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media: uapi: HEVC: Add documentation to uAPI structure

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Add kernel-doc documentation for all the HEVC structures.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Acked-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Tested-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Benjamin Gaignard 2022-07-08 17:21:47 +01:00 committed by Mauro Carvalho Chehab
parent 24aab5985f
commit 625e9ab479
2 changed files with 313 additions and 76 deletions
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168
Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
View File

@ -2695,70 +2695,76 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
of H.265 specifications.
* - __u16
- ``pic_width_in_luma_samples``
-
- Specifies the width of each decoded picture in units of luma samples.
* - __u16
- ``pic_height_in_luma_samples``
-
- Specifies the height of each decoded picture in units of luma samples.
* - __u8
- ``bit_depth_luma_minus8``
-
- This value plus 8 specifies the bit depth of the samples of the luma array.
* - __u8
- ``bit_depth_chroma_minus8``
-
- This value plus 8 specifies the bit depth of the samples of the chroma arrays.
* - __u8
- ``log2_max_pic_order_cnt_lsb_minus4``
-
- This value plus 4 specifies the value of the variable MaxPicOrderCntLsb.
* - __u8
- ``sps_max_dec_pic_buffering_minus1``
-
- This value plus 1 specifies the maximum required size of the decoded picture buffer for
the codec video sequence.
* - __u8
- ``sps_max_num_reorder_pics``
-
- Indicates the maximum allowed number of pictures.
* - __u8
- ``sps_max_latency_increase_plus1``
-
- Not equal to 0 is used to compute the value of SpsMaxLatencyPictures array.
* - __u8
- ``log2_min_luma_coding_block_size_minus3``
-
- This value plus 3 specifies the minimum luma coding block size.
* - __u8
- ``log2_diff_max_min_luma_coding_block_size``
-
- Specifies the difference between the maximum and minimum luma coding block size.
* - __u8
- ``log2_min_luma_transform_block_size_minus2``
-
- This value plus 2 specifies the minimum luma transform block size.
* - __u8
- ``log2_diff_max_min_luma_transform_block_size``
-
- Specifies the difference between the maximum and minimum luma transform block size.
* - __u8
- ``max_transform_hierarchy_depth_inter``
-
- Specifies the maximum hierarchy depth for transform units of coding units coded
in inter prediction mode.
* - __u8
- ``max_transform_hierarchy_depth_intra``
-
- Specifies the maximum hierarchy depth for transform units of coding units coded in
intra prediction mode.
* - __u8
- ``pcm_sample_bit_depth_luma_minus1``
-
- This value plus 1 specifies the number of bits used to represent each of PCM sample
values of the luma component.
* - __u8
- ``pcm_sample_bit_depth_chroma_minus1``
-
- This value plus 1 specifies the number of bits used to represent each of PCM sample
values of the chroma components.
* - __u8
- ``log2_min_pcm_luma_coding_block_size_minus3``
-
- This value plus 3 specifies the minimum size of coding blocks.
* - __u8
- ``log2_diff_max_min_pcm_luma_coding_block_size``
-
- Specifies the difference between the maximum and minimum size of coding blocks.
* - __u8
- ``num_short_term_ref_pic_sets``
-
- Specifies the number of st_ref_pic_set() syntax structures included in the SPS.
* - __u8
- ``num_long_term_ref_pics_sps``
-
- Specifies the number of candidate long-term reference pictures that are
specified in the SPS.
* - __u8
- ``chroma_format_idc``
-
- Specifies the chroma sampling.
* - __u8
- ``sps_max_sub_layers_minus1``
-
- This value plus 1 specifies the maximum number of temporal sub-layers.
* - __u64
- ``flags``
- See :ref:`Sequence Parameter Set Flags <hevc_sps_flags>`
@ -2837,46 +2843,52 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
- Identifies the PPS for reference by other syntax elements.
* - __u8
- ``num_extra_slice_header_bits``
-
- Specifies the number of extra slice header bits that are present
in the slice header RBSP for coded pictures referring to the PPS.
