summaryrefslogtreecommitdiff
path: root/support/mid2tex/src/readmidi.c
blob: 4d272ac67032d335fbdebb3615d35b732fd1ef34 (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
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
/***************************/
/* readmidi.c              */
/***************************/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "midi.h"
#include "maintypes.h"
#include "defines.h"
#include "readmidi.h"

#ifdef DEBUG
static void ausgabe()
{
	printf("MThd = %s, chunk_length = %d\n", head.MThd , head.chunk_length);
	printf("format = %d, tracks = %d, per_quarter = %x\n",
		head.format, head.tracks, head.per_quarter);

	printf("Mtrk = %s, Track_chunk_length = %d\n", 
		THead.MTrk, THead.chunk_length);
}
#endif 

static unsigned long get_valid_time(ti)
	unsigned long ti;
{
	if (ti < bartime) {
		if (ti < lastbartime) {
			converter = 0;
			sequencecounter = 0;
		}
		else {
			converter = lastbartime;
			sequencecounter = (double) lastbartime;
		}
	}
	else {
		converter = bartime;
		sequencecounter = (double) bartime;
	}
	while (ti > converter) {
		lastsc = sequencecounter;
		sequencecounter += one64tel;
		converter = (unsigned long) sequencecounter;
	}
	if (ti < converter) ti = (unsigned long) lastsc;
	return(ti);
}

static char midi_getc(fpointer)
	FILE *fpointer;
{
	if (THead.chunk_length-- < 0) {
		fprintf(stderr, "midi_getc: Length Underflow\n");
		exit(10);
	}
	return(getc(fpointer));
}

static void midi_ungetc(c, fpointer)
	FILE *fpointer;
	char c;
{
	THead.chunk_length++;
	ungetc(c, fpointer);
}

static unsigned int ReadVarLen()
{
	unsigned int value;
	unsigned char c;

	if ((value = midi_getc(fp)) & 0x80) {
		value  &= 0x7f;
		do {
			value = (value << 7) + ((c = midi_getc(fp)) & 0x7f);
		}
		while (c & 0x80);
	}

	return(value);
}


static void ReadMidiTrackName(delta)
	int delta;
{
	int len, i;

	len = ReadVarLen();
	for (i = 0; i < len; i++) {
		if (i < 80 - 1) TrackName[Track_Nr][i] = midi_getc(fp);
		else midi_getc(fp);
	}
	if (i<80) TrackName[Track_Nr][i] = '\0';
	else TrackName[Track_Nr][79] = '\0';

#ifdef DEBUG
	printf("MIDI_TRACK_NAME (%s) at %d\n", TrackName[Track_Nr], delta);
#endif

}

static void ReadMidiSequSpec(delta)
	int delta;
{
	int len, i;
	char Str[80];
#ifdef DEBUG
	int j;
#endif

	len = ReadVarLen();
	for (i = 0; i < len; i++) {
		if (i < 80 - 1) Str[i] = midi_getc(fp);
	}
	Str[i] = '\0';
#ifdef DEBUG
	printf("MIDI_SEQUENCER_SPECIFIC at %d:\n", delta);
	for (j = 0; j < i; j++)
		printf("\t0x%x\n", Str[j]);
#endif
}

#ifdef DEBUG
static char *p2str(oct, pit)
	int oct, pit;
{
	static char Str[10];
	static char *p_table[12] = {"C", "Cis", "D", "Dis",
				   "E",  "F",  "Fis", "G",
				   "Gis", "A", "B",  "H"};

	sprintf(Str, "%s%d", p_table[pit], oct);
	return(Str);
}
#endif

static void ReadMidiToneVal(oct, pit, laut)
	int *oct, *pit, *laut;
{
	int w;
	unsigned char inthelp;

	w = midi_getc(fp);
	*laut = midi_getc(fp);

