-
Notifications
You must be signed in to change notification settings - Fork 0
/
RtMidi.cpp
2814 lines (2399 loc) · 89.4 KB
/
RtMidi.cpp
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
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/**********************************************************************/
/*! \class RtMidi
\brief An abstract base class for realtime MIDI input/output.
This class implements some common functionality for the realtime
MIDI input/output subclasses RtMidiIn and RtMidiOut.
RtMidi WWW site: http://music.mcgill.ca/~gary/rtmidi/
RtMidi: realtime MIDI i/o C++ classes
Copyright (c) 2003-2011 Gary P. Scavone
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation files
(the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of the Software,
and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
Any person wishing to distribute modifications to the Software is
requested to send the modifications to the original developer so that
they can be incorporated into the canonical version.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**********************************************************************/
// RtMidi: Version 1.0.15
#include "RtMidi.h"
#include <sstream>
//*********************************************************************//
// Common RtMidi Definitions
//*********************************************************************//
RtMidi :: RtMidi()
: apiData_( 0 ), connected_( false )
{
}
void RtMidi :: error( RtError::Type type )
{
if (type == RtError::WARNING) {
std::cerr << '\n' << errorString_ << "\n\n";
}
else if (type == RtError::DEBUG_WARNING) {
#if defined(__RTMIDI_DEBUG__)
std::cerr << '\n' << errorString_ << "\n\n";
#endif
}
else {
std::cerr << '\n' << errorString_ << "\n\n";
throw RtError( errorString_, type );
}
}
//*********************************************************************//
// Common RtMidiIn Definitions
//*********************************************************************//
RtMidiIn :: RtMidiIn( const std::string clientName, unsigned int queueSizeLimit ) : RtMidi()
{
this->initialize( clientName );
// Allocate the MIDI queue.
inputData_.queue.ringSize = queueSizeLimit;
if ( inputData_.queue.ringSize > 0 )
inputData_.queue.ring = new MidiMessage[ inputData_.queue.ringSize ];
}
void RtMidiIn :: setCallback( RtMidiCallback callback, void *userData )
{
if ( inputData_.usingCallback ) {
errorString_ = "RtMidiIn::setCallback: a callback function is already set!";
error( RtError::WARNING );
return;
}
if ( !callback ) {
errorString_ = "RtMidiIn::setCallback: callback function value is invalid!";
error( RtError::WARNING );
return;
}
inputData_.userCallback = (void *) callback;
inputData_.userData = userData;
inputData_.usingCallback = true;
}
void RtMidiIn :: cancelCallback()
{
if ( !inputData_.usingCallback ) {
errorString_ = "RtMidiIn::cancelCallback: no callback function was set!";
error( RtError::WARNING );
return;
}
inputData_.userCallback = 0;
inputData_.userData = 0;
inputData_.usingCallback = false;
}
void RtMidiIn :: ignoreTypes( bool midiSysex, bool midiTime, bool midiSense )
{
inputData_.ignoreFlags = 0;
if ( midiSysex ) inputData_.ignoreFlags = 0x01;
if ( midiTime ) inputData_.ignoreFlags |= 0x02;
if ( midiSense ) inputData_.ignoreFlags |= 0x04;
}
double RtMidiIn :: getMessage( std::vector<unsigned char> *message )
{
message->clear();
if ( inputData_.usingCallback ) {
errorString_ = "RtMidiIn::getNextMessage: a user callback is currently set for this port.";
error( RtError::WARNING );
return 0.0;
}
if ( inputData_.queue.size == 0 ) return 0.0;
// Copy queued message to the vector pointer argument and then "pop" it.
std::vector<unsigned char> *bytes = &(inputData_.queue.ring[inputData_.queue.front].bytes);
message->assign( bytes->begin(), bytes->end() );
double deltaTime = inputData_.queue.ring[inputData_.queue.front].timeStamp;
inputData_.queue.size--;
inputData_.queue.front++;
if ( inputData_.queue.front == inputData_.queue.ringSize )
inputData_.queue.front = 0;
return deltaTime;
}
//*********************************************************************//
// Common RtMidiOut Definitions
//*********************************************************************//
RtMidiOut :: RtMidiOut( const std::string clientName ) : RtMidi()
{
this->initialize( clientName );
}
//*********************************************************************//
// API: Macintosh OS-X
//*********************************************************************//
// API information found at:
// - http://developer.apple.com/audio/pdf/coreaudio.pdf
#if defined(__MACOSX_CORE__)
// The CoreMIDI API is based on the use of a callback function for
// MIDI input. We convert the system specific time stamps to delta
// time values.
