#include <stdbool.h>
#include "libavcodec/cabac.h"
#include "libavutil/mem_internal.h"
#include "dec.h"

Data Structures
struct	NeighbourAvailable

struct	TransformBlock

struct	TransformUnit

struct	Mv

struct	MvField

struct	DMVRInfo

struct	MotionInfo

struct	PredictionUnit

struct	Palette

struct	CodingUnit

struct	CTU

struct	ReconstructedArea

struct	VVCCabacState

struct	EntryPoint

struct	VVCLocalContext

struct	VVCAllowedSplit

struct	SAOParams

struct	ALFParams

struct	VVCRect

Macros
#define	MAX_CTU_SIZE 128

#define	MAX_CU_SIZE MAX_CTU_SIZE

#define	MIN_CU_SIZE 4

#define	MIN_CU_LOG2 2

#define	MAX_CU_DEPTH 7

#define	MAX_PALETTE_CU_SIZE 64

#define	MAX_PARTS_IN_CTU ((MAX_CTU_SIZE >> MIN_CU_LOG2) * (MAX_CTU_SIZE >> MIN_CU_LOG2))

#define	MIN_PU_SIZE 4

#define	MAX_TB_SIZE 64

#define	MIN_TU_SIZE 4

#define	MAX_TUS_IN_CU 64

#define	MAX_QP 63

#define	MAX_PB_SIZE 128

#define	MAX_SCALING_RATIO 8

#define	EDGE_EMU_BUFFER_STRIDE ((MAX_PB_SIZE + 32) * MAX_SCALING_RATIO)

#define	CHROMA_EXTRA_BEFORE 1

#define	CHROMA_EXTRA_AFTER 2

#define	CHROMA_EXTRA 3

#define	LUMA_EXTRA_BEFORE 3

#define	LUMA_EXTRA_AFTER 4

#define	LUMA_EXTRA 7

#define	BILINEAR_EXTRA_BEFORE 0

#define	BILINEAR_EXTRA_AFTER 1

#define	BILINEAR_EXTRA 1

#define	SCALED_INT(pos)

#define	MAX_CONTROL_POINTS 3

#define	AFFINE_MIN_BLOCK_SIZE 4

#define	MRG_MAX_NUM_CANDS 6

#define	MAX_NUM_HMVP_CANDS 5

#define	SAO_PADDING_SIZE 1

#define	ALF_PADDING_SIZE 8

#define	ALF_BLOCK_SIZE 4

#define	ALF_BORDER_LUMA 3

#define	ALF_BORDER_CHROMA 2

#define	ALF_VB_POS_ABOVE_LUMA 4

#define	ALF_VB_POS_ABOVE_CHROMA 2

#define	ALF_GRADIENT_STEP 2

#define	ALF_GRADIENT_BORDER 2

#define	ALF_GRADIENT_SIZE ((MAX_CU_SIZE + ALF_GRADIENT_BORDER * 2) / ALF_GRADIENT_STEP)

#define	ALF_NUM_DIR 4

#define	ALF_MAX_BLOCKS_IN_CTU (MAX_CTU_SIZE * MAX_CTU_SIZE / ALF_BLOCK_SIZE / ALF_BLOCK_SIZE)

#define	ALF_MAX_FILTER_SIZE (ALF_MAX_BLOCKS_IN_CTU * ALF_NUM_COEFF_LUMA)

#define	SAMPLE(tab, x, y)
	Value of the luma sample at position (x, y) in the 2D array tab.

#define	SAMPLE_CTB(tab, x, y)

#define	CTB(tab, x, y)

#define	VVC_CONTEXTS 378

#define	BOUNDARY_LEFT_SLICE (1 << 0)

#define	BOUNDARY_LEFT_TILE (1 << 1)

#define	BOUNDARY_LEFT_SUBPIC (1 << 2)

#define	BOUNDARY_UPPER_SLICE (1 << 3)

#define	BOUNDARY_UPPER_TILE (1 << 4)

#define	BOUNDARY_UPPER_SUBPIC (1 << 5)

