mirror of
https://github.com/FFmpeg/FFmpeg.git
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65 lines
2.7 KiB
C
65 lines
2.7 KiB
C
/*
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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 "pixelutils.h"
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#include "cpu.h"
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int ff_pixelutils_sad_8x8_mmx(const uint8_t *src1, ptrdiff_t stride1,
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const uint8_t *src2, ptrdiff_t stride2);
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int ff_pixelutils_sad_8x8_mmxext(const uint8_t *src1, ptrdiff_t stride1,
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const uint8_t *src2, ptrdiff_t stride2);
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int ff_pixelutils_sad_16x16_mmxext(const uint8_t *src1, ptrdiff_t stride1,
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const uint8_t *src2, ptrdiff_t stride2);
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int ff_pixelutils_sad_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1,
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const uint8_t *src2, ptrdiff_t stride2);
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int ff_pixelutils_sad_a_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1,
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const uint8_t *src2, ptrdiff_t stride2);
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int ff_pixelutils_sad_u_16x16_sse2(const uint8_t *src1, ptrdiff_t stride1,
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const uint8_t *src2, ptrdiff_t stride2);
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void ff_pixelutils_sad_init_x86(av_pixelutils_sad_fn *sad, int aligned)
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{
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int cpu_flags = av_get_cpu_flags();
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if (EXTERNAL_MMX(cpu_flags)) {
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sad[2] = ff_pixelutils_sad_8x8_mmx;
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}
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// The best way to use SSE2 would be to do 2 SADs in parallel,
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// but we'd have to modify the pixelutils API to return SIMD functions.
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// It's probably not faster to shuffle data around
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// to get two lines of 8 pixels into a single 16byte register,
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// so just use the MMX 8x8 version even when SSE2 is available.
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if (EXTERNAL_MMXEXT(cpu_flags)) {
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sad[2] = ff_pixelutils_sad_8x8_mmxext;
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sad[3] = ff_pixelutils_sad_16x16_mmxext;
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}
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if (EXTERNAL_SSE2(cpu_flags)) {
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switch (aligned) {
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case 0: sad[3] = ff_pixelutils_sad_16x16_sse2; break; // src1 unaligned, src2 unaligned
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case 1: sad[3] = ff_pixelutils_sad_u_16x16_sse2; break; // src1 aligned, src2 unaligned
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case 2: sad[3] = ff_pixelutils_sad_a_16x16_sse2; break; // src1 aligned, src2 aligned
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}
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}
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}
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