* - __u8
- ``num_ref_idx_l0_default_active_minus1``
- Specifies the inferred value of num_ref_idx_l0_active_minus1
- This value plus 1 specifies the inferred value of num_ref_idx_l0_active_minus1.
* - __u8
- ``num_ref_idx_l1_default_active_minus1``
- Specifies the inferred value of num_ref_idx_l1_active_minus1
- This value plus 1 specifies the inferred value of num_ref_idx_l1_active_minus1.
* - __s8
- ``init_qp_minus26``
-
- This value plus 26 specifies the initial value of SliceQp Y for each slice
referring to the PPS.
* - __u8
- ``diff_cu_qp_delta_depth``
-
- Specifies the difference between the luma coding tree block size
and the minimum luma coding block size of coding units that
convey cu_qp_delta_abs and cu_qp_delta_sign_flag.
* - __s8
- ``pps_cb_qp_offset``
-
- Specifies the offsets to the luma quantization parameter Cb.
* - __s8
- ``pps_cr_qp_offset``
-
- Specifies the offsets to the luma quantization parameter Cr.
* - __u8
- ``num_tile_columns_minus1``
-
- This value plus 1 specifies the number of tile columns partitioning the picture.
* - __u8
- ``num_tile_rows_minus1``
-
- This value plus 1 specifies the number of tile rows partitioning the picture.
* - __u8
- ``column_width_minus1[20]``
-
- Plus 1 specifies the width of each tile column in units of
coding tree blocks.
* - __u8
- ``row_height_minus1[22]``
-
- This value plus 1 specifies the height of each tile row in units of coding
tree blocks.
* - __s8
- ``pps_beta_offset_div2``
-
- Specifies the default deblocking parameter offsets for beta divided by 2.
* - __s8
- ``pps_tc_offset_div2``
-
- Specifies the default deblocking parameter offsets for tC divided by 2.
* - __u8
- ``log2_parallel_merge_level_minus2``
-
- Plus 2 specifies the value of the variable Log2ParMrgLevel.
* - __u8
- ``padding[4]``
- Applications and drivers must set this to zero.
@ -2998,10 +3010,10 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
- Offset (in bits) to the video data in the current slice data.
* - __u8
- ``nal_unit_type``
-
- Specifies the coding type of the slice (B, P or I).
* - __u8
- ``nuh_temporal_id_plus1``
-
- This value minus 1 specifies a temporal identifier for the NAL unit.
* - __u8
- ``slice_type``
-
@ -3009,52 +3021,56 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
V4L2_HEVC_SLICE_TYPE_B).
* - __u8
- ``colour_plane_id``
-
- Specifies the colour plane associated with the current slice.
* - __s32
- ``slice_pic_order_cnt``
-
- Specifies the picture order count.
* - __u8
- ``num_ref_idx_l0_active_minus1``
-
- This value plus 1 specifies the maximum reference index for
reference picture list 0 that may be used to decode the slice.
* - __u8
- ``num_ref_idx_l1_active_minus1``
-
- This value plus 1 specifies the maximum reference index for
reference picture list 1 that may be used to decode the slice.
* - __u8
- ``collocated_ref_idx``
-
- Specifies the reference index of the collocated picture used for
temporal motion vector prediction.
* - __u8
- ``five_minus_max_num_merge_cand``
-
- Specifies the maximum number of merging motion vector prediction
candidates supported in the slice subtracted from 5.
* - __s8
- ``slice_qp_delta``
-
- Specifies the initial value of QpY to be used for the coding blocks in the slice.
* - __s8
- ``slice_cb_qp_offset``
-
- Specifies a difference to be added to the value of pps_cb_qp_offset.
* - __s8
- ``slice_cr_qp_offset``
-
- Specifies a difference to be added to the value of pps_cr_qp_offset.
* - __s8
- ``slice_act_y_qp_offset``
-
- Screen content extension parameters.
* - __s8
- ``slice_act_cb_qp_offset``
-
- Screen content extension parameters.
* - __s8
- ``slice_act_cr_qp_offset``
-
- Screen content extension parameters.
* - __s8
- ``slice_beta_offset_div2``
-
- Specifies the deblocking parameter offsets for beta divided by 2.
