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
|
/*
* 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: 24 апр. 2020 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 PRIVATE_MM_MMIOREADER_H_
#define PRIVATE_MM_MMIOREADER_H_
#include <lsp-plug.in/runtime/version.h>
#ifndef USE_LIBSNDFILE
#include <lsp-plug.in/common/types.h>
#include <lsp-plug.in/common/status.h>
#include <lsp-plug.in/runtime/LSPString.h>
#include <windows.h>
#include <mmsystem.h>
#include <mmreg.h>
namespace lsp
{
namespace mm
{
/**
* Audio file reader using MMIO subsystem
*/
class MMIOReader
{
private:
MMIOReader & operator = (const MMIOReader &);
protected:
HMMIO hMMIO;
wsize_t nReadPos;
wssize_t nFrames;
bool bSeekable;
WAVEFORMATEX *pFormat;
MMCKINFO ckRiff;
MMCKINFO ckData;
public:
explicit MMIOReader();
~MMIOReader();
public:
/**
* Check whether reader is seekable
* @return true if reader is seekable
*/
inline bool seekable() const { return bSeekable; }
/**
* Get input format descriptor
* @return input format descriptor
*/
inline WAVEFORMATEX *format() { return pFormat; }
/**
* Get actual number of frames
* @return number of frames or negative value if length is unknown
*/
inline wssize_t frames() const { return nFrames; }
/**
* Open audio file for reading
* @param path path to the file
* @return status of operation
*/
status_t open(const LSPString *path);
/**
* Seek to the specified location
* @param offset offset in bytes from the beginning of data chunk
* @return actual offset in bytes from the beginning of data chunk
*/
wssize_t seek(wsize_t offset);
/**
* Read number of bytes into buffer
* @param buf pointer to buffer to store data
* @param count number of bytes to read
* @return actual bytes read or negative error code
*/
ssize_t read(void *buf, size_t count);
/**
* Close the file
* @return status of operation
*/
status_t close(status_t code = STATUS_OK);
};
} /* namespace mm */
} /* namespace lsp */
#endif /* USE_LIBSNDFILE */
#endif /* PRIVATE_MM_MMIOREADER_H_ */
|
