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audiodsp.c
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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 
28 #include "libavutil/attributes.h"
29 #include "libavutil/cpu.h"
30 #include "libavutil/ppc/cpu.h"
32 
33 #include "libavcodec/audiodsp.h"
34 
35 #if HAVE_ALTIVEC
36 
37 static int32_t scalarproduct_int16_altivec(const int16_t *v1, const int16_t *v2,
38  int order)
39 {
40  int i;
41  LOAD_ZERO;
42  register vec_s16 vec1;
43  register vec_s32 res = vec_splat_s32(0), t;
44  int32_t ires;
45 
46  for (i = 0; i < order; i += 8) {
47  vec1 = vec_unaligned_load(v1);
48  t = vec_msum(vec1, vec_ld(0, v2), zero_s32v);
49  res = vec_sums(t, res);
50  v1 += 8;
51  v2 += 8;
52  }
53  res = vec_splat(res, 3);
54  vec_ste(res, 0, &ires);
55 
56  return ires;
57 }
58 
59 #endif /* HAVE_ALTIVEC */
60 
61 #if HAVE_VSX
62 
63 static int32_t scalarproduct_int16_vsx(const int16_t *v1, const int16_t *v2, int order)
64 {
65  int i;
66  LOAD_ZERO;
67  register vec_s16 vec1;
68  register vec_s32 res = vec_splat_s32(0), t;
69  int32_t ires;
70 
71  for (i = 0; i < order; i += 8) {
72  vec1 = vec_vsx_ld(0, v1);
73  t = vec_msum(vec1, vec_ld(0, v2), zero_s32v);
74  res = vec_sums(t, res);
75  v1 += 8;
76  v2 += 8;
77  }
78  res = vec_splat(res, 3);
79  vec_ste(res, 0, &ires);
80 
81  return ires;
82 }
83 
84 #endif /* HAVE_VSX */
85 
87 {
88 #if HAVE_ALTIVEC
90  return;
91 
92  c->scalarproduct_int16 = scalarproduct_int16_altivec;
93 #endif /* HAVE_ALTIVEC */
94 
95 #if HAVE_VSX
96  if (!PPC_VSX(av_get_cpu_flags()))
97  return;
98 
99  c->scalarproduct_int16 = scalarproduct_int16_vsx;
100 #endif /* HAVE_VSX */
101 }
#define PPC_VSX(flags)
Definition: cpu.h:27
int32_t(* scalarproduct_int16)(const int16_t *v1, const int16_t *v2, int len)
Calculate scalar product of two vectors.
Definition: audiodsp.h:29
#define vec_s32
Definition: util_altivec.h:39
#define LOAD_ZERO
Definition: util_altivec.h:45
#define zero_s32v
Definition: util_altivec.h:52
Macro definitions for various function/variable attributes.
#define av_cold
Definition: attributes.h:82
av_cold void ff_audiodsp_init_ppc(AudioDSPContext *c)
Definition: audiodsp.c:86
#define vec_s16
Definition: util_altivec.h:37
#define PPC_ALTIVEC(flags)
Definition: cpu.h:26
int32_t
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:92
Contains misc utility macros and inline functions.
static double c[64]