FFmpeg
libavcodec
x86
sbcdsp_init.c
Go to the documentation of this file.
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/*
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* Bluetooth low-complexity, subband codec (SBC)
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*
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* Copyright (C) 2017 Aurelien Jacobs <aurel@gnuage.org>
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* Copyright (C) 2008-2010 Nokia Corporation
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* Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
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* Copyright (C) 2004-2005 Henryk Ploetz <henryk@ploetzli.ch>
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* Copyright (C) 2005-2006 Brad Midgley <bmidgley@xmission.com>
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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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/**
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* @file
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* SBC MMX optimization for some basic "building bricks"
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*/
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#include "
libavutil/attributes.h
"
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#include "
libavutil/cpu.h
"
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#include "
libavutil/x86/cpu.h
"
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#include "
libavcodec/sbcdsp.h
"
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void
ff_sbc_analyze_4_mmx
(
const
int16_t *in,
int32_t
*
out
,
const
int16_t *consts);
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void
ff_sbc_analyze_8_mmx
(
const
int16_t *in,
int32_t
*
out
,
const
int16_t *consts);
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void
ff_sbc_calc_scalefactors_mmx
(
int32_t
sb_sample_f[16][2][8],
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uint32_t scale_factor[2][8],
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int
blocks,
int
channels
,
int
subbands
);
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av_cold
void
ff_sbcdsp_init_x86
(SBCDSPContext *
s
)
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{
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int
cpu_flags
=
av_get_cpu_flags
();
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if
(
EXTERNAL_MMX
(
cpu_flags
)) {
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s
->sbc_analyze_4 =
ff_sbc_analyze_4_mmx
;
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s
->sbc_analyze_8 =
ff_sbc_analyze_8_mmx
;
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s
->sbc_calc_scalefactors =
ff_sbc_calc_scalefactors_mmx
;
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}
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}
cpu.h
out
FILE * out
Definition:
movenc.c:55
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition:
cpu.c:109
subbands
subbands
Definition:
aptx.h:37
cpu_flags
static atomic_int cpu_flags
Definition:
cpu.c:56
sbcdsp.h
av_cold
#define av_cold
Definition:
attributes.h:90
s
#define s(width, name)
Definition:
cbs_vp9.c:198
channels
channels
Definition:
aptx.h:31
ff_sbc_analyze_4_mmx
void ff_sbc_analyze_4_mmx(const int16_t *in, int32_t *out, const int16_t *consts)
ff_sbc_calc_scalefactors_mmx
void ff_sbc_calc_scalefactors_mmx(int32_t sb_sample_f[16][2][8], uint32_t scale_factor[2][8], int blocks, int channels, int subbands)
cpu.h
attributes.h
ff_sbc_analyze_8_mmx
void ff_sbc_analyze_8_mmx(const int16_t *in, int32_t *out, const int16_t *consts)
int32_t
int32_t
Definition:
audioconvert.c:56
ff_sbcdsp_init_x86
av_cold void ff_sbcdsp_init_x86(SBCDSPContext *s)
Definition:
sbcdsp_init.c:43
EXTERNAL_MMX
#define EXTERNAL_MMX(flags)
Definition:
cpu.h:56
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