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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved.
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#ifndef AOM_AV1_COMMON_ENUMS_H_
#define AOM_AV1_COMMON_ENUMS_H_
#include "config/aom_config.h"
#include "aom/aom_codec.h"
#include "aom/aom_integer.h"
#include "aom_dsp/txfm_common.h"
#include "aom_ports/mem.h"
#ifdef __cplusplus
extern "C" {
#endif
/*! @file */
/*!\cond */
// Max superblock size
#define MAX_SB_SIZE_LOG2 7
#define MAX_SB_SIZE (1 << MAX_SB_SIZE_LOG2)
#define MAX_SB_SQUARE (MAX_SB_SIZE * MAX_SB_SIZE)
// Min superblock size
#define MIN_SB_SIZE_LOG2 6
// Pixels per Mode Info (MI) unit
#define MI_SIZE_LOG2 2
#define MI_SIZE (1 << MI_SIZE_LOG2)
// MI-units per max superblock (MI Block - MIB)
#define MAX_MIB_SIZE_LOG2 (MAX_SB_SIZE_LOG2 - MI_SIZE_LOG2)
#define MAX_MIB_SIZE (1 << MAX_MIB_SIZE_LOG2)
// MI-units per min superblock
#define MIN_MIB_SIZE_LOG2 (MIN_SB_SIZE_LOG2 - MI_SIZE_LOG2)
// Mask to extract MI offset within max MIB
#define MAX_MIB_MASK (MAX_MIB_SIZE - 1)
// Maximum number of tile rows and tile columns
#define MAX_TILE_ROWS 64
#define MAX_TILE_COLS 64
#define MAX_VARTX_DEPTH 2
#define MI_SIZE_64X64 (64 >> MI_SIZE_LOG2)
#define MI_SIZE_128X128 (128 >> MI_SIZE_LOG2)
#define MAX_PALETTE_SQUARE (64 * 64)
// Maximum number of colors in a palette.
#define PALETTE_MAX_SIZE 8
// Minimum number of colors in a palette.
#define PALETTE_MIN_SIZE 2
#define FRAME_OFFSET_BITS 5
#define MAX_FRAME_DISTANCE ((1 << FRAME_OFFSET_BITS) - 1)
// 4 frame filter levels: y plane vertical, y plane horizontal,
// u plane, and v plane
#define FRAME_LF_COUNT 4
#define DEFAULT_DELTA_LF_MULTI 0
#define MAX_MODE_LF_DELTAS 2
#define DIST_PRECISION_BITS 4
#define DIST_PRECISION (1 << DIST_PRECISION_BITS) // 16
#define PROFILE_BITS 3
// The following three profiles are currently defined.
// Profile 0. 8-bit and 10-bit 4:2:0 and 4:0:0 only.
// Profile 1. 8-bit and 10-bit 4:4:4
// Profile 2. 8-bit and 10-bit 4:2:2
// 12-bit 4:0:0, 4:2:2 and 4:4:4
// Since we have three bits for the profiles, it can be extended later.
enum {
PROFILE_0,
PROFILE_1,
PROFILE_2,
MAX_PROFILES,
} SENUM1BYTE(BITSTREAM_PROFILE);
#define OP_POINTS_CNT_MINUS_1_BITS 5
#define OP_POINTS_IDC_BITS 12
// Note: Some enums use the attribute 'packed' to use smallest possible integer
// type, so that we can save memory when they are used in structs/arrays.
