/* Gstreamer H.266 bitstream parser
 *
 * Copyright (C) 2023 Intel Corporation
 *    Author: Zhong Hongcheng <spartazhc@gmail.com>
 *    Author: He Junyan <junyan.he@intel.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#pragma once

#ifndef GST_USE_UNSTABLE_API
#warning "The H.266 parsing library is unstable API and may change in future."
#warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
#endif

#include <gst/gst.h>
#include <gst/codecparsers/codecparsers-prelude.h>

G_BEGIN_DECLS

#define GST_H266_IS_B_SLICE(slice)  ((slice)->slice_type == GST_H266_B_SLICE)
#define GST_H266_IS_P_SLICE(slice)  ((slice)->slice_type == GST_H266_P_SLICE)
#define GST_H266_IS_I_SLICE(slice)  ((slice)->slice_type == GST_H266_I_SLICE)

/* 6.2 we can have 3 sample arrays */
#define GST_H266_MAX_SAMPLE_ARRAYS 3
/* 7.4.3.3 vps_max_layers_minus1 is u(6) */
#define GST_H266_MAX_LAYERS 64
/* 7.4.3.3 The value of vps_max_sublayers_minus1
 * shall be in the range of 0 to 6, inclusive */
#define GST_H266_MAX_SUBLAYERS 7
/* 3-bit minus1 value, so max is 7+1 */
#define GST_H266_MAX_SLI_REF_LEVELS 8
/* 7.4.3.3 vps_num_output_layer_sets_minus2 is u(8) */
#define GST_H266_MAX_TOTAL_NUM_OLSS 257
/* 7.4.3.3 vps_num_ptls_minus1 shall be less than TotalNumOlss,
 * which is MAX(GST_H266_MAX_LAYERS, GST_H266_MAX_TOTAL_NUM_OLSS) */
#define GST_H266_MAX_PTLS GST_H266_MAX_TOTAL_NUM_OLSS
/* 7.3.2.3: vps_video_parameter_set_id is u(4). */
#define GST_H266_MAX_VPS_COUNT 16
/* 7.3.2.4: sps_seq_parameter_set_id is u(4) */
#define GST_H266_MAX_SPS_COUNT 16
/* 7.3.2.5: pps_pic_parameter_set_id is u(6) */
#define GST_H266_MAX_PPS_COUNT 64
/* 7.3.2.7: the value of aps_adaptation_parameter_set_id shall be in
 * the range of 0 to 7 or in the range of 0 to 3 inclusive, depending
 * on the aps_params_type. */
#define GST_H266_MAX_APS_COUNT 8
/* 7.4.4.1: ptl_num_sub_profiles is u(8) */
#define GST_H266_MAX_SUB_PROFILES 256
/* A.4.2: MaxDpbSize is bounded above by 2*maxDpbPicBuf(8) */
#define GST_H266_MAX_DPB_SIZE 16
/* 7.4.3.4: sps_num_ref_pic_lists in range [0, 64] */
#define GST_H266_MAX_REF_PIC_LISTS 64
/* 7.4.3.18: NumAlfFilters is 25 */
#define GST_H266_NUM_ALF_FILTERS 25
/* 7.4.11: num_ref_entries in range [0, MaxDpbSize + 13] */
#define GST_H266_MAX_REF_ENTRIES (GST_H266_MAX_DPB_SIZE + 13)
/* 7.4.3.3 sps_num_points_in_qp_table_minus1[i] in range
 * [0, 36 - sps_qp_table_start_minus26[i]], and sps_qp_table_start_minus26[i]
 * in range [-26 - QpBdOffset, 36]. For 16 bits QpBdOffset is 6*8,
 * so sps_num_points_in_qp_table_minus1[i] in range [0, 110] */
#define GST_H266_MAX_POINTS_IN_QP_TABLE 111
/* 7.4.6.1: hrd_cpb_cnt_minus1 is in [0, 31]. */
#define GST_H266_MAX_CPB_CNT 32
/* A.4.1: the highest level allows a MaxLumaPs of 35 651 584. */
#define GST_H266_MAX_LUMA_PS 35651584
/* A.4.1: pic_width_in_luma_samples and pic_height_in_luma_samples are
 * constrained to be not greater than sqrt(MaxLumaPs * 8).  Hence height/
 * width are bounded above by sqrt(8 * 35651584) = 16888.2 samples. */
#define GST_H266_MAX_WIDTH 16888
#define GST_H266_MAX_HEIGHT 16888
/* A.4.1: table A.1 allows at most 440 tiles per au for any level. */
#define GST_H266_MAX_TILES_PER_AU 440
/* A.4.1: table A.1 did not define max tile rows. */
/* in worest a case, we can have 1x440 tiles picture. */
#define GST_H266_MAX_TILE_ROWS GST_H266_MAX_TILES_PER_AU
/* A.4.1: table A.1 allows at most 20 tile columns for any level. */
#define GST_H266_MAX_TILE_COLUMNS 20
/* A.4.1 table A.1 allows at most 1000 slice for any level. */
#define GST_H266_MAX_SLICES_PER_AU 1000
/* 7.4.8: in the worst case (!pps_no_pic_partition_flag and
 * sps_entropy_coding_sync_enabled_flag are both true), entry points can be
 * placed at the beginning of every Ctb row in every tile, giving an
 * upper bound of (num_tile_columns_minus1 + 1) * PicHeightInCtbsY - 1.
 * Only a stream with very high resolution and perverse parameters could
 * get near that, though, so set a lower limit here with the maximum
 * possible value for 8K video (at most 135 32x32 Ctb rows). */
#define GST_H266_MAX_ENTRY_POINTS (GST_H266_MAX_TILE_COLUMNS * 135)
/* Use MaxLumaPs of level 6.3 in Table A.2.
   The min coding block size is 8, so min width or height is 8.
   The min CTU size is 32. */
#define GST_H266_MAX_CTUS_IN_PICTURE (80216064 / 8 / 32)

/**
 * GST_H266_IS_NAL_TYPE_IDR:
 * @nal_type: a #GstH266NalUnitType
 *
 * Check whether @nal_type is IDR or not.
 *
 * Since: 1.26
 */
#define GST_H266_IS_NAL_TYPE_IDR(nal_type) \
  ((nal_type) == GST_H266_NAL_SLICE_IDR_N_LP || \
   (nal_type) == GST_H266_NAL_SLICE_IDR_W_RADL)

/**
 * GST_H266_IS_NAL_TYPE_GDR:
 * @nal_type: a #GstH266NalUnitType
 *
 * Check whether @nal_type is GDR or not.
 *
 * Since: 1.26
 */
#define GST_H266_IS_NAL_TYPE_GDR(nal_type) ((nal_type) == GST_H266_NAL_SLICE_GDR)

/**
 * GST_H266_IS_NAL_TYPE_CRA:
 * @nal_type: a #GstH266NalUnitType
 *
 * Check whether @nal_type is CRA or not.
 *
 * Since: 1.26
 */
#define GST_H266_IS_NAL_TYPE_CRA(nal_type) ((nal_type) == GST_H266_NAL_SLICE_CRA)

/**
 * GST_H266_IS_NAL_TYPE_IRAP:
 * @nal_type: a #GstH266NalUnitType
 *
 * Check whether @nal_type is IRAP or not.
 *
 * Since: 1.26
 */
#define GST_H266_IS_NAL_TYPE_IRAP(nal_type) \
  (GST_H266_IS_NAL_TYPE_IDR (nal_type) || GST_H266_IS_NAL_TYPE_CRA (nal_type))

/**
 * GST_H266_IS_NAL_TYPE_CVSS:
 * @nal_type: a #GstH266NalUnitType
 *
 * Check whether @nal_type is coded video sequence start or not.
 *
 * Since: 1.26
 */
#define GST_H266_IS_NAL_TYPE_CVSS(nal_type) \
  (GST_H266_IS_NAL_TYPE_IRAP(nal_type) || GST_H266_IS_NAL_TYPE_GDR(nal_type))

/**
 * GST_H266_IS_NAL_TYPE_RADL:
 * @nal_type: a #GstH266NalUnitType
 *
 * Check whether @nal_type is RADL or not.
 *
 * Since: 1.26
 */
#define GST_H266_IS_NAL_TYPE_RADL(nal_type) ((nal_type) == GST_H266_NAL_SLICE_RADL)

/**
 * GST_H266_IS_NAL_TYPE_RASL:
 * @nal_type: a #GstH266NalUnitType
 *
 * Check whether @nal_type is RASL or not.
 *
 * Since: 1.26
 */
#define GST_H266_IS_NAL_TYPE_RASL(nal_type) ((nal_type) == GST_H266_NAL_SLICE_RASL)

/**
 * GstH266ParserResult:
 *
 * The result of parsing H266 data.
 *
 * @GST_H266_PARSER_OK: The parsing succeeded.
 * @GST_H266_PARSER_BROKEN_DATA: The data to parse is broken.
 * @GST_H266_PARSER_BROKEN_LINK: The link to structure needed for the parsing
 *  couldn't be found.
 * @GST_H266_PARSER_ERROR: An error accured when parsing.
 * @GST_H266_PARSER_NO_NAL: No nal found during the parsing.
 * @GST_H266_PARSER_NO_NAL_END: Start of the nal found, but not the end.
 *
 * Since: 1.26
 */
typedef enum
{
  GST_H266_PARSER_OK,
  GST_H266_PARSER_BROKEN_DATA,
  GST_H266_PARSER_BROKEN_LINK,
  GST_H266_PARSER_ERROR,
  GST_H266_PARSER_NO_NAL,
  GST_H266_PARSER_NO_NAL_END
} GstH266ParserResult;

/**
 * GstH266Profile:
 *
 * H.266 Profiles.
 *
 * @GST_H266_PROFILE_MAIN_10: Main 10 profile (A.3.1).
 * @GST_H266_PROFILE_MAIN_10_STILL_PICTURE: Main 10 Still Picture profile (A.3.1).
 * @GST_H266_PROFILE_MULTILAYER_MAIN_10: MultiLayer Main 10 profile (A.3.3).
 * @GST_H266_PROFILE_MULTILAYER_MAIN_10_STILL_PICTURE: MultiLayer Main 10 Still
 *  Picture profile (A.3.3).
 * @GST_H266_PROFILE_MAIN_10_444: Main 10 4:4:4 profile (A.3.2).
 * @GST_H266_PROFILE_MAIN_10_444_STILL_PICTURE: Main 10 4:4:4 Still Picture
 *  profile (A.3.2).
 * @GST_H266_PROFILE_MULTILAYER_MAIN_10_444: MultiLayer Main 10 4:4:4
 *  profile (A.3.4).
 * @GST_H266_PROFILE_MULTILAYER_MAIN_10_444_STILL_PICTURE: MultiLayer Main 10
 *  4:4:4 Still Picture profile (A.3.4).
 * @GST_H266_PROFILE_MAIN_12: Main 12 profile (A.3.5).
 * @GST_H266_PROFILE_MAIN_12_444: Main 12 4:4:4 profile (A.3.5).
 * @GST_H266_PROFILE_MAIN_16_444: Main 16 4:4:4 profile (A.3.5).
 * @GST_H266_PROFILE_MAIN_12_INTRA: Main 12 Intra profile (A.3.5).
 * @GST_H266_PROFILE_MAIN_12_444_INTRA: Main 12 4:4:4 Intra profile (A.3.5).
 * @GST_H266_PROFILE_MAIN_16_444_INTRA: Main 16 4:4:4 Intra profile (A.3.5).
 * @GST_H266_PROFILE_MAIN_12_STILL_PICTURE: Main 12 Still Picture profile (A.3.5).
 * @GST_H266_PROFILE_MAIN_12_444_STILL_PICTURE: Main 12 4:4:4 Still Picture
 *  profile (A.3.5).
 * @GST_H266_PROFILE_MAIN_16_444_STILL_PICTURE: Main 16 4:4:4 Still Picture
 *  profile (A.3.5).
 *
 * Since: 1.26
 */
typedef enum {
  GST_H266_PROFILE_INVALID                              = -1,
  GST_H266_PROFILE_NONE                                 = 0,

  GST_H266_PROFILE_INTRA                                = 8,
  GST_H266_PROFILE_STILL_PICTURE                        = 64,

  GST_H266_PROFILE_MAIN_10                              = 1,
  GST_H266_PROFILE_MAIN_10_STILL_PICTURE                = GST_H266_PROFILE_MAIN_10 | GST_H266_PROFILE_STILL_PICTURE,
  GST_H266_PROFILE_MULTILAYER_MAIN_10                   = 17,
  GST_H266_PROFILE_MULTILAYER_MAIN_10_STILL_PICTURE     = GST_H266_PROFILE_MULTILAYER_MAIN_10 | GST_H266_PROFILE_STILL_PICTURE,
  GST_H266_PROFILE_MAIN_10_444                          = 33,
  GST_H266_PROFILE_MAIN_10_444_STILL_PICTURE            = GST_H266_PROFILE_MAIN_10_444 | GST_H266_PROFILE_STILL_PICTURE,
  GST_H266_PROFILE_MULTILAYER_MAIN_10_444               = 49,
  GST_H266_PROFILE_MULTILAYER_MAIN_10_444_STILL_PICTURE = GST_H266_PROFILE_MULTILAYER_MAIN_10_444 | GST_H266_PROFILE_STILL_PICTURE,
  GST_H266_PROFILE_MAIN_12                              = 2,
  GST_H266_PROFILE_MAIN_12_444                          = 34,
  GST_H266_PROFILE_MAIN_16_444                          = 35,
  GST_H266_PROFILE_MAIN_12_INTRA                        = GST_H266_PROFILE_MAIN_12 | GST_H266_PROFILE_INTRA,
  GST_H266_PROFILE_MAIN_12_444_INTRA                    = GST_H266_PROFILE_MAIN_12_444 | GST_H266_PROFILE_INTRA,
  GST_H266_PROFILE_MAIN_16_444_INTRA                    = GST_H266_PROFILE_MAIN_16_444 | GST_H266_PROFILE_INTRA,
  GST_H266_PROFILE_MAIN_12_STILL_PICTURE                = GST_H266_PROFILE_MAIN_12 | GST_H266_PROFILE_STILL_PICTURE,
  GST_H266_PROFILE_MAIN_12_444_STILL_PICTURE            = GST_H266_PROFILE_MAIN_12_444 | GST_H266_PROFILE_STILL_PICTURE,
  GST_H266_PROFILE_MAIN_16_444_STILL_PICTURE            = GST_H266_PROFILE_MAIN_16_444 | GST_H266_PROFILE_STILL_PICTURE,

  /* end of the profiles */
  GST_H266_PROFILE_MAX
} GstH266Profile;

/**
 * GstH266Level:
 *
 * H.266 level.
 *
 * Since: 1.26
 */
typedef enum
{
  GST_H266_LEVEL_L1_0 = 16,
  GST_H266_LEVEL_L2_0 = 32,
  GST_H266_LEVEL_L2_1 = 35,
  GST_H266_LEVEL_L3_0 = 48,
  GST_H266_LEVEL_L3_1 = 51,
  GST_H266_LEVEL_L4_0 = 64,
  GST_H266_LEVEL_L4_1 = 67,
  GST_H266_LEVEL_L5_0 = 80,
  GST_H266_LEVEL_L5_1 = 83,
  GST_H266_LEVEL_L5_2 = 86,
  GST_H266_LEVEL_L6_0 = 96,
  GST_H266_LEVEL_L6_1 = 99,
  GST_H266_LEVEL_L6_2 = 102,
  GST_H266_LEVEL_L6_3 = 105,
} GstH266Level;

/**
 * GstH266NalUnitType:
 *
 * Indicates the types of H266 Nal Units as
 * table 5 - NAL unit type codes and NAL unit type classes.
 *
 * @GST_H266_NAL_SLICE_TRAIL: Coded slice of a trailing picture or subpicture.
 * @GST_H266_NAL_SLICE_STSA: Coded slice of an STSA picture or subpicture.
 * @GST_H266_NAL_SLICE_RADL: Coded slice of a RADL picture or subpicture.
 * @GST_H266_NAL_SLICE_RASL: Coded slice of a RASL picture or subpicture.
 * @GST_H266_NAL_SLICE_IDR_W_RADL: Coded slice of an IDR picture or subpicture.
 * @GST_H266_NAL_SLICE_IDR_N_LP: Coded slice of an IDR picture or subpicture.
 * @GST_H266_NAL_SLICE_CRA: Coded slice of a CRA picture or subpicture.
 * @GST_H266_NAL_SLICE_GDR: Coded slice of a GDR picture or subpicture.
 * @GST_H266_NAL_OPI: Operating point information.
 * @GST_H266_NAL_DCI: Decoding capability information.
 * @GST_H266_NAL_VPS: Video parameter set(VPS).
 * @GST_H266_NAL_SPS: Sequence parameter set (SPS).
 * @GST_H266_NAL_PPS: Picture parameter set (PPS).
 * @GST_H266_NAL_PREFIX_APS: Prefix Adaptation parameter set (APS).
 * @GST_H266_NAL_SUFFIX_APS: Suffix Adaptation parameter set (APS).
 * @GST_H266_NAL_PH: Picture header (PH).
 * @GST_H266_NAL_AUD: AU delimiter.
 * @GST_H266_NAL_EOS: End of sequence (EOS).
 * @GST_H266_NAL_EOB: End of bitstream (EOB).
 * @GST_H266_NAL_PREFIX_SEI: Prefix Supplemental enhancement information.
 * @GST_H266_NAL_SUFFIX_SEI: Suffix Suppliemental enhancement information.
 * @GST_H266_NAL_FD: Filler data (FD).
 *
 * Since: 1.26
 */
typedef enum
{
  GST_H266_NAL_SLICE_TRAIL      = 0,
  GST_H266_NAL_SLICE_STSA       = 1,
  GST_H266_NAL_SLICE_RADL       = 2,
  GST_H266_NAL_SLICE_RASL       = 3,
  GST_H266_NAL_SLICE_IDR_W_RADL = 7,
  GST_H266_NAL_SLICE_IDR_N_LP   = 8,
  GST_H266_NAL_SLICE_CRA        = 9,
  GST_H266_NAL_SLICE_GDR        = 10,
  GST_H266_NAL_OPI              = 12,
  GST_H266_NAL_DCI              = 13,
  GST_H266_NAL_VPS              = 14,
  GST_H266_NAL_SPS              = 15,
  GST_H266_NAL_PPS              = 16,
  GST_H266_NAL_PREFIX_APS       = 17,
  GST_H266_NAL_SUFFIX_APS       = 18,
  GST_H266_NAL_PH               = 19,
  GST_H266_NAL_AUD              = 20,
  GST_H266_NAL_EOS              = 21,
  GST_H266_NAL_EOB              = 22,
  GST_H266_NAL_PREFIX_SEI       = 23,
  GST_H266_NAL_SUFFIX_SEI       = 24,
  GST_H266_NAL_FD               = 25,
} GstH266NalUnitType;

/**
 * GstH266SEIPayloadType:
 *
 * The type of SEI message.
 * More other SEIs are specified in Rec.ITU-T H.274 | ISO/IEC 23002-7.
 *
 * @GST_H266_SEI_BUF_PERIOD: Buffering Period SEI Message.
 * @GST_H266_SEI_PIC_TIMING: Picture Timing SEI Message.
 * @GST_H266_SEI_REGISTERED_USER_DATA: Registered user data.
 * @GST_H266_SEI_USER_DATA_UNREGISTERED: User data Unregistered.
 * @GST_H266_SEI_DU_INFO: DU Information SEI Message.
 * @GST_H266_SEI_SCALABLE_NETING: Scalable Nesting SEI Message.
 * @GST_H266_SEI_FRAME_FIELD_INFO: Frame Field Info SEI Message.
 * @GST_H266_SEI_SUBPIC_LEVEL_INFO: Subpicture Level Information SEI.
 *
 * Since: 1.26
 */
typedef enum
{
  GST_H266_SEI_BUF_PERIOD = 0,
  GST_H266_SEI_PIC_TIMING = 1,
  GST_H266_SEI_REGISTERED_USER_DATA = 4,
  GST_H266_SEI_USER_DATA_UNREGISTERED = 5,
  GST_H266_SEI_DU_INFO = 130,
  GST_H266_SEI_SCALABLE_NESTING = 133,
  GST_H266_SEI_FRAME_FIELD_INFO = 168,
  GST_H266_SEI_SUBPIC_LEVEL_INFO = 203,
  /* and more...  */
} GstH266SEIPayloadType;

/**
 * GstH266SliceType:
 *
 * Types of Picture slice.
 *
 * @GST_H266_B_SLICE: B slice type.
 * @GST_H266_P_SLICE: P slice type.
 * @GST_H266_I_SLICE: I slice type.
 *
 * Since: 1.26
 */
typedef enum
{
  GST_H266_B_SLICE = 0,
  GST_H266_P_SLICE = 1,
  GST_H266_I_SLICE = 2
} GstH266SliceType;

