Re: [PATCH v3 05/10] media: uapi: Add VP9 stateless decoder controls

Nicolas Dufresne
2021-08-17T17:50:26Z

Le jeudi 05 août 2021 à 16:42 +0200, Andrzej Pietrasiewicz a écrit :
> Add the VP9 stateless decoder controls plus the documentation that goes
> with it.
>
> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
> Co-developed-by: Ezequiel Garcia <ezequiel@collabora.com>
> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
> Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com>
> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
> Co-developed-by: Daniel Almeida <daniel.almeida@collabora.com>
> Signed-off-by: Daniel Almeida <daniel.almeida@collabora.com>
> ---
> .../userspace-api/media/v4l/biblio.rst | 10 +
> .../media/v4l/ext-ctrls-codec-stateless.rst | 545 ++++++++++++++++++
> .../media/v4l/pixfmt-compressed.rst | 15 +
> .../media/v4l/vidioc-g-ext-ctrls.rst | 8 +
> .../media/v4l/vidioc-queryctrl.rst | 12 +
> .../media/videodev2.h.rst.exceptions | 2 +
> drivers/media/v4l2-core/v4l2-ctrls-core.c | 174 ++++++
> drivers/media/v4l2-core/v4l2-ctrls-defs.c | 8 +
> drivers/media/v4l2-core/v4l2-ioctl.c | 1 +
> include/media/v4l2-ctrls.h | 4 +
> include/uapi/linux/v4l2-controls.h | 433 ++++++++++++++
> include/uapi/linux/videodev2.h | 6 +
> 12 files changed, 1218 insertions(+)
>
> diff --git a/Documentation/userspace-api/media/v4l/biblio.rst b/Documentation/userspace-api/media/v4l/biblio.rst
> index 7b8e6738ff9e..9cd18c153d19 100644
> --- a/Documentation/userspace-api/media/v4l/biblio.rst
> +++ b/Documentation/userspace-api/media/v4l/biblio.rst
> @@ -417,3 +417,13 @@ VP8
> :title: RFC 6386: "VP8 Data Format and Decoding Guide"
>
> :author: J. Bankoski et al.
> +
> +.. _vp9:
> +
> +VP9
> +===
> +
> +
> +:title: VP9 Bitstream & Decoding Process Specification
> +
> +:author: Adrian Grange (Google), Peter de Rivaz (Argon Design), Jonathan Hunt (Argon Design)
> 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 72f5e85b4f34..af06d46e5993 100644
> --- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec-stateless.rst
> +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec-stateless.rst
> @@ -1458,3 +1458,548 @@ FWHT Flags
> .. raw:: latex
>
> \normalsize
> +
> +.. _v4l2-codec-stateless-vp9:
> +
> +``V4L2_CID_STATELESS_VP9_COMPRESSED_HDR_PROBS (struct)``
> + Stores VP9 probabilities updates as parsed from the current compressed frame
> + header. A value of zero in an array element means no update of the relevant
> + probability. Motion vector-related updates contain a new value or zero. All
> + other updates contain values translated with inv_map_table[] (see 6.3.5 in
> + :ref:`vp9`).

As we discuss, widewine and other crypto may encrypt the compressed headers, so
passing this information is not always possible from userspace. Newer VP9
decoders (notably newer Rockchip decoder) are being being extended with full HW
support for compressed header handling including probability updates. Regardless
if we like drm or not, we should at least make sure the spec allow to optimize
and skip this control.

Documenting this will reassure driver writers that don't need it and will let
userspace devs know that they should check the control presence and can then
skip the associate entropy decoding if not needed.

> +
> +.. c:type:: v4l2_ctrl_vp9_compressed_hdr_probs
> +
> +.. cssclass:: longtable
> +
> +.. tabularcolumns:: |p{5.8cm}|p{4.8cm}|p{6.6cm}|
> +
> +.. flat-table:: struct v4l2_ctrl_vp9_compressed_hdr_probs
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - __u8
> + - ``tx8[2][1]``
> + - TX 8x8 probabilities delta.
> + * - __u8
> + - ``tx16[2][2]``
> + - TX 16x16 probabilities delta.
> + * - __u8
> + - ``tx32[2][3]``
> + - TX 32x32 probabilities delta.
> + * - __u8
> + - ``coef[4][2][2][6][6][3]``
> + - Coefficient probabilities delta.
> + * - __u8
> + - ``skip[3]``
> + - Skip probabilities delta.
> + * - __u8
> + - ``inter_mode[7][3]``
> + - Inter prediction mode probabilities delta.
> + * - __u8
> + - ``interp_filter[4][2]``
> + - Interpolation filter probabilities delta.
> + * - __u8
> + - ``is_inter[4]``
> + - Is inter-block probabilities delta.
> + * - __u8
> + - ``comp_mode[5]``
> + - Compound prediction mode probabilities delta.
> + * - __u8
> + - ``single_ref[5][2]``
> + - Single reference probabilities delta.
> + * - __u8
> + - ``comp_ref[5]``
> + - Compound reference probabilities delta.
> + * - __u8
> + - ``y_mode[4][9]``
> + - Y prediction mode probabilities delta.
> + * - __u8
> + - ``uv_mode[10][9]``
> + - UV prediction mode probabilities delta.
> + * - __u8
> + - ``partition[16][3]``
> + - Partition probabilities delta.
> + * - __u8
> + - ``mv.joint[3]``
> + - Motion vector joint probabilities delta.
> + * - __u8
> + - ``mv.sign[2]``
> + - Motion vector sign probabilities delta.
> + * - __u8
> + - ``mv.classes[2][10]``
> + - Motion vector class probabilities delta.
> + * - __u8
> + - ``mv.class0_bit[2]``
> + - Motion vector class0 bit probabilities delta.
> + * - __u8
> + - ``mv.bits[2][10]``
> + - Motion vector bits probabilities delta.
> + * - __u8
> + - ``mv.class0_fr[2][2][3]``
> + - Motion vector class0 fractional bit probabilities delta.
> + * - __u8
> + - ``mv.fr[2][3]``
> + - Motion vector fractional bit probabilities delta.
> + * - __u8
> + - ``mv.class0_hp[2]``
> + - Motion vector class0 high precision fractional bit probabilities delta.
> + * - __u8
> + - ``mv.hp[2]``
> + - Motion vector high precision fractional bit probabilities delta.
> +
> +``V4L2_CID_STATELESS_VP9_FRAME (struct)``
> + Specifies the frame parameters for the associated VP9 frame decode request.
> + This includes the necessary parameters for configuring a stateless hardware
> + decoding pipeline for VP9. The bitstream parameters are defined according
> + to :ref:`vp9`.
> +
> +.. c:type:: v4l2_ctrl_vp9_frame
> +
> +.. cssclass:: longtable
> +
> +.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
> +
> +.. flat-table:: struct v4l2_ctrl_vp9_frame
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - struct :c:type:`v4l2_vp9_loop_filter`
> + - ``lf``
> + - Loop filter parameters. See struct :c:type:`v4l2_vp9_loop_filter` for more details.
> + * - struct :c:type:`v4l2_vp9_quantization`
> + - ``quant``
> + - Quantization parameters. See :c:type:`v4l2_vp9_quantization` for more details.
> + * - struct :c:type:`v4l2_vp9_segmentation`
> + - ``seg``
> + - Segmentation parameters. See :c:type:`v4l2_vp9_segmentation` for more details.
> + * - __u32
> + - ``flags``
> + - Combination of V4L2_VP9_FRAME_FLAG_* flags. See :c:type:`v4l2_vp9_frame_flags`.
> + * - __u16
> + - ``compressed_header_size``
> + - Compressed header size in bytes.
> + * - __u16
> + - ``uncompressed_header_size``
> + - Uncompressed header size in bytes.
> + * - __u16
> + - ``frame_width_minus_1``
> + - Add 1 to get the frame width expressed in pixels. See section 7.2.3 in :ref:`vp9`.
> + * - __u16
> + - ``frame_height_minus_1``
> + - Add 1 to get the frame height expressed in pixels. See section 7.2.3 in :ref:`vp9`.
> + * - __u16
> + - ``render_width_minus_1``
> + - Add 1 to get the expected render width expressed in pixels. This is
> + not used during the decoding process but might be used by HW scalers to
> + prepare a frame that's ready for scanout. See section 7.2.4 in :ref:`vp9`.
