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
|
/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2004 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 "common/util.h"
#include "scumm/smush/smush_mixer.h"
#include "scumm/smush/channel.h"
#include "scumm/scumm.h"
#include "scumm/sound.h"
#include "scumm/imuse.h"
#include "sound/mixer.h"
namespace Scumm {
SmushMixer::SmushMixer(SoundMixer *m) :
_mixer(m),
_soundFrequency(22050) {
for (int32 i = 0; i < NUM_CHANNELS; i++) {
_channels[i].id = -1;
_channels[i].chan = NULL;
}
}
SmushMixer::~SmushMixer() {
for (int32 i = 0; i < NUM_CHANNELS; i++) {
_mixer->stopHandle(_channels[i].handle);
}
}
SmushChannel *SmushMixer::findChannel(int32 track) {
debug(9, "SmushMixer::findChannel(%d)", track);
for (int32 i = 0; i < NUM_CHANNELS; i++) {
if (_channels[i].id == track)
return _channels[i].chan;
}
return NULL;
}
void SmushMixer::addChannel(SmushChannel *c) {
int32 track = c->getTrackIdentifier();
int i;
debug(9, "SmushMixer::addChannel(%d)", track);
for (i = 0; i < NUM_CHANNELS; i++) {
if (_channels[i].id == track)
warning("SmushMixer::addChannel(%d): channel already exists", track);
}
for (i = 0; i < NUM_CHANNELS; i++) {
if ((_channels[i].chan == NULL || _channels[i].id == -1) && !_channels[i].handle.isActive()) {
_channels[i].chan = c;
_channels[i].id = track;
return;
}
}
for (i = 0; i < NUM_CHANNELS; i++) {
warning("channel %d : %p(%d, %d)", i, (void *)_channels[i].chan,
_channels[i].chan ? _channels[i].chan->getTrackIdentifier() : -1,
_channels[i].chan ? _channels[i].chan->isTerminated() : 1);
}
error("SmushMixer::addChannel(%d): no channel available", track);
}
bool SmushMixer::handleFrame() {
debug(9, "SmushMixer::handleFrame()");
for (int i = 0; i < NUM_CHANNELS; i++) {
if (_channels[i].id != -1) {
if (_channels[i].chan->isTerminated()) {
delete _channels[i].chan;
_channels[i].id = -1;
_channels[i].chan = NULL;
_mixer->endStream(_channels[i].handle);
} else {
int32 rate, vol, pan;
bool stereo, is_16bit;
void *data;
_channels[i].chan->getParameters(rate, stereo, is_16bit, vol, pan);
int32 size = _channels[i].chan->availableSoundData();
byte flags = stereo ? SoundMixer::FLAG_STEREO : 0;
if (is_16bit) {
data = malloc(size * (stereo ? 2 : 1) * 4);
_channels[i].chan->getSoundData((int16 *)data, size);
size *= stereo ? 4 : 2;
flags |= SoundMixer::FLAG_16BITS;
} else {
data = malloc(size * (stereo ? 2 : 1) * 2);
_channels[i].chan->getSoundData((int8 *)data, size);
size *= stereo ? 2 : 1;
flags |= SoundMixer::FLAG_UNSIGNED;
}
if (_mixer->isReady()) {
if (!_channels[i].handle.isActive())
_mixer->newStream(&_channels[i].handle, rate, flags, 500000);
_mixer->setChannelVolume(_channels[i].handle, vol);
_mixer->setChannelBalance(_channels[i].handle, pan);
_mixer->appendStream(_channels[i].handle, data, size);
}
free(data);
}
}
}
return true;
}
bool SmushMixer::stop() {
debug(9, "SmushMixer::stop()");
for (int i = 0; i < NUM_CHANNELS; i++) {
if (_channels[i].id != -1) {
delete _channels[i].chan;
_channels[i].id = -1;
_channels[i].chan = NULL;
_mixer->endStream(_channels[i].handle);
}
}
return true;
}
} // End of namespace Scumm
|