// OS-X CoreMIDI header files.
#include <CoreMIDI/CoreMIDI.h>
#include <CoreAudio/HostTime.h>
#include <CoreServices/CoreServices.h>
// A structure to hold variables related to the CoreMIDI API
// implementation.
struct CoreMidiData {
MIDIClientRef client;
MIDIPortRef port;
MIDIEndpointRef endpoint;
MIDIEndpointRef destinationId;
unsigned long long lastTime;
MIDISysexSendRequest sysexreq;
};
//*********************************************************************//
// API: OS-X
// Class Definitions: RtMidiIn
//*********************************************************************//
void midiInputCallback( const MIDIPacketList *list, void *procRef, void *srcRef )
{
RtMidiIn::RtMidiInData *data = static_cast<RtMidiIn::RtMidiInData *> (procRef);
CoreMidiData *apiData = static_cast<CoreMidiData *> (data->apiData);
unsigned char status;
unsigned short nBytes, iByte, size;
unsigned long long time;
bool& continueSysex = data->continueSysex;
RtMidiIn::MidiMessage& message = data->message;
const MIDIPacket *packet = &list->packet[0];
for ( unsigned int i=0; i<list->numPackets; ++i ) {
// My interpretation of the CoreMIDI documentation: all message
// types, except sysex, are complete within a packet and there may
// be several of them in a single packet. Sysex messages can be
// broken across multiple packets and PacketLists but are bundled
// alone within each packet (these packets do not contain other
// message types). If sysex messages are split across multiple
// MIDIPacketLists, they must be handled by multiple calls to this
// function.
nBytes = packet->length;
if ( nBytes == 0 ) continue;
// Calculate time stamp.
message.timeStamp = 0.0;
if ( data->firstMessage )
data->firstMessage = false;
else {
time = packet->timeStamp;
if ( time == 0 ) { // this happens when receiving asynchronous sysex messages
time = AudioGetCurrentHostTime();
}
time -= apiData->lastTime;
time = AudioConvertHostTimeToNanos( time );
message.timeStamp = time * 0.000000001;
}
apiData->lastTime = packet->timeStamp;
if ( apiData->lastTime == 0 ) { // this happens when receiving asynchronous sysex messages
apiData->lastTime = AudioGetCurrentHostTime();
}
//std::cout << "TimeStamp = " << packet->timeStamp << std::endl;
iByte = 0;
if ( continueSysex ) {
// We have a continuing, segmented sysex message.
if ( !( data->ignoreFlags & 0x01 ) ) {
// If we're not ignoring sysex messages, copy the entire packet.
for ( unsigned int j=0; j<nBytes; ++j )
message.bytes.push_back( packet->data[j] );
}
continueSysex = packet->data[nBytes-1] != 0xF7;
if ( !continueSysex ) {
// If not a continuing sysex message, invoke the user callback function or queue the message.
if ( data->usingCallback && message.bytes.size() > 0 ) {
RtMidiIn::RtMidiCallback callback = (RtMidiIn::RtMidiCallback) data->userCallback;
callback( message.timeStamp, &message.bytes, data->userData );
}
else {
// As long as we haven't reached our queue size limit, push the message.
if ( data->queue.size < data->queue.ringSize ) {
data->queue.ring[data->queue.back++] = message;
if ( data->queue.back == data->queue.ringSize )
data->queue.back = 0;
data->queue.size++;
}
else
std::cerr << "\nRtMidiIn: message queue limit reached!!\n\n";
}
message.bytes.clear();
}
}
else {
while ( iByte < nBytes ) {
size = 0;
// We are expecting that the next byte in the packet is a status byte.
status = packet->data[iByte];
if ( !(status & 0x80) ) break;
// Determine the number of bytes in the MIDI message.
