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
|
/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001-2004 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 "scumm/player_mod.h"
#include "sound/mixer.h"
#include "sound/rate.h"
namespace Scumm {
Player_MOD::Player_MOD(ScummEngine *scumm) {
int i;
_mixer = scumm->_mixer;
_samplerate = _mixer->getOutputRate();
_mixamt = 0;
_mixpos = 0;
for (i = 0; i < MOD_MAXCHANS; i++) {
_channels[i].id = 0;
_channels[i].vol = 0;
_channels[i].freq = 0;
_channels[i].converter = NULL;
_channels[i].input = NULL;
}
_playproc = NULL;
_playparam = NULL;
_mixer->setupPremix(this);
}
Player_MOD::~Player_MOD() {
// Detach the premix callback handler
_mixer->setupPremix(0);
for (int i = 0; i < MOD_MAXCHANS; i++) {
if (!_channels[i].id)
continue;
delete _channels[i].converter;
delete _channels[i].input;
}
}
void Player_MOD::setMasterVolume(int vol) {
_maxvol = vol;
}
void Player_MOD::setUpdateProc(ModUpdateProc *proc, void *param, int freq) {
_playproc = proc;
_playparam = param;
_mixamt = _samplerate / freq;
}
void Player_MOD::clearUpdateProc() {
_playproc = NULL;
_playparam = NULL;
_mixamt = 0;
}
void Player_MOD::startChannel(int id, void *data, int size, int rate, uint8 vol, int loopStart, int loopEnd, int8 pan) {
int i;
if (id == 0)
error("player_mod - attempted to start channel id 0");
for (i = 0; i < MOD_MAXCHANS; i++) {
if (!_channels[i].id)
break;
}
if (i == MOD_MAXCHANS) {
warning("player_mod - too many music channels playing (%i max)",MOD_MAXCHANS);
return;
}
_channels[i].id = id;
_channels[i].vol = vol;
_channels[i].pan = pan;
_channels[i].freq = rate;
_channels[i].input = makeLinearInputStream(rate, SoundMixer::FLAG_AUTOFREE | (loopStart != loopEnd ? SoundMixer::FLAG_LOOP : 0), (const byte*)data, size, loopStart, loopEnd - loopStart);
_channels[i].converter = makeRateConverter(rate, _mixer->getOutputRate(), false, false);
}
void Player_MOD::stopChannel(int id) {
if (id == 0)
error("player_mod - attempted to stop channel id 0");
for (int i = 0; i < MOD_MAXCHANS; i++) {
if (_channels[i].id == id) {
delete _channels[i].converter;
_channels[i].converter = NULL;
delete _channels[i].input;
_channels[i].input = NULL;
_channels[i].id = 0;
_channels[i].vol = 0;
_channels[i].freq = 0;
}
}
}
void Player_MOD::setChannelVol(int id, uint8 vol) {
if (id == 0)
error("player_mod - attempted to set volume for channel id 0");
for (int i = 0; i < MOD_MAXCHANS; i++) {
if (_channels[i].id == id) {
_channels[i].vol = vol;
break;
}
}
}
void Player_MOD::setChannelPan(int id, int8 pan) {
if (id == 0)
error("player_mod - attempted to set pan for channel id 0");
for (int i = 0; i < MOD_MAXCHANS; i++) {
if (_channels[i].id == id) {
_channels[i].pan = pan;
break;
}
}
}
void Player_MOD::setChannelFreq(int id, int freq) {
if (id == 0)
error("player_mod - attempted to set frequency for channel id 0");
for (int i = 0; i < MOD_MAXCHANS; i++) {
if (_channels[i].id == id) {
_channels[i].freq = freq;
delete _channels[i].converter;
_channels[i].converter = makeRateConverter(freq, _mixer->getOutputRate(), false, false);
break;
}
}
}
void Player_MOD::do_mix(int16 *data, uint len) {
int i;
int dpos = 0;
uint dlen = 0;
memset(data, 0, 2 * len * sizeof(int16));
while (len) {
if (_playproc) {
dlen = _mixamt - _mixpos;
if (!_mixpos)
_playproc(_playparam);
if (dlen <= len) {
_mixpos = 0;
len -= dlen;
} else {
_mixpos = _mixamt - len;
dlen = len;
len = 0;
}
} else {
dlen = len;
len = 0;
}
for (i = 0; i < MOD_MAXCHANS; i++)
if (_channels[i].id) {
st_volume_t vol_l = (127 - _channels[i].pan) * _channels[i].vol / 127;
st_volume_t vol_r = (127 + _channels[i].pan) * _channels[i].vol / 127;
_channels[i].converter->flow(*_channels[i].input, &data[dpos*2], dlen, vol_l, vol_r);
}
dpos += dlen;
}
}
} // End of namespace Scumm
|
