/usr/share/songwrite/song.py is in songwrite 0.14-8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | # SongWrite
# Copyright (C) 2001-2004 Jean-Baptiste LAMY -- jibalamy@free.fr
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
from __future__ import nested_scopes
import sys, os, struct, bisect, math, types
from xml.sax.saxutils import escape
VERSION = "0.14"
class SongwriteError(StandardError):
pass
class TimeError(SongwriteError):
def __init__(self, time, partition = None, note = None):
self.time = time
self.partition = partition
self.note = note
self.args = time, partition, note
def __unicode__(self):
return _("__%s__" % self.__class__.__name__)
class UnsingablePartitionError(TimeError):
pass
class _XMLContext:
def __init__(self):
self._next_id = 0
self._ids = {}
def id_for(self, obj):
if obj is None: return ""
id = self._ids.get(obj)
if id is None:
self._next_id += 1
self._ids[obj] = self._next_id
return self._next_id
return id
def note_label(value):
"""note_label(value) -> string -- Return the string (e.g. "C(2)") for the given note int value."""
if value == -1: return "_"
return _("note_%s" % (value % 12,)) + u"(%s)" % (value / 12,)
DURATIONS = {
384 : "Whole",
192 : "Half",
96 : "Quarter",
48 : "Eighth",
24 : "Sixteenth",
12 : "Thirty-second",
}
def duration_label(duration):
"""duration_label(duration) -> string -- Return the string (e.g. "Eighth") for the given note int duration."""
global DURATIONS
dur = DURATIONS.get(duration)
if dur: return _(dur)
dur = DURATIONS.get(int(duration / 1.5))
if dur: return _(dur) + u" (.)"
dur = DURATIONS.get(int(duration * 1.5))
if dur: return _(dur) + u" (3)"
return u"???"
class Song:
def __init__(self):
import getpass, time
self.authors = u""
self.title = u""
self.copyright = u""
self.comments = u""
self.partitions = []
self.mesures = [Mesure(0)]
self.lang = unicode(os.environ.get("LANG", "en")[:2])
self.version = 0.9
self.playlist = Playlist(self)
self.filename = ""
# def __del__(self):
# print "del song %s !!!" % self.title
def __setstate__(self, state):
self.__dict__ = state
if not state.has_key("lang"): # New in 0.4
self.lang = unicode(os.environ.get("LANG", "en")[:2])
if not state.has_key("version"): # New in 0.5
self.version = 0.4 # Or older...
if self.version < 0.5:
self.version = 0.6
# Time unit has changed between 0.5 and 0.6
durations = {
256 : 384,
128 : 192,
64 : 96,
32 : 48,
16 : 24,
8 : 12,
384 : 576,
192 : 288,
96 : 144,
48 : 72,
24 : 36,
12 : 18,
170 : 256,
171 : 256,
85 : 128,
86 : 128,
42 : 64,
43 : 64,
21 : 32,
22 : 32,
10 : 16,
11 : 16,
5 : 8,
6 : 8,
}
for mesure in self.mesures:
mesure.time = int(1.5 * mesure.time)
mesure.duration = int(1.5 * mesure.duration)
mesure.tempo = int(1.5 * mesure.tempo)
for partition in self.partitions:
if isinstance(partition, Partition):
for note in partition.notes:
if note.duration in (21, 22):
x = note.time % 64
note.time = int((note.time - x) * 1.5) + ((x > 0) * 32) + ((x > 30) * 32)
elif note.duration in (10, 11):
x = note.time % 32
note.time = int((note.time - x) * 1.5) + ((x > 0) * 16) + ((x > 15) * 16)
elif note.duration in (5, 6):
x = note.time % 16
note.time = int((note.time - x) * 1.5) + ((x > 0) * 8) + ((x > 7) * 8)
else:
note.time = int(note.time * 1.5)
note.duration = durations[note.duration]
if self.version < 0.7:
self.version = 0.7
# We now use unicode !
if isinstance(self.authors , str): self.authors = unicode(self.authors, "latin")
if isinstance(self.title , str): self.title = unicode(self.title, "latin")
if isinstance(self.copyright , str): self.copyright = unicode(self.copyright, "latin")
if isinstance(self.comments , str): self.comments = unicode(self.comments, "latin")
if isinstance(self.lang , str): self.lang = unicode(self.lang, "latin")
for partition in self.partitions:
if isinstance(partition.header, str): partition.header = unicode(partition.header, "latin")
if hasattr(partition, "volume"):
partition.volume = partition.volume * 2
if partition.volume == 127 * 2: partition.volume = 255
if isinstance(partition, Lyrics):
for note in partition.notes:
if isinstance(note.text, str): note.text = unicode(note.text, "latin")
if self.version < 0.9:
self.version = 0.9
self.playlist = Playlist(self)
self.playlist.analyse()
def addmesure(self, mesure = None):
if mesure is None:
previous = self.mesures[-1]
mesure = Mesure(previous.time + previous.duration, previous.tempo, previous.rythm1, previous.rythm2, previous.syncope)
self.mesures.append(mesure)
return mesure
def mesurebefore(self, time):
if time > self.mesures[-1].endtime(): return self.mesures[-1]
i = bisect.bisect_right(self.mesures, time) - 2
if i < 0: return None
return self.mesures[i]
# previous = None
# for mesure in self.mesures:
# if mesure.endtime() > time: return previous
# previous = mesure
# return previous
def mesure_at(self, time, create = 0):
mesure = self.mesures[bisect.bisect_right(self.mesures, time) - 1]
if create:
while time >= mesure.endtime(): mesure = self.addmesure()
elif time >= mesure.endtime(): return None
return mesure
#for mesure in self.mesures:
# if mesure.endtime() > time: return mesure
#if create:
# while 1:
# mesure = self.addmesure()
# if mesure.endtime() > time: return mesure
def rythm_changed(self):
time = 0
for mesure in self.mesures:
