57641410d1
I benchmarked the result by measuring the number of gperftools samples that
hit anywhere in the AAC decoder (starting from aac_decode_frame()) or
specifically in butterflies_float_c() / ff_butterflies_float_vfp() for the
same sample AAC stream:
Before After
Mean StdDev Mean StdDev Confidence Change
Audio decode 1542.8 43.7 1470.5 41.5 100.0% +4.9%
butterflies_float 130.0 11.9 70.2 12.1 100.0% +85.2%
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
47 lines
1.7 KiB
C
47 lines
1.7 KiB
C
/*
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* Copyright (c) 2008 Siarhei Siamashka <ssvb@users.sourceforge.net>
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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/float_dsp.h"
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#include "cpu.h"
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#include "float_dsp_arm.h"
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void ff_vector_fmul_vfp(float *dst, const float *src0, const float *src1,
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int len);
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void ff_vector_fmul_window_vfp(float *dst, const float *src0,
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const float *src1, const float *win, int len);
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void ff_vector_fmul_reverse_vfp(float *dst, const float *src0,
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const float *src1, int len);
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void ff_butterflies_float_vfp(float *restrict v1, float *restrict v2, int len);
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av_cold void ff_float_dsp_init_vfp(AVFloatDSPContext *fdsp, int cpu_flags)
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{
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if (!have_vfpv3(cpu_flags)) {
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fdsp->vector_fmul = ff_vector_fmul_vfp;
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fdsp->vector_fmul_window = ff_vector_fmul_window_vfp;
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}
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fdsp->vector_fmul_reverse = ff_vector_fmul_reverse_vfp;
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if (!have_vfpv3(cpu_flags))
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fdsp->butterflies_float = ff_butterflies_float_vfp;
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}
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