summaryrefslogtreecommitdiff
path: root/muse2/muse/midiseq.cpp
blob: 7d7dedef46c2641f29e9d7f7feaef342e4d675ed (plain)
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
//=========================================================
//  MusE
//  Linux Music Editor
//  $Id: midiseq.cpp,v 1.30.2.21 2009/12/20 05:00:35 terminator356 Exp $
//
//    high priority task for scheduling midi events
//
//  (C) Copyright 2003 Werner Schweer (ws@seh.de)
//=========================================================

#include <qmessagebox.h>
#include <qobject.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <poll.h>
#include <math.h>

#include "globals.h"
#include "midi.h"
#include "midiseq.h"
#include "midiport.h"
#include "mididev.h"
#include "midictrl.h"
#include "audio.h"
#include "driver/alsamidi.h"
#include "driver/jackmidi.h"
#include "sync.h"
#include "synth.h"
#include "song.h"
#include "gconfig.h"

MidiSeq* midiSeq;
int MidiSeq::ticker = 0;
volatile bool midiBusy=false;


//---------------------------------------------------------
//   readMsg
//---------------------------------------------------------

static void readMsg(void* p, void*)
      {
      
      MidiSeq* at = (MidiSeq*)p;
      at->readMsg();
      }

//---------------------------------------------------------
//   processMsg
//---------------------------------------------------------

void MidiSeq::processMsg(const ThreadMsg* m)
      {
      AudioMsg* msg = (AudioMsg*)m;
      switch(msg->id) {
            case MS_PROCESS:
                  audio->processMidi();
                  break;
            case SEQM_SEEK:
                  processSeek();
                  break;
            case MS_STOP:
                  processStop();
                  break;
            case MS_SET_RTC:
                  doSetuid();
                  setRtcTicks();
                  undoSetuid();
                  break;
            case MS_UPDATE_POLL_FD:
                  updatePollFd();
                  break;
            case SEQM_ADD_TRACK:
                  song->insertTrack2(msg->track, msg->ival);
                  updatePollFd();
                  break;
            case SEQM_REMOVE_TRACK:
                  song->cmdRemoveTrack(msg->track);
                  updatePollFd();
                  break;
            case SEQM_CHANGE_TRACK:
                  song->changeTrack((Track*)(msg->p1), (Track*)(msg->p2));
                  updatePollFd();
                  break;
            case SEQM_ADD_PART:
                  song->cmdAddPart((Part*)msg->p1);
                  break;
            case SEQM_REMOVE_PART:
                  song->cmdRemovePart((Part*)msg->p1);
                  break;
            case SEQM_CHANGE_PART:
                  //song->cmdChangePart((Part*)msg->p1, (Part*)msg->p2);
                  song->cmdChangePart((Part*)msg->p1, (Part*)msg->p2, msg->a, msg->b);
                  break;
            case SEQM_SET_TRACK_OUT_CHAN:
                  {
                  MidiTrack* track = (MidiTrack*)(msg->p1);
                  track->setOutChanAndUpdate(msg->a);
                  }
                  break;
            case SEQM_SET_TRACK_OUT_PORT:
                  {
                  MidiTrack* track = (MidiTrack*)(msg->p1);
                  track->setOutPortAndUpdate(msg->a);
                  }
                  break;
            case SEQM_REMAP_PORT_DRUM_CTL_EVS:
                    song->remapPortDrumCtrlEvents(msg->ival, msg->a, msg->b, msg->c);
                  break;
            case SEQM_CHANGE_ALL_PORT_DRUM_CTL_EVS:      
                    song->changeAllPortDrumCtrlEvents((bool)msg->a, (bool)msg->b);
                  break;
            case SEQM_SET_MIDI_DEVICE:
                  ((MidiPort*)(msg->p1))->setMidiDevice((MidiDevice*)(msg->p2));
                  updatePollFd();
                  break;
            case SEQM_IDLE:
                  idle = msg->a;
                  break;
            default:
                  printf("MidiSeq::processMsg() unknown id %d\n", msg->id);
                  break;
            }
      }

