[VDPAU] [PATCH] Extend the VDPAU API to support H.265/HEVC Decoding
Christian König
christian.koenig at amd.com
Fri Jan 30 01:13:27 PST 2015
Am 29.01.2015 um 22:30 schrieb José Hiram Soltren:
> I will offer a follow-on patch for review based on the items below. Please see
> my responses to Aaron's points in particular below.
>
> Aaron, in offline conversation you raised two good points.
>
> 1. The ordering of fields here should agree with the ordering of fields as
> presented in the VPS, PPS and SPS descriptions in Clause 7 of the Specification.
>
> 2. You were worried that the API here may not be sufficiently generic for
> non-NVIDIA hardware implementation. I maintain that this API provides enough
> data for any implementation of the decoding process specified in clauses 8.4
> through 8.7 to be able to proceed.
I can't 100% confirm that it will work on AMD hardware as well, but to
me it looks quite good in general.
Regards,
Christian.
>
> Please read on below.
>
> On 01/29/2015 02:42 PM, Aaron Plattner wrote:
>> On 01/26/2015 10:47 AM, José Hiram Soltren wrote:
>>> This patch adds an API for player applications to utilize VDPAU for
>>> hardware-accelerated playback of H.265/HEVC streams.
>>>
>>> The goals of this API are:
>>> - enable hardware accelerated decoding of H.265/HEVC content under VDPAU;
>>> - provide a reference implementation for H.265/HEVC hardware decoding that
>>> is vendor agnostic;
>>> - provide enough data for H.265/HEVC hardware acceleration implementations
>>> from multiple vendors to be able to use the same API;
>>>
>>> This patch is written against "version one" of the H.265/HEVC Specification,
>>> Rec. ITU-T H.265 (04/2013), available at:
>>>
>>> http://www.itu.int/rec/T-REC-H.265-201304-I
>> This link seems to be broken. In an offline conversation, you suggested this
>> instead:
>>
>> http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=11885
>>
>> That seems iffy from a http://www.w3.org/Provider/Style/URI standpoint, but
>> meh. I'll substitute that URL for the one in the patch if nothing else needs
>> to change.
> Yes. In that case http://handle.itu.int/11.1002/1000/12296 is likely a better
> choice. This is the "Citation" URI offered by the ITU.
>
>>> A future patch against this header may address bug fixes, and may support
>>> the new features described in "version two" of the H.265/HEVC Specification,
>>> Rec. ITU-T H.265 v2 (10/2014).
>>>
>>> Note that the API does need to be self documenting with Doxygen markup,
>>> which we (NVIDIA) will generate and post as an update to our public VDPAU
>>> documentation.
>>>
>>> This is version four of this patch. clarifying some documentation
>>> related to H.265/HEVC support.
>>> ---
>>> include/vdpau/vdpau.h | 308 ++++++++++++++++++++++++++++++++++++++++++++++++-
>>> 1 file changed, 307 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/include/vdpau/vdpau.h b/include/vdpau/vdpau.h
>>> index b386825..ea9d927 100644
>>> --- a/include/vdpau/vdpau.h
>>> +++ b/include/vdpau/vdpau.h
>>> @@ -6,7 +6,7 @@
>>> /*
>>> * This copyright notice applies to this header file:
>>> *
>>> - * Copyright (c) 2008-2010 NVIDIA Corporation
>>> + * Copyright (c) 2008-2015 NVIDIA Corporation
>>> *
>>> * Permission is hereby granted, free of charge, to any person
>>> * obtaining a copy of this software and associated documentation
>>> @@ -432,6 +432,26 @@
>>> * Include all slices beginning with start codes 0x000001B6. The slice start
>>> * code must be included for all slices.
>>> *
>>> + * \subsection bitstream_hevc H.265/HEVC - High Efficiency Video Codec
>>> + *
>>> + * Include all video coding layer (VCL) NAL units, with nal_unit_type values
>>> + * of 0 (TRAIL_N) through 31 (RSV_VCL31) inclusive. In addition to parsing
>>> + * and providing NAL units, an H.265/HEVC decoder application using VDPAU
>>> + * for decoding must parse certain values of the first slice segment header
>>> + * in a VCL NAL unit and provide it through VdpPictureInfoHEVC. Please see
>>> + * the documentation for VdpPictureInfoHEVC below for further details.
