Re: [PATCH RESEND v7 1/2] media: uapi: Add H264 low-level decoder API compound controls.
From: Hans Verkuil
Date: Thu Apr 04 2019 - 08:36:26 EST
(Apologies if this arrives twice)
On 4/4/19 2:26 PM, Maxime Ripard wrote:
> From: Pawel Osciak <posciak@xxxxxxxxxxxx>
>
> Stateless video codecs will require both the H264 metadata and slices in
> order to be able to decode frames.
>
> This introduces the definitions for a new pixel format for H264 slices that
> have been parsed, as well as the structures used to pass the metadata from
> the userspace to the kernel.
>
> Reviewed-by: Tomasz Figa <tfiga@xxxxxxxxxxxx>
> Signed-off-by: Pawel Osciak <posciak@xxxxxxxxxxxx>
> Signed-off-by: Guenter Roeck <groeck@xxxxxxxxxxxx>
> Co-developed-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxx>
> Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxx>
> ---
> Documentation/media/uapi/v4l/biblio.rst | 9 +-
> Documentation/media/uapi/v4l/ext-ctrls-codec.rst | 569 ++++++++++++++-
> Documentation/media/uapi/v4l/pixfmt-compressed.rst | 19 +-
> Documentation/media/uapi/v4l/vidioc-queryctrl.rst | 30 +-
> Documentation/media/videodev2.h.rst.exceptions | 5 +-
> drivers/media/v4l2-core/v4l2-ctrls.c | 42 +-
> drivers/media/v4l2-core/v4l2-ioctl.c | 1 +-
> include/media/h264-ctrls.h | 192 +++++-
> include/media/v4l2-ctrls.h | 13 +-
> include/uapi/linux/videodev2.h | 1 +-
> 10 files changed, 880 insertions(+), 1 deletion(-)
> create mode 100644 include/media/h264-ctrls.h
>
> diff --git a/Documentation/media/uapi/v4l/biblio.rst b/Documentation/media/uapi/v4l/biblio.rst
> index ec33768c055e..8f4eb8823d82 100644
> --- a/Documentation/media/uapi/v4l/biblio.rst
> +++ b/Documentation/media/uapi/v4l/biblio.rst
> @@ -122,6 +122,15 @@ ITU BT.1119
>
> :author: International Telecommunication Union (http://www.itu.ch)
>
> +.. _h264:
> +
> +ITU-T Rec. H.264 Specification (04/2017 Edition)
> +================================================
> +
> +:title: ITU-T Recommendation H.264 "Advanced Video Coding for Generic Audiovisual Services"
> +
> +:author: International Telecommunication Union (http://www.itu.ch)
> +
> .. _jfif:
>
> JFIF
> diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
> index 67a122339c0e..1285bfec7d3d 100644
> --- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
> +++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
> @@ -1371,6 +1371,575 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
> - Layer number
>
>
> +.. _v4l2-mpeg-h264:
> +
> +``V4L2_CID_MPEG_VIDEO_H264_SPS (struct)``
> + Specifies the sequence parameter set (as extracted from the
> + bitstream) for the associated H264 slice data. This includes the
> + necessary parameters for configuring a stateless hardware decoding
> + pipeline for H264. The bitstream parameters are defined according
> + to :ref:`h264`, section 7.4.2.1.1 "Sequence Parameter Set Data
> + Semantics". For further documentation, refer to the above
> + specification, unless there is an explicit comment stating
> + otherwise.
> +
> + .. note::
> +
> + This compound control is not yet part of the public kernel API and
> + it is expected to change.
> +
> +.. c:type:: v4l2_ctrl_h264_sps
> +
> +.. cssclass:: longtable
> +
> +.. flat-table:: struct v4l2_ctrl_h264_sps
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - __u8
> + - ``profile_idc``
> + -
> + * - __u8
> + - ``constraint_set_flags``
> + - See :ref:`Sequence Parameter Set Constraints Set Flags <h264_sps_constraints_set_flags>`
> + * - __u8
> + - ``level_idc``
> + -
> + * - __u8
> + - ``seq_parameter_set_id``
> + -
> + * - __u8
> + - ``chroma_format_idc``
> + -
> + * - __u8
> + - ``bit_depth_luma_minus8``
> + -
> + * - __u8
> + - ``bit_depth_chroma_minus8``
> + -
> + * - __u8
> + - ``log2_max_frame_num_minus4``
> + -
> + * - __u8
> + - ``pic_order_cnt_type``
> + -
> + * - __u8
> + - ``log2_max_pic_order_cnt_lsb_minus4``
> + -
> + * - __u8
> + - ``max_num_ref_frames``
> + -
> + * - __u8
> + - ``num_ref_frames_in_pic_order_cnt_cycle``
> + -
> + * - __s32
> + - ``offset_for_ref_frame[255]``
> + -
> + * - __s32
> + - ``offset_for_non_ref_pic``
> + -
> + * - __s32
> + - ``offset_for_top_to_bottom_field``
> + -
> + * - __u16
> + - ``pic_width_in_mbs_minus1``
> + -
> + * - __u16