Enumerations
enum	SAOType { SAO_NOT_APPLIED = 0 , SAO_BAND , SAO_EDGE }

enum	SAOEOClass { SAO_EO_HORIZ = 0 , SAO_EO_VERT , SAO_EO_135D , SAO_EO_45D }

enum	IspType { ISP_NO_SPLIT , ISP_HOR_SPLIT , ISP_VER_SPLIT }

enum	VVCSplitMode { SPLIT_NONE , SPLIT_TT_HOR , SPLIT_BT_HOR , SPLIT_TT_VER , SPLIT_BT_VER , SPLIT_QT }

enum	MtsIdx { MTS_DCT2_DCT2 , MTS_DST7_DST7 , MTS_DST7_DCT8 , MTS_DCT8_DST7 , MTS_DCT8_DCT8 }

enum	VVCTreeType { SINGLE_TREE , DUAL_TREE_LUMA , DUAL_TREE_CHROMA }

enum	PredMode { MODE_INTER , MODE_INTRA , MODE_SKIP , MODE_PLT , MODE_IBC }

enum	MotionModelIdc { MOTION_TRANSLATION , MOTION_4_PARAMS_AFFINE , MOTION_6_PARAMS_AFFINE }

enum	PredFlag { PF_INTRA = 0x0 , PF_L0 = 0x1 , PF_L1 = 0x2 , PF_BI = 0x3 , PF_IBC = PF_L0 \| 0x4 , PF_PLT = 0x8 }

enum	IntraPredMode { INTRA_INVALID = -1 , INTRA_PLANAR = 0 , INTRA_DC , INTRA_HORZ = 18 , INTRA_DIAG = 34 , INTRA_VERT = 50 , INTRA_VDIAG = 66 , INTRA_LT_CCLM = 81 , INTRA_L_CCLM , INTRA_T_CCLM }

Functions
int	ff_vvc_coding_tree_unit (VVCLocalContext *lc, int ctu_idx, int rs, int rx, int ry)
	parse a CTU

void	ff_vvc_set_neighbour_available (VVCLocalContext *lc, int x0, int y0, int w, int h)

void	ff_vvc_decode_neighbour (VVCLocalContext *lc, int x_ctb, int y_ctb, int rx, int ry, int rs)

void	ff_vvc_ctu_free_cus (CodingUnit **cus)

int	ff_vvc_get_qPy (const VVCFrameContext *fc, int xc, int yc)

void	ff_vvc_ep_init_stat_coeff (EntryPoint *ep, int bit_depth, int persistent_rice_adaptation_enabled_flag)

void	ff_vvc_channel_range (int start, int end, VVCTreeType tree_type, uint8_t chroma_format_idc)

Macro Definition Documentation

◆ MAX_CTU_SIZE

#define MAX_CTU_SIZE 128

Definition at line 33 of file ctu.h.

Referenced by check_alf_classify(), check_alf_filter(), check_avg(), check_put_vvc_chroma(), check_put_vvc_chroma_uni(), check_put_vvc_luma(), check_put_vvc_luma_uni(), check_sao_band(), check_sao_edge(), check_vvc_sad(), get_alf_vb_pos(), and ibc_tl_init().

◆ MAX_CU_SIZE

#define MAX_CU_SIZE MAX_CTU_SIZE

Definition at line 35 of file ctu.h.

◆ MIN_CU_SIZE

#define MIN_CU_SIZE 4

Definition at line 36 of file ctu.h.

◆ MIN_CU_LOG2

#define MIN_CU_LOG2 2

Definition at line 37 of file ctu.h.

Referenced by ff_vvc_store_sb_mvs().

◆ MAX_CU_DEPTH

#define MAX_CU_DEPTH 7

Definition at line 38 of file ctu.h.

Referenced by ff_vvc_store_sb_mvs(), and init_subblock_params().

◆ MAX_PALETTE_CU_SIZE

#define MAX_PALETTE_CU_SIZE 64

Definition at line 39 of file ctu.h.

Referenced by hls_palette_coding().

◆ MAX_PARTS_IN_CTU

#define MAX_PARTS_IN_CTU ((MAX_CTU_SIZE >> MIN_CU_LOG2) * (MAX_CTU_SIZE >> MIN_CU_LOG2))

Definition at line 41 of file ctu.h.

◆ MIN_PU_SIZE

#define MIN_PU_SIZE 4

Definition at line 43 of file ctu.h.

Referenced by set_dmvr_info().

◆ MAX_TB_SIZE

#define MAX_TB_SIZE 64

Definition at line 45 of file ctu.h.

