000002
+      - If set, means that additional syntax elements are present that specify
+        which mode and reference frame deltas are to be updated. If not set,
+        means that these syntax elements are not present.
+    * - ``V4L2_AV1_LOOP_FILTER_FLAG_DELTA_LF_PRESENT``
+      - 0x00000004
+      - Specifies whether loop filter delta values are present
+    * - ``V4L2_AV1_LOOP_FILTER_FLAG_DELTA_LF_MULTI``
+      - 0x00000008
+      - A value equal to 1 specifies that separate loop filter
+        deltas are sent for horizontal luma edges, vertical luma edges,
+        the U edges, and the V edges. A value of delta_lf_multi equal to 0
+        specifies that the same loop filter delta is used for all edges.
+
+.. c:type:: v4l2_av1_quantization
+
+AV1 Quantization params as defined in section 6.8.11 "Quantization params
+semantics" of :ref:`av1`.
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}|
+
+.. flat-table:: struct v4l2_av1_quantization
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``flags``
+      - See
+        :ref:`AV1 Loop Filter flags <av1_quantization_flags>` for more details.
+    * - __u8
+      - ``base_q_idx``
+      - Indicates the base frame qindex. This is used for Y AC coefficients and
+        as the base value for the other quantizers.
+    * - __u8
+      - ``delta_q_y_dc``
+      - Indicates the Y DC quantizer relative to base_q_idx.
+    * - __u8
+      - ``delta_q_u_dc``
+      - Indicates the U DC quantizer relative to base_q_idx.
+    * - __u8
+      - ``delta_q_u_ac``
+      - Indicates the U AC quantizer relative to base_q_idx.
+    * - __u8
+      - ``delta_q_v_dc``
+      - Indicates the V DC quantizer relative to base_q_idx.
+    * - __u8
+      - ``delta_q_v_ac``
+      - Indicates the V AC quantizer relative to base_q_idx.
+    * - __u8
+      - ``qm_y``
+      - Specifies the level in the quantizer matrix that should be used for
+        luma plane decoding.
+    * - __u8
+      - ``qm_u``
+      - Specifies the level in the quantizer matrix that should be used for
+        chroma U plane decoding.
+    * - __u8
+      - ``qm_v``
+      - Specifies the level in the quantizer matrix that should be used for
+        chroma V plane decoding.
+    * - __u8
+      - ``delta_q_res``
+      - Specifies the left shift which should be applied to decoded quantizer
+        index delta values.
+
+.. _av1_quantization_flags:
+
+``AV1 Quantization Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_AV1_QUANTIZATION_FLAG_DIFF_UV_DELTA``
+      - 0x00000001
+      - If set, indicates that the U and V delta quantizer values are coded
+        separately. If not set, indicates that the U and V delta quantizer
+        values share a common value.
+    * - ``V4L2_AV1_QUANTIZATION_FLAG_USING_QMATRIX``
+      - 0x00000002
+      - If set, specifies that the quantizer matrix will be used to compute
+        quantizers.
+    * - ``V4L2_AV1_QUANTIZATION_FLAG_DELTA_Q_PRESENT``
+      - 0x00000004
+      - Specifies whether quantizer index delta values are present.
+
+.. c:type:: v4l2_av1_tile_info
+
+AV1 Tile info as defined in section 6.8.14 "Tile info semantics" of ref:`av1`.
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}|
+
+.. flat-table:: struct v4l2_av1_tile_info
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``flags``
+      - See
+        :ref:`AV1 Tile Info flags <av1_tile_info_flags>` for more details.
+    * - __u8
+      - ``context_update_tile_id``
+      - Specifies which tile to use for the CDF update.
+    * - __u8
+      - ``tile_cols``
+      - Specifies the number of tiles across the frame.
+    * - __u8
+      - ``tile_rows``
+      - Specifies the number of tiles down the frame.
+    * - __u32
+      - ``mi_col_starts[V4L2_AV1_MAX_TILE_COLS + 1]``
+      - An array specifying the start column (in units of 4x4 luma
+        samples) for each tile across the image.
+    * - __u32
+      - ``mi_row_starts[V4L2_AV1_MAX_TILE_ROWS + 1]``
+      - An array specifying the start row (in units of 4x4 luma
+        samples) for each tile across the image.
+    * - __u32
+      - ``width_in_sbs_minus_1[V4L2_AV1_MAX_TILE_COLS]``
+      - Specifies the width of a tile minus 1 in units of superblocks.
+    * - __u32
+      - ``height_in_sbs_minus_1[V4L2_AV1_MAX_TILE_ROWS]``
+      - Specifies the height of a tile minus 1 in units of superblocks.
+    * - __u8
+      - ``tile_size_bytes``
+      - Specifies the number of bytes needed to code each tile size.
+    * - __u8
+      - ``reserved[3]``
+      - Applications and drivers must set this to zero.
+
+.. _av1_tile_info_flags:
+
+``AV1 Tile Info Flags``
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_AV1_TILE_INFO_FLAG_UNIFORM_TILE_SPACING``
+      - 0x00000001
+      - If set, means that the tiles are uniformly spaced across the frame. (In
+        other words, all tiles are the same size except for the ones at the
+        right and bottom edge which can be smaller). If not set means that the
+        tile sizes are coded.
