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https://github.com/FFmpeg/FFmpeg.git
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2cdbcc0048
Timings for Arrandale:
C SSE
win32: 2108 334
win64: 1152 322
Factorizing the inner loop with a call/jmp is a >15 cycles cost, even with
the jmp destination being aligned.
Unrolling for ARCH_X86_64 is a 20 cycles gain.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
39 lines
1.4 KiB
C
39 lines
1.4 KiB
C
/*
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* copyright (c) 2008 Michael Niedermayer <michaelni@gmx.at>
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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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#ifndef AVCODEC_SYNTH_FILTER_H
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#define AVCODEC_SYNTH_FILTER_H
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#include "fft.h"
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typedef struct SynthFilterContext {
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void (*synth_filter_float)(FFTContext *imdct,
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float *synth_buf_ptr, int *synth_buf_offset,
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float synth_buf2[32], const float window[512],
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float out[32], const float in[32],
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float scale);
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} SynthFilterContext;
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void ff_synth_filter_init(SynthFilterContext *c);
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void ff_synth_filter_init_arm(SynthFilterContext *c);
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void ff_synth_filter_init_x86(SynthFilterContext *c);
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#endif /* AVCODEC_SYNTH_FILTER_H */
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