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
|
/* ScummVM - Scumm Interpreter
* Copyright (C) 2003 The ScummVM project
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "sky/music/mt32music.h"
void SkyMT32Music::passTimerFunc(void *param) {
((SkyMT32Music*)param)->timerCall();
}
SkyMT32Music::SkyMT32Music(MidiDriver *pMidiDrv, SkyDisk *pSkyDisk, OSystem *system)
: SkyMusicBase(pSkyDisk, system) {
_driverFileBase = 60200;
_midiDrv = pMidiDrv;
int midiRes = _midiDrv->open();
if (midiRes != 0) {
error("Can't open midi device. Errorcode: %d\n",midiRes);
}
_midiDrv->setTimerCallback(this, passTimerFunc);
_ignoreNextPoll = false;
for (uint8 cnt = 0; cnt < 128; cnt++)
_dummyMap[cnt] = cnt;
}
SkyMT32Music::~SkyMT32Music(void) {
_midiDrv->close();
_midiDrv->setTimerCallback(NULL, NULL);
delete _midiDrv;
}
void SkyMT32Music::timerCall(void) {
// midi driver polls hundred times per sec. We only want 50 times.
_ignoreNextPoll = !_ignoreNextPoll;
if (!_ignoreNextPoll) return;
if (_musicData != NULL)
pollMusic();
}
void SkyMT32Music::setVolume(uint8 volume) {
uint8 sysEx[6];
_musicVolume = volume;
sysEx[0] = 0x7F; sysEx[1] = 0x7F; sysEx[2] = 0x04; sysEx[3] = 0x01;
sysEx[4] = 0; sysEx[5] = volume & 0x7F;
_midiDrv->sysEx(sysEx, 6);
}
void SkyMT32Music::setupPointers(void) {
_musicDataLoc = (_musicData[0x7DD] << 8) | _musicData[0x7DC];
_sysExSequence = ((_musicData[0x7E1] << 8) | _musicData[0x7E0]) + _musicData;
}
void SkyMT32Music::setupChannels(uint8 *channelData) {
_numberOfChannels = channelData[0];
channelData++;
for (uint8 cnt = 0; cnt < _numberOfChannels; cnt++) {
uint16 chDataStart = ((channelData[(cnt << 1) | 1] << 8) | channelData[cnt << 1]) + _musicDataLoc;
_channels[cnt] = new SkyGmChannel(_musicData, chDataStart, _midiDrv, _dummyMap);
}
}
#define MIDI_PACK(a,b,c,d) ((a) | ((b) << 8) | ((c) << 16) | ((d) << 24))
bool SkyMT32Music::processPatchSysEx(uint8 *sysExData) {
uint8 sysExBuf[15];
uint8 crc = 0;
if (sysExData[0] & 0x80) return false;
// decompress data from stream
sysExBuf[0] = 0x41; sysExBuf[1] = 0x10; sysExBuf[2] = 0x16; sysExBuf[3] = 0x12; sysExBuf[4] = 0x5;
sysExBuf[5] = sysExData[0] >> 4; // patch offset part 1
sysExBuf[6] = (sysExData[0] & 0xF) << 3; // patch offset part 2
sysExBuf[7] = sysExData[1] >> 6; // timbre group
sysExBuf[8] = sysExData[1] & 0x3F; // timbre num
sysExBuf[9] = sysExData[2] & 0x3F; // key shift
sysExBuf[10] = sysExData[3] & 0x7F; // fine tune
sysExBuf[11] = sysExData[4] & 0x7F; // bender range
sysExBuf[12] = sysExData[2] >> 6; // assign mode
sysExBuf[13] = sysExData[3] >> 7; // reverb switch
for (uint8 cnt = 4; cnt < 14; cnt++)
crc -= sysExBuf[cnt];
sysExBuf[14] = crc; // crc
_midiDrv->sysEx(sysExBuf, 15);
return true;
}
void SkyMT32Music::startDriver(void) {
// setup timbres and patches using SysEx data
uint8* sysExData = _sysExSequence;
uint8 timbreNum = sysExData[0];
uint8 cnt, crc;
sysExData++;
uint8 sendBuf[256];
uint8 len;
sendBuf[0] = 0x41; sendBuf[1] = 0x10; sendBuf[2] = 0x16; sendBuf[3] = 0x12;
for (cnt = 0; cnt < timbreNum; cnt++) {
len = 7;
crc = 0;
// Timbre address
sendBuf[4] = 0x8 | (sysExData[0] >> 6);
sendBuf[5] = (sysExData[0] & 0x3F) << 1;
sendBuf[6] = 0xA;
sysExData++;
crc -= sendBuf[4] + sendBuf[5] + sendBuf[6];
uint8 dataLen = sysExData[0];
sysExData++;
// Timbre data:
do {
uint8 rlVal = 1;
uint8 codeVal = sysExData[0];
sysExData++;
if (codeVal & 0x80) {
codeVal &= 0x7F;
rlVal = sysExData[0];
sysExData++;
dataLen--;
}
for (uint8 cnt2 = 0; cnt2 < rlVal; cnt2++) {
sendBuf[len] = codeVal;
len++;
crc -= codeVal;
}
dataLen--;
} while (dataLen > 0);
sendBuf[len] = crc & 0x7F;
len++;
_midiDrv->sysEx(sendBuf, len);
}
while (processPatchSysEx(sysExData))
sysExData += 5;
}
|
