summaryrefslogtreecommitdiffstats
path: root/src/sound/MidiFile.cpp
blob: 509b3d362f197ec2ef51e59b35cbc41484d3f7cf (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
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
// -*- c-indentation-style:"stroustrup" c-basic-offset: 4 -*-

/*
  Rosegarden
  A sequencer and musical notation editor.
 
  This program is Copyright 2000-2008
  Guillaume Laurent   <glaurent@telegraph-road.org>,
  Chris Cannam        <cannam@all-day-breakfast.com>,
  Richard Bown        <bownie@bownie.com>
 
  The moral right of the authors to claim authorship of this work
  has been asserted.
 
  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.  See the file
  COPYING included with this distribution for more information.
*/


#include <iostream>
#include "misc/Debug.h"
#include <kapplication.h>
#include <fstream>
#include <string>
#include <cstdio>
#include <algorithm>

#include "Midi.h"
#include "MidiFile.h"
#include "Segment.h"
#include "NotationTypes.h"
#include "BaseProperties.h"
#include "SegmentNotationHelper.h"
#include "SegmentPerformanceHelper.h"
#include "CompositionTimeSliceAdapter.h"
#include "AnalysisTypes.h"
#include "Track.h"
#include "Instrument.h"
#include "Quantizer.h"
#include "Studio.h"
#include "MidiTypes.h"
#include "Profiler.h"

//#define MIDI_DEBUG 1

#if (__GNUC__ < 3)
#include <strstream>
#define stringstream strstream
#else
#include <sstream>
#endif

#include <kapp.h>

namespace Rosegarden
{

using std::string;
using std::ifstream;
using std::stringstream;
using std::cerr;
using std::endl;
using std::ends;
using std::ios;

MidiFile::MidiFile(Studio *studio):
        SoundFile(std::string("unnamed.mid")),
        m_timingDivision(0),
        m_format(MIDI_FILE_NOT_LOADED),
        m_numberOfTracks(0),
        m_containsTimeChanges(false),
        m_trackByteCount(0),
        m_decrementCount(false),
        m_studio(studio)
{}

MidiFile::MidiFile(const std::string &fn,
                   Studio *studio):
        SoundFile(fn),
        m_timingDivision(0),
        m_format(MIDI_FILE_NOT_LOADED),
        m_numberOfTracks(0),
        m_containsTimeChanges(false),
        m_trackByteCount(0),
        m_decrementCount(false),
        m_studio(studio)
{}

// Make sure we clear away the m_midiComposition
//
MidiFile::~MidiFile()
{
    clearMidiComposition();
}


// A couple of convenience functions.   Watch the byte conversions out
// of the STL strings.
//
//
long
MidiFile::midiBytesToLong(const string& bytes)
{
    if (bytes.length() != 4) {
#ifdef MIDI_DEBUG
        std::cerr << "WARNING: Wrong length for long data (" << bytes.length()
        << ", should be 4)" << endl;
#endif

        throw (Exception("Wrong length for long data in MIDI stream"));
    }

    long longRet = ((long)(((MidiByte)bytes[0]) << 24)) |
                   ((long)(((MidiByte)bytes[1]) << 16)) |
                   ((long)(((MidiByte)bytes[2]) << 8)) |
                   ((long)((MidiByte)(bytes[3])));

    std::cerr << "midiBytesToLong(" << int((MidiByte)bytes[0]) << "," << int((MidiByte)bytes[1]) << "," << int((MidiByte)bytes[2]) << "," << int((MidiByte)bytes[3]) << ") -> " << longRet << std::endl;

    return longRet;
}

int
MidiFile::midiBytesToInt(const string& bytes)
{
    if (bytes.length() != 2) {
#ifdef MIDI_DEBUG
        std::cerr << "WARNING: Wrong length for int data (" << bytes.length()
        << ", should be 2)" << endl;
#endif

        throw (Exception("Wrong length for int data in MIDI stream"));
    }

    int intRet = ((int)(((MidiByte)bytes[0]) << 8)) |
                 ((int)(((MidiByte)bytes[1])));
    return (intRet);
}



// Gets a single byte from the MIDI byte stream.  For each track
// section we can read only a specified number of bytes held in
// m_trackByteCount.
//
MidiByte
MidiFile::getMidiByte(ifstream* midiFile)
{
    static int bytesGot = 0; // purely for progress reporting purposes

    if (midiFile->eof()) {
        throw(Exception("End of MIDI file encountered while reading"));
    }

    if (m_decrementCount && m_trackByteCount <= 0) {
        throw(Exception("Attempt to get more bytes than expected on Track"));
    }

    char byte;
    if (midiFile->read(&byte, 1)) {

        --m_trackByteCount;

        // update a progress dialog if we have one
        //
        ++bytesGot;
        if (bytesGot % 2000 == 0) {

            emit setProgress((int)(double(midiFile->tellg()) /
                                   double(m_fileSize) * 20.0));
            kapp->tqprocessEvents(50);
        }

        return (MidiByte)byte;
    }

    throw(Exception("Attempt to read past MIDI file end"));
}


// Gets a specified number of bytes from the MIDI byte stream.  For
// each track section we can read only a specified number of bytes
// held in m_trackByteCount.
//
string
MidiFile::getMidiBytes(ifstream* midiFile, unsigned long numberOfBytes)
{
    string stringRet;
    char fileMidiByte;
    static int bytesGot = 0; // purely for progress reporting purposes

    if (midiFile->eof()) {
#ifdef MIDI_DEBUG
        std::cerr << "MIDI file EOF - got "
        << stringRet.length() << " bytes out of "
        << numberOfBytes << endl;
#endif

        throw(Exception("End of MIDI file encountered while reading"));

    }

    if (m_decrementCount && (numberOfBytes > (unsigned long)m_trackByteCount)) {
#ifdef MIDI_DEBUG
        std::cerr << "Attempt to get more bytes than allowed on Track ("
        << numberOfBytes
        << " > "
        << m_trackByteCount << endl;
#endif

        //!!! Investigate -- I'm seeing this on new-notation-quantization
        // branch: load glazunov.rg, run Interpret on first segment, export
        // and attempt to import again

        throw(Exception("Attempt to get more bytes than expected on Track"));
    }

    while (stringRet.length() < numberOfBytes &&
            midiFile->read(&fileMidiByte, 1)) {
        stringRet += fileMidiByte;
    }

    // if we've reached the end of file without fulfilling the
    // quota then panic as our parsing has performed incorrectly
    //
    if (stringRet.length() < numberOfBytes) {
        stringRet = "";
#ifdef MIDI_DEBUG

        cerr << "Attempt to read past file end - got "
        << stringRet.length() << " bytes out of "
        << numberOfBytes << endl;
#endif

        throw(Exception("Attempt to read past MIDI file end"));

    }

    // decrement the byte count
    if (m_decrementCount)
        m_trackByteCount -= stringRet.length();

    // update a progress dialog if we have one
    //
    bytesGot += numberOfBytes;
    if (bytesGot % 2000 == 0) {
        emit setProgress((int)(double(midiFile->tellg()) /
                               double(m_fileSize) * 20.0));
        kapp->tqprocessEvents(50);
    }

    return stringRet;
}


// Get a long number of variable length from the MIDI byte stream.
//
//
long
MidiFile::getNumberFromMidiBytes(ifstream* midiFile, int firstByte)
{
    long longRet = 0;
    MidiByte midiByte;

    if (firstByte >= 0) {
        midiByte = (MidiByte)firstByte;
    } else if (midiFile->eof()) {
        return longRet;
    } else {
        midiByte = getMidiByte(midiFile);
    }

    longRet = midiByte;
    if (midiByte & 0x80 ) {
        longRet &= 0x7F;
        do {
            midiByte = getMidiByte(midiFile);
            longRet = (longRet << 7) + (midiByte & 0x7F);
        } while (!midiFile->eof() && (midiByte & 0x80));
    }

    return longRet;
}



// Seeks to the next track in the midi file and sets the number
// of bytes to be read in the counter m_trackByteCount.
//
bool
MidiFile::skipToNextTrack(ifstream *midiFile)
{
    string buffer, buffer2;
    m_trackByteCount = -1;
    m_decrementCount = false;

    while (!midiFile->eof() && (m_decrementCount == false )) {
        buffer = getMidiBytes(midiFile, 4);

#if (__GNUC__ < 3)

        if (buffer.compare(MIDI_TRACK_HEADER, 0, 4) == 0)
#else

        if (buffer.compare(0, 4, MIDI_TRACK_HEADER) == 0)
#endif

        {
            m_trackByteCount = midiBytesToLong(getMidiBytes(midiFile, 4));
            m_decrementCount = true;
        }

    }

    if ( m_trackByteCount == -1 ) // we haven't found a track
        return (false);
    else
        return (true);
}


