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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
|
/* 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 "common/stream.h"
#include "common/memstream.h"
#include "common/textconsole.h"
#include "gob/sound/adlplayer.h"
namespace Gob {
ADLPlayer::ADLPlayer(Audio::Mixer &mixer) : AdLib(mixer, 1000),
_songData(0), _songDataSize(0), _playPos(0) {
}
ADLPlayer::~ADLPlayer() {
unload();
}
void ADLPlayer::unload() {
stopPlay();
_timbres.clear();
delete[] _songData;
_songData = 0;
_songDataSize = 0;
_playPos = 0;
}
uint32 ADLPlayer::pollMusic(bool first) {
if (_timbres.empty() || !_songData || !_playPos || (_playPos >= (_songData + _songDataSize))) {
end();
return 0;
}
// We'll ignore the first delay
if (first)
_playPos += (*_playPos & 0x80) ? 2 : 1;
byte cmd = *_playPos++;
// Song end marker
if (cmd == 0xFF) {
end();
return 0;
}
// Set the instrument that should be modified
if (cmd == 0xFE)
_modifyInstrument = *_playPos++;
if (cmd >= 0xD0) {
// Modify an instrument
if (_modifyInstrument == 0xFF)
warning("ADLPlayer: No instrument to modify");
else if (_modifyInstrument >= _timbres.size())
warning("ADLPlayer: Can't modify invalid instrument %d (%d)", _modifyInstrument, _timbres.size());
else
_timbres[_modifyInstrument].params[_playPos[0]] = _playPos[1];
_playPos += 2;
// If we currently have that instrument loaded, reload it
for (int i = 0; i < kMaxVoiceCount; i++)
if (_currentInstruments[i] == _modifyInstrument)
setInstrument(i, _modifyInstrument);
} else {
// Voice command
uint8 voice = cmd & 0x0F;
uint8 note, volume;
switch (cmd & 0xF0) {
case 0x00: // Note on with volume
note = *_playPos++;
volume = *_playPos++;
setVoiceVolume(voice, volume);
noteOn(voice, note);
break;
case 0xA0: // Pitch bend
bendVoicePitch(voice, ((uint16)*_playPos++) << 7);
break;
case 0xB0: // Set volume
setVoiceVolume(voice, *_playPos++);
break;
case 0xC0: // Set instrument
setInstrument(voice, *_playPos++);
break;
case 0x90: // Note on
noteOn(voice, *_playPos++);
break;
case 0x80: // Note off
noteOff(voice);
break;
default:
warning("ADLPlayer: Unsupported command: 0x%02X. Stopping playback.", cmd);
end(true);
return 0;
}
}
uint16 delay = *_playPos++;
if (delay & 0x80)
delay = ((delay & 3) << 8) | *_playPos++;
return delay;
}
void ADLPlayer::rewind() {
// Reset song data
_playPos = _songData;
// Set melody/percussion mode
setPercussionMode(_soundMode != 0);
// Reset instruments
for (Common::Array<Timbre>::iterator t = _timbres.begin(); t != _timbres.end(); ++t)
memcpy(t->params, t->startParams, kOperatorsPerVoice * kParamCount * sizeof(uint16));
for (int i = 0; i < kMaxVoiceCount; i++)
_currentInstruments[i] = 0;
// Reset voices
int numVoice = MIN<int>(_timbres.size(), _soundMode ? (int)kMaxVoiceCount : (int)kMelodyVoiceCount);
for (int i = 0; i < numVoice; i++) {
setInstrument(i, _currentInstruments[i]);
setVoiceVolume(i, kMaxVolume);
}
_modifyInstrument = 0xFF;
}
bool ADLPlayer::load(Common::SeekableReadStream &adl) {
unload();
int timbreCount;
if (!readHeader(adl, timbreCount)) {
unload();
return false;
}
if (!readTimbres(adl, timbreCount) || !readSongData(adl) || adl.err()) {
unload();
return false;
}
rewind();
return true;
}
bool ADLPlayer::readHeader(Common::SeekableReadStream &adl, int &timbreCount) {
// Sanity check
if (adl.size() < 60) {
warning("ADLPlayer::readHeader(): File too small (%d)", adl.size());
return false;
}
_soundMode = adl.readByte();
timbreCount = adl.readByte() + 1;
adl.skip(1);
return true;
}
bool ADLPlayer::readTimbres(Common::SeekableReadStream &adl, int timbreCount) {
_timbres.resize(timbreCount);
for (Common::Array<Timbre>::iterator t = _timbres.begin(); t != _timbres.end(); ++t) {
for (int i = 0; i < (kOperatorsPerVoice * kParamCount); i++)
t->startParams[i] = adl.readUint16LE();
}
if (adl.err()) {
warning("ADLPlayer::readTimbres(): Read failed");
return false;
}
return true;
}
bool ADLPlayer::readSongData(Common::SeekableReadStream &adl) {
_songDataSize = adl.size() - adl.pos();
_songData = new byte[_songDataSize];
if (adl.read(_songData, _songDataSize) != _songDataSize) {
warning("ADLPlayer::readSongData(): Read failed");
return false;
}
return true;
}
bool ADLPlayer::load(const byte *data, uint32 dataSize, int index) {
unload();
Common::MemoryReadStream stream(data, dataSize);
if (!load(stream))
return false;
_index = index;
return true;
}
void ADLPlayer::setInstrument(int voice, int instrument) {
if ((voice >= kMaxVoiceCount) || ((uint)instrument >= _timbres.size()))
return;
_currentInstruments[voice] = instrument;
setVoiceTimbre(voice, _timbres[instrument].params);
}
int ADLPlayer::getIndex() const {
return _index;
}
} // End of namespace Gob
|