> + - ``pic_height_in_map_units_minus1``
> + -
> + * - __u32
> + - ``flags``
> + - See :ref:`Sequence Parameter Set Flags <h264_sps_flags>`
> +
> +.. _h264_sps_constraints_set_flags:
> +
> +``Sequence Parameter Set Constraints Set Flags``
> +
> +.. cssclass:: longtable
> +
> +.. flat-table::
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - ``V4L2_H264_SPS_CONSTRAINT_SET0_FLAG``
> + - 0x00000001
> + -
> + * - ``V4L2_H264_SPS_CONSTRAINT_SET1_FLAG``
> + - 0x00000002
> + -
> + * - ``V4L2_H264_SPS_CONSTRAINT_SET2_FLAG``
> + - 0x00000004
> + -
> + * - ``V4L2_H264_SPS_CONSTRAINT_SET3_FLAG``
> + - 0x00000008
> + -
> + * - ``V4L2_H264_SPS_CONSTRAINT_SET4_FLAG``
> + - 0x00000010
> + -
> + * - ``V4L2_H264_SPS_CONSTRAINT_SET5_FLAG``
> + - 0x00000020
> + -
> +
> +.. _h264_sps_flags:
> +
> +``Sequence Parameter Set Flags``
> +
> +.. cssclass:: longtable
> +
> +.. flat-table::
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - ``V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE``
> + - 0x00000001
> + -
> + * - ``V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS``
> + - 0x00000002
> + -
> + * - ``V4L2_H264_SPS_FLAG_DELTA_PIC_ORDER_ALWAYS_ZERO``
> + - 0x00000004
> + -
> + * - ``V4L2_H264_SPS_FLAG_GAPS_IN_FRAME_NUM_VALUE_ALLOWED``
> + - 0x00000008
> + -
> + * - ``V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY``
> + - 0x00000010
> + -
> + * - ``V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD``
> + - 0x00000020
> + -
> + * - ``V4L2_H264_SPS_FLAG_DIRECT_8X8_INFERENCE``
> + - 0x00000040
> + -
> +
> +``V4L2_CID_MPEG_VIDEO_H264_PPS (struct)``
> + Specifies the picture parameter set (as extracted from the
> + bitstream) for the associated H264 slice data. This includes the
> + necessary parameters for configuring a stateless hardware decoding
> + pipeline for H264. The bitstream parameters are defined according
> + to :ref:`h264`, section 7.4.2.2 "Picture Parameter Set RBSP
> + Semantics". For further documentation, refer to the above
> + specification, unless there is an explicit comment stating
> + otherwise.
> +
> + .. note::
> +
> + This compound control is not yet part of the public kernel API and
> + it is expected to change.
> +
> +.. c:type:: v4l2_ctrl_h264_pps
> +
> +.. cssclass:: longtable
> +
> +.. flat-table:: struct v4l2_ctrl_h264_pps
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - __u8
> + - ``pic_parameter_set_id``
> + -
> + * - __u8
> + - ``seq_parameter_set_id``
> + -
> + * - __u8
> + - ``num_slice_groups_minus1``
> + -
> + * - __u8
> + - ``num_ref_idx_l0_default_active_minus1``
> + -
> + * - __u8
> + - ``num_ref_idx_l1_default_active_minus1``
> + -
> + * - __u8
> + - ``weighted_bipred_idc``
> + -
> + * - __s8
> + - ``pic_init_qp_minus26``
> + -
> + * - __s8
> + - ``pic_init_qs_minus26``
> + -
> + * - __s8
> + - ``chroma_qp_index_offset``
> + -
> + * - __s8
> + - ``second_chroma_qp_index_offset``
> + -
> + * - __u16
> + - ``flags``
> + - See :ref:`Picture Parameter Set Flags <h264_pps_flags>`
> +
> +.. _h264_pps_flags:
> +
> +``Picture Parameter Set Flags``
> +
> +.. cssclass:: longtable
> +
> +.. flat-table::
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - ``V4L2_H264_PPS_FLAG_ENTROPY_CODING_MODE``
> + - 0x00000001
> + -
> + * - ``V4L2_H264_PPS_FLAG_BOTTOM_FIELD_PIC_ORDER_IN_FRAME_PRESENT``
> + - 0x00000002
> + -
> + * - ``V4L2_H264_PPS_FLAG_WEIGHTED_PRED``
> + - 0x00000004
> + -
> + * - ``V4L2_H264_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT``
> + - 0x00000008
> + -
> + * - ``V4L2_H264_PPS_FLAG_CONSTRAINED_INTRA_PRED``
> + - 0x00000010
> + -
> + * - ``V4L2_H264_PPS_FLAG_REDUNDANT_PIC_CNT_PRESENT``
> + - 0x00000020
> + -
> + * - ``V4L2_H264_PPS_FLAG_TRANSFORM_8X8_MODE``
> + - 0x00000040
> + -
> + * - ``V4L2_H264_PPS_FLAG_PIC_SCALING_MATRIX_PRESENT``
> + - 0x00000080
> + -
> +
> +``V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX (struct)``
> + Specifies the scaling matrix (as extracted from the bitstream) for
> + the associated H264 slice data. The bitstream parameters are
> + defined according to :ref:`h264`, section 7.4.2.1.1.1 "Scaling
> + List Semantics".For further documentation, refer to the above
> + specification, unless there is an explicit comment stating
> + otherwise.
