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
|
/*
Copyright (c) 2004-2009, John Hurst
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. The name of the author may not be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*! \file AS_DCP.cpp
\version $Id: AS_DCP.cpp,v 1.6 2009/04/09 19:16:49 msheby Exp $
\brief AS-DCP library, misc classes and subroutines
*/
#include "AS_DCP_internal.h"
#include <assert.h>
const char*
ASDCP::Version()
{
return PACKAGE_VERSION;
}
//------------------------------------------------------------------------------------------
//
// frame buffer base class implementation
ASDCP::FrameBuffer::FrameBuffer() :
m_Data(0), m_Capacity(0), m_OwnMem(false), m_Size(0),
m_FrameNumber(0), m_SourceLength(0), m_PlaintextOffset(0)
{
}
ASDCP::FrameBuffer::~FrameBuffer()
{
if ( m_OwnMem && m_Data != 0 )
free(m_Data);
}
// Instructs the object to use an externally allocated buffer. The external
// buffer will not be cleaned up by the frame buffer when it is destroyed.
// Call with (0,0) to revert to internally allocated buffer.
// Returns error if the buf_addr argument is NULL and either buf_size is
// non-zero or internally allocated memory is in use.
ASDCP::Result_t
ASDCP::FrameBuffer::SetData(byte_t* buf_addr, ui32_t buf_size)
{
// if buf_addr is null and we have an external memory reference,
// drop the reference and place the object in the initialized-
// but-no-buffer-allocated state
if ( buf_addr == 0 )
{
if ( buf_size > 0 || m_OwnMem )
return RESULT_PTR;
m_OwnMem = false;
m_Capacity = m_Size = 0;
m_Data = 0;
return RESULT_OK;
}
if ( m_OwnMem && m_Data != 0 )
free(m_Data);
m_OwnMem = false;
m_Capacity = buf_size;
m_Data = buf_addr;
m_Size = 0;
return RESULT_OK;
}
// Sets the size of the internally allocate buffer. Returns RESULT_CAPEXTMEM
// if the object is using an externally allocated buffer via SetData();
// Resets content size to zero.
ASDCP::Result_t
ASDCP::FrameBuffer::Capacity(ui32_t cap_size)
{
if ( ! m_OwnMem && m_Data != 0 )
return RESULT_CAPEXTMEM; // cannot resize external memory
if ( m_Capacity < cap_size )
{
if ( m_Data != 0 )
{
assert(m_OwnMem);
free(m_Data);
}
m_Data = (byte_t*)malloc(cap_size);
if ( m_Data == 0 )
return RESULT_ALLOC;
m_Capacity = cap_size;
m_OwnMem = true;
m_Size = 0;
}
return RESULT_OK;
}
//
// end AS_DCP.cpp
//
|