//---------------------------------------------------------
//   processStop
//---------------------------------------------------------

void MidiSeq::processStop()
      {
      // p3.3.28
      playStateExt = false; // not playing
      
      //
      //    stop stuck notes
      //
      for (iMidiDevice id = midiDevices.begin(); id != midiDevices.end(); ++id) {
            MidiDevice* md = *id;
            if (md->midiPort() == -1)
                  continue;
            MPEventList* pel = md->playEvents();
            MPEventList* sel = md->stuckNotes();
            pel->clear();
            for (iMPEvent i = sel->begin(); i != sel->end(); ++i) {
                  MidiPlayEvent ev = *i;
                  ev.setTime(0);
                  pel->add(ev);
                  }
            sel->clear();
            md->setNextPlayEvent(pel->begin());
            }
      }

//---------------------------------------------------------
//   processSeek
//---------------------------------------------------------

void MidiSeq::processSeek()
      {
      int pos = audio->tickPos();
      if (pos == 0 && !song->record())
            audio->initDevices();

      //---------------------------------------------------
      //    set all controller
      //---------------------------------------------------

      for (iMidiDevice i = midiDevices.begin(); i != midiDevices.end(); ++i) {
            MidiDevice* dev = *i;
            int port = dev->midiPort();
            if (port == -1)
                  continue;
            MidiPort* mp = &midiPorts[port];
            MidiCtrlValListList* cll = mp->controller();

            MPEventList* el = dev->playEvents();

            if (audio->isPlaying()) {
                  // stop all notes
                  el->clear();
                  MPEventList* sel = dev->stuckNotes();
                  for (iMPEvent i = sel->begin(); i != sel->end(); ++i) {
                        MidiPlayEvent ev = *i;
                        ev.setTime(0);
                        el->add(ev);
                        }
                  sel->clear();
                  }
            else
                  el->erase(el->begin(), dev->nextPlayEvent());
            
            for (iMidiCtrlValList ivl = cll->begin(); ivl != cll->end(); ++ivl) {
                  MidiCtrlValList* vl = ivl->second;
                  //int val = vl->value(pos);
                  //if (val != CTRL_VAL_UNKNOWN) {
                  //      int channel = ivl->first >> 24;
                  //      el->add(MidiPlayEvent(0, port, channel, ME_CONTROLLER, vl->num(), val));
                  //      }
                  iMidiCtrlVal imcv = vl->iValue(pos);
                  if(imcv != vl->end()) 
                  {
                    Part* p = imcv->second.part;
                    unsigned t = (unsigned)imcv->first;
                    // Do not add values that are outside of the part.
                    if(p && t >= p->tick() && t < (p->tick() + p->lenTick()) )
                      el->add(MidiPlayEvent(0, port, ivl->first >> 24, ME_CONTROLLER, vl->num(), imcv->second.val));
                  }
                }
            dev->setNextPlayEvent(el->begin());
            }
      }

//---------------------------------------------------------
//   MidiSeq
//---------------------------------------------------------

//MidiSeq::MidiSeq(int priority, const char* name)
//   : Thread(priority, name)
MidiSeq::MidiSeq(const char* name)
   : Thread(name)
      {
      // Changed by Tim. p3.3.17
      //prio = priority;
      prio = 0;
      
      idle = false;
      midiClock = 0;
      mclock1 = 0.0;
      mclock2 = 0.0;
      songtick1 = songtick2 = 0;
      lastTempo = 0;
      storedtimediffs = 0;
      playStateExt = false; // not playing
      doSetuid();
      timerFd=selectTimer();
      undoSetuid();

      }

//---------------------------------------------------------
//   ~MidiSeq
//---------------------------------------------------------

