/*
 * Copyright © 2018-2021, VideoLAN and dav1d authors
 * Copyright © 2018, Two Orioles, LLC
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"

#include <stdint.h>

#include "common/attributes.h"

#include "src/levels.h"
#include "src/tables.h"

const uint8_t dav1d_al_part_ctx[2][N_BL_LEVELS][N_PARTITIONS] = {
    {
        // partitions:
        // none,  h,    v, split,  tts,  tbs,  tls,  trs,   h4,   v4
        { 0x00, 0x00, 0x10,   -1, 0x00, 0x10, 0x10, 0x10,   -1,   -1 }, // bl128
        { 0x10, 0x10, 0x18,   -1, 0x10, 0x18, 0x18, 0x18, 0x10, 0x1c }, // bl64
        { 0x18, 0x18, 0x1c,   -1, 0x18, 0x1c, 0x1c, 0x1c, 0x18, 0x1e }, // bl32
        { 0x1c, 0x1c, 0x1e,   -1, 0x1c, 0x1e, 0x1e, 0x1e, 0x1c, 0x1f }, // bl16
        { 0x1e, 0x1e, 0x1f, 0x1f,   -1,   -1,   -1,   -1,   -1,   -1 }, // bl8
    }, {
        { 0x00, 0x10, 0x00,   -1, 0x10, 0x10, 0x00, 0x10,   -1,   -1 }, // bl128
        { 0x10, 0x18, 0x10,   -1, 0x18, 0x18, 0x10, 0x18, 0x1c, 0x10 }, // bl64
        { 0x18, 0x1c, 0x18,   -1, 0x1c, 0x1c, 0x18, 0x1c, 0x1e, 0x18 }, // bl32
        { 0x1c, 0x1e, 0x1c,   -1, 0x1e, 0x1e, 0x1c, 0x1e, 0x1f, 0x1c }, // bl16
        { 0x1e, 0x1f, 0x1e, 0x1f,   -1,   -1,   -1,   -1,   -1,   -1 }, // bl8
    }
};

const uint8_t /* enum BlockSize */
    dav1d_block_sizes[N_BL_LEVELS][N_PARTITIONS][2] =
{
    [BL_128X128] = {
        [PARTITION_NONE]           = { BS_128x128 },
        [PARTITION_H]              = { BS_128x64 },
        [PARTITION_V]              = { BS_64x128 },
        [PARTITION_T_TOP_SPLIT]    = { BS_64x64, BS_128x64 },
        [PARTITION_T_BOTTOM_SPLIT] = { BS_128x64, BS_64x64 },
        [PARTITION_T_LEFT_SPLIT]   = { BS_64x64, BS_64x128 },
        [PARTITION_T_RIGHT_SPLIT]  = { BS_64x128, BS_64x64 },
    }, [BL_64X64] = {
        [PARTITION_NONE]           = { BS_64x64 },
        [PARTITION_H]              = { BS_64x32 },
        [PARTITION_V]              = { BS_32x64 },
        [PARTITION_T_TOP_SPLIT]    = { BS_32x32, BS_64x32 },
        [PARTITION_T_BOTTOM_SPLIT] = { BS_64x32, BS_32x32 },
        [PARTITION_T_LEFT_SPLIT]   = { BS_32x32, BS_32x64 },
        [PARTITION_T_RIGHT_SPLIT]  = { BS_32x64, BS_32x32 },
        [PARTITION_H4]             = { BS_64x16 },
        [PARTITION_V4]             = { BS_16x64 },
    }, [BL_32X32] = {
        [PARTITION_NONE]           = { BS_32x32 },
        [PARTITION_H]              = { BS_32x16 },
        [PARTITION_V]              = { BS_16x32 },
        [PARTITION_T_TOP_SPLIT]    = { BS_16x16, BS_32x16 },
        [PARTITION_T_BOTTOM_SPLIT] = { BS_32x16, BS_16x16 },
        [PARTITION_T_LEFT_SPLIT]   = { BS_16x16, BS_16x32 },
        [PARTITION_T_RIGHT_SPLIT]  = { BS_16x32, BS_16x16 },
        [PARTITION_H4]             = { BS_32x8  },
        [PARTITION_V4]             = { BS_8x32  },
    }, [BL_16X16] = {
        [PARTITION_NONE]           = { BS_16x16 },
        [PARTITION_H]              = { BS_16x8  },
        [PARTITION_V]              = { BS_8x16  },
        [PARTITION_T_TOP_SPLIT]    = { BS_8x8,   BS_16x8  },
        [PARTITION_T_BOTTOM_SPLIT] = { BS_16x8,  BS_8x8   },
        [PARTITION_T_LEFT_SPLIT]   = { BS_8x8,   BS_8x16  },
        [PARTITION_T_RIGHT_SPLIT]  = { BS_8x16,  BS_8x8   },
        [PARTITION_H4]             = { BS_16x4  },
        [PARTITION_V4]             = { BS_4x16  },
    }, [BL_8X8] = {
        [PARTITION_NONE]           = { BS_8x8   },
        [PARTITION_H]              = { BS_8x4   },
        [PARTITION_V]              = { BS_4x8   },
        [PARTITION_SPLIT]          = { BS_4x4   },
    }
};

const uint8_t dav1d_block_dimensions[N_BS_SIZES][4] = {
    [BS_128x128] = { 32, 32, 5, 5 },
    [BS_128x64]  = { 32, 16, 5, 4 },
    [BS_64x128]  = { 16, 32, 4, 5 },
    [BS_64x64]   = { 16, 16, 4, 4 },
    [BS_64x32]   = { 16,  8, 4, 3 },
    [BS_64x16]   = { 16,  4, 4, 2 },
    [BS_32x64]   = {  8, 16, 3, 4 },
    [BS_32x32]   = {  8,  8, 3, 3 },
    [BS_32x16]   = {  8,  4, 3, 2 },
    [BS_32x8]    = {  8,  2, 3, 1 },
    [BS_16x64]   = {  4, 16, 2, 4 },
    [BS_16x32]   = {  4,  8, 2, 3 },
    [BS_16x16]   = {  4,  4, 2, 2 },
    [BS_16x8]    = {  4,  2, 2, 1 },
    [BS_16x4]    = {  4,  1, 2, 0 },
    [BS_8x32]    = {  2,  8, 1, 3 },
    [BS_8x16]    = {  2,  4, 1, 2 },
    [BS_8x8]     = {  2,  2, 1, 1 },
    [BS_8x4]     = {  2,  1, 1, 0 },
    [BS_4x16]    = {  1,  4, 0, 2 },
    [BS_4x8]     = {  1,  2, 0, 1 },
    [BS_4x4]     = {  1,  1, 0, 0 },
};

const TxfmInfo dav1d_txfm_dimensions[N_RECT_TX_SIZES] = {
    [ TX_4X4]   = { .w = 1, .h = 1, .lw = 0, .lh = 0,
                    .min = 0, .max = 0, .ctx = 0 },
    [ TX_8X8]   = { .w = 2, .h = 2, .lw = 1, .lh = 1,
                    .min = 1, .max = 1, .sub = TX_4X4, .ctx = 1 },
    [ TX_16X16] = { .w = 4, .h = 4, .lw = 2, .lh = 2,
                    .min = 2, .max = 2, .sub = TX_8X8, .ctx = 2 },
    [ TX_32X32] = { .w = 8, .h = 8, .lw = 3, .lh = 3,
                    .min = 3, .max = 3, .sub = TX_16X16, .ctx = 3 },
    [ TX_64X64] = { .w = 16, .h = 16, .lw = 4, .lh = 4,
                    .min = 4, .max = 4, .sub = TX_32X32, .ctx = 4 },
    [RTX_4X8]   = { .w = 1, .h = 2, .lw = 0, .lh = 1,
                    .min = 0, .max = 1, .sub = TX_4X4, .ctx = 1 },
    [RTX_8X4]   = { .w = 2, .h = 1, .lw = 1, .lh = 0,
                    .min = 0, .max = 1, .sub = TX_4X4, .ctx = 1 },
    [RTX_8X16]  = { .w = 2, .h = 4, .lw = 1, .lh = 2,
                    .min = 1, .max = 2, .sub = TX_8X8, .ctx = 2 },
    [RTX_16X8]  = { .w = 4, .h = 2, .lw = 2, .lh = 1,
                    .min = 1, .max = 2, .sub = TX_8X8, .ctx = 2 },
    [RTX_16X32] = { .w = 4, .h = 8, .lw = 2, .lh = 3,
                    .min = 2, .max = 3, .sub = TX_16X16, .ctx = 3 },
    [RTX_32X16] = { .w = 8, .h = 4, .lw = 3, .lh = 2,
                    .min = 2, .max = 3, .sub = TX_16X16, .ctx = 3 },
    [RTX_32X64] = { .w = 8, .h = 16, .lw = 3, .lh = 4,
                    .min = 3, .max = 4, .sub = TX_32X32, .ctx = 4 },
    [RTX_64X32] = { .w = 16, .h = 8, .lw = 4, .lh = 3,
                    .min = 3, .max = 4, .sub = TX_32X32, .ctx = 4 },
    [RTX_4X16]  = { .w = 1, .h = 4, .lw = 0, .lh = 2,
                    .min = 0, .max = 2, .sub = RTX_4X8, .ctx = 1 },
    [RTX_16X4]  = { .w = 4, .h = 1, .lw = 2, .lh = 0,
                    .min = 0, .max = 2, .sub = RTX_8X4, .ctx = 1 },
    [RTX_8X32]  = { .w = 2, .h = 8, .lw = 1, .lh = 3,
                    .min = 1, .max = 3, .sub = RTX_8X16, .ctx = 2 },
    [RTX_32X8]  = { .w = 8, .h = 2, .lw = 3, .lh = 1,
                    .min = 1, .max = 3, .sub = RTX_16X8, .ctx = 2 },
    [RTX_16X64] = { .w = 4, .h = 16, .lw = 2, .lh = 4,
                    .min = 2, .max = 4, .sub = RTX_16X32, .ctx = 3 },
    [RTX_64X16] = { .w = 16, .h = 4, .lw = 4, .lh = 2,
                    .min = 2, .max = 4, .sub = RTX_32X16, .ctx = 3 },
};