// Read in a MIDI file.  The parsing process throws string
// exceptions back up here if we run into trouble which we
// can then pass back out to whoever called us using a nice
// bool.
//
//
bool
MidiFile::open()
{
    bool retOK = true;
    m_error = "";

#ifdef MIDI_DEBUG

    std::cerr << "MidiFile::open() : fileName = " << m_fileName.c_str() << endl;
#endif

    // Open the file
    ifstream *midiFile = new ifstream(m_fileName.c_str(), ios::in | ios::binary);

    try {
        if (*midiFile) {

            // Set file size so we can count it off
            //
            midiFile->seekg(0, std::ios::end);
            m_fileSize = midiFile->tellg();
            midiFile->seekg(0, std::ios::beg);

            // Parse the MIDI header first.  The first 14 bytes of the file.
            if (!parseHeader(getMidiBytes(midiFile, 14))) {
                m_format = MIDI_FILE_NOT_LOADED;
                m_error = "Not a MIDI file.";
                return (false);
            }

            m_containsTimeChanges = false;

            TrackId i = 0;

            for (unsigned int j = 0; j < m_numberOfTracks; ++j) {

//#ifdef MIDI_DEBUG
                std::cerr << "Parsing Track " << j << endl;
//#endif

                if (!skipToNextTrack(midiFile)) {
#ifdef MIDI_DEBUG
                    cerr << "Couldn't find Track " << j << endl;
#endif

                    m_error = "File corrupted or in non-standard format?";
                    m_format = MIDI_FILE_NOT_LOADED;
                    return (false);
                }

#ifdef MIDI_DEBUG
                std::cerr << "Track has " << m_trackByteCount << " bytes" << std::endl;
#endif

                // Run through the events taking them into our internal
                // representation.
                if (!parseTrack(midiFile, i)) {
//#ifdef MIDI_DEBUG
                    std::cerr << "Track " << j << " parsing failed" << endl;
//#endif

                    m_error = "File corrupted or in non-standard format?";
                    m_format = MIDI_FILE_NOT_LOADED;
                    return (false);
                }

                ++i; // j is the source track number, i the destination
            }

            m_numberOfTracks = i;
        } else {
            m_error = "File not found or not readable.";
            m_format = MIDI_FILE_NOT_LOADED;
            return (false);
        }

        // Close the file now
        midiFile->close();
    } catch (Exception e) {
#ifdef MIDI_DEBUG
        std::cerr << "MidiFile::open() - caught exception - "
        << e.getMessage() << endl;
#endif

        m_error = e.getMessage();
        retOK = false;
    }

    return (retOK);
}

// Parse and ensure the MIDI Header is legitimate
//
//
bool
MidiFile::parseHeader(const string &midiHeader)
{
    if (midiHeader.size() < 14) {
#ifdef MIDI_DEBUG
        std::cerr << "MidiFile::parseHeader() - file header undersized" << endl;
#endif

        return (false);
    }

#if (__GNUC__ < 3)
    if (midiHeader.compare(MIDI_FILE_HEADER, 0, 4) != 0)
#else

    if (midiHeader.compare(0, 4, MIDI_FILE_HEADER) != 0)
#endif

    {
#ifdef MIDI_DEBUG
        std::cerr << "MidiFile::parseHeader()"
        << "- file header not found or malformed"
        << endl;
#endif

        return (false);
    }

    if (midiBytesToLong(midiHeader.substr(4, 4)) != 6L) {
#ifdef MIDI_DEBUG
        std::cerr << "MidiFile::parseHeader()"
        << " - header length incorrect"
        << endl;
#endif

        return (false);
    }

    m_format = (MIDIFileFormatType) midiBytesToInt(midiHeader.substr(8, 2));
    m_numberOfTracks = midiBytesToInt(midiHeader.substr(10, 2));
    m_timingDivision = midiBytesToInt(midiHeader.substr(12, 2));

    if ( m_format == MIDI_SETQUENTIAL_TRACK_FILE ) {
#ifdef MIDI_DEBUG
        std::cerr << "MidiFile::parseHeader()"
        << "- can't load sequential track file"
        << endl;
#endif

        return (false);
    }


#ifdef MIDI_DEBUG
    if ( m_timingDivision < 0 ) {
        std::cerr << "MidiFile::parseHeader()"
        << " - file uses SMPTE timing"
        << endl;
    }
#endif

    return (true);
}



// Extract the contents from a MIDI file track and places it into
// our local map of MIDI events.
//
//
bool
MidiFile::parseTrack(ifstream* midiFile, TrackId &lastTrackNum)
{
    MidiByte midiByte, metaEventCode, data1, data2;
    MidiByte eventCode = 0x80;
    std::string metaMessage;
    unsigned int messageLength;
    unsigned long deltaTime;
    unsigned long accumulatedTime = 0;

    // The trackNum passed in to this method is the default track for
    // all events provided they're all on the same channel.  If we find
    // events on more than one channel, we increment trackNum and record
    // the mapping from channel to trackNum in this channelTrackMap.
    // We then return the new trackNum by reference so the calling
    // method knows we've got more tracks than expected.

    // This would be a vector<TrackId> but TrackId is unsigned
    // and we need -1 to indicate "not yet used"
    std::vector<int> channelTrackMap(16, -1);

    // This is used to store the last absolute time found on each track,
    // allowing us to modify delta-times correctly when separating events
    // out from one to multiple tracks
    //
    std::map<int, unsigned long> trackTimeMap;

    // Meta-events don't have a channel, so we place them in a fixed
    // track number instead
    TrackId metaTrack = lastTrackNum;

    // Remember the last non-meta status byte (-1 if we haven't seen one)
    int runningtqStatus = -1;

    bool firstTrack = true;

    std::cerr << "Parse track: last track number is " << lastTrackNum << std::endl;

    while (!midiFile->eof() && ( m_trackByteCount > 0 ) ) {
        if (eventCode < 0x80) {
#ifdef MIDI_DEBUG
            cerr << "WARNING: Invalid event code " << eventCode
            << " in MIDI file" << endl;
#endif

            throw (Exception("Invalid event code found"));
        }

        deltaTime = getNumberFromMidiBytes(midiFile);

#ifdef MIDI_DEBUG
        cerr << "read delta time " << deltaTime << endl;
#endif

        // Get a single byte
        midiByte = getMidiByte(midiFile);

        if (!(midiByte & MIDI_STATUS_BYTE_MASK)) {
            if (runningtqStatus < 0) {
                throw (Exception("Running status used for first event in track"));
            }

            eventCode = (MidiByte)runningtqStatus;
            data1 = midiByte;

#ifdef MIDI_DEBUG
            std::cerr << "using running status (byte " << int(midiByte) << " found)" << std::endl;
#endif

        } else {
#ifdef MIDI_DEBUG
            std::cerr << "have new event code " << int(midiByte) << std::endl;
#endif

            eventCode = midiByte;
            data1 = getMidiByte(midiFile);
        }

        if (eventCode == MIDI_FILE_META_EVENT) // meta events
        {
            //            metaEventCode = getMidiByte(midiFile);
            metaEventCode = data1;
            messageLength = getNumberFromMidiBytes(midiFile);

#ifdef MIDI_DEBUG

            std::cerr << "Meta event of type " << int(metaEventCode) << " and " << messageLength << " bytes found" << std::endl;
#endif

            metaMessage = getMidiBytes(midiFile, messageLength);

            if (metaEventCode == MIDI_TIME_SIGNATURE ||
                    metaEventCode == MIDI_SET_TEMPO)
            {
                m_containsTimeChanges = true;
            }

            long gap = accumulatedTime - trackTimeMap[metaTrack];
            accumulatedTime += deltaTime;
            deltaTime += gap;
            trackTimeMap[metaTrack] = accumulatedTime;

            MidiEvent *e = new MidiEvent(deltaTime,
                                         MIDI_FILE_META_EVENT,
                                         metaEventCode,
                                         metaMessage);

            m_midiComposition[metaTrack].push_back(e);

        } else // the rest
        {
            runningtqStatus = eventCode;

            MidiEvent *midiEvent;

            int channel = (eventCode & MIDI_CHANNEL_NUM_MASK);
            if (channelTrackMap[channel] == -1) {
                if (!firstTrack) {
                    ++lastTrackNum;
		} else {
                    firstTrack = false;
		}
		std::cerr << "MidiFile: new channel map entry: channel " << channel << " -> track " << lastTrackNum << std::endl;
                channelTrackMap[channel] = lastTrackNum;
		m_trackChannelMap[lastTrackNum] = channel;
            }

            TrackId trackNum = channelTrackMap[channel];