> + * - __u16
> + - render_height_minus_1
> + - Add 1 to get the expected render height expressed in pixels. This is
> + not used during the decoding process but might be used by HW scalers to
> + prepare a frame that's ready for scanout. See section 7.2.4 in :ref:`vp9`.
> + * - __u64
> + - ``last_frame_ts``
> + - "last" reference buffer timestamp.
> + The timestamp refers to the ``timestamp`` field in
> + struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
> + function to convert the struct :c:type:`timeval` in struct
> + :c:type:`v4l2_buffer` to a __u64.
> + * - __u64
> + - ``golden_frame_ts``
> + - "golden" reference buffer timestamp.
> + The timestamp refers to the ``timestamp`` field in
> + struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
> + function to convert the struct :c:type:`timeval` in struct
> + :c:type:`v4l2_buffer` to a __u64.
> + * - __u64
> + - ``alt_frame_ts``
> + - "alt" reference buffer timestamp.
> + The timestamp refers to the ``timestamp`` field in
> + struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
> + function to convert the struct :c:type:`timeval` in struct
> + :c:type:`v4l2_buffer` to a __u64.
> + * - __u8
> + - ``ref_frame_sign_bias``
> + - a bitfield specifying whether the sign bias is set for a given
> + reference frame. See :c:type:`v4l2_vp9_ref_frame_sign_bias` for more details.
> + * - __u8
> + - ``reset_frame_context``
> + - specifies whether the frame context should be reset to default values. See
> + :c:type:`v4l2_vp9_reset_frame_context` for more details.
> + * - __u8
> + - ``frame_context_idx``
> + - Frame context that should be used/updated.
> + * - __u8
> + - ``profile``
> + - VP9 profile. Can be 0, 1, 2 or 3.
> + * - __u8
> + - ``bit_depth``
> + - Component depth in bits. Can be 8, 10 or 12. Note that not all profiles
> + support 10 and/or 12 bits depths.
> + * - __u8
> + - ``interpolation_filter``
> + - Specifies the filter selection used for performing inter prediction. See
> + :c:type:`v4l2_vp9_interpolation_filter` for more details.
> + * - __u8
> + - ``tile_cols_log2``
> + - Specifies the base 2 logarithm of the width of each tile (where the
> + width is measured in units of 8x8 blocks). Shall be less than or equal
> + to 6.
> + * - __u8
> + - ``tile_rows_log2``
> + - Specifies the base 2 logarithm of the height of each tile (where the
> + height is measured in units of 8x8 blocks).
> + * - __u8
> + - ``tx_mode``
> + - Specifies the TX mode. See :c:type:`v4l2_vp9_tx_mode` for more details.
> + * - __u8
> + - ``reference_mode``
> + - Specifies the type of inter prediction to be used. See
> + :c:type:`v4l2_vp9_reference_mode` for more details.
> + * - __u8
> + - ``reserved[6]``
> + - Applications and drivers must set this to zero.
> +
> +.. c:type:: v4l2_vp9_frame_flags
> +
> +.. cssclass:: longtable
> +
> +.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
> +
> +.. flat-table:: enum v4l2_vp9_frame_flags
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 2
> +
> + * - ``V4L2_VP9_FRAME_FLAG_KEY_FRAME``
> + - The frame is a key frame.
> + * - ``V4L2_VP9_FRAME_FLAG_SHOW_FRAME``
> + - The frame should be displayed.
> + * - ``V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT``
> + - The decoding should be error resilient.
> + * - ``V4L2_VP9_FRAME_FLAG_INTRA_ONLY``
> + - The frame does not reference other frames.
> + * - ``V4L2_VP9_FRAME_FLAG_ALLOW_HIGH_PREC_MV``
> + - The frame can use high precision motion vectors.
> + * - ``V4L2_VP9_FRAME_FLAG_REFRESH_FRAME_CTX``
> + - Frame context should be updated after decoding.
> + * - ``V4L2_VP9_FRAME_FLAG_PARALLEL_DEC_MODE``
> + - Parallel decoding is used.
> + * - ``V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING``
> + - Vertical subsampling is enabled.
> + * - ``V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING``
> + - Horizontal subsampling is enabled.
> + * - ``V4L2_VP9_FRAME_FLAG_COLOR_RANGE_FULL_SWING``
> + - The full UV range is used.
> +
> +.. c:type:: v4l2_vp9_tx_mode
> +
> +See section '7.3.1 Tx mode semantics' of the VP9 specification for more details.
> +
> +.. cssclass:: longtable
> +
> +.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
> +
> +.. flat-table:: enum v4l2_vp9_tx_mode
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 2
> +
> + * - ``V4L2_VP9_TX_MODE_ONLY_4X4``
> + - Transform size is 4x4.
> + * - ``V4L2_VP9_TX_MODE_ALLOW_8X8``
> + - Transform size can be up to 8x8.
> + * - ``V4L2_VP9_TX_MODE_ALLOW_16X16``
> + - Transform size can be up to 16x16.
> + * - ``V4L2_VP9_TX_MODE_ALLOW_32X32``
> + - transform size can be up to 32x32.
> + * - ``V4L2_VP9_TX_MODE_SELECT``
> + - Bitstream contains the transform size for each block.
> +
> +.. c:type:: v4l2_vp9_reference_mode
> +
> +See section '7.3.6 Frame reference mode semantics' of the VP9 specification for more details.
> +
> +.. cssclass:: longtable
> +
> +.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
> +
> +.. flat-table:: enum v4l2_vp9_reference_mode
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 2
> +
> + * - ``V4L2_VP9_REFERENCE_MODE_SINGLE_REFERENCE``
> + - Indicates that all the inter blocks use only a single reference frame
> + to generate motion compensated prediction.
> + * - ``V4L2_VP9_REFERENCE_MODE_COMPOUND_REFERENCE``
> + - Requires all the inter blocks to use compound mode. Single reference
> + frame prediction is not allowed.
> + * - ``V4L2_VP9_REFERENCE_MODE_SELECT``
> + - Allows each individual inter block to select between single and
> + compound prediction modes.
> +
> +.. c:type:: v4l2_vp9_interpolation_filter
> +
> +See section '7.2.7 Interpolation filter semantics' of the VP9 specification
> +for more details.
> +
> +.. cssclass:: longtable
> +
> +.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
> +
> +.. flat-table:: enum v4l2_vp9_interpolation_filter
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 2
> +
> + * - ``V4L2_VP9_INTERP_FILTER_EIGHTTAP``
> + - Eight tap filter.
> + * - ``V4L2_VP9_INTERP_FILTER_EIGHTTAP_SMOOTH``
> + - Eight tap smooth filter.
> + * - ``V4L2_VP9_INTERP_FILTER_EIGHTTAP_SHARP``
> + - Eeight tap sharp filter.
> + * - ``V4L2_VP9_INTERP_FILTER_BILINEAR``
> + - Bilinear filter.
> + * - ``V4L2_VP9_INTERP_FILTER_SWITCHABLE``
> + - Filter selection is signaled at the block level.
> +
> +.. c:type:: v4l2_vp9_reset_frame_context
> +
> +See section '7.2 Uncompressed header semantics' of the VP9 specification
> +for more details.
> +
> +.. cssclass:: longtable
> +
> +.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
> +
> +.. flat-table:: enum v4l2_vp9_reset_frame_context
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 2
> +
> + * - ``V4L2_VP9_RESET_FRAME_CTX_NONE``
> + - Do not reset any frame context.
> + * - ``V4L2_VP9_RESET_FRAME_CTX_SPEC``
> + - Reset the frame context pointed to by
> + :c:type:`v4l2_ctrl_vp9_frame`.frame_context_idx.
> + * - ``V4L2_VP9_RESET_FRAME_CTX_ALL``
> + - Reset all frame contexts.
> +
> +.. c:type:: v4l2_vp9_intra_prediction_mode
> +
> +See section '7.4.5 Intra frame mode info semantics' for more details.
> +
> +.. cssclass:: longtable
> +
> +.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
> +
> +.. flat-table:: enum v4l2_vp9_intra_prediction_mode
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 2
> +
> + * - ``V4L2_VP9_INTRA_PRED_MODE_DC_PRED``
> + - DC intra prediction.
> + * - ``V4L2_VP9_INTRA_PRED_MODE_V_PRED``
> + - Vertical intra prediction.
> + * - ``V4L2_VP9_INTRA_PRED_MODE_H_PRED``
> + - Horizontal intra prediction.