	/* allow only octaves 0 - 5 */
	if ((w>24) && (w<95)) {
		*oct = (w / 12) - 2;
		*pit = (w % 12);
	}
	else {
		*oct = 6;
		*pit = 0;
	}

	inthelp = 12 * (*oct) + (*pit);
	if (max[Track_Nr] < inthelp) max[Track_Nr] = inthelp;
	if (min[Track_Nr] > inthelp) min[Track_Nr] = inthelp;
}

static void erzeuge_note(octave, pitch, laut, begin, dauer, channel)
	int octave, pitch, laut, dauer, channel;
	unsigned long int begin;
{
	if (firstnotetimeflag == -1) {
		firstnotetime = begin;
		firstnotetimeflag = 0;
	}
	/* if there were no TimeSig */
	if ((valid == 0) && (begin > firstnotetime)) {
		valid++;
		if ((!printonly) || (Track_Nr == (printonly -1))) {
			if ((!notes_flag) && (nom0) && (Track_Nr))
				ins_dyn_event(Track_Nr, 't', 0, nom0, denom0, 0, 0, 0, 0, 0);
			else
				ins_dyn_event(Track_Nr, 't', 0, 4, 4, 0, 0, 0, 0, 0);
		}
	}

	/* if there were no KeySig */
	if ((valid2 == 0) && (begin > firstnotetime)) {
		valid2++;
		if ((!printonly) || (Track_Nr == (printonly -1))) {
			if ((!notes_flag) && (key0) && (Track_Nr))
				ins_dyn_event(Track_Nr, 'k', 0, key0, 0, 0, 0, 0, 0, 0);
			else
				ins_dyn_event(Track_Nr, 'k', 0, 0, 0, 0, 0, 0, 0, 0);
		}
	}

#ifdef DEBUG
	fprintf(stdout, "NOTE into dyn_event_list inserted\n");
	fprintf(stdout, "oct: %d\t pit: %d\t laut: %x\t beg: %lx\t durat: %x\n",
		octave, pitch, laut, begin, dauer);
#endif
	/* notes_flag shows that notes of first track were read	*/
	/*							*/
	/* because f.e. rosegarden writes empty first track 	*/
	/* with takt and key info for all other tracks		*/

	if (Track_Nr == 0) notes_flag = 1;

	if (((!printonly) || (Track_Nr == (printonly -1))) && (octave != 6))
		ins_dyn_event(Track_Nr, 'n', 0, 0, 0, octave, pitch, laut, get_valid_time(begin), dauer);
}
	
static void ReadMidiNoteOff(channel, delta)
	int channel, delta;
{
	int dauer, octave, pitch, laut, la;
	unsigned long int begin;

	ReadMidiToneVal(&octave, &pitch, &laut);

#ifdef DEBUG
	printf("MIDI_NOTE_OFF at %d(%ld): Channel: %d, pitch = %s, laut = 0x%x\n",
		delta, zeit, channel, p2str(octave, pitch), laut);
#endif
	dauer = note_delete(octave, pitch, &la, zeit, &begin, channel);
#ifdef DEBUG
	printf("Generate_Note with begin = %ld, absolute time = %ld, duration = %d\n",
			begin, zeit, dauer);
#endif
	erzeuge_note(octave, pitch, la, begin, dauer, channel);
}

static void ReadMidiNoteOn(channel, delta)
	int channel, delta;
{
	int dauer, octave, pitch, laut, la;
	unsigned long int begin;

	ReadMidiToneVal(&octave, &pitch, &laut);

	if (laut) {
		note_insert(octave, pitch, laut, zeit, channel);
	}
	else {
		dauer = note_delete(octave, pitch, &la, zeit, &begin, channel);
#ifdef DEBUG
		printf("Generate_Note with begin = %ld, absolute time = %ld, duration = %d\n",
				begin, zeit, dauer);
#endif
		erzeuge_note(octave, pitch, la, begin, dauer, channel);
	}
#ifdef DEBUG
	printf("MIDI_NOTE_ON at %d(%ld): Channel: %d, pitch = %s, laut = 0x%x\n",
		delta, zeit, channel, p2str(octave, pitch), laut);
#endif
}

static void ReadMidiPolyAftertouch(channel, delta)
	int channel, delta;
{
	char dum1, dum2;

	dum1 = midi_getc(fp); dum2 = midi_getc(fp);
#ifdef DEBUG
	printf("MIDI_POLY_AFTERTOUCH: 0x%x, 0x%x, 0x%x\n", channel, dum1, dum2);
#endif
}

static void ReadMidiCtrlChange(channel, delta)
	int channel, delta;
{
	char dum1, dum2;

	dum1 = midi_getc(fp); dum2 = midi_getc(fp);
#ifdef DEBUG
	printf("MIDI_CTRL_CHANGE: 0x%x, 0x%x, 0x%x\n", channel, dum1, dum2);
#endif
}