/**
 * GstH266APSType:
 *
 * Indicates the types of Adaptation parameter set (APS) as
 * Table 6 - APS parameters type codes and types of APS parameters.
 *
 * @GST_H266_ALF_APS: ALF parameters.
 * @GST_H266_LMCS_APS: LMCS parameters.
 * @GST_H266_SCALING_APS: Scaling list parameters.
 *
 * Since: 1.26
 */
typedef enum
{
  GST_H266_ALF_APS      = 0,
  GST_H266_LMCS_APS     = 1,
  GST_H266_SCALING_APS  = 2,
  /* end of the aps type */
  GST_H266_APS_TYPE_MAX = 3
} GstH266APSType;

typedef struct _GstH266Parser                   GstH266Parser;
typedef struct _GstH266NalUnit                  GstH266NalUnit;

typedef struct _GstH266VPS                      GstH266VPS;
typedef struct _GstH266SPS                      GstH266SPS;
typedef struct _GstH266PPS                      GstH266PPS;
typedef struct _GstH266APS                      GstH266APS;
typedef struct _GstH266ProfileTierLevel         GstH266ProfileTierLevel;
typedef struct _GstH266GeneralConstraintsInfo   GstH266GeneralConstraintsInfo;
typedef struct _GstH266DPBParameters            GstH266DPBParameters;
typedef struct _GstH266GeneralHRDParameters     GstH266GeneralHRDParameters;
typedef struct _GstH266OLSHRDParameters         GstH266OLSHRDParameters;
typedef struct _GstH266SubLayerHRDParameters    GstH266SubLayerHRDParameters;
typedef struct _GstH266HRDParams                GstH266HRDParams;
typedef struct _GstH266VUIParams                GstH266VUIParams;
typedef struct _GstH266SPSRangeExtensionParams  GstH266SPSRangeExtensionParams;

typedef struct _GstH266ALF                      GstH266ALF;
typedef struct _GstH266LMCS                     GstH266LMCS;
typedef struct _GstH266ScalingList              GstH266ScalingList;

typedef struct _GstH266PredWeightTable          GstH266PredWeightTable;
typedef struct _GstH266RefPicListStruct         GstH266RefPicListStruct;
typedef struct _GstH266RefPicLists              GstH266RefPicLists;
typedef struct _GstH266SliceHdr                 GstH266SliceHdr;
typedef struct _GstH266PicHdr                   GstH266PicHdr;
typedef struct _GstH266AUD                      GstH266AUD;
typedef struct _GstH266OPI                      GstH266OPI;
typedef struct _GstH266DCI                      GstH266DCI;

typedef struct _GstH266BufferingPeriod          GstH266BufferingPeriod;
typedef struct _GstH266PicTiming                GstH266PicTiming;
typedef struct _GstH266DUInfo                   GstH266DUInfo;
typedef struct _GstH266ScalableNesting          GstH266ScalableNesting;
typedef struct _GstH266SubPicLevelInfo          GstH266SubPicLevelInfo;
typedef struct _GstH266FrameFieldInfo           GstH266FrameFieldInfo;
typedef struct _GstH266SEIMessage               GstH266SEIMessage;
typedef struct _GstH266DecoderConfigRecordNalUnitArray GstH266DecoderConfigRecordNalUnitArray;
typedef struct _GstH266PTLRecord                GstH266PTLRecord;
typedef struct _GstH266DecoderConfigRecord      GstH266DecoderConfigRecord;

/**
 * GstH266NalUnit:
 *
 * Structure defining the H266 Nal unit headers.
 *
 * @type: A #GstH266NalUnitType.
 * @layer_id: A nal unit layer id.
 * @temporal_id_plus1: A nal unit temporal identifier.
 * @size: The size of the nal unit starting from @offset.
 * @offset: The offset of the actual start of the nal unit.
 * @sc_offset:The offset of the start code of the nal unit.
 * @valid: If the nal unit is valid, which mean it has
 *  already been parsed.
 * @data: The data from which the Nalu has been parsed.
 * @header_bytes: The size of the NALU header in bytes.
 *
 * Since: 1.26
 */
struct _GstH266NalUnit
{
  guint8 type;
  guint8 layer_id;
  guint8 temporal_id_plus1;

  /* calculated values */
  guint size;
  guint offset;
  guint sc_offset;
  gboolean valid;

  guint8 *data;
  guint8 header_bytes;
};

/**
 * GstH266GeneralConstraintsInfo:
 *
 * Structure defining the H266 general constraints info.
 *
 * @present_flag: specifies whether additional syntax elements are present.
 * @intra_only_constraint_flag: specifies whether sh_slice_type for all slices
 *  in OlsInScope shall be equal to 2.
 * @all_layers_independent_constraint_flag: specifies whether the
 *  vps_all_independent_layers_flag for all pictures in OlsInScope
 *  shall be equal to 1.
 * @one_au_only_constraint_flag: specifies whether there is only one
 *  AU in OlsInScope.
 * @sixteen_minus_max_bitdepth_constraint_idc: specifies whether
 *  sps_bitdepth_minus8 plus 8 for all pictures in OlsInScope shall be in the
 *  range of 0 to 16 - gci_sixteen_minus_max_bitdepth_constraint_idc, inclusive.
 * @three_minus_max_chroma_format_constraint_idc: specifies whether the
 *  sps_chroma_format_idc for all pictures in OlsInScope shall be in the range
 *  of 0 to 3 - gci_three_minus_max_chroma_format_constraint_idc, inclusive.
 * @no_mixed_nalu_types_in_pic_constraint_flag: specifies whether the
 *  pps_mixed_nalu_types_in_pic_flag for all pictures in OlsInScope shall
 *  be equal to 0.
 * @no_trail_constraint_flag: specifies whether there shall be no NAL unit
 *  with nuh_unit_type equal to TRAIL_NUT present in OlsInScope.
 * @no_stsa_constraint_flag: specifies whether there shall be no NAL unit with
 *  nuh_unit_type equal to STSA_NUT present in OlsInScope.
 * @no_rasl_constraint_flag: specifies whether there shall be no NAL unit with
 *  nuh_unit_type equal to RASL_NUT present in OlsInScope.
 * @no_radl_constraint_flag: specifies whether there shall be no NAL unit with
 *  nuh_unit_type equal to RADL_NUT present in OlsInScope.
 * @no_idr_constraint_flag: specifies whether there shall be no NAL unit with
 *  nuh_unit_type equal to IDR_W_RADL or IDR_N_LP present in OlsInScope.
 * @no_cra_constraint_flag: specifies whether there shall be no NAL unit with
 *  nuh_unit_type equal to CRA_NUT present in OlsInScope.
 * @no_gdr_constraint_flag: specifies whether sps_gdr_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_aps_constraint_flag: specifies whether there shall be no NAL unit with
 *  nuh_unit_type equal to PREFIX_APS_NUT or SUFFIX_APS_NUT present in
 *  OlsInScope.
 * @no_idr_rpl_constraint_flag: specifies whether sps_idr_rpl_present_flag for
 *  all pictures in OlsInScope shall be equal to 0.
 * @one_tile_per_pic_constraint_flag: specifies whether each picture in
 *  OlsInScope shall contain only one tile.
 * @pic_header_in_slice_header_constraint_flag: specifies whether each picture
 *  in OlsInScope shall contain only one slice and the value of
 *  sh_picture_header_in_slice_header_flag in each slice in OlsInScope shall
 *  be equal to 1.
 * @one_slice_per_pic_constraint_flag: specifies whether each picture in
 *  OlsInScope shall contain only one slice.
 * @no_rectangular_slice_constraint_flag: specifies whether pps_rect_slice_flag
 *  for all pictures in OlsInScope shall be equal to 0.
 * @one_slice_per_subpic_constraint_flag: specifies whether the value of
 *  pps_single_slice_per_subpic_flag for all pictures in OlsInScope shall
 *  be equal to 1.
 * @no_subpic_info_constraint_flag: specifies whether sps_subpic_info_present_flag
 *  for all pictures in OlsInScope shall be equal to 0.
 * @three_minus_max_log2_ctu_size_constraint_idc: specifies whether
 *  sps_log2_ctu_size_minus5 for all pictures in OlsInScope shall be in the
 *  range of 0 to 3-gci_three_minus_max_log2_ctu_size_constraint_idc, inclusive.
 * @no_partition_constraints_override_constraint_flag: specifies whether
 *  sps_partition_constraints_override_enabled_flag for all pictures in
 *  OlsInScope shall be equal to 0.
 * @no_mtt_constraint_flag: specifies whether
 *  sps_max_mtt_hierarchy_depth_intra_slice_luma,
 *  sps_max_mtt_hierarchy_depth_inter_slice, and
 *  sps_max_mtt_hierarchy_depth_intra_slice_chroma for all pictures in
 *  OlsInScope shall be equal to 0.
 * @no_qtbtt_dual_tree_intra_constraint_flag: specifies whether
 *  sps_qtbtt_dual_tree_intra_flag for all pictures in OlsInScope shall
 *  be equal to 0.
 * @no_palette_constraint_flag: specifies whether sps_palette_enabled_flag
 *  for all pictures in OlsInScope shall be equal to 0.
 * @no_ibc_constraint_flag: specifies whether sps_ibc_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_isp_constraint_flag: specifies whether sps_isp_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_mrl_constraint_flag: specifies whether sps_mrl_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_mip_constraint_flag: specifies whether sps_mip_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_cclm_constraint_flag: specifies whether sps_cclm_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_ref_pic_resampling_constraint_flag: specifies whether
 *  sps_ref_pic_resampling_enabled_flag for all pictures in OlsInScope shall
 *  be equal to 0.
 * @no_res_change_in_clvs_constraint_flag: specifies whether
 *  sps_res_change_in_clvs_allowed_flag for all pictures in OlsInScope shall
 *  be equal to 0.
 * @no_weighted_prediction_constraint_flag: specifies whether
 *  sps_weighted_pred_flag and sps_weighted_bipred_flag for all pictures in
 *  OlsInScope shall both be equal to 0.
 * @no_ref_wraparound_constraint_flag: specifies whether
 *  sps_ref_wraparound_enabled_flag for all pictures in OlsInScope shall be
 *  equal to 0.
 * @no_temporal_mvp_constraint_flag: specifies whether
 *  sps_temporal_mvp_enabled_flag for all pictures in OlsInScope shall be
 *  equal to 0.
 * @no_sbtmvp_constraint_flag: specifies whether sps_sbtmvp_enabled_flag
 *  for all pictures in OlsInScope shall be equal to 0.
 * @no_amvr_constraint_flag: specifies whether sps_amvr_enabled_flag for
 *  all pictures in OlsInScope shall be equal to 0.
 * @no_bdof_constraint_flag: specifies whether sps_bdof_enabled_flag for
 *  all pictures in OlsInScope shall be equal to 0.
 * @no_smvd_constraint_flag: specifies whether sps_smvd_enabled_flag for
 *  all pictures in OlsInScope shall be equal to 0.
 * @no_dmvr_constraint_flag: specifies whether sps_dmvr_enabled_flag for
 *  all pictures in OlsInScope shall be equal to 0.
 * @no_mmvd_constraint_flag: specifies whether sps_mmvd_enabled_flag for
 *  all pictures in OlsInScope shall be equal to 0.
 * @no_affine_motion_constraint_flag: specifies whether sps_affine_enabled_flag
 *  for all pictures in OlsInScope shall be equal to 0.
 * @no_prof_constraint_flag: specifies whether sps_affine_prof_enabled_flag for
 *  all pictures in OlsInScope shall be equal to 0.
 * @no_bcw_constraint_flag: specifies whether sps_bcw_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_ciip_constraint_flag: specifies whether sps_ciip_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_gpm_constraint_flag: specifies whether sps_gpm_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_luma_transform_size_64_constraint_flag: specifies whether
 *  sps_max_luma_transform_size_64_flag for all pictures in OlsInScope shall
 *  be equal to 0.
 * @no_transform_skip_constraint_flag: specifies whether
 *  sps_transform_skip_enabled_flag for all pictures in OlsInScope shall
 *  be equal to 0.
 * @no_bdpcm_constraint_flag: specifies whether sps_bdpcm_enabled_flag for
 *  all pictures in OlsInScope shall be equal to 0.
 * @no_mts_constraint_flag: specifies whether sps_mts_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_lfnst_constraint_flag: specifies whether sps_lfnst_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_joint_cbcr_constraint_flag: specifies whether sps_joint_cbcr_enabled_flag
 *  for all pictures in OlsInScope shall be equal to 0.
 * @no_sbt_constraint_flag: specifies whether sps_sbt_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_act_constraint_flag: specifies whether sps_act_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_explicit_scaling_list_constraint_flag: specifies whether
 *  sps_explicit_scaling_list_enabled_flag for all pictures in OlsInScope shall
 *  be equal to 0.
 * @no_dep_quant_constraint_flag: specifies whether sps_dep_quant_enabled_flag
 *  for all pictures in OlsInScope shall be equal to 0.
 * @no_sign_data_hiding_constraint_flag: specifies whether
 *  sps_sign_data_hiding_enabled_flag for all pictures in OlsInScope shall
 *  be equal to 0.
 * @no_cu_qp_delta_constraint_flag: specifies whether
 *  pps_cu_qp_delta_enabled_flag for all pictures in OlsInScope shall be
 *  equal to 0.
 * @no_chroma_qp_offset_constraint_flag: specifies whether
 *  pps_cu_chroma_qp_offset_list_enabled_flag for all pictures in OlsInScope
 *  shall be equal to 0.
 * @no_sao_constraint_flag: specifies whether sps_sao_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_alf_constraint_flag: specifies whether sps_alf_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_ccalf_constraint_flag: specifies whether sps_ccalf_enabled_flag for
 *  all pictures in OlsInScope shall be equal to 0.
 * @no_lmcs_constraint_flag: specifies whether sps_lmcs_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_ladf_constraint_flag: specifies whether sps_ladf_enabled_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @no_virtual_boundaries_constraint_flag: specifies whether
 *  sps_virtual_boundaries_enabled_flag for all pictures in OlsInScope shall
 *  be equal to 0.
 * @all_rap_pictures_constraint_flag: specifies whether all pictures in
 *  OlsInScope are GDR pictures with ph_recovery_poc_cnt equal to 0 or IRAP
 *  pictures.
 * @no_extended_precision_processing_constraint_flag: specifies whether
 *  sps_extended_precision_flag for all pictures in OlsInScope shall be
 *  equal to 0.
 * @no_ts_residual_coding_rice_constraint_flag: specifies whether
 *  sps_ts_residual_coding_rice_present_in_sh_flag for all pictures in
 *  OlsInScope should be equal to 0.
 * @no_rrc_rice_extension_constraint_flag: specifies whether
 *  sps_rrc_rice_extension_flag for all pictures in OlsInScope shall be
 *  equal to 0.
 * @no_persistent_rice_adaptation_constraint_flag: specifies whether
 *  sps_persistent_rice_adaptation_enabled_flag for all pictures in OlsInScope
 *  shall be equal to 0.
 * @no_reverse_last_sig_coeff_constraint_flag: specifies whether
 *  sps_reverse_last_sig_coeff_enabled_flag for all pictures in OlsInScope
 *  shall be equal to 0.
 * @reserved_zero_bit: the reserved bits.
 *
 * Since: 1.26
 */
struct _GstH266GeneralConstraintsInfo {
  guint8 present_flag;

  /* general */
  guint8 intra_only_constraint_flag;
  guint8 all_layers_independent_constraint_flag;
  guint8 one_au_only_constraint_flag;
  /* picture format */
  guint8 sixteen_minus_max_bitdepth_constraint_idc;
  guint8 three_minus_max_chroma_format_constraint_idc;
  /* NAL unit type related */
  guint8 no_mixed_nalu_types_in_pic_constraint_flag;
  guint8 no_trail_constraint_flag;
  guint8 no_stsa_constraint_flag;
  guint8 no_rasl_constraint_flag;
  guint8 no_radl_constraint_flag;
  guint8 no_idr_constraint_flag;
  guint8 no_cra_constraint_flag;
  guint8 no_gdr_constraint_flag;
  guint8 no_aps_constraint_flag;
  guint8 no_idr_rpl_constraint_flag;
  /* tile, slice, subpicture partitioning */
  guint8 one_tile_per_pic_constraint_flag;
  guint8 pic_header_in_slice_header_constraint_flag;
  guint8 one_slice_per_pic_constraint_flag;
  guint8 no_rectangular_slice_constraint_flag;
  guint8 one_slice_per_subpic_constraint_flag;
  guint8 no_subpic_info_constraint_flag;
  /* CTU and block partitioning */
  guint8 three_minus_max_log2_ctu_size_constraint_idc;
  guint8 no_partition_constraints_override_constraint_flag;
  guint8 no_mtt_constraint_flag;
  guint8 no_qtbtt_dual_tree_intra_constraint_flag;
  /* intra */
  guint8 no_palette_constraint_flag;
  guint8 no_ibc_constraint_flag;
  guint8 no_isp_constraint_flag;
  guint8 no_mrl_constraint_flag;
  guint8 no_mip_constraint_flag;
  guint8 no_cclm_constraint_flag;
  /* inter */
  guint8 no_ref_pic_resampling_constraint_flag;
  guint8 no_res_change_in_clvs_constraint_flag;
  guint8 no_weighted_prediction_constraint_flag;
  guint8 no_ref_wraparound_constraint_flag;
  guint8 no_temporal_mvp_constraint_flag;
  guint8 no_sbtmvp_constraint_flag;
  guint8 no_amvr_constraint_flag;
  guint8 no_bdof_constraint_flag;
  guint8 no_smvd_constraint_flag;
  guint8 no_dmvr_constraint_flag;
  guint8 no_mmvd_constraint_flag;
  guint8 no_affine_motion_constraint_flag;
  guint8 no_prof_constraint_flag;
  guint8 no_bcw_constraint_flag;
  guint8 no_ciip_constraint_flag;
  guint8 no_gpm_constraint_flag;
  /* transform, quantization, residual */
  guint8 no_luma_transform_size_64_constraint_flag;
  guint8 no_transform_skip_constraint_flag;
  guint8 no_bdpcm_constraint_flag;
  guint8 no_mts_constraint_flag;
  guint8 no_lfnst_constraint_flag;
  guint8 no_joint_cbcr_constraint_flag;
  guint8 no_sbt_constraint_flag;
  guint8 no_act_constraint_flag;
  guint8 no_explicit_scaling_list_constraint_flag;
  guint8 no_dep_quant_constraint_flag;
  guint8 no_sign_data_hiding_constraint_flag;
  guint8 no_cu_qp_delta_constraint_flag;
  guint8 no_chroma_qp_offset_constraint_flag;
  /* loop fitler */
  guint8 no_sao_constraint_flag;
  guint8 no_alf_constraint_flag;
  guint8 no_ccalf_constraint_flag;
  guint8 no_lmcs_constraint_flag;
  guint8 no_ladf_constraint_flag;
  guint8 no_virtual_boundaries_constraint_flag;
  /* additional bits */
  guint8 all_rap_pictures_constraint_flag;
  guint8 no_extended_precision_processing_constraint_flag;
  guint8 no_ts_residual_coding_rice_constraint_flag;
  guint8 no_rrc_rice_extension_constraint_flag;
  guint8 no_persistent_rice_adaptation_constraint_flag;
  guint8 no_reverse_last_sig_coeff_constraint_flag;
  /* reserved for future use */
  guint8 reserved_zero_bit[64];
};

/**
 * GstH266ProfileTierLevel:
 *
 * Structure defining the H266 profile, tier and level.
 *
 * @profile_idc: the profile id.
 * @tier_flag: specifies the main tier or high tier.
 * @level_idc: indicates a level to which OlsInScope conforms
 *  as specified in Annex A.
 * @frame_only_constraint_flag: specifies whether sps_field_seq_flag for all
 *  pictures in OlsInScope shall be equal to 0.
 * @multilayer_enabled_flag: specifies whether the CVSs of OlsInScope
 *  might contain more than one layer.
 * @general_constraints_info: the #GstH266GeneralConstraintsInfo contains
 *  the general constraints info.
 * @sublayer_level_present_flag: specifies whether level information is present
 *  in the profile_tier_level syntax structure for the sublayer representation.
 * @sublayer_level_idc: the sublayer level idc.
 * @num_sub_profiles: specifies the number of the general_sub_profile_idc[i]
 *  syntax elements.
 * @sub_profile_idc: specifies the i-th interoperability indicator registered
 *  as specified by Rec. ITU-T T.35
 *
 * Since: 1.26
 */
struct _GstH266ProfileTierLevel {
  GstH266Profile profile_idc;
  guint8 tier_flag;
  guint8 level_idc;
  guint8 frame_only_constraint_flag;
  guint8 multilayer_enabled_flag;

  GstH266GeneralConstraintsInfo general_constraints_info;

  guint8 sublayer_level_present_flag[GST_H266_MAX_SUBLAYERS - 1];
  guint8 sublayer_level_idc[GST_H266_MAX_SUBLAYERS - 1];
  guint8 num_sub_profiles;
  GstH266Profile sub_profile_idc[GST_H266_MAX_SUB_PROFILES];

  guint8 ptl_reserved_zero_bit;
};

/**
 * GstH266DPBParameters:
 *
 * Structure defining the H266 DPB parameters.
 *
 * @max_dec_pic_buffering_minus1: specifies the maximum required size of the
 *  DPB in units of picture storage buffers.
 * @max_num_reorder_pics: specifies the maximum allowed number of pictures of
 *  the OLS that can precede any picture in the OLS in decoding order and
 *  follow that picture in output.
 * @max_latency_increase_plus1: used to compute the value of MaxLatencyPictures,
 *  which specifies the maximum number of pictures in the OLS.
 *
 * Since: 1.26
 */
struct _GstH266DPBParameters
{
  guint8 max_dec_pic_buffering_minus1[GST_H266_MAX_SUBLAYERS];
  guint8 max_num_reorder_pics[GST_H266_MAX_SUBLAYERS];
  guint8 max_latency_increase_plus1[GST_H266_MAX_SUBLAYERS];
};

/**
 * GstH266GeneralHRDParameters:
 *
 * Structure defining the H266 HDR parameters.
 *
 * @num_units_in_tick: the number of time units of a clock operating at the
 *  frequency time_scale.
 * @time_scale: number of time units that pass in one second.
 * @general_nal_hrd_params_present_flag: specifies whether NAL HRD parameters
 *  are present in the general_timing_hrd_parameters syntax structure.
 * @general_vcl_hrd_params_present_flag: specifies whether VCL HRD parameters
 *  are present in the general_timing_hrd_parameters syntax structure.
 * @general_same_pic_timing_in_all_ols_flag: specifies whether the
 *  non-scalable-nested PT SEI message in each AU applies to the AU for any
 *  OLS in the bitstream and no scalable-nested PT SEI messages are present.
 * @general_du_hrd_params_present_flag: specifies whether DU level HRD
 *  parameters are present and the HRD could operate at the AU level or DU level.
 * @tick_divisor_minus2: specifies the clock sub-tick.
 * @bit_rate_scale: specifies the maximum input bit rate of the CPB.
 * @cpb_size_scale: specifies the CPB size of the CPB.
 * @cpb_size_du_scale: specifies the CPB size of the CPB at du level.
 * @hrd_cpb_cnt_minus1: plus 1 specifies the number of alternative CPB
 *  delivery schedules.
 *
 * Since: 1.26
 */
struct _GstH266GeneralHRDParameters
{
  guint32 num_units_in_tick;
  guint32 time_scale;
  guint8 general_nal_hrd_params_present_flag;
  guint8 general_vcl_hrd_params_present_flag;
  guint8 general_same_pic_timing_in_all_ols_flag;
  guint8 general_du_hrd_params_present_flag;
  guint8 tick_divisor_minus2;
  guint8 bit_rate_scale;
  guint8 cpb_size_scale;
  guint8 cpb_size_du_scale;
  guint8 hrd_cpb_cnt_minus1;
};

