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https://github.com/FFmpeg/FFmpeg.git
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fd8b90f5f6
Also disable the mmx/iwht optimization when the bitexact flag is set. With synthetically coded coefficients (i.e. these that lead to a residual well outside the [-255,255] range), our optimizations will overflow. It doesn't make sense to fix the overflows, since they can only occur on synthetic input, not on real fwht-generated input. Thus, add a bitexact flag that disables this optimization.
42 lines
1.3 KiB
C
42 lines
1.3 KiB
C
/*
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* VP9 compatible video decoder
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*
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* Copyright (C) 2013 Ronald S. Bultje <rsbultje gmail com>
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* Copyright (C) 2013 Clément Bœsch <u pkh me>
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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/avassert.h"
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#include "libavutil/common.h"
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#include "vp9dsp.h"
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av_cold void ff_vp9dsp_init(VP9DSPContext *dsp, int bpp, int bitexact)
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{
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if (bpp == 8) {
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ff_vp9dsp_init_8(dsp);
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} else if (bpp == 10) {
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ff_vp9dsp_init_10(dsp);
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} else {
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av_assert0(bpp == 12);
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ff_vp9dsp_init_12(dsp);
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}
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if (ARCH_X86) ff_vp9dsp_init_x86(dsp, bpp, bitexact);
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if (ARCH_MIPS) ff_vp9dsp_init_mips(dsp, bpp);
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}
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