> + * - ``V4L2_VP9_INTRA_PRED_MODE_D45_PRED``
> + - D45 intra prediction.
> + * - ``V4L2_VP9_INTRA_PRED_MODE_D135_PRED``
> + - D135 intra prediction.
> + * - ``V4L2_VP9_INTRA_PRED_MODE_D117_PRED``
> + - D117 intra prediction.
> + * - ``V4L2_VP9_INTRA_PRED_MODE_D153_PRED``
> + - D153 intra prediction.
> + * - ``V4L2_VP9_INTRA_PRED_MODE_D207_PRED``
> + - D207 intra prediction.
> + * - ``V4L2_VP9_INTRA_PRED_MODE_D63_PRED``
> + - D63 intra prediction.
> + * - ``V4L2_VP9_INTRA_PRED_MODE_TM_PRED``
> + - True motion intra prediction.
> +
> +.. c:type:: v4l2_vp9_segmentation
> +
> +Encodes the quantization parameters. See section '7.2.10 Segmentation
> +params syntax' of the VP9 specification for more details.
> +
> +.. cssclass:: longtable
> +
> +.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
> +
> +.. flat-table:: struct v4l2_vp9_segmentation
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - __u8
> + - ``feature_data[8][4]``
> + - Data attached to each feature. Data entry is only valid if the feature
> + is enabled.
> + * - __u8
> + - ``feature_enabled[8]``
> + - Bitmask defining which features are enabled in each segment.
> + * - __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.
> + * - __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'
> + section of :ref:`vp9` for more details.
> + * - __u8
> + - ``flags``
> + - Combination of V4L2_VP9_SEGMENTATION_FLAG_* flags. See
> + :c:type:`v4l2_vp9_segmentation_flags`.
> + * - __u8
> + - ``reserved[5]``
> + - Applications and drivers must set this to zero.
> +
> +.. c:type:: v4l2_vp9_segment_feature
> +
> +Segment feature IDs. See section '7.2.10 Segmentation params syntax' of the
> +VP9 specification for more details.
> +
> +.. cssclass:: longtable
> +
> +.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
> +
> +.. flat-table:: enum v4l2_vp9_segment_feature
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 2
> +
> + * - ``V4L2_VP9_SEG_LVL_ALT_Q``
> + - Quantizer segment feature.
> + * - ``V4L2_VP9_SEG_LVL_ALT_L``
> + - Loop filter segment feature.
> + * - ``V4L2_VP9_SEG_LVL_REF_FRAME``
> + - Reference frame segment feature.
> + * - ``V4L2_VP9_SEG_LVL_SKIP``
> + - Skip segment feature.
> + * - ``V4L2_VP9_SEG_LVL_MAX``
> + - Number of segment features.
> +
> +.. c:type:: v4l2_vp9_segmentation_flags
> +
> +Those are the flags that may be passed to &v4l2_vp9_segmentation.flags. See
> +section '7.2.10 Segmentation params syntax' of the VP9 specification for
> +more details.
> +
> +.. cssclass:: longtable
> +
> +.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
> +
> +.. flat-table:: enum v4l2_vp9_segmentation_flags
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 2
> +
> + * - ``V4L2_VP9_SEGMENTATION_FLAG_ENABLED``
> + - Indicates that this frame makes use of the segmentation tool.
> + * - ``V4L2_VP9_SEGMENTATION_FLAG_UPDATE_MAP``
> + - Indicates that the segmentation map should be updated during the
> + decoding of this frame.
> + * - ``V4L2_VP9_SEGMENTATION_FLAG_TEMPORAL_UPDATE``
> + - Indicates that the updates to the segmentation map are coded
> + relative to the existing segmentation map.
> + * - ``V4L2_VP9_SEGMENTATION_FLAG_UPDATE_DATA``
> + - Indicates that new parameters are about to be specified for each
> + segment.
> + * - ``V4L2_VP9_SEGMENTATION_FLAG_ABS_OR_DELTA_UPDATE``
> + - Indicates that the segmentation parameters represent the actual values
> + to be used.
> +
> +.. c:type:: v4l2_vp9_quantization
> +
> +Encodes the quantization parameters. See section '7.2.9 Quantization params
> +syntax' of the VP9 specification for more details.
> +
> +.. cssclass:: longtable
> +
> +.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
> +
> +.. flat-table:: struct v4l2_vp9_quantization
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - __u8
> + - ``base_q_idx``
> + - Indicates the base frame qindex.
> + * - __s8
> + - ``delta_q_y_dc``
> + - Indicates the Y DC quantizer relative to base_q_idx.
> + * - __s8
> + - ``delta_q_uv_dc``
> + - Indicates the UV DC quantizer relative to base_q_idx.
> + * - __s8
> + - ``delta_q_uv_ac``
> + - Indicates the UV AC quantizer relative to base_q_idx.
> + * - __u8
> + - ``reserved[4]``
> + - Applications and drivers must set this to zero.
> +
> +.. c:type:: v4l2_vp9_loop_filter
> +
> +This structure contains all loop filter related parameters. See sections
> +'7.2.8 Loop filter semantics' of the VP9 specification for more details.
> +
> +.. cssclass:: longtable
> +
> +.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
> +
> +.. flat-table:: struct v4l2_vp9_loop_filter
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - __s8
> + - ``ref_deltas[4]``
> + - Contains the adjustment needed for the filter level based on the chosen
> + reference frame.
> + * - __s8
> + - ``mode_deltas[2]``
> + - Contains the adjustment needed for the filter level based on the chosen
> + mode.
> + * - __u8
> + - ``level``
> + - Indicates the loop filter strength.
> + * - __u8
> + - ``sharpness``
> + - Indicates the sharpness level.
> + * - __u8
> + - ``flags``
> + - Combination of V4L2_VP9_LOOP_FILTER_FLAG_* flags.
> + See :c:type:`v4l2_vp9_loop_filter_flags`.
> + * - __u8
> + - ``reserved[7]``
> + - Applications and drivers must set this to zero.
> +
> +
> +.. c:type:: v4l2_vp9_loop_filter_flags
> +
> +Those are the flags that may be passed. See section '7.2.8 Loop filter
> +semantics' of the VP9 specification for more details.
> +
> +.. cssclass:: longtable
> +
> +.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
> +
> +.. flat-table:: enum v4l2_vp9_loop_filter_flags
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 2
> +
> + * - ``V4L2_VP9_LOOP_FILTER_FLAG_DELTA_ENABLED``
> + - When set, the filter level depends on the mode and reference frame used
> + to predict a block.
> + * - ``V4L2_VP9_LOOP_FILTER_FLAG_DELTA_UPDATE``
> + - When set, the bitstream contains additional syntax elements that
> + specify which mode and reference frame deltas are to be updated.
> diff --git a/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst b/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst
> index 0ede39907ee2..1b20f48a24b9 100644
> --- a/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst
> +++ b/Documentation/userspace-api/media/v4l/pixfmt-compressed.rst
> @@ -172,6 +172,21 @@ Compressed Formats
> - VP9 compressed video frame. The encoder generates one
> compressed frame per buffer, and the decoder requires one
> compressed frame per buffer.
> + * .. _V4L2-PIX-FMT-VP9-FRAME:
> +
> + - ``V4L2_PIX_FMT_VP9_FRAME``
> + - 'VP9F'
> + - VP9 parsed frame, including the frame header, as extracted from the container.
> + This format is adapted for stateless video decoders that implement a
> + VP9 pipeline with the :ref:`stateless_decoder`.
> + Metadata associated with the frame to decode is required to be passed
> + through the ``V4L2_CID_STATELESS_VP9_FRAME`` and
> + the ``V4L2_CID_STATELESS_VP9_COMPRESSED_HDR_PROBS`` controls.
> + See the :ref:`associated Codec Control IDs <v4l2-codec-stateless-vp9>`.
> + Exactly one output and one capture buffer must be provided for use with
> + this pixel format. The output buffer must contain the appropriate number
> + of macroblocks to decode a full corresponding frame to the matching
> + capture buffer.
> * .. _V4L2-PIX-FMT-HEVC:
>
> - ``V4L2_PIX_FMT_HEVC``
> diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
> index 2d6bc8d94380..258895ff0c71 100644
> --- a/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
> +++ b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
> @@ -233,6 +233,14 @@ still cause this situation.
> - ``p_mpeg2_quantisation``
> - A pointer to a struct :c:type:`v4l2_ctrl_mpeg2_quantisation`. Valid if this control is
> of type ``V4L2_CTRL_TYPE_MPEG2_QUANTISATION``.