const uint8_t /* enum (Rect)TxfmSize */
    dav1d_max_txfm_size_for_bs[N_BS_SIZES][4 /* y, 420, 422, 444 */] =
{
    [BS_128x128] = {  TX_64X64,  TX_32X32,  TX_32X32,  TX_32X32 },
    [BS_128x64]  = {  TX_64X64,  TX_32X32,  TX_32X32,  TX_32X32 },
    [BS_64x128]  = {  TX_64X64,  TX_32X32,       0,    TX_32X32 },
    [BS_64x64]   = {  TX_64X64,  TX_32X32,  TX_32X32,  TX_32X32 },
    [BS_64x32]   = { RTX_64X32, RTX_32X16,  TX_32X32,  TX_32X32 },
    [BS_64x16]   = { RTX_64X16, RTX_32X8,  RTX_32X16, RTX_32X16 },
    [BS_32x64]   = { RTX_32X64, RTX_16X32,       0,    TX_32X32 },
    [BS_32x32]   = {  TX_32X32,  TX_16X16, RTX_16X32,  TX_32X32 },
    [BS_32x16]   = { RTX_32X16, RTX_16X8,   TX_16X16, RTX_32X16 },
    [BS_32x8]    = { RTX_32X8,  RTX_16X4,  RTX_16X8,  RTX_32X8  },
    [BS_16x64]   = { RTX_16X64, RTX_8X32,        0,   RTX_16X32 },
    [BS_16x32]   = { RTX_16X32, RTX_8X16,        0,   RTX_16X32 },
    [BS_16x16]   = {  TX_16X16,  TX_8X8,   RTX_8X16,   TX_16X16 },
    [BS_16x8]    = { RTX_16X8,  RTX_8X4,    TX_8X8,   RTX_16X8  },
    [BS_16x4]    = { RTX_16X4,  RTX_8X4,   RTX_8X4,   RTX_16X4  },
    [BS_8x32]    = { RTX_8X32,  RTX_4X16,       0,    RTX_8X32  },
    [BS_8x16]    = { RTX_8X16,  RTX_4X8,        0,    RTX_8X16  },
    [BS_8x8]     = {  TX_8X8,    TX_4X4,   RTX_4X8,    TX_8X8   },
    [BS_8x4]     = { RTX_8X4,    TX_4X4,    TX_4X4,   RTX_8X4   },
    [BS_4x16]    = { RTX_4X16,  RTX_4X8,        0,    RTX_4X16  },
    [BS_4x8]     = { RTX_4X8,    TX_4X4,        0,    RTX_4X8   },
    [BS_4x4]     = {  TX_4X4,    TX_4X4,    TX_4X4,    TX_4X4   },
};

const uint8_t /* enum TxfmType */
    dav1d_txtp_from_uvmode[N_UV_INTRA_PRED_MODES] =
{
    [DC_PRED]              = DCT_DCT,
    [VERT_PRED]            = ADST_DCT,
    [HOR_PRED]             = DCT_ADST,
    [DIAG_DOWN_LEFT_PRED]  = DCT_DCT,
    [DIAG_DOWN_RIGHT_PRED] = ADST_ADST,
    [VERT_RIGHT_PRED]      = ADST_DCT,
    [HOR_DOWN_PRED]        = DCT_ADST,
    [HOR_UP_PRED]          = DCT_ADST,
    [VERT_LEFT_PRED]       = ADST_DCT,
    [SMOOTH_PRED]          = ADST_ADST,
    [SMOOTH_V_PRED]        = ADST_DCT,
    [SMOOTH_H_PRED]        = DCT_ADST,
    [PAETH_PRED]           = ADST_ADST,
};

const uint8_t /* enum InterPredMode */
    dav1d_comp_inter_pred_modes[N_COMP_INTER_PRED_MODES][2] =
{
    [NEARESTMV_NEARESTMV] = { NEARESTMV, NEARESTMV },
    [NEARMV_NEARMV]       = { NEARMV,    NEARMV    },
    [NEWMV_NEWMV]         = { NEWMV,     NEWMV     },
    [GLOBALMV_GLOBALMV]   = { GLOBALMV,  GLOBALMV  },
    [NEWMV_NEARESTMV]     = { NEWMV,     NEARESTMV },
    [NEWMV_NEARMV]        = { NEWMV,     NEARMV    },
    [NEARESTMV_NEWMV]     = { NEARESTMV, NEWMV     },
    [NEARMV_NEWMV]        = { NEARMV,    NEWMV     },
};

const uint8_t dav1d_partition_type_count[N_BL_LEVELS] = {
    [BL_128X128] = N_PARTITIONS - 3,
    [BL_64X64]   = N_PARTITIONS - 1,
    [BL_32X32]   = N_PARTITIONS - 1,
    [BL_16X16]   = N_PARTITIONS - 1,
    [BL_8X8]     = N_SUB8X8_PARTITIONS - 1,
};

const uint8_t /* enum TxfmType */ dav1d_tx_types_per_set[40] = {
    /* Intra2 */
    IDTX, DCT_DCT, ADST_ADST, ADST_DCT, DCT_ADST,
    /* Intra1 */
    IDTX, DCT_DCT, V_DCT, H_DCT, ADST_ADST, ADST_DCT, DCT_ADST,
    /* Inter2 */
    IDTX, V_DCT, H_DCT, DCT_DCT, ADST_DCT, DCT_ADST, FLIPADST_DCT,
    DCT_FLIPADST, ADST_ADST, FLIPADST_FLIPADST, ADST_FLIPADST, FLIPADST_ADST,
    /* Inter1 */
    IDTX, V_DCT, H_DCT, V_ADST, H_ADST, V_FLIPADST, H_FLIPADST,
    DCT_DCT, ADST_DCT, DCT_ADST, FLIPADST_DCT, DCT_FLIPADST,
    ADST_ADST, FLIPADST_FLIPADST, ADST_FLIPADST, FLIPADST_ADST,
};

const uint8_t dav1d_ymode_size_context[N_BS_SIZES] = {
    [BS_128x128] = 3,
    [BS_128x64]  = 3,
    [BS_64x128]  = 3,
    [BS_64x64]   = 3,
    [BS_64x32]   = 3,
    [BS_64x16]   = 2,
    [BS_32x64]   = 3,
    [BS_32x32]   = 3,
    [BS_32x16]   = 2,
    [BS_32x8 ]   = 1,
    [BS_16x64]   = 2,
    [BS_16x32]   = 2,
    [BS_16x16]   = 2,
    [BS_16x8 ]   = 1,
    [BS_16x4 ]   = 0,
    [BS_8x32 ]   = 1,
    [BS_8x16 ]   = 1,
    [BS_8x8  ]   = 1,
    [BS_8x4  ]   = 0,
    [BS_4x16 ]   = 0,
    [BS_4x8  ]   = 0,
    [BS_4x4  ]   = 0,
};

