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
|
/* 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.
*
* $URL$
* $Id$
*/
#ifdef MACOSX
#include "common/stdafx.h"
#include "common/config-manager.h"
#include "common/util.h"
#include "sound/mpu401.h"
#include <AudioToolbox/AUGraph.h>
// Activating the following switch disables reverb support in the CoreAudio
// midi backend. Reverb will suck away a *lot* of CPU time, so on slower
// systems, you may want to turn it off completely.
// TODO: Maybe make this a config option?
//#define COREAUDIO_DISABLE_REVERB
// A macro to simplify error handling a bit.
#define RequireNoErr(error) \
do { \
err = error; \
if (err != noErr) \
goto bail; \
} while (false)
/* CoreAudio MIDI driver
* By Max Horn / Fingolfin
* Based on code by Benjamin W. Zale
*/
class MidiDriver_CORE : public MidiDriver_MPU401 {
public:
MidiDriver_CORE();
int open();
void close();
void send(uint32 b);
void sysEx(const byte *msg, uint16 length);
private:
AUGraph _auGraph;
AudioUnit _synth;
};
MidiDriver_CORE::MidiDriver_CORE()
: _auGraph(0) {
}
int MidiDriver_CORE::open() {
OSStatus err = 0;
if (_auGraph)
return MERR_ALREADY_OPEN;
// Open the Music Device.
// We use the AudioUnit v1 API, even though it is deprecated, because
// this way we stay compatible with older OS X versions.
// For v2, we'd use kAudioUnitType_MusicDevice and kAudioUnitSubType_DLSSynth
RequireNoErr(NewAUGraph(&_auGraph));
AUNode outputNode, synthNode;
ComponentDescription desc;
// The default output device
desc.componentType = kAudioUnitComponentType;
desc.componentSubType = kAudioUnitSubType_Output;
desc.componentManufacturer = kAudioUnitID_DefaultOutput;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
RequireNoErr(AUGraphNewNode(_auGraph, &desc, 0, NULL, &outputNode));
// The built-in default (softsynth) music device
desc.componentSubType = kAudioUnitSubType_MusicDevice;
desc.componentManufacturer = kAudioUnitID_DLSSynth;
RequireNoErr(AUGraphNewNode(_auGraph, &desc, 0, NULL, &synthNode));
// Connect the softsynth to the default output
RequireNoErr(AUGraphConnectNodeInput(_auGraph, synthNode, 0, outputNode, 0));
// Open and initialize the whole graph
RequireNoErr(AUGraphOpen(_auGraph));
RequireNoErr(AUGraphInitialize(_auGraph));
// Get the music device from the graph.
RequireNoErr(AUGraphGetNodeInfo(_auGraph, synthNode, NULL, NULL, NULL, &_synth));
// Load custom soundfont, if specified
if (ConfMan.hasKey("soundfont")) {
FSRef fsref;
FSSpec fsSpec;
const char *soundfont = ConfMan.get("soundfont").c_str();
err = FSPathMakeRef ((const byte *)soundfont, &fsref, NULL);
if (err == noErr) {
err = FSGetCatalogInfo (&fsref, kFSCatInfoNone, NULL, NULL, &fsSpec, NULL);
}
if (err == noErr) {
// TODO: We should really check here whether the file contains an
// actual soundfont...
err = AudioUnitSetProperty (
_synth,
kMusicDeviceProperty_SoundBankFSSpec, kAudioUnitScope_Global,
0,
&fsSpec, sizeof(fsSpec)
);
}
if (err != noErr)
warning("Failed loading custom sound font '%s' (error %ld)\n", soundfont, err);
}
#ifdef COREAUDIO_DISABLE_REVERB
// Disable reverb mode, as that sucks up a lot of CPU power, which can
// be painful on low end machines.
// TODO: Make this customizable via a config key?
UInt32 usesReverb = 0;
AudioUnitSetProperty (_synth, kMusicDeviceProperty_UsesInternalReverb,
kAudioUnitScope_Global, 0, &usesReverb, sizeof (usesReverb));
#endif
// Finally: Start the graph!
RequireNoErr(AUGraphStart(_auGraph));
return 0;
bail:
if (_auGraph) {
AUGraphStop(_auGraph);
DisposeAUGraph(_auGraph);
_auGraph = 0;
}
return MERR_CANNOT_CONNECT;
}
void MidiDriver_CORE::close() {
MidiDriver_MPU401::close();
if (_auGraph) {
AUGraphStop(_auGraph);
DisposeAUGraph(_auGraph);
_auGraph = 0;
}
}
void MidiDriver_CORE::send(uint32 b) {
assert(_auGraph != NULL);
byte status_byte = (b & 0x000000FF);
byte first_byte = (b & 0x0000FF00) >> 8;
byte second_byte = (b & 0x00FF0000) >> 16;
MusicDeviceMIDIEvent(_synth, status_byte, first_byte, second_byte, 0);
}
void MidiDriver_CORE::sysEx(const byte *msg, uint16 length) {
unsigned char buf[256];
assert(length + 2 <= 256);
assert(_auGraph != NULL);
// Add SysEx frame
buf[0] = 0xF0;
memcpy(buf + 1, msg, length);
buf[length + 1] = 0xF7;
// Send it
MusicDeviceSysEx(_synth, buf, length+2);
}
MidiDriver *MidiDriver_CORE_create() {
return new MidiDriver_CORE();
}
#endif // MACOSX
|