typedef enum ATTRIBUTE_PACKED {
BLOCK_4X4,
BLOCK_4X8,
BLOCK_8X4,
BLOCK_8X8,
BLOCK_8X16,
BLOCK_16X8,
BLOCK_16X16,
BLOCK_16X32,
BLOCK_32X16,
BLOCK_32X32,
BLOCK_32X64,
BLOCK_64X32,
BLOCK_64X64,
BLOCK_64X128,
BLOCK_128X64,
BLOCK_128X128,
BLOCK_4X16,
BLOCK_16X4,
BLOCK_8X32,
BLOCK_32X8,
BLOCK_16X64,
BLOCK_64X16,
BLOCK_SIZES_ALL,
BLOCK_SIZES = BLOCK_4X16,
BLOCK_INVALID = 255,
BLOCK_LARGEST = (BLOCK_SIZES - 1)
} BLOCK_SIZE;
// 4X4, 8X8, 16X16, 32X32, 64X64, 128X128
#define SQR_BLOCK_SIZES 6
// Partition types. R: Recursive
//
// NONE HORZ VERT SPLIT
// +-------+ +-------+ +---+---+ +---+---+
// | | | | | | | | R | R |
// | | +-------+ | | | +---+---+
// | | | | | | | | R | R |
// +-------+ +-------+ +---+---+ +---+---+
//
// HORZ_A HORZ_B VERT_A VERT_B
// +---+---+ +-------+ +---+---+ +---+---+
// | | | | | | | | | | |
// +---+---+ +---+---+ +---+ | | +---+
// | | | | | | | | | | |
// +-------+ +---+---+ +---+---+ +---+---+
//
// HORZ_4 VERT_4
// +-----+ +-+-+-+
// +-----+ | | | |
// +-----+ | | | |
// +-----+ +-+-+-+
enum {
PARTITION_NONE,
PARTITION_HORZ,
PARTITION_VERT,
PARTITION_SPLIT,
PARTITION_HORZ_A, // HORZ split and the top partition is split again
PARTITION_HORZ_B, // HORZ split and the bottom partition is split again
PARTITION_VERT_A, // VERT split and the left partition is split again
PARTITION_VERT_B, // VERT split and the right partition is split again
PARTITION_HORZ_4, // 4:1 horizontal partition
PARTITION_VERT_4, // 4:1 vertical partition
EXT_PARTITION_TYPES,
PARTITION_TYPES = PARTITION_SPLIT + 1,
PARTITION_INVALID = 255
} UENUM1BYTE(PARTITION_TYPE);
typedef char PARTITION_CONTEXT;
#define PARTITION_PLOFFSET 4 // number of probability models per block size
#define PARTITION_BLOCK_SIZES 5
#define PARTITION_CONTEXTS (PARTITION_BLOCK_SIZES * PARTITION_PLOFFSET)
#define TX_SIZE_LUMA_MIN (TX_4X4)
/* We don't need to code a transform size unless the allowed size is at least
one more than the minimum. */
#define TX_SIZE_CTX_MIN (TX_SIZE_LUMA_MIN + 1)
// Maximum tx_size categories
#define MAX_TX_CATS (TX_SIZES - TX_SIZE_CTX_MIN)
#define MAX_TX_DEPTH 2
#define MAX_TX_SIZE_LOG2 (6)
#define MAX_TX_SIZE (1 << MAX_TX_SIZE_LOG2)
#define MIN_TX_SIZE_LOG2 2
#define MIN_TX_SIZE (1 << MIN_TX_SIZE_LOG2)
#define MAX_TX_SQUARE (MAX_TX_SIZE * MAX_TX_SIZE)
// Pad 4 extra columns to remove horizontal availability check.
#define TX_PAD_HOR_LOG2 2
#define TX_PAD_HOR 4
// Pad 6 extra rows (2 on top and 4 on bottom) to remove vertical availability
// check.
#define TX_PAD_TOP 0
#define TX_PAD_BOTTOM 4
#define TX_PAD_VER (TX_PAD_TOP + TX_PAD_BOTTOM)
// Pad 16 extra bytes to avoid reading overflow in SIMD optimization.