static void ReadMidiProgChange(channel, delta)
	int channel, delta;
{
	char dum1;

	dum1 = midi_getc(fp);
#ifdef DEBUG
	printf("MIDI_PROG_CHANGE: 0x%x, 0x%x\n", channel, dum1);
#endif
}

static void ReadMidiChnlAftertouch(channel, delta)
	int channel, delta;
{
	char dum1;

	dum1 = midi_getc(fp);
#ifdef DEBUG
	printf("MIDI_CHNL_AFTERTOUCH: 0x%x, 0x%x\n", channel, dum1);
#endif
}

static void ReadMidiPitchBend(channel, delta)
	int channel, delta;
{
	char dum1, dum2;

	dum1 = midi_getc(fp); dum2 = midi_getc(fp);
#ifdef DEBUG
	printf("MIDI_PITCH_BEND: 0x%x, 0x%x, 0x%x\n", channel, dum1, dum2);
#endif
}

static void ReadMidiSongPositionPtr(delta)
	int delta;
{
	char dum1, dum2;

	dum1 = midi_getc(fp); dum2 = midi_getc(fp);
#ifdef DEBUG
	printf("MIDI_SONG_POSITION_PTR: 0x%x, 0x%x\n", dum1, dum2);
#endif
}

static void ReadMidiSongSelect(delta)
	int delta;
{
	char dum1;

	dum1 = midi_getc(fp);
#ifdef DEBUG
	printf("MIDI_SONG_SELECT: 0x%x\n", dum1);
#endif
}

static void ReadMidiSystemExclusive()
{
	int dum;
	unsigned int value;

	dum = ReadVarLen();
	while ((value = midi_getc(fp)) != MIDI_EOX);
#ifdef DEBUG
	printf("MIDI_SYSTEM_EXCLUSIVE\n");
#endif
}

static void ReadMidiSetTempo(delta)
	int delta;
{
	unsigned int len, tempo;

	len = midi_getc(fp);
	if (len == 0x03) {
		tempo = 0;
		while(len--) {
			tempo *= 0x100;
			tempo += (unsigned int) (0xff & midi_getc(fp));
		}
#ifdef DEBUG
		D_Tempo = (double) tempo / 1000000.0;
		printf("MIDI_SET_TEMPO at %d: Tempo = %d(%f)\n", delta, tempo, D_Tempo);
#endif
	}
	else { /* system reset detect */
		midi_ungetc(len, fp);
		midi_ungetc(0x51, fp);
	}
}

static void ReadMidiTimeSig(delta)
	int delta;
{
	int dummy, nn, dd, cc, bb, dominator;

	dummy = midi_getc(fp);
	if (dummy == 0x04) {
		valid = 1;	/* means: TimeSig detected */
		nn = midi_getc(fp);
		dd = midi_getc(fp);
		cc = midi_getc(fp);
		bb = midi_getc(fp);
		dominator = (1 << dd);
		help = taktzeit;
		taktzeit = head.per_quarter * nn * 4 / dominator;
		diskrete_tz = diskrete_tz + taktzeit - help;
		if ((!Track_Nr) && (!nom0)) {
			nom0 = nn;
			denom0 = dominator;
		}
		if ((!printonly) || (Track_Nr == (printonly -1)))
			ins_dyn_event(Track_Nr, 't', 0, nn, dominator, 0, 0, 0, get_valid_time(zeit), 0);
		
#ifdef DEBUG
		printf("Takt: %x\n",taktzeit);
		printf("MIDI_TIME_SIGNATURE at %d: Takt:%d/%d\nMIDI-clocks per Metronom: %d,",
			delta, nn, dominator, cc);
		printf("%d 32nd per MIDI-Quarter\n", bb);
#endif
	}
	else { /* system reset detect */
		midi_ungetc(dummy, fp);
		midi_ungetc(0x58, fp);
	}
}

static void ReadMidiTextEvent(delta)
	int delta;
{
	unsigned int len;
	int value;

	len = ReadVarLen();
	while (len--) value = midi_getc(fp);
#ifdef DEBUG
	printf("MIDI_TEXT_EVENT\n");
#endif
}

static void ReadMidiCopyrightNotice(delta)
	int delta;
{
	unsigned int len;
	int value;

	len = ReadVarLen();
	while (len--) value = midi_getc(fp);
#ifdef DEBUG
	printf("MIDI_COPYRIGHT_NOTICE\n");
#endif
}