> + * - struct :c:type:`v4l2_ctrl_vp9_compressed_hdr_probs` *
> + - ``p_vp9_compressed_hdr_probs``
> + - A pointer to a struct :c:type:`v4l2_ctrl_vp9_compressed_hdr_probs`. Valid if this
> + control is of type ``V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR_PROBS``.
> + * - struct :c:type:`v4l2_ctrl_vp9_frame` *
> + - ``p_vp9_frame``
> + - A pointer to a struct :c:type:`v4l2_ctrl_vp9_frame`. Valid if this
> + control is of type ``V4L2_CTRL_TYPE_VP9_FRAME``.
> * - struct :c:type:`v4l2_ctrl_hdr10_cll_info` *
> - ``p_hdr10_cll``
> - A pointer to a struct :c:type:`v4l2_ctrl_hdr10_cll_info`. Valid if this control is
> diff --git a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
> index f9ecf6276129..e0c6a5d9ff6b 100644
> --- a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
> +++ b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
> @@ -507,6 +507,18 @@ See also the examples in :ref:`control`.
> - n/a
> - A struct :c:type:`v4l2_ctrl_hevc_decode_params`, containing HEVC
> decoding parameters for stateless video decoders.
> + * - ``V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR_PROBS``
> + - n/a
> + - n/a
> + - n/a
> + - A struct :c:type:`v4l2_ctrl_vp9_compressed_hdr_probs`, containing VP9
> + probabilities updates for stateless video decoders.
> + * - ``V4L2_CTRL_TYPE_VP9_FRAME``
> + - n/a
> + - n/a
> + - n/a
> + - A struct :c:type:`v4l2_ctrl_vp9_frame`, containing VP9
> + frame decode parameters for stateless video decoders.
>
> .. raw:: latex
>
> diff --git a/Documentation/userspace-api/media/videodev2.h.rst.exceptions b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
> index eb0b1cd37abd..129ef3edfa73 100644
> --- a/Documentation/userspace-api/media/videodev2.h.rst.exceptions
> +++ b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
> @@ -149,6 +149,8 @@ replace symbol V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS :c:type:`v4l2_ctrl_type`
> replace symbol V4L2_CTRL_TYPE_AREA :c:type:`v4l2_ctrl_type`
> replace symbol V4L2_CTRL_TYPE_FWHT_PARAMS :c:type:`v4l2_ctrl_type`
> replace symbol V4L2_CTRL_TYPE_VP8_FRAME :c:type:`v4l2_ctrl_type`
> +replace symbol V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR_PROBS :c:type:`v4l2_ctrl_type`
> +replace symbol V4L2_CTRL_TYPE_VP9_FRAME :c:type:`v4l2_ctrl_type`
> replace symbol V4L2_CTRL_TYPE_HDR10_CLL_INFO :c:type:`v4l2_ctrl_type`
> replace symbol V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY :c:type:`v4l2_ctrl_type`
>
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls-core.c b/drivers/media/v4l2-core/v4l2-ctrls-core.c
> index c4b5082849b6..ed9cf298a83a 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls-core.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls-core.c
> @@ -283,6 +283,12 @@ static void std_log(const struct v4l2_ctrl *ctrl)
> case V4L2_CTRL_TYPE_MPEG2_PICTURE:
> pr_cont("MPEG2_PICTURE");
> break;
> + case V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR_PROBS:
> + pr_cont("VP9_COMPRESSED_HDR_PROBS");
> + break;
> + case V4L2_CTRL_TYPE_VP9_FRAME:
> + pr_cont("VP9_FRAME");
> + break;
> default:
> pr_cont("unknown type %d", ctrl->type);
> break;
> @@ -317,6 +323,162 @@ static void std_log(const struct v4l2_ctrl *ctrl)
> #define zero_reserved(s) \
> memset(&(s).reserved, 0, sizeof((s).reserved))
>
> +static int
> +validate_vp9_lf_params(struct v4l2_vp9_loop_filter *lf)
> +{
> + unsigned int i;
> +
> + if (lf->flags & ~(V4L2_VP9_LOOP_FILTER_FLAG_DELTA_ENABLED |
> + V4L2_VP9_LOOP_FILTER_FLAG_DELTA_UPDATE))
> + return -EINVAL;
> +
> + /* That all values are in the accepted range. */
> + if (lf->level > GENMASK(5, 0))
> + return -EINVAL;
> +
> + if (lf->sharpness > GENMASK(2, 0))
> + return -EINVAL;
> +
> + for (i = 0; i < ARRAY_SIZE(lf->ref_deltas); i++)
> + if (lf->ref_deltas[i] < -63 || lf->ref_deltas[i] > 63)
> + return -EINVAL;
> +
> + for (i = 0; i < ARRAY_SIZE(lf->mode_deltas); i++)
> + if (lf->mode_deltas[i] < -63 || lf->mode_deltas[i] > 63)
> + return -EINVAL;
> +
> + zero_reserved(*lf);
> + return 0;
> +}
> +
> +static int
> +validate_vp9_quant_params(struct v4l2_vp9_quantization *quant)
> +{
> + if (quant->delta_q_y_dc < -15 || quant->delta_q_y_dc > 15 ||
> + quant->delta_q_uv_dc < -15 || quant->delta_q_uv_dc > 15 ||
> + quant->delta_q_uv_ac < -15 || quant->delta_q_uv_ac > 15)
> + return -EINVAL;
> +
> + zero_reserved(*quant);
> + return 0;
> +}
> +
> +static int
> +validate_vp9_seg_params(struct v4l2_vp9_segmentation *seg)
> +{
> + unsigned int i, j;
> +
> + if (seg->flags & ~(V4L2_VP9_SEGMENTATION_FLAG_ENABLED |
> + V4L2_VP9_SEGMENTATION_FLAG_UPDATE_MAP |
> + V4L2_VP9_SEGMENTATION_FLAG_TEMPORAL_UPDATE |
> + V4L2_VP9_SEGMENTATION_FLAG_UPDATE_DATA |
> + V4L2_VP9_SEGMENTATION_FLAG_ABS_OR_DELTA_UPDATE))
> + return -EINVAL;
> +
> + for (i = 0; i < ARRAY_SIZE(seg->feature_enabled); i++) {
> + if (seg->feature_enabled[i] &
> + ~V4L2_VP9_SEGMENT_FEATURE_ENABLED_MASK)
> + return -EINVAL;
> + }
> +
> + for (i = 0; i < ARRAY_SIZE(seg->feature_data); i++) {
> + const int range[] = { 255, 63, 3, 0 };
> +
> + for (j = 0; j < ARRAY_SIZE(seg->feature_data[j]); j++) {
> + if (seg->feature_data[i][j] < -range[j] ||
> + seg->feature_data[i][j] > range[j])
> + return -EINVAL;
> + }
> + }
> +
> + zero_reserved(*seg);
> + return 0;
> +}
> +
> +static int
> +validate_vp9_frame(struct v4l2_ctrl_vp9_frame *frame)
> +{
> + int ret;
> +
> + /* Make sure we're not passed invalid flags. */
> + if (frame->flags & ~(V4L2_VP9_FRAME_FLAG_KEY_FRAME |
> + V4L2_VP9_FRAME_FLAG_SHOW_FRAME |
> + V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT |
> + V4L2_VP9_FRAME_FLAG_INTRA_ONLY |
> + V4L2_VP9_FRAME_FLAG_ALLOW_HIGH_PREC_MV |
> + V4L2_VP9_FRAME_FLAG_REFRESH_FRAME_CTX |
> + V4L2_VP9_FRAME_FLAG_PARALLEL_DEC_MODE |
> + V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING |
> + V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING |
> + V4L2_VP9_FRAME_FLAG_COLOR_RANGE_FULL_SWING))
> + return -EINVAL;
> +
> + if (frame->flags & V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT &&
> + frame->flags & V4L2_VP9_FRAME_FLAG_REFRESH_FRAME_CTX)
> + return -EINVAL;
> +
> + if (frame->profile > V4L2_VP9_PROFILE_MAX)
> + return -EINVAL;
> +
> + if (frame->reset_frame_context > V4L2_VP9_RESET_FRAME_CTX_ALL)
> + return -EINVAL;
> +
> + if (frame->frame_context_idx >= V4L2_VP9_NUM_FRAME_CTX)
> + return -EINVAL;
> +
> + /*
> + * Profiles 0 and 1 only support 8-bit depth, profiles 2 and 3 only 10
> + * and 12 bit depths.