	    {
		static int prevTrackNum = -1, prevChannel = -1;
		if (prevTrackNum != (int) trackNum ||
		    prevChannel != (int) channel) {
		    std::cerr << "MidiFile: track number for channel " << channel << " is " << trackNum << std::endl;
		    prevTrackNum = trackNum;
		    prevChannel = channel;
		}
	    }

            // accumulatedTime is abs time of last event on any track;
            // trackTimeMap[trackNum] is that of last event on this track

            long gap = accumulatedTime - trackTimeMap[trackNum];
            accumulatedTime += deltaTime;
            deltaTime += gap;
            trackTimeMap[trackNum] = accumulatedTime;

            switch (eventCode & MIDI_MESSAGE_TYPE_MASK) {
            case MIDI_NOTE_ON:
            case MIDI_NOTE_OFF:
            case MIDI_POLY_AFTERTOUCH:
            case MIDI_CTRL_CHANGE:
                data2 = getMidiByte(midiFile);

                // create and store our event
                midiEvent = new MidiEvent(deltaTime, eventCode, data1, data2);

                /*
                std::cerr << "MIDI event for channel " << channel << " (track "
                << trackNum << ")" << std::endl;
                midiEvent->print();
                          */


                m_midiComposition[trackNum].push_back(midiEvent);
                break;

            case MIDI_PITCH_BEND:
                data2 = getMidiByte(midiFile);

                // create and store our event
                midiEvent = new MidiEvent(deltaTime, eventCode, data1, data2);
                m_midiComposition[trackNum].push_back(midiEvent);
                break;

            case MIDI_PROG_CHANGE:
            case MIDI_CHNL_AFTERTOUCH:
                // create and store our event
		std::cerr << "Program change or channel aftertouch: time " << deltaTime << ", code " << (int)eventCode << ", data " << (int) data1  << " going to track " << trackNum << std::endl;
                midiEvent = new MidiEvent(deltaTime, eventCode, data1);
                m_midiComposition[trackNum].push_back(midiEvent);
                break;

            case MIDI_SYSTEM_EXCLUSIVE:
                messageLength = getNumberFromMidiBytes(midiFile, data1);

#ifdef MIDI_DEBUG

                std::cerr << "SysEx of " << messageLength << " bytes found" << std::endl;
#endif

                metaMessage = getMidiBytes(midiFile, messageLength);

                if (MidiByte(metaMessage[metaMessage.length() - 1]) !=
                        MIDI_END_OF_EXCLUSIVE) {
#ifdef MIDI_DEBUG
                    std::cerr << "MidiFile::parseTrack() - "
                    << "malformed or unsupported SysEx type"
                    << std::endl;
#endif

                    continue;
                }

                // chop off the EOX
                // length fixed by Pedro Lopez-Cabanillas (20030523)
                //
                metaMessage = metaMessage.substr(0, metaMessage.length() - 1);

                midiEvent = new MidiEvent(deltaTime,
                                          MIDI_SYSTEM_EXCLUSIVE,
                                          metaMessage);
                m_midiComposition[trackNum].push_back(midiEvent);
                break;

            case MIDI_END_OF_EXCLUSIVE:
#ifdef MIDI_DEBUG

                std::cerr << "MidiFile::parseTrack() - "
                << "Found a stray MIDI_END_OF_EXCLUSIVE" << std::endl;
#endif

                break;

            default:
#ifdef MIDI_DEBUG

                std::cerr << "MidiFile::parseTrack()"
                << " - Unsupported MIDI Event Code:  "
                << (int)eventCode << endl;
#endif

                break;
            }
        }
    }

    return (true);
}

// borrowed from ALSA pcm_timer.c
//
static unsigned long gcd(unsigned long a, unsigned long b)
{
    unsigned long r;
    if (a < b) {
        r = a;
        a = b;
        b = r;
    }
    while ((r = a % b) != 0) {
        a = b;
        b = r;
    }
    return b;
}

// If we wanted to abstract the MidiFile class to make it more useful to
// other applications (and formats) we'd make this method and its twin
// pure virtual.
//
bool
MidiFile::convertToRosegarden(Composition &composition, ConversionType type)
{
    Profiler profiler("MidiFile::convertToRosegarden");

    MidiTrack::iterator midiEvent;
    Segment *rosegardenSegment;
    Segment *conductorSegment = 0;
    Event *rosegardenEvent;
    string trackName;

    // Time conversions
    //
    timeT rosegardenTime = 0;
    timeT rosegardenDuration = 0;
    timeT maxTime = 0;

    // To create rests
    //
    timeT endOfLastNote;

    // Event specific vars
    //
    int numerator = 4;
    int denominator = 4;
    timeT segmentTime;

    // keys
    int accidentals;
    bool isMinor;
    bool isSharp;

    if (type == CONVERT_REPLACE)
        composition.clear();

    timeT origin = 0;
    if (type == CONVERT_APPEND && composition.getDuration() > 0) {
        origin = composition.getBarEndForTime(composition.getDuration());
    }

    TrackId compTrack = 0;
    for (Composition::iterator ci = composition.begin();
            ci != composition.end(); ++ci) {
        if ((*ci)->getTrack() >= compTrack)
            compTrack = (*ci)->getTrack() + 1;
    }

    Track *track = 0;

    // precalculate the timing factor
    //
    // [cc] -- attempt to avoid floating-point rounding errors
    timeT crotchetTime = Note(Note::Crotchet).getDuration();
    int divisor = m_timingDivision ? m_timingDivision : 96;

    unsigned long multiplier = crotchetTime;
    int g = (int)gcd(crotchetTime, divisor);
    multiplier /= g;
    divisor /= g;

    timeT maxRawTime = LONG_MAX;
    if (multiplier > divisor)
        maxRawTime = (maxRawTime / multiplier) * divisor;

    bool haveTimeSignatures = false;
    InstrumentId compInstrument = MidiInstrumentBase;

    // Clear down the assigned Instruments we already have
    //
    if (type == CONVERT_REPLACE) {
	m_studio->unassignAllInstruments();
    }

    std::vector<Segment *> addedSegments;

#ifdef MIDI_DEBUG

    std::cerr << "NUMBER OF TRACKS = " << m_numberOfTracks << endl;
    std::cerr << "MIDI COMP SIZE = " << m_midiComposition.size() << endl;
#endif

    for (TrackId i = 0; i < m_numberOfTracks; i++ ) {
        segmentTime = 0;
        trackName = string("Imported MIDI");

        // progress - 20% total in file import itself and then 80%
        // split over these tracks
        emit setProgress(20 +
                         (int)((80.0 * double(i) / double(m_numberOfTracks))));
        kapp->tqprocessEvents(50);

        // Convert the deltaTime to an absolute time since
        // the start of the segment.  The addTime method
        // returns the sum of the current Midi Event delta
        // time plus the argument.
        //
        for (midiEvent = m_midiComposition[i].begin();
                midiEvent != m_midiComposition[i].end();
                ++midiEvent) {
            segmentTime = (*midiEvent)->addTime(segmentTime);
        }

        // Consolidate NOTE ON and NOTE OFF events into a NOTE ON with
        // a duration.
        //
	consolidateNoteOffEvents(i);

	if (m_trackChannelMap.find(i) != m_trackChannelMap.end()) {
	    compInstrument = MidiInstrumentBase + m_trackChannelMap[i];
	} else {
	    compInstrument = MidiInstrumentBase;
	}

        rosegardenSegment = new Segment;
        rosegardenSegment->setTrack(compTrack);
        rosegardenSegment->setStartTime(0);

        track = new Track(compTrack,         // id
                          compInstrument,    // instrument
                          compTrack,         // position
                          trackName,         // name
                          false);           // muted

	std::cerr << "New Rosegarden track: id = " << compTrack << ", instrument = " << compInstrument << ", name = " << trackName << std::endl;

        // rest creation token needs to be reset here
        //
        endOfLastNote = 0;

        int msb = -1, lsb = -1; // for bank selects
        Instrument *instrument = 0;

        for (midiEvent = m_midiComposition[i].begin();
	     midiEvent != m_midiComposition[i].end();
	     midiEvent++) {
            rosegardenEvent = 0;

            // [cc] -- avoid floating-point where possible

            timeT rawTime = (*midiEvent)->getTime();

            if (rawTime < maxRawTime) {
                rosegardenTime = origin +
                                 timeT((rawTime * multiplier) / divisor);
            } else {
                rosegardenTime = origin +
                                 timeT((double(rawTime) * multiplier) / double(divisor) + 0.01);
            }

            rosegardenDuration =
                timeT(((*midiEvent)->getDuration() * multiplier) / divisor);

