libavcodec/x86/lossless_videoencdsp_init.c

   1 /*
   2  * SIMD-optimized lossless video encoding functions
   3  * Copyright (c) 2000, 2001 Fabrice Bellard
   4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
   5  *
   6  * MMX optimization by Nick Kurshev <nickols_k@mail.ru>
   7  *
   8  * This file is part of FFmpeg.
   9  *
  10  * FFmpeg is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * FFmpeg is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with FFmpeg; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  23  */
  24
  25 #include "libavutil/attributes.h"
  26 #include "libavutil/cpu.h"
  27 #include "libavutil/x86/asm.h"
  28 #include "libavutil/x86/cpu.h"
  29 #include "libavcodec/lossless_videoencdsp.h"
  30 #include "libavcodec/mathops.h"
  31
  32 void ff_diff_bytes_sse2(uint8_t *dst, const uint8_t *src1, const uint8_t *src2,
  33                         intptr_t w);
  34 void ff_diff_bytes_avx2(uint8_t *dst, const uint8_t *src1, const uint8_t *src2,
  35                         intptr_t w);
  36
  37 void ff_sub_left_predict_avx(uint8_t *dst, const uint8_t *src,
  38                             ptrdiff_t stride, ptrdiff_t width, int height);
  39
  40 #if HAVE_INLINE_ASM
  41
  42 static void sub_median_pred_mmxext(uint8_t *dst, const uint8_t *src1,
  43                                    const uint8_t *src2, intptr_t w,
  44                                    int *left, int *left_top)
  45 {
  46     x86_reg i = 0;
  47     uint8_t l, lt;
  48
  49     __asm__ volatile (
  50         "movq  (%1, %0), %%mm0          \n\t" // LT
  51         "psllq $8, %%mm0                \n\t"
  52         "1:                             \n\t"
  53         "movq  (%1, %0), %%mm1          \n\t" // T
  54         "movq  -1(%2, %0), %%mm2        \n\t" // L
  55         "movq  (%2, %0), %%mm3          \n\t" // X
  56         "movq %%mm2, %%mm4              \n\t" // L
  57         "psubb %%mm0, %%mm2             \n\t"
  58         "paddb %%mm1, %%mm2             \n\t" // L + T - LT
  59         "movq %%mm4, %%mm5              \n\t" // L
  60         "pmaxub %%mm1, %%mm4            \n\t" // max(T, L)
  61         "pminub %%mm5, %%mm1            \n\t" // min(T, L)
  62         "pminub %%mm2, %%mm4            \n\t"
  63         "pmaxub %%mm1, %%mm4            \n\t"
  64         "psubb %%mm4, %%mm3             \n\t" // dst - pred
  65         "movq %%mm3, (%3, %0)           \n\t"
  66         "add $8, %0                     \n\t"
  67         "movq -1(%1, %0), %%mm0         \n\t" // LT
  68         "cmp %4, %0                     \n\t"
  69         " jb 1b                         \n\t"
  70         : "+r" (i)
  71         : "r" (src1), "r" (src2), "r" (dst), "r" ((x86_reg) w));
  72
  73     l  = *left;
  74     lt = *left_top;
  75
  76     dst[0] = src2[0] - mid_pred(l, src1[0], (l + src1[0] - lt) & 0xFF);
  77
  78     *left_top = src1[w - 1];
  79     *left     = src2[w - 1];
  80 }
  81
  82 #endif /* HAVE_INLINE_ASM */
  83
  84 av_cold void ff_llvidencdsp_init_x86(LLVidEncDSPContext *c)
  85 {
  86     av_unused int cpu_flags = av_get_cpu_flags();
  87
  88 #if HAVE_INLINE_ASM
  89     if (INLINE_MMXEXT(cpu_flags)) {
  90         c->sub_median_pred = sub_median_pred_mmxext;
  91     }
  92 #endif /* HAVE_INLINE_ASM */
  93
  94     if (EXTERNAL_SSE2(cpu_flags)) {
  95         c->diff_bytes = ff_diff_bytes_sse2;
  96     }
  97
  98     if (EXTERNAL_AVX(cpu_flags)) {
  99         c->sub_left_predict = ff_sub_left_predict_avx;
 100     }
 101
 102     if (EXTERNAL_AVX2_FAST(cpu_flags)) {
 103         c->diff_bytes = ff_diff_bytes_avx2;
 104     }
 105 }