* - __s8
- ``slice_tc_offset_div2``
-
- Specifies the deblocking parameter offsets for tC divided by 2.
* - __u8
- ``pic_struct``
-
- Indicates whether a picture should be displayed as a frame or as one or more fields.
* - __u32
- ``slice_segment_addr``
-
- Specifies the address of the first coding tree block in the slice segment.
* - __u8
- ``ref_idx_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
- The list of L0 reference elements as indices in the DPB.
@ -3219,11 +3235,9 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
- ``field_pic``
- Whether the reference is a field picture or a frame.
See :ref:`HEVC dpb field pic Flags <hevc_dpb_field_pic_flags>`
* - __u16
- ``pic_order_cnt[2]``
- The picture order count of the reference. Only the first element of the
array is used for frame pictures, while the first element identifies the
top field and the second the bottom field in field-coded pictures.
* - __s32
- ``pic_order_cnt_val``
- The picture order count of the current picture.
* - __u8
- ``padding[2]``
- Applications and drivers must set this to zero.
@ -3298,36 +3312,44 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``luma_log2_weight_denom``
-
* - __s8
- ``delta_chroma_log2_weight_denom``
-
* - __s8
- ``delta_luma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
-
- The difference of the weighting factor applied to the luma
prediction value for list 0.
* - __s8
- ``luma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
-
- The additive offset applied to the luma prediction value for list 0.
* - __s8
- ``delta_chroma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]``
-
- The difference of the weighting factor applied to the chroma
prediction value for list 0.
* - __s8
- ``chroma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]``
-
- The difference of the additive offset applied to the chroma
prediction values for list 0.
* - __s8
- ``delta_luma_weight_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
-
- The difference of the weighting factor applied to the luma
prediction value for list 1.
* - __s8
- ``luma_offset_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
-
- The additive offset applied to the luma prediction value for list 1.
* - __s8
- ``delta_chroma_weight_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]``
-
- The difference of the weighting factor applied to the chroma
prediction value for list 1.
* - __s8
- ``chroma_offset_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]``
-
- The difference of the additive offset applied to the chroma
prediction values for list 1.
* - __u8
- ``luma_log2_weight_denom``
- The base 2 logarithm of the denominator for all luma weighting
factors.
* - __s8
- ``delta_chroma_log2_weight_denom``
- The difference of the base 2 logarithm of the denominator for
all chroma weighting factors.
* - __u8
- ``padding[6]``
- Applications and drivers must set this to zero.

221
include/media/hevc-ctrls.h
View File

@ -55,9 +55,68 @@ enum v4l2_stateless_hevc_start_code {
#define V4L2_HEVC_SPS_FLAG_SPS_TEMPORAL_MVP_ENABLED (1ULL << 7)
#define V4L2_HEVC_SPS_FLAG_STRONG_INTRA_SMOOTHING_ENABLED (1ULL << 8)
/* The controls are not stable at the moment and will likely be reworked. */
/**
* struct v4l2_ctrl_hevc_sps - ITU-T Rec. H.265: Sequence parameter set
*
* @video_parameter_set_id: specifies the value of the
* vps_video_parameter_set_id of the active VPS
* @seq_parameter_set_id: provides an identifier for the SPS for
* reference by other syntax elements
* @pic_width_in_luma_samples: specifies the width of each decoded picture
* in units of luma samples
* @pic_height_in_luma_samples: specifies the height of each decoded picture
* in units of luma samples
* @bit_depth_luma_minus8: this value plus 8 specifies the bit depth of the
* samples of the luma array
* @bit_depth_chroma_minus8: this value plus 8 specifies the bit depth of the
* samples of the chroma arrays
* @log2_max_pic_order_cnt_lsb_minus4: this value plus 4 specifies the value
* of the variable MaxPicOrderCntLsb
* @sps_max_dec_pic_buffering_minus1: this value plus 1 specifies the maximum
* required size of the decoded picture
* buffer for the codec video sequence
* @sps_max_num_reorder_pics: indicates the maximum allowed number of pictures
* @sps_max_latency_increase_plus1: not equal to 0 is used to compute the
* value of SpsMaxLatencyPictures array
