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
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*/
#include "common/stdafx.h"
#include "common/scummsys.h"
#ifdef USE_FLUIDSYNTH
#include "common/stdafx.h"
#include "common/config-manager.h"
#include "sound/mpu401.h"
#include "sound/softsynth/emumidi.h"
#include <fluidsynth.h>
class MidiDriver_FluidSynth : public MidiDriver_Emulated {
private:
MidiChannel_MPU401 _midiChannels[16];
fluid_settings_t *_settings;
fluid_synth_t *_synth;
int _soundFont;
int _outputRate;
Audio::SoundHandle _handle;
protected:
// Because GCC complains about casting from const to non-const...
void setInt(const char *name, int val);
void setNum(const char *name, double num);
void setStr(const char *name, const char *str);
void generateSamples(int16 *buf, int len);
public:
MidiDriver_FluidSynth(Audio::Mixer *mixer);
int open();
void close();
void send(uint32 b);
MidiChannel *allocateChannel();
MidiChannel *getPercussionChannel();
// AudioStream API
bool isStereo() const { return true; }
int getRate() const { return _outputRate; }
};
// MidiDriver method implementations
MidiDriver_FluidSynth::MidiDriver_FluidSynth(Audio::Mixer *mixer)
: MidiDriver_Emulated(mixer) {
for (int i = 0; i < ARRAYSIZE(_midiChannels); i++) {
_midiChannels[i].init(this, i);
}
// It ought to be possible to get FluidSynth to generate samples at
// lower
_outputRate = _mixer->getOutputRate();
if (_outputRate < 22050)
_outputRate = 22050;
else if (_outputRate > 96000)
_outputRate = 96000;
}
void MidiDriver_FluidSynth::setInt(const char *name, int val) {
char *name2 = strdup(name);
fluid_settings_setint(_settings, name2, val);
free(name2);
}
void MidiDriver_FluidSynth::setNum(const char *name, double val) {
char *name2 = strdup(name);
fluid_settings_setnum(_settings, name2, val);
free(name2);
}
void MidiDriver_FluidSynth::setStr(const char *name, const char *val) {
char *name2 = strdup(name);
char *val2 = strdup(val);
fluid_settings_setstr(_settings, name2, val2);
free(name2);
free(val2);
}
int MidiDriver_FluidSynth::open() {
if (_isOpen)
return MERR_ALREADY_OPEN;
if (!ConfMan.hasKey("soundfont"))
error("FluidSynth requires a 'soundfont' setting");
_settings = new_fluid_settings();
// The default gain setting is ridiculously low - at least for me. This
// cannot be fixed by ScummVM's volume settings because they can only
// soften the sound, not amplify it, so instead we add an option to
// adjust the gain of FluidSynth itself.
double gain = (double)ConfMan.getInt("midi_gain") / 100.0;
setNum("synth.gain", gain);
setNum("synth.sample-rate", _outputRate);
_synth = new_fluid_synth(_settings);
// In theory, this ought to reduce CPU load... but it doesn't make any
// noticeable difference for me, so disable it for now.
// fluid_synth_set_interp_method(_synth, -1, FLUID_INTERP_LINEAR);
// fluid_synth_set_reverb_on(_synth, 0);
// fluid_synth_set_chorus_on(_synth, 0);
const char *soundfont = ConfMan.get("soundfont").c_str();
_soundFont = fluid_synth_sfload(_synth, soundfont, 1);
if (_soundFont == -1)
error("Failed loading custom sound font '%s'", soundfont);
MidiDriver_Emulated::open();
// The MT-32 emulator uses kSFXSoundType here. I don't know why.
_mixer->playInputStream(Audio::Mixer::kMusicSoundType, &_handle, this, -1, 255, 0, false, true);
return 0;
}
void MidiDriver_FluidSynth::close() {
if (!_isOpen)
return;
_isOpen = false;
_mixer->stopHandle(_handle);
if (_soundFont != -1)
fluid_synth_sfunload(_synth, _soundFont, 1);
delete_fluid_synth(_synth);
delete_fluid_settings(_settings);
}
void MidiDriver_FluidSynth::send(uint32 b) {
//byte param3 = (byte) ((b >> 24) & 0xFF);
uint param2 = (byte) ((b >> 16) & 0xFF);
uint param1 = (byte) ((b >> 8) & 0xFF);
byte cmd = (byte) (b & 0xF0);
byte chan = (byte) (b & 0x0F);
switch (cmd) {
case 0x80: // Note Off
fluid_synth_noteoff(_synth, chan, param1);
break;
case 0x90: // Note On
fluid_synth_noteon(_synth, chan, param1, param2);
break;
case 0xA0: // Aftertouch
break;
case 0xB0: // Control Change
fluid_synth_cc(_synth, chan, param1, param2);
break;
case 0xC0: // Program Change
fluid_synth_program_change(_synth, chan, param1);
break;
case 0xD0: // Channel Pressure
break;
case 0xE0: // Pitch Bend
fluid_synth_pitch_bend(_synth, chan, (param2 << 7) | param1);
break;
case 0xF0: // SysEx
// We should never get here! SysEx information has to be
// sent via high-level semantic methods.
warning("MidiDriver_FluidSynth: Receiving SysEx command on a send() call");
break;
default:
warning("MidiDriver_FluidSynth: Unknown send() command 0x%02X", cmd);
break;
}
}
MidiChannel *MidiDriver_FluidSynth::allocateChannel() {
for (int i = 0; i < ARRAYSIZE(_midiChannels); i++) {
if (i != 9 && _midiChannels[i].allocate())
return &_midiChannels[i];
}
return NULL;
}
MidiChannel *MidiDriver_FluidSynth::getPercussionChannel() {
return &_midiChannels[9];
}
MidiDriver *MidiDriver_FluidSynth_create(Audio::Mixer *mixer) {
return new MidiDriver_FluidSynth(mixer);
}
void MidiDriver_FluidSynth::generateSamples(int16 *data, int len) {
fluid_synth_write_s16(_synth, len, data, 0, 2, data, 1, 2);
}
#endif
|
