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 - 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/adlibmusic.h"
#include "sound/fmopl.h"
void SkyAdlibMusic::passMixerFunc(void *param, int16 *buf, uint len) {
((SkyAdlibMusic*)param)->premixerCall(buf, len);
}
SkyAdlibMusic::SkyAdlibMusic(SoundMixer *pMixer, SkyDisk *pSkyDisk, OSystem *system)
: SkyMusicBase(pSkyDisk, system) {
_driverFileBase = 60202;
_mixer = pMixer;
_sampleRate = pMixer->getOutputRate();
int env_bits = g_system->property(OSystem::PROP_GET_FMOPL_ENV_BITS, NULL);
int eg_ent = g_system->property(OSystem::PROP_GET_FMOPL_EG_ENT, NULL);
OPLBuildTables((env_bits ? env_bits : FMOPL_ENV_BITS_HQ), (eg_ent ? eg_ent : FMOPL_EG_ENT_HQ));
_opl = OPLCreate(OPL_TYPE_YM3812, 3579545, _sampleRate);
_mixer->setupPremix(passMixerFunc, this);
}
SkyAdlibMusic::~SkyAdlibMusic(void) {
_mixer->setupPremix(NULL, NULL);
// YM3812Shutdown();
}
void SkyAdlibMusic::setVolume(uint8 volume) {
_musicVolume = volume;
for (uint8 cnt = 0; cnt < _numberOfChannels; cnt++)
_channels[cnt]->updateVolume(volume | 128);
}
void SkyAdlibMusic::premixerCall(int16 *data, uint len) {
if (_musicData == NULL) {
// no music loaded
memset(data, 0, 2 * len * sizeof(int16));
} else if ((_currentMusic == 0) || (_numberOfChannels == 0)) {
// music loaded but not played as of yet
memset(data, 0, 2 * len * sizeof(int16));
// poll anyways as pollMusic() can activate the music
pollMusic();
_nextMusicPoll = _sampleRate/50;
} else {
uint32 render;
int16 *origData = data;
uint origLen = len;
while (len) {
render = (len > _nextMusicPoll) ? (_nextMusicPoll) : (len);
len -= render;
_nextMusicPoll -= render;
YM3812UpdateOne(_opl, data, render);
data += render;
if (_nextMusicPoll == 0) {
pollMusic();
_nextMusicPoll = _sampleRate/50;
}
}
// Convert mono data to stereo
for (int i = (origLen - 1); i >= 0; i--) {
origData[2 * i] = origData[2 * i + 1] = origData[i];
}
}
}
void SkyAdlibMusic::setupPointers(void) {
if (SkyState::_systemVars.gameVersion == 109) {
// disk demo uses a different adlib driver version, some offsets have changed
//_musicDataLoc = (_musicData[0x11CC] << 8) | _musicData[0x11CB];
//_initSequence = _musicData + 0xEC8;
_musicDataLoc = READ_LE_UINT16(_musicData + 0x1200);
_initSequence = _musicData + 0xEFB;
} else if (SkyState::_systemVars.gameVersion == 267) {
_musicDataLoc = READ_LE_UINT16(_musicData + 0x11F7);
_initSequence = _musicData + 0xE87;
} else {
_musicDataLoc = READ_LE_UINT16(_musicData + 0x1201);
_initSequence = _musicData + 0xE91;
}
_nextMusicPoll = 0;
}
void SkyAdlibMusic::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 SkyAdlibChannel(_opl, _musicData, chDataStart);
_channels[cnt]->updateVolume(_musicVolume | 128);
}
}
void SkyAdlibMusic::startDriver(void) {
uint16 cnt = 0;
while (_initSequence[cnt] || _initSequence[cnt+1]) {
OPLWriteReg (_opl, _initSequence[cnt], _initSequence[cnt+1]);
cnt += 2;
}
_allowedCommands = 0xD;
}
|
