73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/*
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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 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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/**
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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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}
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