if ( status < 0xC0 ) size = 3;
else if ( status < 0xE0 ) size = 2;
else if ( status < 0xF0 ) size = 3;
else if ( status == 0xF0 ) {
// A MIDI sysex
if ( data->ignoreFlags & 0x01 ) {
size = 0;
iByte = nBytes;
}
else size = nBytes - iByte;
continueSysex = packet->data[nBytes-1] != 0xF7;
}
else if ( status == 0xF1 ) {
// A MIDI time code message
if ( data->ignoreFlags & 0x02 ) {
size = 0;
iByte += 2;
}
else size = 2;
}
else if ( status == 0xF2 ) size = 3;
else if ( status == 0xF3 ) size = 2;
else if ( status == 0xF8 && ( data->ignoreFlags & 0x02 ) ) {
// A MIDI timing tick message and we're ignoring it.
size = 0;
iByte += 1;
}
else if ( status == 0xFE && ( data->ignoreFlags & 0x04 ) ) {
// A MIDI active sensing message and we're ignoring it.
size = 0;
iByte += 1;
}
else size = 1;
// Copy the MIDI data to our vector.
if ( size ) {
message.bytes.assign( &packet->data[iByte], &packet->data[iByte+size] );
if ( !continueSysex ) {
// If not a continuing sysex message, invoke the user callback function or queue the message.
if ( data->usingCallback ) {
RtMidiIn::RtMidiCallback callback = (RtMidiIn::RtMidiCallback) data->userCallback;
callback( message.timeStamp, &message.bytes, data->userData );
}
else {
// As long as we haven't reached our queue size limit, push the message.
if ( data->queue.size < data->queue.ringSize ) {
data->queue.ring[data->queue.back++] = message;
if ( data->queue.back == data->queue.ringSize )
data->queue.back = 0;
data->queue.size++;
}
else
std::cerr << "\nRtMidiIn: message queue limit reached!!\n\n";
}
message.bytes.clear();
}
iByte += size;
}
}
}
packet = MIDIPacketNext(packet);
}
}
void RtMidiIn :: initialize( const std::string& clientName )
{
// Set up our client.
MIDIClientRef client;
OSStatus result = MIDIClientCreate( CFStringCreateWithCString( NULL, clientName.c_str(), kCFStringEncodingASCII ), NULL, NULL, &client );
if ( result != noErr ) {
errorString_ = "RtMidiIn::initialize: error creating OS-X MIDI client object.";
error( RtError::DRIVER_ERROR );
}
// Save our api-specific connection information.
CoreMidiData *data = (CoreMidiData *) new CoreMidiData;
data->client = client;
data->endpoint = 0;
apiData_ = (void *) data;
inputData_.apiData = (void *) data;
}
void RtMidiIn :: openPort( unsigned int portNumber, const std::string portName )
{
if ( connected_ ) {
errorString_ = "RtMidiIn::openPort: a valid connection already exists!";
error( RtError::WARNING );
return;
}
unsigned int nSrc = MIDIGetNumberOfSources();
if (nSrc < 1) {
errorString_ = "RtMidiIn::openPort: no MIDI input sources found!";
error( RtError::NO_DEVICES_FOUND );
}
std::ostringstream ost;
if ( portNumber >= nSrc ) {
ost << "RtMidiIn::openPort: the 'portNumber' argument (" << portNumber << ") is invalid.";
errorString_ = ost.str();
error( RtError::INVALID_PARAMETER );
}
MIDIPortRef port;
CoreMidiData *data = static_cast<CoreMidiData *> (apiData_);
OSStatus result = MIDIInputPortCreate( data->client,
CFStringCreateWithCString( NULL, portName.c_str(), kCFStringEncodingASCII ),
midiInputCallback, (void *)&inputData_, &port );
if ( result != noErr ) {
MIDIClientDispose( data->client );
errorString_ = "RtMidiIn::openPort: error creating OS-X MIDI input port.";
error( RtError::DRIVER_ERROR );
}
// Get the desired input source identifier.