#define TX_PAD_END 16
#define TX_PAD_2D ((32 + TX_PAD_HOR) * (32 + TX_PAD_VER) + TX_PAD_END)
// Number of maximum size transform blocks in the maximum size superblock
#define MAX_TX_BLOCKS_IN_MAX_SB_LOG2 ((MAX_SB_SIZE_LOG2 - MAX_TX_SIZE_LOG2) * 2)
#define MAX_TX_BLOCKS_IN_MAX_SB (1 << MAX_TX_BLOCKS_IN_MAX_SB_LOG2)
// frame transform mode
enum {
ONLY_4X4, // use only 4x4 transform
TX_MODE_LARGEST, // transform size is the largest possible for pu size
TX_MODE_SELECT, // transform specified for each block
TX_MODES,
} UENUM1BYTE(TX_MODE);
// 1D tx types
enum {
DCT_1D,
ADST_1D,
FLIPADST_1D,
IDTX_1D,
TX_TYPES_1D,
} UENUM1BYTE(TX_TYPE_1D);
enum {
REG_REG,
REG_SMOOTH,
REG_SHARP,
SMOOTH_REG,
SMOOTH_SMOOTH,
SMOOTH_SHARP,
SHARP_REG,
SHARP_SMOOTH,
SHARP_SHARP,
} UENUM1BYTE(DUAL_FILTER_TYPE);
#define EXT_TX_SIZES 4 // number of sizes that use extended transforms
#define EXT_TX_SETS_INTER 4 // Sets of transform selections for INTER
#define EXT_TX_SETS_INTRA 3 // Sets of transform selections for INTRA
enum {
AOM_LAST_FLAG = 1 << 0,
AOM_LAST2_FLAG = 1 << 1,
AOM_LAST3_FLAG = 1 << 2,
AOM_GOLD_FLAG = 1 << 3,
AOM_BWD_FLAG = 1 << 4,
AOM_ALT2_FLAG = 1 << 5,
AOM_ALT_FLAG = 1 << 6,
AOM_REFFRAME_ALL = (1 << 7) - 1
} UENUM1BYTE(AOM_REFFRAME);
enum {
UNIDIR_COMP_REFERENCE,
BIDIR_COMP_REFERENCE,
COMP_REFERENCE_TYPES,
} UENUM1BYTE(COMP_REFERENCE_TYPE);
enum { PLANE_TYPE_Y, PLANE_TYPE_UV, PLANE_TYPES } UENUM1BYTE(PLANE_TYPE);
#define CFL_ALPHABET_SIZE_LOG2 4
#define CFL_ALPHABET_SIZE (1 << CFL_ALPHABET_SIZE_LOG2)
#define CFL_MAGS_SIZE ((2 << CFL_ALPHABET_SIZE_LOG2) + 1)
#define CFL_INDEX_ZERO CFL_ALPHABET_SIZE
#define CFL_IDX_U(idx) (idx >> CFL_ALPHABET_SIZE_LOG2)
#define CFL_IDX_V(idx) (idx & (CFL_ALPHABET_SIZE - 1))
enum { CFL_PRED_U, CFL_PRED_V, CFL_PRED_PLANES } UENUM1BYTE(CFL_PRED_TYPE);
enum {
CFL_SIGN_ZERO,
CFL_SIGN_NEG,
CFL_SIGN_POS,
CFL_SIGNS
} UENUM1BYTE(CFL_SIGN_TYPE);
enum {
CFL_DISALLOWED,
CFL_ALLOWED,
CFL_ALLOWED_TYPES
} UENUM1BYTE(CFL_ALLOWED_TYPE);
// CFL_SIGN_ZERO,CFL_SIGN_ZERO is invalid
#define CFL_JOINT_SIGNS (CFL_SIGNS * CFL_SIGNS - 1)
// CFL_SIGN_U is equivalent to (js + 1) / 3 for js in 0 to 8
#define CFL_SIGN_U(js) (((js + 1) * 11) >> 5)
// CFL_SIGN_V is equivalent to (js + 1) % 3 for js in 0 to 8
#define CFL_SIGN_V(js) ((js + 1) - CFL_SIGNS * CFL_SIGN_U(js))
// There is no context when the alpha for a given plane is zero.
// So there are 2 fewer contexts than joint signs.
