1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/*
* Altivec optimized MP3 decoding functions
* Copyright (c) 2010 Vitor Sessak
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "dsputil_altivec.h"
#include "libavutil/attributes.h"
#include "libavutil/ppc/util_altivec.h"
#include "libavcodec/dsputil.h"
#include "libavcodec/mpegaudiodsp.h"
#define MACS(rt, ra, rb) rt+=(ra)*(rb)
#define MLSS(rt, ra, rb) rt-=(ra)*(rb)
#define SUM8(op, sum, w, p) \
{ \
op(sum, (w)[0 * 64], (p)[0 * 64]); \
op(sum, (w)[1 * 64], (p)[1 * 64]); \
op(sum, (w)[2 * 64], (p)[2 * 64]); \
op(sum, (w)[3 * 64], (p)[3 * 64]); \
op(sum, (w)[4 * 64], (p)[4 * 64]); \
op(sum, (w)[5 * 64], (p)[5 * 64]); \
op(sum, (w)[6 * 64], (p)[6 * 64]); \
op(sum, (w)[7 * 64], (p)[7 * 64]); \
}
static void apply_window(const float *buf, const float *win1,
const float *win2, float *sum1, float *sum2, int len)
{
const vector float *win1a = (const vector float *) win1;
const vector float *win2a = (const vector float *) win2;
const vector float *bufa = (const vector float *) buf;
vector float *sum1a = (vector float *) sum1;
vector float *sum2a = (vector float *) sum2;
vector float av_uninit(v0), av_uninit(v4);
vector float v1, v2, v3;
len = len >> 2;
#define MULT(a, b) \
{ \
v1 = vec_ld(a, win1a); \
v2 = vec_ld(b, win2a); \
v3 = vec_ld(a, bufa); \
v0 = vec_madd(v3, v1, v0); \
v4 = vec_madd(v2, v3, v4); \
}
while (len--) {
v0 = vec_xor(v0, v0);
v4 = vec_xor(v4, v4);
MULT( 0, 0);
MULT( 256, 64);
MULT( 512, 128);
MULT( 768, 192);
MULT(1024, 256);
MULT(1280, 320);
MULT(1536, 384);
MULT(1792, 448);
vec_st(v0, 0, sum1a);
vec_st(v4, 0, sum2a);
sum1a++;
sum2a++;
win1a++;
win2a++;
bufa++;
}
}
static void apply_window_mp3(float *in, float *win, int *unused, float *out,
int incr)
{
LOCAL_ALIGNED_16(float, suma, [17]);
LOCAL_ALIGNED_16(float, sumb, [17]);
LOCAL_ALIGNED_16(float, sumc, [17]);
LOCAL_ALIGNED_16(float, sumd, [17]);
float sum;
int j;
float *out2 = out + 32 * incr;
/* copy to avoid wrap */
memcpy(in + 512, in, 32 * sizeof(*in));
apply_window(in + 16, win , win + 512, suma, sumc, 16);
apply_window(in + 32, win + 48, win + 640, sumb, sumd, 16);
SUM8(MLSS, suma[0], win + 32, in + 48);
sumc[ 0] = 0;
sumb[16] = 0;
sumd[16] = 0;
out[0 ] = suma[ 0];
out += incr;
out2 -= incr;
for(j=1;j<16;j++) {
*out = suma[ j] - sumd[16-j];
*out2 = -sumb[16-j] - sumc[ j];
out += incr;
out2 -= incr;
}
sum = 0;
SUM8(MLSS, sum, win + 16 + 32, in + 32);
*out = sum;
}
av_cold void ff_mpadsp_init_altivec(MPADSPContext *s)
{
s->apply_window_float = apply_window_mp3;
}
|