MIDIEndpointRef endpoint = MIDIGetSource( portNumber );
if ( endpoint == 0 ) {
MIDIPortDispose( port );
MIDIClientDispose( data->client );
errorString_ = "RtMidiIn::openPort: error getting MIDI input source reference.";
error( RtError::DRIVER_ERROR );
}
// Make the connection.
result = MIDIPortConnectSource( port, endpoint, NULL );
if ( result != noErr ) {
MIDIPortDispose( port );
MIDIClientDispose( data->client );
errorString_ = "RtMidiIn::openPort: error connecting OS-X MIDI input port.";
error( RtError::DRIVER_ERROR );
}
// Save our api-specific port information.
data->port = port;
connected_ = true;
}
void RtMidiIn :: openVirtualPort( const std::string portName )
{
CoreMidiData *data = static_cast<CoreMidiData *> (apiData_);
// Create a virtual MIDI input destination.
MIDIEndpointRef endpoint;
OSStatus result = MIDIDestinationCreate( data->client,
CFStringCreateWithCString( NULL, portName.c_str(), kCFStringEncodingASCII ),
midiInputCallback, (void *)&inputData_, &endpoint );
if ( result != noErr ) {
errorString_ = "RtMidiIn::openVirtualPort: error creating virtual OS-X MIDI destination.";
error( RtError::DRIVER_ERROR );
}
// Save our api-specific connection information.
data->endpoint = endpoint;
}
void RtMidiIn :: closePort( void )
{
if ( connected_ ) {
CoreMidiData *data = static_cast<CoreMidiData *> (apiData_);
MIDIPortDispose( data->port );
connected_ = false;
}
}
RtMidiIn :: ~RtMidiIn()
{
// Close a connection if it exists.
closePort();
// Cleanup.
CoreMidiData *data = static_cast<CoreMidiData *> (apiData_);
MIDIClientDispose( data->client );
if ( data->endpoint ) MIDIEndpointDispose( data->endpoint );
delete data;
// Delete the MIDI queue.
if ( inputData_.queue.ringSize > 0 ) delete [] inputData_.queue.ring;
}
unsigned int RtMidiIn :: getPortCount()
{
return MIDIGetNumberOfSources();
}
// This function was submitted by Douglas Casey Tucker and apparently
// derived largely from PortMidi.
CFStringRef EndpointName( MIDIEndpointRef endpoint, bool isExternal )
{
CFMutableStringRef result = CFStringCreateMutable( NULL, 0 );
CFStringRef str;
// Begin with the endpoint's name.
str = NULL;
MIDIObjectGetStringProperty( endpoint, kMIDIPropertyName, &str );
if ( str != NULL ) {
CFStringAppend( result, str );
CFRelease( str );
}
MIDIEntityRef entity = NULL;
MIDIEndpointGetEntity( endpoint, &entity );
if ( entity == 0 )
// probably virtual
return result;
if ( CFStringGetLength( result ) == 0 ) {
// endpoint name has zero length -- try the entity
str = NULL;
MIDIObjectGetStringProperty( entity, kMIDIPropertyName, &str );
if ( str != NULL ) {
CFStringAppend( result, str );
CFRelease( str );
}
}
// now consider the device's name
MIDIDeviceRef device = 0;
MIDIEntityGetDevice( entity, &device );
if ( device == 0 )
return result;
str = NULL;
MIDIObjectGetStringProperty( device, kMIDIPropertyName, &str );
if ( CFStringGetLength( result ) == 0 ) {
CFRelease( result );
return str;
}
if ( str != NULL ) {
// if an external device has only one entity, throw away
// the endpoint name and just use the device name
if ( isExternal && MIDIDeviceGetNumberOfEntities( device ) < 2 ) {
CFRelease( result );
return str;
} else {
if ( CFStringGetLength( str ) == 0 ) {
CFRelease( str );
return result;
}
// does the entity name already start with the device name?