* @log2_min_luma_coding_block_size_minus3: this value plus 3 specifies the
* minimum luma coding block size
* @log2_diff_max_min_luma_coding_block_size: specifies the difference between
* the maximum and minimum luma
* coding block size
* @log2_min_luma_transform_block_size_minus2: this value plus 2 specifies the
* minimum luma transform block size
* @log2_diff_max_min_luma_transform_block_size: specifies the difference between
* the maximum and minimum luma
* transform block size
* @max_transform_hierarchy_depth_inter: specifies the maximum hierarchy
* depth for transform units of
* coding units coded in inter
* prediction mode
* @max_transform_hierarchy_depth_intra: specifies the maximum hierarchy
* depth for transform units of
* coding units coded in intra
* prediction mode
* @pcm_sample_bit_depth_luma_minus1: this value plus 1 specifies the number of
* bits used to represent each of PCM sample
* values of the luma component
* @pcm_sample_bit_depth_chroma_minus1: this value plus 1 specifies the number
* of bits used to represent each of PCM
* sample values of the chroma components
* @log2_min_pcm_luma_coding_block_size_minus3: this value plus 3 specifies the
* minimum size of coding blocks
* @log2_diff_max_min_pcm_luma_coding_block_size: specifies the difference between
* the maximum and minimum size of
* coding blocks
* @num_short_term_ref_pic_sets: specifies the number of st_ref_pic_set()
* syntax structures included in the SPS
* @num_long_term_ref_pics_sps: specifies the number of candidate long-term
* reference pictures that are specified in the SPS
* @chroma_format_idc: specifies the chroma sampling
* @sps_max_sub_layers_minus1: this value plus 1 specifies the maximum number
* of temporal sub-layers
* @flags: see V4L2_HEVC_SPS_FLAG_{}
*/
struct v4l2_ctrl_hevc_sps {
/* ISO/IEC 23008-2, ITU-T Rec. H.265: Sequence parameter set */
__u8 video_parameter_set_id;
__u8 seq_parameter_set_id;
__u16 pic_width_in_luma_samples;
@ -108,8 +167,43 @@ struct v4l2_ctrl_hevc_sps {
#define V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT (1ULL << 19)
#define V4L2_HEVC_PPS_FLAG_UNIFORM_SPACING (1ULL << 20)
/**
* struct v4l2_ctrl_hevc_pps - ITU-T Rec. H.265: Picture parameter set
*
* @pic_parameter_set_id: identifies the PPS for reference by other
* syntax elements
* @num_extra_slice_header_bits: specifies the number of extra slice header
* bits that are present in the slice header RBSP
* for coded pictures referring to the PPS.
* @num_ref_idx_l0_default_active_minus1: this value plus 1 specifies the inferred
* value of num_ref_idx_l0_active_minus1
* @num_ref_idx_l1_default_active_minus1: this value plus 1 specifies the inferred
* value of num_ref_idx_l1_active_minus1
* @init_qp_minus26: this value plus 26 specifies the initial value of SliceQp Y
* for each slice referring to the PPS
* @diff_cu_qp_delta_depth: specifies the difference between the luma coding
* tree block size and the minimum luma coding block
* size of coding units that convey cu_qp_delta_abs
* and cu_qp_delta_sign_flag
* @pps_cb_qp_offset: specify the offsets to the luma quantization parameter Cb
* @pps_cr_qp_offset: specify the offsets to the luma quantization parameter Cr
* @num_tile_columns_minus1: this value plus 1 specifies the number of tile columns
* partitioning the picture
* @num_tile_rows_minus1: this value plus 1 specifies the number of tile rows
* partitioning the picture
* @column_width_minus1: this value plus 1 specifies the width of each tile column
* in units of coding tree blocks
* @row_height_minus1: this value plus 1 specifies the height of each tile row in
* units of coding tree blocks
* @pps_beta_offset_div2: specify the default deblocking parameter offsets for
* beta divided by 2
* @pps_tc_offset_div2: specify the default deblocking parameter offsets for tC
* divided by 2
* @log2_parallel_merge_level_minus2: this value plus 2 specifies the value of
* the variable Log2ParMrgLevel
* @flags: see V4L2_HEVC_PPS_FLAG_{}
*/
struct v4l2_ctrl_hevc_pps {
/* ISO/IEC 23008-2, ITU-T Rec. H.265: Picture parameter set */
__u8 pic_parameter_set_id;
__u8 num_extra_slice_header_bits;
__u8 num_ref_idx_l0_default_active_minus1;
@ -148,6 +242,14 @@ struct v4l2_ctrl_hevc_pps {
#define V4L2_HEVC_DPB_ENTRIES_NUM_MAX 16
/**
* struct v4l2_hevc_dpb_entry - HEVC decoded picture buffer entry
*
* @timestamp: timestamp of the V4L2 capture buffer to use as reference.
