mirror of
https://github.com/FFmpeg/FFmpeg.git
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114 lines
3.9 KiB
C
114 lines
3.9 KiB
C
/*
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* SIMD-optimized HuffYUV encoding functions
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* Copyright (c) 2000, 2001 Fabrice Bellard
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* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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*
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* MMX optimization by Nick Kurshev <nickols_k@mail.ru>
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 "libavutil/attributes.h"
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#include "libavutil/cpu.h"
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#include "libavutil/x86/asm.h"
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#include "libavutil/x86/cpu.h"
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#include "libavcodec/huffyuvencdsp.h"
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#include "libavcodec/mathops.h"
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#if HAVE_INLINE_ASM
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static void diff_bytes_mmx(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w)
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{
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x86_reg i = 0;
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__asm__ volatile (
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"1: \n\t"
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"movq (%2, %0), %%mm0 \n\t"
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"movq (%1, %0), %%mm1 \n\t"
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"psubb %%mm0, %%mm1 \n\t"
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"movq %%mm1, (%3, %0) \n\t"
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"movq 8(%2, %0), %%mm0 \n\t"
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"movq 8(%1, %0), %%mm1 \n\t"
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"psubb %%mm0, %%mm1 \n\t"
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"movq %%mm1, 8(%3, %0) \n\t"
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"add $16, %0 \n\t"
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"cmp %4, %0 \n\t"
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" jb 1b \n\t"
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: "+r" (i)
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: "r" (src1), "r" (src2), "r" (dst), "r" ((x86_reg) w - 15));
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for (; i < w; i++)
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dst[i + 0] = src1[i + 0] - src2[i + 0];
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}
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static void sub_hfyu_median_pred_mmxext(uint8_t *dst, const uint8_t *src1,
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const uint8_t *src2, int w,
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int *left, int *left_top)
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{
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x86_reg i = 0;
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uint8_t l, lt;
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__asm__ volatile (
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"movq (%1, %0), %%mm0 \n\t" // LT
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"psllq $8, %%mm0 \n\t"
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"1: \n\t"
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"movq (%1, %0), %%mm1 \n\t" // T
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"movq -1(%2, %0), %%mm2 \n\t" // L
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"movq (%2, %0), %%mm3 \n\t" // X
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"movq %%mm2, %%mm4 \n\t" // L
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"psubb %%mm0, %%mm2 \n\t"
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"paddb %%mm1, %%mm2 \n\t" // L + T - LT
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"movq %%mm4, %%mm5 \n\t" // L
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"pmaxub %%mm1, %%mm4 \n\t" // max(T, L)
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"pminub %%mm5, %%mm1 \n\t" // min(T, L)
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"pminub %%mm2, %%mm4 \n\t"
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"pmaxub %%mm1, %%mm4 \n\t"
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"psubb %%mm4, %%mm3 \n\t" // dst - pred
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"movq %%mm3, (%3, %0) \n\t"
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"add $8, %0 \n\t"
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"movq -1(%1, %0), %%mm0 \n\t" // LT
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"cmp %4, %0 \n\t"
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" jb 1b \n\t"
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: "+r" (i)
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: "r" (src1), "r" (src2), "r" (dst), "r" ((x86_reg) w));
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l = *left;
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lt = *left_top;
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dst[0] = src2[0] - mid_pred(l, src1[0], (l + src1[0] - lt) & 0xFF);
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*left_top = src1[w - 1];
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*left = src2[w - 1];
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}
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#endif /* HAVE_INLINE_ASM */
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av_cold void ff_huffyuvencdsp_init_x86(HuffYUVEncDSPContext *c)
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{
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#if HAVE_INLINE_ASM
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int cpu_flags = av_get_cpu_flags();
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if (INLINE_MMX(cpu_flags)) {
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c->diff_bytes = diff_bytes_mmx;
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}
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if (INLINE_MMXEXT(cpu_flags)) {
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c->sub_hfyu_median_pred = sub_hfyu_median_pred_mmxext;
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}
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#endif /* HAVE_INLINE_ASM */
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}
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