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
|
/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-runtime-lib
* Created on: 21 авг. 2019 г.
*
* lsp-runtime-lib 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 3 of the License, or
* any later version.
*
* lsp-runtime-lib 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 lsp-runtime-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_IO_INMEMORYSTREAM_H_
#define LSP_PLUG_IN_IO_INMEMORYSTREAM_H_
#include <lsp-plug.in/runtime/version.h>
#include <lsp-plug.in/io/IInStream.h>
namespace lsp
{
namespace io
{
class InMemoryStream: public IInStream
{
protected:
uint8_t *pData;
size_t nOffset;
size_t nSize;
lsp_memdrop_t enDrop;
public:
explicit InMemoryStream();
/**
* Create memory input stream
* @param data associated buffer
* @param size size of buffer
*/
explicit InMemoryStream(const void *data, size_t size);
/**
* Create memory input stream
* @param data associated buffer
* @param size size of buffer
* @param drop the method how to drop data on close()
*/
explicit InMemoryStream(void *data, size_t size, lsp_memdrop_t drop);
virtual ~InMemoryStream();
public:
/**
* Wrap the memory buffer, drop previous buffer using specified mechanism
* @param data associated buffer
* @param size size of buffer
* @param drop the method how to drop data on close()
*/
void wrap(void *data, size_t size, lsp_memdrop_t drop);
/**
* Wrap the memory buffer, drop previous buffer using specified mechanism
* @param data associated buffer
* @param size size of buffer
* @param drop the method how to drop data on close()
*/
void wrap(const void *data, size_t size);
/**
* Get the memory contents
* @return memory contents
*/
inline const uint8_t *data() const { return pData; }
/**
* Drop data using specified drop mechanism
* @return true if data has been dropped
*/
bool drop(lsp_memdrop_t drop);
/**
* Drop data using default mechanism specified in constructor
* @return true if data has been dropped
*/
inline bool drop() { return drop(enDrop); };
/**
* Obtain the size of memory buffer wrapped by the memory stream
* @return the size of memory buffer in bytes
*/
inline size_t size() const { return nSize; }
public:
virtual wssize_t avail();
virtual wssize_t position();
virtual ssize_t read(void *dst, size_t count);
virtual wssize_t seek(wsize_t position);
virtual wssize_t skip(wsize_t amount);
virtual status_t close();
};
} /* namespace io */
} /* namespace lsp */
#endif /* LSP_PLUG_IN_IO_INMEMORYSTREAM_H_ */
|
