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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/*
* Copyright (C) 2009 David Conrad
*
* 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 <string.h>
#include "config.h"
#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/vp3dsp.h"
#if HAVE_ALTIVEC && HAVE_BIGENDIAN
static const vec_s16 constants =
{0, 64277, 60547, 54491, 46341, 36410, 25080, 12785};
static const vec_u8 interleave_high =
{0, 1, 16, 17, 4, 5, 20, 21, 8, 9, 24, 25, 12, 13, 28, 29};
#define IDCT_START \
vec_s16 A, B, C, D, Ad, Bd, Cd, Dd, E, F, G, H;\
vec_s16 Ed, Gd, Add, Bdd, Fd, Hd;\
vec_s16 eight = vec_splat_s16(8);\
vec_u16 four = vec_splat_u16(4);\
\
vec_s16 C1 = vec_splat(constants, 1);\
vec_s16 C2 = vec_splat(constants, 2);\
vec_s16 C3 = vec_splat(constants, 3);\
vec_s16 C4 = vec_splat(constants, 4);\
vec_s16 C5 = vec_splat(constants, 5);\
vec_s16 C6 = vec_splat(constants, 6);\
vec_s16 C7 = vec_splat(constants, 7);\
\
vec_s16 b0 = vec_ld(0x00, block);\
vec_s16 b1 = vec_ld(0x10, block);\
vec_s16 b2 = vec_ld(0x20, block);\
vec_s16 b3 = vec_ld(0x30, block);\
vec_s16 b4 = vec_ld(0x40, block);\
vec_s16 b5 = vec_ld(0x50, block);\
vec_s16 b6 = vec_ld(0x60, block);\
vec_s16 b7 = vec_ld(0x70, block);
// these functions do (a*C)>>16
// things are tricky because a is signed, but C unsigned.
// M15 is used if C fits in 15 bit unsigned (C6,C7)
// M16 is used if C requires 16 bits unsigned
static inline vec_s16 M15(vec_s16 a, vec_s16 C)
{
return (vec_s16)vec_perm(vec_mule(a,C), vec_mulo(a,C), interleave_high);
}
static inline vec_s16 M16(vec_s16 a, vec_s16 C)
{
return vec_add(a, M15(a, C));
}
#define IDCT_1D(ADD, SHIFT)\
A = vec_add(M16(b1, C1), M15(b7, C7));\
B = vec_sub(M15(b1, C7), M16(b7, C1));\
C = vec_add(M16(b3, C3), M16(b5, C5));\
D = vec_sub(M16(b5, C3), M16(b3, C5));\
\
Ad = M16(vec_sub(A, C), C4);\
Bd = M16(vec_sub(B, D), C4);\
\
Cd = vec_add(A, C);\
Dd = vec_add(B, D);\
\
E = ADD(M16(vec_add(b0, b4), C4));\
F = ADD(M16(vec_sub(b0, b4), C4));\
\
G = vec_add(M16(b2, C2), M15(b6, C6));\
H = vec_sub(M15(b2, C6), M16(b6, C2));\
\
Ed = vec_sub(E, G);\
Gd = vec_add(E, G);\
\
Add = vec_add(F, Ad);\
Bdd = vec_sub(Bd, H);\
\
Fd = vec_sub(F, Ad);\
Hd = vec_add(Bd, H);\
\
b0 = SHIFT(vec_add(Gd, Cd));\
b7 = SHIFT(vec_sub(Gd, Cd));\
\
b1 = SHIFT(vec_add(Add, Hd));\
b2 = SHIFT(vec_sub(Add, Hd));\
\
b3 = SHIFT(vec_add(Ed, Dd));\
b4 = SHIFT(vec_sub(Ed, Dd));\
\
b5 = SHIFT(vec_add(Fd, Bdd));\
b6 = SHIFT(vec_sub(Fd, Bdd));
#define NOP(a) a
#define ADD8(a) vec_add(a, eight)
#define SHIFT4(a) vec_sra(a, four)
static void vp3_idct_put_altivec(uint8_t *dst, int stride, int16_t block[64])
{
vec_u8 t;
IDCT_START
// pixels are signed; so add 128*16 in addition to the normal 8
vec_s16 v2048 = vec_sl(vec_splat_s16(1), vec_splat_u16(11));
eight = vec_add(eight, v2048);
IDCT_1D(NOP, NOP)
TRANSPOSE8(b0, b1, b2, b3, b4, b5, b6, b7);
IDCT_1D(ADD8, SHIFT4)
#define PUT(a)\
t = vec_packsu(a, a);\
vec_ste((vec_u32)t, 0, (unsigned int *)dst);\
vec_ste((vec_u32)t, 4, (unsigned int *)dst);
PUT(b0) dst += stride;
PUT(b1) dst += stride;
PUT(b2) dst += stride;
PUT(b3) dst += stride;
PUT(b4) dst += stride;
PUT(b5) dst += stride;
PUT(b6) dst += stride;
PUT(b7)
memset(block, 0, sizeof(*block) * 64);
}
static void vp3_idct_add_altivec(uint8_t *dst, int stride, int16_t block[64])
{
LOAD_ZERO;
vec_u8 t, vdst;
vec_s16 vdst_16;
vec_u8 vdst_mask = vec_mergeh(vec_splat_u8(-1), vec_lvsl(0, dst));
IDCT_START
IDCT_1D(NOP, NOP)
TRANSPOSE8(b0, b1, b2, b3, b4, b5, b6, b7);
IDCT_1D(ADD8, SHIFT4)
#define ADD(a)\
vdst = vec_ld(0, dst);\
vdst_16 = (vec_s16)vec_perm(vdst, zero_u8v, vdst_mask);\
vdst_16 = vec_adds(a, vdst_16);\
t = vec_packsu(vdst_16, vdst_16);\
vec_ste((vec_u32)t, 0, (unsigned int *)dst);\
vec_ste((vec_u32)t, 4, (unsigned int *)dst);
ADD(b0) dst += stride;
ADD(b1) dst += stride;
ADD(b2) dst += stride;
ADD(b3) dst += stride;
ADD(b4) dst += stride;
ADD(b5) dst += stride;
ADD(b6) dst += stride;
ADD(b7)
memset(block, 0, sizeof(*block) * 64);
}
#endif /* HAVE_ALTIVEC */
av_cold void ff_vp3dsp_init_ppc(VP3DSPContext *c, int flags)
{
#if HAVE_ALTIVEC && HAVE_BIGENDIAN
if (!PPC_ALTIVEC(av_get_cpu_flags()))
return;
c->idct_put = vp3_idct_put_altivec;
c->idct_add = vp3_idct_add_altivec;
#endif
}
|