const uint8_t dav1d_lo_ctx_offsets[3][5][5] = {
    { /* w == h */
        {  0,  1,  6,  6, 21 },
        {  1,  6,  6, 21, 21 },
        {  6,  6, 21, 21, 21 },
        {  6, 21, 21, 21, 21 },
        { 21, 21, 21, 21, 21 },
    }, { /* w > h */
        {  0, 16,  6,  6, 21 },
        { 16, 16,  6, 21, 21 },
        { 16, 16, 21, 21, 21 },
        { 16, 16, 21, 21, 21 },
        { 16, 16, 21, 21, 21 },
    }, { /* w < h */
        {  0, 11, 11, 11, 11 },
        { 11, 11, 11, 11, 11 },
        {  6,  6, 21, 21, 21 },
        {  6, 21, 21, 21, 21 },
        { 21, 21, 21, 21, 21 },
    },
};

const uint8_t dav1d_skip_ctx[5][5] = {
    { 1, 2, 2, 2, 3 },
    { 2, 4, 4, 4, 5 },
    { 2, 4, 4, 4, 5 },
    { 2, 4, 4, 4, 5 },
    { 3, 5, 5, 5, 6 },
};

const uint8_t /* enum TxClass */ dav1d_tx_type_class[N_TX_TYPES_PLUS_LL] = {
    [DCT_DCT]           = TX_CLASS_2D,
    [ADST_DCT]          = TX_CLASS_2D,
    [DCT_ADST]          = TX_CLASS_2D,
    [ADST_ADST]         = TX_CLASS_2D,
    [FLIPADST_DCT]      = TX_CLASS_2D,
    [DCT_FLIPADST]      = TX_CLASS_2D,
    [FLIPADST_FLIPADST] = TX_CLASS_2D,
    [ADST_FLIPADST]     = TX_CLASS_2D,
    [FLIPADST_ADST]     = TX_CLASS_2D,
    [IDTX]              = TX_CLASS_2D,
    [V_DCT]             = TX_CLASS_V,
    [H_DCT]             = TX_CLASS_H,
    [V_ADST]            = TX_CLASS_V,
    [H_ADST]            = TX_CLASS_H,
    [V_FLIPADST]        = TX_CLASS_V,
    [H_FLIPADST]        = TX_CLASS_H,
    [WHT_WHT]           = TX_CLASS_2D,
};

const uint8_t /* enum Filter2d */ dav1d_filter_2d[DAV1D_N_FILTERS][DAV1D_N_FILTERS] = {
    [DAV1D_FILTER_8TAP_REGULAR] = {
        [DAV1D_FILTER_8TAP_REGULAR] = FILTER_2D_8TAP_REGULAR,
        [DAV1D_FILTER_8TAP_SHARP]   = FILTER_2D_8TAP_REGULAR_SHARP,
        [DAV1D_FILTER_8TAP_SMOOTH]  = FILTER_2D_8TAP_REGULAR_SMOOTH,
    }, [DAV1D_FILTER_8TAP_SHARP] = {
        [DAV1D_FILTER_8TAP_REGULAR] = FILTER_2D_8TAP_SHARP_REGULAR,
        [DAV1D_FILTER_8TAP_SHARP]   = FILTER_2D_8TAP_SHARP,
        [DAV1D_FILTER_8TAP_SMOOTH]  = FILTER_2D_8TAP_SHARP_SMOOTH,
    }, [DAV1D_FILTER_8TAP_SMOOTH] = {
        [DAV1D_FILTER_8TAP_REGULAR] = FILTER_2D_8TAP_SMOOTH_REGULAR,
        [DAV1D_FILTER_8TAP_SHARP]   = FILTER_2D_8TAP_SMOOTH_SHARP,
        [DAV1D_FILTER_8TAP_SMOOTH]  = FILTER_2D_8TAP_SMOOTH,
    }, [DAV1D_FILTER_BILINEAR] = {
        [DAV1D_FILTER_BILINEAR]     = FILTER_2D_BILINEAR,
    }
};

const uint8_t /* enum Dav1dFilterMode */ dav1d_filter_dir[N_2D_FILTERS][2] = {
    [FILTER_2D_8TAP_REGULAR]        = { DAV1D_FILTER_8TAP_REGULAR, DAV1D_FILTER_8TAP_REGULAR },
    [FILTER_2D_8TAP_REGULAR_SMOOTH] = { DAV1D_FILTER_8TAP_SMOOTH,  DAV1D_FILTER_8TAP_REGULAR },
    [FILTER_2D_8TAP_REGULAR_SHARP]  = { DAV1D_FILTER_8TAP_SHARP,   DAV1D_FILTER_8TAP_REGULAR },
    [FILTER_2D_8TAP_SHARP_REGULAR]  = { DAV1D_FILTER_8TAP_REGULAR, DAV1D_FILTER_8TAP_SHARP   },
    [FILTER_2D_8TAP_SHARP_SMOOTH]   = { DAV1D_FILTER_8TAP_SMOOTH,  DAV1D_FILTER_8TAP_SHARP   },
    [FILTER_2D_8TAP_SHARP]          = { DAV1D_FILTER_8TAP_SHARP,   DAV1D_FILTER_8TAP_SHARP   },
    [FILTER_2D_8TAP_SMOOTH_REGULAR] = { DAV1D_FILTER_8TAP_REGULAR, DAV1D_FILTER_8TAP_SMOOTH  },
    [FILTER_2D_8TAP_SMOOTH]         = { DAV1D_FILTER_8TAP_SMOOTH,  DAV1D_FILTER_8TAP_SMOOTH  },
    [FILTER_2D_8TAP_SMOOTH_SHARP]   = { DAV1D_FILTER_8TAP_SHARP,   DAV1D_FILTER_8TAP_SMOOTH  },
    [FILTER_2D_BILINEAR]            = { DAV1D_FILTER_BILINEAR,     DAV1D_FILTER_BILINEAR     },
};

const uint8_t dav1d_filter_mode_to_y_mode[5] = {
    DC_PRED, VERT_PRED, HOR_PRED, HOR_DOWN_PRED, DC_PRED
};

const uint8_t dav1d_intra_mode_context[N_INTRA_PRED_MODES] = {
    [DC_PRED]              = 0,
    [VERT_PRED]            = 1,
    [HOR_PRED]             = 2,
    [DIAG_DOWN_LEFT_PRED]  = 3,
    [DIAG_DOWN_RIGHT_PRED] = 4,
    [VERT_RIGHT_PRED]      = 4,
    [HOR_DOWN_PRED]        = 4,
    [HOR_UP_PRED]          = 4,
    [VERT_LEFT_PRED]       = 3,
    [SMOOTH_PRED]          = 0,
    [SMOOTH_V_PRED]        = 1,
    [SMOOTH_H_PRED]        = 2,
    [PAETH_PRED]           = 0,
};

const uint8_t dav1d_wedge_ctx_lut[N_BS_SIZES] = {
    [BS_32x32] = 6,
    [BS_32x16] = 5,
    [BS_32x8]  = 8,
    [BS_16x32] = 4,
    [BS_16x16] = 3,
    [BS_16x8]  = 2,
    [BS_8x32]  = 7,
    [BS_8x16]  = 1,
    [BS_8x8]   = 0,
};

const Dav1dWarpedMotionParams dav1d_default_wm_params = {
    .type = DAV1D_WM_TYPE_IDENTITY,
    .matrix = {
        0, 0, 1 << 16,
        0, 0, 1 << 16,
    },
    .u.p.alpha = 0,
    .u.p.beta = 0,
    .u.p.gamma = 0,
    .u.p.delta = 0,
};

const int8_t dav1d_cdef_directions[2 + 8 + 2 /* dir */][2 /* pass */] = {
    {  1 * 12 + 0,  2 * 12 + 0 }, // 6
    {  1 * 12 + 0,  2 * 12 - 1 }, // 7
    { -1 * 12 + 1, -2 * 12 + 2 }, // 0
    {  0 * 12 + 1, -1 * 12 + 2 }, // 1
    {  0 * 12 + 1,  0 * 12 + 2 }, // 2
    {  0 * 12 + 1,  1 * 12 + 2 }, // 3
    {  1 * 12 + 1,  2 * 12 + 2 }, // 4
    {  1 * 12 + 0,  2 * 12 + 1 }, // 5
    {  1 * 12 + 0,  2 * 12 + 0 }, // 6
    {  1 * 12 + 0,  2 * 12 - 1 }, // 7
    { -1 * 12 + 1, -2 * 12 + 2 }, // 0
    {  0 * 12 + 1, -1 * 12 + 2 }, // 1
};