#ifdef MIDI_DEBUG

            std::cerr << "MIDI file import: origin " << origin
            << ", event time " << rosegardenTime
            << ", duration " << rosegardenDuration
            << ", event type " << (int)(*midiEvent)->getMessageType()
            << ", previous max time " << maxTime
            << ", potential max time " << (rosegardenTime + rosegardenDuration)
            << ", ev raw time " << (*midiEvent)->getTime()
            << ", crotchet " << crotchetTime
            << ", multiplier " << multiplier
            << ", divisor " << divisor
            << std::endl;
#endif

            if (rosegardenTime + rosegardenDuration > maxTime) {
                maxTime = rosegardenTime + rosegardenDuration;
            }

            //	    timeT fillFromTime = rosegardenTime;
            if (rosegardenSegment->empty()) {
                //		fillFromTime = composition.getBarStartForTime(rosegardenTime);
                endOfLastNote = composition.getBarStartForTime(rosegardenTime);
            }

            if ((*midiEvent)->isMeta()) {

                switch ((*midiEvent)->getMetaEventCode()) {

                case MIDI_TEXT_EVENT: {
                        std::string text = (*midiEvent)->getMetaMessage();
                        rosegardenEvent =
                            Text(text).getAsEvent(rosegardenTime);
                    }
                    break;

                case MIDI_LYRIC: {
                        std::string text = (*midiEvent)->getMetaMessage();
//		    std::cerr << "lyric event: text=\""
//			      << text << "\", time=" << rosegardenTime << std::endl;
                        rosegardenEvent =
                            Text(text, Text::Lyric).
                            getAsEvent(rosegardenTime);
                    }
                    break;

                case MIDI_TEXT_MARKER: {
                        std::string text = (*midiEvent)->getMetaMessage();
                        composition.addMarker(new Marker
                                              (rosegardenTime, text, ""));
                    }
                    break;

                case MIDI_COPYRIGHT_NOTICE:
                    if (type == CONVERT_REPLACE) {
                        composition.setCopyrightNote((*midiEvent)->
                                                     getMetaMessage());
                    }
                    break;

                case MIDI_TRACK_NAME:
                    track->setLabel((*midiEvent)->getMetaMessage());
                    break;

		case MIDI_INSTRUMENT_NAME:
		    rosegardenSegment->setLabel((*midiEvent)->getMetaMessage());
		    break;

                case MIDI_END_OF_TRACK: {
                        timeT trackEndTime = rosegardenTime;
                        if (trackEndTime <= 0) {
                            trackEndTime = crotchetTime * 4 * numerator / denominator;
                        }
                        if (endOfLastNote < trackEndTime) {
                            //If there's nothing in the segment yet, then we
                            //shouldn't fill with rests because we don't want
                            //to cause the otherwise empty segment to be created
                            if (rosegardenSegment->size() > 0) {
                                rosegardenSegment->fillWithRests(trackEndTime);
                            }
                        }
                    }
                    break;

                case MIDI_SET_TEMPO: {
                        MidiByte m0 = (*midiEvent)->getMetaMessage()[0];
                        MidiByte m1 = (*midiEvent)->getMetaMessage()[1];
                        MidiByte m2 = (*midiEvent)->getMetaMessage()[2];

                        long tempo = (((m0 << 8) + m1) << 8) + m2;

                        if (tempo != 0) {
                            double qpm = 60000000.0 / double(tempo);
                            tempoT rgt(Composition::getTempoForQpm(qpm));
                            std::cout << "MidiFile: converted MIDI tempo " << tempo << " to Rosegarden tempo " << rgt << std::endl;
                            composition.addTempoAtTime(rosegardenTime, rgt);
                        }
                    }
                    break;

                case MIDI_TIME_SIGNATURE:
                    numerator = (int) (*midiEvent)->getMetaMessage()[0];
                    denominator = 1 << ((int)(*midiEvent)->getMetaMessage()[1]);

                    // NB. a MIDI time signature also has
                    // metamessage[2] and [3], containing some timing data

                    if (numerator == 0)
                        numerator = 4;
                    if (denominator == 0)
                        denominator = 4;

                    composition.addTimeSignature
                    (rosegardenTime,
                     TimeSignature(numerator, denominator));
                    haveTimeSignatures = true;
                    break;

                case MIDI_KEY_SIGNATURE:
                    // get the details
                    accidentals = (int) (*midiEvent)->getMetaMessage()[0];
                    isMinor = (int) (*midiEvent)->getMetaMessage()[1];
                    isSharp = accidentals < 0 ? false : true;
                    accidentals = accidentals < 0 ? -accidentals : accidentals;
                    // create the key event
                    //
                    try {
                        rosegardenEvent = Rosegarden::Key
                                          (accidentals, isSharp, isMinor).
                                          getAsEvent(rosegardenTime);
                    }
                    catch (...) {
#ifdef MIDI_DEBUG
                        std::cerr << "MidiFile::convertToRosegarden - "
                        << " badly formed key signature"
                        << std::endl;
#endif

                        break;
                    }
                    break;

                case MIDI_SEQUENCE_NUMBER:
                case MIDI_CHANNEL_PREFIX_OR_PORT:
                case MIDI_CUE_POINT:
                case MIDI_CHANNEL_PREFIX:
                case MIDI_SEQUENCER_SPECIFIC:
                case MIDI_SMPTE_OFFSET:
                default:
#ifdef MIDI_DEBUG

                    std::cerr << "MidiFile::convertToRosegarden - "
                    << "unsupported META event code "
                    << (int)((*midiEvent)->getMetaEventCode()) << endl;
#endif

                    break;
                }

            } else
                switch ((*midiEvent)->getMessageType()) {
                case MIDI_NOTE_ON:

                    // A zero velocity here is a virtual "NOTE OFF"
                    // so we ignore this event
                    //
                    if ((*midiEvent)->getVelocity() == 0)
                        break;

                    endOfLastNote = rosegardenTime + rosegardenDuration;

                    //std::cerr << "MidiFile::convertToRosegarden: note at " << rosegardenTime << ", midi time " << (*midiEvent)->getTime() << std::endl;

                    // create and populate event
                    rosegardenEvent = new Event(Note::EventType,
                                                rosegardenTime,
                                                rosegardenDuration);
                    rosegardenEvent->set
			<Int>(BaseProperties::PITCH,
			      (*midiEvent)->getPitch());
                    rosegardenEvent->set
			<Int>(BaseProperties::VELOCITY,
			      (*midiEvent)->getVelocity());
                    break;

                    // We ignore any NOTE OFFs here as we've already
                    // converted NOTE ONs to have duration
                    //
                case MIDI_NOTE_OFF:
                    continue;
                    break;

                case MIDI_PROG_CHANGE:
                    // Attempt to turn the prog change we've found into an
                    // Instrument.  Send the program number and whether or
                    // not we're on the percussion channel.
                    //
                    // Note that we make no attempt to do the right
                    // thing with program changes during a track -- we
                    // just save them as events.  Only the first is
                    // used to select the instrument.  If it's at time
                    // zero, it's not saved as an event.
                    //
//		    std::cerr << "Program change found" << std::endl;

                    if (!instrument) {

			bool percussion = (*midiEvent)->getChannelNumber() ==
			    MIDI_PERCUSSION_CHANNEL;
			int program = (*midiEvent)->getData1();

			if (type == CONVERT_REPLACE) {

			    instrument = m_studio->getInstrumentById(compInstrument);
			    if (instrument) {
				instrument->setPercussion(percussion);
				instrument->setSendProgramChange(true);
				instrument->setProgramChange(program);
				instrument->setSendBankSelect(msb >= 0 || lsb >= 0);
				if (instrument->sendsBankSelect()) {
				    instrument->setMSB(msb >= 0 ? msb : 0);
				    instrument->setLSB(lsb >= 0 ? lsb : 0);
				}
			    }
			} else { // not CONVERT_REPLACE
			    instrument =
				m_studio->assignMidiProgramToInstrument
				(program, msb, lsb, percussion);
			}
		    }

		    // assign it here
		    if (instrument) {
			track->setInstrument(instrument->getId());
			// We used to set the segment name from the instrument
			// here, but now we do them all at the end only if the
			// segment has no other name set (e.g. from instrument
			// meta event)
			if ((*midiEvent)->getTime() == 0) break; // no insert
		    }

                    // did we have a bank select? if so, insert that too

                    if (msb >= 0) {
                        rosegardenSegment->insert
                        (Controller(MIDI_CONTROLLER_BANK_MSB, msb).
                         getAsEvent(rosegardenTime));
                    }
                    if (lsb >= 0) {
                        rosegardenSegment->insert
                        (Controller(MIDI_CONTROLLER_BANK_LSB, msb).
                         getAsEvent(rosegardenTime));
                    }

                    rosegardenEvent =
                        ProgramChange((*midiEvent)->getData1()).
                        getAsEvent(rosegardenTime);
                    break;

                case MIDI_CTRL_CHANGE:

                    // If it's a bank select, interpret it (or remember
                    // for later insertion) instead of just inserting it
                    // as a Rosegarden event

                    if ((*midiEvent)->getData1() == MIDI_CONTROLLER_BANK_MSB) {
                        msb = (*midiEvent)->getData2();
                        break;
                    }

                    if ((*midiEvent)->getData1() == MIDI_CONTROLLER_BANK_LSB) {
                        lsb = (*midiEvent)->getData2();
                        break;
                    }

                    // If it's something we can use as an instrument
                    // parameter, and it's at time zero, and we already
                    // have an instrument, then apply it to the instrument
                    // instead of inserting

                    if (instrument && (*midiEvent)->getTime() == 0) {
                        if ((*midiEvent)->getData1() == MIDI_CONTROLLER_VOLUME) {
                            instrument->setVolume((*midiEvent)->getData2());
                            break;
                        }
                        if ((*midiEvent)->getData1() == MIDI_CONTROLLER_PAN) {
                            instrument->setPan((*midiEvent)->getData2());
                            break;
                        }
                        if ((*midiEvent)->getData1() == MIDI_CONTROLLER_ATTACK) {
                            instrument->setControllerValue(MIDI_CONTROLLER_ATTACK, (*midiEvent)->getData2());
                            break;
                        }
                        if ((*midiEvent)->getData1() == MIDI_CONTROLLER_RELEASE) {
                            instrument->setControllerValue(MIDI_CONTROLLER_RELEASE, (*midiEvent)->getData2());
                            break;
                        }
                        if ((*midiEvent)->getData1() == MIDI_CONTROLLER_FILTER) {
                            instrument->setControllerValue(MIDI_CONTROLLER_FILTER, (*midiEvent)->getData2());
                            break;
                        }
                        if ((*midiEvent)->getData1() == MIDI_CONTROLLER_RESONANCE) {
                            instrument->setControllerValue(MIDI_CONTROLLER_RESONANCE, (*midiEvent)->getData2());
                            break;
                        }
                        if ((*midiEvent)->getData1() == MIDI_CONTROLLER_CHORUS) {
                            instrument->setControllerValue(MIDI_CONTROLLER_CHORUS, (*midiEvent)->getData2());
                            break;
                        }
                        if ((*midiEvent)->getData1() == MIDI_CONTROLLER_REVERB) {
                            instrument->setControllerValue(MIDI_CONTROLLER_REVERB, (*midiEvent)->getData2());
                            break;
                        }
                    }

                    rosegardenEvent =
                        Controller((*midiEvent)->getData1(),
                                   (*midiEvent)->getData2()).
                        getAsEvent(rosegardenTime);
                    break;

                case MIDI_PITCH_BEND:
                    rosegardenEvent =
                        PitchBend((*midiEvent)->getData2(),
                                  (*midiEvent)->getData1()).
                        getAsEvent(rosegardenTime);
                    break;

                case MIDI_SYSTEM_EXCLUSIVE:
                    rosegardenEvent =
                        SystemExclusive((*midiEvent)->getMetaMessage()).
                        getAsEvent(rosegardenTime);
                    break;

                case MIDI_POLY_AFTERTOUCH:
                    rosegardenEvent =
                        KeyPressure((*midiEvent)->getData1(),
                                    (*midiEvent)->getData2()).
                        getAsEvent(rosegardenTime);
                    break;

                case MIDI_CHNL_AFTERTOUCH:
                    rosegardenEvent =
                        ChannelPressure((*midiEvent)->getData1()).
                        getAsEvent(rosegardenTime);
                    break;

                default:
#ifdef MIDI_DEBUG

                    std::cerr << "MidiFile::convertToRosegarden - "
                    << "Unsupported event code = "
                    << (int)(*midiEvent)->getMessageType() << std::endl;
#endif

                    break;
                }

            if (rosegardenEvent) {
                //		if (fillFromTime < rosegardenTime) {
                //		    rosegardenSegment->fillWithRests(fillFromTime, rosegardenTime);
                //		}
                if (endOfLastNote < rosegardenTime) {
                    rosegardenSegment->fillWithRests(endOfLastNote, rosegardenTime);
                }
                rosegardenSegment->insert(rosegardenEvent);
            }
        }

        if (rosegardenSegment->size() > 0) {

            // if all we have is key signatures and rests, take this
            // to be a conductor segment and don't insert it
            //
            bool keySigsOnly = true;
            bool haveKeySig = false;
            for (Segment::iterator i = rosegardenSegment->begin();
                    i != rosegardenSegment->end(); ++i) {
                if (!(*i)->isa(Rosegarden::Key::EventType) &&
                        !(*i)->isa(Note::EventRestType)) {
                    keySigsOnly = false;
                    break;
                } else if ((*i)->isa(Rosegarden::Key::EventType)) {
                    haveKeySig = true;
                }
            }

            if (keySigsOnly) {
                conductorSegment = rosegardenSegment;
                continue;
            } else if (!haveKeySig && conductorSegment) {
                // copy across any key sigs from the conductor segment

                timeT segmentStartTime = rosegardenSegment->getStartTime();
                timeT earliestEventEndTime = segmentStartTime;

                for (Segment::iterator i = conductorSegment->begin();
                        i != conductorSegment->end(); ++i) {
                    if ((*i)->getAbsoluteTime() + (*i)->getDuration() <
                            earliestEventEndTime) {
                        earliestEventEndTime =
                            (*i)->getAbsoluteTime() + (*i)->getDuration();
                    }
                    rosegardenSegment->insert(new Event(**i));
                }

                if (earliestEventEndTime < segmentStartTime) {
                    rosegardenSegment->fillWithRests(earliestEventEndTime,
                                                     segmentStartTime);
                }
            }

#ifdef MIDI_DEBUG
            std::cerr << "MIDI import: adding segment with start time " << rosegardenSegment->getStartTime() << " and end time " << rosegardenSegment->getEndTime() << std::endl;
	    if (rosegardenSegment->getEndTime() == 2880) {
		std::cerr << "events:" << std::endl;
		for (Segment::iterator i = rosegardenSegment->begin();
		     i != rosegardenSegment->end(); ++i) {
		    std::cerr << "type = " << (*i)->getType() << std::endl;
		    std::cerr << "time = " << (*i)->getAbsoluteTime() << std::endl;
		    std::cerr << "duration = " << (*i)->getDuration() << std::endl;
		}
	    }
#endif

            // add the Segment to the Composition and increment the
            // Rosegarden segment number
            //
            composition.addTrack(track);
            composition.addSegment(rosegardenSegment);
	    addedSegments.push_back(rosegardenSegment);
            compTrack++;

        } else {
            delete rosegardenSegment;
            rosegardenSegment = 0;
            delete track;
            track = 0;
        }
    }

    if (type == CONVERT_REPLACE || maxTime > composition.getEndMarker()) {
        composition.setEndMarker(composition.getBarEndForTime(maxTime));
    }

    for (std::vector<Segment *>::iterator i = addedSegments.begin();
	 i != addedSegments.end(); ++i) {
	Segment *s = *i;
	if (s) {
	    timeT duration = s->getEndMarkerTime() - s->getStartTime();
/*
	    std::cerr << "duration = " << duration << " (start "
		      << s->getStartTime() << ", end " << s->getEndTime()
		      << ", marker " << s->getEndMarkerTime() << ")" << std::endl;
*/
	    if (duration == 0) {
		s->setEndMarkerTime(s->getStartTime() +
				    Note(Note::Crotchet).getDuration());
	    }
	    Instrument *instr = m_studio->getInstrumentFor(s);
	    if (instr) {
		if (s->getLabel() == "") {
		    s->setLabel(m_studio->getSegmentName(instr->getId()));
		}
	    }
	}
    }

    return true;
}

// Takes a Composition and turns it into internal MIDI representation
// that can then be written out to file.
//
// For the moment we should watch to make sure that multiple Segment
// (parts) don't equate to multiple segments in the MIDI Composition.
//
// This is a two pass operation - firstly convert the RG Composition
// into MIDI events and insert anything extra we need (i.e. NOTE OFFs)
// with absolute times before then processing all timings into delta
// times.
//
//
void
MidiFile::convertToMidi(Composition &comp)
{
    MidiEvent *midiEvent;
    int conductorTrack = 0;

    timeT midiEventAbsoluteTime;
    MidiByte midiVelocity;
    MidiByte midiChannel = 0;

    // [cc] int rather than floating point
    //
    m_timingDivision = 480; //!!! make this configurable
    timeT crotchetDuration = Note(Note::Crotchet).getDuration();

    // Export as this format only
    //
    m_format = MIDI_SIMULTANEOUS_TRACK_FILE;

    // Clear out the MidiComposition internal store
    //
    clearMidiComposition();