/**
 * GstH266SubLayerHRDParameters:
 *
 * Structure defining the H266 sub layer HDR parameters.
 *
 * @bit_rate_value_minus1: specifies the maximum input bit rate for the CPB.
 * @cpb_size_value_minus1: together with cpb_size_scale to specify the CPB size.
 * @cpb_size_du_value_minus1: together with cpb_size_du_scale to specify
 *  the CPB size.
 * @bit_rate_du_value_minus1: specifies the maximum input bit rate for the CPB.
 * @cbr_flag: specifies whether to decode this bitstream by the HRD using
 *  the CPB specification.
 * @bit_rate: the calculated bit rate.
 * @cpb_size: the calculated cpb size.
 *
 * Since: 1.26
 */
struct _GstH266SubLayerHRDParameters
{
  guint32 bit_rate_value_minus1[GST_H266_MAX_CPB_CNT];
  guint32 cpb_size_value_minus1[GST_H266_MAX_CPB_CNT];
  guint32 cpb_size_du_value_minus1[GST_H266_MAX_CPB_CNT];
  guint32 bit_rate_du_value_minus1[GST_H266_MAX_CPB_CNT];
  guint8 cbr_flag[GST_H266_MAX_CPB_CNT];
  /* calculated values */
  guint32 bit_rate[GST_H266_MAX_CPB_CNT];
  guint32 cpb_size[GST_H266_MAX_CPB_CNT];
};

/**
 * GstH266OLSHRDParameters:
 *
 * Structure defining the H266 OLS HDR parameters.
 *
 * @fixed_pic_rate_general_flag: indicates the temporal distance between the
 *  HRD output times of consecutive pictures in output order is constrained as
 *  specified in this clause using the variable DpbOutputElementalInterval[n].
 * @fixed_pic_rate_within_cvs_flag: indicates the temporal distance between the
 *  HRD output times of consecutive pictures in output order is constrained as
 *  specified in this clause using the variable DpbOutputElementalInterval[n].
 * @elemental_duration_in_tc_minus1: specifies the temporal distance between
 *  the elemental units that specify the HRD output times of consecutive
 *  pictures in output order.
 * @low_delay_hrd_flag: specifies the HRD operational mode as specified
 *  in Annex C.
 * @nal_sub_layer_hrd_parameters: sub layer nal #GstH266SubLayerHRDParameters.
 * @vcl_sub_layer_hrd_parameters: sub layer vcl #GstH266SubLayerHRDParameters.
 *
 * Since: 1.26
 */
struct _GstH266OLSHRDParameters
{
  guint8 fixed_pic_rate_general_flag[GST_H266_MAX_SUBLAYERS];
  guint8 fixed_pic_rate_within_cvs_flag[GST_H266_MAX_SUBLAYERS];
  guint16 elemental_duration_in_tc_minus1[GST_H266_MAX_SUBLAYERS];
  guint8 low_delay_hrd_flag[GST_H266_MAX_SUBLAYERS];
  GstH266SubLayerHRDParameters nal_sub_layer_hrd_parameters[GST_H266_MAX_SUBLAYERS];
  GstH266SubLayerHRDParameters vcl_sub_layer_hrd_parameters[GST_H266_MAX_SUBLAYERS];
};

/**
 * GstH266VPS:
 *
 * Structure defining the H266 VPS.
 *
 * @vps_id: provides an identifier for the VPS for reference by other syntax
 *  elements.
 * @max_layers_minus1: specifies the number of layers specified by the VPS.
 * @max_sublayers_minus1: specifies the maximum number of temporal sublayers
 *  that may be present in a layer specified by the VPS.
 * @default_ptl_dpb_hrd_max_tid_flag: specifies whether the syntax elements
 *  vps_ptl_max_tid, vps_dpb_max_tid, and vps_hrd_max_tid are present.
 * @all_independent_layers_flag: specifies whether all layers specified by the
 *  VPS are independently coded without using inter-layer prediction.
 * @layer_id: specifies the nuh_layer_id value of the i-th layer.
 * @independent_layer_flag: specifies whether the layer with index i does not
 *  use inter-layer prediction.
 * @max_tid_ref_present_flag: specifies whether the syntax element
 *  vps_max_tid_il_ref_pics_plus1 could be present.
 * @direct_ref_layer_flag: specifies whether the layer with index j is not a
 *  direct reference layer for the layer with index i.
 * @max_tid_il_ref_pics_plus1: specifies whether the pictures of the j-th layer
 *  that are neither IRAP pictures nor GDR pictures with ph_recovery_poc_cnt
 *  equal to 0 are not used as ILRPs for decoding of pictures of the i-th layer.
 * @each_layer_is_an_ols_flag: specifies whether each OLS specified by the VPS
 *  contains only one layer and each layer specified by the VPS is an OLS with
 *  the single included layer being the only output layer.
 * @ols_mode_idc: specifies whether the total number of OLSs specified by the
 *  VPS is equal to vps_max_layers_minus1 + 1.
 * @total_num_olss: specifies the total number of OLSs specified by the VPS.
 * @num_multi_layer_olss: specifies the number of multi-layer OLSs (i.e., OLSs
 *  that contain more than one layer).
 * @multi_layer_ols_idx: specifies the index to the list of multi-layer OLSs
 *  for the i-th OLS.
 * @num_layers_in_ols: specifies the number of layers in the i-th OLS.
 * @layer_id_in_ols: specifies the nuh_layer_id value of the j-th layer in
 *  the i-th OLS.
 * @num_output_layer_sets_minus2: specifies the total number of OLSs
 *  specified by the VPS when vps_ols_mode_idc is equal to 2.
 * @ols_output_layer_flag: specifies whether the layer with nuh_layer_id
 *  equal to vps_layer_id[j] is an output layer of the i-th OLS when
 *  vps_ols_mode_idc is equal to 2.
 * @num_output_layers_in_ols: specifies the number of output layers in
 *  the i-th OLS.
 * @output_layer_id_in_ols: specifies the nuh_layer_id value of the j-th
 *  output layer in the i-th OLS.
 * @num_sub_layers_in_layer_in_ols: specifies the number of sublayers in the
 *  j-th layer in the i-th OLS.
 * @num_ptls_minus1: specifies the number of profile_tier_level
 *  syntax structures in the VPS.
 * @pt_present_flag: specifies whether profile, tier, and general constraints
 *  information are present in the i-th profile_tier_level syntax structure
 *  in the VPS.
 * @ptl_max_tid: specifies the TemporalId of the highest sublayer representation.
 * @profile_tier_level: specifies the profile, tier and level using
 *  #GstH266ProfileTierLevel.
 * @ols_ptl_idx: specifies the index of the profile_tier_level syntax
 *  structure that applies to the i-th OLS.
 * @num_dpb_params_minus1: specifies the number of dpb_parameters syntax
 *  strutcures in the VPS.
 * @sublayer_dpb_params_present_flag: is used to control the presence of
 *  dpb_max_dec_pic_buffering_minus1[j], dpb_max_num_reorder_pics[j], and
 *  dpb_max_latency_increase_plus1[j] syntax elements in the dpb_parameters
 *  syntax strucures in the VPS.
 * @dpb_max_tid: specifies the TemporalId of the highest sublayer representation
 *  for which the DPB parameters could be present in the i-th dpb_parameters
 *  syntax strutcure in the VPS.
 * @dpb: the DPB parameters using #GstH266DPBParameters.
 * @ols_dpb_pic_width: specifies the width of each picture storage buffer for
 *  the i-th multi-layer OLS.
 * @ols_dpb_pic_height: specifies the height of each picture storage buffer
 *  for the i-th multi-layer OLS.
 * @ols_dpb_chroma_format: specifies the greatest allowed value of
 *  sps_chroma_format_idc for all SPSs.
 * @ols_dpb_bitdepth_minus8: specifies the greatest allowed value of
 *  sps_bitdepth_minus8 for all SPSs.
 * @ols_dpb_params_idx: specifies the index of the dpb_parameters syntax
 *  structure that applies to the i-th multi-layer OLS.
 * @timing_hrd_params_present_flag: specifies whether the VPS contains a
 *  general_timing_hrd_parameters syntax structure and other HRD parameters.
 * @general_hrd_params: HRD parameters in #GstH266GeneralHRDParameters.
 * @sublayer_cpb_params_present_flag: specifies that the i-th
 *  ols_timing_hrd_parameters syntax structure in the VPS contains HRD
 *  parameters for the sublayer representations.
 * @num_ols_timing_hrd_params_minus1: specifies the number of
 *  ols_timing_hrd_parameters syntax structures present in the VPS.
 * @hrd_max_tid: specifies the TemporalId of the highest sublayer representation
 *  for which the HRD parameters are contained in the i-th
 *  ols_timing_hrd_parameters syntax structure.
 * @ols_hrd_params: OLS HRD parameters using #GstH266OLSHRDParameters.
 * @ols_timing_hrd_idx: specifies the index of the ols_timing_hrd_parameters
 *  syntax structure that applies to the i-th multi-layer OLS.
 * @extension_flag: specifies whether no vps_extension_data_flag syntax elements
 *  are present in the VPS RBSP syntax structure.
 * @extension_data: could have any value, it is not defined in this version of
 *  this Specification.
 * @valid: whether this VPS is valid.
 *
 * Since: 1.26
 */
struct _GstH266VPS {
  guint8 vps_id;

  guint8 max_layers_minus1;
  guint8 max_sublayers_minus1;

  guint8 default_ptl_dpb_hrd_max_tid_flag;
  guint8 all_independent_layers_flag;

  guint8 layer_id[GST_H266_MAX_LAYERS];
  guint8 independent_layer_flag[GST_H266_MAX_LAYERS];
  guint8 max_tid_ref_present_flag[GST_H266_MAX_LAYERS];
  guint8 direct_ref_layer_flag[GST_H266_MAX_LAYERS][GST_H266_MAX_LAYERS];
  guint8 max_tid_il_ref_pics_plus1[GST_H266_MAX_LAYERS][GST_H266_MAX_LAYERS];
  guint8 each_layer_is_an_ols_flag;
  guint8 ols_mode_idc;
  guint total_num_olss;
  guint num_multi_layer_olss;
  guint16 multi_layer_ols_idx[GST_H266_MAX_TOTAL_NUM_OLSS];
  guint16 num_layers_in_ols[GST_H266_MAX_TOTAL_NUM_OLSS];
  guint8 layer_id_in_ols[GST_H266_MAX_TOTAL_NUM_OLSS][GST_H266_MAX_LAYERS];
  guint8 num_output_layer_sets_minus2;
  guint8 ols_output_layer_flag[GST_H266_MAX_TOTAL_NUM_OLSS][GST_H266_MAX_LAYERS];
  guint16 num_output_layers_in_ols[GST_H266_MAX_TOTAL_NUM_OLSS];
  guint8 output_layer_id_in_ols[GST_H266_MAX_TOTAL_NUM_OLSS][GST_H266_MAX_LAYERS];
  guint8 num_sub_layers_in_layer_in_ols[GST_H266_MAX_TOTAL_NUM_OLSS][GST_H266_MAX_LAYERS];

  guint8 num_ptls_minus1;
  guint8 pt_present_flag[GST_H266_MAX_PTLS];
  guint8 ptl_max_tid[GST_H266_MAX_PTLS];
  GstH266ProfileTierLevel profile_tier_level[GST_H266_MAX_PTLS];
  guint8 ols_ptl_idx[GST_H266_MAX_TOTAL_NUM_OLSS];

  guint8 num_dpb_params_minus1;
  guint8 sublayer_dpb_params_present_flag;
  guint8 dpb_max_tid[GST_H266_MAX_TOTAL_NUM_OLSS];
  GstH266DPBParameters dpb[GST_H266_MAX_TOTAL_NUM_OLSS];
  guint16 ols_dpb_pic_width[GST_H266_MAX_TOTAL_NUM_OLSS];
  guint16 ols_dpb_pic_height[GST_H266_MAX_TOTAL_NUM_OLSS];
  guint8 ols_dpb_chroma_format[GST_H266_MAX_TOTAL_NUM_OLSS];
  guint8 ols_dpb_bitdepth_minus8[GST_H266_MAX_TOTAL_NUM_OLSS];
  guint8 ols_dpb_params_idx[GST_H266_MAX_TOTAL_NUM_OLSS];

  guint8 timing_hrd_params_present_flag;
  GstH266GeneralHRDParameters general_hrd_params;
  guint8 sublayer_cpb_params_present_flag;
  guint8 num_ols_timing_hrd_params_minus1;
  guint8 hrd_max_tid[GST_H266_MAX_TOTAL_NUM_OLSS];
  GstH266OLSHRDParameters ols_hrd_params[GST_H266_MAX_TOTAL_NUM_OLSS];
  guint8 ols_timing_hrd_idx[GST_H266_MAX_TOTAL_NUM_OLSS];

  /* Reserve some data for future usage. */
  guint8 extension_flag;
  guint8 extension_data[64];

  gboolean valid;
};

/**
 * GstH266RefPicListStruct:
 *
 * Structure defining the H266 reference picture list.
 *
 * @num_ref_entries: specifies the number of entries in the
 *  ref_pic_list_struct(listIdx, rplsIdx) syntax structure.
 * @ltrp_in_header_flag: specifies whether the POC LSBs of the LTRP entries
 *  indicated in the ref_pic_list_struct(listIdx, rplsIdx) syntax structure
 *  are present in the same syntax structure.
 * @inter_layer_ref_pic_flag: specifies whether the i-th entry in the
 *  ref_pic_list_struct(listIdx, rplsIdx) syntax structure is an ILRP entry.
 * @st_ref_pic_flag: specifies whether the i-th entry in the
 *  ref_pic_list_struct(listIdx, rplsIdx) syntax structure is an STRP entry.
 * @abs_delta_poc_st: specifies the value of the variable
 *  AbsDeltaPocSt[listIdx][rplsIdx][i].
 * @strp_entry_sign_flag: specifies whether DeltaPocValSt[listIdx][rplsIdx]
 *  is greater than or equal to 0.
 * @rpls_poc_lsb_lt: specifies the value of the picture order count modulo
 *  MaxPicOrderCntLsb of the picture referred to.
 * @ilrp_idx: specifies the index of the ILRP entry of the i-th entry in the
 *  ref_pic_list_struct.
 * @num_short_term_pic: the number of short term reference picture.
 * @num_long_term_pic: the number long term reference picture.
 * @num_inter_layer_pic: the number of inter layer reference picture.
 * @delta_poc_val_st: the calculated DeltaPocValSt value.
 *
 * Since: 1.26
 */
struct _GstH266RefPicListStruct {
  guint8 num_ref_entries;
  guint8 ltrp_in_header_flag;
  guint8 inter_layer_ref_pic_flag[GST_H266_MAX_REF_ENTRIES];
  guint8 st_ref_pic_flag[GST_H266_MAX_REF_ENTRIES];
  guint16 abs_delta_poc_st[GST_H266_MAX_REF_ENTRIES];
  guint8 strp_entry_sign_flag[GST_H266_MAX_REF_ENTRIES];
  guint8 rpls_poc_lsb_lt[GST_H266_MAX_REF_ENTRIES];
  guint8 ilrp_idx[GST_H266_MAX_REF_ENTRIES];
  guint num_short_term_pic;
  guint num_long_term_pic;
  guint num_inter_layer_pic;
  gint16 delta_poc_val_st[GST_H266_MAX_REF_ENTRIES];
};

/**
 * GstH266RefPicLists:
 *
 * Structure defining the H266 reference picture lists.
 *
 * @rpl_sps_flag: specifies whether RPL i in ref_pic_lists is derived based
 *  on one of the ref_pic_list_struct(listIdx, rplsIdx) syntax structures
 *  with listIdx equal to i in the SPS.
 * @rpl_idx: specifies the index into the list of the
 *  ref_pic_list_struct(listIdx, rplsIdx) syntax structures.
 * @rpl_ref_list: reference list of #GstH266RefPicListStruct.
 * @poc_lsb_lt: specifies the value of the picture order count
 *  modulo MaxPicOrderCntLsb.
 * @delta_poc_msb_cycle_present_flag: specifies whether
 *  delta_poc_msb_cycle_lt[i][j] is present.
 * @delta_poc_msb_cycle_lt: specifies the value of the variable FullPocLt[i][j].
 *
 * Since: 1.26
 */
struct _GstH266RefPicLists {
  guint8 rpl_sps_flag[2];
  guint8 rpl_idx[2];
  GstH266RefPicListStruct rpl_ref_list[2];
  guint16 poc_lsb_lt[2][GST_H266_MAX_REF_ENTRIES];
  guint8  delta_poc_msb_cycle_present_flag[2][GST_H266_MAX_REF_ENTRIES];
  guint16 delta_poc_msb_cycle_lt[2][GST_H266_MAX_REF_ENTRIES];
};

/**
 * GstH266VUIParams:
 *
 * Structure defining the H266 VUI parameters.
 *
 * @progressive_source_flag: flag to indicate the progressive type of stream.
 * @interlaced_source_flag: flag to indicate the interlaced type of stream.
 * @non_packed_constraint_flag: indicate the presence of frame packing
 *  arrangement sei message
 * @non_projected_constraint_flag: flag to indicate the projected support.
 * @aspect_ratio_info_present_flag: specifies whether aspect_ratio_idc is present.
 * @aspect_ratio_constant_flag: specifies whether the ratio is constant.
 * @aspect_ratio_idc: specifies the value of the sample aspect ratio of
 *  the luma samples.
 * @sar_width: indicates the horizontal size of the sample aspect ratio.
 * @sar_height: indicates the vertical size of the sample aspect ratio.
 * @overscan_info_present_flag: specify whether the overscan_appropriate_flag
 *  is present.
 * @overscan_appropriate_flag: indicates whether the cropped decoded pictures
 *  output are suitable for display using overscan.
 * @colour_description_present_flag: specifies whether colour_primaries,
 *  transfer_characteristics and matrix_coefficients are present.
 * @colour_primaries: indicates the chromaticity coordinates of the source
 *  primaries.
 * @transfer_characteristics: indicates the opto-electronic
 *  transfer characteristic.
 * @matrix_coeffs: describes the matrix coefficients used in deriving
 *  luma and chroma signals.
 * @full_range_flag: indicates the full range of the color.
 * @chroma_loc_info_present_flag: specifies whether chroma_sample_loc_type_frame,
 *  chroma_sample_loc_type_top_field and chroma_sample_loc_type_bottom_field
 *  are present.
 * @chroma_sample_loc_type_frame: specify the location of chroma for the frame.
 * @chroma_sample_loc_type_top_field: specify the location of chroma for the
 *  top field.
 * @chroma_sample_loc_type_bottom_field: specify the location of chroma for the
 *  bottom field.
 * @par_n: calculated aspect ratio numerator value.
 * @par_d: calculated aspect ratio denominator value.
 *
 * Since: 1.26
 */
struct _GstH266VUIParams
{
  guint8 progressive_source_flag;
  guint8 interlaced_source_flag;
  guint8 non_packed_constraint_flag;
  guint8 non_projected_constraint_flag;

  guint8 aspect_ratio_info_present_flag;
  guint8 aspect_ratio_constant_flag;
  guint8 aspect_ratio_idc;

  guint16 sar_width;
  guint16 sar_height;

  guint8 overscan_info_present_flag;
  guint8 overscan_appropriate_flag;

  guint8 colour_description_present_flag;
  guint8 colour_primaries;
  guint8 transfer_characteristics;
  guint8 matrix_coeffs;
  guint8 full_range_flag;

  guint8 chroma_loc_info_present_flag;
  guint8 chroma_sample_loc_type_frame;
  guint8 chroma_sample_loc_type_top_field;
  guint8 chroma_sample_loc_type_bottom_field;

  /* extension_data */

  /* calculated values */
  guint par_n;
  guint par_d;
};

/**
 * GstH266SPSRangeExtensionParams:
 *
 * Structure defining the H266 SPS range extension parameters.
 *
 * @extended_precision_flag: specifies whether an extended dynamic range is
 *  used for transform coefficients.
 * @ts_residual_coding_rice_present_in_sh_flag: specifies whether
 *  sh_ts_residual_coding_rice_idx_minus1 may be present in slice_header
 *  syntax structures referring to the SPS.
 * @rrc_rice_extension_flag: specifies whether an alternative Rice parameter
 *  derivation is used.
 * @persistent_rice_adaptation_enabled_flag: specifies whether Rice parameter
 *  derivation is initialized at the start of each TU using statistics
 *  accumulated from previous TUs.
 * @reverse_last_sig_coeff_enabled_flag: specifies whether
 *  sh_reverse_last_sig_coeff_flag is present in slice_header syntax
 *  structures referring to the SPS.
 *
 * Since: 1.26
 */
struct _GstH266SPSRangeExtensionParams {
  guint8 extended_precision_flag;
  guint8 ts_residual_coding_rice_present_in_sh_flag;
  guint8 rrc_rice_extension_flag;
  guint8 persistent_rice_adaptation_enabled_flag;
  guint8 reverse_last_sig_coeff_enabled_flag;
};

