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
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
|
/* 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 "common/stdafx.h"
#include "common/config-manager.h"
#include "common/util.h"
#include "sound/mpu401.h"
#include <AudioUnit/AudioUnit.h>
#include <CoreMIDI/CoreMIDI.h>7
// 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
// Enable the following switch to make ScummVM try to use native MIDI hardware
// on your computer for MIDI output. This is currently quite hackish, in
// particular you have no way to specify which device is used (it just always
// uses the first output device it can find), nor is there a switch to
// force it to use the soft synth instead of the MIDI HW.
//#define ENABLE_HACKISH_NATIVE_MIDI_SUPPORT 1
/* CoreAudio MIDI driver
* Based on code by Benjamin W. Zale
* Extended by Max Horn
*/
class MidiDriver_CORE : public MidiDriver_MPU401 {
public:
MidiDriver_CORE();
~MidiDriver_CORE();
int open();
void close();
void send(uint32 b);
void sysEx(byte *msg, uint16 length);
private:
AudioUnit au_MusicDevice;
AudioUnit au_output;
MIDIClientRef mClient;
MIDIPortRef mOutPort;
MIDIEndpointRef mDest;
};
MidiDriver_CORE::MidiDriver_CORE()
: au_MusicDevice(0), au_output(0), mClient(0), mOutPort(0), mDest(0) {
OSStatus err;
err = MIDIClientCreate(CFSTR("ScummVM MIDI Driver for OS X"), NULL, NULL, &mClient);
}
MidiDriver_CORE::~MidiDriver_CORE() {
if (mClient)
MIDIClientDispose(mClient);
mClient = 0;
}
int MidiDriver_CORE::open() {
if (au_output || mDest)
return MERR_ALREADY_OPEN;
OSStatus err = noErr;
mOutPort = 0;
#ifdef ENABLE_HACKISH_NATIVE_MIDI_SUPPORT
int dests = MIDIGetNumberOfDestinations();
if (dests > 0 && mClient) {
mDest = MIDIGetDestination(0);
err = MIDIOutputPortCreate( mClient,
CFSTR("scummvm_output_port"),
&mOutPort);
}
#endif
if (err != noErr || !mOutPort) {
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();
if (mOutPort && mDest) {
MIDIPortDispose(mOutPort);
mOutPort = 0;
mDest = 0;
} else {
// 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) {
byte status_byte = (b & 0x000000FF);
byte first_byte = (b & 0x0000FF00) >> 8;
byte second_byte = (b & 0x00FF0000) >> 16;
if (mOutPort && mDest) {
MIDIPacketList packetList;
MIDIPacket *packet = &packetList.packet[0];
packetList.numPackets = 1;
packet->timeStamp = 0;
packet->length = 3;
packet->data[0] = status_byte;
packet->data[1] = first_byte;
packet->data[2] = second_byte;
MIDISend(mOutPort, mDest, &packetList);
} else {
assert(au_output != NULL);
assert(au_MusicDevice != NULL);
MusicDeviceMIDIEvent(au_MusicDevice, status_byte, first_byte, second_byte, 0);
}
}
void MidiDriver_CORE::sysEx(byte *msg, uint16 length) {
if (mOutPort && mDest) {
byte buf[384];
MIDIPacketList *packetList = (MIDIPacketList *)buf;
MIDIPacket *packet = packetList->packet;
assert(sizeof(buf) >= sizeof(UInt32) + sizeof(MIDITimeStamp) + sizeof(UInt16) + length + 2);
packetList->numPackets = 1;
packet->timeStamp = 0;
// Add SysEx frame if missing
if (*msg != 0xF0) {
packet->length = length + 2;
packet->data[0] = 0xF0;
memcpy(packet->data + 1, msg, length);
packet->data[length + 1] = 0xF7;
} else {
packet->length = length;
memcpy(packet->data, msg, length);
}
MIDISend(mOutPort, mDest, packetList);
} else {
assert(au_output != NULL);
assert(au_MusicDevice != NULL);
// Add SysEx frame if missing
byte *buf = 0;
if (*msg != 0xF0) {
buf = (byte *)malloc(length + 2);
buf[0] = 0xF0;
memcpy(buf+1, msg, length);
buf[length+1] = 0xF7;
msg = buf;
length += 2;
}
MusicDeviceSysEx(au_MusicDevice, msg, length);
free(buf);
}
}
MidiDriver *MidiDriver_CORE_create() {
return new MidiDriver_CORE();
}
#endif // MACOSX
|