MidiSeq::~MidiSeq()
    {
    delete timer;
    }

//---------------------------------------------------------
//   selectTimer()
//   select one of the supported timers to use during this run
//---------------------------------------------------------

signed int MidiSeq::selectTimer()
    {
    int tmrFd;
    
    printf("Trying RTC timer...\n");
    timer = new RtcTimer();
    tmrFd = timer->initTimer();
    if (tmrFd != -1) { // ok!
        printf("got timer = %d\n", tmrFd);
        return tmrFd;
    }
    delete timer;
    
    printf("Trying ALSA timer...\n");
    timer = new AlsaTimer();
    tmrFd = timer->initTimer();
    if ( tmrFd!= -1) { // ok!
        printf("got timer = %d\n", tmrFd);
        return tmrFd;
    }
    delete timer;
    timer=NULL;
    QMessageBox::critical( 0, /*tr*/(QString("Failed to start timer!")),
              /*tr*/(QString("No functional timer was available.\n"
                         "RTC timer not available, check if /dev/rtc is available and readable by current user\n"
                         "Alsa timer not available, check if module snd_timer is available and /dev/snd/timer is available")));
    printf("No functional timer available!!!\n");
    exit(1);
    }

//---------------------------------------------------------
//   threadStart
//    called from loop()
//---------------------------------------------------------

void MidiSeq::threadStart(void*)
      {
      // Removed by Tim. p3.3.17
      /*
      struct sched_param rt_param;
      memset(&rt_param, 0, sizeof(rt_param));
      int prio_min = sched_get_priority_min(SCHED_FIFO);
      int prio_max = sched_get_priority_max(SCHED_FIFO);

      if (prio < prio_min) prio = prio_min;
      else if (prio > prio_max) prio = prio_max;

      rt_param.sched_priority = prio;
      int rv = pthread_setschedparam(pthread_self(), SCHED_FIFO, &rt_param);
      if (rv != 0)
            perror("set realtime scheduler");
      */

      int policy;
      if ((policy = sched_getscheduler (0)) < 0) {
            printf("Cannot get current client scheduler: %s\n", strerror(errno));
            }
      if (policy != SCHED_FIFO)
            printf("midi thread %d _NOT_ running SCHED_FIFO\n", getpid());
      updatePollFd();
      }

//---------------------------------------------------------
//   alsaMidiRead
//---------------------------------------------------------

static void alsaMidiRead(void*, void*)
      {
      // calls itself midiDevice->recordEvent(MidiRecordEvent):
      alsaProcessMidiInput();
      }

//---------------------------------------------------------
//   midiRead
//---------------------------------------------------------

static void midiRead(void*, void* d)
      {
      MidiDevice* dev = (MidiDevice*) d;
      dev->processInput();
      }

//---------------------------------------------------------
//   synthIRead
//---------------------------------------------------------

#if 0
static void synthIRead(void*, void* d)
      {
      SynthI* syn = (SynthI*) d;
      syn->processInput();
      }
#endif

//---------------------------------------------------------
//   midiWrite
//---------------------------------------------------------

static void midiWrite(void*, void* d)
      {
      MidiDevice* dev = (MidiDevice*) d;
      dev->flush();
      }

//---------------------------------------------------------
//   updatePollFd
//---------------------------------------------------------

void MidiSeq::updatePollFd()
      {
      if (!isRunning())
            return;

      clearPollFd();
      addPollFd(timerFd, POLLIN, midiTick, this, 0);

      if (timerFd == -1) {
            fprintf(stderr, "updatePollFd: no timer fd\n");
            if (!debugMode)
                  exit(-1);
            }

      addPollFd(toThreadFdr, POLLIN, ::readMsg, this, 0);

      //---------------------------------------------------
      //  midi ports
      //---------------------------------------------------

      for (iMidiDevice imd = midiDevices.begin(); imd != midiDevices.end(); ++imd) {
            MidiDevice* dev = *imd;
            int port = dev->midiPort();
            const QString name = dev->name();
            if (port == -1)
                  continue;
            if ((dev->rwFlags() & 0x2) || (extSyncFlag.value()
               //&& (rxSyncPort == port || rxSyncPort == -1))) {
               //&& (dev->syncInfo().MCIn()))) {
               && (midiPorts[port].syncInfo().MCIn()))) {
                  if(dev->selectRfd() < 0){
                    //fprintf(stderr, "WARNING: read-file-descriptor for {%s} is negative\n", name.latin1());
                  }
                  addPollFd(dev->selectRfd(), POLLIN, ::midiRead, this, dev);
                  }
            if (dev->bytesToWrite()){
                  if(dev->selectWfd() < 0){
                    //fprintf(stderr, "WARNING: write-file-descriptor for {%s} is negative\n", name.latin1());
                  }
                  addPollFd(dev->selectWfd(), POLLOUT, ::midiWrite, this, dev);
            }      
            }
      // special handling for alsa midi:
      // (one fd for all devices)
      //    this allows for processing of some alsa events
      //    even if no alsa driver is active (assigned to a port)
      addPollFd(alsaSelectRfd(), POLLIN, ::alsaMidiRead, this, 0);
      }