+
+.. c:type:: v4l2_av1_frame_type
+
+AV1 Frame Type
+
+.. raw:: latex
+
+    \scriptsize
+
+.. tabularcolumns:: |p{7.4cm}|p{0.3cm}|p{9.6cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_AV1_KEY_FRAME``
+      - 0
+      - Key frame.
+    * - ``V4L2_AV1_INTER_FRAME``
+      - 1
+      - Inter frame.
+    * - ``V4L2_AV1_INTRA_ONLY_FRAME``
+      - 2
+      - Intra-only frame.
+    * - ``V4L2_AV1_SWITCH_FRAME``
+      - 3
+      - Switch frame.
+
+.. c:type:: v4l2_av1_interpolation_filter
+
+AV1 Interpolation Filter
+
+.. raw:: latex
+
+    \scriptsize
+
+.. tabularcolumns:: |p{7.4cm}|p{0.3cm}|p{9.6cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_AV1_INTERPOLATION_FILTER_EIGHTTAP``
+      - 0
+      - Eight tap filter.
+    * - ``V4L2_AV1_INTERPOLATION_FILTER_EIGHTTAP_SMOOTH``
+      - 1
+      - Eight tap smooth filter.
+    * - ``V4L2_AV1_INTERPOLATION_FILTER_EIGHTTAP_SHARP``
+      - 2
+      - Eight tap sharp filter.
+    * - ``V4L2_AV1_INTERPOLATION_FILTER_BILINEAR``
+      - 3
+      - Bilinear filter.
+    * - ``V4L2_AV1_INTERPOLATION_FILTER_SWITCHABLE``
+      - 4
+      - Filter selection is signaled at the block level.
+
+.. c:type:: v4l2_av1_tx_mode
+
+AV1 Tx mode as described in section 6.8.21 "TX mode semantics" of :ref:`av1`.
+
+.. raw:: latex
+
+    \scriptsize
+
+.. tabularcolumns:: |p{7.4cm}|p{0.3cm}|p{9.6cm}|
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_AV1_TX_MODE_ONLY_4X4``
+      - 0
+      -  The inverse transform will use only 4x4 transforms.
+    * - ``V4L2_AV1_TX_MODE_LARGEST``
+      - 1
+      - The inverse transform will use the largest transform size that fits
+        inside the block.
+    * - ``V4L2_AV1_TX_MODE_SELECT``
+      - 2
+      - The choice of transform size is specified explicitly for each block.
+
+``V4L2_CID_STATELESS_AV1_FRAME (struct)``
+    Represents a Frame Header OBU. See 6.8 "Frame Header OBU semantics" of
+    :ref:`av1` for more details.
+
+.. c:type:: v4l2_ctrl_av1_frame
+
+.. cssclass:: longtable
+
+.. tabularcolumns:: |p{5.8cm}|p{4.8cm}|p{6.6cm}|
+
+.. flat-table:: struct v4l2_ctrl_av1_frame
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - struct :c:type:`v4l2_av1_tile_info`
+      - ``tile_info``
+      - Tile info
+    * - struct :c:type:`v4l2_av1_quantization`
+      - ``quantization``
+      - Quantization parameters.
+    * - struct :c:type:`v4l2_av1_segmentation`
+      - ``segmentation``
+      - Segmentation parameters.
+    * - __u8
+      - ``superres_denom``
+      - The denominator for the upscaling ratio.
+    * - struct :c:type:`v4l2_av1_loop_filter`
+      - ``loop_filter``
+      - Loop filter params
+    * - struct :c:type:`v4l2_av1_cdef`
+      - ``cdef``
+      - CDEF params
+    * - __u8
+      - ``skip_mode_frame[2]``
+      - Specifies the frames to use for compound prediction when skip_mode is
+        equal to 1.
+    * - __u8
+      - ``primary_ref_frame``
+      - Specifies which reference frame contains the CDF values and other state
+        that should be loaded at the start of the frame.
+    * - struct :c:type:`v4l2_av1_loop_restoration`
+      - ``loop_restoration``
+      - Loop restoration parameters.
+    * - struct :c:type:`v4l2_av1_loop_global_motion`
+      - ``global_motion``
+      - Global motion parameters.
+    * - __u32
+      - ``flags``
+      - See
+        :ref:`AV1 Frame flags <av1_frame_flags>` for more details.
+    * - enum :c:type:`v4l2_av1_frame_type`
+      - ``frame_type``
+      - Specifies the AV1 frame type
+    * - __u32
+      - ``order_hint``
+      - Specifies OrderHintBits least significant bits of the expected output
+        order for this frame.
+    * - __u32
+      - ``upscaled_width``
+      - The upscaled width.
+    * - enum :c:type:`v4l2_av1_interpolation_filter`
+      - ``interpolation_filter``
+      - Specifies the filter selection used for performing inter prediction.
+    * - enum :c:type:`v4l2_av1_tx_mode`
+      - ``tx_mode``
+      - Specifies how the transform size is determined.
+    * - __u32
+      - ``frame_width_minus_1``
+      - Add 1 to get the frame's width.
+    * - __u32
+      - ``frame_height_minus_1``
+      - Add 1 to get the frame's height.