| /* |
| * 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 */ |
| } |