//---------------------------------------------------------
//   threadStop
//    called from loop()
//---------------------------------------------------------

void MidiSeq::threadStop()
      {
      timer->stopTimer();
      //timer.stopTimer();
      }

//---------------------------------------------------------
//   setRtcTicks
//    return true on success
//---------------------------------------------------------

bool MidiSeq::setRtcTicks()
      {

      //timer.setTimerFreq(config.rtcTicks);
      //timer.startTimer();
      timer->setTimerFreq(config.rtcTicks);
      timer->startTimer();
      realRtcTicks = config.rtcTicks;
      return true;
      }

//---------------------------------------------------------
//   start
//    return true on error
//---------------------------------------------------------

//bool MidiSeq::start()
void MidiSeq::start(int priority)
      {
      // Changed by Tim. p3.3.17
      
      prio = priority;
      
      //timerFd = -1;

      doSetuid();
      //timerFd = selectTimer(); 
      //timerFd = timer.initTimer();
      //printf("timerFd=%d\n",timerFd);
      setRtcTicks();
      undoSetuid();
      //Thread::start();
      Thread::start(priority);
      //return false;
      }

//---------------------------------------------------------
//   processMidiClock
//---------------------------------------------------------

void MidiSeq::processMidiClock()
      {
//      if (genMCSync) {
//            midiPorts[txSyncPort].sendClock();
//      }

/*      if (state == START_PLAY) {
            // start play on sync
            state      = PLAY;
            _midiTick  = playTickPos;
            midiClock  = playTickPos;

            int bar, beat, tick;
            sigmap.tickValues(_midiTick, &bar, &beat, &tick);
            midiClick      = sigmap.bar2tick(bar, beat+1, 0);

            double cpos    = tempomap.tick2time(playTickPos);
            samplePosStart = samplePos - lrint(cpos * sampleRate);
            rtcTickStart   = rtcTick - lrint(cpos * realRtcTicks);

            endSlice       = playTickPos;
            recTick        = playTickPos;
            lastTickPos    = playTickPos;

            tempoSN = tempomap.tempoSN();

            startRecordPos.setPosTick(playTickPos);
            }
*/
//      midiClock += config.division/24;
      }

//---------------------------------------------------------
//   midiTick
//---------------------------------------------------------

void MidiSeq::midiTick(void* p, void*)
      {
      MidiSeq* at = (MidiSeq*)p;
      at->processTimerTick();
      if (TIMER_DEBUG)
      {
        if(MidiSeq::ticker++ > 100)
          {
          printf("tick!\n");
          MidiSeq::ticker=0;
          }
        }
      }

//---------------------------------------------------------
//   processTimerTick
//---------------------------------------------------------

void MidiSeq::processTimerTick()
      {
      // Disabled by Tim. p3.3.22
//      extern int watchMidi;
//      ++watchMidi;      // make a simple watchdog happy

      //---------------------------------------------------
      //    read elapsed rtc timer ticks
      //---------------------------------------------------

      // This is required otherwise it freezes.
      unsigned long nn;
      if (timerFd != -1) {
            nn = timer->getTimerTicks();
            //nn = timer.getTimerTicks();
            nn >>= 8;
            }

      if (idle) {
//        printf("IDLE\n");
            return;
      }
      if (midiBusy) {
            // we hit audio: midiSeq->msgProcess
            // miss this timer tick
            return;
            }

      unsigned curFrame = audio->curFrame();
      