/**
 * GstH266SPS:
 *
 * Structure defining the H266 SPS.
 *
 * @nuh_layer_id: specifies the identifier of the layer to which a VCL NAL unit
 *  belongs or the identifier of a layer to which a non-VCL NAL unit applies.
 * @sps_id: provides an identifier for the SPS for reference by other
 *  syntax elements.
 * @vps_id: specifies the VPS referred to by this SPS.
 * @vps: the #GstH266VPS this SPS refers to.
 * @max_sublayers_minus1: specifies the maximum number of temporal sublayers
 *  that could be present in each CLVS referring to the SPS.
 * @chroma_format_idc: specifies the chroma sampling relative to the
 *  luma sampling.
 * @log2_ctu_size_minus5: specifies the luma coding tree block size of each CTU.
 * @ctu_size: the calculated ctu size.
 * @ptl_dpb_hrd_params_present_flag: specifies whether a profile_tier_level
 *  syntax structure and a dpb_parameters syntax structure are present
 *  in the SPS.
 * @dpb: DPB parameters of #GstH266DPBParameters.
 * @profile_tier_level: the profile tier and level in #GstH266ProfileTierLevel.
 * @general_hrd_params: HRD parameters of #GstH266GeneralHRDParameters.
 * @ols_hrd_params: OLS HRD parameters of #GstH266OLSHRDParameters.
 * @gdr_enabled_flag: specifies whether GDR pictures are enabled and could
 *  be present in the CLVS.
 * @res_change_in_clvs_allowed_flag: specifies whether the picture spatial
 *  resolution might change within a CLVS.
 * @ref_pic_resampling_enabled_flag: specifies whether reference picture
 *  resampling is enabled.
 * @pic_width_max_in_luma_samples: specifies the maximum width, in units of
 *  luma samples, of each decoded picture.
 * @pic_height_max_in_luma_samples: specifies the maximum height, in units of
 *  luma samples, of each decoded picture.
 * @conformance_window_flag: indicates whether the conformance cropping window
 *  offset parameters follow next in the SPS.
 * @conf_win_left_offset: specify left offset of the cropping window that
 *  is applied to pictures.
 * @conf_win_right_offset: specify right offset of the cropping window that
 *  is applied to pictures.
 * @conf_win_top_offset: specify top offset of the cropping window that
 *  is applied to pictures.
 * @conf_win_bottom_offset: specify bottom offset of the cropping window that
 *  is applied to pictures.
 * @subpic_info_present_flag: specifies whether subpicture information is
 *  present for the CLVS and there might be one or more than one subpicture
 *  in each picture of the CLVS.
 * @num_subpics_minus1: specifies the number of subpictures in each picture
 *  in the CLVS.
 * @independent_subpics_flag: specifies whether all subpicture boundaries in
 *  the CLVS are treated as picture boundaries and there is no loop filtering
 *  across the subpicture boundaries.
 * @subpic_same_size_flag: specifies whether all subpictures in the CLVS have
 *  the same width and height.
 * @subpic_ctu_top_left_x: specifies horizontal position of top-left CTU of
 *  i-th subpicture in unit of CtbSizeY.
 * @subpic_ctu_top_left_y: specifies vertical position of top-left CTU of
 *  i-th subpicture in unit of CtbSizeY.
 * @subpic_width_minus1: specifies the width of the i-th subpicture in units
 *  of CtbSizeY.
 * @subpic_height_minus1: specifies the height of the i-th subpicture in
 *  units of CtbSizeY.
 * @subpic_treated_as_pic_flag: specifies whether the i-th subpicture of each
 *  coded picture in the CLVS is treated as a picture.
 * @loop_filter_across_subpic_enabled_flag: specifies whether in-loop filtering
 *  operations across subpicture boundaries is enabled and might be performed
 *  across the boundaries of the i-th subpicture.
 * @subpic_id: specifies the subpicture ID of the i-th subpicture.
 * @subpic_id_len_minus1: specifies the number of bits used to represent the
 *  syntax element sps_subpic_id[i].
 * @subpic_id_mapping_explicitly_signalled_flag: specifies whether the
 *  subpicture ID mapping is explicitly signalled.
 * @subpic_id_mapping_present_flag: specifies whether the subpicture ID mapping
 *  is signalled in the SPS.
 * @bitdepth_minus8: specifies the bit depth of the samples of the luma and
 *  chroma arrays.
 * @entropy_coding_sync_enabled_flag: specifies whether a specific synchronization
 *  process for context variables is invoked before decoding the CTU.
 * @entry_point_offsets_present_flag: specifies whether signalling for entry
 *  point offsets for tiles or tile-specific CTU rows could be present in the
 *  slice headers of pictures.
 * @log2_max_pic_order_cnt_lsb_minus4: specifies the value of the variable
 *  MaxPicOrderCntLsb.
 * @poc_msb_cycle_flag: specifies whether the ph_poc_msb_cycle_present_flag
 *  syntax element is present in PH syntax structures.
 * @poc_msb_cycle_len_minus1: specifies the length, in bits, of the
 *  ph_poc_msb_cycle_val syntax elements.
 * @num_extra_ph_bytes: specifies the number of bytes of extra bits in the PH
 *  syntax structure for coded pictures.
 * @extra_ph_bit_present_flag: specifies whether the i-th extra bit is present
 *  in PH syntax structures.
 * @num_extra_sh_bytes: specifies the number of bytes of extra bits in the
 *  slice headers for coded pictures.
 * @extra_sh_bit_present_flag: specifies whether the i-th extra bit is present
 *  in the slice headers of pictures.
 * @sublayer_dpb_params_flag: used to control the presence of
 *  dpb_max_dec_pic_buffering_minus1[i], dpb_max_num_reorder_pics[i],
 *  and dpb_max_latency_increase_plus1[i] syntax elements in the
 *  dpb_parameters syntax strucure.
 * @log2_min_luma_coding_block_size_minus2: specifies the minimum luma coding
 *  block size.
 * @partition_constraints_override_enabled_flag: specifies the presence of
 *  ph_partition_constraints_override_flag in PH syntax structures.
 * @log2_diff_min_qt_min_cb_intra_slice_luma: specifies the default difference
 *  between the base 2 logarithm of the minimum size in luma samples of a luma
 *  leaf block resulting from quadtree splitting of a CTU and the base 2
 *  logarithm of the minimum coding block size in luma samples.
 * @max_mtt_hierarchy_depth_intra_slice_luma: specifies the default maximum
 *  hierarchy depth for coding units resulting from multi-type tree splitting
 *  of a quadtree leaf in slices with sh_slice_type equal to 2(I).
 * @log2_diff_max_bt_min_qt_intra_slice_luma: specifies the default difference
 *  between the base 2 logarithm of the maximum size in luma samples of a luma
 *  coding block that can be split using a binary split and the base 2 logarithm
 *  of the minimum size in luma samples of a luma leaf block resulting from
 *  quadtree splitting.
 * @log2_diff_max_tt_min_qt_intra_slice_luma: specifies the default difference
 *  between the base 2 logarithm of the maximum size in luma samples of a luma
 *  coding block that can be split using a ternary split and the base 2
 *  logarithm of the minimum size in luma samples of a luma leaf block resulting
 *  from quadtree splitting.
 * @qtbtt_dual_tree_intra_flag: specifies whether each CTU is split into coding
 *  units with 64x64 luma samples using an implicit quadtree split, and these
 *  coding units are the root of two separate coding_tree syntax structure for
 *  luma and chroma.
 * @log2_diff_min_qt_min_cb_intra_slice_chroma: specifies the default difference
 *  between the base 2 logarithm of the minimum size in luma samples of a chroma
 *  leaf block resulting from quadtree splitting of a chroma CTU and the base 2
 *  logarithm of the minimum coding block size in luma samples for chroma CUs
 *  in slices with sh_slice_type equal to 2(I).
 * @max_mtt_hierarchy_depth_intra_slice_chroma: specifies the default maximum
 *  hierarchy depth for chroma coding units resulting from multi-type tree
 *  splitting of a chroma quadtree leaf in slices with sh_slice_type equal to 2(I).
 * @log2_diff_max_bt_min_qt_intra_slice_chroma: specifies the default difference
 *  between the base 2 logarithm of the maximum size in luma samples of a chroma
 *  coding block that can be split using a binary split and the base 2 logarithm
 *  of the minimum size in luma samples of a chroma leaf block resulting from
 *  quadtree splitting of a chroma CTU in slices with sh_slice_type equal to 2(I).
 * @log2_diff_max_tt_min_qt_intra_slice_chroma: specifies the default difference
 *  between the base 2 logarithm of the maximum size in luma samples of a chroma
 *  coding block that can be split using a ternary split and the base 2 logarithm
 *  of the minimum size in luma samples of a chroma leaf block resulting from
 *  quadtree splitting of a chroma CTU in slices with sh_slice_type equal to 2(I).
 * @log2_diff_min_qt_min_cb_inter_slice: specifies the default difference between
 *  the base 2 logarithm of the minimum size in luma samples of a luma leaf block
 *  resulting from quadtree splitting of a CTU and the base 2 logarithm of the
 *  minimum luma coding block size in luma samples for luma CUs in slices with
 *  sh_slice_type equal to 0(B) or 1(P).
 * @max_mtt_hierarchy_depth_inter_slice: specifies the default maximum hierarchy
 *  depth for coding units resulting from multi-type tree splitting of a quadtree
 *  leaf in slices with sh_slice_type equal to 0 (B) or 1 (P).
 * @log2_diff_max_bt_min_qt_inter_slice: specifies the default difference between
 *  the base 2 logarithm of the maximum size in luma samples of a luma coding
 *  block that can be split using a binary split and the base 2 logarithm of the
 *  minimum size in luma samples of a luma leaf block resulting from quadtree
 *  splitting of a CTU in slices with sh_slice_type equal to 0(B) or 1(P).
 * @log2_diff_max_tt_min_qt_inter_slice: specifies the default difference between
 *  the base 2 logarithm of the maximum size in luma samples of a luma coding
 *  block that can be split using a ternary split and the base 2 logarithm of
 *  the minimum size in luma samples of a luma leaf block resulting from quadtree
 *  splitting of a CTU in slices with sh_slice_type equal to 0(B) or 1(P).
 * @max_luma_transform_size_64_flag: specifies whether the maximum transform
 *  size in luma samples is equal to 64.
 * @transform_skip_enabled_flag: specifies whether transform_skip_flag could be
 *  present in the transform unit syntax.
 * @log2_transform_skip_max_size_minus2: specifies the maximum block size used
 *  for transform skip.
 * @bdpcm_enabled_flag: specifies whether intra_bdpcm_luma_flag and
 *  intra_bdpcm_chroma_flag could be present in the coding unit syntax for
 *  intra coding units.
 * @mts_enabled_flag: specifies whether sps_explicit_mts_intra_enabled_flag
 *  and sps_explicit_mts_inter_enabled_flag are present in the SPS.
 * @explicit_mts_intra_enabled_flag: specifies whether mts_idx could be present
 *  in the intra coding unit syntax of the CLVS.
 * @explicit_mts_inter_enabled_flag: specifies whether mts_idx could be present
 *  in the inter coding unit syntax of the CLVS.
 * @lfnst_enabled_flag: specifies whether lfnst_idx could be present in intra
 *  coding unit syntax.
 * @joint_cbcr_enabled_flag: specifies whether the joint coding of chroma
 *  residuals is enabled for the CLVS.
 * @same_qp_table_for_chroma_flag: specifies whether only one chroma QP mapping
 *  table is signalled and this table applies to Cb and Cr residuals and
 *  additionally to joint Cb-Cr residuals.
 * @qp_table_start_minus26: specifies the starting luma and chroma QP used to
 *  describe the i-th chroma QP mapping table.
 * @num_points_in_qp_table_minus1: specifies the number of points used to
 *  describe the i-th chroma QP mapping table.
 * @delta_qp_in_val_minus1: specifies a delta value used to derive the input
 *  coordinate of the j-th pivot point of the i-th chroma QP mapping table.
 * @delta_qp_diff_val: specifies a delta value used to derive the output
 *  coordinate of the j-th pivot point of the i-th chroma QP mapping table.
 * @sao_enabled_flag: specifies whether SAO is enabled for the CLVS.
 * @alf_enabled_flag: specifies whether ALF is enabled for the CLVS.
 * @ccalf_enabled_flag: specifies whether CCALF is enabled for the CLVS.
 * @lmcs_enabled_flag: specifies whether LMCS is enabled for the CLVS.
 * @weighted_pred_flag: specifies whether weighted prediction might be applied
 *  to P slices referring to the SPS.
 * @weighted_bipred_flag: specifies whether explicit weighted prediction might
 *  be applied to B slices referring to the SPS.
 * @guint8 long_term_ref_pics_flag: specifies whether no LTRP is used for inter
 *  prediction of any coded picture in the CLVS.
 * @inter_layer_prediction_enabled_flag: specifies whether inter-layer prediction
 *  is enabled for the CLVS and ILRPs might be used for inter prediction of one
 *  or more coded pictures in the CLVS.
 * @idr_rpl_present_flag: specifies whether RPL syntax elements could be present
 *  in slice headers of slices with nal_unit_type equal to IDR_N_LP or IDR_W_RADL.
 * @rpl1_same_as_rpl0_flag: specifies whether the syntax element
 *  sps_num_ref_pic_lists[1] and the syntax structure ref_pic_list_struct(1,
    rplsIdx) are present.
 * @num_ref_pic_lists: specifies the number of the ref_pic_list_struct(listIdx,
 *  rplsIdx) syntax structures with listIdx equal to i included in the SPS.
 * @ref_pic_list_struct: the reference list of #GstH266RefPicListStruct.
 * @ref_wraparound_enabled_flag: specifies whether horizontal wrap-around motion
 *  compensation is enabled for the CLVS.
 * @temporal_mvp_enabled_flag: specifies whether temporal motion vector
 *  predictors are enabled for the CLVS.
 * @sbtmvp_enabled_flag: specifies whether subblock-based temporal motion vector
 *  predictors are enabled and might be used in decoding of pictures with all
 *  slices having sh_slice_type not equal to I in the CLVS.
 * @amvr_enabled_flag: specifies whether adaptive motion vector difference
 *  resolution is enabled for the CVLS.
 * @bdof_enabled_flag: specifies whether the bi-directional optical flow inter
 *  prediction is enabled for the CLVS.
 * @bdof_control_present_in_ph_flag: specifies whether ph_bdof_disabled_flag
 *  could be present in PH syntax structures referring to the SPS.
 * @smvd_enabled_flag: specifies whether symmetric motion vector difference
 *  is enabled for the CLVS.
 * @dmvr_enabled_flag: specifies whether decoder motion vector refinement based
 *  inter bi-prediction is enabled for the CLVS.
 * @dmvr_control_present_in_ph_flag: specifies whether ph_dmvr_disabled_flag
 *  could be present in PH syntax structures referring to the SPS.
 * @mmvd_enabled_flag: specifies whether merge mode with motion vector
 *  difference is enabled for the CLVS.
 * @mmvd_fullpel_only_enabled_flag: specifies whether the merge mode with motion
 *  vector difference using only integer sample precision is enabled for the CLVS.
 * @six_minus_max_num_merge_cand: specifies the maximum number of merging motion
 *  vector prediction (MVP) candidates supported in the SPS.
 * @sbt_enabled_flag: specifies whether subblock transform for inter-predicted
 *  CUs is enabled for the CLVS.
 * @affine_enabled_flag: specifies whether the affine model based motion
 *  compensation is enabled for the CLVS.
 * @five_minus_max_num_subblock_merge_cand: specifies the maximum number of
 *  subblock-based merging motion vector prediction candidates supported.
 * @sps_6param_affine_enabled_flag: specifies whether the 6-parameter affine
 *  model based motion compensation is enabled for the CLVS.
 * @affine_amvr_enabled_flag: specifies whether adaptive motion vector
 *  difference resolution is enabled for the CLVS.
 * @affine_prof_enabled_flag: specifies whether the affine motion compensation
 *  refined with optical flow is enabled for the CLVS.
 * @prof_control_present_in_ph_flag: specifies whether ph_prof_disabled_flag
 *  could be present in PH syntax structures.
 * bcw_enabled_flag: specifies whether bi-prediction with CU weights is enabled
 *  for the CLVS.
 * @ciip_enabled_flag: specifies whether ciip_flag could be present in the
 *  coding unit syntax for inter coding units.
 * @gpm_enabled_flag: specifies whether the geometric partition based motion
 *  compensation is enabled for the CLVS.
 * @max_num_merge_cand_minus_max_num_gpm_cand: specifies the maximum number of
 *  geometric partitioning merge mode candidates supported in the SPS.
 * @log2_parallel_merge_level_minus2: specifies the value of the variable
 *  Log2ParMrgLevel.
 * @isp_enabled_flag: specifies whether intra prediction with subpartitions is
 *  enabled for the CLVS.
 * @mrl_enabled_flag: specifies whether intra prediction with multiple reference
 *  lines is enabled for the CLVS.
 * @mip_enabled_flag: specifies whether the matrix-based intra prediction is
 *  enabled for the CLVS.
 * @cclm_enabled_flag: specifies whether the cross-component linear model intra
 *  prediction from luma component to chroma component is enabled for the CLVS.
 * @chroma_horizontal_collocated_flag: specifies whether prediction processes
 *  operate in a manner designed for chroma sample positions that are not
 *  horizontally shifted relative to corresponding luma sample positions.
 * @chroma_vertical_collocated_flag: specifies whether prediction processes
 *  operate in a manner designed for chroma sample positions that are not
 *  vertically shifted relative to corresponding luma sample positions.
 * @palette_enabled_flag: specifies whether the palette prediction mode is
 *  enabled for the CLVS.
 * @act_enabled_flag: specifies whether the adaptive colour transform is enabled
 *  for the CLVS.
 * @min_qp_prime_ts: specifies whether minimum allowed quantization parameter
 *  for transform skip mode.
 * @ibc_enabled_flag: specifies whether the IBC prediction mode is enabled for
 *  the CLVS.
 * @six_minus_max_num_ibc_merge_cand: specifies the maximum number of IBC
 *  merging block vector prediction (BVP) candidates.
 * @ladf_enabled_flag: specifies whether sps_num_ladf_intervals_minus2,
 *  sps_ladf_lowest_interval_qp_offset, sps_ladf_qp_offset[i], and
 *  sps_ladf_delta_threshold_minus1[i] are present in the SPS.
 * @num_ladf_intervals_minus2: specifies the number of
 *  sps_ladf_delta_threshold_minus1[i] and sps_ladf_qp_offset[i] syntax
 *  elements that are present in the SPS.
 * @ladf_lowest_interval_qp_offset: specifies the offset used to derive the
 *  variable qP.
 * @ladf_qp_offset: specifies the offset array used to derive the variable qP.
 * @ladf_delta_threshold_minus1: is used to compute the values of
 *  SpsLadfIntervalLowerBound[i].
 * @explicit_scaling_list_enabled_flag: specifies whether the use of an explicit
 *  scaling list is enabled for the CLVS.
 * @scaling_matrix_for_lfnst_disabled_flag: specifies whether scaling matrices
 *  are disabled for blocks coded with LFNST for the CLVS.
 * @scaling_matrix_for_alternative_colour_space_disabled_flag: specifies whether
 *  scaling matrices are disabled and not applied to blocks of a coding unit.
 * @scaling_matrix_designated_colour_space_flag: specifies whether the colour
 *  space of the scaling matrices is the colour space that does not use a colour
 *  space conversion for the decoded residuals.
 * @dep_quant_enabled_flag: specifies whether dependent quantization is enabled
 *  for the CLVS.
 * @sign_data_hiding_enabled_flag: specifies whether sign bit hiding is enabled
 *  for the CLVS.
 * @virtual_boundaries_enabled_flag: specifies whether disabling in-loop
 *  filtering across virtual boundaries is enabled for the CLVS.
 * @virtual_boundaries_present_flag: specifies whether information of virtual
 *  boundaries is signalled in the SPS.
 * @num_ver_virtual_boundaries: specifies the number of
 *  sps_virtual_boundary_pos_x_minus1[i] syntax elements.
 * @virtual_boundary_pos_x_minus1: specifies the location of the i-th vertical
 *  virtual boundary in units of luma samples divided by 8.
 * @num_hor_virtual_boundaries: specifies the number of
 *  sps_virtual_boundary_pos_y_minus1[i] syntax elements.
 * @virtual_boundary_pos_y_minus1: specifies the location of the i-th horizontal
 *  virtual boundary in units of luma samples divided by 8.
 * @timing_hrd_params_present_flag: specifies whether the SPS contains a
 *  general_timing_hrd_parameters syntax structure and an
 *  ols_timing_hrd_parameters syntax structure.
 * @sublayer_cpb_params_present_flag: specifies whether the
 *  ols_timing_hrd_parameters syntax structure in the SPS includes HRD
 *  parameters for sublayer representations.
 * @field_seq_flag: indicates whether the CLVS conveys pictures that
 *  represent fields.
 * @vui_parameters_present_flag: specifies whether the syntax structure
 *  vui_payload is present in the SPS RBSP syntax structure.
 * @vui_payload_size_minus1: specifies the number of RBSP bytes in the
 *  vui_payload syntax structure.
 * @vui_params: VUI parameters of #GstH266VUIParams.
 * @extension_flag: specifies whether the syntax elements
 *  sps_range_extension_flag and sps_extension_7bits are present.
 * @range_extension_flag: specifies whether the sps_range_extension syntax
 *  structure is present.
 * @extension_7_flags: specifies whether no sps_extension_data_flag syntax
 *  elements are present.
 * @range_params: range parameters of #GstH266SPSRangeExtensionParams.
 * @max_width: the calculated max width of the picture.
 * @max_height: the calculated max height of the picture.
 * @crop_rect_width: the cropped width of the picture.
 * @crop_rect_height: the cropped height of the picture.
 * @crop_rect_x: the x offset of the cropped window.
 * @crop_rect_y: the y offset of the cropped window.
 * @fps_num: the calculated FPS numerator.
 * @fps_den: the calculated FPS denominator.
 * @valid: whether the SPS is valid.
 *
 * Since: 1.26
 */
struct _GstH266SPS
{
  guint8 nuh_layer_id;
  guint8 sps_id;
  guint8 vps_id;