// (some drivers do this though they shouldn't)
// if so, do not prepend
if ( CFStringCompareWithOptions( result, /* endpoint name */
str /* device name */,
CFRangeMake(0, CFStringGetLength( str ) ), 0 ) != kCFCompareEqualTo ) {
// prepend the device name to the entity name
if ( CFStringGetLength( result ) > 0 )
CFStringInsert( result, 0, CFSTR(" ") );
CFStringInsert( result, 0, str );
}
CFRelease( str );
}
}
return result;
}
// This function was submitted by Douglas Casey Tucker and apparently
// derived largely from PortMidi.
static CFStringRef ConnectedEndpointName( MIDIEndpointRef endpoint )
{
CFMutableStringRef result = CFStringCreateMutable( NULL, 0 );
CFStringRef str;
OSStatus err;
int i;
// Does the endpoint have connections?
CFDataRef connections = NULL;
int nConnected = 0;
bool anyStrings = false;
err = MIDIObjectGetDataProperty( endpoint, kMIDIPropertyConnectionUniqueID, &connections );
if ( connections != NULL ) {
// It has connections, follow them
// Concatenate the names of all connected devices
nConnected = CFDataGetLength( connections ) / sizeof(MIDIUniqueID);
if ( nConnected ) {
const SInt32 *pid = (const SInt32 *)(CFDataGetBytePtr(connections));
for ( i=0; i<nConnected; ++i, ++pid ) {
MIDIUniqueID id = EndianS32_BtoN( *pid );
MIDIObjectRef connObject;
MIDIObjectType connObjectType;
err = MIDIObjectFindByUniqueID( id, &connObject, &connObjectType );
if ( err == noErr ) {
if ( connObjectType == kMIDIObjectType_ExternalSource ||
connObjectType == kMIDIObjectType_ExternalDestination ) {
// Connected to an external device's endpoint (10.3 and later).
str = EndpointName( (MIDIEndpointRef)(connObject), true );
} else {
// Connected to an external device (10.2) (or something else, catch-
str = NULL;
MIDIObjectGetStringProperty( connObject, kMIDIPropertyName, &str );
}
if ( str != NULL ) {
if ( anyStrings )
CFStringAppend( result, CFSTR(", ") );
else anyStrings = true;
CFStringAppend( result, str );
CFRelease( str );
}
}
}
}
CFRelease( connections );
}
if ( anyStrings )
return result;
// Here, either the endpoint had no connections, or we failed to obtain names
return EndpointName( endpoint, false );
}
std::string RtMidiIn :: getPortName( unsigned int portNumber )
{
CFStringRef nameRef;
MIDIEndpointRef portRef;
std::ostringstream ost;
char name[128];
std::string stringName;
if ( portNumber >= MIDIGetNumberOfSources() ) {
ost << "RtMidiIn::getPortName: the 'portNumber' argument (" << portNumber << ") is invalid.";
errorString_ = ost.str();
error( RtError::WARNING );
//error( RtError::INVALID_PARAMETER );
return stringName;
}
portRef = MIDIGetSource( portNumber );
nameRef = ConnectedEndpointName(portRef);
CFStringGetCString( nameRef, name, sizeof(name), 0);
CFRelease( nameRef );
return stringName = name;
}
//*********************************************************************//
// API: OS-X
// Class Definitions: RtMidiOut
//*********************************************************************//
unsigned int RtMidiOut :: getPortCount()
{
return MIDIGetNumberOfDestinations();
}
std::string RtMidiOut :: getPortName( unsigned int portNumber )
{
CFStringRef nameRef;
MIDIEndpointRef portRef;
std::ostringstream ost;
char name[128];
std::string stringName;
if ( portNumber >= MIDIGetNumberOfDestinations() ) {
ost << "RtMidiOut::getPortName: the 'portNumber' argument (" << portNumber << ") is invalid.";
errorString_ = ost.str();
error( RtError::WARNING );
return stringName;
//error( RtError::INVALID_PARAMETER );
}
portRef = MIDIGetDestination( portNumber );
nameRef = ConnectedEndpointName(portRef);
CFStringGetCString( nameRef, name, sizeof(name), 0);
CFRelease( nameRef );
return stringName = name;
}
void RtMidiOut :: initialize( const std::string& clientName )
{
// Set up our client.
