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
190
191
192
193
194
195
196
197
198
199
|
/**
* @file llkdumem.cpp
* @brief Helper class for kdu memory management
*
* $LicenseInfo:firstyear=2010&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library 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;
* version 2.1 of the License only.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#include "linden_common.h"
#include "llkdumem.h"
#include "llerror.h"
using namespace kdu_core;
using kd_supp_image_local::image_line_buf;
#if defined(LL_WINDOWS)
# pragma warning(disable: 4702) // unreachable code
#endif
LLKDUMemIn::LLKDUMemIn(const U8 *data,
const U32 size,
const U16 width,
const U16 height,
const U8 in_num_components,
siz_params *siz)
{
U8 n;
first_comp_idx = 0;
rows = height;
cols = width;
num_components = in_num_components;
alignment_bytes = 0;
for (n = 0; n < 3; ++n)
{
precision[n] = 0;
}
for (n = 0; n < num_components; ++n)
{
siz->set(Sdims,n,0,rows);
siz->set(Sdims,n,1,cols);
siz->set(Ssigned,n,0,false);
siz->set(Sprecision,n,0,8);
}
incomplete_lines = NULL;
free_lines = NULL;
num_unread_rows = rows;
mData = data;
mDataSize = size;
mCurPos = 0;
}
LLKDUMemIn::~LLKDUMemIn()
{
if ((num_unread_rows > 0) || (incomplete_lines != NULL))
{
kdu_warning w;
w << "Not all rows of image components "
<< first_comp_idx << " through "
<< first_comp_idx+num_components-1
<< " were consumed!";
}
image_line_buf *tmp;
while ((tmp=incomplete_lines) != NULL)
{
incomplete_lines = tmp->next;
delete tmp;
}
while ((tmp=free_lines) != NULL)
{
free_lines = tmp->next;
delete tmp;
}
}
bool LLKDUMemIn::get(int comp_idx, kdu_line_buf &line, int x_tnum)
{
int idx = comp_idx - this->first_comp_idx;
assert((idx >= 0) && (idx < num_components));
x_tnum = x_tnum*num_components+idx;
image_line_buf *scan, *prev=NULL;
for (scan = incomplete_lines; scan != NULL; prev = scan, scan = scan->next)
{
assert(scan->next_x_tnum >= x_tnum);
if (scan->next_x_tnum == x_tnum)
{
break;
}
}
if (scan == NULL)
{ // Need to read a new image line.
assert(x_tnum == 0); // Must consume in very specific order.
if (num_unread_rows == 0)
{
return false;
}
if ((scan = free_lines) == NULL)
{
scan = new image_line_buf(cols+3,num_components);
}
free_lines = scan->next;
if (prev == NULL)
{
incomplete_lines = scan;
}
else
{
prev->next = scan;
}
// Copy from image buffer into scan.
memcpy(scan->buf, mData+mCurPos, cols*num_components);
mCurPos += cols*num_components;
num_unread_rows--;
scan->accessed_samples = 0;
scan->next_x_tnum = 0;
}
assert((cols-scan->accessed_samples) >= line.get_width());
int comp_offset = idx;
kdu_byte *sp = scan->buf+num_components*scan->accessed_samples + comp_offset;
int n=line.get_width();
if (line.get_buf32() != NULL)
{
kdu_sample32 *dp = line.get_buf32();
if (line.is_absolute())
{ // 32-bit absolute integers
for (; n > 0; n--, sp+=num_components, dp++)
{
dp->ival = ((kdu_int32)(*sp)) - 128;
}
}
else
{ // true 32-bit floats
for (; n > 0; n--, sp+=num_components, dp++)
{
dp->fval = (((float)(*sp)) / 256.0F) - 0.5F;
}
}
}
else
{
kdu_sample16 *dp = line.get_buf16();
if (line.is_absolute())
{ // 16-bit absolute integers
for (; n > 0; n--, sp+=num_components, dp++)
{
dp->ival = ((kdu_int16)(*sp)) - 128;
}
}
else
{ // 16-bit normalized representation.
for (; n > 0; n--, sp+=num_components, dp++)
{
dp->ival = (((kdu_int16)(*sp)) - 128) << (KDU_FIX_POINT-8);
}
}
}
scan->next_x_tnum++;
if (idx == (num_components-1))
{
scan->accessed_samples += line.get_width();
}
if (scan->accessed_samples == cols)
{ // Send empty line to free list.
assert(scan == incomplete_lines);
incomplete_lines = scan->next;
scan->next = free_lines;
free_lines = scan;
}
return true;
}
|