    // Insert the Rosegarden Signature Track here and any relevant
    // file META information - this will get written out just like
    // any other MIDI track.
    //
    midiEvent = new MidiEvent(0, MIDI_FILE_META_EVENT, MIDI_COPYRIGHT_NOTICE,
                              comp.getCopyrightNote());

    m_midiComposition[conductorTrack].push_back(midiEvent);

    midiEvent = new MidiEvent(0, MIDI_FILE_META_EVENT, MIDI_CUE_POINT,
                              "Created by Rosegarden");

    m_midiComposition[conductorTrack].push_back(midiEvent);

    midiEvent = new MidiEvent(0, MIDI_FILE_META_EVENT, MIDI_CUE_POINT,
                              "http://www.rosegardenmusic.com/");

    m_midiComposition[conductorTrack].push_back(midiEvent);

    // Insert tempo events
    //
    for (int i = 0; i < comp.getTempoChangeCount(); i++) // i=0 should be comp.getStart-something
    {
        std::pair<timeT, tempoT> tempo = comp.getTempoChange(i);

        midiEventAbsoluteTime = tempo.first * m_timingDivision
                                / crotchetDuration;

        double qpm = Composition::getTempoQpm(tempo.second);
        long tempoValue = long(60000000.0 / qpm + 0.01);

        string tempoString;
        tempoString += (MidiByte) ( tempoValue >> 16 & 0xFF );
        tempoString += (MidiByte) ( tempoValue >> 8 & 0xFF );
        tempoString += (MidiByte) ( tempoValue & 0xFF );

        midiEvent = new MidiEvent(midiEventAbsoluteTime,
                                  MIDI_FILE_META_EVENT,
                                  MIDI_SET_TEMPO,
                                  tempoString);

        m_midiComposition[conductorTrack].push_back(midiEvent);
    }

    // Insert time signatures (don't worry that the times might be out
    // of order with those of the tempo events -- we sort the track later)
    //
    for (int i = 0; i < comp.getTimeSignatureCount(); i++) {
        std::pair<timeT, TimeSignature> timeSig =
            comp.getTimeSignatureChange(i);

        midiEventAbsoluteTime = timeSig.first * m_timingDivision
                                / crotchetDuration;

        string timeSigString;
        timeSigString += (MidiByte) (timeSig.second.getNumerator());
        int denominator = timeSig.second.getDenominator();
        int denPowerOf2 = 0;

        // Work out how many powers of two are in the denominator
        //
        while (denominator >>= 1)
            denPowerOf2++;

        timeSigString += (MidiByte) denPowerOf2;

        // The third byte is the number of MIDI clocks per beat.
        // There are 24 clocks per quarter-note (the MIDI clock
        // is tempo-independent and is not related to the timebase).
        //
        int cpb = 24 * timeSig.second.getBeatDuration() / crotchetDuration;
        timeSigString += (MidiByte) cpb;

        // And the fourth byte is always 8, for us (it expresses
        // the number of notated 32nd-notes in a MIDI quarter-note,
        // for applications that may want to notate and perform
        // in different units)
        //
        timeSigString += (MidiByte) 8;

        midiEvent = new MidiEvent(midiEventAbsoluteTime,
                                  MIDI_FILE_META_EVENT,
                                  MIDI_TIME_SIGNATURE,
                                  timeSigString);

        m_midiComposition[conductorTrack].push_back(midiEvent);
    }

    // Insert markers
    // fix for bug#
    Composition::markercontainer marks = comp.getMarkers();

    for (unsigned int i = 0; i < marks.size(); i++) {
        midiEventAbsoluteTime = marks[i]->getTime() * m_timingDivision
                                / crotchetDuration;

        midiEvent = new MidiEvent( midiEventAbsoluteTime,
                                   MIDI_FILE_META_EVENT,
                                   MIDI_TEXT_MARKER,
                                   marks[i]->getName() );

        m_midiComposition[conductorTrack].push_back(midiEvent);
    }

    m_numberOfTracks = 1;
    std::map<int, int> trackPosMap; // RG track pos -> MIDI track no

    // In pass one just insert all events including new NOTE OFFs at the right
    // absolute times.
    //
    for (Composition::const_iterator segment = comp.begin();
            segment != comp.end(); ++segment) {

        // We use this later to get NOTE durations
        //
        SegmentPerformanceHelper helper(**segment);

        Track *track = comp.getTrackById((*segment)->getTrack());

        if (track->isMuted()) continue;

	// Fix #1602023, map Rosegarden tracks to MIDI tracks, instead of
	// putting each segment out on a new track

	int trackPosition = track->getPosition();
	bool firstSegmentThisTrack = false;

	if (trackPosMap.find(trackPosition) == trackPosMap.end()) {
	    firstSegmentThisTrack = true;
	    trackPosMap[trackPosition] = m_numberOfTracks++;
	}

	int trackNumber = trackPosMap[trackPosition];

	MidiTrack &mtrack = m_midiComposition[trackNumber];

	midiEvent = new MidiEvent(0,
				  MIDI_FILE_META_EVENT,
				  MIDI_TRACK_NAME,
				  track->getLabel());

	mtrack.push_back(midiEvent);

        // Get the Instrument
        //
        Instrument *instr =
            m_studio->getInstrumentById(track->getInstrument());

	if (firstSegmentThisTrack) {

	    MidiByte program = 0;
	    midiChannel = 0;

	    bool useBank = false;
	    MidiByte lsb = 0;
	    MidiByte msb = 0;

	    if (instr) {
		midiChannel = instr->getMidiChannel();
		program = instr->getProgramChange();
		if (instr->sendsBankSelect()) {
		    lsb = instr->getLSB();
		    msb = instr->getMSB();
		    useBank = true;
		}
	    }
	    
	    if (useBank) {
		
		// insert a bank select
		
		if (msb != 0) {
		    midiEvent = new MidiEvent(0,
					      MIDI_CTRL_CHANGE | midiChannel,
					      MIDI_CONTROLLER_BANK_MSB,
					      msb);
		    mtrack.push_back(midiEvent);
		}

		if (lsb != 0) {
		    midiEvent = new MidiEvent(0,
					      MIDI_CTRL_CHANGE | midiChannel,
					      MIDI_CONTROLLER_BANK_LSB,
					      lsb);
		    mtrack.push_back(midiEvent);
		}
	    }

	    // insert a program change
	    midiEvent = new MidiEvent(0,  // time
				      MIDI_PROG_CHANGE | midiChannel,
				      program);
	    mtrack.push_back(midiEvent);

	    if (instr) {

		// MidiInstrument parameters: volume, pan, attack,
		// release, filter, resonance, chorus, reverb.  Always
		// write these: the Instrument has an additional parameter
		// to record whether they should be sent, but it isn't
		// actually set anywhere so we have to ignore it.

		static int controllers[] = {
		    MIDI_CONTROLLER_ATTACK,
		    MIDI_CONTROLLER_RELEASE,
		    MIDI_CONTROLLER_FILTER,
		    MIDI_CONTROLLER_RESONANCE,
		    MIDI_CONTROLLER_CHORUS,
		    MIDI_CONTROLLER_REVERB
		};

		mtrack.push_back
		    (new MidiEvent(0, MIDI_CTRL_CHANGE | midiChannel,
				   MIDI_CONTROLLER_VOLUME, instr->getVolume()));

		mtrack.push_back
		    (new MidiEvent(0, MIDI_CTRL_CHANGE | midiChannel,
				   MIDI_CONTROLLER_PAN, instr->getPan()));

		for (int i = 0; i < sizeof(controllers)/sizeof(controllers[0]); ++i) {
		    try {
			mtrack.push_back
			    (new MidiEvent
			     (0, MIDI_CTRL_CHANGE | midiChannel, controllers[i],
			      instr->getControllerValue(controllers[i])));
		    } catch (...) {
			/* do nothing */
		    }
		}
	    } // if (instr)
	} // if (firstSegmentThisTrack)

        timeT segmentMidiDuration =
            ((*segment)->getEndMarkerTime() -
             (*segment)->getStartTime()) * m_timingDivision /
            crotchetDuration;

        for (Segment::iterator el = (*segment)->begin();
	     (*segment)->isBeforeEndMarker(el); ++el) {
            midiEventAbsoluteTime =
                (*el)->getAbsoluteTime() + (*segment)->getDelay();

            timeT absoluteTimeLimit = midiEventAbsoluteTime;
            if ((*segment)->isRepeating()) {
                absoluteTimeLimit = ((*segment)->getRepeatEndTime() - 1) +
		    (*segment)->getDelay();
            }

            if ((*segment)->getRealTimeDelay() != RealTime::zeroTime) {
                RealTime evRT = comp.getElapsedRealTime(midiEventAbsoluteTime);
                timeT timeBeforeDelay = midiEventAbsoluteTime;
                midiEventAbsoluteTime = comp.getElapsedTimeForRealTime
		    (evRT + (*segment)->getRealTimeDelay());
                absoluteTimeLimit += (midiEventAbsoluteTime - timeBeforeDelay);
            }

            midiEventAbsoluteTime =
                midiEventAbsoluteTime * m_timingDivision / crotchetDuration;
            absoluteTimeLimit =
                absoluteTimeLimit * m_timingDivision / crotchetDuration;

            while (midiEventAbsoluteTime <= absoluteTimeLimit) {

                try {

                    if ((*el)->isa(Note::EventType)) {
                        if ((*el)->has(BaseProperties::VELOCITY))
                            midiVelocity = (*el)->get
				<Int>(BaseProperties::VELOCITY);
                        else
                            midiVelocity = 127;