MIDIClientRef client;
OSStatus result = MIDIClientCreate( CFStringCreateWithCString( NULL, clientName.c_str(), kCFStringEncodingASCII ), NULL, NULL, &client );
if ( result != noErr ) {
errorString_ = "RtMidiOut::initialize: error creating OS-X MIDI client object.";
error( RtError::DRIVER_ERROR );
}
// Save our api-specific connection information.
CoreMidiData *data = (CoreMidiData *) new CoreMidiData;
data->client = client;
data->endpoint = 0;
apiData_ = (void *) data;
}
void RtMidiOut :: openPort( unsigned int portNumber, const std::string portName )
{
if ( connected_ ) {
errorString_ = "RtMidiOut::openPort: a valid connection already exists!";
error( RtError::WARNING );
return;
}
unsigned int nDest = MIDIGetNumberOfDestinations();
if (nDest < 1) {
errorString_ = "RtMidiOut::openPort: no MIDI output destinations found!";
error( RtError::NO_DEVICES_FOUND );
}
std::ostringstream ost;
if ( portNumber >= nDest ) {
ost << "RtMidiOut::openPort: the 'portNumber' argument (" << portNumber << ") is invalid.";
errorString_ = ost.str();
error( RtError::INVALID_PARAMETER );
}
MIDIPortRef port;
CoreMidiData *data = static_cast<CoreMidiData *> (apiData_);
OSStatus result = MIDIOutputPortCreate( data->client,
CFStringCreateWithCString( NULL, portName.c_str(), kCFStringEncodingASCII ),
&port );
if ( result != noErr ) {
MIDIClientDispose( data->client );
errorString_ = "RtMidiOut::openPort: error creating OS-X MIDI output port.";
error( RtError::DRIVER_ERROR );
}
// Get the desired output port identifier.
MIDIEndpointRef destination = MIDIGetDestination( portNumber );
if ( destination == 0 ) {
MIDIPortDispose( port );
MIDIClientDispose( data->client );
errorString_ = "RtMidiOut::openPort: error getting MIDI output destination reference.";
error( RtError::DRIVER_ERROR );
}
// Save our api-specific connection information.
data->port = port;
data->destinationId = destination;
connected_ = true;
}
void RtMidiOut :: closePort( void )
{
if ( connected_ ) {
CoreMidiData *data = static_cast<CoreMidiData *> (apiData_);
MIDIPortDispose( data->port );
connected_ = false;
}
}
void RtMidiOut :: openVirtualPort( std::string portName )
{
CoreMidiData *data = static_cast<CoreMidiData *> (apiData_);
if ( data->endpoint ) {
errorString_ = "RtMidiOut::openVirtualPort: a virtual output port already exists!";
error( RtError::WARNING );
return;
}
// Create a virtual MIDI output source.
MIDIEndpointRef endpoint;
OSStatus result = MIDISourceCreate( data->client,
CFStringCreateWithCString( NULL, portName.c_str(), kCFStringEncodingASCII ),
&endpoint );
if ( result != noErr ) {
errorString_ = "RtMidiOut::initialize: error creating OS-X virtual MIDI source.";
error( RtError::DRIVER_ERROR );
}
// Save our api-specific connection information.
data->endpoint = endpoint;
}
RtMidiOut :: ~RtMidiOut()
{
// Close a connection if it exists.
closePort();
// Cleanup.
CoreMidiData *data = static_cast<CoreMidiData *> (apiData_);
MIDIClientDispose( data->client );
if ( data->endpoint ) MIDIEndpointDispose( data->endpoint );
delete data;
}
char *sysexBuffer = 0;
void sysexCompletionProc( MIDISysexSendRequest * sreq )
{
//std::cout << "Completed SysEx send\n";
delete sysexBuffer;
sysexBuffer = 0;
}
void RtMidiOut :: sendMessage( std::vector<unsigned char> *message )
{
// We use the MIDISendSysex() function to asynchronously send sysex
// messages. Otherwise, we use a single CoreMidi MIDIPacket.
