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/*
* 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 "config.h"
#include "common.h"
#include "pixelutils.h"
#include "internal.h"
#if CONFIG_PIXELUTILS
#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(size) \
static int block_sad_##size##x##size##_c(const uint8_t *src1, ptrdiff_t stride1, \
const uint8_t *src2, ptrdiff_t stride2) \
{ \
return sad_wxh(src1, stride1, src2, stride2, size, size); \
}
DECLARE_BLOCK_FUNCTIONS(2)
DECLARE_BLOCK_FUNCTIONS(4)
DECLARE_BLOCK_FUNCTIONS(8)
DECLARE_BLOCK_FUNCTIONS(16)
static const av_pixelutils_sad_fn sad_c[] = {
block_sad_2x2_c,
block_sad_4x4_c,
block_sad_8x8_c,
block_sad_16x16_c,
};
#endif /* CONFIG_PIXELUTILS */
av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits, int aligned, void *log_ctx)
{
#if !CONFIG_PIXELUTILS
av_log(log_ctx, AV_LOG_ERROR, "pixelutils support is required "
"but libavutil is not compiled with it\n");
return NULL;
#else
av_pixelutils_sad_fn sad[FF_ARRAY_ELEMS(sad_c)];
memcpy(sad, sad_c, sizeof(sad));
if (w_bits < 1 || w_bits > FF_ARRAY_ELEMS(sad) ||
h_bits < 1 || h_bits > FF_ARRAY_ELEMS(sad))
return NULL;
if (w_bits != h_bits) // only squared sad for now
return NULL;
#if ARCH_X86
ff_pixelutils_sad_init_x86(sad, aligned);
#endif
return sad[w_bits - 1];
#endif
}
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