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
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/* 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.
*
* $URL$
* $Id$
*
*/
#include "common/endian.h"
#include "common/util.h"
#include "common/stream.h"
#include "sound/audiostream.h"
#include "sound/mixer.h"
#include "sound/voc.h"
namespace Audio {
int getSampleRateFromVOCRate(int vocSR) {
if (vocSR == 0xa5 || vocSR == 0xa6) {
return 11025;
} else if (vocSR == 0xd2 || vocSR == 0xd3) {
return 22050;
} else {
int sr = 1000000L / (256L - vocSR);
// inexact sampling rates occur e.g. in the kitchen in Monkey Island,
// very easy to reach right from the start of the game.
//warning("inexact sample rate used: %i (0x%x)", sr, vocSR);
return sr;
}
}
static byte *loadVOCFromStream(Common::ReadStream &stream, int &size, int &rate, int &loops, int &begin_loop, int &end_loop) {
VocFileHeader fileHeader;
if (stream.read(&fileHeader, 8) != 8)
goto invalid;
if (!memcmp(&fileHeader, "VTLK", 4)) {
if (stream.read(&fileHeader, sizeof(VocFileHeader)) != sizeof(VocFileHeader))
goto invalid;
} else if (!memcmp(&fileHeader, "Creative", 8)) {
if (stream.read(((byte *)&fileHeader) + 8, sizeof(VocFileHeader) - 8) != sizeof(VocFileHeader) - 8)
goto invalid;
} else {
invalid:;
warning("loadVOCFromStream: Invalid header");
return NULL;
}
if (memcmp(fileHeader.desc, "Creative Voice File", 19) != 0)
error("loadVOCFromStream: Invalid header");
if (fileHeader.desc[19] != 0x1A)
debug(3, "loadVOCFromStream: Partially invalid header");
int32 offset = FROM_LE_16(fileHeader.datablock_offset);
int16 version = FROM_LE_16(fileHeader.version);
int16 code = FROM_LE_16(fileHeader.id);
assert(offset == sizeof(VocFileHeader));
// 0x100 is an invalid VOC version used by German version of DOTT (Disk) and
// French version of Simon the Sorcerer 2 (CD)
assert(version == 0x010A || version == 0x0114 || version == 0x0100);
assert(code == ~version + 0x1234);
int len;
byte *ret_sound = 0;
size = 0;
begin_loop = 0;
end_loop = 0;
while ((code = stream.readByte())) {
len = stream.readByte();
len |= stream.readByte() << 8;
len |= stream.readByte() << 16;
switch (code) {
case 1:
case 9: {
int packing;
if (code == 1) {
int time_constant = stream.readByte();
packing = stream.readByte();
len -= 2;
rate = getSampleRateFromVOCRate(time_constant);
} else {
rate = stream.readUint32LE();
int bits = stream.readByte();
int channels = stream.readByte();
if (bits != 8 || channels != 1) {
warning("Unsupported VOC file format (%d bits per sample, %d channels)", bits, channels);
break;
}
packing = stream.readUint16LE();
stream.readUint32LE();
len -= 12;
}
debug(9, "VOC Data Block: %d, %d, %d", rate, packing, len);
if (packing == 0) {
if (size) {
ret_sound = (byte *)realloc(ret_sound, size + len);
} else {
ret_sound = (byte *)malloc(len);
}
stream.read(ret_sound + size, len);
size += len;
begin_loop = size;
end_loop = size;
} else {
warning("VOC file packing %d unsupported", packing);
}
} break;
case 6: // begin of loop
assert(len == 2);
loops = stream.readUint16LE();
break;
case 7: // end of loop
assert(len == 0);
break;
default:
warning("Unhandled code in VOC file : %d", code);
return ret_sound;
}
}
debug(4, "VOC Data Size : %d", size);
return ret_sound;
}
byte *loadVOCFromStream(Common::ReadStream &stream, int &size, int &rate) {
int loops, begin_loop, end_loop;
return loadVOCFromStream(stream, size, rate, loops, begin_loop, end_loop);
}
AudioStream *makeVOCStream(Common::ReadStream &stream) {
int size, rate;
byte *data = loadVOCFromStream(stream, size, rate);
if (!data)
return 0;
return makeLinearInputStream(data, size, rate, Audio::Mixer::FLAG_AUTOFREE | Audio::Mixer::FLAG_UNSIGNED, 0, 0);
}
} // End of namespace Audio
|
