Imported Debian version 2.5.0~trusty1.1
[deb_ffmpeg.git] / ffmpeg / libavcodec / ppc / audiodsp.c
CommitLineData
2ba45a60
DM
1/*
2 * Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.org>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21/**
22 * @file
23 * miscellaneous audio operations
24 */
25
26#include "config.h"
27#if HAVE_ALTIVEC_H
28#include <altivec.h>
29#endif
30
31#include "libavutil/attributes.h"
32#include "libavutil/cpu.h"
33#include "libavutil/ppc/cpu.h"
34#include "libavutil/ppc/types_altivec.h"
35#include "libavutil/ppc/util_altivec.h"
36#include "libavcodec/audiodsp.h"
37
38#if HAVE_ALTIVEC
39
40static int32_t scalarproduct_int16_altivec(const int16_t *v1, const int16_t *v2,
41 int order)
42{
43 int i;
44 LOAD_ZERO;
45 register vec_s16 vec1;
46 register vec_s32 res = vec_splat_s32(0), t;
47 int32_t ires;
48
49 for (i = 0; i < order; i += 8) {
50 vec1 = vec_unaligned_load(v1);
51 t = vec_msum(vec1, vec_ld(0, v2), zero_s32v);
52 res = vec_sums(t, res);
53 v1 += 8;
54 v2 += 8;
55 }
56 res = vec_splat(res, 3);
57 vec_ste(res, 0, &ires);
58
59 return ires;
60}
61
62#endif /* HAVE_ALTIVEC */
63
64av_cold void ff_audiodsp_init_ppc(AudioDSPContext *c)
65{
66#if HAVE_ALTIVEC
67 if (!PPC_ALTIVEC(av_get_cpu_flags()))
68 return;
69
70 c->scalarproduct_int16 = scalarproduct_int16_altivec;
71#endif /* HAVE_ALTIVEC */
72}