const uint16_t ALIGN(dav1d_sgr_params[16][2], 4) = {
    { 140, 3236 }, { 112, 2158 }, {  93, 1618 }, {  80, 1438 },
    {  70, 1295 }, {  58, 1177 }, {  47, 1079 }, {  37,  996 },
    {  30,  925 }, {  25,  863 }, {   0, 2589 }, {   0, 1618 },
    {   0, 1177 }, {   0,  925 }, {  56,    0 }, {  22,    0 },
};

const uint8_t ALIGN(dav1d_sgr_x_by_x[256], 64) = {
    255, 128,  85,  64,  51,  43,  37,  32,  28,  26,  23,  21,  20,  18,  17,
     16,  15,  14,  13,  13,  12,  12,  11,  11,  10,  10,   9,   9,   9,   9,
      8,   8,   8,   8,   7,   7,   7,   7,   7,   6,   6,   6,   6,   6,   6,
      6,   5,   5,   5,   5,   5,   5,   5,   5,   5,   5,   4,   4,   4,   4,
      4,   4,   4,   4,   4,   4,   4,   4,   4,   4,   4,   4,   4,   3,   3,
      3,   3,   3,   3,   3,   3,   3,   3,   3,   3,   3,   3,   3,   3,   3,
      3,   3,   3,   3,   3,   3,   3,   3,   3,   3,   3,   3,   2,   2,   2,
      2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,
      2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,
      2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,
      2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,   2,
      2,   2,   2,   2,   2,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,
      1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,
      1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,
      1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,
      1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,
      1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,
      0
};

const int8_t ALIGN(dav1d_mc_subpel_filters[6][15][8], 8) = {
    [DAV1D_FILTER_8TAP_REGULAR] = {
        {   0,   1,  -3,  63,   4,  -1,   0,   0 },
        {   0,   1,  -5,  61,   9,  -2,   0,   0 },
        {   0,   1,  -6,  58,  14,  -4,   1,   0 },
        {   0,   1,  -7,  55,  19,  -5,   1,   0 },
        {   0,   1,  -7,  51,  24,  -6,   1,   0 },
        {   0,   1,  -8,  47,  29,  -6,   1,   0 },
        {   0,   1,  -7,  42,  33,  -6,   1,   0 },
        {   0,   1,  -7,  38,  38,  -7,   1,   0 },
        {   0,   1,  -6,  33,  42,  -7,   1,   0 },
        {   0,   1,  -6,  29,  47,  -8,   1,   0 },
        {   0,   1,  -6,  24,  51,  -7,   1,   0 },
        {   0,   1,  -5,  19,  55,  -7,   1,   0 },
        {   0,   1,  -4,  14,  58,  -6,   1,   0 },
        {   0,   0,  -2,   9,  61,  -5,   1,   0 },
        {   0,   0,  -1,   4,  63,  -3,   1,   0 }
    }, [DAV1D_FILTER_8TAP_SMOOTH] = {
        {   0,   1,  14,  31,  17,   1,   0,   0 },
        {   0,   0,  13,  31,  18,   2,   0,   0 },
        {   0,   0,  11,  31,  20,   2,   0,   0 },
        {   0,   0,  10,  30,  21,   3,   0,   0 },
        {   0,   0,   9,  29,  22,   4,   0,   0 },
        {   0,   0,   8,  28,  23,   5,   0,   0 },
        {   0,  -1,   8,  27,  24,   6,   0,   0 },
        {   0,  -1,   7,  26,  26,   7,  -1,   0 },
        {   0,   0,   6,  24,  27,   8,  -1,   0 },
        {   0,   0,   5,  23,  28,   8,   0,   0 },
        {   0,   0,   4,  22,  29,   9,   0,   0 },
        {   0,   0,   3,  21,  30,  10,   0,   0 },
        {   0,   0,   2,  20,  31,  11,   0,   0 },
        {   0,   0,   2,  18,  31,  13,   0,   0 },
        {   0,   0,   1,  17,  31,  14,   1,   0 }
    }, [DAV1D_FILTER_8TAP_SHARP] = {
        {  -1,   1,  -3,  63,   4,  -1,   1,   0 },
        {  -1,   3,  -6,  62,   8,  -3,   2,  -1 },
        {  -1,   4,  -9,  60,  13,  -5,   3,  -1 },
        {  -2,   5, -11,  58,  19,  -7,   3,  -1 },
        {  -2,   5, -11,  54,  24,  -9,   4,  -1 },
        {  -2,   5, -12,  50,  30, -10,   4,  -1 },
        {  -2,   5, -12,  45,  35, -11,   5,  -1 },
        {  -2,   6, -12,  40,  40, -12,   6,  -2 },
        {  -1,   5, -11,  35,  45, -12,   5,  -2 },
        {  -1,   4, -10,  30,  50, -12,   5,  -2 },
        {  -1,   4,  -9,  24,  54, -11,   5,  -2 },
        {  -1,   3,  -7,  19,  58, -11,   5,  -2 },
        {  -1,   3,  -5,  13,  60,  -9,   4,  -1 },
        {  -1,   2,  -3,   8,  62,  -6,   3,  -1 },
        {   0,   1,  -1,   4,  63,  -3,   1,  -1 }
    /* width <= 4 */
    }, [3 + DAV1D_FILTER_8TAP_REGULAR] = {
        {   0,   0,  -2,  63,   4,  -1,   0,   0 },
        {   0,   0,  -4,  61,   9,  -2,   0,   0 },
        {   0,   0,  -5,  58,  14,  -3,   0,   0 },
        {   0,   0,  -6,  55,  19,  -4,   0,   0 },
        {   0,   0,  -6,  51,  24,  -5,   0,   0 },
        {   0,   0,  -7,  47,  29,  -5,   0,   0 },
        {   0,   0,  -6,  42,  33,  -5,   0,   0 },
        {   0,   0,  -6,  38,  38,  -6,   0,   0 },
        {   0,   0,  -5,  33,  42,  -6,   0,   0 },
        {   0,   0,  -5,  29,  47,  -7,   0,   0 },
        {   0,   0,  -5,  24,  51,  -6,   0,   0 },
        {   0,   0,  -4,  19,  55,  -6,   0,   0 },
        {   0,   0,  -3,  14,  58,  -5,   0,   0 },
        {   0,   0,  -2,   9,  61,  -4,   0,   0 },
        {   0,   0,  -1,   4,  63,  -2,   0,   0 }
    }, [3 + DAV1D_FILTER_8TAP_SMOOTH] = {
        {   0,   0,  15,  31,  17,   1,   0,   0 },
        {   0,   0,  13,  31,  18,   2,   0,   0 },
        {   0,   0,  11,  31,  20,   2,   0,   0 },
        {   0,   0,  10,  30,  21,   3,   0,   0 },
        {   0,   0,   9,  29,  22,   4,   0,   0 },
        {   0,   0,   8,  28,  23,   5,   0,   0 },
        {   0,   0,   7,  27,  24,   6,   0,   0 },
        {   0,   0,   6,  26,  26,   6,   0,   0 },
        {   0,   0,   6,  24,  27,   7,   0,   0 },
        {   0,   0,   5,  23,  28,   8,   0,   0 },
        {   0,   0,   4,  22,  29,   9,   0,   0 },
        {   0,   0,   3,  21,  30,  10,   0,   0 },
        {   0,   0,   2,  20,  31,  11,   0,   0 },
        {   0,   0,   2,  18,  31,  13,   0,   0 },
        {   0,   0,   1,  17,  31,  15,   0,   0 }
    /* Bilin scaled being very rarely used, add a new table entry
     * and use the put/prep_8tap_scaled code, thus acting as a
     * scaled bilinear filter. */
    }, [5] = {
        {   0,   0,   0, 60,   4,   0,   0,   0 },
        {   0,   0,   0, 56,   8,   0,   0,   0 },
        {   0,   0,   0, 52,  12,   0,   0,   0 },
        {   0,   0,   0, 48,  16,   0,   0,   0 },
        {   0,   0,   0, 44,  20,   0,   0,   0 },
        {   0,   0,   0, 40,  24,   0,   0,   0 },
        {   0,   0,   0, 36,  28,   0,   0,   0 },
        {   0,   0,   0, 32,  32,   0,   0,   0 },
        {   0,   0,   0, 28,  36,   0,   0,   0 },
        {   0,   0,   0, 24,  40,   0,   0,   0 },
        {   0,   0,   0, 20,  44,   0,   0,   0 },
        {   0,   0,   0, 16,  48,   0,   0,   0 },
        {   0,   0,   0, 12,  52,   0,   0,   0 },
        {   0,   0,   0,  8,  56,   0,   0,   0 },
        {   0,   0,   0,  4,  60,   0,   0,   0 }
    }
};

