/*

 * VVC DSP

 *

 * Copyright (C) 2021 Nuo Mi

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * FFmpeg 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#include "dsp.h"

#include "ctu.h"

#include "itx_1d.h"

#define VVC_SIGN(v) (v < 0 ? -1 : !!v)

static int vvc_sad(const int16_t *src0, const int16_t *src1, int dx, int dy,

    const int block_w, const int block_h)

{

    int sad = 0;

    dx -= 2;

    dy -= 2;

    src0 += (2 + dy) * MAX_PB_SIZE + 2 + dx;

    src1 += (2 - dy) * MAX_PB_SIZE + 2 - dx;

    for (int y = 0; y < block_h; y += 2) {

        for (int x = 0; x < block_w; x++) {

            sad += FFABS(src0[x] - src1[x]);

        }

        src0 += 2 * MAX_PB_SIZE;

        src1 += 2 * MAX_PB_SIZE;

    }

    return sad;

}

static av_always_inline void unpack_mip_info(int *intra_mip_transposed_flag,

    int *intra_mip_mode, const uint8_t mip_info)

{

    if (intra_mip_transposed_flag)

        *intra_mip_transposed_flag = (mip_info >> 1) & 0x1;

    if (intra_mip_mode)

        *intra_mip_mode = (mip_info >> 2) & 0xf;

}

typedef struct IntraEdgeParams {

    uint8_t* top;

    uint8_t* left;

    int filter_flag;

    uint16_t left_array[6 * MAX_TB_SIZE + 5];

    uint16_t filtered_left_array[6 * MAX_TB_SIZE + 5];

    uint16_t top_array[6 * MAX_TB_SIZE + 5];

    uint16_t filtered_top_array[6 * MAX_TB_SIZE + 5];

} IntraEdgeParams;

#define PROF_BORDER_EXT         1

#define PROF_BLOCK_SIZE         (AFFINE_MIN_BLOCK_SIZE + PROF_BORDER_EXT * 2)

#define BDOF_BORDER_EXT         1

#define BDOF_BLOCK_SIZE         16

#define BDOF_MIN_BLOCK_SIZE     4

#define BIT_DEPTH 8

#include "dsp_template.c"

#undef BIT_DEPTH

#define BIT_DEPTH 10

#include "dsp_template.c"

#undef BIT_DEPTH

#define BIT_DEPTH 12

#include "dsp_template.c"

#undef BIT_DEPTH

void ff_vvc_dsp_init(VVCDSPContext *vvcdsp, int bit_depth)

{

#undef FUNC

#define FUNC(a, depth) a ## _ ## depth

#define VVC_DSP(depth)                                                          \

    FUNC(ff_vvc_inter_dsp_init, depth)(&vvcdsp->inter);                         \

    FUNC(ff_vvc_intra_dsp_init, depth)(&vvcdsp->intra);                         \

    FUNC(ff_vvc_itx_dsp_init, depth)(&vvcdsp->itx);                             \

    FUNC(ff_vvc_lmcs_dsp_init, depth)(&vvcdsp->lmcs);                           \

    FUNC(ff_vvc_lf_dsp_init, depth)(&vvcdsp->lf);                               \

    FUNC(ff_vvc_sao_dsp_init, depth)(&vvcdsp->sao);                             \

    FUNC(ff_vvc_alf_dsp_init, depth)(&vvcdsp->alf);                             \

    switch (bit_depth) {

    case 12:

        VVC_DSP(12);

        break;

    case 10:

        VVC_DSP(10);

        break;

    default:

        VVC_DSP(8);

        break;

    }

#if ARCH_AARCH64

    ff_vvc_dsp_init_aarch64(vvcdsp, bit_depth);

#elif ARCH_RISCV

    ff_vvc_dsp_init_riscv(vvcdsp, bit_depth);

#elif ARCH_X86 && HAVE_X86ASM

    ff_vvc_dsp_init_x86(vvcdsp, bit_depth);

#endif

}