      // Keep the sync detectors running... 
      // No, done in Song::beat(), (at the much slower heartbeat rate).
      //
      //for(int port = 0; port < MIDI_PORTS; ++port)
      //{
        // Must keep them running even if there's no device...
        //if(midiPorts[port].device())
      //    midiPorts[port].syncInfo().setCurFrame(curFrame);
      //}  
      //for(iMidiDevice imd = midiDevices.begin(); imd != midiDevices.end(); ++imd) 
      //  (*imd)->syncInfo().setCurFrame(curFrame);
      
      if (!extSyncFlag.value()) {
            //int curTick = tempomap.frame2tick(curFrame);
            // Copied from Tempomap.
            //int curTick = lrint((double(curFrame)/double(sampleRate)) * tempomap.globalTempo() * config.division * 10000.0 / double(tempomap.tempo(song->cpos())));
            //int curTick = lrint((double(curFrame)/double(sampleRate)) * tempomap.globalTempo() * 240000.0 / double(tempomap.tempo(song->cpos())));
            int curTick = lrint((double(curFrame)/double(sampleRate)) * double(tempomap.globalTempo()) * double(config.division) * 10000.0 / double(tempomap.tempo(song->cpos())));
            //int curTick = int((double(curFrame)/double(sampleRate)) * double(tempomap.globalTempo()) * double(config.division * 10000.0) / double(tempomap.tempo(song->cpos())));
            
/*            if ( midiClock > curTick + 100) // reinitialize
                {
              midiClock = curTick;
                }
            else if( curTick > midiClock + 100) // reinitialize
                {
              midiClock = curTick;
                }*/
              
            if(midiClock > curTick)
              midiClock = curTick;
            
            int div = config.division/24;
            if(curTick >= midiClock + div)  {
            //if(curTick >= midiClock)  {
                  //processMidiClock();
                  int perr = (curTick - midiClock) / div;
                  //int perr = curTick - midiClock;
                  
                  bool used = false;
                  
                  //if(genMCSync)
                  //{ 
                    //midiPorts[txSyncPort].sendClock();
                    for(int port = 0; port < MIDI_PORTS; ++port)
                    {
                      MidiPort* mp = &midiPorts[port];
                      
                      // No device? Clock out not turned on?
                      //MidiDevice* dev = mp->device();
                      //if(!dev || !mp->syncInfo().MCOut())
                      if(!mp->device() || !mp->syncInfo().MCOut())
                        continue;
                        
                      // Shall we check open flags?
                      //if(!(dev->rwFlags() & 0x1) || !(dev->openFlags() & 1))
                      //if(!(dev->openFlags() & 1))
                      //  continue;
        
                      used = true;
                      
                      mp->sendClock();
                    }
                    
                    /*
                    for(iMidiDevice imd = midiDevices.begin(); imd != midiDevices.end(); ++imd) 
                    {
                      MidiDevice* dev = *imd;
                      
                      if(!dev->syncInfo().MCOut())
                        continue;
                        
                      // Shall we check open flags?
                      //if(!(dev->rwFlags() & 0x1) || !(dev->openFlags() & 1))
                      //if(!(dev->openFlags() & 1))
                      //  continue;
        
                      int port = dev->midiPort();
                      // Without this -1 check, interesting sync things can be done by the user without ever
                      //  assigning any devices to ports ! 
                      //if(port < 0 || port > MIDI_PORTS)
                      if(port < -1 || port > MIDI_PORTS)
                        continue;
                        
                      if(port == -1)
                      // Send straight to the device... Copied from MidiPort.
                      {
                        MidiPlayEvent event(0, 0, 0, ME_CLOCK, 0, 0);
                        dev->putEvent(event);
                      }  
                      else
                        // Go through the port...
                        midiPorts[port].sendClock();
                    }
                    */
                    
                    if(debugMsg && used && perr > 1)
                      printf("Dropped %d midi out clock(s). curTick:%d midiClock:%d div:%d\n", perr, curTick, midiClock, div);
                  //}
                    