* @flags: long term flag for the reference frame
* @field_pic: whether the reference is a field picture or a frame.
* @pic_order_cnt_val: the picture order count of the reference.
*/
struct v4l2_hevc_dpb_entry {
__u64 timestamp;
__u8 flags;
@ -156,6 +258,31 @@ struct v4l2_hevc_dpb_entry {
__u8 padding[2];
};
/**
* struct v4l2_hevc_pred_weight_table - HEVC weighted prediction parameters
*
* @delta_luma_weight_l0: the difference of the weighting factor applied
* to the luma prediction value for list 0
* @luma_offset_l0: the additive offset applied to the luma prediction value
* for list 0
* @delta_chroma_weight_l0: the difference of the weighting factor applied
* to the chroma prediction values for list 0
* @chroma_offset_l0: the difference of the additive offset applied to
* the chroma prediction values for list 0
* @delta_luma_weight_l1: the difference of the weighting factor applied
* to the luma prediction value for list 1
* @luma_offset_l1: the additive offset applied to the luma prediction value
* for list 1
* @delta_chroma_weight_l1: the difference of the weighting factor applied
* to the chroma prediction values for list 1
* @chroma_offset_l1: the difference of the additive offset applied to
* the chroma prediction values for list 1
* @luma_log2_weight_denom: the base 2 logarithm of the denominator for
* all luma weighting factors
* @delta_chroma_log2_weight_denom: the difference of the base 2 logarithm
* of the denominator for all chroma
* weighting factors
*/
struct v4l2_hevc_pred_weight_table {
__s8 delta_luma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
__s8 luma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
@ -184,6 +311,50 @@ struct v4l2_hevc_pred_weight_table {
#define V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_LOOP_FILTER_ACROSS_SLICES_ENABLED (1ULL << 8)
#define V4L2_HEVC_SLICE_PARAMS_FLAG_DEPENDENT_SLICE_SEGMENT (1ULL << 9)
/**
* struct v4l2_ctrl_hevc_slice_params - HEVC slice parameters
*
* @bit_size: size (in bits) of the current slice data
* @data_bit_offset: offset (in bits) to the video data in the current slice data
* @nal_unit_type: specifies the coding type of the slice (B, P or I)
* @nuh_temporal_id_plus1: minus 1 specifies a temporal identifier for the NAL unit
* @slice_type: see V4L2_HEVC_SLICE_TYPE_{}
* @colour_plane_id: specifies the colour plane associated with the current slice
* @slice_pic_order_cnt: specifies the picture order count
* @num_ref_idx_l0_active_minus1: this value plus 1 specifies the maximum reference
* index for reference picture list 0 that may be
* used to decode the slice
* @num_ref_idx_l1_active_minus1: this value plus 1 specifies the maximum reference
* index for reference picture list 1 that may be
* used to decode the slice
* @collocated_ref_idx: specifies the reference index of the collocated picture used
* for temporal motion vector prediction
* @five_minus_max_num_merge_cand: specifies the maximum number of merging
* motion vector prediction candidates supported in
* the slice subtracted from 5
* @slice_qp_delta: specifies the initial value of QpY to be used for the coding
* blocks in the slice
* @slice_cb_qp_offset: specifies a difference to be added to the value of pps_cb_qp_offset
* @slice_cr_qp_offset: specifies a difference to be added to the value of pps_cr_qp_offset
* @slice_act_y_qp_offset: screen content extension parameters
* @slice_act_cb_qp_offset: screen content extension parameters
* @slice_act_cr_qp_offset: screen content extension parameters