>>> + *
>>> + * The complete slice start code (including the 0x000001 prefix) must be
>>> + * included for all slices, even when the prefix is not included in the
>>> + * bitstream.
>>> + *
>>> + * Note that if desired:
>>> + *
>>> + * - The slice start code prefix may be included in a separate bitstream
>>> + * buffer array entry to the actual slice data extracted from the bitstream.
>>> + * - Multiple bitstream buffer array entries (e.g. one per slice) may point at
>>> + * the same physical data storage for the slice start code prefix.
>>> + *
>>> * \section video_mixer_usage Video Mixer Usage
>>> *
>>> * \subsection video_surface_content VdpVideoSurface Content
>>> @@ -2463,6 +2483,17 @@ typedef uint32_t VdpDecoderProfile;
>>> /** \hideinitializer */
>>> /** \brief Support for 8 bit depth only */
>>> #define VDP_DECODER_PROFILE_H264_HIGH_444_PREDICTIVE
>>> ((VdpDecoderProfile)26)
>>> +/** \hideinitializer */
>>> +/** \brief MPEG-H Part 2 == H.265 == HEVC */
>>> +#define VDP_DECODER_PROFILE_HEVC_MAIN ((VdpDecoderProfile)50)
>>> +/** \hideinitializer */
>>> +#define VDP_DECODER_PROFILE_HEVC_MAIN_10 ((VdpDecoderProfile)51)
>>> +/** \hideinitializer */
>>> +#define VDP_DECODER_PROFILE_HEVC_MAIN_STILL ((VdpDecoderProfile)52)
>>> +/** \hideinitializer */
>>> +#define VDP_DECODER_PROFILE_HEVC_MAIN_12 ((VdpDecoderProfile)53)
>>> +/** \hideinitializer */
>>> +#define VDP_DECODER_PROFILE_HEVC_MAIN_444 ((VdpDecoderProfile)54)
>>>
>>> /** \hideinitializer */
>>> #define VDP_DECODER_LEVEL_MPEG1_NA 0
>>> @@ -2558,6 +2589,38 @@ typedef uint32_t VdpDecoderProfile;
>>> #define VDP_DECODER_LEVEL_DIVX_NA 0
>>>
>>> /**
>>> + * The VDPAU H.265/HEVC decoder levels correspond to the values of
>>> + * general_level_idc as described in the H.265 Specification, Annex A,
>> Indentation got a little wonky here.
> That is easy enough to fix, yes.
>
>>> + * Table A.1. The enumeration values are equal to thirty times the level
>>> + * number.
>>> + */
>>> +#define VDP_DECODER_LEVEL_HEVC_1 30
>>> +/** \hideinitializer */
>>> +#define VDP_DECODER_LEVEL_HEVC_2 60
>>> +/** \hideinitializer */
>>> +#define VDP_DECODER_LEVEL_HEVC_2_1 63
>>> +/** \hideinitializer */
>>> +#define VDP_DECODER_LEVEL_HEVC_3 90
>>> +/** \hideinitializer */
>>> +#define VDP_DECODER_LEVEL_HEVC_3_1 93
>>> +/** \hideinitializer */
>>> +#define VDP_DECODER_LEVEL_HEVC_4 120
>>> +/** \hideinitializer */
>>> +#define VDP_DECODER_LEVEL_HEVC_4_1 123
>>> +/** \hideinitializer */
>>> +#define VDP_DECODER_LEVEL_HEVC_5 150
>>> +/** \hideinitializer */
>>> +#define VDP_DECODER_LEVEL_HEVC_5_1 153
>>> +/** \hideinitializer */
>>> +#define VDP_DECODER_LEVEL_HEVC_5_2 156
>>> +/** \hideinitializer */
>>> +#define VDP_DECODER_LEVEL_HEVC_6 180
>>> +/** \hideinitializer */
>>> +#define VDP_DECODER_LEVEL_HEVC_6_1 183
>>> +/** \hideinitializer */
>>> +#define VDP_DECODER_LEVEL_HEVC_6_2 186
>>> +
>>> +/**
>>> * \brief Query the implementation's VdpDecoder capabilities.
>>> * \param[in] device The device to query.
>>> * \param[in] profile The decoder profile for which information is requested.
>>> @@ -3054,6 +3117,249 @@ typedef VdpPictureInfoMPEG4Part2 VdpPictureInfoDivX4;
>>> typedef VdpPictureInfoMPEG4Part2 VdpPictureInfoDivX5;
>>>
>>> /**
>>> + * \brief Picture parameter information for an H.265/HEVC picture.