  GstH266VPS *vps;

  guint8 max_sublayers_minus1;
  guint8 chroma_format_idc;
  guint8 log2_ctu_size_minus5;
  guint ctu_size;

  guint8 ptl_dpb_hrd_params_present_flag;
  GstH266DPBParameters dpb;
  GstH266ProfileTierLevel profile_tier_level;
  GstH266GeneralHRDParameters general_hrd_params;
  GstH266OLSHRDParameters ols_hrd_params;

  guint8 gdr_enabled_flag;
  guint8 res_change_in_clvs_allowed_flag;
  guint8 ref_pic_resampling_enabled_flag;

  guint16 pic_width_max_in_luma_samples;
  guint16 pic_height_max_in_luma_samples;

  guint8 conformance_window_flag;
  guint16 conf_win_left_offset;
  guint16 conf_win_right_offset;
  guint16 conf_win_top_offset;
  guint16 conf_win_bottom_offset;

  guint8 subpic_info_present_flag;
  guint16 num_subpics_minus1;
  guint8 independent_subpics_flag;
  guint8 subpic_same_size_flag;
  guint16 subpic_ctu_top_left_x[GST_H266_MAX_SLICES_PER_AU];
  guint16 subpic_ctu_top_left_y[GST_H266_MAX_SLICES_PER_AU];
  guint16 subpic_width_minus1[GST_H266_MAX_SLICES_PER_AU];
  guint16 subpic_height_minus1[GST_H266_MAX_SLICES_PER_AU];
  guint8 subpic_treated_as_pic_flag[GST_H266_MAX_SLICES_PER_AU];
  guint8 loop_filter_across_subpic_enabled_flag[GST_H266_MAX_SLICES_PER_AU];
  guint32 subpic_id[GST_H266_MAX_SLICES_PER_AU];
  guint8 subpic_id_len_minus1;
  guint8 subpic_id_mapping_explicitly_signalled_flag;
  guint8 subpic_id_mapping_present_flag;

  guint8 bitdepth_minus8;
  guint8 entropy_coding_sync_enabled_flag;
  guint8 entry_point_offsets_present_flag;

  guint8 log2_max_pic_order_cnt_lsb_minus4;
  guint8 poc_msb_cycle_flag;
  guint8 poc_msb_cycle_len_minus1;

  guint8 num_extra_ph_bytes;
  guint8 extra_ph_bit_present_flag[16];
  guint8 num_extra_sh_bytes;
  guint8 extra_sh_bit_present_flag[16];

  guint8 sublayer_dpb_params_flag;

  guint8 log2_min_luma_coding_block_size_minus2;
  guint8 partition_constraints_override_enabled_flag;
  guint8 log2_diff_min_qt_min_cb_intra_slice_luma;
  guint8 max_mtt_hierarchy_depth_intra_slice_luma;
  guint8 log2_diff_max_bt_min_qt_intra_slice_luma;
  guint8 log2_diff_max_tt_min_qt_intra_slice_luma;

  guint8 qtbtt_dual_tree_intra_flag;
  guint8 log2_diff_min_qt_min_cb_intra_slice_chroma;
  guint8 max_mtt_hierarchy_depth_intra_slice_chroma;
  guint8 log2_diff_max_bt_min_qt_intra_slice_chroma;
  guint8 log2_diff_max_tt_min_qt_intra_slice_chroma;

  guint8 log2_diff_min_qt_min_cb_inter_slice;
  guint8 max_mtt_hierarchy_depth_inter_slice;
  guint8 log2_diff_max_bt_min_qt_inter_slice;
  guint8 log2_diff_max_tt_min_qt_inter_slice;

  guint8 max_luma_transform_size_64_flag;

  guint8 transform_skip_enabled_flag;
  guint8 log2_transform_skip_max_size_minus2;
  guint8 bdpcm_enabled_flag;

  guint8 mts_enabled_flag;
  guint8 explicit_mts_intra_enabled_flag;
  guint8 explicit_mts_inter_enabled_flag;

  guint8 lfnst_enabled_flag;

  guint8 joint_cbcr_enabled_flag;
  guint8 same_qp_table_for_chroma_flag;

  gint8 qp_table_start_minus26[GST_H266_MAX_SAMPLE_ARRAYS];
  guint8 num_points_in_qp_table_minus1[GST_H266_MAX_SAMPLE_ARRAYS];
  guint8 delta_qp_in_val_minus1[GST_H266_MAX_SAMPLE_ARRAYS][GST_H266_MAX_POINTS_IN_QP_TABLE];
  guint8 delta_qp_diff_val[GST_H266_MAX_SAMPLE_ARRAYS][GST_H266_MAX_POINTS_IN_QP_TABLE];

  guint8 sao_enabled_flag;
  guint8 alf_enabled_flag;
  guint8 ccalf_enabled_flag;
  guint8 lmcs_enabled_flag;
  guint8 weighted_pred_flag;
  guint8 weighted_bipred_flag;

  guint8 long_term_ref_pics_flag;
  guint8 inter_layer_prediction_enabled_flag;
  guint8 idr_rpl_present_flag;
  guint8 rpl1_same_as_rpl0_flag;
  guint8 num_ref_pic_lists[2];
  GstH266RefPicListStruct ref_pic_list_struct[2][GST_H266_MAX_REF_PIC_LISTS];

  guint8 ref_wraparound_enabled_flag;
  guint8 temporal_mvp_enabled_flag;
  guint8 sbtmvp_enabled_flag;
  guint8 amvr_enabled_flag;
  guint8 bdof_enabled_flag;
  guint8 bdof_control_present_in_ph_flag;
  guint8 smvd_enabled_flag;
  guint8 dmvr_enabled_flag;
  guint8 dmvr_control_present_in_ph_flag;
  guint8 mmvd_enabled_flag;
  guint8 mmvd_fullpel_only_enabled_flag;
  guint8 six_minus_max_num_merge_cand;
  guint8 sbt_enabled_flag;
  guint8 affine_enabled_flag;
  guint8 five_minus_max_num_subblock_merge_cand;
  guint8 sps_6param_affine_enabled_flag;
  guint8 affine_amvr_enabled_flag;
  guint8 affine_prof_enabled_flag;
  guint8 prof_control_present_in_ph_flag;
  guint8 bcw_enabled_flag;
  guint8 ciip_enabled_flag;
  guint8 gpm_enabled_flag;
  guint8 max_num_merge_cand_minus_max_num_gpm_cand;
  guint8 log2_parallel_merge_level_minus2;
  guint8 isp_enabled_flag;
  guint8 mrl_enabled_flag;
  guint8 mip_enabled_flag;
  guint8 cclm_enabled_flag;
  guint8 chroma_horizontal_collocated_flag;
  guint8 chroma_vertical_collocated_flag;
  guint8 palette_enabled_flag;
  guint8 act_enabled_flag;
  guint8 min_qp_prime_ts;
  guint8 ibc_enabled_flag;
  guint8 six_minus_max_num_ibc_merge_cand;
  guint8 ladf_enabled_flag;
  guint8 num_ladf_intervals_minus2;
  gint8 ladf_lowest_interval_qp_offset;
  gint8 ladf_qp_offset[4];
  guint16 ladf_delta_threshold_minus1[4];

  guint8 explicit_scaling_list_enabled_flag;
  guint8 scaling_matrix_for_lfnst_disabled_flag;
  guint8 scaling_matrix_for_alternative_colour_space_disabled_flag;
  guint8 scaling_matrix_designated_colour_space_flag;
  guint8 dep_quant_enabled_flag;
  guint8 sign_data_hiding_enabled_flag;

  guint8 virtual_boundaries_enabled_flag;
  guint8 virtual_boundaries_present_flag;
  guint32 num_ver_virtual_boundaries;
  guint16 virtual_boundary_pos_x_minus1[3];
  guint32 num_hor_virtual_boundaries;
  guint16 virtual_boundary_pos_y_minus1[3];

  guint8 timing_hrd_params_present_flag;
  guint8 sublayer_cpb_params_present_flag;

  guint8 field_seq_flag;
  guint8 vui_parameters_present_flag;
  guint16 vui_payload_size_minus1;
  GstH266VUIParams vui_params;

  guint8 extension_flag;
  guint8 range_extension_flag;
  guint8 extension_7_flags[7];
  GstH266SPSRangeExtensionParams range_params;

  /* calculated values */
  gint max_width, max_height;
  gint crop_rect_width, crop_rect_height;
  gint crop_rect_x, crop_rect_y;
  gint fps_num, fps_den;
  gint chroma_qp_table[GST_H266_MAX_SAMPLE_ARRAYS][GST_H266_MAX_POINTS_IN_QP_TABLE];
  gboolean valid;
};

/**
 * GstH266PPS:
 *
 * Structure defining the H266 PPS.
 *
 * @pps_id: provides an identifier for the PPS for reference by other
 *  syntax elements.
 * @sps_id: specifies the SPS referred to by this PPS.
 * @sps: the #GstH266SPS this PPS refers to.
 * @mixed_nalu_types_in_pic_flag: specifies whether each picture referring to
 *  the PPS has more than one VCL NAL unit and the VCL NAL units do not have
 *  the same value of nal_unit_type.
 * @pic_width_in_luma_samples: specifies the width of each decoded picture
 *  referring to the PPS in units of luma samples.
 * @pic_height_in_luma_samples: specifies the height of each decoded picture
 *  referring to the PPS in units of luma samples.
 * @conformance_window_flag: specifies whether the conformance cropping window
 *  offset parameters follow next in the PPS.
 * @conf_win_left_offset: specify left offset of the cropping window that
 *  is applied to pictures.
 * @conf_win_right_offset: specify right offset of the cropping window that
 *  is applied to pictures.
 * @conf_win_top_offset: specify top offset of the cropping window that
 *  is applied to pictures.
 * @conf_win_bottom_offset: specify bottom offset of the cropping window that
 *  is applied to pictures.
 * @scaling_window_explicit_signalling_flag: specifies whether the scaling
 *  window offset parameters are present in the PPS.
 * @scaling_win_left_offset: specify the left offsets that are applied to the
 *  picture size for scaling ratio calculation.
 * @scaling_win_right_offset: specify the right offsets that are applied to the
 *  picture size for scaling ratio calculation.
 * @scaling_win_top_offset: specify the top offsets that are applied to the
 *  picture size for scaling ratio calculation.
 * @scaling_win_bottom_offset: specify the bottom offsets that are applied to
 *  the picture size for scaling ratio calculation.
 * @output_flag_present_flag: specifies whether the ph_pic_output_flag syntax
 *  element could be present in PH syntax structures referring to the PPS.
 * @no_pic_partition_flag: specifies whether no picture partitioning is applied
 *  to each picture referring to the PPS.
 * @subpic_id_mapping_present_flag: specifies whether the subpicture ID mapping
 *  is signalled in the PPS.
 * @num_subpics_minus1: shall be equal to sps_num_subpics_minus1.
 * @subpic_id_len_minus1: shall be equal to sps_subpic_id_len_minus1.
 * @subpic_id: specifies the subpicture ID of the i-th subpicture.
 * @log2_ctu_size_minus5: specifies the luma coding tree block size of each CTU.
 * @num_exp_tile_columns_minus1: specifies the number of explicitly provided
 *  tile column widths.
 * @num_exp_tile_rows_minus1: specifies the number of explicitly provided tile
 *  row heights.
 * @tile_column_width_minus1: specifies the width of the i-th tile column in
 *  units of CTBs.
 * @tile_row_height_minus1: specifies the height of the i-th tile row in units
 *  of CTBs.
 * @loop_filter_across_tiles_enabled_flag: specifies whether in-loop filtering
 *  operations across tile boundaries are enabled for pictures.
 * @rect_slice_flag: specifies whether the raster-san slice mode is in use for
 *  each picture referring to the PPS.
 * @single_slice_per_subpic_flag: specifies whether each subpicture consists of
 *  one and only one rectangular slice.
 * @num_slices_in_pic_minus1: specifies the number of rectangular slices in
 *  each picture.
 * @tile_idx_delta_present_flag: specifies whether all pictures are partitioned
 *  into rectangular slice rows and rectangular slice columns in slice raster
 *  order.
 * @slice_width_in_tiles_minus1: specifies the width of the i-th rectangular
 *  slice in units of tile columns.
 * @slice_height_in_tiles_minus1: specifies the height of the i-th rectangular
 *  slice in units of tile rows.
 * @num_exp_slices_in_tile: specifies the number of explicitly provided slice
 *  heights for the slices in the containing the i-th slice.
 * @exp_slice_height_in_ctus_minus1: specifies the height of the j-th rectangular
 *  slice in the tile containing the i-th slice.
 * @tile_idx_delta_val: specifies the difference between the tile index of the
 *  tile containing the first CTU in the (i+1)-th rectangular slice and the tile
 *  index of the tile containing the first CTU in the i-th rectangular slice.
 * @loop_filter_across_slices_enabled_flag: specifies whether in-loop filtering
 *  operations across slice boundaries are enabled.
 * @cabac_init_present_flag: specifies whether sh_cabac_init_flag is present
 *  in slice headers.
 * @num_ref_idx_default_active_minus1: specifies the inferred value of the
 *  variable NumRefIdxActive[0] for P or B slices.
 * @rpl1_idx_present_flag: specifies whether rpl_sps_flag[1] and rpl_idx[1] are
 *  present in the PH.
 * @weighted_pred_flag: specifies whether weighted prediction is applied to P
 *  slices.
 * @weighted_bipred_flag: specifies whether explicit weighted prediction is
 *  applied to B slices.
 * @ref_wraparound_enabled_flag: specifies whether the horizontal wrap-around
 *  motion compensation is enabled.
 * @pic_width_minus_wraparound_offset: specifies the difference between the
 *  picture width and the offset used for computing the horizontal wrap-around
 *  position in units of MinCbSizeY luma samples.
 * @init_qp_minus26: specifies the initial value of SliceQp Y for each slice.
 * @cu_qp_delta_enabled_flag: specifies whether either or both of the
 *  ph_cu_qp_delta_subdiv_intra_slice and ph_cu_qp_delta_subdiv_inter_slice
 *  syntax elements are present in PH.
 * @chroma_tool_offsets_present_flag: specifies whether chroma tool offsets
 *  related syntax elements are present in the PPS.
 * @cb_qp_offset: specify the offsets to the luma quantization parameter Qp'Y
 *  used for deriving Qp'Cb.
 * @cr_qp_offset: specify the offsets to the luma quantization parameter Qp'Y
 *  used for deriving Qp'Cr.
 * @joint_cbcr_qp_offset_present_flag: specifies whether
 *  pps_joint_cbcr_qp_offset_value and pps_joint_cbcr_qp_offset_list[i] are
 *  present in the PPS.
 * @joint_cbcr_qp_offset_value: specifies the offset to the luma quantization
 *  parameter Qp'Y used for deriving Qp'CbCr.
 * @slice_chroma_qp_offsets_present_flag: specifies whether the sh_cb_qp_offset
 *  and sh_cr_qp_offset syntax elements are present in slice headers.
 * @cu_chroma_qp_offset_list_enabled_flag: specifies whether the
 *  ph_cu_chroma_qp_offset_subdiv_intra_slice and
 *  ph_cu_chroma_qp_offset_subdiv_inter_slice syntax elements are present in PH.
 * @chroma_qp_offset_list_len_minus1: specifies whether number of
 *  pps_cb_qp_offset_list[i], pps_cr_qp_offset_list[i],
 *  and pps_joint_cbcr_qp_offset_list[i], syntax elements that are present.
 * @cb_qp_offset_list: specify offsets used in the derivation of Qp'Cb.
 * @cr_qp_offset_list: specify offsets used in the derivation of Qp'Cr.
 * @joint_cbcr_qp_offset_list: specify offsets used in the derivation of Qp'CbCr.
 * @deblocking_filter_control_present_flag: specifies whether presence of
 *  deblocking filter control syntax elements in the PPS.
 * @deblocking_filter_override_enabled_flag: specifies whether the deblocking
 *  behaviour could be overridden in the picture level or slice level.
 * @deblocking_filter_disabled_flag: specifies whether the deblocking filter is
 *  disabled unless overridden for a picture or slice by information.
 * @dbf_info_in_ph_flag: specifies whether deblocking filter information is
 *  present in the PH syntax structure and not present in slice headers.
 * @luma_beta_offset_div2: specify the default deblocking parameter offsets
 *  for beta that are applied to the luma component.
 * @luma_tc_offset_div2: specify the default deblocking parameter offsets for
 *  tC (divided by 2) that are applied to the luma component.
 * @cb_beta_offset_div2: specify the default deblocking parameter offsets for
 *  beta and that are applied to the Cb component.
 * @cb_tc_offset_div2: specify the default deblocking parameter offsets for tC
    (divided by 2) that are applied to the Cb component.
 * @cr_beta_offset_div2: specify the default deblocking parameter offsets for
 *  beta that are applied to the Cr component.
 * @cr_tc_offset_div2: specify the default deblocking parameter offsets for tC
 *  (divided by 2) that are applied to the Cr component.
 * @rpl_info_in_ph_flag: specifies whether RPL information is present in the
 *  PH syntax structure and not present in slice headers.
 * @sao_info_in_ph_flag: specifies whether SAO filter information could be
 *  present in the PH syntax structure and not present in slice headers.
 * @alf_info_in_ph_flag: specifies whether ALF information could be present in
 *  the PH syntax structure and not present in slice headers.
 * @wp_info_in_ph_flag: specifies whether weighted prediction information could
 *  be present in the PH syntax structure and not present in slice headers.
 * @qp_delta_info_in_ph_flag: specifies whether QP delta information is present
 *  in the PH syntax structure and not present in slice headers.
 * @picture_header_extension_present_flag: specifies whether PH extension syntax
 *  elements are present in PH syntax structures.
 * @slice_header_extension_present_flag: specifies whether slice header
 *  extension syntax elements are present in the slice headers.
 * @extension_flag: specifies whether pps_extension_data_flag syntax elements
 *  are present.
 * @extension_data_flag: could have any value.
 * @width: the calculated width of the picture.
 * @height: the calculated height of the picture.
 * @crop_rect_width: the cropped width of the picture.
 * @crop_rect_height: the cropped height of the picture.
 * @crop_rect_x: the x offset of the cropped window.
 * @crop_rect_y: the y offset of the cropped window.
 * @pic_width_in_ctbs_y: PicWidthInCtbsY specify picture width count in CTBs.
 * @pic_height_in_ctbs_y: PicHeightInCtbsY specify picture height count in CTBs.
 * @pic_size_in_ctbs_y: picture size count in CTBs.
 * @num_tile_columns: total tile number in columns.
 * @num_tile_rows: total tile number in rows.
 * @num_tiles_in_pic: total tile number of the picture.
 * @tile_col_bd_val: TileColBdVal specifying the location of the i-th tile
 *  column boundary in units of CTBs
 * @tile_row_bd_val: TileRowBdVal specifying the location of the j-th tile row
 *  boundary in units of CTBs.
 * @slice_top_left_tile_idx: SliceTopLeftTileIdx specifying the tile index of
 *  the tile containing the first CTU in the slice.
 * @slice_top_left_ctu_x: specifying the top left CTU index in X direction.
 * @slice_top_left_ctu_y: specifying the top left CTU index in Y direction.
 * @slice_height_in_ctus: slice height count in CTUs.
 * @num_slices_in_subpic: slice number in subpicture.
 * @valid: whether this PPS is valid.
 *
 * Since: 1.26
 */
struct _GstH266PPS
{
  guint8 pps_id;
  guint8 sps_id;

  GstH266SPS *sps;

  guint8 mixed_nalu_types_in_pic_flag;
  guint16 pic_width_in_luma_samples;
  guint16 pic_height_in_luma_samples;

  guint8 conformance_window_flag;
  guint16 conf_win_left_offset;
  guint16 conf_win_right_offset;
  guint16 conf_win_top_offset;
  guint16 conf_win_bottom_offset;

  guint8 scaling_window_explicit_signalling_flag;
  gint32 scaling_win_left_offset;
  gint32 scaling_win_right_offset;
  gint32 scaling_win_top_offset;
  gint32 scaling_win_bottom_offset;

  guint8 output_flag_present_flag;
  guint8 no_pic_partition_flag;

  guint8 subpic_id_mapping_present_flag;
  guint32 num_subpics_minus1;
  guint32 subpic_id_len_minus1;
  guint16 subpic_id[GST_H266_MAX_SLICES_PER_AU];

  guint8 log2_ctu_size_minus5;
  guint8 num_exp_tile_columns_minus1;
  guint8 num_exp_tile_rows_minus1;
  guint16 tile_column_width_minus1[GST_H266_MAX_TILE_COLUMNS];
  guint16 tile_row_height_minus1[GST_H266_MAX_TILE_ROWS];

  guint8 loop_filter_across_tiles_enabled_flag;
  guint8 rect_slice_flag;
  guint8 single_slice_per_subpic_flag;

  guint16 num_slices_in_pic_minus1;
  guint8 tile_idx_delta_present_flag;
  guint16 slice_width_in_tiles_minus1[GST_H266_MAX_SLICES_PER_AU];
  guint16 slice_height_in_tiles_minus1[GST_H266_MAX_SLICES_PER_AU];
  guint16 num_exp_slices_in_tile[GST_H266_MAX_SLICES_PER_AU];
  guint16 exp_slice_height_in_ctus_minus1[GST_H266_MAX_SLICES_PER_AU][GST_H266_MAX_TILE_ROWS];
  gint16 tile_idx_delta_val[GST_H266_MAX_SLICES_PER_AU];

  guint8 loop_filter_across_slices_enabled_flag;
  guint8 cabac_init_present_flag;
  guint8 num_ref_idx_default_active_minus1[2];
  guint8 rpl1_idx_present_flag;
  guint8 weighted_pred_flag;
  guint8 weighted_bipred_flag;
  guint8 ref_wraparound_enabled_flag;
  guint16 pic_width_minus_wraparound_offset;
  gint8 init_qp_minus26;
  guint8 cu_qp_delta_enabled_flag;
  guint8 chroma_tool_offsets_present_flag;
  gint8 cb_qp_offset;
  gint8 cr_qp_offset;
  guint8 joint_cbcr_qp_offset_present_flag;
  gint8 joint_cbcr_qp_offset_value;
  guint8 slice_chroma_qp_offsets_present_flag;
  guint8 cu_chroma_qp_offset_list_enabled_flag;
  guint8 chroma_qp_offset_list_len_minus1;
  guint8 cb_qp_offset_list[6];
  guint8 cr_qp_offset_list[6];
  guint8 joint_cbcr_qp_offset_list[6];
  guint8 deblocking_filter_control_present_flag;
  guint8 deblocking_filter_override_enabled_flag;
  guint8 deblocking_filter_disabled_flag;
  guint8 dbf_info_in_ph_flag;

  gint8 luma_beta_offset_div2;
  gint8 luma_tc_offset_div2;
  gint8 cb_beta_offset_div2;
  gint8 cb_tc_offset_div2;
  gint8 cr_beta_offset_div2;
  gint8 cr_tc_offset_div2;

  guint8 rpl_info_in_ph_flag;
  guint8 sao_info_in_ph_flag;
  guint8 alf_info_in_ph_flag;
  guint8 wp_info_in_ph_flag;
  guint8 qp_delta_info_in_ph_flag;

  guint8 picture_header_extension_present_flag;
  guint8 slice_header_extension_present_flag;
  guint8 extension_flag;
  guint8 extension_data_flag;