static void ReadMidiInstrumentName(delta)
	int delta;
{
	unsigned int len;
	int value=0;

	len = ReadVarLen();
	while (len--) Staffs[Track_Nr][value++] = midi_getc(fp);
	Staffs[Track_Nr][value] = 0;
#ifdef DEBUG
	printf("MIDI_INSTRUMENT_NAME: %s\n",Staffs[Track_Nr]);
#endif
}

static void ReadMidiLyrik(delta)
	int delta;
{
	unsigned int len;
	char *ptr, *ptrhelp;

	len = ReadVarLen();
	if ((ptr = (char *) malloc (len+1)) == NULL) {
		fprintf(stderr, "mallocC error\n");
		exit(10);
	}
	ptrhelp = ptr;
	while (len--) {
		*ptrhelp = midi_getc(fp);
		ptrhelp++;
	}
	*ptrhelp = 0;
#ifdef DEBUG
	printf("MIDI_LYRIC\n");
#endif
	if ((!printonly) || (Track_Nr == (printonly -1)))
		ins_dyn_event(Track_Nr, 'l', ptr, 0, 0, 0, 0, 0, get_valid_time(zeit), 0);
}

static void ReadMidiTextMarker(delta)
	int delta;
{
	unsigned int len;
	int value;

	len = ReadVarLen();
	while (len--) value = midi_getc(fp);
#ifdef DEBUG
	printf("MIDI_TEXT_MARKER\n");
#endif
}

static void ReadMidiCuePoint(delta)
	int delta;
{
	unsigned int len;
	int value;

	len = ReadVarLen();
	while (len--) value = midi_getc(fp);
#ifdef DEBUG
	printf("MIDI_CUE_POINT\n");
#endif
}

static void ReadMidiChannelPrefix(delta)
	int delta;
{
	int dum1, dum2;
	dum1 = midi_getc(fp);
	if (dum1 == 0x01) {
		dum2 = midi_getc(fp);
#ifdef DEBUG
	printf("MIDI_CHANNEL_PREFIX\n");
#endif
	}
	else { /* system reset detect */
		midi_ungetc(dum1, fp);
		midi_ungetc(0x20, fp);
	}
}

static void ReadMidiSmpteOffset(delta)
	int delta;
{
	int dum;

	if (delta != 0) { /* system reset detect */
		midi_ungetc(0x54, fp);
	}
	else {
		dum = midi_getc(fp);
		if (dum == 0x05) {
			midi_getc(fp); midi_getc(fp); midi_getc(fp);
			midi_getc(fp); midi_getc(fp);
#ifdef DEBUG
	printf("MIDI_SMPTE_OFFSET\n");
#endif
		}
		else { /* system reset detect */
			midi_ungetc(dum, fp);
			midi_ungetc(0x54, fp);
		}
	}
}

static void ReadMidiSequenceNumber(MetaEvent, delta)
	int delta;
	unsigned char MetaEvent;
{
	int value;

	value = midi_getc(fp);
	if (value != 0x02) { /* system reset detect */
		midi_ungetc(value, fp);
		midi_ungetc(0x00, fp);
	}
	else {
		value = midi_getc(fp); value = midi_getc(fp);
		value = midi_getc(fp); value = midi_getc(fp);
#ifdef DEBUG
		printf("MIDI_SEQUENCE_NUMBER\n");
#endif
	}
}

static void ReadMidiKeySig(delta)
	int delta;
{
	int dum, sign;

	dum = midi_getc(fp);
	if (dum != 0x02) { /* system reset detect */
		midi_ungetc(dum, fp);
		midi_ungetc(0x59, fp);
	}
	else {
		valid2 = 1; /* KeySig detected */
		sign = midi_getc(fp);
		/* manipulate sign */
		if ((sign & 0x80) && (sign & 0x08)) {
			sign = sign ^ 0xf;
			sign++;
		}
		if ((!Track_Nr) && (!key0)) key0 = sign;
		if ((!printonly) || (Track_Nr == (printonly -1)))
			ins_dyn_event(Track_Nr, 'k', 0, sign, 0, 0, 0, 0, get_valid_time(zeit), 0);
		T_genus = (0xff & sign);
		Signature = (0xff & midi_getc(fp));
#ifdef DEBUG
		printf("MIDI_KEY_SIGNATURE at %d: T_genus = ", delta);
		switch (T_genus)  {
			case MINOR: printf("MINOR"); break;
			case MAJOR: printf("MAJOR"); break;
			default: printf("unknown"); break;
		}
		printf(" Signature = %d\n", Signature);
#endif
	}
}