#define CFL_ALPHA_CONTEXTS (CFL_JOINT_SIGNS + 1 - CFL_SIGNS)
#define CFL_CONTEXT_U(js) (js + 1 - CFL_SIGNS)
// Also, the contexts are symmetric under swapping the planes.
#define CFL_CONTEXT_V(js) \
(CFL_SIGN_V(js) * CFL_SIGNS + CFL_SIGN_U(js) - CFL_SIGNS)
enum {
PALETTE_MAP,
COLOR_MAP_TYPES,
} UENUM1BYTE(COLOR_MAP_TYPE);
enum {
TWO_COLORS,
THREE_COLORS,
FOUR_COLORS,
FIVE_COLORS,
SIX_COLORS,
SEVEN_COLORS,
EIGHT_COLORS,
PALETTE_SIZES
} UENUM1BYTE(PALETTE_SIZE);
enum {
PALETTE_COLOR_ONE,
PALETTE_COLOR_TWO,
PALETTE_COLOR_THREE,
PALETTE_COLOR_FOUR,
PALETTE_COLOR_FIVE,
PALETTE_COLOR_SIX,
PALETTE_COLOR_SEVEN,
PALETTE_COLOR_EIGHT,
PALETTE_COLORS
} UENUM1BYTE(PALETTE_COLOR);
// Note: All directional predictors must be between V_PRED and D67_PRED (both
// inclusive).
enum {
DC_PRED, // Average of above and left pixels
V_PRED, // Vertical
H_PRED, // Horizontal
D45_PRED, // Directional 45 degree
D135_PRED, // Directional 135 degree
D113_PRED, // Directional 113 degree
D157_PRED, // Directional 157 degree
D203_PRED, // Directional 203 degree
D67_PRED, // Directional 67 degree
SMOOTH_PRED, // Combination of horizontal and vertical interpolation
SMOOTH_V_PRED, // Vertical interpolation
SMOOTH_H_PRED, // Horizontal interpolation
PAETH_PRED, // Predict from the direction of smallest gradient
NEARESTMV,
NEARMV,
GLOBALMV,
NEWMV,
// Compound ref compound modes
NEAREST_NEARESTMV,
NEAR_NEARMV,
NEAREST_NEWMV,
NEW_NEARESTMV,
NEAR_NEWMV,
NEW_NEARMV,
GLOBAL_GLOBALMV,
NEW_NEWMV,
MB_MODE_COUNT,
PRED_MODE_INVALID = MB_MODE_COUNT,
INTRA_MODE_START = DC_PRED,
INTRA_MODE_END = NEARESTMV,
DIR_MODE_START = V_PRED,
DIR_MODE_END = D67_PRED + 1,
INTRA_MODE_NUM = INTRA_MODE_END - INTRA_MODE_START,
SINGLE_INTER_MODE_START = NEARESTMV,
SINGLE_INTER_MODE_END = NEAREST_NEARESTMV,
SINGLE_INTER_MODE_NUM = SINGLE_INTER_MODE_END - SINGLE_INTER_MODE_START,
COMP_INTER_MODE_START = NEAREST_NEARESTMV,
COMP_INTER_MODE_END = MB_MODE_COUNT,
COMP_INTER_MODE_NUM = COMP_INTER_MODE_END - COMP_INTER_MODE_START,
INTER_MODE_START = NEARESTMV,
INTER_MODE_END = MB_MODE_COUNT,
INTRA_MODES = PAETH_PRED + 1, // PAETH_PRED has to be the last intra mode.
INTRA_INVALID = MB_MODE_COUNT // For uv_mode in inter blocks
} UENUM1BYTE(PREDICTION_MODE);
// TODO(ltrudeau) Do we really want to pack this?