  /* extension_data */

  /* calculated value */
  gint width, height;
  gint crop_rect_width, crop_rect_height;
  gint crop_rect_x, crop_rect_y;
  guint32 pic_width_in_ctbs_y, pic_height_in_ctbs_y;
  guint32 pic_size_in_ctbs_y;
  guint32 num_tile_columns;
  guint32 num_tile_rows;
  guint32 num_tiles_in_pic;
  guint32 tile_col_bd_val[GST_H266_MAX_TILE_COLUMNS + 1];
  guint32 tile_row_bd_val[GST_H266_MAX_TILE_ROWS + 1];
  guint32 slice_top_left_tile_idx[GST_H266_MAX_SLICES_PER_AU];
  guint32 slice_top_left_ctu_x[GST_H266_MAX_SLICES_PER_AU];
  guint32 slice_top_left_ctu_y[GST_H266_MAX_SLICES_PER_AU];
  guint32 slice_height_in_ctus[GST_H266_MAX_SLICES_PER_AU];
  guint32 num_slices_in_subpic[GST_H266_MAX_SLICES_PER_AU];

  gboolean valid;
};

/**
 * GstH266ALF:
 *
 * Structure defining the H266 ALF parameters.
 *
 * @luma_filter_signal_flag: specifies whether a luma filter set is signalled.
 * @chroma_filter_signal_flag: specifies whether a chroma filter is signalled.
 * @cc_cb_filter_signal_flag: specifies whether cross-component filters for the
 *  Cb colour component are signalled.
 * @cc_cr_filter_signal_flag: specifies whether cross-component filters for the
 *  Cr colour component are signalled.
 * @luma_clip_flag: specifies whether linear adaptive loop filtering is applied
 *  to the luma component.
 * @luma_num_filters_signalled_minus1: specifies the number of adpative loop
 *  filter classes for which luma coefficients can be signalled.
 * @luma_coeff_delta_idx: specifies the indices of the signalled adaptive loop
 *  filter luma coefficient deltas for the filter class.
 * @luma_coeff_abs: specifies the absolute value of the j-th coefficient of
 *  the signalled luma filter.
 * @luma_coeff_sign: specifies the sign of the j-th luma coefficient of the
 *  filter.
 * @luma_clip_idx: specifies the clipping index of the clipping value to use
 *  before multiplying by the j-th coefficient of the signalled luma filter.
 * @chroma_clip_flag: specifies whether linear adaptive loop filtering is
 *  applied to chroma components.
 * @chroma_num_alt_filters_minus1: specifies the number of alternative filters
 *  for chroma components.
 * @chroma_coeff_abs: specifies the absolute value of the j-th chroma filter
 *  coefficient for the alternative chroma filter with index altIdx.
 * @chroma_coeff_sign: specifies the sign of the j-th chroma filter coefficient
 *  for the alternative chroma filter with index altIdx.
 * @chroma_clip_idx: specifies the clipping index of the clipping value to use
 *  before multiplying by the j-th coefficient of the alternative chroma filter
 *  with index altIdx.
 * @cc_cb_filters_signalled_minus1: specifies the number of cross-component
 *  filters for the Cb colour component.
 * @cc_cb_mapped_coeff_abs: specifies the absolute value of the j-th mapped
 *  coefficient of the signalled k-th cross-component filter for the Cb colour
 *  component.
 * @cc_cb_coeff_sign: specifies the sign of the j-th coefficient of the
 *  signalled k-th cross-component filter for the Cb colour component.
 * @cc_cr_filters_signalled_minus1: specifies the number of cross-component
 *  filters for the Cr colour component.
 * @cc_cr_mapped_coeff_abs: specifies the absolute value of the j-th mapped
 *  coefficient of the signalled k-th cross-component filter for the Cr colour
 *  component.
 * @cc_cr_coeff_sign: specifies the sign of the j-th coefficient of the
 *  signalled k-th cross-component filter for the Cr colour component.
 *
 * Since: 1.26
 */
struct _GstH266ALF
{
  guint8 luma_filter_signal_flag;
  guint8 chroma_filter_signal_flag;
  guint8 cc_cb_filter_signal_flag;
  guint8 cc_cr_filter_signal_flag;
  guint8 luma_clip_flag;
  guint8 luma_num_filters_signalled_minus1;
  guint8 luma_coeff_delta_idx[GST_H266_NUM_ALF_FILTERS];
  guint8 luma_coeff_abs[GST_H266_NUM_ALF_FILTERS][12];
  guint8 luma_coeff_sign[GST_H266_NUM_ALF_FILTERS][12];
  guint8 luma_clip_idx[GST_H266_NUM_ALF_FILTERS][12];
  guint8 chroma_clip_flag;
  guint8 chroma_num_alt_filters_minus1;
  guint8 chroma_coeff_abs[8][6];
  guint8 chroma_coeff_sign[8][6];
  guint8 chroma_clip_idx[8][6];
  guint8 cc_cb_filters_signalled_minus1;
  guint8 cc_cb_mapped_coeff_abs[4][7];
  guint8 cc_cb_coeff_sign[4][7];
  guint8 cc_cr_filters_signalled_minus1;
  guint8 cc_cr_mapped_coeff_abs[4][7];
  guint8 cc_cr_coeff_sign[4][7];
};

/**
 * GstH266LMCS:
 *
 * Structure defining the H266 LMCS parameters.
 *
 * @min_bin_idx: minimum bin index used in the luma mapping with chroma scaling
 *  construction process.
 * @delta_max_bin_idx: specifies the delta value between 15 and the maximum bin
 *  index LmcsMaxBinIdx used in the luma mapping with chroma scaling construction
 *  process.
 * @delta_cw_prec_minus1: specifies the number of bits used for the
 *  representation of the syntax lmcs_delta_abs_cw[i].
 * @delta_abs_cw: specifies the absolute delta codeword value for the ith bin.
 * @delta_sign_cw_flag: specifies the sign of the variable lmcsDeltaCW[i].
 * @delta_abs_crs: specifies the absolute codeword value of the variable
 *  lmcsDeltaCrs.
 * @delta_sign_crs_flag: specifies the sign of the variable lmcsDeltaCrs.
 *
 * Since: 1.26
 */
struct _GstH266LMCS
{
  guint8 min_bin_idx;
  guint8 delta_max_bin_idx;
  guint8 delta_cw_prec_minus1;
  guint8 delta_abs_cw[16];
  guint8 delta_sign_cw_flag[16];
  guint8 delta_abs_crs;
  guint8 delta_sign_crs_flag;
};

/**
 * GstH266ScalingList:
 *
 * Structure defining the H266 scaling list parameters.
 *
 * @copy_mode_flag: specifies whether the values of the scaling list are the
 *  same as the values of a reference scaling list.
 * @pred_mode_flag: specifies whether the values of the scaling list can be
 *  predicted from a reference scaling list.
 * @pred_id_delta: specifies the reference scaling list used to derive the
 *  predicted scaling matrix scalingMatrixPred.
 * @dc_coef: used to derive the value of the variable ScalingMatrixDcRec.
 * @delta_coef: specifies the difference between the current matrix coefficient
 *  ScalingList.
 * @scaling_list_DC: the scaling list DC coef.
 * @scaling_list: the calculated scaling list coefs.
 *
 * Since: 1.26
 */
struct _GstH266ScalingList
{
  guint8 copy_mode_flag[28];
  guint8 pred_mode_flag[28];
  guint8 pred_id_delta[28];
  gint8 dc_coef[14];
  gint8 delta_coef[28][64];
  guint8 scaling_list_DC[14];
  guint8 scaling_list[28][64];
};

/**
 * GstH266APS:
 *
 * Structure defining the H266 Adaptation Parameter Set.
 *
 * @params_type: specifies the type of APS parameters carried in the APS as
 *  specified in Table 6.
 * @aps_id: provides an identifier for the APS for reference by other syntax
 *  elements.
 * @chroma_present_flag: specifies whether the APS NAL unit could include
 *  chroma related syntax elements.
 * @alf: ALF parameters of #GstH266ALF when params_type is GST_H266_ALF_APS.
 * @lmcs: LMCS parameters of #GstH266LMCS when params_type is GST_H266_LMCS_APS.
 * @sl: scaling list parameters of #GstH266ScalingList when params_type is
 *  GST_H266_SCALING_APS.
 * @extension_flag: specifies whether aps_extension_data_flag syntax elements
 *  are present.
 * @extension_data_flag: could have any value and do not affect the decoding
 *  process now.
 * @valid: whether this APS is valid.
 *
 * Since: 1.26
 */
struct _GstH266APS
{
  GstH266APSType params_type;
  guint8 aps_id;
  guint8 chroma_present_flag;

  union {
    GstH266ALF alf;
    GstH266LMCS lmcs;
    GstH266ScalingList sl;
  };

  guint8 extension_flag;
  guint8 extension_data_flag;
  gboolean valid;
};

/**
 * GstH266PredWeightTable:
 *
 * Structure defining the H266 weight table parameters.
 *
 * @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.
 * @num_l0_weights: specifies the number of weights signalled for entries in
 *  RPL 0 when pps_wp_info_in_ph_flag is equal to 1.
 * @luma_weight_l0_flag: specifies whether weighting factors for the luma
 *  component of list 0 prediction using RefPicList[0][i] are present.
 * @chroma_weight_l0_flag: specifies whether weighting factors for the chroma
 *  prediction values of list 0 prediction using RefPicList[0][i] are present.
 * @delta_luma_weight_l0: the difference of the weighting factor applied to the
 *  luma prediction value for list 0 prediction using RefPicList[0][i].
 * @luma_offset_l0: the additive offset applied to the luma prediction value
 *  for list 0 prediction using RefPicList[0][i].
 * @delta_chroma_weight_l0: the difference of the weighting factor applied to
 *  the chroma prediction values for list 0 prediction.
 * @delta_chroma_offset_l0: the difference of the additive offset applied to
 *  the chroma prediction values for list 0 prediction.
 * @num_l1_weights: specifies the number of weights signalled for entries in
 *  RPL 1.
 * @luma_weight_l1_flag: specifies whether weighting factors for the luma
 *  component of list 1 prediction using RefPicList[1][i] are present.
 * @chroma_weight_l1_flag: specifies whether weighting factors for the chroma
 *  prediction values of list 1 prediction using RefPicList[1][i] are present.
 * @delta_luma_weight_l1: the difference of the weighting factor applied to the
 *  luma prediction value for list 1 prediction using RefPicList[1][i].
 * @luma_offset_l1: the additive offset applied to the luma prediction value
 *  for list 1 prediction using RefPicList[1][i].
 * @delta_chroma_weight_l1: the difference of the weighting factor applied to
 *  the chroma prediction values for list 1 prediction.
 * @delta_chroma_offset_l1: the difference of the additive offset applied to
 *  the chroma prediction values for list 1 prediction.
 *
 * Since: 1.26
 */
struct _GstH266PredWeightTable
{
  guint8 luma_log2_weight_denom;
  gint8 delta_chroma_log2_weight_denom;

  guint8 num_l0_weights;
  guint8 luma_weight_l0_flag[15];
  guint8 chroma_weight_l0_flag[15];
  gint8 delta_luma_weight_l0[15];
  gint8 luma_offset_l0[15];
  gint8 delta_chroma_weight_l0[15][2];
  gint16 delta_chroma_offset_l0[15][2];

  guint8 num_l1_weights;
  guint8 luma_weight_l1_flag[15];
  guint8 chroma_weight_l1_flag[15];
  gint8 delta_luma_weight_l1[15];
  gint8 luma_offset_l1[15];
  gint8 delta_chroma_weight_l1[15][2];
  gint16 delta_chroma_offset_l1[15][2];
};

/**
 * GstH266PicHdr:
 *
 * Structure defining the H266 picture header.
 *
 * @gdr_or_irap_pic_flag: specifies whethers the current picture is a GDR or
 *  IRAP picture.
 * @non_ref_pic_flag: specifies whether the current picture is never used as
 *  a reference picture.
 * @gdr_pic_flag: specifies whether the current picture is a GDR picture.
 * @inter_slice_allowed_flag: specifies whether all coded slices of the picture
 *  have sh_slice_type equal to 2.
 * @intra_slice_allowed_flag: specifies whether all coded slices of the picture
 *  have sh_slice_type equal to 0 or 1.
 * @pps_id: specifies the value of pps_pic_parameter_set_id for the PPS in use.
 * @pic_order_cnt_lsb: specifies the picture order count modulo
 *  MaxPicOrderCntLsb for the current picture.
 * @recovery_poc_cnt: specifies the recovery point of decoded pictures in
 *  output order.
 * @extra_bit[16]: could have any value.
 * @poc_msb_cycle_present_flag: specifies that the syntax element
 *  ph_poc_msb_cycle_val is present in the PH.
 * @poc_msb_cycle_val: specifies the value of the POC MSB cycle of the current
 *  picture.
 * @alf_enabled_flag: specifies whether the adaptive loop filter is enabled for
 *  the current picture.
 * @num_alf_aps_ids_luma: specifies the number of ALF APSs that the slices in
 *  the current picture refers to.
 * @alf_aps_id_luma: specifies the aps_adaptation_parameter_set_id of the i-th
 *  ALF APS.
 * @alf_cb_enabled_flag: specifies whether the adaptive loop filter is enabled
 *  for the Cb colour component of the current picture.
 * @alf_cr_enabled_flag: specifies whether the adaptive loop filter is enabled
 *  for the Cr colour component of the current picture.
 * @alf_aps_id_chroma;: specifies the aps_adaptation_parameter_set_id of the
 *  ALF APS.
 * @alf_cc_cb_enabled_flag: specifies whether the cross-component adaptive loop
 *  filter for the Cb colour component is enabled for the current picture
 * @alf_cc_cb_aps_id: specifies the aps_adaptation_parameter_set_id of the ALF APS
 *  that the Cb colour component of the slices in the current picture refers to.
 * @alf_cc_cr_enabled_flag: specifies that the cross-compoent adaptive loop
 *  filter for the Cr colour component is enabled for the current picture.
 * @alf_cc_cr_aps_id: specifies the aps_adaptation_parameter_set_id of the ALF APS
 *  that the Cr colour component of the slices in the current picture refers to.
 * @lmcs_enabled_flag: specifies whether LMCS is enabled for the current picture.
 * @lmcs_aps_id: specifies the aps_adaptation_parameter_set_id of the LMCS APS.
 * @chroma_residual_scale_flag: specifies whether chroma residual scaling is
 *  enabled and could be used for the current picture.
 * @explicit_scaling_list_enabled_flag: specifies that the explicit scaling list
 *  is enabled for the current picture.
 * @scaling_list_aps_id: specifies the aps_adaptation_parameter_set_id of the
 *  scaling list APS.
 * @virtual_boundaries_present_flag: specifies whether information of virtual
 *  boundaries is signalled in the PH syntax structure.
 * @num_ver_virtual_boundaries: specifies the number of
 *  ph_virtual_boundary_pos_x_minus1[i] syntax elements.
 * @virtual_boundary_pos_x_minus1: specifies the location of the i-th vertical
 *  virtual boundary in units of luma samples divided by 8.
 * @num_hor_virtual_boundaries: specifies the number of
 *  ph_virtual_boundary_pos_y_minus1[i].
 * @virtual_boundary_pos_y_minus1: specifies the location of the i-th horizontal
 *  virtual boundary in units of luma samples divided by 8.
 * @pic_output_flag: affects the decoded picture output and removal processes
 *  as specified in Annex C.
 * @ref_pic_lists: reference lists of #GstH266RefPicLists.
 * @partition_constraints_override_flag: specifies that partition constraint
 *  parameters are present.
 * @log2_diff_min_qt_min_cb_intra_slice_luma: specifies the difference between
 *  the base 2 logarithm of the minimum size in luma samples of a luma leaf
 *  block resulting from quadtree splitting of a CTU and the base 2 logarithm
 *  of the minimum coding block size in luma samples for luma CUs.
 * @max_mtt_hierarchy_depth_intra_slice_luma: specifies the maximum hierarchy
 *  depth for coding units resulting from multi-type tree splitting of a
 *  quadtree leaf.
 * @log2_diff_max_bt_min_qt_intra_slice_luma: specifies the difference between
 *  the base 2 logarithm of the maximum size in luma samples of a luma coding
 *  block that can be split using a binary split and the base 2 logarithm of
 *  the minimum size in luma samples of a luma leaf block resulting from
 *  quadtree splitting of a CTU.
 * @log2_diff_max_tt_min_qt_intra_slice_luma: specifies the difference between
 *  the base 2 logarithm of the maximum size in luma samples of a luma coding
 *  block that can be split using a ternary split and the base 2 logarithm of
 *  the minimum size in luma samples of a luma leaf block resulting from
 *  quadtree splitting of a CTU.
 * @log2_diff_min_qt_min_cb_intra_slice_chroma: specifies the difference between
 *  the base 2 logarithm of the minimum size in luma samples of a chroma leaf
 *  block resulting from quadtree splitting of a chroma CTU with treeType equal
 *  to DUAL_TREE_CHROMA and the base 2 logarithm of the minimum coding block
 *  size in luma samples for chroma CUs with treeType equal to DUAL_TREE_CHROMA.
 * @max_mtt_hierarchy_depth_intra_slice_chroma: specifies the maximum hierarchy
 *  depth for chroma coding units resulting from multi-type tree splitting of a
 *  chroma quadtree leaf with treeType equal to DUAL_TREE_CHROMA.
 * @log2_diff_max_bt_min_qt_intra_slice_chroma: specifies the difference between
 *  the base 2 logarithm of the maximum size in luma samples of a chroma coding
 *  block that can be split using a binary split and the base 2 logarithm of the
 *  minimum size in luma samples of a chroma leaf block resulting from quadtree
 *  splitting of a chroma CTU with treeType equal to DUAL_TREE_CHROMA.
 * @log2_diff_max_tt_min_qt_intra_slice_chroma: specifies the difference between
 *  the base 2 logarithm of the maximum size in luma samples of a chroma coding
 *  block that can be split using a ternary split and the base 2 logarithm of
 *  the minimum size in luma samples of a chroma leaf block resulting from
 *  quadtree splitting of a chroma CTU with treeType equal to DUAL_TREE_CHROMA.
 * @cu_qp_delta_subdiv_intra_slice: specifies the maximum cbSubdiv value of
 *  coding units in intra slice that convey cu_qp_delta_abs and
 *  cu_qp_delta_sign_flag.
 * @cu_chroma_qp_offset_subdiv_intra_slice: specifies the maximum cbSubdiv value
 *  of coding units in intra slice that convey cu_chroma_qp_offset_flag.
 * @log2_diff_min_qt_min_cb_inter_slice: specifies the difference between the
 *  base 2 logarithm of the minimum size in luma samples of a luma leaf block
 *  resulting from quadtree splitting of a CTU and the base 2 logarithm of the
 *  minimum luma coding block size in luma samples for luma CUs.
 * @max_mtt_hierarchy_depth_inter_slice: specifies the maximum hierarchy depth
 *  for coding units resulting from multi-type tree splitting of a quadtree leaf.
 * @log2_diff_max_bt_min_qt_inter_slice: specifies the difference between the
 *  base 2 logarithm of the maximum size in luma samples of a luma coding block
 *  that can be split using a binary split and the base 2 logarithm of the
 *  minimum size in luma samples of a luma leaf block resulting from quadtree
 *  splitting of a CTU.
 * @log2_diff_max_tt_min_qt_inter_slice: specifies the difference between the
 *  base 2 logarithm of the maximum size in luma samples of a luma coding block
 *  that can be split using a ternary split and the base 2 logarithm of the
 *  minimum size in luma samples of a luma leaf block resulting from quadtree
 *  splitting of a CTU.
 * @cu_qp_delta_subdiv_inter_slice: specifies the maximum cbSubdiv value of
 *  coding units that in inter slice convey cu_qp_delta_abs and
 *  cu_qp_delta_sign_flag.
 * @cu_chroma_qp_offset_subdiv_inter_slice: specifies the maximum cbSubdiv value
 *  of coding units in inter slice that convey cu_chroma_qp_offset_flag.
 * @temporal_mvp_enabled_flag: specifies whether temporal motion vector
 *  predictor is enabled for the current picture.
 * @collocated_from_l0_flag: specifies whether the collocated picture used for
 *  temporal motion vector prediction is derived from RPL 0.
 * @collocated_ref_idx: specifies the reference index of the collocated picture
 *  used for temporal motion vector prediction.
 * @mmvd_fullpel_only_flag: specifies whether the merge mode with motion vector
 *  difference uses only integer sample precision for the current picture.
 * @mvd_l1_zero_flag: specifies whether the mvd_coding syntax structure is parsed.
 * @bdof_disabled_flag: specifies that the bi-directional optical flow inter
 *  prediction based inter bi-prediction is disabled for the current picture.
 * @dmvr_disabled_flag: specifies whether the decoder motion vector refinement
 *  based inter bi-prediction is disabled for the current picture.
 * @prof_disabled_flag: specifies whether prediction refinement with optical
 *  flow is disabled for the current picture.
 * @pred_weight_table: prediction weight table of #GstH266PredWeightTable.
 * @qp_delta: specifies the initial value of QpY to be used for the coding
 *  blocks in the picture.
 * @joint_cbcr_sign_flag: specifies whether the collocated residual samples of
 *  both chroma components have inverted signs.
 * @sao_luma_enabled_flag: specifies whether SAO is enabled for the luma
 *  component of the current picture.
 * @sao_chroma_enabled_flag: specifies whether SAO is enabled for the chroma
 *  component of the current picture.
 * @deblocking_params_present_flag: specifies whether the deblocking parameters
 *  could be present in the PH syntax structure.
 * @deblocking_filter_disabled_flag: specifies whether the deblocking filter is
 *  disabled for the current picture.
 * @luma_beta_offset_div2: specify the deblocking parameter offsets for beta that
 *  are applied to the luma component for the slices in the current picture.
 * @luma_tc_offset_div2: specify the deblocking parameter offsets for tC that
 *  are applied to the luma component for the slices in the current picture.
 * @cb_beta_offset_div2: specify the deblocking parameter offsets for beta that
 *  are applied to the Cb component for the slices in the current picture.
 * @cb_tc_offset_div2: specify the deblocking parameter offsets for tC that
 *  are applied to the Cb component for the slices in the current picture.
 * @cr_beta_offset_div2: specify the deblocking parameter offsets for beta that
 *  are applied to the Cr component for the slices in the current picture.
 * @cr_tc_offset_div2: specify the deblocking parameter offsets for tC that
 *  are applied to the Cr component for the slices in the current picture.
 * @extension_length: specifies the length of the PH extension data in bytes.
 * @extension_data_byte: could have any value.
 * @valid: whether this picture header is valid.
 *
 * Since: 1.26
 */
struct _GstH266PicHdr {
  guint8 gdr_or_irap_pic_flag;
  guint8 non_ref_pic_flag;
  guint8 gdr_pic_flag;
  guint8 inter_slice_allowed_flag;
  guint8 intra_slice_allowed_flag;