static void ReadMidiEndOfTrack(delta)
	int delta;
{
	int dum, dauer, octave, pitch, laut, channel;
	unsigned long int begin;

	dum = midi_getc(fp);
	if (dum == 0) {
		dum = midi_getc(fp);	/* read - deltatime */
		while (dum == 0) {	/* falls nach EOTrack noch Folgeelement */
			midi_ungetc(dum, fp);
			ReadEvent();
			dum = midi_getc(fp);
		}
		midi_ungetc(dum, fp);
		while ((dauer = search_note(&octave, &pitch, &laut, zeit, &begin, &channel)) != -1) {
#ifdef DEBUG
			printf("erzeuge_note mit begin = %ld, zeit = %ld, dauer = %d\n",
				begin, zeit, dauer);
#endif
			erzeuge_note(octave, pitch, laut, begin, dauer, channel);
		}

		if (THead.chunk_length) {
			fprintf(stderr, "Warning: ReadMidiEndOfTrack: Sync_Error THead.chunk_length = %d\n",
			THead.chunk_length);
			while (THead.chunk_length >= 0) midi_getc(fp);
		}
#ifdef DEBUG
		printf("MIDI_END_OF_TRACK at %d\n", delta);
#endif
	}
	else { /* system reset detect */
		midi_ungetc(dum, fp);
		midi_ungetc(0x2f, fp);
	}
}

static int ReadMidiMetaEvent(delta)
	int delta;
{
	unsigned char MetaEvent;
	int not_eot = 1;

	switch(MetaEvent = midi_getc(fp)) {
		case MIDI_SEQUENCE_NUMBER: ReadMidiSequenceNumber(MetaEvent,delta); break;
		case MIDI_TEXT_EVENT: ReadMidiTextEvent(delta); break;
		case MIDI_TRACK_NAME: ReadMidiTrackName(delta); break;
		case MIDI_SET_TEMPO: ReadMidiSetTempo(delta); break;
		case MIDI_TIME_SIGNATURE: ReadMidiTimeSig(delta); break;
		case MIDI_END_OF_TRACK: ReadMidiEndOfTrack(delta); not_eot = 0; break;
		case MIDI_KEY_SIGNATURE: ReadMidiKeySig(delta); break;
		case MIDI_SEQUENCER_SPECIFIC: ReadMidiSequSpec(delta); break;
		case MIDI_CHANNEL_PREFIX: ReadMidiChannelPrefix(delta); break;
		case MIDI_SMPTE_OFFSET: ReadMidiSmpteOffset(delta); break;
		case MIDI_COPYRIGHT_NOTICE: ReadMidiCopyrightNotice(delta); break;
		case MIDI_INSTRUMENT_NAME: ReadMidiInstrumentName(delta); break;
		case MIDI_LYRIC: ReadMidiLyrik(delta); break;
		case MIDI_TEXT_MARKER: ReadMidiTextMarker(delta); break;
		case MIDI_CUE_POINT: ReadMidiCuePoint(delta); break;
		default: /* system reset detect */
			midi_ungetc(MetaEvent, fp); break;
	}
	return(not_eot);
}

static int ReadEvent()
{
	unsigned char Event_Type;
	int delta, not_eot = 1;

	delta = ReadVarLen();
	zeit += delta;

	while (zeit >= diskrete_tz) {
		if ((!printonly) || (Track_Nr == (printonly -1))) {
			lastbartime = bartime;
			bartime = diskrete_tz;
			ins_dyn_event(Track_Nr, 'b', 0, 0, 0, 0, 0, 0, diskrete_tz, taktzeit);
		}
		diskrete_tz += taktzeit;
	}

