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libavcodec
ppc
audiodsp.c
Go to the documentation of this file.
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/*
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* Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.org>
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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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* miscellaneous audio operations
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*/
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#include "
config.h
"
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#if HAVE_ALTIVEC_H
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#include <altivec.h>
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#endif
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#include "
libavutil/attributes.h
"
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#include "
libavutil/cpu.h
"
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#include "
libavutil/ppc/cpu.h
"
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#include "
libavutil/ppc/types_altivec.h
"
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#include "
libavutil/ppc/util_altivec.h
"
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#include "
libavcodec/audiodsp.h
"
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#if HAVE_ALTIVEC
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static
int32_t
scalarproduct_int16_altivec(
const
int16_t *v1,
const
int16_t *v2,
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int
order)
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{
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int
i;
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LOAD_ZERO
;
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register
vec_s16
vec1;
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register
vec_s32
res = vec_splat_s32(0), t;
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int32_t
ires;
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for
(i = 0; i < order; i += 8) {
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vec1 = vec_unaligned_load(v1);
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t = vec_msum(vec1, vec_ld(0, v2),
zero_s32v
);
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res = vec_sums(t, res);
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v1 += 8;
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v2 += 8;
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}
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res = vec_splat(res, 3);
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vec_ste(res, 0, &ires);
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return
ires;
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}
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#endif
/* HAVE_ALTIVEC */
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av_cold
void
ff_audiodsp_init_ppc
(
AudioDSPContext
*
c
)
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{
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#if HAVE_ALTIVEC
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if
(!
PPC_ALTIVEC
(
av_get_cpu_flags
()))
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return
;
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c->
scalarproduct_int16
= scalarproduct_int16_altivec;
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#endif
/* HAVE_ALTIVEC */
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}
zero_s32v
#define zero_s32v
Definition:
types_altivec.h:45
cpu.h
AudioDSPContext::scalarproduct_int16
int32_t(* scalarproduct_int16)(const int16_t *v1, const int16_t *v2, int len)
Calculate scalar product of two vectors.
Definition:
audiodsp.h:29
vec_s32
#define vec_s32
Definition:
types_altivec.h:32
attributes.h
Macro definitions for various function/variable attributes.
config.h
av_cold
#define av_cold
Definition:
attributes.h:74
vec_s16
#define vec_s16
Definition:
types_altivec.h:30
PPC_ALTIVEC
#define PPC_ALTIVEC(flags)
Definition:
cpu.h:26
LOAD_ZERO
#define LOAD_ZERO
Definition:
types_altivec.h:38
ff_audiodsp_init_ppc
av_cold void ff_audiodsp_init_ppc(AudioDSPContext *c)
Definition:
audiodsp.c:64
int32_t
int32_t
Definition:
audio_convert.c:194
audiodsp.h
types_altivec.h
cpu.h
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition:
cpu.c:76
util_altivec.h
Contains misc utility macros and inline functions.
c
static double c[64]
Definition:
vsrc_mptestsrc.c:87
AudioDSPContext
Definition:
audiodsp.h:24
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