> + */
> + if ((frame->profile < 2 && frame->bit_depth != 8) ||
> + (frame->profile >= 2 &&
> + (frame->bit_depth != 10 && frame->bit_depth != 12)))
> + return -EINVAL;
> +
> + /* Profile 0 and 2 only accept YUV 4:2:0. */
> + if ((frame->profile == 0 || frame->profile == 2) &&
> + (!(frame->flags & V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING) ||
> + !(frame->flags & V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING)))
> + return -EINVAL;
> +
> + /* Profile 1 and 3 only accept YUV 4:2:2, 4:4:0 and 4:4:4. */
> + if ((frame->profile == 1 || frame->profile == 3) &&
> + ((frame->flags & V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING) &&
> + (frame->flags & V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING)))
> + return -EINVAL;
> +
> + if (frame->interpolation_filter > V4L2_VP9_INTERP_FILTER_SWITCHABLE)
> + return -EINVAL;
> +
> + /*
> + * According to the spec, tile_cols_log2 shall be less than or equal
> + * to 6.
> + */
> + if (frame->tile_cols_log2 > 6)
> + return -EINVAL;
> +
> + if (frame->tx_mode > V4L2_VP9_TX_MODE_SELECT)
> + return -EINVAL;
> +
> + if (frame->reference_mode > V4L2_VP9_REFERENCE_MODE_SELECT)
> + return -EINVAL;
> +
> + ret = validate_vp9_lf_params(&frame->lf);
> + if (ret)
> + return ret;
> +
> + ret = validate_vp9_quant_params(&frame->quant);
> + if (ret)
> + return ret;
> +
> + ret = validate_vp9_seg_params(&frame->seg);
> + if (ret)
> + return ret;
> +
> + zero_reserved(*frame);
> + return 0;
> +}
> +
> /*
> * Compound controls validation requires setting unused fields/flags to zero
> * in order to properly detect unchanged controls with std_equal's memcmp.
> @@ -687,6 +849,12 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
>
> break;
>
> + case V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR_PROBS:
> + break;
> +
> + case V4L2_CTRL_TYPE_VP9_FRAME:
> + return validate_vp9_frame(p);
> +
> case V4L2_CTRL_TYPE_AREA:
> area = p;
> if (!area->width || !area->height)
> @@ -1249,6 +1417,12 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
> case V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY:
> elem_size = sizeof(struct v4l2_ctrl_hdr10_mastering_display);
> break;
> + case V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR_PROBS:
> + elem_size = sizeof(struct v4l2_ctrl_vp9_compressed_hdr_probs);
> + break;
> + case V4L2_CTRL_TYPE_VP9_FRAME:
> + elem_size = sizeof(struct v4l2_ctrl_vp9_frame);
> + break;
> case V4L2_CTRL_TYPE_AREA:
> elem_size = sizeof(struct v4l2_area);
> break;
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls-defs.c b/drivers/media/v4l2-core/v4l2-ctrls-defs.c
> index 421300e13a41..d383c438156f 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls-defs.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls-defs.c
> @@ -1175,6 +1175,8 @@ const char *v4l2_ctrl_get_name(u32 id)
> case V4L2_CID_STATELESS_MPEG2_SEQUENCE: return "MPEG-2 Sequence Header";
> case V4L2_CID_STATELESS_MPEG2_PICTURE: return "MPEG-2 Picture Header";
> case V4L2_CID_STATELESS_MPEG2_QUANTISATION: return "MPEG-2 Quantisation Matrices";
> + case V4L2_CID_STATELESS_VP9_COMPRESSED_HDR_PROBS: return "VP9 Probabilities Updates";
> + case V4L2_CID_STATELESS_VP9_FRAME: return "VP9 Frame Decode Parameters";
>
> /* Colorimetry controls */
> /* Keep the order of the 'case's the same as in v4l2-controls.h! */
> @@ -1493,6 +1495,12 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
> case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_PARAMS:
> *type = V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS;
> break;
> + case V4L2_CID_STATELESS_VP9_COMPRESSED_HDR_PROBS:
> + *type = V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR_PROBS;
> + break;
> + case V4L2_CID_STATELESS_VP9_FRAME:
> + *type = V4L2_CTRL_TYPE_VP9_FRAME;
> + break;
> case V4L2_CID_UNIT_CELL_SIZE:
> *type = V4L2_CTRL_TYPE_AREA;
> *flags |= V4L2_CTRL_FLAG_READ_ONLY;
> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
> index ec6fc1ef291e..7a5e8120d733 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -1394,6 +1394,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
> case V4L2_PIX_FMT_VP8: descr = "VP8"; break;
> case V4L2_PIX_FMT_VP8_FRAME: descr = "VP8 Frame"; break;
> case V4L2_PIX_FMT_VP9: descr = "VP9"; break;
> + case V4L2_PIX_FMT_VP9_FRAME: descr = "VP9 Frame"; break;
> case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */
> case V4L2_PIX_FMT_HEVC_SLICE: descr = "HEVC Parsed Slice Data"; break;
> case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */
> diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
> index 575b59fbac77..3ea4386ebd91 100644
> --- a/include/media/v4l2-ctrls.h
> +++ b/include/media/v4l2-ctrls.h
> @@ -50,6 +50,8 @@ struct video_device;
> * @p_h264_decode_params: Pointer to a struct v4l2_ctrl_h264_decode_params.
> * @p_h264_pred_weights: Pointer to a struct v4l2_ctrl_h264_pred_weights.
> * @p_vp8_frame: Pointer to a VP8 frame params structure.
> + * @p_vp9_compressed_hdr_probs: Pointer to a VP9 frame compressed header probs structure.
> + * @p_vp9_frame: Pointer to a VP9 frame params structure.
> * @p_hevc_sps: Pointer to an HEVC sequence parameter set structure.
> * @p_hevc_pps: Pointer to an HEVC picture parameter set structure.
> * @p_hevc_slice_params: Pointer to an HEVC slice parameters structure.
> @@ -80,6 +82,8 @@ union v4l2_ctrl_ptr {
> struct v4l2_ctrl_hevc_sps *p_hevc_sps;
> struct v4l2_ctrl_hevc_pps *p_hevc_pps;
> struct v4l2_ctrl_hevc_slice_params *p_hevc_slice_params;
> + struct v4l2_ctrl_vp9_compressed_hdr_probs *p_vp9_compressed_hdr_probs;
> + struct v4l2_ctrl_vp9_frame *p_vp9_frame;
> struct v4l2_ctrl_hdr10_cll_info *p_hdr10_cll;
> struct v4l2_ctrl_hdr10_mastering_display *p_hdr10_mastering;
> struct v4l2_area *p_area;
> diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
> index 5532b5f68493..8f8c3c1ad885 100644
> --- a/include/uapi/linux/v4l2-controls.h
> +++ b/include/uapi/linux/v4l2-controls.h
> @@ -2010,6 +2010,439 @@ struct v4l2_ctrl_hdr10_mastering_display {
> __u32 min_display_mastering_luminance;
> };
>
> +/* Stateless VP9 controls */
> +
> +/**
> + * enum v4l2_vp9_loop_filter_flags - VP9 loop filter flags
> + *
> + * @V4L2_VP9_LOOP_FILTER_FLAG_DELTA_ENABLED: the filter level depends on
> + * the mode and reference frame used to predict a block
> + * @V4L2_VP9_LOOP_FILTER_FLAG_DELTA_UPDATE: the bitstream contains additional
> + * syntax elements that specify which mode and reference frame deltas are to be updated
> + *
> + * Those are the flags that may be passed to &v4l2_vp9_loop_filter.flags. See
> + * section '7.2.8 Loop filter semantics' of the VP9 specification for more
> + * details.
> + */
> +enum v4l2_vp9_loop_filter_flags {
> + V4L2_VP9_LOOP_FILTER_FLAG_DELTA_ENABLED = 1 << 0,
> + V4L2_VP9_LOOP_FILTER_FLAG_DELTA_UPDATE = 1 << 1,
> +};
> +
> +/**
> + * struct v4l2_vp9_loop_filter - VP9 loop filter parameters
> + *
> + * @ref_deltas: contains the adjustment needed for the filter level based on the chosen
> + * reference frame. If this syntax element is not present in the bitstream, users
> + * should pass its last value.