	Event_Type = midi_getc(fp);
r_event:
	if ((0xf0 & Event_Type) == MIDI_NOTE_OFF) {
		ReadMidiNoteOff((Event_Type & 0xf), delta);
	}
	else if ((0xf0  & Event_Type) ==  MIDI_NOTE_ON) {
		ReadMidiNoteOn((Event_Type & 0xf), delta);
	}
	else if ((0xf0  & Event_Type) ==  MIDI_POLY_AFTERTOUCH) {
		ReadMidiPolyAftertouch((Event_Type & 0xf), delta);
	}
	else if ((0xf0  & Event_Type) ==  MIDI_CTRL_CHANGE) {
		ReadMidiCtrlChange((Event_Type  & 0xf), delta);
	}
	else if ((0xf0  & Event_Type) ==  MIDI_PROG_CHANGE) {
		ReadMidiProgChange((Event_Type  & 0xf), delta);
	}
	else if ((0xf0  & Event_Type) ==  MIDI_CHNL_AFTERTOUCH) {
		ReadMidiChnlAftertouch((Event_Type & 0xf), delta);
	}
	else if ((0xf0  & Event_Type) ==  MIDI_PITCH_BEND) {
		ReadMidiPitchBend((Event_Type & 0xf), delta);
	}
	else if ((0xf0  & Event_Type) ==  MIDI_SYSTEM_MSG) {
		if (Event_Type == MIDI_FILE_META_EVENT) {
			not_eot = ReadMidiMetaEvent(delta);
		}
		else {
			/* treatment of all other 0xfx-events */
			switch (0xf & Event_Type) {
				case MIDI_SONG_POSITION_PTR: /* 0xf2 */
					ReadMidiSongPositionPtr(delta);
					break;
				case MIDI_SONG_SELECT: /* 0xf3 */
					ReadMidiSongSelect(delta);
					break;
				case MIDI_SYSTEM_EXCLUSIVE: /* 0xf0 */
					ReadMidiSystemExclusive();
					break;
				case MIDI_TUNE_REQUEST: /* 0xf6 */
				case MIDI_TIMING_CLOCK: /* 0xf8 */
				case MIDI_START: /* 0xfa */
				case MIDI_CONTINUE: /* 0xfb */
				case MIDI_STOP: /* 0xfc */
				case MIDI_ACTIVE_SENSING: /* 0xfe */
					midi_getc(fp);
					break;
				default: 
					fprintf(stderr, "Event: 0x%x unknown\n", Event_Type);
					fprintf(stderr, "Fileoffset: %lu\n", ftell(fp));
					exit(10);
			}
		}
	}
	else if (Running_Event) {
#ifdef DEBUG
		printf("Running Event\n");
#endif
		midi_ungetc(Event_Type, fp);

		Event_Type = Running_Event;
		goto r_event;
	}
	else {
		fprintf(stderr, "Event: 0x%x unknown\n", Event_Type);
		fprintf(stderr, "Fileoffset: %lu\n", ftell(fp));
		exit(10);
	}
	Running_Event = Event_Type;
	return(not_eot);
}
		
	
static void read_track()
{
	zeit = 0;
	THead.MTrk[0] = getc(fp); THead.MTrk[1] = getc(fp);
	THead.MTrk[2] = getc(fp); THead.MTrk[3] = getc(fp);
	THead.MTrk[4] = '\0';
	if (strcmp(THead.MTrk, MIDI_TRACK_HEADER)) {
		fprintf(stderr, "read_track: Sync_error(%s)\n", THead.MTrk);
		exit(10);
	}
	THead.chunk_length  = 0x1000000 * getc(fp);
	THead.chunk_length += 0x10000 * getc(fp);
	THead.chunk_length += 0x100 * getc(fp);
	THead.chunk_length += getc(fp);
#ifdef DEBUG
	ausgabe();
#endif
	Running_Event = 0;
	while (ReadEvent()); 
}

static void usage(conststrg)
	char *conststrg;
{
	fprintf(stderr,"usage:\t%s [-<nr>] <midifile> [<texfile>]\n", conststrg);
	fprintf(stderr,"\t%s -c <midifile>\n", conststrg);
	exit(10);
}

void main(argc, argv)
	int argc;
	char *argv[];
{
	int lenhelp;
	char opthelp;

	if (argc < 2) usage(argv[0]);

	if ((argc == 3) && (!strcmp(argv[1],"-c"))) {
		if ((fp = fopen(argv[2], "r")) == NULL) {
			fprintf(stderr, "cannot open %s\n", argv[1]);
			exit(10);
		}
		count = 1;
	}
	else {
		count = 0;
		if (*argv[1] == '-') {
			if ((argc == 2) || (*argv[2] == '-') || (argc > 4)) usage(argv[0]);
			opthelp = 1;
			printonly = (char) atoi((argv[1])+1);
			if (!printonly) printonly = 20;
		}
		else {
			if (argc > 3) usage(argv[0]);
			printonly = 0;	/* print every track */
			opthelp = 0;
		}

		if ((fp = fopen(argv[1+opthelp], "r")) == NULL) {
			fprintf(stderr, "cannot open %s\n", argv[1+opthelp]);
			exit(10);
		}