◆ MIN_TU_SIZE

#define MIN_TU_SIZE 4

Definition at line 46 of file ctu.h.

Referenced by intra_luma_pred_modes(), and set_tb_tab().

◆ MAX_TUS_IN_CU

#define MAX_TUS_IN_CU 64

Definition at line 47 of file ctu.h.

◆ MAX_QP

#define MAX_QP 63

Definition at line 49 of file ctu.h.

◆ MAX_PB_SIZE

#define MAX_PB_SIZE 128

Definition at line 51 of file ctu.h.

◆ MAX_SCALING_RATIO

#define MAX_SCALING_RATIO 8

Definition at line 52 of file ctu.h.

◆ EDGE_EMU_BUFFER_STRIDE

#define EDGE_EMU_BUFFER_STRIDE ((MAX_PB_SIZE + 32) * MAX_SCALING_RATIO)

Definition at line 53 of file ctu.h.

◆ CHROMA_EXTRA_BEFORE

#define CHROMA_EXTRA_BEFORE 1

Definition at line 55 of file ctu.h.

◆ CHROMA_EXTRA_AFTER

#define CHROMA_EXTRA_AFTER 2

Definition at line 56 of file ctu.h.

◆ CHROMA_EXTRA

#define CHROMA_EXTRA 3

Definition at line 57 of file ctu.h.

◆ LUMA_EXTRA_BEFORE

#define LUMA_EXTRA_BEFORE 3

Definition at line 58 of file ctu.h.

◆ LUMA_EXTRA_AFTER

#define LUMA_EXTRA_AFTER 4

Definition at line 59 of file ctu.h.

Referenced by schedule_inter().

◆ LUMA_EXTRA

#define LUMA_EXTRA 7

Definition at line 60 of file ctu.h.

◆ BILINEAR_EXTRA_BEFORE

#define BILINEAR_EXTRA_BEFORE 0

Definition at line 61 of file ctu.h.

Referenced by dmvr_hv().

◆ BILINEAR_EXTRA_AFTER

#define BILINEAR_EXTRA_AFTER 1

Definition at line 62 of file ctu.h.

◆ BILINEAR_EXTRA

#define BILINEAR_EXTRA 1

Definition at line 63 of file ctu.h.

Referenced by dmvr_hv().

◆ SCALED_INT

#define SCALED_INT ( pos )

Value:

((pos) >> 10)

pos

unsigned int pos

Definition spdifenc.c:431

Definition at line 65 of file ctu.h.

Referenced by emulated_edge_scaled(), put_scaled(), and put_uni_w_scaled().

◆ MAX_CONTROL_POINTS

#define MAX_CONTROL_POINTS 3

Definition at line 67 of file ctu.h.

Referenced by affine_mvp(), min_cb_nz_tl_init(), mvds_decode(), mvp_add_difference(), mvp_data(), and store_cp_mv().

◆ AFFINE_MIN_BLOCK_SIZE

#define AFFINE_MIN_BLOCK_SIZE 4

Definition at line 69 of file ctu.h.

Referenced by apply_prof(), apply_prof_uni(), apply_prof_uni_w(), derive_subblock_diff_mvs(), fetch_samples(), luma_prof(), and luma_prof_uni().

◆ MRG_MAX_NUM_CANDS

#define MRG_MAX_NUM_CANDS 6

Definition at line 71 of file ctu.h.

◆ MAX_NUM_HMVP_CANDS

#define MAX_NUM_HMVP_CANDS 5

Definition at line 72 of file ctu.h.

Referenced by update_hmvp().

◆ SAO_PADDING_SIZE

#define SAO_PADDING_SIZE 1

Definition at line 74 of file ctu.h.

◆ ALF_PADDING_SIZE

#define ALF_PADDING_SIZE 8

Definition at line 76 of file ctu.h.

Referenced by ff_vvc_alf_filter(), and pixel_buffer_nz_tl_init().

◆ ALF_BLOCK_SIZE

#define ALF_BLOCK_SIZE 4

Definition at line 77 of file ctu.h.

Referenced by alf_classify(), alf_classify(), alf_filter_chroma(), alf_filter_luma(), alf_get_coeff_and_clip(), check_alf_classify(), FUNC2(), and FUNC2().

◆ ALF_BORDER_LUMA

#define ALF_BORDER_LUMA 3

Definition at line 79 of file ctu.h.

