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
|
/*
* RV30/40 decoder common dsp functions
* Copyright (c) 2007 Mike Melanson, Konstantin Shishkov
* Copyright (c) 2011 Janne Grunau
*
* 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
*/
/**
* @file
* RV30/40 decoder common dsp functions
*/
#include "dsputil.h"
#include "rv34dsp.h"
/**
* @name RV30/40 inverse transform functions
* @{
*/
static av_always_inline void rv34_row_transform(int temp[16], DCTELEM *block)
{
int i;
for(i = 0; i < 4; i++){
const int z0 = 13*(block[i+4*0] + block[i+4*2]);
const int z1 = 13*(block[i+4*0] - block[i+4*2]);
const int z2 = 7* block[i+4*1] - 17*block[i+4*3];
const int z3 = 17* block[i+4*1] + 7*block[i+4*3];
temp[4*i+0] = z0 + z3;
temp[4*i+1] = z1 + z2;
temp[4*i+2] = z1 - z2;
temp[4*i+3] = z0 - z3;
}
}
/**
* Real Video 3.0/4.0 inverse transform + sample reconstruction
* Code is almost the same as in SVQ3, only scaling is different.
*/
static void rv34_idct_add_c(uint8_t *dst, int stride, DCTELEM *block){
int temp[16];
int i;
rv34_row_transform(temp, block);
memset(block, 0, 16*sizeof(DCTELEM));
for(i = 0; i < 4; i++){
const int z0 = 13*(temp[4*0+i] + temp[4*2+i]) + 0x200;
const int z1 = 13*(temp[4*0+i] - temp[4*2+i]) + 0x200;
const int z2 = 7* temp[4*1+i] - 17*temp[4*3+i];
const int z3 = 17* temp[4*1+i] + 7*temp[4*3+i];
dst[0] = av_clip_uint8( dst[0] + ( (z0 + z3) >> 10 ) );
dst[1] = av_clip_uint8( dst[1] + ( (z1 + z2) >> 10 ) );
dst[2] = av_clip_uint8( dst[2] + ( (z1 - z2) >> 10 ) );
dst[3] = av_clip_uint8( dst[3] + ( (z0 - z3) >> 10 ) );
dst += stride;
}
}
/**
* RealVideo 3.0/4.0 inverse transform for DC block
*
* Code is almost the same as rv34_inv_transform()
* but final coefficients are multiplied by 1.5 and have no rounding.
*/
static void rv34_inv_transform_noround_c(DCTELEM *block){
int temp[16];
int i;
rv34_row_transform(temp, block);
for(i = 0; i < 4; i++){
const int z0 = 13*(temp[4*0+i] + temp[4*2+i]);
const int z1 = 13*(temp[4*0+i] - temp[4*2+i]);
const int z2 = 7* temp[4*1+i] - 17*temp[4*3+i];
const int z3 = 17* temp[4*1+i] + 7*temp[4*3+i];
block[i*4+0] = ((z0 + z3) * 3) >> 11;
block[i*4+1] = ((z1 + z2) * 3) >> 11;
block[i*4+2] = ((z1 - z2) * 3) >> 11;
block[i*4+3] = ((z0 - z3) * 3) >> 11;
}
}
static void rv34_idct_dc_add_c(uint8_t *dst, int stride, int dc)
{
int i, j;
dc = (13*13*dc + 0x200) >> 10;
for (i = 0; i < 4; i++)
{
for (j = 0; j < 4; j++)
dst[j] = av_clip_uint8( dst[j] + dc );
dst += stride;
}
}
static void rv34_inv_transform_dc_noround_c(DCTELEM *block)
{
DCTELEM dc = (13 * 13 * 3 * block[0]) >> 11;
int i, j;
for (i = 0; i < 4; i++, block += 4)
for (j = 0; j < 4; j++)
block[j] = dc;
}
/** @} */ // transform
av_cold void ff_rv34dsp_init(RV34DSPContext *c, DSPContext* dsp) {
c->rv34_inv_transform = rv34_inv_transform_noround_c;
c->rv34_inv_transform_dc = rv34_inv_transform_dc_noround_c;
c->rv34_idct_add = rv34_idct_add_c;
c->rv34_idct_dc_add = rv34_idct_dc_add_c;
if (HAVE_NEON)
ff_rv34dsp_init_neon(c, dsp);
if (HAVE_MMX)
ff_rv34dsp_init_x86(c, dsp);
}
|
