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
|
/* ScummVM - Scumm Interpreter
* Copyright (C) 2003-2004 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 "stdafx.h"
#include "music.h"
#include "sound/mixer.h"
#include "common/util.h"
#include "common/file.h"
namespace Sword1 {
// This means fading takes 3 seconds.
#define FADE_LENGTH 3
// These functions are only called from Music, so I'm just going to
// assume that if locking is needed it has already been taken care of.
void MusicHandle::fadeDown() {
if (_fading < 0)
_fading = -_fading;
else if (_fading == 0)
_fading = FADE_LENGTH * getRate();
_fadeSamples = FADE_LENGTH * getRate();
}
void MusicHandle::fadeUp() {
if (_fading > 0)
_fading = -_fading;
else if (_fading == 0)
_fading = -1;
_fadeSamples = FADE_LENGTH * getRate();
}
bool MusicHandle::endOfData() const {
return !streaming();
}
int MusicHandle::readBuffer(int16 *buffer, const int numSamples) {
int samples;
for (samples = 0; samples < numSamples && !endOfData(); samples++) {
int16 sample = _file.readUint16LE();
if (_file.ioFailed()) {
if (!_looping) {
stop();
sample = 0;
} else {
_file.clearIOFailed();
_file.seek(WAVEHEADERSIZE);
sample = _file.readUint16LE();
}
}
if (_fading > 0) {
if (--_fading == 0) {
_looping = false;
_file.close();
}
sample = (sample * _fading) / _fadeSamples;
} else if (_fading < 0) {
_fading--;
sample = -(sample * _fading) / _fadeSamples;
if (_fading == -_fadeSamples)
_fading = 0;
}
*buffer++ = sample;
}
return samples;
}
bool MusicHandle::play(const char *filename, bool loop) {
uint8 wavHeader[WAVEHEADERSIZE];
stop();
if (!_file.open(filename)) {
warning("Music file %s could not be opened", filename);
return false;
}
_file.read(wavHeader, WAVEHEADERSIZE);
_stereo = (READ_LE_UINT16(wavHeader + 0x16) == 2);
_rate = READ_LE_UINT16(wavHeader + 0x18);
_looping = loop;
fadeUp();
return true;
}
void MusicHandle::stop() {
if (_file.isOpen())
_file.close();
_fading = 0;
_looping = false;
}
Music::Music(OSystem *system, SoundMixer *pMixer) {
_system = system;
_mixer = pMixer;
_mixer->setupPremix(passMixerFunc, this);
_mutex = _system->create_mutex();
_converter[0] = NULL;
_converter[1] = NULL;
_volumeL = _volumeR = 192;
}
Music::~Music() {
_mixer->setupPremix(0, 0);
delete _converter[0];
delete _converter[1];
if (_mutex)
_system->delete_mutex(_mutex);
}
void Music::passMixerFunc(void *param, int16 *buf, uint len) {
((Music*)param)->mixer(buf, len);
}
void Music::mixer(int16 *buf, uint32 len) {
Common::StackLock lock(_mutex);
for (int i = 0; i < ARRAYSIZE(_handles); i++)
if (_handles[i].streaming() && _converter[i])
_converter[i]->flow(_handles[i], buf, len, _volumeL, _volumeR);
}
void Music::setVolume(uint8 volL, uint8 volR) {
_volumeL = (st_volume_t)volL;
_volumeR = (st_volume_t)volR;
}
void Music::giveVolume(uint8 *volL, uint8 *volR) {
*volL = (uint8)_volumeL;
*volR = (uint8)_volumeR;
}
void Music::startMusic(int32 tuneId, int32 loopFlag) {
Common::StackLock lock(_mutex);
if (strlen(_tuneList[tuneId]) > 0) {
int newStream = 0;
if (_handles[0].streaming() && _handles[1].streaming()) {
// If both handles are playing, stop the one that's
// fading down.
if (_handles[0].fading() > 0)
_handles[0].stop();
else
_handles[1].stop();
}
if (_handles[0].streaming()) {
_handles[0].fadeDown();
newStream = 1;
} else if (_handles[1].streaming()) {
_handles[1].fadeDown();
newStream = 0;
}
char fName[20];
sprintf(fName, "music/%s.wav", _tuneList[tuneId]);
if (_handles[newStream].play(fName, loopFlag != 0)) {
delete _converter[newStream];
_converter[newStream] = makeRateConverter(_handles[newStream].getRate(), _mixer->getOutputRate(), _handles[newStream].isStereo(), false);
}
} else {
if (_handles[0].streaming())
_handles[0].fadeDown();
if (_handles[1].streaming())
_handles[1].fadeDown();
}
}
void Music::fadeDown() {
Common::StackLock lock(_mutex);
for (int i = 0; i < ARRAYSIZE(_handles); i++)
if (_handles[i].streaming())
_handles[i].fadeDown();
}
} // End of namespace Sword1
|