// TODO(ltrudeau) Do we match with PREDICTION_MODE?
enum {
UV_DC_PRED, // Average of above and left pixels
UV_V_PRED, // Vertical
UV_H_PRED, // Horizontal
UV_D45_PRED, // Directional 45 degree
UV_D135_PRED, // Directional 135 degree
UV_D113_PRED, // Directional 113 degree
UV_D157_PRED, // Directional 157 degree
UV_D203_PRED, // Directional 203 degree
UV_D67_PRED, // Directional 67 degree
UV_SMOOTH_PRED, // Combination of horizontal and vertical interpolation
UV_SMOOTH_V_PRED, // Vertical interpolation
UV_SMOOTH_H_PRED, // Horizontal interpolation
UV_PAETH_PRED, // Predict from the direction of smallest gradient
UV_CFL_PRED, // Chroma-from-Luma
UV_INTRA_MODES,
UV_MODE_INVALID, // For uv_mode in inter blocks
} UENUM1BYTE(UV_PREDICTION_MODE);
// Number of top model rd to store for pruning y modes in intra mode decision
#define TOP_INTRA_MODEL_COUNT 4
// Total number of luma intra prediction modes (include both directional and
// non-directional modes)
// Because there are 8 directional modes, each has additional 6 delta angles.
#define LUMA_MODE_COUNT (PAETH_PRED - DC_PRED + 1 + 6 * 8)
enum {
SIMPLE_TRANSLATION,
OBMC_CAUSAL, // 2-sided OBMC
WARPED_CAUSAL, // 2-sided WARPED
MOTION_MODES
} UENUM1BYTE(MOTION_MODE);
enum {
II_DC_PRED,
II_V_PRED,
II_H_PRED,
II_SMOOTH_PRED,
INTERINTRA_MODES
} UENUM1BYTE(INTERINTRA_MODE);
enum {
COMPOUND_AVERAGE,
COMPOUND_DISTWTD,
COMPOUND_WEDGE,
COMPOUND_DIFFWTD,
COMPOUND_TYPES,
MASKED_COMPOUND_TYPES = 2,
} UENUM1BYTE(COMPOUND_TYPE);
enum {
FILTER_DC_PRED,
FILTER_V_PRED,
FILTER_H_PRED,
FILTER_D157_PRED,
FILTER_PAETH_PRED,
FILTER_INTRA_MODES,
} UENUM1BYTE(FILTER_INTRA_MODE);
enum {
SEQ_LEVEL_2_0,
SEQ_LEVEL_2_1,
SEQ_LEVEL_2_2,
SEQ_LEVEL_2_3,
SEQ_LEVEL_3_0,
SEQ_LEVEL_3_1,
SEQ_LEVEL_3_2,
SEQ_LEVEL_3_3,
SEQ_LEVEL_4_0,
SEQ_LEVEL_4_1,
SEQ_LEVEL_4_2,
SEQ_LEVEL_4_3,
SEQ_LEVEL_5_0,
SEQ_LEVEL_5_1,
SEQ_LEVEL_5_2,
SEQ_LEVEL_5_3,
SEQ_LEVEL_6_0,
SEQ_LEVEL_6_1,
SEQ_LEVEL_6_2,
SEQ_LEVEL_6_3,
SEQ_LEVEL_7_0,
SEQ_LEVEL_7_1,
SEQ_LEVEL_7_2,
SEQ_LEVEL_7_3,
SEQ_LEVEL_8_0,
SEQ_LEVEL_8_1,
SEQ_LEVEL_8_2,
SEQ_LEVEL_8_3,
SEQ_LEVELS,
SEQ_LEVEL_MAX = 31,
SEQ_LEVEL_KEEP_STATS = 32,
} UENUM1BYTE(AV1_LEVEL);
#define LEVEL_BITS 5
#define DIRECTIONAL_MODES 8
#define MAX_ANGLE_DELTA 3
#define ANGLE_STEP 3
#define INTER_MODES (1 + NEWMV - NEARESTMV)
#define INTER_COMPOUND_MODES (1 + NEW_NEWMV - NEAREST_NEARESTMV)
#define SKIP_CONTEXTS 3
#define SKIP_MODE_CONTEXTS 3
#define COMP_INDEX_CONTEXTS 6
#define COMP_GROUP_IDX_CONTEXTS 6
#define NMV_CONTEXTS 3