const int8_t ALIGN(dav1d_mc_warp_filter[193][8], 8) = {
    // [-1, 0)
    { 0,   0, 127,   1,   0, 0, 0, 0 }, { 0,  -1, 127,   2,   0, 0, 0, 0 },
    { 1,  -3, 127,   4, - 1, 0, 0, 0 }, { 1,  -4, 126,   6,  -2, 1, 0, 0 },
    { 1,  -5, 126,   8, - 3, 1, 0, 0 }, { 1,  -6, 125,  11,  -4, 1, 0, 0 },
    { 1,  -7, 124,  13, - 4, 1, 0, 0 }, { 2,  -8, 123,  15,  -5, 1, 0, 0 },
    { 2,  -9, 122,  18, - 6, 1, 0, 0 }, { 2, -10, 121,  20,  -6, 1, 0, 0 },
    { 2, -11, 120,  22, - 7, 2, 0, 0 }, { 2, -12, 119,  25,  -8, 2, 0, 0 },
    { 3, -13, 117,  27, - 8, 2, 0, 0 }, { 3, -13, 116,  29,  -9, 2, 0, 0 },
    { 3, -14, 114,  32, -10, 3, 0, 0 }, { 3, -15, 113,  35, -10, 2, 0, 0 },
    { 3, -15, 111,  37, -11, 3, 0, 0 }, { 3, -16, 109,  40, -11, 3, 0, 0 },
    { 3, -16, 108,  42, -12, 3, 0, 0 }, { 4, -17, 106,  45, -13, 3, 0, 0 },
    { 4, -17, 104,  47, -13, 3, 0, 0 }, { 4, -17, 102,  50, -14, 3, 0, 0 },
    { 4, -17, 100,  52, -14, 3, 0, 0 }, { 4, -18,  98,  55, -15, 4, 0, 0 },
    { 4, -18,  96,  58, -15, 3, 0, 0 }, { 4, -18,  94,  60, -16, 4, 0, 0 },
    { 4, -18,  91,  63, -16, 4, 0, 0 }, { 4, -18,  89,  65, -16, 4, 0, 0 },
    { 4, -18,  87,  68, -17, 4, 0, 0 }, { 4, -18,  85,  70, -17, 4, 0, 0 },
    { 4, -18,  82,  73, -17, 4, 0, 0 }, { 4, -18,  80,  75, -17, 4, 0, 0 },
    { 4, -18,  78,  78, -18, 4, 0, 0 }, { 4, -17,  75,  80, -18, 4, 0, 0 },
    { 4, -17,  73,  82, -18, 4, 0, 0 }, { 4, -17,  70,  85, -18, 4, 0, 0 },
    { 4, -17,  68,  87, -18, 4, 0, 0 }, { 4, -16,  65,  89, -18, 4, 0, 0 },
    { 4, -16,  63,  91, -18, 4, 0, 0 }, { 4, -16,  60,  94, -18, 4, 0, 0 },
    { 3, -15,  58,  96, -18, 4, 0, 0 }, { 4, -15,  55,  98, -18, 4, 0, 0 },
    { 3, -14,  52, 100, -17, 4, 0, 0 }, { 3, -14,  50, 102, -17, 4, 0, 0 },
    { 3, -13,  47, 104, -17, 4, 0, 0 }, { 3, -13,  45, 106, -17, 4, 0, 0 },
    { 3, -12,  42, 108, -16, 3, 0, 0 }, { 3, -11,  40, 109, -16, 3, 0, 0 },
    { 3, -11,  37, 111, -15, 3, 0, 0 }, { 2, -10,  35, 113, -15, 3, 0, 0 },
    { 3, -10,  32, 114, -14, 3, 0, 0 }, { 2, - 9,  29, 116, -13, 3, 0, 0 },
    { 2,  -8,  27, 117, -13, 3, 0, 0 }, { 2, - 8,  25, 119, -12, 2, 0, 0 },
    { 2,  -7,  22, 120, -11, 2, 0, 0 }, { 1, - 6,  20, 121, -10, 2, 0, 0 },
    { 1,  -6,  18, 122, - 9, 2, 0, 0 }, { 1, - 5,  15, 123, - 8, 2, 0, 0 },
    { 1,  -4,  13, 124, - 7, 1, 0, 0 }, { 1, - 4,  11, 125, - 6, 1, 0, 0 },
    { 1,  -3,   8, 126, - 5, 1, 0, 0 }, { 1, - 2,   6, 126, - 4, 1, 0, 0 },
    { 0,  -1,   4, 127, - 3, 1, 0, 0 }, { 0,   0,   2, 127, - 1, 0, 0, 0 },
    // [0, 1)
    {  0, 0,   0, 127,   1,   0, 0,  0 }, {  0, 0,  -1, 127,   2,   0, 0,  0 },
    {  0, 1,  -3, 127,   4,  -2, 1,  0 }, {  0, 1,  -5, 127,   6,  -2, 1,  0 },
    {  0, 2,  -6, 126,   8,  -3, 1,  0 }, { -1, 2,  -7, 126,  11,  -4, 2, -1 },
    { -1, 3,  -8, 125,  13,  -5, 2, -1 }, { -1, 3, -10, 124,  16,  -6, 3, -1 },
    { -1, 4, -11, 123,  18,  -7, 3, -1 }, { -1, 4, -12, 122,  20,  -7, 3, -1 },
    { -1, 4, -13, 121,  23,  -8, 3, -1 }, { -2, 5, -14, 120,  25,  -9, 4, -1 },
    { -1, 5, -15, 119,  27, -10, 4, -1 }, { -1, 5, -16, 118,  30, -11, 4, -1 },
    { -2, 6, -17, 116,  33, -12, 5, -1 }, { -2, 6, -17, 114,  35, -12, 5, -1 },
    { -2, 6, -18, 113,  38, -13, 5, -1 }, { -2, 7, -19, 111,  41, -14, 6, -2 },
    { -2, 7, -19, 110,  43, -15, 6, -2 }, { -2, 7, -20, 108,  46, -15, 6, -2 },
    { -2, 7, -20, 106,  49, -16, 6, -2 }, { -2, 7, -21, 104,  51, -16, 7, -2 },
    { -2, 7, -21, 102,  54, -17, 7, -2 }, { -2, 8, -21, 100,  56, -18, 7, -2 },
    { -2, 8, -22,  98,  59, -18, 7, -2 }, { -2, 8, -22,  96,  62, -19, 7, -2 },
    { -2, 8, -22,  94,  64, -19, 7, -2 }, { -2, 8, -22,  91,  67, -20, 8, -2 },
    { -2, 8, -22,  89,  69, -20, 8, -2 }, { -2, 8, -22,  87,  72, -21, 8, -2 },
    { -2, 8, -21,  84,  74, -21, 8, -2 }, { -2, 8, -22,  82,  77, -21, 8, -2 },
    { -2, 8, -21,  79,  79, -21, 8, -2 }, { -2, 8, -21,  77,  82, -22, 8, -2 },
    { -2, 8, -21,  74,  84, -21, 8, -2 }, { -2, 8, -21,  72,  87, -22, 8, -2 },
    { -2, 8, -20,  69,  89, -22, 8, -2 }, { -2, 8, -20,  67,  91, -22, 8, -2 },
    { -2, 7, -19,  64,  94, -22, 8, -2 }, { -2, 7, -19,  62,  96, -22, 8, -2 },
    { -2, 7, -18,  59,  98, -22, 8, -2 }, { -2, 7, -18,  56, 100, -21, 8, -2 },
    { -2, 7, -17,  54, 102, -21, 7, -2 }, { -2, 7, -16,  51, 104, -21, 7, -2 },
    { -2, 6, -16,  49, 106, -20, 7, -2 }, { -2, 6, -15,  46, 108, -20, 7, -2 },
    { -2, 6, -15,  43, 110, -19, 7, -2 }, { -2, 6, -14,  41, 111, -19, 7, -2 },
    { -1, 5, -13,  38, 113, -18, 6, -2 }, { -1, 5, -12,  35, 114, -17, 6, -2 },
    { -1, 5, -12,  33, 116, -17, 6, -2 }, { -1, 4, -11,  30, 118, -16, 5, -1 },
    { -1, 4, -10,  27, 119, -15, 5, -1 }, { -1, 4,  -9,  25, 120, -14, 5, -2 },
    { -1, 3,  -8,  23, 121, -13, 4, -1 }, { -1, 3,  -7,  20, 122, -12, 4, -1 },
    { -1, 3,  -7,  18, 123, -11, 4, -1 }, { -1, 3,  -6,  16, 124, -10, 3, -1 },
    { -1, 2,  -5,  13, 125,  -8, 3, -1 }, { -1, 2,  -4,  11, 126,  -7, 2, -1 },
    {  0, 1,  -3,   8, 126,  -6, 2,  0 }, {  0, 1,  -2,   6, 127,  -5, 1,  0 },
    {  0, 1,  -2,   4, 127,  -3, 1,  0 }, {  0, 0,   0,   2, 127,  -1, 0,  0 },
    // [1, 2)
    { 0, 0, 0,   1, 127,   0,   0, 0 }, { 0, 0, 0,  -1, 127,   2,   0, 0 },
    { 0, 0, 1,  -3, 127,   4,  -1, 0 }, { 0, 0, 1,  -4, 126,   6,  -2, 1 },
    { 0, 0, 1,  -5, 126,   8,  -3, 1 }, { 0, 0, 1,  -6, 125,  11,  -4, 1 },
    { 0, 0, 1,  -7, 124,  13,  -4, 1 }, { 0, 0, 2,  -8, 123,  15,  -5, 1 },
    { 0, 0, 2,  -9, 122,  18,  -6, 1 }, { 0, 0, 2, -10, 121,  20,  -6, 1 },
    { 0, 0, 2, -11, 120,  22,  -7, 2 }, { 0, 0, 2, -12, 119,  25,  -8, 2 },
    { 0, 0, 3, -13, 117,  27,  -8, 2 }, { 0, 0, 3, -13, 116,  29,  -9, 2 },
    { 0, 0, 3, -14, 114,  32, -10, 3 }, { 0, 0, 3, -15, 113,  35, -10, 2 },
    { 0, 0, 3, -15, 111,  37, -11, 3 }, { 0, 0, 3, -16, 109,  40, -11, 3 },
    { 0, 0, 3, -16, 108,  42, -12, 3 }, { 0, 0, 4, -17, 106,  45, -13, 3 },
    { 0, 0, 4, -17, 104,  47, -13, 3 }, { 0, 0, 4, -17, 102,  50, -14, 3 },
    { 0, 0, 4, -17, 100,  52, -14, 3 }, { 0, 0, 4, -18,  98,  55, -15, 4 },
    { 0, 0, 4, -18,  96,  58, -15, 3 }, { 0, 0, 4, -18,  94,  60, -16, 4 },
    { 0, 0, 4, -18,  91,  63, -16, 4 }, { 0, 0, 4, -18,  89,  65, -16, 4 },
    { 0, 0, 4, -18,  87,  68, -17, 4 }, { 0, 0, 4, -18,  85,  70, -17, 4 },
    { 0, 0, 4, -18,  82,  73, -17, 4 }, { 0, 0, 4, -18,  80,  75, -17, 4 },
    { 0, 0, 4, -18,  78,  78, -18, 4 }, { 0, 0, 4, -17,  75,  80, -18, 4 },
    { 0, 0, 4, -17,  73,  82, -18, 4 }, { 0, 0, 4, -17,  70,  85, -18, 4 },
    { 0, 0, 4, -17,  68,  87, -18, 4 }, { 0, 0, 4, -16,  65,  89, -18, 4 },
    { 0, 0, 4, -16,  63,  91, -18, 4 }, { 0, 0, 4, -16,  60,  94, -18, 4 },
    { 0, 0, 3, -15,  58,  96, -18, 4 }, { 0, 0, 4, -15,  55,  98, -18, 4 },
    { 0, 0, 3, -14,  52, 100, -17, 4 }, { 0, 0, 3, -14,  50, 102, -17, 4 },
    { 0, 0, 3, -13,  47, 104, -17, 4 }, { 0, 0, 3, -13,  45, 106, -17, 4 },
    { 0, 0, 3, -12,  42, 108, -16, 3 }, { 0, 0, 3, -11,  40, 109, -16, 3 },
    { 0, 0, 3, -11,  37, 111, -15, 3 }, { 0, 0, 2, -10,  35, 113, -15, 3 },
    { 0, 0, 3, -10,  32, 114, -14, 3 }, { 0, 0, 2,  -9,  29, 116, -13, 3 },
    { 0, 0, 2,  -8,  27, 117, -13, 3 }, { 0, 0, 2,  -8,  25, 119, -12, 2 },
    { 0, 0, 2,  -7,  22, 120, -11, 2 }, { 0, 0, 1,  -6,  20, 121, -10, 2 },
    { 0, 0, 1,  -6,  18, 122,  -9, 2 }, { 0, 0, 1,  -5,  15, 123,  -8, 2 },
    { 0, 0, 1,  -4,  13, 124,  -7, 1 }, { 0, 0, 1,  -4,  11, 125,  -6, 1 },
    { 0, 0, 1,  -3,   8, 126,  -5, 1 }, { 0, 0, 1,  -2,   6, 126,  -4, 1 },
    { 0, 0, 0,  -1,   4, 127,  -3, 1 }, { 0, 0, 0,   0,   2, 127,  -1, 0 },
    // dummy (replicate row index 191)
    { 0, 0, 0,   0,   2, 127,  -1, 0 },
};