> + * @mode_deltas: contains the adjustment needed for the filter level based on the chosen mode.
> + * If this syntax element is not present in the bitstream, users
> + * should pass its last value.
> + * @level: indicates the loop filter strength
> + * @sharpness: indicates the sharpness level
> + * @flags: combination of V4L2_VP9_LOOP_FILTER_FLAG_* flags
> + * @reserved: padding field. Should be zeroed by applications.
> + *
> + * This structure contains all loop filter related parameters. See sections
> + * '7.2.8 Loop filter semantics' of the VP9 specification for more details.
> + */
> +struct v4l2_vp9_loop_filter {
> + __s8 ref_deltas[4];
> + __s8 mode_deltas[2];
> + __u8 level;
> + __u8 sharpness;
> + __u8 flags;
> + __u8 reserved[7];
> +};
> +
> +/**
> + * struct v4l2_vp9_quantization - VP9 quantization parameters
> + *
> + * @base_q_idx: indicates the base frame qindex
> + * @delta_q_y_dc: indicates the Y DC quantizer relative to base_q_idx
> + * @delta_q_uv_dc: indicates the UV DC quantizer relative to base_q_idx
> + * @delta_q_uv_ac: indicates the UV AC quantizer relative to base_q_idx
> + * @reserved: padding field. Should be zeroed by applications.
> + *
> + * Encodes the quantization parameters. See section '7.2.9 Quantization params
> + * syntax' of the VP9 specification for more details.
> + */
> +struct v4l2_vp9_quantization {
> + __u8 base_q_idx;
> + __s8 delta_q_y_dc;
> + __s8 delta_q_uv_dc;
> + __s8 delta_q_uv_ac;
> + __u8 reserved[4];
> +};
> +
> +/**
> + * enum v4l2_vp9_segmentation_flags - VP9 segmentation flags
> + *
> + * @V4L2_VP9_SEGMENTATION_FLAG_ENABLED: indicates that this frame makes use of
> + * the segmentation tool
> + * @V4L2_VP9_SEGMENTATION_FLAG_UPDATE_MAP: indicates that the segmentation map
> + * should be updated during the decoding of this frame
> + * @V4L2_VP9_SEGMENTATION_FLAG_TEMPORAL_UPDATE: indicates that the updates to
> + * the segmentation map are coded relative to the existing segmentation map
> + * @V4L2_VP9_SEGMENTATION_FLAG_UPDATE_DATA: indicates that new parameters are
> + * about to be specified for each segment
> + * @V4L2_VP9_SEGMENTATION_FLAG_ABS_OR_DELTA_UPDATE: indicates that the
> + * segmentation parameters represent the actual values to be used
> + *
> + * Those are the flags that may be passed to &v4l2_vp9_segmentation.flags. See
> + * section '7.2.10 Segmentation params syntax' of the VP9 specification for
> + * more details.
> + */
> +enum v4l2_vp9_segmentation_flags {
> + V4L2_VP9_SEGMENTATION_FLAG_ENABLED = 1 << 0,
> + V4L2_VP9_SEGMENTATION_FLAG_UPDATE_MAP = 1 << 1,
> + V4L2_VP9_SEGMENTATION_FLAG_TEMPORAL_UPDATE = 1 << 2,
> + V4L2_VP9_SEGMENTATION_FLAG_UPDATE_DATA = 1 << 3,
> + V4L2_VP9_SEGMENTATION_FLAG_ABS_OR_DELTA_UPDATE = 1 << 4,
> +};
> +
> +#define V4L2_VP9_SEGMENT_FEATURE_ENABLED(id) (1 << (id))
> +#define V4L2_VP9_SEGMENT_FEATURE_ENABLED_MASK 0xf
> +
> +/**
> + * enum v4l2_vp9_segment_feature - VP9 segment feature IDs
> + *
> + * @V4L2_VP9_SEG_LVL_ALT_Q: quantizer segment feature
> + * @V4L2_VP9_SEG_LVL_ALT_L: loop filter segment feature
> + * @V4L2_VP9_SEG_LVL_REF_FRAME reference frame segment feature
> + * @V4L2_VP9_SEG_LVL_SKIP: skip segment feature
> + * @V4L2_VP9_SEG_LVV_MAX: number of segment features
> + *
> + * Segment feature IDs. See section '7.2.10 Segmentation params syntax' of the
> + * VP9 specification for more details.
> + */
> +enum v4l2_vp9_segment_feature {
> + V4L2_VP9_SEG_LVL_ALT_Q,
> + V4L2_VP9_SEG_LVL_ALT_L,
> + V4L2_VP9_SEG_LVL_REF_FRAME,
> + V4L2_VP9_SEG_LVL_SKIP,
> + V4L2_VP9_SEG_LVL_MAX,
> +};
> +
> +/**
> + * struct v4l2_vp9_segmentation - VP9 segmentation parameters
> + *
> + * @feature_data: data attached to each feature. Data entry is only valid if the feature is enabled
> + * @feature_enabled: bitmask defining which features are enabled in each segment
> + * @tree_probs: specifies the probability values to be used when
> + * decoding a Segment-ID. See '5.15. Segmentation map' section of the VP9 specification
> + * for more details.
> + * @pred_probs: specifies the probability values to be used when decoding a
> + * Predicted-Segment-ID. See '6.4.14. Get segment id syntax' section of :ref:`vp9`
> + * for more details.
> + * @flags: combination of V4L2_VP9_SEGMENTATION_FLAG_* flags
> + * @reserved: padding field. Should be zeroed by applications.
> + *
> + * Encodes the quantization parameters. See section '7.2.10 Segmentation params syntax' of
> + * the VP9 specification for more details.
> + */
> +struct v4l2_vp9_segmentation {
> + __s16 feature_data[8][4];
> + __u8 feature_enabled[8];
> + __u8 tree_probs[7];
> + __u8 pred_probs[3];
> + __u8 flags;
> + __u8 reserved[5];
> +};
> +
> +/**
> + * enum v4l2_vp9_intra_prediction_mode - VP9 Intra prediction modes
> + *
> + * @V4L2_VP9_INTRA_PRED_MODE_DC_PRED: DC intra prediction
> + * @V4L2_VP9_INTRA_PRED_MODE_V_PRED: vertical intra prediction
> + * @V4L2_VP9_INTRA_PRED_MODE_H_PRED: horizontal intra prediction
> + * @V4L2_VP9_INTRA_PRED_MODE_D45_PRED: D45 intra prediction
> + * @V4L2_VP9_INTRA_PRED_MODE_D135_PRED: D135 intra prediction
> + * @V4L2_VP9_INTRA_PRED_MODE_D117_PRED: D117 intra prediction
> + * @V4L2_VP9_INTRA_PRED_MODE_D153_PRED: D153 intra prediction
> + * @V4L2_VP9_INTRA_PRED_MODE_D207_PRED: D207 intra prediction
> + * @V4L2_VP9_INTRA_PRED_MODE_D63_PRED: D63 intra prediction
> + * @V4L2_VP9_INTRA_PRED_MODE_TM_PRED: True Motion intra prediction
> + *
> + * See section '7.4.5 Intra frame mode info semantics' for more details.
> + */
> +enum v4l2_vp9_intra_prediction_mode {
> + V4L2_VP9_INTRA_PRED_MODE_DC_PRED,
> + V4L2_VP9_INTRA_PRED_MODE_V_PRED,
> + V4L2_VP9_INTRA_PRED_MODE_H_PRED,
> + V4L2_VP9_INTRA_PRED_MODE_D45_PRED,
> + V4L2_VP9_INTRA_PRED_MODE_D135_PRED,
> + V4L2_VP9_INTRA_PRED_MODE_D117_PRED,
> + V4L2_VP9_INTRA_PRED_MODE_D153_PRED,
> + V4L2_VP9_INTRA_PRED_MODE_D207_PRED,
> + V4L2_VP9_INTRA_PRED_MODE_D63_PRED,
> + V4L2_VP9_INTRA_PRED_MODE_TM_PRED,
> +};
> +
> +/**
> + * enum v4l2_vp9_reset_frame_context - Valid values for
> + * &v4l2_ctrl_vp9_frame->reset_frame_context
> + *
> + * @V4L2_VP9_RESET_FRAME_CTX_NONE: don't reset any frame context
> + * @V4L2_VP9_RESET_FRAME_CTX_SPEC: reset the frame context pointed by
> + * &v4l2_ctrl_vp9_frame.frame_context_idx
> + * @V4L2_VP9_RESET_FRAME_CTX_ALL: reset all frame contexts
> + *
> + * See section '7.2 Uncompressed header semantics' of the VP9 specification for more details.