>>> + *
>>> + * Note: References to "copy of ... bitstream field" in the field
>>> + * descriptions may refer to data literally parsed from the bitstream,
>>> + * or derived from the bitstream using a mechanism described in
>>> + * Rec. ITU-T H.265 (04/2013), hereafter referred to as
>>> + * "the H.265/HEVC Specification".
>>> + *
>>> + * Client applications must supply every field in this struct.
>>> + */
>>> +typedef struct {
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint32_t pic_width_in_luma_samples;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint32_t pic_height_in_luma_samples;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t log2_min_luma_coding_block_size_minus3;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t log2_diff_max_min_luma_coding_block_size;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t log2_min_transform_block_size_minus2;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t log2_diff_max_min_transform_block_size;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t pcm_enabled_flag;
>>> + /** Copy of the Sequence Parameter Set bitstream field.
>>> + Only needs to be set if pcm_enabled_flag is set. */
>>> + uint8_t log2_min_pcm_luma_coding_block_size_minus3;
>>> + /** Copy of the Sequence Parameter Set bitstream field.
>>> + Only needs to be set if pcm_enabled_flag is set. */
>>> + uint8_t log2_diff_max_min_pcm_luma_coding_block_size;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t bit_depth_luma_minus8;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t bit_depth_chroma_minus8;
>>> + /** Copy of the Sequence Parameter Set bitstream field.
>>> + Only needs to be set if pcm_enabled_flag is set. */
>>> + uint8_t pcm_sample_bit_depth_luma_minus1;
>>> + /** Copy of the Sequence Parameter Set bitstream field.
>>> + Only needs to be set if pcm_enabled_flag is set. */
>>> + uint8_t pcm_sample_bit_depth_chroma_minus1;
>>> + /** Copy of the Sequence Parameter Set bitstream field.
>>> + Only needs to be set if pcm_enabled_flag is set. */
>>> + uint8_t pcm_loop_filter_disabled_flag;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t strong_intra_smoothing_enabled_flag;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t max_transform_hierarchy_depth_intra;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t max_transform_hierarchy_depth_inter;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t amp_enabled_flag;
>>> + /** Copy of the Sequence Parameter Set bitstream field.
>>> + Only valid if chroma_format_idc == 3. */
>>> + uint8_t separate_colour_plane_flag;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t log2_max_pic_order_cnt_lsb_minus4;
>>> + /** Copy of the Sequence Parameter Set bitstream field.
>>> + Per spec, when zero, assume short_term_ref_pic_set_sps_flag
>>> + is also zero. */
>>> + uint8_t num_short_term_ref_pic_sets;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t long_term_ref_pics_present_flag;
>>> + /** Copy of the Sequence Parameter Set bitstream field.
>>> + Only needed if long_term_ref_pics_present_flag is set. */
>>> + uint8_t num_long_term_ref_pics_sps;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t sps_temporal_mvp_enabled_flag;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t sample_adaptive_offset_enabled_flag;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t scaling_list_enabled_flag;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t chroma_format_idc;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t sps_sub_layer_ordering_info_present_flag;
>>> + /** Copy of the Sequence Parameter Set bitstream field. */
>>> + uint8_t sps_max_dec_pic_buffering_minus1;
>>> +
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t dependent_slice_segments_enabled_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t slice_segment_header_extension_present_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t sign_data_hiding_enabled_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t cu_qp_delta_enabled_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field.
>>> + Only needed if cu_qp_delta_enabled_flag is set. */
>>> + uint8_t diff_cu_qp_delta_depth;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + int8_t init_qp_minus26;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + int8_t pps_cb_qp_offset;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + int8_t pps_cr_qp_offset;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t constrained_intra_pred_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t weighted_pred_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t weighted_bipred_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t transform_skip_enabled_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t transquant_bypass_enabled_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t entropy_coding_sync_enabled_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t log2_parallel_merge_level_minus2;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t num_extra_slice_header_bits;
>>> + /** Copy of the Picture Parameter Set bitstream field.