const int8_t ALIGN(dav1d_resize_filter[64][8], 8) = {
    { 0,  0,  0, -128,    0,  0,  0, 0 }, { 0,  0,  1, -128,   -2,  1,  0, 0 },
    { 0, -1,  3, -127,   -4,  2, -1, 0 }, { 0, -1,  4, -127,   -6,  3, -1, 0 },
    { 0, -2,  6, -126,   -8,  3, -1, 0 }, { 0, -2,  7, -125,  -11,  4, -1, 0 },
    { 1, -2,  8, -125,  -13,  5, -2, 0 }, { 1, -3,  9, -124,  -15,  6, -2, 0 },
    { 1, -3, 10, -123,  -18,  6, -2, 1 }, { 1, -3, 11, -122,  -20,  7, -3, 1 },
    { 1, -4, 12, -121,  -22,  8, -3, 1 }, { 1, -4, 13, -120,  -25,  9, -3, 1 },
    { 1, -4, 14, -118,  -28,  9, -3, 1 }, { 1, -4, 15, -117,  -30, 10, -4, 1 },
    { 1, -5, 16, -116,  -32, 11, -4, 1 }, { 1, -5, 16, -114,  -35, 12, -4, 1 },
    { 1, -5, 17, -112,  -38, 12, -4, 1 }, { 1, -5, 18, -111,  -40, 13, -5, 1 },
    { 1, -5, 18, -109,  -43, 14, -5, 1 }, { 1, -6, 19, -107,  -45, 14, -5, 1 },
    { 1, -6, 19, -105,  -48, 15, -5, 1 }, { 1, -6, 19, -103,  -51, 16, -5, 1 },
    { 1, -6, 20, -101,  -53, 16, -6, 1 }, { 1, -6, 20,  -99,  -56, 17, -6, 1 },
    { 1, -6, 20,  -97,  -58, 17, -6, 1 }, { 1, -6, 20,  -95,  -61, 18, -6, 1 },
    { 2, -7, 20,  -93,  -64, 18, -6, 2 }, { 2, -7, 20,  -91,  -66, 19, -6, 1 },
    { 2, -7, 20,  -88,  -69, 19, -6, 1 }, { 2, -7, 20,  -86,  -71, 19, -6, 1 },
    { 2, -7, 20,  -84,  -74, 20, -7, 2 }, { 2, -7, 20,  -81,  -76, 20, -7, 1 },
    { 2, -7, 20,  -79,  -79, 20, -7, 2 }, { 1, -7, 20,  -76,  -81, 20, -7, 2 },
    { 2, -7, 20,  -74,  -84, 20, -7, 2 }, { 1, -6, 19,  -71,  -86, 20, -7, 2 },
    { 1, -6, 19,  -69,  -88, 20, -7, 2 }, { 1, -6, 19,  -66,  -91, 20, -7, 2 },
    { 2, -6, 18,  -64,  -93, 20, -7, 2 }, { 1, -6, 18,  -61,  -95, 20, -6, 1 },
    { 1, -6, 17,  -58,  -97, 20, -6, 1 }, { 1, -6, 17,  -56,  -99, 20, -6, 1 },
    { 1, -6, 16,  -53, -101, 20, -6, 1 }, { 1, -5, 16,  -51, -103, 19, -6, 1 },
    { 1, -5, 15,  -48, -105, 19, -6, 1 }, { 1, -5, 14,  -45, -107, 19, -6, 1 },
    { 1, -5, 14,  -43, -109, 18, -5, 1 }, { 1, -5, 13,  -40, -111, 18, -5, 1 },
    { 1, -4, 12,  -38, -112, 17, -5, 1 }, { 1, -4, 12,  -35, -114, 16, -5, 1 },
    { 1, -4, 11,  -32, -116, 16, -5, 1 }, { 1, -4, 10,  -30, -117, 15, -4, 1 },
    { 1, -3,  9,  -28, -118, 14, -4, 1 }, { 1, -3,  9,  -25, -120, 13, -4, 1 },
    { 1, -3,  8,  -22, -121, 12, -4, 1 }, { 1, -3,  7,  -20, -122, 11, -3, 1 },
    { 1, -2,  6,  -18, -123, 10, -3, 1 }, { 0, -2,  6,  -15, -124,  9, -3, 1 },
    { 0, -2,  5,  -13, -125,  8, -2, 1 }, { 0, -1,  4,  -11, -125,  7, -2, 0 },
    { 0, -1,  3,   -8, -126,  6, -2, 0 }, { 0, -1,  3,   -6, -127,  4, -1, 0 },
    { 0, -1,  2,   -4, -127,  3, -1, 0 }, { 0,  0,  1,   -2, -128,  1,  0, 0 },
};

