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
|
/* ScummVM - Scumm Interpreter
* Copyright (C) 2001-2005 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.
*
* $Header$
*/
#ifdef MACOSX
#include "stdafx.h"
#include "common/config-manager.h"
#include "common/util.h"
#include "sound/mpu401.h"
#include <AudioUnit/AudioUnit.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
/* CoreAudio MIDI driver
* Based on code by Benjamin W. Zale
* Extended by Max Horn
*/
class MidiDriver_CORE : public MidiDriver_MPU401 {
public:
MidiDriver_CORE() : au_MusicDevice(0), au_output(0) { }
int open();
void close();
void send(uint32 b);
void sysEx(byte *msg, uint16 length);
private:
AudioUnit au_MusicDevice;
AudioUnit au_output;
};
int MidiDriver_CORE::open() {
if (au_output != NULL)
return MERR_ALREADY_OPEN;
OSStatus err;
AudioUnitConnection auconnect;
ComponentDescription compdesc;
Component compid;
// 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
compdesc.componentType = kAudioUnitComponentType;
compdesc.componentSubType = kAudioUnitSubType_MusicDevice;
compdesc.componentManufacturer = kAudioUnitID_DLSSynth;
compdesc.componentFlags = 0;
compdesc.componentFlagsMask = 0;
compid = FindNextComponent(NULL, &compdesc);
au_MusicDevice = static_cast<AudioUnit>(OpenComponent(compid));
if (au_MusicDevice == 0)
error("Failed opening CoreAudio music device");
// Load custom soundfont, if specified
// FIXME: This is kind of a temporary hack. Better (IMO) would be to
// query QuickTime for whatever custom soundfont was set in the
// QuickTime Preferences, and use that automatically.
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) {
err = AudioUnitSetProperty (
au_MusicDevice,
kMusicDeviceProperty_SoundBankFSSpec, kAudioUnitScope_Global,
0,
&fsSpec, sizeof(fsSpec)
);
}
if (err != noErr)
warning("Failed loading custom sound font '%s' (error %d)\n", soundfont, err);
}
// open the output unit
au_output = (AudioUnit) OpenDefaultComponent(kAudioUnitComponentType, kAudioUnitSubType_Output);
if (au_output == 0)
error("Failed opening output audio unit");
// connect the units
auconnect.sourceAudioUnit = au_MusicDevice;
auconnect.sourceOutputNumber = 0;
auconnect.destInputNumber = 0;
err =
AudioUnitSetProperty(au_output, kAudioUnitProperty_MakeConnection, kAudioUnitScope_Input, 0,
(void *)&auconnect, sizeof(AudioUnitConnection));
#ifdef COREAUDIO_DISABLE_REVERB
UInt32 usesReverb = 0;
AudioUnitSetProperty (au_MusicDevice, kMusicDeviceProperty_UsesInternalReverb,
kAudioUnitScope_Global, 0, &usesReverb, sizeof (usesReverb));
#endif
// initialize the units
AudioUnitInitialize(au_MusicDevice);
AudioUnitInitialize(au_output);
// start the output
AudioOutputUnitStart(au_output);
return 0;
}
void MidiDriver_CORE::close() {
MidiDriver_MPU401::close();
// Stop the output
AudioOutputUnitStop(au_output);
// Cleanup
CloseComponent(au_output);
au_output = 0;
CloseComponent(au_MusicDevice);
au_MusicDevice = 0;
}
void MidiDriver_CORE::send(uint32 b) {
assert(au_output != NULL);
assert(au_MusicDevice != NULL);
unsigned char first_byte, second_byte, status_byte;
status_byte = (b & 0x000000FF);
first_byte = (b & 0x0000FF00) >> 8;
second_byte = (b & 0x00FF0000) >> 16;
MusicDeviceMIDIEvent(au_MusicDevice, status_byte, first_byte, second_byte, 0);
}
void MidiDriver_CORE::sysEx(byte *msg, uint16 length) {
assert(au_output != NULL);
assert(au_MusicDevice != NULL);
MusicDeviceSysEx(au_MusicDevice, msg, length);
}
MidiDriver *MidiDriver_CORE_create() {
return new MidiDriver_CORE();
}
#endif // MACOSX
|