>>> + Only needed if tiles_enabled_flag is set. */
>>> + uint8_t loop_filter_across_tiles_enabled_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t pps_loop_filter_across_slices_enabled_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t output_flag_present_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t num_ref_idx_l0_default_active_minus1;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t num_ref_idx_l1_default_active_minus1;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t lists_modification_present_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t cabac_init_present_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t pps_slice_chroma_qp_offsets_present_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t deblocking_filter_control_present_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field.
>>> + Only valid if deblocking_filter_control_present_flag is set. */
>>> + uint8_t deblocking_filter_override_enabled_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field.
>>> + Only valid if deblocking_filter_control_present_flag is set. */
>>> + uint8_t pps_deblocking_filter_disabled_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field.
>>> + Only valid if deblocking_filter_control_present_flag is set. */
>>> + int8_t pps_beta_offset_div2;
>>> + /** Copy of the Picture Parameter Set bitstream field.
>>> + Only valid if deblocking_filter_control_present_flag is set. */
>>> + int8_t pps_tc_offset_div2;
>>> + /** Copy of the Picture Parameter Set bitstream field. */
>>> + uint8_t tiles_enabled_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field.
>>> + Only valid if tiles_enabled_flag is set. */
>>> + uint8_t uniform_spacing_flag;
>>> + /** Copy of the Picture Parameter Set bitstream field.
>>> + Only valid if tiles_enabled_flag is set. */
>>> + uint8_t num_tile_columns_minus1;
>>> + /** Copy of the Picture Parameter Set bitstream field.
>>> + Only valid if tiles_enabled_flag is set. */
>>> + uint8_t num_tile_rows_minus1;
>>> + /** Copy of the Picture Parameter Set bitstream field.
>>> + Only need to set 0..num_tile_columns_minus1. The struct
>>> + definition reserves up to the maximum of 22. */
>>> + uint16_t column_width_minus1[22];
>>> + /** Copy of the Picture Parameter Set bitstream field.
>>> + Only need to set 0..num_tile_rows_minus1. The struct
>>> + definition reserves up to the maximum of 20. */
>>> + uint16_t row_height_minus1[20];
>> I know it's not the current convention, but it would make vdpau.h easier to
>> read if these used Doxygen's member group syntax. E.g., something like this:
>>
>> /** \name Sequence Parameter Set
>> *
>> * These fields are copies of the data from the Sequence Parameter Set
>> * bitstream fields.
>> */
>> /** @{ */
>> uint32_t pic_width_in_luma_samples;
>> uint32_t pic_height_in_luma_samples;
>> uint8_t log2_min_luma_coding_block_size_minus3;
>> uint8_t log2_diff_max_min_luma_coding_block_size;
>> uint8_t log2_min_transform_block_size_minus2;
>> uint8_t log2_diff_max_min_transform_block_size;
>> uint8_t pcm_enabled_flag;
>> /** Only needs to be set if pcm_enabled_flag is set. */
>> uint8_t log2_min_pcm_luma_coding_block_size_minus3;
>> ...
>> /** @} */
>>
>> /** \name Picture Parameter Set
>> *
>> * These fields are copies of the data from the Picture Parameter Set
>> * bitstream fields.
>> */
>> /** @{ */
>> ...
>>
>> If that sounds reasonable, I'll put together a patch to change the other
>> PictureInfo structures to use that cleanup.
> Sure. This de-duplicate the comments. I just know that we need to be careful to
> explicitly call attention to fields not specified in the Specification, such as
> NumShortTermPictureSliceHeaderBits and NumLongTermPictureSliceHeaderBits.
>
> If you do undertake such a change - perhaps wait until I have sent the
> follow-on to this patch?
>
> It would be good to check that all calculated values use the
> UpperCamelCaseNamingConvention that the Specification uses. This is in contrast
> to the lower_case_underscored_naming_convention that the Specification uses for
> explicitly signalled values.
>
> Thanks,
> --José
>
>>> + // Reference Picture Sets
>>> + /** Copy of specification field, CurrRpsIdx, see 7.4.7.1. */
>>> + uint32_t CurrRpsIdx;
>>> + /** Set to 1 if nal_unit_type is equal to IDR_W_RADL or IDR_N_LP.
>>> + Set to zero otherwise. */
>>> + uint32_t IDRPicFlag;
>>> + /** Set to 1 if nal_unit_type in the range of BLA_W_LP to
>>> + RSV_IRAP_VCL23, inclusive. Set to zero otherwise.*/
>>> + uint32_t RAPPicFlag;
>>> + /** Corresponds to specification field, NumDeltaPocs[RefRpsIdx].
