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
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "glk/magnetic/magnetic.h"
namespace Glk {
namespace Magnetic {
byte Magnetic::init_snd(size_t size) {
if (!(snd_buf = new byte[MAX_MUSIC_SIZE])) {
return 1;
}
snd_hsize = _sndFile.readUint16LE();
if (!(snd_hdr = new byte[snd_hsize])) {
delete[] snd_buf;
snd_buf = nullptr;
return 1;
}
if (_sndFile.read(snd_hdr, snd_hsize) != snd_hsize) {
delete[] snd_buf;
delete[] snd_hdr;
snd_buf = nullptr;
snd_hdr = nullptr;
return 1;
}
return 2;
}
int16 Magnetic::find_name_in_sndheader(const Common::String &name) {
int16 header_pos = 0;
while (header_pos < snd_hsize) {
const char *hname = (const char *)(snd_hdr + header_pos);
if (name == hname)
return header_pos;
header_pos += 18;
}
return -1;
}
byte *Magnetic::sound_extract(const Common::String &name, uint32 *length, uint16 *tempo) {
uint32 offset = 0;
int16 header_pos = -1;
if (header_pos < 0)
header_pos = find_name_in_sndheader(name);
if (header_pos < 0)
return 0;
*tempo = READ_BE_UINT16(snd_hdr + header_pos + 8);
offset = READ_BE_UINT32(snd_hdr + header_pos + 10);
*length = READ_BE_UINT32(snd_hdr + header_pos + 14);
if (offset != 0) {
if (!snd_buf)
return nullptr;
if (!_sndFile.seek(offset))
return nullptr;
if (_sndFile.read(snd_buf, *length) != *length)
return nullptr;
return snd_buf;
}
return nullptr;
}
} // End of namespace Magnetic
} // End of namespace Glk
|