> +
> + .. note::
> +
> + This compound control is not yet part of the public kernel API and
> + it is expected to change.
> +
> +.. c:type:: v4l2_ctrl_h264_scaling_matrix
> +
> +.. cssclass:: longtable
> +
> +.. flat-table:: struct v4l2_ctrl_h264_scaling_matrix
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - __u8
> + - ``scaling_list_4x4[6][16]``
> + -
> + * - __u8
> + - ``scaling_list_8x8[6][64]``
> + -
> +
> +``V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS (struct)``
> + Specifies the slice parameters (as extracted from the bitstream)
> + for the associated H264 slice data. This includes the necessary
> + parameters for configuring a stateless hardware decoding pipeline
> + for H264. The bitstream parameters are defined according to
> + :ref:`h264`, section 7.4.3 "Slice Header Semantics". For further
> + documentation, refer to the above specification, unless there is
> + an explicit comment stating otherwise.
> +
> + .. note::
> +
> + This compound control is not yet part of the public kernel API
> + and it is expected to change.
> +
> + This structure is expected to be passed as an array, with one
> + entry for each slice included in the bitstream buffer.
> +
> +.. c:type:: v4l2_ctrl_h264_slice_param
The control is called _PARAMS, yet the struct is called _param.
Same for DECODE_PARAMS.
Can you rename the structs and anything else that has the same problem to _params?
This mismatch is confusing. MPEG2 uses _params, and I think we should do the same
for H.264.
Sorry, I hadn't noticed this in earlier reviews.
Regards,
Hans
> +
> +.. cssclass:: longtable
> +
> +.. flat-table:: struct v4l2_ctrl_h264_slice_param
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - __u32
> + - ``size``
> + -
> + * - __u32
> + - ``header_bit_size``
> + -
> + * - __u16
> + - ``first_mb_in_slice``
> + -
> + * - __u8
> + - ``slice_type``
> + -
> + * - __u8
> + - ``pic_parameter_set_id``
> + -
> + * - __u8
> + - ``colour_plane_id``
> + -
> + * - __u8
> + - ``redundant_pic_cnt``
> + -
> + * - __u16
> + - ``frame_num``
> + -
> + * - __u16
> + - ``idr_pic_id``
> + -
> + * - __u16
> + - ``pic_order_cnt_lsb``
> + -
> + * - __s32
> + - ``delta_pic_order_cnt_bottom``
> + -
> + * - __s32
> + - ``delta_pic_order_cnt0``
> + -
> + * - __s32
> + - ``delta_pic_order_cnt1``
> + -
> + * - struct :c:type:`v4l2_h264_pred_weight_table`
> + - ``pred_weight_table``
> + -
> + * - __u32
> + - ``dec_ref_pic_marking_bit_size``
> + -
> + * - __u32
> + - ``pic_order_cnt_bit_size``
> + -
> + * - __u8
> + - ``cabac_init_idc``
> + -
> + * - __s8
> + - ``slice_qp_delta``
> + -
> + * - __s8
> + - ``slice_qs_delta``
> + -
> + * - __u8
> + - ``disable_deblocking_filter_idc``
> + -
> + * - __s8
> + - ``slice_alpha_c0_offset_div2``
> + -
> + * - __s8
> + - ``slice_beta_offset_div2``
> + -
> + * - __u8
> + - ``num_ref_idx_l0_active_minus1``
> + -
> + * - __u8
> + - ``num_ref_idx_l1_active_minus1``
> + -
> + * - __u32
> + - ``slice_group_change_cycle``
> + -
> + * - __u8
> + - ``ref_pic_list0[32]``
> + - Reference picture list after applying the per-slice modifications
> + * - __u8
> + - ``ref_pic_list1[32]``
> + - Reference picture list after applying the per-slice modifications
> + * - __u32
> + - ``flags``
> + - See :ref:`Slice Parameter Flags <h264_slice_flags>`
> +
> +.. _h264_slice_flags:
> +
> +``Slice Parameter Set Flags``
> +
> +.. cssclass:: longtable
> +
> +.. flat-table::
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - ``V4L2_H264_SLICE_FLAG_FIELD_PIC``
> + - 0x00000001
> + -
> + * - ``V4L2_H264_SLICE_FLAG_BOTTOM_FIELD``
> + - 0x00000002
> + -
> + * - ``V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED``
> + - 0x00000004
> + -
> + * - ``V4L2_H264_SLICE_FLAG_SP_FOR_SWITCH``
> + - 0x00000008
> + -
> +
> +``Prediction Weight Table``
> +
> + The bitstream parameters are defined according to :ref:`h264`,
> + section 7.4.3.2 "Prediction Weight Table Semantics". For further
> + documentation, refer to the above specification, unless there is
> + an explicit comment stating otherwise.