  guint8 pps_id;
  GstH266PPS *pps;

  guint16 pic_order_cnt_lsb;
  guint8 recovery_poc_cnt;
  guint8 extra_bit[16];
  guint8 poc_msb_cycle_present_flag;
  guint8 poc_msb_cycle_val;

  guint8 alf_enabled_flag;
  guint8 num_alf_aps_ids_luma;
  guint8 alf_aps_id_luma[8];
  guint8 alf_cb_enabled_flag;
  guint8 alf_cr_enabled_flag;
  guint8 alf_aps_id_chroma;
  guint8 alf_cc_cb_enabled_flag;
  guint8 alf_cc_cb_aps_id;
  guint8 alf_cc_cr_enabled_flag;
  guint8 alf_cc_cr_aps_id;

  guint8 lmcs_enabled_flag;
  guint8 lmcs_aps_id;
  guint8 chroma_residual_scale_flag;
  guint8 explicit_scaling_list_enabled_flag;
  guint8 scaling_list_aps_id;

  guint8 virtual_boundaries_present_flag;
  guint8 num_ver_virtual_boundaries;
  guint16 virtual_boundary_pos_x_minus1[3];
  guint8 num_hor_virtual_boundaries;
  guint16 virtual_boundary_pos_y_minus1[3];

  guint8 pic_output_flag;
  GstH266RefPicLists ref_pic_lists;

  guint8 partition_constraints_override_flag;

  guint8 log2_diff_min_qt_min_cb_intra_slice_luma;
  guint8 max_mtt_hierarchy_depth_intra_slice_luma;
  guint8 log2_diff_max_bt_min_qt_intra_slice_luma;
  guint8 log2_diff_max_tt_min_qt_intra_slice_luma;
  guint8 log2_diff_min_qt_min_cb_intra_slice_chroma;

  guint8 max_mtt_hierarchy_depth_intra_slice_chroma;
  guint8 log2_diff_max_bt_min_qt_intra_slice_chroma;
  guint8 log2_diff_max_tt_min_qt_intra_slice_chroma;

  guint8 cu_qp_delta_subdiv_intra_slice;
  guint8 cu_chroma_qp_offset_subdiv_intra_slice;

  guint8 log2_diff_min_qt_min_cb_inter_slice;
  guint8 max_mtt_hierarchy_depth_inter_slice;
  guint8 log2_diff_max_bt_min_qt_inter_slice;
  guint8 log2_diff_max_tt_min_qt_inter_slice;
  guint8 cu_qp_delta_subdiv_inter_slice;
  guint8 cu_chroma_qp_offset_subdiv_inter_slice;

  guint8 temporal_mvp_enabled_flag;
  guint8 collocated_from_l0_flag;
  guint8 collocated_ref_idx;
  guint8 mmvd_fullpel_only_flag;
  guint8 mvd_l1_zero_flag;
  guint8 bdof_disabled_flag;
  guint8 dmvr_disabled_flag;
  guint8 prof_disabled_flag;

  GstH266PredWeightTable pred_weight_table;

  gint8 qp_delta;
  guint8 joint_cbcr_sign_flag;
  guint8 sao_luma_enabled_flag;
  guint8 sao_chroma_enabled_flag;

  guint8 deblocking_params_present_flag;
  guint8 deblocking_filter_disabled_flag;
  gint8 luma_beta_offset_div2;
  gint8 luma_tc_offset_div2;
  gint8 cb_beta_offset_div2;
  gint8 cb_tc_offset_div2;
  gint8 cr_beta_offset_div2;
  gint8 cr_tc_offset_div2;

  guint8 extension_length;
  guint8 extension_data_byte[256];

  gboolean valid;
};

/**
 * GstH266SliceHdr:
 *
 * Structure defining the H266 slice header.
 *
 * @gdr_or_irap_pic_flag: specifies that the PH syntax structure is present in
 *  the slice header.
 * @picture_header: the picture header of #GstH266PicHdr.
 * @subpic_id: specifies the subpicture ID of the subpicture.
 * @slice_address: specifies the slice address of the slice.
 * @extra_bit: could have any value.
 * @num_tiles_in_slice_minus1: specifies the number of tiles in the slice.
 * @slice_type: specifies the coding type of the slice.
 * @no_output_of_prior_pics_flag: affects the output of previously-decoded
 *  pictures in the DPB.
 * @alf_enabled_flag: specifies whether ALF is enabled for the Y, Cb, or Cr
 *  colour component of the current slice.
 * @num_alf_aps_ids_luma: specifies the number of ALF APSs.
 * @alf_aps_id_luma: specifies the aps_adaptation_parameter_set_id of the i-th
 *  ALF APS that the luma component of the slice refers to.
 * @alf_cb_enabled_flag: specifies whether ALF is enabled for the Cb colour
 *  component of the current slice.
 * @alf_cr_enabled_flag: specifies whether ALF is enabled for the Cr colour
 *  component of the current slice.
 * @alf_aps_id_chroma: specifies the aps_adaptation_parameter_set_id of the ALF
 *  APS that the chroma component of the slice refers to.
 * @alf_cc_cb_enabled_flag: specifies whether CCALF is enabled for the Cb
 *  colour component.
 * @alf_cc_cb_aps_id: specifies the aps_adaptation_parameter_set_id that the Cb
 *  colour component of the slice refers to.
 * @alf_cc_cr_enabled_flag: specifies whether CCALF is enabled for the Cr
 *  colour component of the current slice.
 * @alf_cc_cr_aps_id: specifies the aps_adaptation_parameter_set_id that the Cr
 *  colour component of the slice refers to.
 * @lmcs_used_flag: specifies that luma mapping is used for the current slice
 *  and chroma scaling could be used for the current slice.
 * @explicit_scaling_list_used_flag: specifies that the explicit scaling list
 *  is used in the scaling process for transform coefficients.
 * @ref_pic_lists: reference pictures lists of #GstH266RefPicLists.
 * @num_ref_idx_active_override_flag: specifies whether the syntax element
 *  sh_num_ref_idx_active_minus1[0] is present for P and B slices.
 * @num_ref_idx_active_minus1: is used for the derivation of the variable
 *  NumRefIdxActive[i].
 * @num_ref_idx_active: the calculated NumRefIdxActive value.
 * @cabac_init_flag: specifies the method for determining the initialization
 *  table used in the initialization process for context variables.
 * @collocated_from_l0_flag: specifies whether the collocated picture used for
 *  temporal motion vector prediction is derived from RPL 0.
 * @collocated_ref_idx: specifies the reference index of the collocated picture
 *  used for temporal motion vector prediction.
 * @pred_weight_table: prediction weight table of #GstH266PredWeightTable.
 * @qp_base: the qp base of the current slice.
 * @qp_delta: specifies the initial value of QpY to be used for the coding
 *  blocks in the slice.
 * @cb_qp_offset: specifies a difference to be added to the value of
 *  pps_cb_qp_offset when determining the value of the Qp'Cb quantization.
 * @cr_qp_offset: specifies a difference to be added to the value of
 *  pps_cr_qp_offset when determining the value of the Qp' Cr quantization.
 * @joint_cbcr_qp_offset: specifies a difference to be added to the value of
 *  pps_joint_cbcr_qp_offset_value when determining the value of the Qp'CbCr.
 * @cu_chroma_qp_offset_enabled_flag: specifies whether the
 *  cu_chroma_qp_offset_flag could be present in the transform unit and palette
 *  coding syntax of the current slice.
 * @sao_luma_used_flag: specifies whether SAO is used for the luma component
 *  in the current slice.
 * @sao_chroma_used_flag: specifies whether SAO is used for the chroma component
 *  in the current slice.
 * @deblocking_params_present_flag: specifies whether the deblocking parameters
 *  could be present in the slice header.
 * @deblocking_filter_disabled_flag: specifies whether the deblocking filter is
 *  disabled for the current slice.
 * @luma_beta_offset_div2: specify the deblocking parameter offsets for beta that
 *  are applied to the luma component for the current slice.
 * @luma_tc_offset_div2: specify the deblocking parameter offsets for tC that
 *  are applied to the luma component for the current slice.
 * @cb_beta_offset_div2: specify the deblocking parameter offsets for beta that
 *  are applied to the Cb component for the current slice.
 * @cb_tc_offset_div2: specify the deblocking parameter offsets for tC that
 *  are applied to the Cb component for the current slice.
 * @cr_beta_offset_div2: specify the deblocking parameter offsets for beta that
 *  are applied to the Cr component for the current slice.
 * @cr_tc_offset_div2: specify the deblocking parameter offsets for tC that
 *  are applied to the Cr component for the current slice.
 * @dep_quant_used_flag: specifies whether dependent quantization is used.
 * @sign_data_hiding_used_flag: specifies whether sign bit hiding is not used
 *  for the current slice.
 * @ts_residual_coding_disabled_flag: specifies whether the residual_coding
 *  syntax structure is used to parse the residual samples of a transform skip
 *  block for the current slice.
 * @ts_residual_coding_rice_idx_minus1: specifies whether Rice parameter used
 *  for the residual_ts_coding syntax structure in the current slice.
 * @reverse_last_sig_coeff_flag: specifies whether the coordinates of the last
 *  significant coefficient are coded relative to ( 0, 0 ) for each transform
 *  block of the current slice.
 * @slice_header_extension_length: specifies the length of the slice header
 *  extension data in bytes.
 * @slice_header_extension_data_byte: could have any value.
 * @num_entry_points: NumEntryPoints specifies the number of entry points in
 *  the current slice.
 * @entry_offset_len_minus1: specifies the length, in bits, of the
 *  sh_entry_point_offset_minus1[i] syntax elements.
 * @entry_point_offset_minus1: specifies the i-th entry point offset in bytes.
 * @header_size: size of the slice_header in bits.
 * @n_emulation_prevention_bytes: number of emulation prevention bytes (EPB) in
 *  this slice_header.
 *
 * Since: 1.26
 */
struct _GstH266SliceHdr
{
  guint8 picture_header_in_slice_header_flag;
  GstH266PicHdr picture_header;

  guint16 subpic_id;
  guint16 slice_address;
  guint8 extra_bit[16];
  guint8 num_tiles_in_slice_minus1;
  guint8 slice_type;
  guint8 no_output_of_prior_pics_flag;

  guint8 alf_enabled_flag;
  guint8 num_alf_aps_ids_luma;
  guint8 alf_aps_id_luma[8];
  guint8 alf_cb_enabled_flag;
  guint8 alf_cr_enabled_flag;
  guint8 alf_aps_id_chroma;
  guint8 alf_cc_cb_enabled_flag;
  guint8 alf_cc_cb_aps_id;
  guint8 alf_cc_cr_enabled_flag;
  guint8 alf_cc_cr_aps_id;

  guint8 lmcs_used_flag;
  guint8 explicit_scaling_list_used_flag;

  GstH266RefPicLists ref_pic_lists;

  guint8 num_ref_idx_active_override_flag;
  guint8 num_ref_idx_active_minus1[2];
  guint8 num_ref_idx_active[2];
  guint8 cabac_init_flag;
  guint8 collocated_from_l0_flag;
  guint8 collocated_ref_idx;

  GstH266PredWeightTable pred_weight_table;

  gint8 slice_qp_y;
  gint8 qp_delta;
  gint8 cb_qp_offset;
  gint8 cr_qp_offset;
  gint8 joint_cbcr_qp_offset;
  guint8 cu_chroma_qp_offset_enabled_flag;

  guint8 sao_luma_used_flag;
  guint8 sao_chroma_used_flag;

  guint8 deblocking_params_present_flag;
  guint8 deblocking_filter_disabled_flag;
  gint8 luma_beta_offset_div2;
  gint8 luma_tc_offset_div2;
  gint8 cb_beta_offset_div2;
  gint8 cb_tc_offset_div2;
  gint8 cr_beta_offset_div2;
  gint8 cr_tc_offset_div2;
  guint8 dep_quant_used_flag;

  guint8 sign_data_hiding_used_flag;
  guint8 ts_residual_coding_disabled_flag;
  guint8 ts_residual_coding_rice_idx_minus1;
  guint8 reverse_last_sig_coeff_flag;

  guint16 slice_header_extension_length;
  guint8 slice_header_extension_data_byte[256];

  guint16 num_entry_points;
  guint16 entry_point_start_ctu[GST_H266_MAX_ENTRY_POINTS];
  guint8 entry_offset_len_minus1;
  guint32 entry_point_offset_minus1[GST_H266_MAX_ENTRY_POINTS];

  /* Size of the slice_header() in bits */
  guint header_size;
  /* Number of emulation prevention bytes (EPB) in this slice_header() */
  guint n_emulation_prevention_bytes;
};

/**
 * GstH266AUD:
 *
 * Structure defining the H266 AU delimiter.
 *
 * @irap_or_gdr_flag: specifies whether the AU containing the AU delimiter is
 *  an IRAP or GDR AU.
 * @pic_type: indicates sh_slice_type values that could be present in the AU.
 *
 * Since: 1.26
 */
struct _GstH266AUD {
  guint8 irap_or_gdr_flag;
  guint8 pic_type;
};

/**
 * GstH266OPI:
 *
 * Structure defining the H266 operating point information.
 *
 * @ols_info_present_flag: specifies whether opi_ols_idx is present in the OPI.
 * @htid_info_present_flag: specifies whether opi_htid_plus1 is present.
 * @ols_idx: specifies that the current CVS and the next CVSs in decoding order
 *  up to and not including the next CVS for which opi_ols_idx is provided in
 *  an OPI NAL unit do not contain any other layers than those included in the
 *  OLS with OLS index equal to opi_ols_idx.
 * @htid_plus1: specifies that all the pictures in the current CVS and the next
 *  CVSs in decoding order up to and not including the next CVS for which
 *  opi_htid_plus1 is provided in an OPI NAL unit are IRAP pictures or GDR
 *  pictures with ph_recovery_poc_cnt equal to 0.
 * @extension_flag: specifies whether opi_extension_data_flag syntax elements
 *  are present.
 * @extension_data_flag: could have any value.
 *
 * Since: 1.26
 */
struct _GstH266OPI {
  guint8 ols_info_present_flag;
  guint8 htid_info_present_flag;
  guint ols_idx;
  guint8 htid_plus1;
  guint8 extension_flag;
  guint8 extension_data_flag;

  /* extension_data */
};

/**
 * GstH266DCI:
 *
 * Structure defining the H266 decoding capability information.
 *
 * @num_ptls_minus1: specifies the number of profile_tier_level syntax
 *  structures in the DCI NAL unit.
 * @extension_flag: specifies whether dci_extension_data_flag syntax elements
 *  are present.
 * @extension_data_flag: could have any value.
 *
 * Since: 1.26
 */
struct _GstH266DCI {
  guint8 num_ptls_minus1;
  GstH266ProfileTierLevel profile_tier_level[15];
  guint8 extension_flag;
  guint8 extension_data_flag;

  /* extension_data */
};

/**
 * GstH266BufferingPeriod:
 *
 * Structure defining the H266 buffering period.
 *
 * @nal_hrd_params_present_flag: specifies whether a list of syntax element
 *  pairs bp_nal_initial_cpb_removal_delay and bp_nal_initial_cpb_removal_offset
 *  are present in the BP SEI message.
 * @vcl_hrd_params_present_flag: specifies whether a list of syntax element
 *  pairs bp_vcl_initial_cpb_removal_delay and bp_vcl_initial_cpb_removal_offset
 *  are present in the BP SEI message.
 * @cpb_initial_removal_delay_length_minus1: specifies the length, in bits, of
 *  the initial cpb removal syntax elements.
 * @cpb_removal_delay_length_minus1: specifies the length, in bits, of the
 *  cpb removal syntax elements.
 * @dpb_output_delay_length_minus1: specifies the length, in bits, of the
 *  syntax dpb output syntax elements.
 * @du_hrd_params_present_flag: specifies whether DU level HRD parameters are
 *  present and the HRD can be operated at the AU level or DU level.
 * @du_cpb_removal_delay_increment_length_minus1: specifies the length, in bits,
 *  of the du cpb removal syntax elements.
 * @dpb_output_delay_du_length_minus1: specifies the length, in bits, of the
 *  dpb output syntax element.
 * @du_cpb_params_in_pic_timing_sei_flag: specifies whether DU level CPB removal
 *  delay parameters are present in PT SEI messages.
 * @du_dpb_params_in_pic_timing_sei_flag: specifies whether DU level DPB output
 *  delay parameters are present in PT SEI messages.
 * @concatenation_flag: indicates whether the nominal CPB removal time of the
 *  current AU is determined relative to the nominal CPB removal time of the
 *  previous AU.
 * @additional_concatenation_info_present_flag: specifies whether the syntax
 *  element bp_max_initial_removal_delay_for_concatenation is present in the BP
 *  SEI message and the syntax element pt_delay_for_concatenation_ensured_flag
 *  is present in the PT SEI messages.
 * @max_initial_removal_delay_for_concatenation: identify whether the nominal
 *  removal time from the CPB of the first AU of a following BP computed with
 *  bp_cpb_removal_delay_delta_minus1 applies.
 * @cpb_removal_delay_delta_minus1: specifies a CPB removal delay increment
 *  value relative to the nominal CPB removal time of the AU prevNonDiscardableAu.
 * @max_sublayers_minus1: specifies whether maximum number of temporal sublayers
 *  for which the initial CPB removal delay and the initial CPB removal offset
 *  are indicated in the BP SEI message.
 * @cpb_removal_delay_deltas_present_flag: specifies whether the BP SEI message
 *  contains CPB removal delay deltas.
 * @num_cpb_removal_delay_deltas_minus1: specifies the number of syntax elements
 *  bp_cpb_removal_delay_delta_val[i] in the BP SEI message.
 * @cpb_removal_delay_delta_val: specifies the i-th CPB removal delay delta.
 * @cpb_cnt_minus1: specifies the number of syntax element pairs
 *  bp_nal_initial_cpb_removal_delay and bp_nal_initial_cpb_removal_offset
 *  of the i-th temporal sublayer.
 * @sublayer_initial_cpb_removal_delay_present_flag: specifies that initial CPB
 *  removal delay related syntax elements are present for sublayer representation.
 * @nal_initial_cpb_removal_delay: specify the j-th default initial CPB removal
 *  delay for the NAL HRD in units of a 90 kHz clock of the i-th temporal sublayer.
 * @nal_initial_cpb_removal_offset: specify the j-th default initial CPB removal
 *  offset of the i-th temporal sublayer for the NAL HRD in units of a 90 kHz
 *  clock.
 * @nal_initial_alt_cpb_removal_delay: specify the j-th alternative initial CPB
 *  removal delay for the NAL HRD in units of a 90 kHz clock of the i-th
 *  temporal sublayer.
 * @nal_initial_alt_cpb_removal_offset: specify the j-th alternative initial CPB
 *  removal offset of the i-th temporal sublayer for the NAL HRD in units of a
 *  90 kHz clock.
 * @vcl_initial_cpb_removal_delay: specify the j-th default initial CPB removal
 *  delay of the i-th temporal sublayer for the VCL HRD in units of a 90 kHz clock.
 * @vcl_initial_cpb_removal_offset: specify the j-th default initial CPB removal
 *  offset of the i-th temporal sublayer for the VCL HRD in units of a 90 kHz clock.
 * @vcl_initial_alt_cpb_removal_delay: specify the j-th alternative initial CPB
 *  removal delay of the i-th temporal sublayer for the VCL HRD in units of a
 *  90 kHz clock.
 * @vcl_initial_alt_cpb_removal_offset: specify the j-th alternative initial CPB
 *  removal offset of the i-th temporal sublayer for the VCL HRD in units of a
 *  90 kHz clock.
 * @sublayer_dpb_output_offsets_present_flag: specifies whether DPB output time
 *  offsets are present for sublayer representation.
 * @dpb_output_tid_offset: specifies the difference between the DPB output times
 *  for the i-th sublayer representation.
 * @alt_cpb_params_present_flag: specifies the presence of the syntax element
 *  bp_use_alt_cpb_params_flag.
 * @use_alt_cpb_params_flag: could be used to derive the value of
 *  UseAltCpbParamsFlag.
 *
 * Since: 1.26
 */
struct _GstH266BufferingPeriod {
  guint8 nal_hrd_params_present_flag;
  guint8 vcl_hrd_params_present_flag;
  guint8 cpb_initial_removal_delay_length_minus1;
  guint8 cpb_removal_delay_length_minus1;
  guint8 dpb_output_delay_length_minus1;
  guint8 du_hrd_params_present_flag;
  guint8 du_cpb_removal_delay_increment_length_minus1;
  guint8 dpb_output_delay_du_length_minus1;
  guint8 du_cpb_params_in_pic_timing_sei_flag;
  guint8 du_dpb_params_in_pic_timing_sei_flag;
  guint8 concatenation_flag;
  guint8 additional_concatenation_info_present_flag;
  guint8 max_initial_removal_delay_for_concatenation;
  guint8 cpb_removal_delay_delta_minus1;
  guint8 max_sublayers_minus1;
  guint8 cpb_removal_delay_deltas_present_flag;
  guint8 num_cpb_removal_delay_deltas_minus1;
  guint8 cpb_removal_delay_delta_val[16];
  guint8 cpb_cnt_minus1;
  guint8 sublayer_initial_cpb_removal_delay_present_flag;
  guint8 nal_initial_cpb_removal_delay[8][32];
  guint8 nal_initial_cpb_removal_offset[8][32];
  guint8 nal_initial_alt_cpb_removal_delay[8][32];
  guint8 nal_initial_alt_cpb_removal_offset[8][32];
  guint8 vcl_initial_cpb_removal_delay[8][32];
  guint8 vcl_initial_cpb_removal_offset[8][32];
  guint8 vcl_initial_alt_cpb_removal_delay[8][32];
  guint8 vcl_initial_alt_cpb_removal_offset[8][32];
  guint8 sublayer_dpb_output_offsets_present_flag;
  guint32 dpb_output_tid_offset[8];
  guint8 alt_cpb_params_present_flag;
  guint8 use_alt_cpb_params_flag;
};