                        // Get the sounding time for the matching NOTE_OFF.
                        // We use SegmentPerformanceHelper::getSoundingDuration()
                        // to work out the tied duration of the NOTE.
                        timeT soundingDuration = helper.getSoundingDuration(el);
                        if (soundingDuration > 0) {

                            timeT midiEventEndTime = midiEventAbsoluteTime +
				soundingDuration * m_timingDivision /
				crotchetDuration;

                            long pitch = 60;
                            (*el)->get
				<Int>(BaseProperties::PITCH, pitch);
                            pitch += (*segment)->getTranspose();

                            // insert the NOTE_ON at the appropriate channel
                            //
                            midiEvent =
                                new MidiEvent(midiEventAbsoluteTime,
                                              MIDI_NOTE_ON | midiChannel,
                                              pitch,
                                              midiVelocity);

                            mtrack.push_back(midiEvent);

                            // insert the matching NOTE OFF
                            //
                            midiEvent =
                                new MidiEvent(midiEventEndTime,
                                              MIDI_NOTE_OFF | midiChannel,
                                              pitch,
                                              127); // full volume silence

                            mtrack.push_back(midiEvent);
                        }
                    } else if ((*el)->isa(PitchBend::EventType)) {
                        PitchBend pb(**el);
                        midiEvent =
                            new MidiEvent(midiEventAbsoluteTime,
                                          MIDI_PITCH_BEND | midiChannel,
                                          pb.getLSB(), pb.getMSB());

                        mtrack.push_back(midiEvent);
                    } else if ((*el)->isa(Rosegarden::Key::EventType)) {
                        Rosegarden::Key key(**el);

                        int accidentals = key.getAccidentalCount();
                        if (!key.isSharp())
                            accidentals = -accidentals;

                        // stack out onto the meta string
                        //
                        std::string metaMessage;
                        metaMessage += MidiByte(accidentals);
                        metaMessage += MidiByte(key.isMinor());

                        midiEvent =
                            new MidiEvent(midiEventAbsoluteTime,
                                          MIDI_FILE_META_EVENT,
                                          MIDI_KEY_SIGNATURE,
                                          metaMessage);

                        //mtrack.push_back(midiEvent);

                    } else if ((*el)->isa(Controller::EventType)) {
                        Controller c(**el);
                        midiEvent =
                            new MidiEvent(midiEventAbsoluteTime,
                                          MIDI_CTRL_CHANGE | midiChannel,
                                          c.getNumber(), c.getValue());

                        mtrack.push_back(midiEvent);
                    } else if ((*el)->isa(ProgramChange::EventType)) {
                        ProgramChange pc(**el);
                        midiEvent =
                            new MidiEvent(midiEventAbsoluteTime,
                                          MIDI_PROG_CHANGE | midiChannel,
                                          pc.getProgram());

                        mtrack.push_back(midiEvent);
                    } else if ((*el)->isa(SystemExclusive::EventType)) {
                        SystemExclusive s(**el);
                        std::string data = s.getRawData();

                        // check for closing EOX and add one if none found
                        //
                        if (MidiByte(data[data.length() - 1]) != MIDI_END_OF_EXCLUSIVE) {
                            data += MIDI_END_OF_EXCLUSIVE;
                        }

                        // construct plain SYSEX event
                        //
                        midiEvent = new MidiEvent(midiEventAbsoluteTime,
                                                  MIDI_SYSTEM_EXCLUSIVE,
                                                  data);

                        mtrack.push_back(midiEvent);

                    } else if ((*el)->isa(ChannelPressure::EventType)) {
                        ChannelPressure cp(**el);
                        midiEvent =
                            new MidiEvent(midiEventAbsoluteTime,
                                          MIDI_CHNL_AFTERTOUCH | midiChannel,
                                          cp.getPressure());

                        mtrack.push_back(midiEvent);
                    } else if ((*el)->isa(KeyPressure::EventType)) {
                        KeyPressure kp(**el);
                        midiEvent =
                            new MidiEvent(midiEventAbsoluteTime,
                                          MIDI_POLY_AFTERTOUCH | midiChannel,
                                          kp.getPitch(), kp.getPressure());

                        mtrack.push_back(midiEvent);
                    } else if ((*el)->isa(Text::EventType)) {
                        Text text(**el);
                        std::string metaMessage = text.getText();

                        MidiByte midiTextType = MIDI_TEXT_EVENT;

                        if (text.getTextType() == Text::Lyric) {
                            midiTextType = MIDI_LYRIC;
                        }

                        if (text.getTextType() != Text::Annotation) {
                            // (we don't write annotations)

                            midiEvent =
                                new MidiEvent(midiEventAbsoluteTime,
                                              MIDI_FILE_META_EVENT,
                                              midiTextType,
                                              metaMessage);

                            mtrack.push_back(midiEvent);
                        }
                    } else if ((*el)->isa(Note::EventRestType)) {
                        // skip legitimately
                    } else {
                        /*
                          cerr << "MidiFile::convertToMidi - "
                          << "unsupported MidiType \""
                          << (*el)->getType()
                          << "\" at export"
                          << std::endl;
                        */
                    }

                } catch (MIDIValueOutOfRange r) {
#ifdef MIDI_DEBUG
                    std::cerr << "MIDI value out of range at "
			      << (*el)->getAbsoluteTime() << std::endl;
#endif

                } catch (Event::NoData d) {
#ifdef MIDI_DEBUG
                    std::cerr << "Caught Event::NoData at "
			      << (*el)->getAbsoluteTime() << ", message is:"
			      << std::endl << d.getMessage() << std::endl;
#endif

                } catch (Event::BadType b) {
#ifdef MIDI_DEBUG
                    std::cerr << "Caught Event::BadType at "
			      << (*el)->getAbsoluteTime() << ", message is:"
			      << std::endl << b.getMessage() << std::endl;
#endif

                } catch (SystemExclusive::BadEncoding e) {
#ifdef MIDI_DEBUG
                    std::cerr << "Caught bad SysEx encoding at "
			      << (*el)->getAbsoluteTime() << std::endl;
#endif

                }

                if (segmentMidiDuration > 0) {
                    midiEventAbsoluteTime += segmentMidiDuration;
                } else
                    break;
            }
        }
    }

    // Now gnash through the MIDI events and turn the absolute times
    // into delta times.
    //
    //
    MidiTrack::iterator it;
    timeT deltaTime, lastMidiTime;

    for (TrackId i = 0; i < m_numberOfTracks; i++) {
        lastMidiTime = 0;

        // First sort the track with the MidiEvent comparator.  Use
        // stable_sort so that events with equal times are maintained
        // in their current order (important for e.g. bank-program
        // pairs, or the controllers at the start of the track which
        // should follow the program so we can treat them correctly
        // when re-reading).
        //
        std::stable_sort(m_midiComposition[i].begin(),
                         m_midiComposition[i].end(),
                         MidiEventCmp());

        for (it = m_midiComposition[i].begin();
                it != m_midiComposition[i].end();
                it++) {
            deltaTime = (*it)->getTime() - lastMidiTime;
            lastMidiTime = (*it)->getTime();
            (*it)->setTime(deltaTime);
        }

        // Insert end of track event (delta time = 0)
        //
        midiEvent = new MidiEvent(0, MIDI_FILE_META_EVENT,
                                  MIDI_END_OF_TRACK, "");

        m_midiComposition[i].push_back(midiEvent);

    }

    return ;
}



// Convert an integer into a two byte representation and
// write out to the MidiFile.
//
void
MidiFile::intToMidiBytes(std::ofstream* midiFile, int number)
{
    MidiByte upper;
    MidiByte lower;

    upper = (number & 0xFF00) >> 8;
    lower = (number & 0x00FF);

    *midiFile << (MidiByte) upper;
    *midiFile << (MidiByte) lower;

