chromium/third_party/ffmpeg/libavutil/pixelutils.c

/*
 * 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 <stddef.h>

#include "config.h"
#include "pixelutils.h"

#if CONFIG_PIXELUTILS
#include <stdlib.h>
#include <string.h>

#include "attributes.h"
#include "macros.h"

#include "x86/pixelutils.h"

static av_always_inline int sad_wxh(const uint8_t *src1, ptrdiff_t stride1,
                                    const uint8_t *src2, ptrdiff_t stride2,
                                    int w, int h)
{
    int x, y, sum = 0;

    for (y = 0; y < h; y++) {
        for (x = 0; x < w; x++)
            sum += abs(src1[x] - src2[x]);
        src1 += stride1;
        src2 += stride2;
    }
    return sum;
}

#define DECLARE_BLOCK_FUNCTIONS …

DECLARE_BLOCK_FUNCTIONS(2)
DECLARE_BLOCK_FUNCTIONS(4)
DECLARE_BLOCK_FUNCTIONS(8)
DECLARE_BLOCK_FUNCTIONS(16)
DECLARE_BLOCK_FUNCTIONS(32)

static const av_pixelutils_sad_fn sad_c[] = {
    block_sad_2x2_c,
    block_sad_4x4_c,
    block_sad_8x8_c,
    block_sad_16x16_c,
    block_sad_32x32_c,
};
#else
#include "log.h"
#endif /* CONFIG_PIXELUTILS */

av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits, int aligned, void *log_ctx)
{ … }