2aef3d66c9
Start and end index are multiple of 2, therefore guaranteeing aligned access. Also, this allows to generate 4 floats per loop, keeping the alignment all along. Timing: - 32 bits: 326c -> 172c - 64 bits: 323c -> 156c Signed-off-by: Diego Biurrun <diego@biurrun.de>
44 lines
1.6 KiB
C
44 lines
1.6 KiB
C
/*
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* AAC Spectral Band Replication decoding functions
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* Copyright (c) 2012 Christophe Gisquet <christophe.gisquet@gmail.com>
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 "config.h"
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#include "libavutil/cpu.h"
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#include "libavutil/x86/cpu.h"
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#include "libavcodec/sbrdsp.h"
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float ff_sbr_sum_square_sse(float (*x)[2], int n);
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void ff_sbr_hf_g_filt_sse(float (*Y)[2], const float (*X_high)[40][2],
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const float *g_filt, int m_max, intptr_t ixh);
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void ff_sbr_hf_gen_sse(float (*X_high)[2], const float (*X_low)[2],
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const float alpha0[2], const float alpha1[2],
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float bw, int start, int end);
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void ff_sbrdsp_init_x86(SBRDSPContext *s)
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{
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int mm_flags = av_get_cpu_flags();
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if (EXTERNAL_SSE(mm_flags)) {
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s->sum_square = ff_sbr_sum_square_sse;
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s->hf_g_filt = ff_sbr_hf_g_filt_sse;
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s->hf_gen = ff_sbr_hf_gen_sse;
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}
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}
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