> +
> +.. c:type:: v4l2_h264_pred_weight_table
> +
> +.. cssclass:: longtable
> +
> +.. flat-table:: struct v4l2_h264_pred_weight_table
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - __u16
> + - ``luma_log2_weight_denom``
> + -
> + * - __u16
> + - ``chroma_log2_weight_denom``
> + -
> + * - struct :c:type:`v4l2_h264_weight_factors`
> + - ``weight_factors[2]``
> + - The weight factors at index 0 are the weight factors for the reference
> + list 0, the one at index 1 for the reference list 1.
> +
> +.. c:type:: v4l2_h264_weight_factors
> +
> +.. cssclass:: longtable
> +
> +.. flat-table:: struct v4l2_h264_weight_factors
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - __s16
> + - ``luma_weight[32]``
> + -
> + * - __s16
> + - ``luma_offset[32]``
> + -
> + * - __s16
> + - ``chroma_weight[32][2]``
> + -
> + * - __s16
> + - ``chroma_offset[32][2]``
> + -
> +
> +``V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS (struct)``
> + Specifies the decode parameters (as extracted from the bitstream)
> + for the associated H264 slice data. This includes the necessary
> + parameters for configuring a stateless hardware decoding pipeline
> + for H264. The bitstream parameters are defined according to
> + :ref:`h264`. For further documentation, refer to the above
> + specification, unless there is an explicit comment stating
> + otherwise.
> +
> + .. note::
> +
> + This compound control is not yet part of the public kernel API and
> + it is expected to change.
> +
> +.. c:type:: v4l2_ctrl_h264_decode_param
> +
> +.. cssclass:: longtable
> +
> +.. flat-table:: struct v4l2_ctrl_h264_decode_param
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - __u32
> + - ``num_slices``
> + - Number of slices needed to decode the current frame
> + * - __u32
> + - ``nal_ref_idc``
> + - NAL reference ID value coming from the NAL Unit header
> + * - __u8
> + - ``ref_pic_list_p0[32]``
> + - Backward reference list used by P-frames in the original bitstream order
> + * - __u8
> + - ``ref_pic_list_b0[32]``
> + - Backward reference list used by B-frames in the original bitstream order
> + * - __u8
> + - ``ref_pic_list_b1[32]``
> + - Forward reference list used by B-frames in the original bitstream order
> + * - __s32
> + - ``top_field_order_cnt``
> + - Picture Order Count for the coded top field
> + * - __s32
> + - ``bottom_field_order_cnt``
> + - Picture Order Count for the coded bottom field
> + * - __u32
> + - ``flags``
> + - See :ref:`Decode Parameters Flags <h264_decode_params_flags>`
> + * - struct :c:type:`v4l2_h264_dpb_entry`
> + - ``dpb[16]``
> + -
> +
> +.. _h264_decode_params_flags:
> +
> +``Decode Parameters Flags``
> +
> +.. cssclass:: longtable
> +
> +.. flat-table::
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - ``V4L2_H264_DECODE_PARAM_FLAG_IDR_PIC``
> + - 0x00000001
> + - That picture is an IDR picture
> +
> +.. c:type:: v4l2_h264_dpb_entry
> +
> +.. cssclass:: longtable
> +
> +.. flat-table:: struct v4l2_h264_dpb_entry
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - __u64
> + - ``reference_ts``
> + - Timestamp of the V4L2 capture buffer to use as reference, used
> + with B-coded and P-coded frames. 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.
> + * - __u16
> + - ``frame_num``
> + -
> + * - __u16
> + - ``pic_num``
> + -
> + * - __s32
> + - ``top_field_order_cnt``
> + -
> + * - __s32
> + - ``bottom_field_order_cnt``
> + -
> + * - __u32
> + - ``flags``
> + - See :ref:`DPB Entry Flags <h264_dpb_flags>`
> +
> +.. _h264_dpb_flags:
> +
> +``DPB Entries Flags``
> +
> +.. cssclass:: longtable
> +
> +.. flat-table::
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - ``V4L2_H264_DPB_ENTRY_FLAG_VALID``
> + - 0x00000001
> + - The DPB entry is valid and should be considered
> + * - ``V4L2_H264_DPB_ENTRY_FLAG_ACTIVE``
> + - 0x00000002
> + - The DPB entry is currently being used as a reference frame
> + * - ``V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM``
> + - 0x00000004
> + - The DPB entry is a long term reference frame
>
> .. _v4l2-mpeg-mpeg2:
>
> diff --git a/Documentation/media/uapi/v4l/pixfmt-compressed.rst b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
> index 6c961cfb74da..ea0a8a68759b 100644
> --- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst
> +++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
> @@ -52,6 +52,25 @@ Compressed Formats
> - ``V4L2_PIX_FMT_H264_MVC``
> - 'M264'
> - H264 MVC video elementary stream.
> + * .. _V4L2-PIX-FMT-H264-SLICE:
> +
> + - ``V4L2_PIX_FMT_H264_SLICE_RAW``
> + - 'S264'
> + - H264 parsed slice data, as extracted from the H264 bitstream.