unsigned int nBytes = message->size();
if ( nBytes == 0 ) {
errorString_ = "RtMidiOut::sendMessage: no data in message argument!";
error( RtError::WARNING );
return;
}
// unsigned int packetBytes, bytesLeft = nBytes;
// unsigned int messageIndex = 0;
MIDITimeStamp timeStamp = AudioGetCurrentHostTime();
CoreMidiData *data = static_cast<CoreMidiData *> (apiData_);
OSStatus result;
if ( message->at(0) == 0xF0 ) {
while ( sysexBuffer != 0 ) usleep( 1000 ); // sleep 1 ms
sysexBuffer = new char[nBytes];
if ( sysexBuffer == NULL ) {
errorString_ = "RtMidiOut::sendMessage: error allocating sysex message memory!";
error( RtError::MEMORY_ERROR );
}
// Copy data to buffer.
for ( unsigned int i=0; i<nBytes; ++i ) sysexBuffer[i] = message->at(i);
data->sysexreq.destination = data->destinationId;
data->sysexreq.data = (Byte *)sysexBuffer;
data->sysexreq.bytesToSend = nBytes;
data->sysexreq.complete = 0;
data->sysexreq.completionProc = sysexCompletionProc;
data->sysexreq.completionRefCon = &(data->sysexreq);
result = MIDISendSysex( &(data->sysexreq) );
if ( result != noErr ) {
errorString_ = "RtMidiOut::sendMessage: error sending MIDI to virtual destinations.";
error( RtError::WARNING );
}
return;
}
else if ( nBytes > 3 ) {
errorString_ = "RtMidiOut::sendMessage: message format problem ... not sysex but > 3 bytes?";
error( RtError::WARNING );
return;
}
MIDIPacketList packetList;
MIDIPacket *packet = MIDIPacketListInit( &packetList );
packet = MIDIPacketListAdd( &packetList, sizeof(packetList), packet, timeStamp, nBytes, (const Byte *) &message->at( 0 ) );
if ( !packet ) {
errorString_ = "RtMidiOut::sendMessage: could not allocate packet list";
error( RtError::DRIVER_ERROR );
}
// Send to any destinations that may have connected to us.
if ( data->endpoint ) {
result = MIDIReceived( data->endpoint, &packetList );
if ( result != noErr ) {
errorString_ = "RtMidiOut::sendMessage: error sending MIDI to virtual destinations.";
error( RtError::WARNING );
}
}
// And send to an explicit destination port if we're connected.
if ( connected_ ) {
result = MIDISend( data->port, data->destinationId, &packetList );
if ( result != noErr ) {
errorString_ = "RtMidiOut::sendMessage: error sending MIDI message to port.";
error( RtError::WARNING );
}
}
}
#endif // __MACOSX_CORE__
//*********************************************************************//
// API: LINUX ALSA SEQUENCER
//*********************************************************************//
// API information found at:
// - http://www.alsa-project.org/documentation.php#Library
#if defined(__LINUX_ALSASEQ__)
// The ALSA Sequencer API is based on the use of a callback function for
// MIDI input.
//
// Thanks to Pedro Lopez-Cabanillas for help with the ALSA sequencer
// time stamps and other assorted fixes!!!
// If you don't need timestamping for incoming MIDI events, define the
// preprocessor definition AVOID_TIMESTAMPING to save resources
// associated with the ALSA sequencer queues.
#include <pthread.h>
#include <sys/time.h>
// ALSA header file.
#include <alsa/asoundlib.h>
// A structure to hold variables related to the ALSA API
// implementation.
