90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
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/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "common.h"
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#include "pixelutils.h"
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#include "internal.h"
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#if CONFIG_PIXELUTILS
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#include "x86/pixelutils.h"
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static av_always_inline int sad_wxh(const uint8_t *src1, ptrdiff_t stride1,
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const uint8_t *src2, ptrdiff_t stride2,
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int w, int h)
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{
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int x, y, sum = 0;
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for (y = 0; y < h; y++) {
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for (x = 0; x < w; x++)
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sum += abs(src1[x] - src2[x]);
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src1 += stride1;
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src2 += stride2;
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}
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return sum;
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}
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#define DECLARE_BLOCK_FUNCTIONS(size) \
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static int block_sad_##size##x##size##_c(const uint8_t *src1, ptrdiff_t stride1, \
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const uint8_t *src2, ptrdiff_t stride2) \
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{ \
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return sad_wxh(src1, stride1, src2, stride2, size, size); \
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}
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DECLARE_BLOCK_FUNCTIONS(2)
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DECLARE_BLOCK_FUNCTIONS(4)
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DECLARE_BLOCK_FUNCTIONS(8)
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DECLARE_BLOCK_FUNCTIONS(16)
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DECLARE_BLOCK_FUNCTIONS(32)
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static const av_pixelutils_sad_fn sad_c[] = {
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block_sad_2x2_c,
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block_sad_4x4_c,
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block_sad_8x8_c,
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block_sad_16x16_c,
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block_sad_32x32_c,
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};
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#endif /* CONFIG_PIXELUTILS */
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av_pixelutils_sad_fn av_pixelutils_get_sad_fn(int w_bits, int h_bits, int aligned, void *log_ctx)
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{
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#if !CONFIG_PIXELUTILS
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av_log(log_ctx, AV_LOG_ERROR, "pixelutils support is required "
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"but libavutil is not compiled with it\n");
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return NULL;
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#else
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av_pixelutils_sad_fn sad[FF_ARRAY_ELEMS(sad_c)];
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memcpy(sad, sad_c, sizeof(sad));
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if (w_bits < 1 || w_bits > FF_ARRAY_ELEMS(sad) ||
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h_bits < 1 || h_bits > FF_ARRAY_ELEMS(sad))
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return NULL;
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if (w_bits != h_bits) // only squared sad for now
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return NULL;
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#if ARCH_X86
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ff_pixelutils_sad_init_x86(sad, aligned);
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#endif
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return sad[w_bits - 1];
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#endif
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}
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