                  // Keeping in mind how (receiving end) Phase Locked Loops (usually) operate...
                  // Increment as if we had caught the timer exactly on the mark, even if the timer
                  //  has passed beyond the mark, or even beyond 2 * div.
                  // If we missed some chances to send clock, resume the count where it would have been, 
                  //  had we not missed chances.
                  // We can't do anything about missed chances except send right away, and make up
                  //  for gained time by losing time in the next count...
                  // In other words, use equalization periods to counter gained/lost time, so that
                  //  ultimately, over time, the receiver remains in phase, despite any short dropouts / phase glitches.
                  // (midiClock only increments by div units).
                  //
                  // Tested: With midi thread set to high priority, very few clock dropouts ocurred (P4 1.6Ghz).
                  // But target device tick drifts out of phase with muse tick slowly over time, say 20 bars or so.
                  // May need more tweaking, possibly use round with/instead of lrint (above), and/or
                  //  do not use equalization periods - set midiClock to fractions of div.
                  // Tested: With RTC resolution at 1024, stability was actually better than with 8192!
                  // It stayed in sync more than 64 bars...
                  //
                  //
                  // Using equalization periods...
                  midiClock += (perr * div);
                  //midiClock += perr;
                  //
                  // No equalization periods... TODO:
                  //midiClock += (perr * div);
               }
            }

//      if (genMTCSync) {
            // printf("Midi Time Code Sync generation not impl.\n");
//            }

      // p3.3.25
      int tickpos = audio->tickPos();
      bool extsync = extSyncFlag.value();
      //
      // play all events upto curFrame
      //
      for (iMidiDevice id = midiDevices.begin(); id != midiDevices.end(); ++id) {
            MidiDevice* md = *id;
            // Is it a Jack midi device? p3.3.36 
            //MidiJackDevice* mjd = dynamic_cast<MidiJackDevice*>(md);
            //if(mjd)
            if(md->deviceType() == MidiDevice::JACK_MIDI)
              continue;
            if(md->isSynti())      // syntis are handled by audio thread
                  continue;
            int port = md->midiPort();
            MidiPort* mp = port != -1 ? &midiPorts[port] : 0;
            MPEventList* el = md->playEvents();
            if (el->empty())
                  continue;
            iMPEvent i = md->nextPlayEvent();
            for (; i != el->end(); ++i) {
                  // p3.3.25
                  // If syncing to external midi sync, we cannot use the tempo map.
                  // Therefore we cannot get sub-tick resolution. Just use ticks instead of frames.
                  //if (i->time() > curFrame) {
                  if (i->time() > (extsync ? tickpos : curFrame)) {
                        //printf("  curT %d  frame %d\n", i->time(), curFrame);
                        break; // skip this event
                        }

                  if (mp) {
                        if (mp->sendEvent(*i))
                              break;
                        }
                  else {
                        if (md->putEvent(*i))
                              break;
                        }
                  }
            md->setNextPlayEvent(i);
            }
      }

//---------------------------------------------------------
//   msgMsg
//---------------------------------------------------------

void MidiSeq::msgMsg(int id)
      {
      AudioMsg msg;
      msg.id = id;
      Thread::sendMsg(&msg);
      }

//---------------------------------------------------------
//   msgSetMidiDevice
//    to avoid timeouts in the RT-thread, setMidiDevice
//    is done in GUI context after setting the midi thread
//    into idle mode
//---------------------------------------------------------

void MidiSeq::msgSetMidiDevice(MidiPort* port, MidiDevice* device)
      {
      AudioMsg msg;
      msg.id = SEQM_IDLE;
      msg.a  = true;
      Thread::sendMsg(&msg);

      port->setMidiDevice(device);

      msg.id = SEQM_IDLE;
      msg.a  = false;
      Thread::sendMsg(&msg);
      }

void MidiSeq::msgProcess()      { msgMsg(MS_PROCESS); }
void MidiSeq::msgSeek()         { msgMsg(SEQM_SEEK); }
void MidiSeq::msgStop()         { msgMsg(MS_STOP); }
void MidiSeq::msgSetRtc()       { msgMsg(MS_SET_RTC); }
void MidiSeq::msgUpdatePollFd() { msgMsg(MS_UPDATE_POLL_FD); }