> + This format is adapted for stateless video decoders that
> + implement an H264 pipeline (using the :ref:`codec` and
> + :ref:`media-request-api`). Metadata associated with the frame
> + to decode are required to be passed through the
> + ``V4L2_CID_MPEG_VIDEO_H264_SPS``,
> + ``V4L2_CID_MPEG_VIDEO_H264_PPS``,
> + ``V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX``,
> + ``V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS`` and
> + ``V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS`` controls. See the
> + :ref:`associated Codec Control IDs <v4l2-mpeg-h264>`.
> + 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-H263:
>
> - ``V4L2_PIX_FMT_H263``
> diff --git a/Documentation/media/uapi/v4l/vidioc-queryctrl.rst b/Documentation/media/uapi/v4l/vidioc-queryctrl.rst
> index f824162d0ea9..bf29dc5b9758 100644
> --- a/Documentation/media/uapi/v4l/vidioc-queryctrl.rst
> +++ b/Documentation/media/uapi/v4l/vidioc-queryctrl.rst
> @@ -443,6 +443,36 @@ See also the examples in :ref:`control`.
> - n/a
> - A struct :c:type:`v4l2_ctrl_mpeg2_quantization`, containing MPEG-2
> quantization matrices for stateless video decoders.
> + * - ``V4L2_CTRL_TYPE_H264_SPS``
> + - n/a
> + - n/a
> + - n/a
> + - A struct :c:type:`v4l2_ctrl_h264_sps`, containing H264
> + sequence parameters for stateless video decoders.
> + * - ``V4L2_CTRL_TYPE_H264_PPS``
> + - n/a
> + - n/a
> + - n/a
> + - A struct :c:type:`v4l2_ctrl_h264_pps`, containing H264
> + picture parameters for stateless video decoders.
> + * - ``V4L2_CTRL_TYPE_H264_SCALING_MATRIX``
> + - n/a
> + - n/a
> + - n/a
> + - A struct :c:type:`v4l2_ctrl_h264_scaling_matrix`, containing H264
> + scaling matrices for stateless video decoders.
> + * - ``V4L2_CTRL_TYPE_H264_SLICE_PARAMS``
> + - n/a
> + - n/a
> + - n/a
> + - A struct :c:type:`v4l2_ctrl_h264_slice_param`, containing H264
> + slice parameters for stateless video decoders.
> + * - ``V4L2_CTRL_TYPE_H264_DECODE_PARAMS``
> + - n/a
> + - n/a
> + - n/a
> + - A struct :c:type:`v4l2_ctrl_h264_decode_param`, containing H264
> + decode parameters for stateless video decoders.
>
> .. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
>
> diff --git a/Documentation/media/videodev2.h.rst.exceptions b/Documentation/media/videodev2.h.rst.exceptions
> index 64d348e67df9..55cbe324b9fc 100644
> --- a/Documentation/media/videodev2.h.rst.exceptions
> +++ b/Documentation/media/videodev2.h.rst.exceptions
> @@ -136,6 +136,11 @@ replace symbol V4L2_CTRL_TYPE_U32 :c:type:`v4l2_ctrl_type`
> replace symbol V4L2_CTRL_TYPE_U8 :c:type:`v4l2_ctrl_type`
> replace symbol V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS :c:type:`v4l2_ctrl_type`
> replace symbol V4L2_CTRL_TYPE_MPEG2_QUANTIZATION :c:type:`v4l2_ctrl_type`
> +replace symbol V4L2_CTRL_TYPE_H264_SPS :c:type:`v4l2_ctrl_type`
> +replace symbol V4L2_CTRL_TYPE_H264_PPS :c:type:`v4l2_ctrl_type`
> +replace symbol V4L2_CTRL_TYPE_H264_SCALING_MATRIX :c:type:`v4l2_ctrl_type`
> +replace symbol V4L2_CTRL_TYPE_H264_SLICE_PARAMS :c:type:`v4l2_ctrl_type`
> +replace symbol V4L2_CTRL_TYPE_H264_DECODE_PARAMS :c:type:`v4l2_ctrl_type`
>
> # V4L2 capability defines
> replace define V4L2_CAP_VIDEO_CAPTURE device-capabilities
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
> index b1ae2e555c68..626bfcee3d55 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
> @@ -828,6 +828,11 @@ const char *v4l2_ctrl_get_name(u32 id)
> case V4L2_CID_MPEG_VIDEO_H264_CONSTRAINED_INTRA_PREDICTION:
> return "H264 Constrained Intra Pred";
> case V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET: return "H264 Chroma QP Index Offset";
> + case V4L2_CID_MPEG_VIDEO_H264_SPS: return "H264 Sequence Parameter Set";
> + case V4L2_CID_MPEG_VIDEO_H264_PPS: return "H264 Picture Parameter Set";
> + case V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX: return "H264 Scaling Matrix";
> + case V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS: return "H264 Slice Parameters";
> + case V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS: return "H264 Decode Parameters";
> case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value";
> case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value";
> case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value";
