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libavcodec
ppc
huffyuvdsp_altivec.c
Go to the documentation of this file.
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/*
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* Copyright (c) 2002 Brian Foley
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* Copyright (c) 2002 Dieter Shirley
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* Copyright (c) 2003-2004 Romain Dolbeau <romain@dolbeau.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 "
libavutil/ppc/types_altivec.h
"
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#include "
libavutil/ppc/util_altivec.h
"
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#include "
libavcodec/huffyuvdsp.h
"
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#if HAVE_ALTIVEC
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static
void
add_bytes_altivec(
uint8_t
*dst,
uint8_t
*
src
, intptr_t w)
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{
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register
int
i;
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register
vector
unsigned
char
vdst, vsrc;
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/* dst and src are 16 bytes-aligned (guaranteed). */
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for
(i = 0; i + 15 < w; i += 16) {
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vdst = vec_ld(i, (
unsigned
char
*) dst);
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vsrc = vec_ld(i, (
unsigned
char
*) src);
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vdst = vec_add(vsrc, vdst);
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vec_st(vdst, i, (
unsigned
char
*) dst);
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}
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/* If w is not a multiple of 16. */
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for
(; i < w; i++)
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dst[i] = src[i];
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}
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#endif
/* HAVE_ALTIVEC */
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av_cold
void
ff_huffyuvdsp_init_ppc
(
HuffYUVDSPContext
*
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->
add_bytes
= add_bytes_altivec;
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#endif
/* HAVE_ALTIVEC */
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}
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