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
|
/* 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 "audio/decoders/iff_sound.h"
#include "audio/audiostream.h"
#include "audio/mixer.h"
#include "audio/decoders/raw.h"
#include "common/iff_container.h"
#include "common/func.h"
namespace Audio {
struct Voice8Header {
uint32 oneShotHiSamples;
uint32 repeatHiSamples;
uint32 samplesPerHiCycle;
uint16 samplesPerSec;
byte octaves;
byte compression;
uint32 volume;
Voice8Header() {
memset(this, 0, sizeof(Voice8Header));
}
void load(Common::ReadStream &stream);
};
void Voice8Header::load(Common::ReadStream &stream) {
oneShotHiSamples = stream.readUint32BE();
repeatHiSamples = stream.readUint32BE();
samplesPerHiCycle = stream.readUint32BE();
samplesPerSec = stream.readUint16BE();
octaves = stream.readByte();
compression = stream.readByte();
volume = stream.readUint32BE();
}
struct A8SVXLoader {
Voice8Header _header;
int8 *_data;
uint32 _dataSize;
void load(Common::ReadStream &input) {
Common::IFFParser parser(&input);
Common::Functor1Mem< Common::IFFChunk&, bool, A8SVXLoader > c(this, &A8SVXLoader::callback);
parser.parse(c);
}
bool callback(Common::IFFChunk &chunk) {
switch (chunk._type) {
case ID_VHDR:
_header.load(*chunk._stream);
break;
case ID_BODY:
_dataSize = chunk._size;
_data = (int8*)malloc(_dataSize);
assert(_data);
loadData(chunk._stream);
return true;
}
return false;
}
void loadData(Common::ReadStream *stream) {
switch (_header.compression) {
case 0:
stream->read(_data, _dataSize);
break;
case 1:
// implement other formats here
error("compressed IFF audio is not supported");
break;
}
}
};
AudioStream *make8SVXStream(Common::ReadStream &input, bool loop) {
A8SVXLoader loader;
loader.load(input);
SeekableAudioStream *stream = Audio::makeRawStream((byte *)loader._data, loader._dataSize, loader._header.samplesPerSec, 0);
uint32 loopStart = 0, loopEnd = 0;
if (loop) {
// the standard way to loop 8SVX audio implies use of the oneShotHiSamples and
// repeatHiSamples fields
loopStart = 0;
loopEnd = loader._header.oneShotHiSamples + loader._header.repeatHiSamples;
if (loopStart != loopEnd) {
return new SubLoopingAudioStream(stream, 0,
Timestamp(0, loopStart, loader._header.samplesPerSec),
Timestamp(0, loopEnd, loader._header.samplesPerSec));
}
}
return stream;
}
}
|