const uint8_t ALIGN(dav1d_sm_weights[128], 16) = {
    // Unused, because we always offset by bs, which is at least 2.
      0,   0,
    // bs = 2
    255, 128,
    // bs = 4
    255, 149,  85,  64,
    // bs = 8
    255, 197, 146, 105,  73,  50,  37,  32,
    // bs = 16
    255, 225, 196, 170, 145, 123, 102,  84,
     68,  54,  43,  33,  26,  20,  17,  16,
    // bs = 32
    255, 240, 225, 210, 196, 182, 169, 157,
    145, 133, 122, 111, 101,  92,  83,  74,
     66,  59,  52,  45,  39,  34,  29,  25,
     21,  17,  14,  12,  10,   9,   8,   8,
    // bs = 64
    255, 248, 240, 233, 225, 218, 210, 203,
    196, 189, 182, 176, 169, 163, 156, 150,
    144, 138, 133, 127, 121, 116, 111, 106,
    101,  96,  91,  86,  82,  77,  73,  69,
     65,  61,  57,  54,  50,  47,  44,  41,
     38,  35,  32,  29,  27,  25,  22,  20,
     18,  16,  15,  13,  12,  10,   9,   8,
      7,   6,   6,   5,   5,   4,   4,   4
};

const uint16_t dav1d_dr_intra_derivative[44] = {
    // Values that are 0 will never be used
          0,    // Angles:
    1023, 0,    //  3,  93, 183
     547,       //  6,  96, 186
     372, 0, 0, //  9,  99, 189
     273,       // 14, 104, 194
     215, 0,    // 17, 107, 197
     178,       // 20, 110, 200
     151, 0,    // 23, 113, 203 (113 & 203 are base angles)
     132,       // 26, 116, 206
     116, 0,    // 29, 119, 209
     102, 0,    // 32, 122, 212
      90,       // 36, 126, 216
      80, 0,    // 39, 129, 219
      71,       // 42, 132, 222
      64, 0,    // 45, 135, 225 (45 & 135 are base angles)
      57,       // 48, 138, 228
      51, 0,    // 51, 141, 231
      45, 0,    // 54, 144, 234
      40,       // 58, 148, 238
      35, 0,    // 61, 151, 241
      31,       // 64, 154, 244
      27, 0,    // 67, 157, 247 (67 & 157 are base angles)
      23,       // 70, 160, 250
      19, 0,    // 73, 163, 253
      15, 0,    // 76, 166, 256
      11, 0,    // 81, 171, 261
       7,       // 84, 174, 264
       3        // 87, 177, 267
};

#if ARCH_X86
#define F(idx, f0, f1, f2, f3, f4, f5, f6) \
    [2*idx+0]  = f0, [2*idx+1]  = f1,      \
    [2*idx+16] = f2, [2*idx+17] = f3,      \
    [2*idx+32] = f4, [2*idx+33] = f5,      \
    [2*idx+48] = f6
#else
#define F(idx, f0, f1, f2, f3, f4, f5, f6) \
    [1*idx+0]  = f0, [1*idx+8]  = f1,      \
    [1*idx+16] = f2, [1*idx+24] = f3,      \
    [1*idx+32] = f4, [1*idx+40] = f5,      \
    [1*idx+48] = f6
#endif
const int8_t ALIGN(dav1d_filter_intra_taps[5][64], 64) = {
    {
        F( 0,  -6, 10,  0,  0,  0, 12,  0 ),
        F( 1,  -5,  2, 10,  0,  0,  9,  0 ),
        F( 2,  -3,  1,  1, 10,  0,  7,  0 ),
        F( 3,  -3,  1,  1,  2, 10,  5,  0 ),
        F( 4,  -4,  6,  0,  0,  0,  2, 12 ),
        F( 5,  -3,  2,  6,  0,  0,  2,  9 ),
        F( 6,  -3,  2,  2,  6,  0,  2,  7 ),
        F( 7,  -3,  1,  2,  2,  6,  3,  5 ),
    }, {
        F( 0, -10, 16,  0,  0,  0, 10,  0 ),
        F( 1,  -6,  0, 16,  0,  0,  6,  0 ),
        F( 2,  -4,  0,  0, 16,  0,  4,  0 ),
        F( 3,  -2,  0,  0,  0, 16,  2,  0 ),
        F( 4, -10, 16,  0,  0,  0,  0, 10 ),
        F( 5,  -6,  0, 16,  0,  0,  0,  6 ),
        F( 6,  -4,  0,  0, 16,  0,  0,  4 ),
        F( 7,  -2,  0,  0,  0, 16,  0,  2 ),
    }, {
        F( 0,  -8,  8,  0,  0,  0, 16,  0 ),
        F( 1,  -8,  0,  8,  0,  0, 16,  0 ),
        F( 2,  -8,  0,  0,  8,  0, 16,  0 ),
        F( 3,  -8,  0,  0,  0,  8, 16,  0 ),
        F( 4,  -4,  4,  0,  0,  0,  0, 16 ),
        F( 5,  -4,  0,  4,  0,  0,  0, 16 ),
        F( 6,  -4,  0,  0,  4,  0,  0, 16 ),
        F( 7,  -4,  0,  0,  0,  4,  0, 16 ),
    }, {
        F( 0,  -2,  8,  0,  0,  0, 10,  0 ),
        F( 1,  -1,  3,  8,  0,  0,  6,  0 ),
        F( 2,  -1,  2,  3,  8,  0,  4,  0 ),
        F( 3,   0,  1,  2,  3,  8,  2,  0 ),
        F( 4,  -1,  4,  0,  0,  0,  3, 10 ),
        F( 5,  -1,  3,  4,  0,  0,  4,  6 ),
        F( 6,  -1,  2,  3,  4,  0,  4,  4 ),
        F( 7,  -1,  2,  2,  3,  4,  3,  3 ),
    }, {
        F( 0, -12, 14,  0,  0,  0, 14,  0 ),
        F( 1, -10,  0, 14,  0,  0, 12,  0 ),
        F( 2,  -9,  0,  0, 14,  0, 11,  0 ),
        F( 3,  -8,  0,  0,  0, 14, 10,  0 ),
        F( 4, -10, 12,  0,  0,  0,  0, 14 ),
        F( 5,  -9,  1, 12,  0,  0,  0, 12 ),
        F( 6,  -8,  0,  0, 12,  0,  1, 11 ),
        F( 7,  -7,  0,  0,  1, 12,  1,  9 ),
    }
};

const uint8_t ALIGN(dav1d_obmc_masks[64], 16) = {
    /* Unused */
     0,  0,
    /* 2 */
    19,  0,
    /* 4 */
    25, 14,  5,  0,
    /* 8 */
    28, 22, 16, 11,  7,  3,  0,  0,
    /* 16 */
    30, 27, 24, 21, 18, 15, 12, 10,  8,  6,  4,  3,  0,  0,  0,  0,
    /* 32 */
    31, 29, 28, 26, 24, 23, 21, 20, 19, 17, 16, 14, 13, 12, 11,  9,
     8,  7,  6,  5,  4,  4,  3,  2,  0,  0,  0,  0,  0,  0,  0,  0,
};