> @@ -1309,6 +1314,21 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
> case V4L2_CID_MPEG_VIDEO_FWHT_PARAMS:
> *type = V4L2_CTRL_TYPE_FWHT_PARAMS;
> break;
> + case V4L2_CID_MPEG_VIDEO_H264_SPS:
> + *type = V4L2_CTRL_TYPE_H264_SPS;
> + break;
> + case V4L2_CID_MPEG_VIDEO_H264_PPS:
> + *type = V4L2_CTRL_TYPE_H264_PPS;
> + break;
> + case V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX:
> + *type = V4L2_CTRL_TYPE_H264_SCALING_MATRIX;
> + break;
> + case V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS:
> + *type = V4L2_CTRL_TYPE_H264_SLICE_PARAMS;
> + break;
> + case V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS:
> + *type = V4L2_CTRL_TYPE_H264_DECODE_PARAMS;
> + break;
> default:
> *type = V4L2_CTRL_TYPE_INTEGER;
> break;
> @@ -1678,6 +1698,13 @@ static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
> case V4L2_CTRL_TYPE_FWHT_PARAMS:
> return 0;
>
> + case V4L2_CTRL_TYPE_H264_SPS:
> + case V4L2_CTRL_TYPE_H264_PPS:
> + case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
> + case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
> + case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
> + return 0;
> +
> default:
> return -EINVAL;
> }
> @@ -2261,6 +2288,21 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
> case V4L2_CTRL_TYPE_FWHT_PARAMS:
> elem_size = sizeof(struct v4l2_ctrl_fwht_params);
> break;
> + case V4L2_CTRL_TYPE_H264_SPS:
> + elem_size = sizeof(struct v4l2_ctrl_h264_sps);
> + break;
> + case V4L2_CTRL_TYPE_H264_PPS:
> + elem_size = sizeof(struct v4l2_ctrl_h264_pps);
> + break;
> + case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
> + elem_size = sizeof(struct v4l2_ctrl_h264_scaling_matrix);
> + break;
> + case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
> + elem_size = sizeof(struct v4l2_ctrl_h264_slice_param);
> + break;
> + case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
> + elem_size = sizeof(struct v4l2_ctrl_h264_decode_param);
> + break;
> default:
> if (type < V4L2_CTRL_COMPOUND_TYPES)
> elem_size = sizeof(s32);
> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
> index ac87c3e37280..f6e1254064d2 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -1325,6 +1325,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
> case V4L2_PIX_FMT_H264: descr = "H.264"; break;
> case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break;
> case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break;
> + case V4L2_PIX_FMT_H264_SLICE_RAW: descr = "H.264 Parsed Slice Data"; break;
> case V4L2_PIX_FMT_H263: descr = "H.263"; break;
> case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break;
> case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break;
> diff --git a/include/media/h264-ctrls.h b/include/media/h264-ctrls.h
> new file mode 100644
> index 000000000000..a086ed6ee91f
> --- /dev/null
> +++ b/include/media/h264-ctrls.h
> @@ -0,0 +1,192 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * These are the H.264 state controls for use with stateless H.264
> + * codec drivers.
> + *
> + * It turns out that these structs are not stable yet and will undergo
> + * more changes. So keep them private until they are stable and ready to
> + * become part of the official public API.
> + */
> +
> +#ifndef _H264_CTRLS_H_
> +#define _H264_CTRLS_H_
> +
> +/*
> + * This is put insanely high to avoid conflicting with controls that
> + * would be added during the phase where those controls are not
> + * stable. It should be fixed eventually.
> + */
> +#define V4L2_CID_MPEG_VIDEO_H264_SPS (V4L2_CID_MPEG_BASE+1000)
> +#define V4L2_CID_MPEG_VIDEO_H264_PPS (V4L2_CID_MPEG_BASE+1001)
> +#define V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX (V4L2_CID_MPEG_BASE+1002)
> +#define V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS (V4L2_CID_MPEG_BASE+1003)
> +#define V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS (V4L2_CID_MPEG_BASE+1004)
> +
> +/* enum v4l2_ctrl_type type values */
> +#define V4L2_CTRL_TYPE_H264_SPS 0x0110
> +#define V4L2_CTRL_TYPE_H264_PPS 0x0111
> +#define V4L2_CTRL_TYPE_H264_SCALING_MATRIX 0x0112
> +#define V4L2_CTRL_TYPE_H264_SLICE_PARAMS 0x0113
> +#define V4L2_CTRL_TYPE_H264_DECODE_PARAMS 0x0114
> +
> +#define V4L2_H264_SPS_CONSTRAINT_SET0_FLAG 0x01
> +#define V4L2_H264_SPS_CONSTRAINT_SET1_FLAG 0x02