struct AlsaMidiData {
snd_seq_t *seq;
int vport;
snd_seq_port_subscribe_t *subscription;
snd_midi_event_t *coder;
unsigned int bufferSize;
unsigned char *buffer;
pthread_t thread;
unsigned long long lastTime;
int queue_id; // an input queue is needed to get timestamped events
};
#define PORT_TYPE( pinfo, bits ) ((snd_seq_port_info_get_capability(pinfo) & (bits)) == (bits))
//*********************************************************************//
// API: LINUX ALSA
// Class Definitions: RtMidiIn
//*********************************************************************//
extern "C" void *alsaMidiHandler( void *ptr )
{
RtMidiIn::RtMidiInData *data = static_cast<RtMidiIn::RtMidiInData *> (ptr);
AlsaMidiData *apiData = static_cast<AlsaMidiData *> (data->apiData);
long nBytes;
unsigned long long time, lastTime;
bool continueSysex = false;
bool doDecode = false;
RtMidiIn::MidiMessage message;
snd_seq_event_t *ev;
int result;
apiData->bufferSize = 32;
result = snd_midi_event_new( 0, &apiData->coder );
if ( result < 0 ) {
data->doInput = false;
std::cerr << "\nRtMidiIn::alsaMidiHandler: error initializing MIDI event parser!\n\n";
return 0;
}
unsigned char *buffer = (unsigned char *) malloc( apiData->bufferSize );
if ( buffer == NULL ) {
data->doInput = false;
std::cerr << "\nRtMidiIn::alsaMidiHandler: error initializing buffer memory!\n\n";
return 0;
}
snd_midi_event_init( apiData->coder );
snd_midi_event_no_status( apiData->coder, 1 ); // suppress running status messages
while ( data->doInput ) {
if ( snd_seq_event_input_pending( apiData->seq, 1 ) == 0 ) {
// No data pending ... sleep a bit.
usleep( 1000 );
continue;
}
// If here, there should be data.
result = snd_seq_event_input( apiData->seq, &ev );
if ( result == -ENOSPC ) {
std::cerr << "\nRtMidiIn::alsaMidiHandler: MIDI input buffer overrun!\n\n";
continue;
}
else if ( result <= 0 ) {
std::cerr << "RtMidiIn::alsaMidiHandler: unknown MIDI input error!\n";
continue;
}
// This is a bit weird, but we now have to decode an ALSA MIDI
// event (back) into MIDI bytes. We'll ignore non-MIDI types.
if ( !continueSysex ) message.bytes.clear();
doDecode = false;
switch ( ev->type ) {
case SND_SEQ_EVENT_PORT_SUBSCRIBED:
#if defined(__RTMIDI_DEBUG__)
std::cout << "RtMidiIn::alsaMidiHandler: port connection made!\n";
#endif
break;
case SND_SEQ_EVENT_PORT_UNSUBSCRIBED:
#if defined(__RTMIDI_DEBUG__)
std::cerr << "RtMidiIn::alsaMidiHandler: port connection has closed!\n";
std::cout << "sender = " << (int) ev->data.connect.sender.client << ":"
<< (int) ev->data.connect.sender.port
<< ", dest = " << (int) ev->data.connect.dest.client << ":"
<< (int) ev->data.connect.dest.port
<< std::endl;
#endif
break;
case SND_SEQ_EVENT_QFRAME: // MIDI time code
if ( !( data->ignoreFlags & 0x02 ) ) doDecode = true;
break;
case SND_SEQ_EVENT_TICK: // MIDI timing tick
if ( !( data->ignoreFlags & 0x02 ) ) doDecode = true;
break;
case SND_SEQ_EVENT_SENSING: // Active sensing
if ( !( data->ignoreFlags & 0x04 ) ) doDecode = true;
break;
case SND_SEQ_EVENT_SYSEX:
if ( (data->ignoreFlags & 0x01) ) break;
if ( ev->data.ext.len > apiData->bufferSize ) {
apiData->bufferSize = ev->data.ext.len;
free( buffer );
buffer = (unsigned char *) malloc( apiData->bufferSize );
if ( buffer == NULL ) {
data->doInput = false;
std::cerr << "\nRtMidiIn::alsaMidiHandler: error resizing buffer memory!\n\n";
break;
}
}
default:
doDecode = true;
}
if ( doDecode ) {
nBytes = snd_midi_event_decode( apiData->coder, buffer, apiData->bufferSize, ev );
if ( nBytes > 0 ) {
// The ALSA sequencer has a maximum buffer size for MIDI sysex
// events of 256 bytes. If a device sends sysex messages larger
// than this, they are segmented into 256 byte chunks. So,
// we'll watch for this and concatenate sysex chunks into a
// single sysex message if necessary.
if ( !continueSysex )
message.bytes.assign( buffer, &buffer[nBytes] );
else
message.bytes.insert( message.bytes.end(), buffer, &buffer[nBytes] );
continueSysex = ( ( ev->type == SND_SEQ_EVENT_SYSEX ) && ( message.bytes.back() != 0xF7 ) );