* @slice_beta_offset_div2: specify the deblocking parameter offsets for beta divided by 2
* @slice_tc_offset_div2: specify the deblocking parameter offsets for tC divided by 2
* @pic_struct: indicates whether a picture should be displayed as a frame or as one or
* more fields
* @slice_segment_addr: specifies the address of the first coding tree block in
* the slice segment
* @ref_idx_l0: the list of L0 reference elements as indices in the DPB
* @ref_idx_l1: the list of L1 reference elements as indices in the DPB
* @short_term_ref_pic_set_size: specifies the size of short-term reference
* pictures included in the SPS
* @long_term_ref_pic_set_size: specifies the size of long-term reference
* picture include in the SPS
* @pred_weight_table: the prediction weight coefficients for inter-picture
* prediction
* @flags: see V4L2_HEVC_SLICE_PARAMS_FLAG_{}
*/
struct v4l2_ctrl_hevc_slice_params {
__u32 bit_size;
__u32 data_bit_offset;
@ -230,6 +401,28 @@ struct v4l2_ctrl_hevc_slice_params {
#define V4L2_HEVC_DECODE_PARAM_FLAG_IDR_PIC 0x2
#define V4L2_HEVC_DECODE_PARAM_FLAG_NO_OUTPUT_OF_PRIOR 0x4
/**
* struct v4l2_ctrl_hevc_decode_params - HEVC decode parameters
*
* @pic_order_cnt_val: picture order count
* @short_term_ref_pic_set_size: specifies the size of short-term reference
* pictures set included in the SPS of the first slice
* @long_term_ref_pic_set_size: specifies the size of long-term reference
* pictures set include in the SPS of the first slice
* @num_active_dpb_entries: the number of entries in dpb
* @dpb: the decoded picture buffer, for meta-data about reference frames
* @num_poc_st_curr_before: the number of reference pictures in the short-term
* set that come before the current frame
* @num_poc_st_curr_after: the number of reference pictures in the short-term
* set that come after the current frame
* @num_poc_lt_curr: the number of reference pictures in the long-term set
* @poc_st_curr_before: provides the index of the short term before references
* in DPB array
* @poc_st_curr_after: provides the index of the short term after references
* in DPB array
* @poc_lt_curr: provides the index of the long term references in DPB array
* @flags: see V4L2_HEVC_DECODE_PARAM_FLAG_{}
*/
struct v4l2_ctrl_hevc_decode_params {
__s32 pic_order_cnt_val;
__u16 short_term_ref_pic_set_size;
@ -245,6 +438,28 @@ struct v4l2_ctrl_hevc_decode_params {
__u64 flags;
};
/**
* struct v4l2_ctrl_hevc_scaling_matrix - HEVC scaling lists parameters
*
* @scaling_list_4x4: scaling list is used for the scaling process for
* transform coefficients. The values on each scaling
* list are expected in raster scan order
* @scaling_list_8x8: scaling list is used for the scaling process for
* transform coefficients. The values on each scaling
* list are expected in raster scan order
* @scaling_list_16x16: scaling list is used for the scaling process for
* transform coefficients. The values on each scaling
* list are expected in raster scan order
* @scaling_list_32x32: scaling list is used for the scaling process for
* transform coefficients. The values on each scaling
* list are expected in raster scan order
* @scaling_list_dc_coef_16x16: scaling list is used for the scaling process
* for transform coefficients. The values on each
* scaling list are expected in raster scan order.
* @scaling_list_dc_coef_32x32: scaling list is used for the scaling process
* for transform coefficients. The values on each
* scaling list are expected in raster scan order.
*/
struct v4l2_ctrl_hevc_scaling_matrix {
__u8 scaling_list_4x4[6][16];
__u8 scaling_list_8x8[6][64];