1 /*
2 OpenCV for Android NDK
3 Copyright (c) 2006-2009 SIProp Project http://www.siprop.org/
4
5 This software is provided 'as-is', without any express or implied warranty.
6 In no event will the authors be held liable for any damages arising from the use of this software.
7 Permission is granted to anyone to use this software for any purpose,
8 including commercial applications, and to alter it and redistribute it freely,
9 subject to the following restrictions:
10
11 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
12 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
13 3. This notice may not be removed or altered from any source distribution.
14 */
15 #include "WLNonFileByteStream.h"
16
17 ///////////////////////////// WLNonFileByteStream ///////////////////////////////////
18
WLNonFileByteStream()19 WLNonFileByteStream::WLNonFileByteStream()
20 {
21 m_start = m_end = m_current = 0;
22 _size = 0;
23 m_is_opened = false;
24 }
25
26
~WLNonFileByteStream()27 WLNonFileByteStream::~WLNonFileByteStream()
28 {
29 Deallocate();
30 }
31
32
Allocate(int data_size)33 void WLNonFileByteStream::Allocate(int data_size)
34 {
35 if(!m_start)
36 m_start = new uchar[data_size];
37
38 m_end = m_start + data_size;
39 m_current = m_start;
40 }
41
Deallocate()42 void WLNonFileByteStream::Deallocate()
43 {
44 if(m_start)
45 {
46 delete [] m_start;
47 m_start = 0;
48 }
49 }
50
Open(int data_size)51 bool WLNonFileByteStream::Open(int data_size)
52 {
53 Close();
54 Allocate(data_size);
55
56 m_is_opened = true;
57 m_current = m_start;
58 _size = data_size;
59
60 return true;
61 }
62
63
Close()64 void WLNonFileByteStream::Close()
65 {
66 m_is_opened = false;
67 Deallocate();
68 }
69
70
PutByte(int val)71 void WLNonFileByteStream::PutByte( int val )
72 {
73 *m_current++ = (uchar)val;
74 }
75
76
PutBytes(const void * buffer,int count)77 void WLNonFileByteStream::PutBytes( const void* buffer, int count )
78 {
79 uchar* data = (uchar*)buffer;
80
81 assert( data && m_current && count >= 0 );
82
83 while( count )
84 {
85 int l = (int)(m_end - m_current);
86
87 if( l > count )
88 l = count;
89
90 if( l > 0 )
91 {
92 memcpy( m_current, data, l );
93 m_current += l;
94 data += l;
95 count -= l;
96 }
97 }
98 }
99
100
PutWord(int val)101 void WLNonFileByteStream::PutWord( int val )
102 {
103 uchar *current = m_current;
104
105 if( current+1 < m_end )
106 {
107 current[0] = (uchar)val;
108 current[1] = (uchar)(val >> 8);
109 m_current = current + 2;
110 }
111 else
112 {
113 PutByte(val);
114 PutByte(val >> 8);
115 }
116 }
117
118
PutDWord(int val)119 void WLNonFileByteStream::PutDWord( int val )
120 {
121 uchar *current = m_current;
122
123 if( current+3 < m_end )
124 {
125 current[0] = (uchar)val;
126 current[1] = (uchar)(val >> 8);
127 current[2] = (uchar)(val >> 16);
128 current[3] = (uchar)(val >> 24);
129 m_current = current + 4;
130 }
131 else
132 {
133 PutByte(val);
134 PutByte(val >> 8);
135 PutByte(val >> 16);
136 PutByte(val >> 24);
137 }
138 }
139
140
GetByte()141 uchar* WLNonFileByteStream::GetByte()
142 {
143 return m_start;
144 }
145
GetSize()146 int WLNonFileByteStream::GetSize()
147 {
148 return _size;
149 }
150
151