Referenced by alf_copy_ctb_to_hv(), alf_prepare_buffer(), and pixel_buffer_nz_tl_init().

◆ ALF_BORDER_CHROMA

#define ALF_BORDER_CHROMA 2

Definition at line 80 of file ctu.h.

Referenced by alf_copy_ctb_to_hv(), alf_prepare_buffer(), and pixel_buffer_nz_tl_init().

◆ ALF_VB_POS_ABOVE_LUMA

#define ALF_VB_POS_ABOVE_LUMA 4

Definition at line 82 of file ctu.h.

Referenced by check_alf_classify(), check_alf_filter(), and ff_vvc_alf_filter().

◆ ALF_VB_POS_ABOVE_CHROMA

#define ALF_VB_POS_ABOVE_CHROMA 2

Definition at line 83 of file ctu.h.

Referenced by check_alf_filter(), and ff_vvc_alf_filter().

◆ ALF_GRADIENT_STEP

#define ALF_GRADIENT_STEP 2

Definition at line 85 of file ctu.h.

Referenced by alf_classify(), and alf_classify().

◆ ALF_GRADIENT_BORDER

#define ALF_GRADIENT_BORDER 2

Definition at line 86 of file ctu.h.

Referenced by alf_classify(), and alf_classify().

◆ ALF_GRADIENT_SIZE

#define ALF_GRADIENT_SIZE ((MAX_CU_SIZE + ALF_GRADIENT_BORDER * 2) / ALF_GRADIENT_STEP)

Definition at line 87 of file ctu.h.

Referenced by check_alf_classify().

◆ ALF_NUM_DIR

#define ALF_NUM_DIR 4

Definition at line 88 of file ctu.h.

Referenced by alf_classify(), alf_classify(), and check_alf_classify().

◆ ALF_MAX_BLOCKS_IN_CTU

#define ALF_MAX_BLOCKS_IN_CTU (MAX_CTU_SIZE * MAX_CTU_SIZE / ALF_BLOCK_SIZE / ALF_BLOCK_SIZE)

Definition at line 90 of file ctu.h.

Referenced by alf_get_coeff_and_clip().

◆ ALF_MAX_FILTER_SIZE

#define ALF_MAX_FILTER_SIZE (ALF_MAX_BLOCKS_IN_CTU * ALF_NUM_COEFF_LUMA)

Definition at line 91 of file ctu.h.

◆ SAMPLE

#define SAMPLE	(	tab,
		x,
		y )

Value:

((tab)[(y) * s->pps->width + (x)])

s

#define s(width, name)

Definition cbs_vp9.c:198

tab

static const struct twinvq_data tab

Definition twinvq_data.h:10345

Value of the luma sample at position (x, y) in the 2D array tab.

Definition at line 96 of file ctu.h.

◆ SAMPLE_CTB

#define SAMPLE_CTB	(	tab,
		x,
		y )

Value:

((tab)[(y) * min_cb_width + (x)])

Definition at line 97 of file ctu.h.

◆ CTB

#define CTB	(	tab,
		x,
		y )

Value:

((tab)[(y) * fc->ps.pps->ctb_width + (x)])

fc

static const uint16_t fc[]

Definition dcaenc.h:43

Definition at line 98 of file ctu.h.

◆ VVC_CONTEXTS

#define VVC_CONTEXTS 378

Definition at line 364 of file ctu.h.

Referenced by cabac_init_state().

◆ BOUNDARY_LEFT_SLICE

#define BOUNDARY_LEFT_SLICE (1 << 0)

Definition at line 427 of file ctu.h.

◆ BOUNDARY_LEFT_TILE

#define BOUNDARY_LEFT_TILE (1 << 1)

Definition at line 428 of file ctu.h.

◆ BOUNDARY_LEFT_SUBPIC

#define BOUNDARY_LEFT_SUBPIC (1 << 2)

Definition at line 429 of file ctu.h.

Referenced by alf_get_edges(), deblock_is_boundary(), and ff_vvc_decode_neighbour().

◆ BOUNDARY_UPPER_SLICE

#define BOUNDARY_UPPER_SLICE (1 << 3)

Definition at line 430 of file ctu.h.

◆ BOUNDARY_UPPER_TILE

#define BOUNDARY_UPPER_TILE (1 << 4)

Definition at line 431 of file ctu.h.