// Taken from the spec. Range is [-2048, 2047], mean is 0 and stddev is 512
const int16_t dav1d_gaussian_sequence[2048] = {
    56,    568,   -180,  172,   124,   -84,   172,   -64,   -900,  24,   820,
    224,   1248,  996,   272,   -8,    -916,  -388,  -732,  -104,  -188, 800,
    112,   -652,  -320,  -376,  140,   -252,  492,   -168,  44,    -788, 588,
    -584,  500,   -228,  12,    680,   272,   -476,  972,   -100,  652,  368,
    432,   -196,  -720,  -192,  1000,  -332,  652,   -136,  -552,  -604, -4,
    192,   -220,  -136,  1000,  -52,   372,   -96,   -624,  124,   -24,  396,
    540,   -12,   -104,  640,   464,   244,   -208,  -84,   368,   -528, -740,
    248,   -968,  -848,  608,   376,   -60,   -292,  -40,   -156,  252,  -292,
    248,   224,   -280,  400,   -244,  244,   -60,   76,    -80,   212,  532,
    340,   128,   -36,   824,   -352,  -60,   -264,  -96,   -612,  416,  -704,
    220,   -204,  640,   -160,  1220,  -408,  900,   336,   20,    -336, -96,
    -792,  304,   48,    -28,   -1232, -1172, -448,  104,   -292,  -520, 244,
    60,    -948,  0,     -708,  268,   108,   356,   -548,  488,   -344, -136,
    488,   -196,  -224,  656,   -236,  -1128, 60,    4,     140,   276,  -676,
    -376,  168,   -108,  464,   8,     564,   64,    240,   308,   -300, -400,
    -456,  -136,  56,    120,   -408,  -116,  436,   504,   -232,  328,  844,
    -164,  -84,   784,   -168,  232,   -224,  348,   -376,  128,   568,  96,
    -1244, -288,  276,   848,   832,   -360,  656,   464,   -384,  -332, -356,
    728,   -388,  160,   -192,  468,   296,   224,   140,   -776,  -100, 280,
    4,     196,   44,    -36,   -648,  932,   16,    1428,  28,    528,  808,
    772,   20,    268,   88,    -332,  -284,  124,   -384,  -448,  208,  -228,
    -1044, -328,  660,   380,   -148,  -300,  588,   240,   540,   28,   136,
    -88,   -436,  256,   296,   -1000, 1400,  0,     -48,   1056,  -136, 264,
    -528,  -1108, 632,   -484,  -592,  -344,  796,   124,   -668,  -768, 388,
    1296,  -232,  -188,  -200,  -288,  -4,    308,   100,   -168,  256,  -500,
    204,   -508,  648,   -136,  372,   -272,  -120,  -1004, -552,  -548, -384,
    548,   -296,  428,   -108,  -8,    -912,  -324,  -224,  -88,   -112, -220,
    -100,  996,   -796,  548,   360,   -216,  180,   428,   -200,  -212, 148,
    96,    148,   284,   216,   -412,  -320,  120,   -300,  -384,  -604, -572,
    -332,  -8,    -180,  -176,  696,   116,   -88,   628,   76,    44,   -516,
    240,   -208,  -40,   100,   -592,  344,   -308,  -452,  -228,  20,   916,
    -1752, -136,  -340,  -804,  140,   40,    512,   340,   248,   184,  -492,
    896,   -156,  932,   -628,  328,   -688,  -448,  -616,  -752,  -100, 560,
    -1020, 180,   -800,  -64,   76,    576,   1068,  396,   660,   552,  -108,
    -28,   320,   -628,  312,   -92,   -92,   -472,  268,   16,    560,  516,
    -672,  -52,   492,   -100,  260,   384,   284,   292,   304,   -148, 88,
    -152,  1012,  1064,  -228,  164,   -376,  -684,  592,   -392,  156,  196,
    -524,  -64,   -884,  160,   -176,  636,   648,   404,   -396,  -436, 864,
    424,   -728,  988,   -604,  904,   -592,  296,   -224,  536,   -176, -920,
    436,   -48,   1176,  -884,  416,   -776,  -824,  -884,  524,   -548, -564,
    -68,   -164,  -96,   692,   364,   -692,  -1012, -68,   260,   -480, 876,
    -1116, 452,   -332,  -352,  892,   -1088, 1220,  -676,  12,    -292, 244,
    496,   372,   -32,   280,   200,   112,   -440,  -96,   24,    -644, -184,
    56,    -432,  224,   -980,  272,   -260,  144,   -436,  420,   356,  364,
    -528,  76,    172,   -744,  -368,  404,   -752,  -416,  684,   -688, 72,
    540,   416,   92,    444,   480,   -72,   -1416, 164,   -1172, -68,  24,
    424,   264,   1040,  128,   -912,  -524,  -356,  64,    876,   -12,  4,
    -88,   532,   272,   -524,  320,   276,   -508,  940,   24,    -400, -120,
    756,   60,    236,   -412,  100,   376,   -484,  400,   -100,  -740, -108,
    -260,  328,   -268,  224,   -200,  -416,  184,   -604,  -564,  -20,  296,
    60,    892,   -888,  60,    164,   68,    -760,  216,   -296,  904,  -336,
    -28,   404,   -356,  -568,  -208,  -1480, -512,  296,   328,   -360, -164,
    -1560, -776,  1156,  -428,  164,   -504,  -112,  120,   -216,  -148, -264,
    308,   32,    64,    -72,   72,    116,   176,   -64,   -272,  460,  -536,
    -784,  -280,  348,   108,   -752,  -132,  524,   -540,  -776,  116,  -296,
    -1196, -288,  -560,  1040,  -472,  116,   -848,  -1116, 116,   636,  696,
    284,   -176,  1016,  204,   -864,  -648,  -248,  356,   972,   -584, -204,
    264,   880,   528,   -24,   -184,  116,   448,   -144,  828,   524,  212,
    -212,  52,    12,    200,   268,   -488,  -404,  -880,  824,   -672, -40,
    908,   -248,  500,   716,   -576,  492,   -576,  16,    720,   -108, 384,
    124,   344,   280,   576,   -500,  252,   104,   -308,  196,   -188, -8,
    1268,  296,   1032,  -1196, 436,   316,   372,   -432,  -200,  -660, 704,
    -224,  596,   -132,  268,   32,    -452,  884,   104,   -1008, 424,  -1348,
    -280,  4,     -1168, 368,   476,   696,   300,   -8,    24,    180,  -592,
    -196,  388,   304,   500,   724,   -160,  244,   -84,   272,   -256, -420,
    320,   208,   -144,  -156,  156,   364,   452,   28,    540,   316,  220,
    -644,  -248,  464,   72,    360,   32,    -388,  496,   -680,  -48,  208,
    -116,  -408,  60,    -604,  -392,  548,   -840,  784,   -460,  656,  -544,
    -388,  -264,  908,   -800,  -628,  -612,  -568,  572,   -220,  164,  288,
    -16,   -308,  308,   -112,  -636,  -760,  280,   -668,  432,   364,  240,
    -196,  604,   340,   384,   196,   592,   -44,   -500,  432,   -580, -132,
    636,   -76,   392,   4,     -412,  540,   508,   328,   -356,  -36,  16,
    -220,  -64,   -248,  -60,   24,    -192,  368,   1040,  92,    -24,  -1044,
    -32,   40,    104,   148,   192,   -136,  -520,  56,    -816,  -224, 732,
    392,   356,   212,   -80,   -424,  -1008, -324,  588,   -1496, 576,  460,
    -816,  -848,  56,    -580,  -92,   -1372, -112,  -496,  200,   364,  52,
    -140,  48,    -48,   -60,   84,    72,    40,    132,   -356,  -268, -104,
    -284,  -404,  732,   -520,  164,   -304,  -540,  120,   328,   -76,  -460,
    756,   388,   588,   236,   -436,  -72,   -176,  -404,  -316,  -148, 716,
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};
