GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/x86/lossless_videoencdsp_init.c Lines: 11 19 57.9 %
Date: 2020-09-25 14:59:26 Branches: 9 10 90.0 %

Line Branch Exec Source
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/*
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 * SIMD-optimized lossless video 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 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 "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/lossless_videoencdsp.h"
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#include "libavcodec/mathops.h"
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void ff_diff_bytes_mmx(uint8_t *dst, const uint8_t *src1, const uint8_t *src2,
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                       intptr_t w);
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void ff_diff_bytes_sse2(uint8_t *dst, const uint8_t *src1, const uint8_t *src2,
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                        intptr_t w);
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void ff_diff_bytes_avx2(uint8_t *dst, const uint8_t *src1, const uint8_t *src2,
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                        intptr_t w);
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void ff_sub_left_predict_avx(uint8_t *dst, uint8_t *src,
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                            ptrdiff_t stride, ptrdiff_t width, int height);
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#if HAVE_INLINE_ASM
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static void sub_median_pred_mmxext(uint8_t *dst, const uint8_t *src1,
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                                   const uint8_t *src2, intptr_t 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_llvidencdsp_init_x86(LLVidEncDSPContext *c)
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{
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    av_unused int cpu_flags = av_get_cpu_flags();
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    if (ARCH_X86_32 && EXTERNAL_MMX(cpu_flags)) {
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        c->diff_bytes = ff_diff_bytes_mmx;
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    }
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#if HAVE_INLINE_ASM
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    if (INLINE_MMXEXT(cpu_flags)) {
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        c->sub_median_pred = sub_median_pred_mmxext;
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    }
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#endif /* HAVE_INLINE_ASM */
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    if (EXTERNAL_SSE2(cpu_flags)) {
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        c->diff_bytes = ff_diff_bytes_sse2;
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    }
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    if (EXTERNAL_AVX(cpu_flags)) {
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        c->sub_left_predict = ff_sub_left_predict_avx;
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    }
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    if (EXTERNAL_AVX2_FAST(cpu_flags)) {
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        c->diff_bytes = ff_diff_bytes_avx2;
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    }
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}