> +#define V4L2_H264_SPS_CONSTRAINT_SET2_FLAG 0x04
> +#define V4L2_H264_SPS_CONSTRAINT_SET3_FLAG 0x08
> +#define V4L2_H264_SPS_CONSTRAINT_SET4_FLAG 0x10
> +#define V4L2_H264_SPS_CONSTRAINT_SET5_FLAG 0x20
> +
> +#define V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE 0x01
> +#define V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS 0x02
> +#define V4L2_H264_SPS_FLAG_DELTA_PIC_ORDER_ALWAYS_ZERO 0x04
> +#define V4L2_H264_SPS_FLAG_GAPS_IN_FRAME_NUM_VALUE_ALLOWED 0x08
> +#define V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY 0x10
> +#define V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD 0x20
> +#define V4L2_H264_SPS_FLAG_DIRECT_8X8_INFERENCE 0x40
> +
> +struct v4l2_ctrl_h264_sps {
> + __u8 profile_idc;
> + __u8 constraint_set_flags;
> + __u8 level_idc;
> + __u8 seq_parameter_set_id;
> + __u8 chroma_format_idc;
> + __u8 bit_depth_luma_minus8;
> + __u8 bit_depth_chroma_minus8;
> + __u8 log2_max_frame_num_minus4;
> + __u8 pic_order_cnt_type;
> + __u8 log2_max_pic_order_cnt_lsb_minus4;
> + __u8 max_num_ref_frames;
> + __u8 num_ref_frames_in_pic_order_cnt_cycle;
> + __s32 offset_for_ref_frame[255];
> + __s32 offset_for_non_ref_pic;
> + __s32 offset_for_top_to_bottom_field;
> + __u16 pic_width_in_mbs_minus1;
> + __u16 pic_height_in_map_units_minus1;
> + __u32 flags;
> +};
> +
> +#define V4L2_H264_PPS_FLAG_ENTROPY_CODING_MODE 0x0001
> +#define V4L2_H264_PPS_FLAG_BOTTOM_FIELD_PIC_ORDER_IN_FRAME_PRESENT 0x0002
> +#define V4L2_H264_PPS_FLAG_WEIGHTED_PRED 0x0004
> +#define V4L2_H264_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT 0x0008
> +#define V4L2_H264_PPS_FLAG_CONSTRAINED_INTRA_PRED 0x0010
> +#define V4L2_H264_PPS_FLAG_REDUNDANT_PIC_CNT_PRESENT 0x0020
> +#define V4L2_H264_PPS_FLAG_TRANSFORM_8X8_MODE 0x0040
> +#define V4L2_H264_PPS_FLAG_PIC_SCALING_MATRIX_PRESENT 0x0080
> +
> +struct v4l2_ctrl_h264_pps {
> + __u8 pic_parameter_set_id;
> + __u8 seq_parameter_set_id;
> + __u8 num_slice_groups_minus1;
> + __u8 num_ref_idx_l0_default_active_minus1;
> + __u8 num_ref_idx_l1_default_active_minus1;
> + __u8 weighted_bipred_idc;
> + __s8 pic_init_qp_minus26;
> + __s8 pic_init_qs_minus26;
> + __s8 chroma_qp_index_offset;
> + __s8 second_chroma_qp_index_offset;
> + __u16 flags;
> +};
> +
> +struct v4l2_ctrl_h264_scaling_matrix {
> + __u8 scaling_list_4x4[6][16];
> + __u8 scaling_list_8x8[6][64];
> +};
> +
> +struct v4l2_h264_weight_factors {
> + __s16 luma_weight[32];
> + __s16 luma_offset[32];
> + __s16 chroma_weight[32][2];
> + __s16 chroma_offset[32][2];
> +};
> +
> +struct v4l2_h264_pred_weight_table {
> + __u16 luma_log2_weight_denom;
> + __u16 chroma_log2_weight_denom;
> + struct v4l2_h264_weight_factors weight_factors[2];
> +};
> +
> +#define V4L2_H264_SLICE_TYPE_P 0
> +#define V4L2_H264_SLICE_TYPE_B 1
> +#define V4L2_H264_SLICE_TYPE_I 2
> +#define V4L2_H264_SLICE_TYPE_SP 3
> +#define V4L2_H264_SLICE_TYPE_SI 4
> +
> +#define V4L2_H264_SLICE_FLAG_FIELD_PIC 0x01
> +#define V4L2_H264_SLICE_FLAG_BOTTOM_FIELD 0x02
> +#define V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED 0x04
> +#define V4L2_H264_SLICE_FLAG_SP_FOR_SWITCH 0x08
> +
> +struct v4l2_ctrl_h264_slice_param {
> + /* Size in bytes, including header */
> + __u32 size;
> + /* Offset in bits to slice_data() from the beginning of this slice. */
> + __u32 header_bit_size;
> +
> + __u16 first_mb_in_slice;
> + __u8 slice_type;
> + __u8 pic_parameter_set_id;
> + __u8 colour_plane_id;
> + __u8 redundant_pic_cnt;
> + __u16 frame_num;
> + __u16 idr_pic_id;
> + __u16 pic_order_cnt_lsb;
> + __s32 delta_pic_order_cnt_bottom;
> + __s32 delta_pic_order_cnt0;
> + __s32 delta_pic_order_cnt1;
> +
> + struct v4l2_h264_pred_weight_table pred_weight_table;
> + /* Size in bits of dec_ref_pic_marking() syntax element. */
> + __u32 dec_ref_pic_marking_bit_size;
> + /* Size in bits of pic order count syntax. */
> + __u32 pic_order_cnt_bit_size;
> +
> + __u8 cabac_init_idc;
> + __s8 slice_qp_delta;
> + __s8 slice_qs_delta;
> + __u8 disable_deblocking_filter_idc;
> + __s8 slice_alpha_c0_offset_div2;
> + __s8 slice_beta_offset_div2;
> + __u8 num_ref_idx_l0_active_minus1;
> + __u8 num_ref_idx_l1_active_minus1;
> + __u32 slice_group_change_cycle;
> +
> + /*
> + * Entries on each list are indices into
> + * v4l2_ctrl_h264_decode_param.dpb[].
