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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 "libavutil/cpu.h"
#include "libavutil/x86/cpu.h"
#include "libavfilter/scene_sad.h"
#define SCENE_SAD_FUNC(FUNC_NAME, ASM_FUNC_NAME, MMSIZE) \
void ASM_FUNC_NAME(SCENE_SAD_PARAMS); \
\
static void FUNC_NAME(SCENE_SAD_PARAMS) { \
uint64_t sad[MMSIZE / 8] = {0}; \
ptrdiff_t awidth = width & ~(MMSIZE - 1); \
*sum = 0; \
ASM_FUNC_NAME(src1, stride1, src2, stride2, awidth, height, sad); \
for (int i = 0; i < MMSIZE / 8; i++) \
*sum += sad[i]; \
ff_scene_sad_c(src1 + awidth, stride1, \
src2 + awidth, stride2, \
width - awidth, height, sad); \
*sum += sad[0]; \
}
#if HAVE_X86ASM
SCENE_SAD_FUNC(scene_sad_sse2, ff_scene_sad_sse2, 16)
#if HAVE_AVX2_EXTERNAL
SCENE_SAD_FUNC(scene_sad_avx2, ff_scene_sad_avx2, 32)
#endif
#endif
ff_scene_sad_fn ff_scene_sad_get_fn_x86(int depth)
{
#if HAVE_X86ASM
int cpu_flags = av_get_cpu_flags();
if (depth == 8) {
#if HAVE_AVX2_EXTERNAL
if (EXTERNAL_AVX2_FAST(cpu_flags))
return scene_sad_avx2;
#endif
if (EXTERNAL_SSE2(cpu_flags))
return scene_sad_sse2;
}
#endif
return NULL;
}
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