}

void
MidiFile::longToMidiBytes(std::ofstream* midiFile, unsigned long number)
{
    MidiByte upper1;
    MidiByte lower1;
    MidiByte upper2;
    MidiByte lower2;

    upper1 = (number & 0xff000000) >> 24;
    lower1 = (number & 0x00ff0000) >> 16;
    upper2 = (number & 0x0000ff00) >> 8;
    lower2 = (number & 0x000000ff);

    *midiFile << (MidiByte) upper1;
    *midiFile << (MidiByte) lower1;
    *midiFile << (MidiByte) upper2;
    *midiFile << (MidiByte) lower2;

}

// Turn a delta time into a MIDI time - overlapping into
// a maximum of four bytes using the MSB as the carry on
// flag.
//
std::string
MidiFile::longToVarBuffer(unsigned long number)
{
    std::string rS;

    long inNumber = number;
    long outNumber;

    // get the lowest 7 bits of the number
    outNumber = number & 0x7f;

    // Shift and test and move the numbers
    // on if we need them - setting the MSB
    // as we go.
    //
    while ((inNumber >>= 7 ) > 0) {
        outNumber <<= 8;
        outNumber |= 0x80;
        outNumber += (inNumber & 0x7f);
    }

    // Now move the converted number out onto the buffer
    //
    while (true) {
        rS += (MidiByte)(outNumber & 0xff);
        if (outNumber & 0x80)
            outNumber >>= 8;
        else
            break;
    }

    return rS;
}



// Write out the MIDI file header
//
bool
MidiFile::writeHeader(std::ofstream* midiFile)
{
    // Our identifying Header string
    //
    *midiFile << MIDI_FILE_HEADER.c_str();

    // Write number of Bytes to follow
    //
    *midiFile << (MidiByte) 0x00;
    *midiFile << (MidiByte) 0x00;
    *midiFile << (MidiByte) 0x00;
    *midiFile << (MidiByte) 0x06;

    // Write File Format
    //
    *midiFile << (MidiByte) 0x00;
    *midiFile << (MidiByte) m_format;

    // Number of Tracks we're writing out
    //
    intToMidiBytes(midiFile, m_numberOfTracks);

    // Timing Division
    //
    intToMidiBytes(midiFile, m_timingDivision);

    return (true);
}

// Write a MIDI track to file
//
bool
MidiFile::writeTrack(std::ofstream* midiFile, TrackId trackNumber)
{
    bool retOK = true;
    MidiByte eventCode = 0;
    MidiTrack::iterator midiEvent;

    // First we write into the trackBuffer, then write it out to the
    // file with it's accompanying length.
    //
    string trackBuffer;

    long progressTotal = m_midiComposition[trackNumber].size();
    long progressCount = 0;

    for (midiEvent = m_midiComposition[trackNumber].begin();
            midiEvent != m_midiComposition[trackNumber].end();
            midiEvent++) {
        // Write the time to the buffer in MIDI format
        //
        //
        trackBuffer += longToVarBuffer((*midiEvent)->getTime());

        if ((*midiEvent)->isMeta()) {
            trackBuffer += MIDI_FILE_META_EVENT;
            trackBuffer += (*midiEvent)->getMetaEventCode();

            // Variable length number field
            trackBuffer += longToVarBuffer((*midiEvent)->
                                           getMetaMessage().length());

            trackBuffer += (*midiEvent)->getMetaMessage();
        } else {
            // Send the normal event code (with encoded channel information)
            //
            // Fix for 674731 by Pedro Lopez-Cabanillas (20030531)
            if (((*midiEvent)->getEventCode() != eventCode) ||
                    ((*midiEvent)->getEventCode() == MIDI_SYSTEM_EXCLUSIVE)) {
                trackBuffer += (*midiEvent)->getEventCode();
                eventCode = (*midiEvent)->getEventCode();
            }

            // Send the relevant data
            //
            switch ((*midiEvent)->getMessageType()) {
            case MIDI_NOTE_ON:
            case MIDI_NOTE_OFF:
            case MIDI_POLY_AFTERTOUCH:
                trackBuffer += (*midiEvent)->getData1();
                trackBuffer += (*midiEvent)->getData2();
                break;

            case MIDI_CTRL_CHANGE:
                trackBuffer += (*midiEvent)->getData1();
                trackBuffer += (*midiEvent)->getData2();
                break;

            case MIDI_PROG_CHANGE:
                trackBuffer += (*midiEvent)->getData1();
                break;

            case MIDI_CHNL_AFTERTOUCH:
                trackBuffer += (*midiEvent)->getData1();
                break;

            case MIDI_PITCH_BEND:
                trackBuffer += (*midiEvent)->getData1();
                trackBuffer += (*midiEvent)->getData2();
                break;

            case MIDI_SYSTEM_EXCLUSIVE:

                // write out message length
                trackBuffer +=
                    longToVarBuffer((*midiEvent)->getMetaMessage().length());

                // now the message
                trackBuffer += (*midiEvent)->getMetaMessage();

                break;

            default:
#ifdef MIDI_DEBUG

                std::cerr << "MidiFile::writeTrack()"
                << " - cannot write unsupported MIDI event"
                << endl;
#endif

                break;
            }
        }

        // For the moment just keep the app updating until we work
        // out a good way of accounting for this write.
        //
        ++progressCount;

        if (progressCount % 500 == 0) {
            emit setProgress(progressCount * 100 / progressTotal);
            kapp->tqprocessEvents(500);
        }
    }

    // Now we write the track - First the standard header..
    //
    *midiFile << MIDI_TRACK_HEADER.c_str();

    // ..now the length of the buffer..
    //
    longToMidiBytes(midiFile, (long)trackBuffer.length());

    // ..then the buffer itself..
    //
    *midiFile << trackBuffer;

    return (retOK);
}

// Writes out a MIDI file from the internal Midi representation
//
bool
MidiFile::write()
{
    bool retOK = true;

    std::ofstream *midiFile =
        new std::ofstream(m_fileName.c_str(), ios::out | ios::binary);


    if (!(*midiFile)) {
#ifdef MIDI_DEBUG
        std::cerr << "MidiFile::write() - can't write file" << endl;
#endif

        m_format = MIDI_FILE_NOT_LOADED;
        return false;
    }

    // Write out the Header
    //
    writeHeader(midiFile);

    // And now the tracks
    //
    for (TrackId i = 0; i < m_numberOfTracks; i++ )
        if (!writeTrack(midiFile, i))
            retOK = false;

    midiFile->close();

    if (!retOK)
        m_format = MIDI_FILE_NOT_LOADED;

    return (retOK);
}

// Delete dead NOTE OFF and NOTE ON/Zero Velocty Events after
// reading them and modifying their relevant NOTE ONs
//
bool
MidiFile::consolidateNoteOffEvents(TrackId track)
{
    MidiTrack::iterator nOE, mE = m_midiComposition[track].begin();
    bool notesOnTrack = false;
    bool noteOffFound;

    for (;mE != m_midiComposition[track].end(); mE++) {
        if ((*mE)->getMessageType() == MIDI_NOTE_ON && (*mE)->getVelocity() > 0) {
            // We've found a note - flag it
            //
            if (!notesOnTrack)
                notesOnTrack = true;

            noteOffFound = false;

            for (nOE = mE; nOE != m_midiComposition[track].end(); nOE++) {
                if (((*nOE)->getChannelNumber() == (*mE)->getChannelNumber()) &&
                        ((*nOE)->getPitch() == (*mE)->getPitch()) &&
                        ((*nOE)->getMessageType() == MIDI_NOTE_OFF ||
                         ((*nOE)->getMessageType() == MIDI_NOTE_ON &&
                          (*nOE)->getVelocity() == 0x00))) {
                    (*mE)->setDuration((*nOE)->getTime() - (*mE)->getTime());

                    delete *nOE;
                    m_midiComposition[track].erase(nOE);

                    noteOffFound = true;
                    break;
                }
            }

            // If no matching NOTE OFF has been found then set
            // Event duration to length of Segment
            //
            if (noteOffFound == false) {
                --nOE; // avoid crash due to nOE == track.end()
                (*mE)->setDuration((*nOE)->getTime() - (*mE)->getTime());
            }
        }
    }

    return notesOnTrack;
}

// Clear down the MidiFile Composition
//
void
MidiFile::clearMidiComposition()
{
    for (MidiComposition::iterator ci = m_midiComposition.begin();
            ci != m_midiComposition.end(); ++ci) {

        //std::cerr << "MidiFile::clearMidiComposition: track " << ci->first << std::endl;

        for (MidiTrack::iterator ti = ci->second.begin();
                ti != ci->second.end(); ++ti) {
            delete *ti;
        }

        ci->second.clear();
    }

    m_midiComposition.clear();
    m_trackChannelMap.clear();
}

// Doesn't do anything yet - doesn't need to.  We need to satisfy
// the pure virtual function in the base class.
//
void
MidiFile::close()
{}



}

#include "MidiFile.moc"