> + */
> + __u8 ref_pic_list0[32];
> + __u8 ref_pic_list1[32];
> +
> + __u32 flags;
> +};
> +
> +#define V4L2_H264_DPB_ENTRY_FLAG_VALID 0x01
> +#define V4L2_H264_DPB_ENTRY_FLAG_ACTIVE 0x02
> +#define V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM 0x04
> +
> +struct v4l2_h264_dpb_entry {
> + __u64 reference_ts;
> + __u16 frame_num;
> + __u16 pic_num;
> + /* Note that field is indicated by v4l2_buffer.field */
> + __s32 top_field_order_cnt;
> + __s32 bottom_field_order_cnt;
> + __u32 flags; /* V4L2_H264_DPB_ENTRY_FLAG_* */
> +};
> +
> +#define V4L2_H264_DECODE_PARAM_FLAG_IDR_PIC 0x01
> +
> +struct v4l2_ctrl_h264_decode_param {
> + struct v4l2_h264_dpb_entry dpb[16];
> + __u16 num_slices;
> + __u16 nal_ref_idc;
> + __u8 ref_pic_list_p0[32];
> + __u8 ref_pic_list_b0[32];
> + __u8 ref_pic_list_b1[32];
> + __s32 top_field_order_cnt;
> + __s32 bottom_field_order_cnt;
> + __u32 flags; /* V4L2_H264_DECODE_PARAM_FLAG_* */
> +};
> +
> +#endif
> diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
> index bd621cec65a5..4cd1ddbc6289 100644
> --- a/include/media/v4l2-ctrls.h
> +++ b/include/media/v4l2-ctrls.h
> @@ -23,11 +23,12 @@
> #include <media/media-request.h>
>
> /*
> - * Include the mpeg2 and fwht stateless codec compound control definitions.
> + * Include the stateless codec compound control definitions.
> * This will move to the public headers once this API is fully stable.
> */
> #include <media/mpeg2-ctrls.h>
> #include <media/fwht-ctrls.h>
> +#include <media/h264-ctrls.h>
>
> /* forward references */
> struct file;
> @@ -51,6 +52,11 @@ struct poll_table_struct;
> * @p_mpeg2_slice_params: Pointer to a MPEG2 slice parameters structure.
> * @p_mpeg2_quantization: Pointer to a MPEG2 quantization data structure.
> * @p_fwht_params: Pointer to a FWHT stateless parameters structure.
> + * @p_h264_sps: Pointer to a struct v4l2_ctrl_h264_sps.
> + * @p_h264_pps: Pointer to a struct v4l2_ctrl_h264_pps.
> + * @p_h264_scaling_matrix: Pointer to a struct v4l2_ctrl_h264_scaling_matrix.
> + * @p_h264_slice_param: Pointer to a struct v4l2_ctrl_h264_slice_param.
> + * @p_h264_decode_param: Pointer to a struct v4l2_ctrl_h264_decode_param.
> * @p: Pointer to a compound value.
> */
> union v4l2_ctrl_ptr {
> @@ -63,6 +69,11 @@ union v4l2_ctrl_ptr {
> struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
> struct v4l2_ctrl_mpeg2_quantization *p_mpeg2_quantization;
> struct v4l2_ctrl_fwht_params *p_fwht_params;
> + struct v4l2_ctrl_h264_sps *p_h264_sps;
> + struct v4l2_ctrl_h264_pps *p_h264_pps;
> + struct v4l2_ctrl_h264_scaling_matrix *p_h264_scaling_matrix;
> + struct v4l2_ctrl_h264_slice_param *p_h264_slice_param;
> + struct v4l2_ctrl_h264_decode_param *p_h264_decode_param;
> void *p;
> };
>
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index 496e6453450c..838732acdefc 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -657,6 +657,7 @@ struct v4l2_pix_format {
> #define V4L2_PIX_FMT_H264 v4l2_fourcc('H', '2', '6', '4') /* H264 with start codes */
> #define V4L2_PIX_FMT_H264_NO_SC v4l2_fourcc('A', 'V', 'C', '1') /* H264 without start codes */
> #define V4L2_PIX_FMT_H264_MVC v4l2_fourcc('M', '2', '6', '4') /* H264 MVC */
> +#define V4L2_PIX_FMT_H264_SLICE_RAW v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */
> #define V4L2_PIX_FMT_H263 v4l2_fourcc('H', '2', '6', '3') /* H263 */
> #define V4L2_PIX_FMT_MPEG1 v4l2_fourcc('M', 'P', 'G', '1') /* MPEG-1 ES */
> #define V4L2_PIX_FMT_MPEG2 v4l2_fourcc('M', 'P', 'G', '2') /* MPEG-2 ES */
>