>>> + Only applicable when short_term_ref_pic_set_sps_flag == 0.
>>> + Implementations will ignore this value in other cases. */
>>> + uint32_t NumDeltaPocsOfRefRpsIdx;
>>> + /** Copy of specification field, see Section 7.4.7.2 of the
>>> + H.265/HEVC Specification. */
>>> + uint32_t NumPocTotalCurr;
>>> + /** Copy of specification field, see Section 8.3.2 of the
>>> + H.265/HEVC Specification. */
>>> + uint32_t NumPocStCurrBefore;
>>> + /** Copy of specification field, see Section 8.3.2 of the
>>> + H.265/HEVC Specification. */
>>> + uint32_t NumPocStCurrAfter;
>>> + /** Copy of specification field, see Section 8.3.2 of the
>>> + H.265/HEVC Specification. */
>>> + uint32_t NumPocLtCurr;
>>> + /** Section 7.6.3.1 of the H.265/HEVC Specification defines the syntax of
>>> + the slice_segment_header. This header contains information that
>>> + some VDPAU implementations may choose to skip. The VDPAU API
>>> + requires client applications to track the number of bits used in the
>>> + slice header for structures associated with short term and long term
>>> + reference pictures. First, VDPAU requires the number of bits used by
>>> + the short_term_ref_pic_set array in the slice_segment_header. */
>>> + uint32_t NumShortTermPictureSliceHeaderBits;
>>> + /** Second, VDPAU requires the number of bits used for long term reference
>>> + pictures in the slice_segment_header. This is equal to the number
>>> + of bits used for the contents of the block beginning with
>>> + "if(long_term_ref_pics_present_flag)". */
>>> + uint32_t NumLongTermPictureSliceHeaderBits;
>>> + /** The value of PicOrderCntVal of the picture in the access unit
>>> + containing the SEI message. The picture being decoded. */
>>> + int32_t CurrPicOrderCntVal;
>>> + /** Array of video reference surfaces.
>>> + Set any unused positions to VDP_INVALID_HANDLE. */
>>> + VdpVideoSurface RefPics[16];
>>> + /** Array of picture order counts. These correspond to positions
>>> + in the RefPics array. */
>>> + int32_t PicOrderCntVal[16];
>>> + /** Array used to specify whether a particular RefPic is
>>> + a long term reference. A value of "1" indicates a long-term
>>> + reference. */
>>> + uint8_t IsLongTerm[16];
>>> + /** Reference Picture Set list, one of the short-term RPS. */
>>> + int8_t RefPicSetStCurrBefore[8];
>>> + /** Reference Picture Set list, one of the short-term RPS. */
>>> + int8_t RefPicSetStCurrAfter[8];
>>> + /** Reference Picture Set list, one of the long-term RPS. */
>>> + int8_t RefPicSetLtCurr[8];
>>> +
>>> + // scaling lists (diag order)
>>> + /** Scaling List for 4x4 quantization matrix,
>>> + indexed as ScalingList4x4[matrixId][i]. */
>>> + uint8_t ScalingList4x4[6][16];
>>> + /** Scaling List for 8x8 quantization matrix,
>>> + indexed as ScalingList8x8[matrixId][i]. */
>>> + uint8_t ScalingList8x8[6][64];
>>> + /** Scaling List for 16x16 quantization matrix,
>>> + indexed as ScalingList16x16[matrixId][i]. */
>>> + uint8_t ScalingList16x16[6][64];
>>> + /** Scaling List for 32x32 quantization matrix,
>>> + indexed as ScalingList32x32[matrixId][i]. */
>>> + uint8_t ScalingList32x32[2][64];
>>> + /** Scaling List DC Coefficients for 16x16,
>>> + indexed as ScalingListDCCoeff16x16[matrixId]. */
>>> + uint8_t ScalingListDCCoeff16x16[6];
>>> + /** Scaling List DC Coefficients for 32x32,
>>> + indexed as ScalingListDCCoeff32x32[matrixId]. */
>>> + uint8_t ScalingListDCCoeff32x32[2];
>>> +} VdpPictureInfoHEVC;
>>> +
>>> +/**
>>> * \brief Decode a compressed field/frame and render the result
>>> * into a \ref VdpVideoSurface "VdpVideoSurface".
>>> * \param[in] decoder The decoder object that will perform the
>>>
>>
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