		/* fill the array for the name of tex file */
		if (argc == (3+opthelp)) {
			if (!strcmp(argv[1+opthelp], argv[2+opthelp])) {
				fprintf(stderr, "cannot process one file to itself\n");
				exit(10);
			}
			strcpy(texfilename, argv[2+opthelp]);
		}
		else {	/* mainmark1: try to select a nice name for texfile */
			strcpy(texfilename, argv[1+opthelp]);
			lenhelp = strlen(texfilename) - 4;

			/* delete midi file extension */
			if ((!strcmp(&(texfilename[lenhelp]),".mid")) ||
			    (!strcmp(&(texfilename[lenhelp]),".MID")))
				texfilename[lenhelp] = 0;
			else {
				if ((!strcmp(&(texfilename[lenhelp+1]),".mf")) ||
				    (!strcmp(&(texfilename[lenhelp+1]),".MF")))
					texfilename[lenhelp+1] = 0;
			}
			if ((texfilename[0] > 64) && (texfilename[0] < 91))
				strcat(texfilename, ".TEX");
			else
				strcat(texfilename, ".tex");
		}

	}

	/* mainmark2 */
	head.MThd[0] = getc(fp); head.MThd[1] = getc(fp);
	head.MThd[2] = getc(fp); head.MThd[3] = getc(fp); head.MThd[4] = '\0';
	if (strcmp(head.MThd, MIDI_FILE_HEADER)) {
		fprintf(stderr, "specified file probably not a midi-file or corrupted\n");
		exit(10);
	}

	head.chunk_length = 0x1000000 * getc(fp);
	head.chunk_length += 0x10000 * getc(fp);
	head.chunk_length += 0x100 * getc(fp);
	head.chunk_length += getc(fp);

	if (head.chunk_length != 6) {
		fprintf(stderr, "wrong header chunk length\n");
		exit(10);
	}

	head.format = 0x100 * getc(fp); head.format += getc(fp);
	head.tracks = 0x100 * getc(fp); head.tracks += getc(fp);

	/* mainmark3 */
	if (count) {
		printf("%d tracks detected\n", head.tracks);
		exit(0);
	}

	if (printonly && (printonly > head.tracks)) {
		printf("can't build tex-file of specified track \n");
		exit(0);
	}

	if ((!printonly) && ((head.tracks) > 9))
		fprintf(stderr, "Warning: printing out so many tracks together may look very ugly\n");

	head.per_quarter = 0x100 * (0xff & getc(fp));
	head.per_quarter += (0xff & getc(fp));
	if (head.format != 1) {
		fprintf(stderr, "Format %d not supported\n", head.format);
		exit(10);
	}

	if (head.per_quarter & 0x8000) {
		fprintf(stderr, "SMPTE-Time Code not supported\n");
		exit(10);
	}

	/* mainmark4 */
	one64tel = (double) head.per_quarter / 16;

	/* mainmark5 */
	nom0 = 0;
	key0 = 0;
	notes_flag = 0;
	for (lenhelp = 0; lenhelp < MAXTRACKS; lenhelp++) {
		Staffs[lenhelp][0]=0;
		max[lenhelp]=0;
		min[lenhelp]=255;
	}
	taktzeit = 4 * head.per_quarter;
	dyn_init();

	/* mainmark6 */
	if (!printonly)
		for (Track_Nr = 0; Track_Nr < head.tracks; Track_Nr++) {
			valid = 0;      /* no TimeSig */
			valid2 = 0;	/* no KeySig  */