◆ BOUNDARY_UPPER_SUBPIC

#define BOUNDARY_UPPER_SUBPIC (1 << 5)

Definition at line 432 of file ctu.h.

Referenced by alf_get_edges(), deblock_is_boundary(), and ff_vvc_decode_neighbour().

Enumeration Type Documentation

◆ SAOType

enum SAOType

Enumerator
SAO_NOT_APPLIED
SAO_BAND
SAO_EDGE

Definition at line 100 of file ctu.h.

◆ SAOEOClass

enum SAOEOClass

Enumerator
SAO_EO_HORIZ
SAO_EO_VERT
SAO_EO_135D
SAO_EO_45D

Definition at line 106 of file ctu.h.

◆ IspType

enum IspType

Enumerator
ISP_NO_SPLIT
ISP_HOR_SPLIT
ISP_VER_SPLIT

Definition at line 121 of file ctu.h.

◆ VVCSplitMode

enum VVCSplitMode

Enumerator
SPLIT_NONE
SPLIT_TT_HOR
SPLIT_BT_HOR
SPLIT_TT_VER
SPLIT_BT_VER
SPLIT_QT

Definition at line 127 of file ctu.h.

◆ MtsIdx

enum MtsIdx

Enumerator
MTS_DCT2_DCT2
MTS_DST7_DST7
MTS_DST7_DCT8
MTS_DCT8_DST7
MTS_DCT8_DCT8

Definition at line 136 of file ctu.h.

◆ VVCTreeType

enum VVCTreeType

Enumerator
SINGLE_TREE
DUAL_TREE_LUMA
DUAL_TREE_CHROMA

Definition at line 169 of file ctu.h.

◆ PredMode

enum PredMode

Enumerator
MODE_INTER
MODE_INTRA
MODE_SKIP
MODE_PLT
MODE_IBC

Definition at line 191 of file ctu.h.

◆ MotionModelIdc

enum MotionModelIdc

Enumerator
MOTION_TRANSLATION
MOTION_4_PARAMS_AFFINE
MOTION_6_PARAMS_AFFINE

Definition at line 218 of file ctu.h.

◆ PredFlag

enum PredFlag

Enumerator
PF_INTRA
PF_L0
PF_L1
PF_BI
PF_IBC
PF_PLT

Definition at line 224 of file ctu.h.

◆ IntraPredMode

enum IntraPredMode

Enumerator
INTRA_INVALID
INTRA_PLANAR
INTRA_DC
INTRA_HORZ
INTRA_DIAG
INTRA_VERT
INTRA_VDIAG
INTRA_LT_CCLM
INTRA_L_CCLM
INTRA_T_CCLM

Definition at line 233 of file ctu.h.

Function Documentation

◆ ff_vvc_coding_tree_unit()

int ff_vvc_coding_tree_unit	(	VVCLocalContext *	lc,
		int	ctu_idx,
		int	rs,
		int	rx,
		int	ry )

parse a CTU

Parameters

lc	local context for CTU
ctb_idx	CTB(CTU) address in the current slice
rs	raster order for the CTU.
rx	raster order x for the CTU.
ry	raster order y for the CTU.

Returns: AVERROR

Definition at line 2808 of file ctu.c.

Referenced by run_parse().

◆ ff_vvc_set_neighbour_available()

void ff_vvc_set_neighbour_available	(	VVCLocalContext *	lc,
		int	x0,
		int	y0,
		int	w,
		int	h )

Definition at line 2872 of file ctu.c.

Referenced by ff_vvc_affine_mvp(), ff_vvc_luma_mv_merge_gpm(), ff_vvc_luma_mv_merge_mode(), ff_vvc_mvp(), ff_vvc_sb_mv_merge_mode(), hls_coding_unit(), ibc_merge_candidates(), pred_regular_blk(), and predict_intra().

◆ ff_vvc_decode_neighbour()

void ff_vvc_decode_neighbour	(	VVCLocalContext *	lc,
		int	x_ctb,
		int	y_ctb,
		int	rx,
		int	ry,
		int	rs )

Definition at line 2839 of file ctu.c.

Referenced by ff_vvc_coding_tree_unit(), ff_vvc_deblock_bs(), ff_vvc_reconstruct(), run_alf(), run_deblock_h(), run_deblock_v(), and run_sao().

