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
|
#include "sound.h"
#include "resource.h"
// Instrument mapping for MT32 tracks emulated under GM.
static const byte mt32_to_gm[128] = {
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
0, 1, 0, 2, 4, 4, 5, 3, 16, 17, 18, 16, 16, 19, 20, 21, // 0x
6, 6, 6, 7, 7, 7, 8, 112, 62, 62, 63, 63, 38, 38, 39, 39, // 1x
88, 95, 52, 98, 97, 99, 14, 54, 102, 96, 53, 102, 81, 100, 14, 80, // 2x
48, 48, 49, 45, 41, 40, 42, 42, 43, 46, 45, 24, 25, 28, 27, 104, // 3x
32, 32, 34, 33, 36, 37, 35, 35, 79, 73, 72, 72, 74, 75, 64, 65, // 4x
66, 67, 71, 71, 68, 69, 70, 22, 56, 59, 57, 57, 60, 60, 58, 61, // 5x
61, 11, 11, 98, 14, 9, 14, 13, 12, 107, 107, 77, 78, 78, 76, 76, // 6x
47, 117, 127, 118, 118, 116, 115, 119, 115, 112, 55, 124, 123, 0, 14, 117 // 7x
};
namespace Kyra {
MusicPlayer::MusicPlayer(MidiDriver* driver, KyraEngine* engine) {
_engine = engine;
_driver = driver;
_isPlaying = _nativeMT32 = false;
memset(_channel, 0, sizeof(MidiChannel*) * 16);
memset(_channelVolume, 255, sizeof(uint8) * 16);
_volume = 0;
int ret = open();
if (ret != MERR_ALREADY_OPEN && ret != 0) {
error("couldn't open midi driver");
}
}
MusicPlayer::~MusicPlayer() {
_driver->setTimerCallback(NULL, NULL);
close();
}
void MusicPlayer::setVolume(int volume) {
if (volume < 0)
volume = 0;
else if (volume > 255)
volume = 255;
if (_volume == volume)
return;
_volume = volume;
for (int i = 0; i < 16; ++i) {
if (_channel[i]) {
_channel[i]->volume(_channelVolume[i] * _volume / 255);
}
}
}
int MusicPlayer::open() {
// Don't ever call open without first setting the output driver!
if (!_driver)
return 255;
int ret = _driver->open();
if (ret)
return ret;
_driver->setTimerCallback(this, &onTimer);
return 0;
}
void MusicPlayer::close() {
if (_driver)
_driver->close();
_driver = 0;
}
void MusicPlayer::send(uint32 b) {
uint8 channel = (byte)(b & 0x0F);
if ((b & 0xFFF0) == 0x07B0) {
// Adjust volume changes by master volume
uint8 volume = (uint8)((b >> 16) & 0x7F);
_channelVolume[channel] = volume;
volume = volume * _volume / 255;
b = (b & 0xFF00FFFF) | (volume << 16);
} else if ((b & 0xF0) == 0xC0 && !_nativeMT32) {
b = (b & 0xFFFF00FF) | mt32_to_gm[(b >> 8) & 0xFF] << 8;
} else if ((b & 0xFFF0) == 0x007BB0) {
//Only respond to All Notes Off if this channel
//has currently been allocated
if (!_channel[channel])
return;
}
if (!_channel[channel])
_channel[channel] = (channel == 9) ? _driver->getPercussionChannel() : _driver->allocateChannel();
if (_channel[channel])
_channel[channel]->send(b);
}
void MusicPlayer::metaEvent(byte type, byte *data, uint16 length) {
switch (type) {
case 0x2F: // End of Track
_parser->jumpToTick(0);
break;
default:
warning("Unhandled meta event: 0x%02x", type);
break;
}
}
void MusicPlayer::playMusic(const char* file) {
uint32 size;
uint8* data = 0;
data = (_engine->resManager())->fileData(file, &size);
if (!data) {
warning("couldn't load '%s'", file);
return;
}
playMusic(data, size);
}
void MusicPlayer::playMusic(uint8* data, uint32 size) {
if (_isPlaying)
stopMusic();
_parser = MidiParser::createParser_XMIDI();
assert(_parser);
if (!_parser->loadMusic(data, size)) {
warning("Error reading track!");
delete _parser;
_parser = 0;
return;
}
_parser->setTrack(0);
_parser->setMidiDriver(this);
_parser->setTimerRate(getBaseTempo());
_isPlaying = true;
}
void MusicPlayer::stopMusic() {
_isPlaying = false;
if (_parser) {
_parser->unloadMusic();
delete _parser;
_parser = NULL;
}
}
void MusicPlayer::onTimer(void *refCon) {
MusicPlayer *music = (MusicPlayer *)refCon;
if (music->_isPlaying)
music->_parser->onTimer();
}
void MusicPlayer::playTrack(uint8 track) {
if (_parser) {
_isPlaying = true;
_parser->setTrack(track);
_parser->jumpToTick(0);
}
}
} // end of namespace Kyra
|
