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
|
//=============================================================================
// MuseScore
// Music Composition & Notation
//
// Copyright (C) 2007-2011 Werner Schweer
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2
// as published by the Free Software Foundation and appearing in
// the file LICENCE.GPL
//=============================================================================
#include "audiofile.h"
static sf_count_t getFileLen(void* f) {
return ((AudioFile*)f)->getFileLen();
}
static sf_count_t seek(sf_count_t offset, int whence, void* f) {
return ((AudioFile*)f)->seek(offset, whence);
}
static sf_count_t read(void* ptr, sf_count_t count, void* f) {
return ((AudioFile*)f)->read(ptr, count);
}
static sf_count_t write(const void* ptr, sf_count_t count, void* f) {
return ((AudioFile*)f)->write(ptr, count);
}
static sf_count_t tell(void* f) {
return ((AudioFile*)f)->tell();
}
static SF_VIRTUAL_IO sfio = {
getFileLen,
seek,
read,
write,
tell
};
//---------------------------------------------------------
// AudioFile
//---------------------------------------------------------
AudioFile::AudioFile()
{
memset(&info, 0, sizeof(info));
sf = 0;
}
AudioFile::~AudioFile()
{
if (sf)
sf_close(sf);
}
//---------------------------------------------------------
// open
//---------------------------------------------------------
bool AudioFile::open(const QByteArray& b)
{
buf = b;
idx = 0;
sf = sf_open_virtual(&sfio, SFM_READ, &info, this);
return sf != 0;
}
//---------------------------------------------------------
// read
//---------------------------------------------------------
int AudioFile::read(short* data, int frames)
{
return sf_readf_short(sf, data, frames);
}
//---------------------------------------------------------
// seek
//---------------------------------------------------------
sf_count_t AudioFile::seek(sf_count_t offset, int whence)
{
switch(whence) {
case SEEK_SET:
idx = offset;
break;
case SEEK_CUR:
idx += offset;
break;
case SEEK_END:
idx = buf.size() + offset;
break;
}
return idx;
}
//---------------------------------------------------------
// read
//---------------------------------------------------------
sf_count_t AudioFile::read(void* ptr, sf_count_t count)
{
count = qMin(count, (sf_count_t)(buf.size() - idx));
memcpy(ptr, buf.data() + idx, count);
idx += count;
return count;
}
//---------------------------------------------------------
// write
//---------------------------------------------------------
sf_count_t AudioFile::write(const void* /*ptr*/, sf_count_t /*count*/)
{
printf("write\n");
return 0;
}
|