/**
 * GstH266PicTiming:
 *
 * Structure defining the H266 picture timing.
 *
 * @cpb_removal_delay_minus: calculate the number of clock ticks between the
 *  nominal CPB removal times of the AU associated with the PT SEI message.
 * @sublayer_delays_present_flag: specifies whether cpb removal values are
 *  present for the sublayer with TemporalId equal to i.
 * @cpb_removal_delay_delta_enabled_flag: specifies whether
 *  pt_cpb_removal_delay_delta_idx[i] is present in the PT SEI message.
 * @cpb_removal_delay_delta_idx: specifies the index of the CPB removal delta.
 * @cpb_removal_delay_minus1: is used to calculate the number of clock ticks
 *  between the nominal CPB removal times of the AU.
 * @dpb_output_delay: is used to compute the DPB output time of the AU.
 * @cpb_alt_timing_info_present_flag: specifies whether the cpb alt syntax
 *  elements could be present in the PT SEI message.
 * @nal_cpb_alt_initial_removal_delay_delta: specifies whether alternative
 *  initial CPB removal delay delta for the i-th sublayer for the j-th CPB for
 *  the NAL HRD in units of a 90 kHz clock.
 * @nal_cpb_alt_initial_removal_offset_delta: specifies whether alternative
 *  initial CPB removal offset delta for the i-th sublayer for the j-th CPB for
 *  the NAL HRD in units of a 90 kHz clock.
 * @nal_cpb_delay_offset: specifies an offset to be used in the derivation of
 *  the nominal CPB removal times of the AU.
 * @nal_dpb_delay_offset: specifies an offset to be used in the derivation of
 *  the DPB output times of the IRAP AU.
 * @vcl_cpb_alt_initial_removal_delay_delta: specifies the alternative initial
 *  CPB removal delay delta for the i-th sublayer for the j-th CPB for the VCL
 *  HRD in units of a 90 kHz clock.
 * @vcl_cpb_alt_initial_removal_offset_delta: specifies the alternative initial
 *  CPB removal offset delta for the i-th sublayer for the j-th CPB for the VCL
 *  HRD in units of a 90 kHz clock.
 * @vcl_cpb_delay_offset: specifies an offset to be used in the derivation of
 *  the nominal CPB removal times of the AU.
 * @vcl_dpb_delay_offset: specifies an offset to be used in the derivation of
 *  the DPB output times of the IRAP AU.
 * @dpb_output_du_delay: is used to compute the DPB output time of the AU when
 *  DecodingUnitHrdFlag is equal to 1.
 * @num_decoding_units_minus1: specifies the number of DUs in the AU the PT SEI
 *  message is associated with.
 * @du_common_cpb_removal_delay_flag: specifies whether the syntax elements
 *  pt_du_common_cpb_removal_delay_increment_minus1[i] are present.
 * @du_common_cpb_removal_delay_increment_minus1: specifies the duration between
 *  the nominal CPB removal times of any two consecutive DUs in decoding order
 *  in the AU.
 * @num_nalus_in_du_minus1: specifies the number of NAL units in the i-th DU of
 *  the AU the PT SEI message is associated with.
 * @du_cpb_removal_delay_increment_minus1: specifies the duration between the
 *  nominal CPB removal times of the (i + 1)-th DU and the i-th DU.
 * @delay_for_concatenation_ensured_flag: specifies that the difference between
 *  the final arrival time and the CPB removal time of the AU is present.
 * @display_elemental_periods_minus1: indicates the number of elemental picture
 *  period intervals.
 *
 * Since: 1.26
 */
struct _GstH266PicTiming {
  guint8 cpb_removal_delay_minus;
  guint8 sublayer_delays_present_flag[8];
  guint8 cpb_removal_delay_delta_enabled_flag[8];
  guint8 cpb_removal_delay_delta_idx[8];
  guint8 cpb_removal_delay_minus1[8];
  guint8 dpb_output_delay;
  guint8 cpb_alt_timing_info_present_flag;
  guint8 nal_cpb_alt_initial_removal_delay_delta[8][32];
  guint8 nal_cpb_alt_initial_removal_offset_delta[8][32];
  guint8 nal_cpb_delay_offset[8];
  guint8 nal_dpb_delay_offset[8];
  guint8 vcl_cpb_alt_initial_removal_delay_delta[8][32];
  guint8 vcl_cpb_alt_initial_removal_offset_delta[8][32];
  guint8 vcl_cpb_delay_offset[8];
  guint8 vcl_dpb_delay_offset[8];
  guint8 dpb_output_du_delay;
  guint32 num_decoding_units_minus1;
  guint8 du_common_cpb_removal_delay_flag;
  guint8 du_common_cpb_removal_delay_increment_minus1[8];
  /* TODO: PicSizeInCtbsY could be very large */
  guint32 num_nalus_in_du_minus1[600];
  guint8 du_cpb_removal_delay_increment_minus1[600][8];
  guint8 delay_for_concatenation_ensured_flag;
  guint8 display_elemental_periods_minus1;
};

/**
 * GstH266DUInfo:
 *
 * Structure defining the H266 decoding unit info.
 *
 * @decoding_unit_idx: specifies the index to the list of DUs in the current AU.
 * @sublayer_delays_present_flag: specifies whether
 *  dui_du_cpb_removal_delay_increment[i] is present for the sublayer.
 * @du_cpb_removal_delay_increment: specifies the duration between the nominal
 *  CPB times of the last DU in decoding order in the current AU.
 * @dpb_output_du_delay_present_flag: specifies the presence of the
 *  dui_dpb_output_du_delay syntax element in the DUI SEI message.
 * @dpb_output_du_delay: is used to compute the DPB output time of the AU.
 *
 * Since: 1.26
 */
struct _GstH266DUInfo {
  guint32 decoding_unit_idx;
  guint8 sublayer_delays_present_flag[8];
  guint8 du_cpb_removal_delay_increment[8];
  guint8 dpb_output_du_delay_present_flag;
  guint8 dpb_output_du_delay;
};

/**
 * GstH266ScalableNesting:
 *
 * Structure defining the H266 scalable nesting.
 *
 * @ols_flag: specifies whether the scalable-nested SEI messages apply to
 *  specific OLSs.
 * @subpic_flag: specifies whether the scalable-nested SEI messages that apply
 *  to specified OLSs or layers apply only to specific subpictures of the
 *  specified OLSs or layers.
 * @num_olss_minus1: specifies the number of OLSs to which the scalable-nested
 *  SEI messages apply.
 * @ols_idx_delta_minus1: is used to derive the variable NestingOlsIdx[i].
 * @all_layers_flag: specifies whether the scalable-nested SEI messages apply to
 *  all layers that have nuh_layer_id greater than or equal to the nuh_layer_id
 *  of the current SEI NAL unit.
 * @num_layers_minus1: specifies the number of layers to which the
 *  scalable-nested SEI messages apply.
 * @layer_id: specifies the nuh_layer_id value of the i-th layer to which the
 *  scalable-nested SEI messages apply.
 * @num_subpics_minus1: specifies the number of subpictures in each picture in
 *  the multiSubpicLayers.
 * @subpic_id_len_minus1: specifies the number of bits used to represent the
 *  syntax element sn_subpic_id[i].
 * @subpic_id: indicates the subpicture ID of the i-th subpicture in each
 *  picture in the multiSubpicLayers.
 * @num_seis_minus1: specifies the number of scalable-nested SEI messages.
 *
 * Since: 1.26
 */
struct _GstH266ScalableNesting {
  guint8 ols_flag;
  guint8 subpic_flag;
  guint8 num_olss_minus1;
  guint8 ols_idx_delta_minus1[GST_H266_MAX_TOTAL_NUM_OLSS];
  guint8 all_layers_flag;
  guint8 num_layers_minus1;
  guint8 layer_id[GST_H266_MAX_LAYERS];
  guint16 num_subpics_minus1;
  guint8 subpic_id_len_minus1;
  guint8 subpic_id[GST_H266_MAX_SLICES_PER_AU];
  guint8 num_seis_minus1;
};

/**
 * GstH266SubPicLevelInfo:
 *
 * Structure defining the H266 subpicture level information.
 *
 * @num_ref_levels_minus1: specifies the number of reference levels signalled
 *  for each subpicture sequences.
 * @cbr_constraint_flag: specifies whether to decode the sub-bitstreams
 *  resulting from extraction of any subpicture sequence.
 * @explicit_fraction_present_flag: specifies whether the syntax elements
 *  sli_ref_level_fraction_minus1[ i ] are present.
 * @num_subpics_minus1: specifies the number of subpictures in the pictures in
 *  the multiSubpicLayers in targetCvss.
 * @max_sublayers_minus1: specifies the maximum number of temporal sublayers in
 *  the subpicture sequences.
 * @sublayer_info_present_flag: specifies whether the level information for
 *  subpicture sequences is present for sublayer representation.
 * @non_subpic_layers_fraction: indicates the i-th fraction of the bitstream
 *  level limits associated with layers in targetCvss.
 * @ref_level_idc: indicates the i-th level to which each subpicture sequence
 *  conforms as specified in Annex A.
 * @ref_level_fraction_minus1: specifies the i-th fraction of the level limits
 *  for the subpictures.
 *
 * Since: 1.26
 */
struct _GstH266SubPicLevelInfo {
  guint8 num_ref_levels_minus1;
  guint8 cbr_constraint_flag;
  guint8 explicit_fraction_present_flag;
  guint16 num_subpics_minus1;
  guint8 max_sublayers_minus1;
  guint8 sublayer_info_present_flag;
  guint8 non_subpic_layers_fraction[GST_H266_MAX_SLI_REF_LEVELS][GST_H266_MAX_SUBLAYERS];
  guint8 ref_level_idc[GST_H266_MAX_SLI_REF_LEVELS][GST_H266_MAX_SUBLAYERS];
  guint8 ref_level_fraction_minus1[GST_H266_MAX_SLI_REF_LEVELS][GST_H266_MAX_SLICES_PER_AU][GST_H266_MAX_SUBLAYERS];
};

/**
 * GstH266FrameFieldInfo:
 *
 * Structure defining the H266 frame field information.
 *
 * @field_pic_flag: indicates whether the display model considers the current
 *  picture as a field.
 * @bottom_field_flag: indicates whether the current picture is a bottom field.
 * @pairing_indicated_flag: indicates whether the current picture is considered
 *  paired with the next picture in output order or with the previous picture
 *  in output order as the two fields of a frame.
 * @paired_with_next_field_flag: indicates whether the current picture is
 *  considered paired with the next picture as the two fields of a frame.
 * @display_fields_from_frame_flag: indicates whether the display model operates
 *  by sequentially displaying the individual fields of the frame with
 *  alternating parity.
 * @top_field_first_flag: indicates that the first field of the frame that is
 *  displayed by the display model is the top field.
 * @display_elemental_periods_minus1: indicates the number of elemental picture
 *  period intervals that the current coded picture or field occupies for the
 *  display model.
 * @source_scan_type; indicates whether the source scan type of the associated
 *  picture should be interpreted as progressive.
 * @duplicate_flag: indicates whether the current picture is indicated to be a
 *  duplicate of a previous picture in output order.
 * @valid: whether this frame field info is valid.
 *
 * Since: 1.26
 */
struct _GstH266FrameFieldInfo {
  guint8 field_pic_flag;
  guint8 bottom_field_flag;
  guint8 pairing_indicated_flag;
  guint8 paired_with_next_field_flag;
  guint8 display_fields_from_frame_flag;
  guint8 top_field_first_flag;
  guint8 display_elemental_periods_minus1;
  guint8 source_scan_type;
  guint8 duplicate_flag;
  gboolean valid;
};

/**
 * GstH266SEIMessage:
 *
 * Structure defining the H266 sei message.
 *
 * @payloadType: the payload type of #GstH266SEIPayloadType.
 * @buffering_period: buffering period sei of #GstH266BufferingPeriod.
 * @pic_timing: picture timing sei of #GstH266PicTiming.
 * @du_info: decoding unit info sei of #GstH266DUInfo.
 * @scalable_nesting: scalable nesting sei of #GstH266ScalableNesting.
 * @subpic_level_info: subpicture level info sei of #GstH266SubPicLevelInfo.
 * @frame_field_info: frame field info sei of #GstH266FrameFieldInfo.
 *
 * Since: 1.26
 */
struct _GstH266SEIMessage
{
  GstH266SEIPayloadType payloadType;

  union {
    GstH266BufferingPeriod buffering_period;
    GstH266PicTiming pic_timing;
    GstH266DUInfo du_info;
    GstH266ScalableNesting scalable_nesting;
    GstH266SubPicLevelInfo subpic_level_info;
    GstH266FrameFieldInfo frame_field_info;

    /* ... could implement more */
  } payload;
};

/**
  * GstH266DecoderConfigRecordNalUnitArray:
  *
  * Contains NAL Unit array data as defined in ISO/IEC 14496-15
  *
  * Since: 1.26
 */
struct _GstH266DecoderConfigRecordNalUnitArray
{
  /**
   * GstH266DecoderConfigRecordNalUnitArray.array_completeness:
   *
   * 1: all NAL units of the given type are in this array and none
   *   are in the stream.
   * 0: additional NAL units of the indicated type may be in the stream
   */
  guint8 array_completeness;

  /**
   * GstH266DecoderConfigRecordNalUnitArray.nal_unit_type:
   *
   * Indicates the type of the NAL units in the following array.
   * Shall be VPS, SPS, PPS, prefix APS or suffix APS
   */
  GstH266NalUnitType nal_unit_type;

  /**
   * GstH266DecoderConfigRecordNalUnitArray.nalu:
   *
   * Array of identified #GstH266NalUnit
   */
  GArray *nalu;
};

/**
 * GstH266PTLRecord:
 *
 * Contains VvcPTLRecord data as defined in ISO/IEC 14496-15
 *
 * @num_bytes_constraint_info: Number of bytes for constraint information.
 * @general_profile_idc: General profile id.
 * @general_tier_flag: General tier flag.
 * @general_level_idc: General level id.
 * @ptl_frame_only_constraint_flag: Frame-only constraint flag.
 * @ptl_multilayer_enabled_flag: Multilayer enabled flag.
 * @general_constraint_info: Array containing general constraint information.
 * @ptl_sublayer_level_present_flag: Array indicating presence of sublayer level.
 * @sublayer_level_idc: Array containing sublayer level ids.
 * @ptl_num_sub_profiles: Number of sub-profiles.
 * @general_sub_profile_idc: Array containing general sub-profile ids.
 *
 * Since: 1.26
 */
struct _GstH266PTLRecord {
  guint8 num_bytes_constraint_info;
  guint8 general_profile_idc;
  guint8 general_tier_flag;
  guint8 general_level_idc;
  guint8 ptl_frame_only_constraint_flag;
  guint8 ptl_multilayer_enabled_flag;
  guint8 general_constraint_info[63];
  guint8 ptl_sublayer_level_present_flag[7];
  guint8 sublayer_level_idc[7];
  guint8 ptl_num_sub_profiles;
  guint32 general_sub_profile_idc[255];
};

/**
 * GstH266DecoderConfigRecord:
 *
 * Contains VVCDecoderConfigurationRecord data as defined in ISO/IEC 14496-15
 *
 * Since: 1.26
 */
struct _GstH266DecoderConfigRecord
{
  /**
   * GstH266DecoderConfigRecord.length_size_minus_one:
   *
   * indicates the length in bytes of nal unit length field.
   * This value shall be one of 0, 1, or 3 corresponding to a length
   * encoded with 1, 2, or 4 bytes, respectively
   */
  guint8 length_size_minus_one;

  /**
   * GstH266DecoderConfigRecord.ptl_present_flag:
   *
   * true: profile, tier and level information is present
   */
  guint8 ptl_present_flag;

  /**
   * GstH266DecoderConfigRecord.ols_idx:
   *
   * Operating point layer set index
   */
  guint16 ols_idx;

  /**
   * GstH266DecoderConfigRecord.num_sublayers:
   *
   * Number of sublayers
   */
  guint8 num_sublayers;

  /**
   * GstH266DecoderConfigRecord.constant_frame_rate:
   *
   * Indicates if the frame rate is constant
   */
  guint8 constant_frame_rate;

  /**
   * GstH266DecoderConfigRecord.chroma_format_idc:
   *
   * Chroma format indicator
   */
  guint8 chroma_format_idc;

  /**
   * GstH266DecoderConfigRecord.bit_depth_minus8:
   *
   * Bit depth minus 8
   */
  guint8 bit_depth_minus8;

  /**
    * GstH266DecoderConfigRecord.native_ptl:
    *
    * Profile, tier and level information
   */
  GstH266PTLRecord native_ptl;

  /**
   * GstH266DecoderConfigRecord.max_picture_width:
   *
   * Maximum picture width
   */
  guint16 max_picture_width;

  /**
   * GstH266DecoderConfigRecord.max_picture_height:
   *
   * Maximum picture height
   */
  guint16 max_picture_height;

  /**
   * GstH266DecoderConfigRecord.avg_frame_rate:
   *
   * Average frame rate
   */
  guint16 avg_frame_rate;

  /**
   * GstH266DecoderConfigRecord.nalu_array:
   *
   * Array of #GstH266DecoderConfigRecordNalUnitArray
   */
  GArray *nalu_array;

  /*< private >*/
  gpointer _gst_reserved[GST_PADDING];
};

/**
 * GstH266Parser:
 *
 * H266 NAL Parser (opaque structure).
 *
 * Since: 1.26
 */
struct _GstH266Parser
{
  /*< private >*/
  GstH266VPS vps[GST_H266_MAX_VPS_COUNT];
  GstH266SPS sps[GST_H266_MAX_SPS_COUNT];
  GstH266PPS pps[GST_H266_MAX_PPS_COUNT];
  GstH266APS aps[GST_H266_APS_TYPE_MAX][GST_H266_MAX_APS_COUNT];
  GstH266VPS *last_vps;
  GstH266SPS *last_sps;
  GstH266PPS *last_pps;
  GstH266APS *last_aps[GST_H266_APS_TYPE_MAX];
  GstH266PicHdr ph;
  GstH266SEIMessage buffering_period;
  GstH266SEIMessage *last_buffering_period;

  GstH266VPS *active_vps;
  GstH266SPS *active_sps;
  GstH266PPS *active_pps;

  guint16 ctb_addr_in_slice[GST_H266_MAX_CTUS_IN_PICTURE];
  guint16 slice_start_offset[GST_H266_MAX_SLICES_PER_AU];
  guint16 num_ctus_in_slice[GST_H266_MAX_SLICES_PER_AU];
  guint16 ctb_to_tile_col_bd[GST_H266_MAX_CTUS_IN_PICTURE];
  guint16 ctb_to_tile_row_bd[GST_H266_MAX_CTUS_IN_PICTURE];
};

GST_CODEC_PARSERS_API
GstH266Parser *     gst_h266_parser_new                (void);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parser_identify_nalu      (GstH266Parser * parser,
                                                        const guint8 * data,
                                                        guint offset,
                                                        gsize size,
                                                        GstH266NalUnit * nalu);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parser_identify_nalu_unchecked (GstH266Parser * parser,
                                                             const guint8 * data,
                                                             guint offset,
                                                             gsize size,
                                                             GstH266NalUnit * nalu);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parser_identify_nalu_vvc  (GstH266Parser * parser,
                                                        const guint8 * data,
                                                        guint offset,
                                                        gsize size,
                                                        guint8 nal_length_size,
                                                        GstH266NalUnit * nalu);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parser_parse_nal          (GstH266Parser * parser,
                                                        GstH266NalUnit * nalu);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parser_parse_aud          (GstH266Parser * parser,
                                                        GstH266NalUnit * nalu,
                                                        GstH266AUD * aud);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parser_parse_opi          (GstH266Parser * parser,
                                                        GstH266NalUnit * nalu,
                                                        GstH266OPI * opi);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parser_parse_dci          (GstH266Parser * parser,
                                                        GstH266NalUnit * nalu,
                                                        GstH266DCI * dci);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parser_parse_picture_hdr  (GstH266Parser * parser,
                                                        GstH266NalUnit * nalu,
                                                        GstH266PicHdr * picture);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parser_parse_slice_hdr    (GstH266Parser * parser,
                                                        GstH266NalUnit * nalu,
                                                        GstH266SliceHdr * slice);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parser_parse_vps          (GstH266Parser * parser,
                                                        GstH266NalUnit * nalu,
                                                        GstH266VPS * vps);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parser_parse_sps          (GstH266Parser * parser,
                                                        GstH266NalUnit * nalu,
                                                        GstH266SPS * sps);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parser_parse_pps          (GstH266Parser * parser,
                                                        GstH266NalUnit * nalu,
                                                        GstH266PPS * pps);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parser_parse_aps          (GstH266Parser * parser,
                                                        GstH266NalUnit * nalu,
                                                        GstH266APS * aps);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parser_parse_sei          (GstH266Parser * parser,
                                                        GstH266NalUnit * nalu,
                                                        GArray ** messages);
GST_CODEC_PARSERS_API
void                gst_h266_parser_free               (GstH266Parser * parser);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parse_vps                 (GstH266NalUnit * nalu,
                                                        GstH266VPS * vps);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parse_sps                 (GstH266Parser * parser,
                                                        GstH266NalUnit * nalu,
                                                        GstH266SPS * sps);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parse_pps                 (GstH266Parser * parser,
                                                        GstH266NalUnit * nalu,
                                                        GstH266PPS * pps);
GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parse_aps                 (GstH266Parser * parser,
                                                        GstH266NalUnit * nalu,
                                                        GstH266APS * aps);
GST_CODEC_PARSERS_API
const gchar *       gst_h266_profile_to_string         (GstH266Profile profile);
GST_CODEC_PARSERS_API
GstH266Profile      gst_h266_profile_from_string       (const gchar * string);

GST_CODEC_PARSERS_API
void                gst_h266_decoder_config_record_free (GstH266DecoderConfigRecord * config);

GST_CODEC_PARSERS_API
GstH266ParserResult gst_h266_parser_parse_decoder_config_record (GstH266Parser * parser,
                                                                 const guint8 * data,
                                                                 gsize size,
                                                                 GstH266DecoderConfigRecord ** config);

G_END_DECLS