◆ ff_vvc_ctu_free_cus()

void ff_vvc_ctu_free_cus ( CodingUnit ** cus )

Definition at line 2887 of file ctu.c.

Referenced by ff_vvc_reconstruct(), and free_cus().

◆ ff_vvc_get_qPy()

int ff_vvc_get_qPy	(	const VVCFrameContext *	fc,
		int	xc,
		int	yc )

Definition at line 2906 of file ctu.c.

Referenced by get_qp_y(), and set_qp_c().

◆ ff_vvc_ep_init_stat_coeff()

void ff_vvc_ep_init_stat_coeff	(	EntryPoint *	ep,
		int	bit_depth,
		int	persistent_rice_adaptation_enabled_flag )

Definition at line 2914 of file ctu.c.

Referenced by cabac_init_state(), and ep_init_wpp().

◆ ff_vvc_channel_range()

void ff_vvc_channel_range	(	int *	start,
		int *	end,
		VVCTreeType	tree_type,
		uint8_t	chroma_format_idc )

Definition at line 2923 of file ctu.c.

Referenced by hls_palette_coding(), ibc_fill_vir_buf(), and skipped_transform_tree().

Data Structures

Macros

Enumerations

Functions

Macro Definition Documentation

◆ MAX_CTU_SIZE

◆ MAX_CU_SIZE

◆ MIN_CU_SIZE

◆ MIN_CU_LOG2

◆ MAX_CU_DEPTH

◆ MAX_PALETTE_CU_SIZE

◆ MAX_PARTS_IN_CTU

◆ MIN_PU_SIZE

◆ MAX_TB_SIZE

◆ MIN_TU_SIZE

◆ MAX_TUS_IN_CU

◆ MAX_QP

◆ MAX_PB_SIZE

◆ MAX_SCALING_RATIO

◆ EDGE_EMU_BUFFER_STRIDE

◆ CHROMA_EXTRA_BEFORE

◆ CHROMA_EXTRA_AFTER

◆ CHROMA_EXTRA

◆ LUMA_EXTRA_BEFORE

◆ LUMA_EXTRA_AFTER

◆ LUMA_EXTRA

◆ BILINEAR_EXTRA_BEFORE

◆ BILINEAR_EXTRA_AFTER

◆ BILINEAR_EXTRA

◆ SCALED_INT

◆ MAX_CONTROL_POINTS

◆ AFFINE_MIN_BLOCK_SIZE

◆ MRG_MAX_NUM_CANDS

◆ MAX_NUM_HMVP_CANDS

◆ SAO_PADDING_SIZE

◆ ALF_PADDING_SIZE

◆ ALF_BLOCK_SIZE

◆ ALF_BORDER_LUMA

◆ ALF_BORDER_CHROMA

◆ ALF_VB_POS_ABOVE_LUMA

◆ ALF_VB_POS_ABOVE_CHROMA

◆ ALF_GRADIENT_STEP

◆ ALF_GRADIENT_BORDER

◆ ALF_GRADIENT_SIZE

◆ ALF_NUM_DIR

◆ ALF_MAX_BLOCKS_IN_CTU

◆ ALF_MAX_FILTER_SIZE

◆ SAMPLE

◆ SAMPLE_CTB

◆ CTB

◆ VVC_CONTEXTS

◆ BOUNDARY_LEFT_SLICE

◆ BOUNDARY_LEFT_TILE

◆ BOUNDARY_LEFT_SUBPIC

◆ BOUNDARY_UPPER_SLICE

◆ BOUNDARY_UPPER_TILE

◆ BOUNDARY_UPPER_SUBPIC

Enumeration Type Documentation

◆ SAOType

◆ SAOEOClass

◆ IspType

◆ VVCSplitMode

◆ MtsIdx

◆ VVCTreeType

◆ PredMode

◆ MotionModelIdc

◆ PredFlag

◆ IntraPredMode

Function Documentation

◆ ff_vvc_coding_tree_unit()

◆ ff_vvc_set_neighbour_available()

◆ ff_vvc_decode_neighbour()

◆ ff_vvc_ctu_free_cus()

◆ ff_vvc_get_qPy()

◆ ff_vvc_ep_init_stat_coeff()

◆ ff_vvc_channel_range()