> + */
> +enum v4l2_vp9_reset_frame_context {
> + V4L2_VP9_RESET_FRAME_CTX_NONE,
> + V4L2_VP9_RESET_FRAME_CTX_SPEC,
> + V4L2_VP9_RESET_FRAME_CTX_ALL,
> +};
> +
> +/**
> + * enum v4l2_vp9_interpolation_filter - VP9 interpolation filter types
> + *
> + * @V4L2_VP9_INTERP_FILTER_EIGHTTAP: eight tap filter
> + * @V4L2_VP9_INTERP_FILTER_EIGHTTAP_SMOOTH: eight tap smooth filter
> + * @V4L2_VP9_INTERP_FILTER_EIGHTTAP_SHARP: eight tap sharp filter
> + * @V4L2_VP9_INTERP_FILTER_BILINEAR: bilinear filter
> + * @V4L2_VP9_INTERP_FILTER_SWITCHABLE: filter selection is signaled at the block level
> + *
> + * See section '7.2.7 Interpolation filter semantics' of the VP9 specification
> + * for more details.
> + */
> +enum v4l2_vp9_interpolation_filter {
> + V4L2_VP9_INTERP_FILTER_EIGHTTAP,
> + V4L2_VP9_INTERP_FILTER_EIGHTTAP_SMOOTH,
> + V4L2_VP9_INTERP_FILTER_EIGHTTAP_SHARP,
> + V4L2_VP9_INTERP_FILTER_BILINEAR,
> + V4L2_VP9_INTERP_FILTER_SWITCHABLE,
> +};
> +
> +/**
> + * enum v4l2_vp9_reference_mode - VP9 reference modes
> + *
> + * @V4L2_VP9_REFERENCE_MODE_SINGLE_REFERENCE: indicates that all the inter blocks use only a
> + * single reference frame to generate motion compensated prediction
> + * @V4L2_VP9_REFERENCE_MODE_COMPOUND_REFERENCE: requires all the inter blocks to use compound mode.
> + * Single reference frame prediction is not allowed
> + * @V4L2_VP9_REFERENCE_MODE_SELECT: allows each individual inter block to select between single
> + * and compound prediction modes
> + *
> + * See section '7.3.6 Frame reference mode semantics' of the VP9 specification
> + * for more details.
> + */
> +enum v4l2_vp9_reference_mode {
> + V4L2_VP9_REFERENCE_MODE_SINGLE_REFERENCE,
> + V4L2_VP9_REFERENCE_MODE_COMPOUND_REFERENCE,
> + V4L2_VP9_REFERENCE_MODE_SELECT,
> +};
> +
> +/**
> + * enum v4l2_vp9_tx_mode - VP9 TX modes
> + *
> + * @V4L2_VP9_TX_MODE_ONLY_4X4: transform size is 4x4
> + * @V4L2_VP9_TX_MODE_ALLOW_8X8: transform size can be up to 8x8
> + * @V4L2_VP9_TX_MODE_ALLOW_16X16: transform size can be up to 16x16
> + * @V4L2_VP9_TX_MODE_ALLOW_32X32: transform size can be up to 32x32
> + * @V4L2_VP9_TX_MODE_SELECT: bitstream contains the transform size for each block
> + *
> + * See section '7.3.1 Tx mode semantics' of the VP9 specification for more details.
> + */
> +enum v4l2_vp9_tx_mode {
> + V4L2_VP9_TX_MODE_ONLY_4X4,
> + V4L2_VP9_TX_MODE_ALLOW_8X8,
> + V4L2_VP9_TX_MODE_ALLOW_16X16,
> + V4L2_VP9_TX_MODE_ALLOW_32X32,
> + V4L2_VP9_TX_MODE_SELECT,
> +};
> +
> +/**
> + * enum v4l2_vp9_frame_flags - VP9 frame flags
> + * @V4L2_VP9_FRAME_FLAG_KEY_FRAME: the frame is a key frame
> + * @V4L2_VP9_FRAME_FLAG_SHOW_FRAME: the frame should be displayed
> + * @V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT: the decoding should be error resilient
> + * @V4L2_VP9_FRAME_FLAG_INTRA_ONLY: the frame does not reference other frames
> + * @V4L2_VP9_FRAME_FLAG_ALLOW_HIGH_PREC_MV: the frame can use high precision motion vectors
> + * @V4L2_VP9_FRAME_FLAG_REFRESH_FRAME_CTX: frame context should be updated after decoding
> + * @V4L2_VP9_FRAME_FLAG_PARALLEL_DEC_MODE: parallel decoding is used
> + * @V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING: vertical subsampling is enabled
> + * @V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING: horizontal subsampling is enabled
> + * @V4L2_VP9_FRAME_FLAG_COLOR_RANGE_FULL_SWING: full UV range is used
> + *
> + * Check the VP9 specification for more details.
> + */
> +enum v4l2_vp9_frame_flags {
> + V4L2_VP9_FRAME_FLAG_KEY_FRAME = 1 << 0,
> + V4L2_VP9_FRAME_FLAG_SHOW_FRAME = 1 << 1,
> + V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT = 1 << 2,
> + V4L2_VP9_FRAME_FLAG_INTRA_ONLY = 1 << 3,
> + V4L2_VP9_FRAME_FLAG_ALLOW_HIGH_PREC_MV = 1 << 4,
> + V4L2_VP9_FRAME_FLAG_REFRESH_FRAME_CTX = 1 << 5,
> + V4L2_VP9_FRAME_FLAG_PARALLEL_DEC_MODE = 1 << 6,
> + V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING = 1 << 7,
> + V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING = 1 << 8,
> + V4L2_VP9_FRAME_FLAG_COLOR_RANGE_FULL_SWING = 1 << 9,
> +};
> +
> +/**
> + * enum v4l2_vp9_ref_frame_sign_bias - Whether ref_frame_sign_bias is 1 for a given reference frame
> + * @V4L2_VP9_SIGN_BIAS_LAST: ref_frame_sign_bias is 1 for the "last" reference frame
> + * @V4L2_VP9_SIGN_BIAS_GOLDEN: ref_frame_sign_bias is 1 for the "golden" reference frame
> + * @V4L2_VP9_SIGN_BIAS_ALT: ref_frame_sign_bias is 1 for the "alt" reference frame
> + */
> +
> +enum v4l2_vp9_ref_frame_sign_bias {
> + V4L2_VP9_SIGN_BIAS_LAST,
> + V4L2_VP9_SIGN_BIAS_GOLDEN,
> + V4L2_VP9_SIGN_BIAS_ALT,
> +};
> +
> +#define V4L2_VP9_PROFILE_MAX 3
> +
> +#define V4L2_CID_STATELESS_VP9_FRAME (V4L2_CID_CODEC_STATELESS_BASE + 300)
> +/**
> + * struct v4l2_ctrl_vp9_frame - VP9 frame decoding control
> + *
> + * @lf: loop filter parameters. See &v4l2_vp9_loop_filter for more details
> + * @quant: quantization parameters. See &v4l2_vp9_quantization for more details
> + * @seg: segmentation parameters. See &v4l2_vp9_segmentation for more details
> + * @flags: combination of V4L2_VP9_FRAME_FLAG_* flags
> + * @compressed_header_size: compressed header size in bytes
> + * @uncompressed_header_size: uncompressed header size in bytes
> + * @frame_width_minus_1: add 1 to it and you'll get the frame width expressed in pixels
> + * @frame_height_minus_1: add 1 to it and you'll get the frame height expressed in pixels
> + * @render_width_minus_1: add 1 to it and you'll get the expected render width expressed in
> + * pixels. This is not used during the decoding process but might be used by HW scalers
> + * to prepare a frame that's ready for scanout
> + * @render_height_minus_1: add 1 to it and you'll get the expected render height expressed in
> + * pixels. This is not used during the decoding process but might be used by HW scalers
> + * to prepare a frame that's ready for scanout
> + * @last_frame_ts: "last" reference buffer timestamp.
> + * The timestamp refers to the timestamp field in struct v4l2_buffer.
> + * Use v4l2_timeval_to_ns() to convert the struct timeval to a __u64.
> + * @golden_frame_ts: "golden" reference buffer timestamp.
> + * The timestamp refers to the timestamp field in struct v4l2_buffer.
