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9c978f243a
benchmarked on sandybridge x86_64: 1358232 decicycles in flac_lpc_32_c 1244575 decicycles in flac_lpc_32_sse4, James Almer's patch 650045 decicycles in flac_lpc_32_sse4, this patch I haven't tested the edgecases such as odd block lengths odd block length tested-by: James Almer <jamrial@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/*
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* Copyright (c) 2014 James Almer
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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 "libavcodec/flacdsp.h"
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#include "libavutil/x86/cpu.h"
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#include "config.h"
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void ff_flac_lpc_32_sse4(int32_t *samples, const int coeffs[32], int order,
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int qlevel, int len);
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av_cold void ff_flacdsp_init_x86(FLACDSPContext *c, enum AVSampleFormat fmt,
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int bps)
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{
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#if HAVE_YASM
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int cpu_flags = av_get_cpu_flags();
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if (EXTERNAL_SSE4(cpu_flags)) {
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if (bps > 16)
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c->lpc = ff_flac_lpc_32_sse4;
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}
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#endif
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}
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