/* * Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.org> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * miscellaneous audio operations */ #include "config.h" #if HAVE_ALTIVEC_H #include <altivec.h> #endif #include "libavutil/attributes.h" #include "libavutil/cpu.h" #include "libavutil/ppc/cpu.h" #include "libavutil/ppc/types_altivec.h" #include "libavutil/ppc/util_altivec.h" #include "libavcodec/audiodsp.h" #if HAVE_ALTIVEC static int32_t scalarproduct_int16_altivec(const int16_t *v1, const int16_t *v2, int order) { int i; LOAD_ZERO; register vec_s16 vec1; register vec_s32 res = vec_splat_s32(0), t; int32_t ires; for (i = 0; i < order; i += 8) { vec1 = vec_unaligned_load(v1); t = vec_msum(vec1, vec_ld(0, v2), zero_s32v); res = vec_sums(t, res); v1 += 8; v2 += 8; } res = vec_splat(res, 3); vec_ste(res, 0, &ires); return ires; } #endif /* HAVE_ALTIVEC */ av_cold void ff_audiodsp_init_ppc(AudioDSPContext *c) { #if HAVE_ALTIVEC if (!PPC_ALTIVEC(av_get_cpu_flags())) return; c->scalarproduct_int16 = scalarproduct_int16_altivec; #endif /* HAVE_ALTIVEC */ }