/*

 * Copyright © 2023, VideoLAN and dav1d authors

 * Copyright © 2023, 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 <string.h>

#include "common/attributes.h"

#include "src/pal.h"

// fill invisible edges and pack to 4-bit (2 pixels per byte)

static void pal_idx_finish_c(uint8_t *dst, const uint8_t *src,

                             const int bw, const int bh,

                             const int w, const int h)

{

    assert(bw >= 4 && bw <= 64 && !(bw & (bw - 1)));

    assert(bh >= 4 && bh <= 64 && !(bh & (bh - 1)));

    assert(w  >= 4 && w <= bw && !(w & 3));

    assert(h  >= 4 && h <= bh && !(h & 3));

    const int dst_w = w / 2;

    const int dst_bw = bw / 2;

    for (int y = 0; y < h; y++, src += bw, dst += dst_bw) {

        for (int x = 0; x < dst_w; x++)

            dst[x] = src[x * 2 + 0] | (src[x * 2 + 1] << 4);

        if (dst_w < dst_bw)

            memset(dst + dst_w, src[w - 1] * 0x11, dst_bw - dst_w);

    }

    if (h < bh) {

        const uint8_t *const last_row = &dst[-dst_bw];

        for (int y = h; y < bh; y++, dst += dst_bw)

            memcpy(dst, last_row, dst_bw);

    }

}

#if HAVE_ASM

#if ARCH_RISCV

#include "riscv/pal.h"

#elif ARCH_X86

#include "x86/pal.h"

#endif

#endif

COLD void dav1d_pal_dsp_init(Dav1dPalDSPContext *const c) {

    c->pal_idx_finish = pal_idx_finish_c;

#if HAVE_ASM

#if ARCH_RISCV

    pal_dsp_init_riscv(c);

#elif ARCH_X86

    pal_dsp_init_x86(c);

#endif

#endif

}