#define NEWMV_MODE_CONTEXTS 6
#define GLOBALMV_MODE_CONTEXTS 2
#define REFMV_MODE_CONTEXTS 6
#define DRL_MODE_CONTEXTS 3
#define GLOBALMV_OFFSET 3
#define REFMV_OFFSET 4
#define NEWMV_CTX_MASK ((1 << GLOBALMV_OFFSET) - 1)
#define GLOBALMV_CTX_MASK ((1 << (REFMV_OFFSET - GLOBALMV_OFFSET)) - 1)
#define REFMV_CTX_MASK ((1 << (8 - REFMV_OFFSET)) - 1)
#define COMP_NEWMV_CTXS 5
#define INTER_MODE_CONTEXTS 8
#define DELTA_Q_SMALL 3
#define DELTA_Q_PROBS (DELTA_Q_SMALL)
#define DEFAULT_DELTA_Q_RES_PERCEPTUAL 4
#define DEFAULT_DELTA_Q_RES_OBJECTIVE 4
#define DEFAULT_DELTA_Q_RES_DUCKY_ENCODE 4
#define DELTA_LF_SMALL 3
#define DELTA_LF_PROBS (DELTA_LF_SMALL)
#define DEFAULT_DELTA_LF_RES 2
/* Segment Feature Masks */
#define MAX_MV_REF_CANDIDATES 2
#define MAX_REF_MV_STACK_SIZE 8
#define USABLE_REF_MV_STACK_SIZE 4
#define REF_CAT_LEVEL 640
#define INTRA_INTER_CONTEXTS 4
#define COMP_INTER_CONTEXTS 5
#define REF_CONTEXTS 3
#define COMP_REF_TYPE_CONTEXTS 5
#define UNI_COMP_REF_CONTEXTS 3
#define TXFM_PARTITION_CONTEXTS ((TX_SIZES - TX_8X8) * 6 - 3)
typedef uint8_t TXFM_CONTEXT;
// An enum for single reference types (and some derived values).
enum {
NONE_FRAME = -1,
INTRA_FRAME,
LAST_FRAME,
LAST2_FRAME,
LAST3_FRAME,
GOLDEN_FRAME,
BWDREF_FRAME,
ALTREF2_FRAME,
ALTREF_FRAME,
REF_FRAMES,
// Extra/scratch reference frame. It may be:
// - used to update the ALTREF2_FRAME ref (see lshift_bwd_ref_frames()), or
// - updated from ALTREF2_FRAME ref (see rshift_bwd_ref_frames()).
EXTREF_FRAME = REF_FRAMES,
// Number of inter (non-intra) reference types.
INTER_REFS_PER_FRAME = ALTREF_FRAME - LAST_FRAME + 1,
// Number of forward (aka past) reference types.
FWD_REFS = GOLDEN_FRAME - LAST_FRAME + 1,
// Number of backward (aka future) reference types.
BWD_REFS = ALTREF_FRAME - BWDREF_FRAME + 1,
SINGLE_REFS = FWD_REFS + BWD_REFS,
};
#define REF_FRAMES_LOG2 3
// REF_FRAMES for the cm->ref_frame_map array, 1 scratch frame for the new
// frame in cm->cur_frame, INTER_REFS_PER_FRAME for scaled references on the
// encoder in the cpi->scaled_ref_buf array.
// The encoder uses FRAME_BUFFERS only in GOOD and REALTIME encoding modes.
// The decoder also uses FRAME_BUFFERS.
#define FRAME_BUFFERS (REF_FRAMES + 1 + INTER_REFS_PER_FRAME)
// During allintra encoding, one reference frame buffer is free to be used again
// only after another frame buffer is stored as the reference frame. Hence, it
// is necessary and sufficient to maintain only two reference frame buffers in
// this case.