			/* following variables allow event begin only at fixed time-points */
			lastbartime = 0;
			bartime = 0;

			firstnotetimeflag = -1;
			diskrete_tz = taktzeit;
			read_track();
			if (min[Track_Nr] > 0x1f) region[Track_Nr] = 1;
			else	if (max[Track_Nr] < 0x2a) region[Track_Nr] = 2;
				else region[Track_Nr] = 0;
#ifdef DEBUG
			printf("region: %x min: %x max: %x\n", region[Track_Nr], min[Track_Nr], max[Track_Nr]);
			printf("call now split_notes()\n");
#endif
			split_notes(Track_Nr, head.per_quarter);
#ifdef DEBUG
			printf("call now detect_accords()\n");
#endif
			detect_accords(region[Track_Nr], Track_Nr);
#ifdef DEBUG
			printf("call now insert_notetimes_and_slurs()\n");
#endif
			insert_notetimes_and_slurs(region[Track_Nr], Track_Nr, head.per_quarter);
#ifdef DEBUG
			printf("call now detect_note_positions_with_signs()\n");
#endif
			detect_note_positions_with_signs(Track_Nr);
#ifdef DEBUG
			printf("call now set_slur_regions()\n");
#endif
			set_slur_regions(Track_Nr);
#ifdef DEBUG
			printf("call now reset_treat_info()\n");
#endif
			reset_treat_info(Track_Nr);
#ifdef DEBUG
			printf("call now beam_detect()\n");
#endif
			beam_detect(region[Track_Nr], Track_Nr);
#ifdef DEBUG
			printf("call now set_beam_regions()\n");
#endif
			set_beam_regions(Track_Nr);
#ifdef DEBUG
			printf("call now reset_treat_info()\n");
#endif
			reset_treat_info(Track_Nr);
#ifdef DEBUG
			printf("call now slur_geometry()\n");
#endif
			slur_geometry(Track_Nr);
#ifdef DEBUG
			printf("call now detect_rests()\n");
#endif
			detect_rests(Track_Nr, region[Track_Nr], head.per_quarter);
#ifdef DEBUG
			printf("call now reset_treat_info()\n");
#endif
			reset_treat_info(Track_Nr);
#ifdef DEBUG
			printf("call now beam_geometry()\n");
#endif
			beam_geometry(Track_Nr);
#ifdef DEBUG
			printf("call now reset_treat_info()\n");
#endif
			reset_treat_info(Track_Nr);
#ifdef DEBUG
			printf("call now calculate_rest_positions()\n");
#endif
			calculate_rest_positions(Track_Nr);
#ifdef DEBUG
			printf("call now set_loudness_infos()\n");
#endif
			set_loudness_infos(Track_Nr);
		}
	else {
		for (Track_Nr = 0; Track_Nr < printonly; Track_Nr++) {
			valid = 0;      /* no TimeSig */
			valid2 = 0;     /* no KeySig  */

			/* following variables allow event begin only at fixed time-points */
			lastbartime = 0;
			bartime = 0;

			firstnotetimeflag = -1;
			diskrete_tz = taktzeit;
			read_track();
		}
		if ((printonly == 1) && (notes_flag == 0)) {
			fprintf(stderr, "sorry, first track is empty\n");
		}
		else {
			Track_Nr--;
			if (min[Track_Nr] > 0x1f) region[Track_Nr] = 1;
			else    if (max[Track_Nr] < 0x2a) region[Track_Nr] = 2;
				else region[Track_Nr] = 0;
#ifdef DEBUG
			printf("region: %x min: %x max: %x\n", region[Track_Nr], min[Track_Nr], max[Track_Nr]);
#endif
			split_notes(Track_Nr, head.per_quarter);
			detect_accords(region[Track_Nr], Track_Nr);
			insert_notetimes_and_slurs(region[Track_Nr], Track_Nr, head.per_quarter);
			detect_note_positions_with_signs(Track_Nr);
			set_slur_regions(Track_Nr);
			reset_treat_info(Track_Nr);
			beam_detect(region[Track_Nr], Track_Nr);
			set_beam_regions(Track_Nr);
			reset_treat_info(Track_Nr);
			slur_geometry(Track_Nr);
			detect_rests(Track_Nr, region[Track_Nr], head.per_quarter);
			reset_treat_info(Track_Nr);
			beam_geometry(Track_Nr);
			reset_treat_info(Track_Nr);
			calculate_rest_positions(Track_Nr);
			set_loudness_infos(Track_Nr);
		}
	}

#ifdef DEBUG
	debug_out();
#endif
	/* mainmark7 */
	if ((tfp = fopen(texfilename, "w")) ==  NULL) {
        	fprintf(stderr, "cannot open %s\n", texfilename);
        	exit(10);
        }

#ifdef DEBUG
	printf("writing texfile\n");
#endif
	write_texfile();
	fclose(fp); /* close MIDI-file */
	fclose(tfp); /* close TEX-file */
}