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libavcodec
ppc
vorbisdsp_altivec.c
Go to the documentation of this file.
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/*
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* Copyright (c) 2006 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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#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 "
libavcodec/vorbisdsp.h
"
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#if HAVE_ALTIVEC
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static
void
vorbis_inverse_coupling_altivec(
float
*mag,
float
*ang,
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intptr_t blocksize)
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{
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int
i;
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vector
float
m
,
a
;
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vector
bool
int
t0
,
t1
;
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const
vector
unsigned
int
v_31 =
//XXX
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vec_add(vec_add(vec_splat_u32(15),vec_splat_u32(15)),vec_splat_u32(1));
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for
(i = 0; i < blocksize; i += 4) {
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m = vec_ld(0, mag+i);
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a = vec_ld(0, ang+i);
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t0 = vec_cmple(m, (vector
float
)vec_splat_u32(0));
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t1 = vec_cmple(a, (vector
float
)vec_splat_u32(0));
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a = vec_xor(a, (vector
float
) vec_sl((vector
unsigned
int
)t0, v_31));
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t0 = (vector
bool
int)vec_and(a, t1);
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t1 = (vector
bool
int)vec_andc(a, t1);
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a = vec_sub(m, (vector
float
)t1);
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m = vec_add(m, (vector
float
)t0);
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vec_stl(a, 0, ang+i);
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vec_stl(m, 0, mag+i);
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}
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}
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#endif
/* HAVE_ALTIVEC */
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av_cold
void
ff_vorbisdsp_init_ppc
(
VorbisDSPContext
*
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->
vorbis_inverse_coupling
= vorbis_inverse_coupling_altivec;
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#endif
/* HAVE_ALTIVEC */
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}
cpu.h
VorbisDSPContext::vorbis_inverse_coupling
void(* vorbis_inverse_coupling)(float *mag, float *ang, intptr_t blocksize)
Definition:
vorbisdsp.h:26
attributes.h
Macro definitions for various function/variable attributes.
av_cold
#define av_cold
Definition:
attributes.h:74
t0
#define t0
Definition:
regdef.h:28
m
unsigned m
Definition:
audioconvert.c:187
VorbisDSPContext
Definition:
vorbisdsp.h:24
ff_vorbisdsp_init_ppc
av_cold void ff_vorbisdsp_init_ppc(VorbisDSPContext *c)
Definition:
vorbisdsp_altivec.c:55
PPC_ALTIVEC
#define PPC_ALTIVEC(flags)
Definition:
cpu.h:26
t1
#define t1
Definition:
regdef.h:29
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
c
static double c[64]
Definition:
vsrc_mptestsrc.c:87
vorbisdsp.h
a
a
Definition:
h264pred_template.c:468
Generated on Wed Jul 8 2020 07:31:58 for FFmpeg by
1.8.8