#define FRAME_BUFFERS_ALLINTRA 2
#define FWD_RF_OFFSET(ref) (ref - LAST_FRAME)
#define BWD_RF_OFFSET(ref) (ref - BWDREF_FRAME)
// Select all the decoded frame buffer slots
#define SELECT_ALL_BUF_SLOTS 0xFF
enum {
LAST_LAST2_FRAMES, // { LAST_FRAME, LAST2_FRAME }
LAST_LAST3_FRAMES, // { LAST_FRAME, LAST3_FRAME }
LAST_GOLDEN_FRAMES, // { LAST_FRAME, GOLDEN_FRAME }
BWDREF_ALTREF_FRAMES, // { BWDREF_FRAME, ALTREF_FRAME }
LAST2_LAST3_FRAMES, // { LAST2_FRAME, LAST3_FRAME }
LAST2_GOLDEN_FRAMES, // { LAST2_FRAME, GOLDEN_FRAME }
LAST3_GOLDEN_FRAMES, // { LAST3_FRAME, GOLDEN_FRAME }
BWDREF_ALTREF2_FRAMES, // { BWDREF_FRAME, ALTREF2_FRAME }
ALTREF2_ALTREF_FRAMES, // { ALTREF2_FRAME, ALTREF_FRAME }
TOTAL_UNIDIR_COMP_REFS,
// NOTE: UNIDIR_COMP_REFS is the number of uni-directional reference pairs
// that are explicitly signaled.
UNIDIR_COMP_REFS = BWDREF_ALTREF_FRAMES + 1,
} UENUM1BYTE(UNIDIR_COMP_REF);
#define TOTAL_COMP_REFS (FWD_REFS * BWD_REFS + TOTAL_UNIDIR_COMP_REFS)
#define COMP_REFS (FWD_REFS * BWD_REFS + UNIDIR_COMP_REFS)
// NOTE: A limited number of unidirectional reference pairs can be signalled for
// compound prediction. The use of skip mode, on the other hand, makes it
// possible to have a reference pair not listed for explicit signaling.
#define MODE_CTX_REF_FRAMES (REF_FRAMES + TOTAL_COMP_REFS)
// Note: It includes single and compound references. So, it can take values from
// NONE_FRAME to (MODE_CTX_REF_FRAMES - 1). Hence, it is not defined as an enum.
typedef int8_t MV_REFERENCE_FRAME;
/*!\endcond */
/*!\enum RestorationType
* \brief This enumeration defines various restoration types supported
*/
typedef enum {
RESTORE_NONE, /**< No restoration */
RESTORE_WIENER, /**< Separable Wiener restoration */
RESTORE_SGRPROJ, /**< Selfguided restoration */
RESTORE_SWITCHABLE, /**< Switchable restoration */
RESTORE_SWITCHABLE_TYPES = RESTORE_SWITCHABLE, /**< Num Switchable types */
RESTORE_TYPES = 4, /**< Num Restore types */
} RestorationType;
/*!\cond */
// Picture prediction structures (0-13 are predefined) in scalability metadata.
enum {
SCALABILITY_L1T2 = 0,
SCALABILITY_L1T3 = 1,
SCALABILITY_L2T1 = 2,
SCALABILITY_L2T2 = 3,
SCALABILITY_L2T3 = 4,
SCALABILITY_S2T1 = 5,
SCALABILITY_S2T2 = 6,
SCALABILITY_S2T3 = 7,
SCALABILITY_L2T1h = 8,
SCALABILITY_L2T2h = 9,
SCALABILITY_L2T3h = 10,
SCALABILITY_S2T1h = 11,
SCALABILITY_S2T2h = 12,
SCALABILITY_S2T3h = 13,
SCALABILITY_SS = 14
} UENUM1BYTE(SCALABILITY_STRUCTURES);
#define SUPERRES_SCALE_BITS 3
#define SUPERRES_SCALE_DENOMINATOR_MIN (SCALE_NUMERATOR + 1)
// In large_scale_tile coding, external references are used.
#define MAX_EXTERNAL_REFERENCES 128
#define MAX_TILES 512
/*!\endcond */
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AV1_COMMON_ENUMS_H_