> + * Use v4l2_timeval_to_ns() to convert the struct timeval to a __u64.
> + * @alt_frame_ts: "alt" reference buffer timestamp.
> + * The timestamp refers to the timestamp field in struct v4l2_buffer.
> + * Use v4l2_timeval_to_ns() to convert the struct timeval to a __u64.
> + * @ref_frame_sign_bias: a bitfield specifying whether the sign bias is set for a given
> + * reference frame. See &v4l2_vp9_ref_frame_sign_bias for more details.
> + * @reset_frame_context: specifies whether the frame context should be reset to default values.
> + * See &v4l2_vp9_reset_frame_context for more details
> + * @frame_context_idx: frame context that should be used/updated
> + * @profile: VP9 profile. Can be 0, 1, 2 or 3
> + * @bit_depth: bits per components. Can be 8, 10 or 12. Note that not all profiles support
> + * 10 and/or 12 bits depths
> + * @interpolation_filter: specifies the filter selection used for performing inter prediction.
> + * See &v4l2_vp9_interpolation_filter for more details
> + * @tile_cols_log2: specifies the base 2 logarithm of the width of each tile (where the width
> + * is measured in units of 8x8 blocks). Shall be less than or equal to 6
> + * @tile_rows_log2: specifies the base 2 logarithm of the height of each tile (where the height
> + * is measured in units of 8x8 blocks)
> + * @tx_mode: specifies the TX mode. See &v4l2_vp9_tx_mode for more details
> + * @reference_mode: specifies the type of inter prediction to be used. See
> + * &v4l2_vp9_reference_mode for more details
> + * @reserved: padding field. Should be zeroed by applications.
> + */
> +struct v4l2_ctrl_vp9_frame {
> + struct v4l2_vp9_loop_filter lf;
> + struct v4l2_vp9_quantization quant;
> + struct v4l2_vp9_segmentation seg;
> + __u32 flags;
> + __u16 compressed_header_size;
> + __u16 uncompressed_header_size;
> + __u16 frame_width_minus_1;
> + __u16 frame_height_minus_1;
> + __u16 render_width_minus_1;
> + __u16 render_height_minus_1;
> + __u64 last_frame_ts;
> + __u64 golden_frame_ts;
> + __u64 alt_frame_ts;
> + __u8 ref_frame_sign_bias;
> + __u8 reset_frame_context;
> + __u8 frame_context_idx;
> + __u8 profile;
> + __u8 bit_depth;
> + __u8 interpolation_filter;
> + __u8 tile_cols_log2;
> + __u8 tile_rows_log2;
> + __u8 tx_mode;
> + __u8 reference_mode;
> + __u8 reserved[6];
> +};
> +
> +#define V4L2_VP9_NUM_FRAME_CTX 4
> +
> +/**
> + * struct v4l2_vp9_mv_compressed_hdr_probs - VP9 Motion vector probability updates
> + * @joint: motion vector joint probability updates
> + * @sign: motion vector sign probability updates
> + * @classes: motion vector class probability updates
> + * @class0_bit: motion vector class0 bit probability updates
> + * @bits: motion vector bits probability updates
> + * @class0_fr: motion vector class0 fractional bit probability updates
> + * @fr: motion vector fractional bit probability updates
> + * @class0_hp: motion vector class0 high precision fractional bit probability updates
> + * @hp: motion vector high precision fractional bit probability updates
> + *
> + * This structure contains new values of motion vector probabilities.
> + * A value of zero in an array element means there is no update of the relevant probability.
> + * See `struct v4l2_vp9_prob_updates` for details.
> + */
> +struct v4l2_vp9_mv_compressed_hdr_probs {
> + __u8 joint[3];
> + __u8 sign[2];
> + __u8 classes[2][10];
> + __u8 class0_bit[2];
> + __u8 bits[2][10];
> + __u8 class0_fr[2][2][3];
> + __u8 fr[2][3];
> + __u8 class0_hp[2];
> + __u8 hp[2];
> +};
> +
> +#define V4L2_CID_STATELESS_VP9_COMPRESSED_HDR_PROBS (V4L2_CID_CODEC_STATELESS_BASE + 301)
> +/**
> + * struct v4l2_ctrl_vp9_compressed_hdr_probs - VP9 probability updates control
> + * @tx8: TX 8x8 probability updates
> + * @tx16: TX 16x16 probability updates
> + * @tx32: TX 32x32 probability updates
> + * @coef: coefficient probability updates
> + * @skip: skip probability updates
> + * @inter_mode: inter mode probability updates
> + * @interp_filter: interpolation filter probability updates
> + * @is_inter: is inter-block probability updates
> + * @comp_mode: compound prediction mode probability updates
> + * @single_ref: single ref probability updates
> + * @comp_ref: compound ref probability updates
> + * @y_mode: Y prediction mode probability updates
> + * @uv_mode: UV prediction mode probability updates
> + * @partition: partition probability updates
> + * @mv: motion vector probability updates
> + *
> + * This structure holds the probabilities update as parsed in the compressed
> + * header (Spec 6.3). These values represent the value of probability update after
> + * being translated with inv_map_table[] (see 6.3.5). A value of zero in an array element
> + * means that there is no update of the relevant probability.
> + */
> +struct v4l2_ctrl_vp9_compressed_hdr_probs {
> + __u8 tx8[2][1];
> + __u8 tx16[2][2];
> + __u8 tx32[2][3];
> + __u8 coef[4][2][2][6][6][3];
> + __u8 skip[3];
> + __u8 inter_mode[7][3];
> + __u8 interp_filter[4][2];
> + __u8 is_inter[4];
> + __u8 comp_mode[5];
> + __u8 single_ref[5][2];
> + __u8 comp_ref[5];
> + __u8 y_mode[4][9];
> + __u8 uv_mode[10][9];
> + __u8 partition[16][3];
> +
> + struct v4l2_vp9_mv_compressed_hdr_probs mv;
> +};
> +
> /* MPEG-compression definitions kept for backwards compatibility */
> #ifndef __KERNEL__
> #define V4L2_CTRL_CLASS_MPEG V4L2_CTRL_CLASS_CODEC
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index 58392dcd3bf5..4abe4362519e 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -703,6 +703,7 @@ struct v4l2_pix_format {
> #define V4L2_PIX_FMT_VP8 v4l2_fourcc('V', 'P', '8', '0') /* VP8 */
> #define V4L2_PIX_FMT_VP8_FRAME v4l2_fourcc('V', 'P', '8', 'F') /* VP8 parsed frame */
> #define V4L2_PIX_FMT_VP9 v4l2_fourcc('V', 'P', '9', '0') /* VP9 */
> +#define V4L2_PIX_FMT_VP9_FRAME v4l2_fourcc('V', 'P', '9', 'F') /* VP9 parsed frame */
> #define V4L2_PIX_FMT_HEVC v4l2_fourcc('H', 'E', 'V', 'C') /* HEVC aka H.265 */
> #define V4L2_PIX_FMT_FWHT v4l2_fourcc('F', 'W', 'H', 'T') /* Fast Walsh Hadamard Transform (vicodec) */
> #define V4L2_PIX_FMT_FWHT_STATELESS v4l2_fourcc('S', 'F', 'W', 'H') /* Stateless FWHT (vicodec) */
> @@ -1755,6 +1756,8 @@ struct v4l2_ext_control {
> struct v4l2_ctrl_mpeg2_sequence __user *p_mpeg2_sequence;
> struct v4l2_ctrl_mpeg2_picture __user *p_mpeg2_picture;
> struct v4l2_ctrl_mpeg2_quantisation __user *p_mpeg2_quantisation;
> + struct v4l2_ctrl_vp9_compressed_hdr_probs __user *p_vp9_compressed_hdr_probs;
> + struct v4l2_ctrl_vp9_frame __user *p_vp9_frame;
> void __user *ptr;
> };
> } __attribute__ ((packed));
> @@ -1819,6 +1822,9 @@ enum v4l2_ctrl_type {
> V4L2_CTRL_TYPE_MPEG2_QUANTISATION = 0x0250,
> V4L2_CTRL_TYPE_MPEG2_SEQUENCE = 0x0251,
> V4L2_CTRL_TYPE_MPEG2_PICTURE = 0x0252,
> +
> + V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR_PROBS = 0x0260,
> + V4L2_CTRL_TYPE_VP9_FRAME = 0x0261,
> };
>
> /* Used in the VIDIOC_QUERYCTRL ioctl for querying controls */