mesure.time = time
time = time + mesure.duration
# Check if we need to add or remove some mesures.
maxtime = max(map(lambda partition: partition.endtime(), self.partitions))
while maxtime >= self.mesures[-1].endtime(): self.addmesure()
while maxtime < self.mesures[-1].time: del self.mesures[-1]
def midi(self, start_time = 0, end_time = sys.maxint, rich_midi_tablature = 0):
midifier = _Midi()
for partition in self.partitions: partition.midi(midifier, start_time, end_time)
if start_time != 0:
return midifier.data(self.mesures, rich_midi_tablature, ())
else:
return midifier.data(self.mesures, rich_midi_tablature, self.playlist)
def __unicode__(self): return self.title
def __repr__(self):
return u"""<Song %s
Mesures :
%s
Partitions :
%s
>""" % (
self.title,
u"\n".join(map(repr, self.mesures)),
u"\n".join(map(repr, self.partitions)),
)
def date(self):
import re
year = re.findall(u"[0-9]{2,4}", self.copyright)
if year: return year[0]
return u""
def __xml__(self, xml = None, context = None):
if not xml:
from cStringIO import StringIO
import codecs
_xml = StringIO()
xml = codecs.lookup("utf8")[3](_xml)
if not context: context = _XMLContext()
xml.write("""<?xml version="1.0" encoding="utf-8"?>
<song version="%s" lang="%s">
\t<title>%s</title>
\t<authors>%s</authors>
\t<copyright>%s</copyright>
\t<comments>%s</comments>
\t<bars>
""" % (VERSION, self.lang, escape(self.title), escape(self.authors), escape(self.copyright), escape(self.comments)))
for mesure in self.mesures: mesure.__xml__(xml, context)
xml.write('\t</bars>\n')
xml.write('\t<playlist>\n')
self.playlist.__xml__(xml, context)
xml.write('\t</playlist>\n')
for partition in self.partitions: partition.__xml__(xml, context)
xml.write('</song>')
xml.flush()
return xml
TooManyChannelError = "TooManyChannelError"
class _Midi: # A midifier, for internal use
def __init__(self):
self.next_channel_id = 0
self.events = []
midi = self
class BaseChannel: # A midi channel, for internal use
def __init__(self, id):
if id >= 16: raise TooManyChannelError
self.special_id = self.id = id
def set_init_events(self, init_events):
self.init_events = init_events
midi.events.extend(init_events)
def __int__(self): return self.id
class Channel(BaseChannel): # A normal midi channel, for internal use
def __init__(self):
BaseChannel.__init__(self, midi.next_channel_id)
midi.next_channel_id += 1
if midi.next_channel_id == 9: # Channel 9 is reserved for Drums !
midi.next_channel_id += 1
def fork_for_special_notes(self):
self.special_id = midi.next_channel_id
if self.special_id >= 16: raise TooManyChannelError
midi.next_channel_id += 1
midi.events.extend(map( # Transpose the initing events so it apply to the new channel -- the special channel must be initialized as the normal was !
lambda data: (data[0], data[1], chr(ord(data[2][0]) - self.id + self.special_id) + data[2][1:]),
self.init_events,
))
self.Channel = Channel
self.drums_channel = BaseChannel(9) # Play drums on channel 9 (10 if we start counting at 1)
def data(self, mesures, rich_midi_tablature = 0, playlist = None):
self.events.sort()
lasttime = 0
events2 = []
playbar_info = [] # For displaying the playbar !!!
time_factor = 1.0
old_tempo = mesures[0].tempo
real_time = 0
if playlist and playlist.playlist_items:
events1 = []
mesure2events = dict(map(lambda mesure: (mesure, []), mesures))
for time_event in self.events:
# Before event is a Midi meta-event that be stay JUST BEFORE event (this is for the Rich Tablature Midi Format)
if len(time_event) == 3:
time, mesure, event = time_event
source = None
else: time, mesure, event, source = time_event
if mesure is None:
events2.append(varLength(0) + event)
continue
if time < 0: time = 0
if mesure.syncope:
t = (time - mesure.time) % 96
if t < 48: t = t * 1.333333333 # First half, longer
else: t = t * 0.666666666 + 32 # Second half, shorter
time = mesure.time + ((time - mesure.time) / 96) * 96 + int(t)
mesure2events[mesure].append((time, event, source))
lasttime = time
mesuretime = 0
lasttime = 0
for item in playlist.playlist_items:
for mesure in mesures[item.from_mesure : item.to_mesure + 1]:
if mesure.tempo != old_tempo:
time_factor = time_factor * old_tempo / mesure.tempo
old_tempo = mesure.tempo
for time_event in mesure2events[mesure]:
time2, event, source = time_event
time = time2 - mesure.time + mesuretime
delta_time = (time - lasttime) * time_factor
real_time += delta_time
if ("\x90" <= event[0] < "\xA0") and ((not playbar_info) or (playbar_info[-1] != time)):
playbar_info.append((time2, real_time))
if rich_midi_tablature and source: # Add the rich midi tablature note event JUST BEFORE the event
rich_midi_event = source.rich_midi_event()
if rich_midi_event: events1.append((real_time, rich_midi_event))
events1.append((real_time, event))
lasttime = time
mesuretime += mesure.duration
events1.sort()
lasttime = time
for time, event in events1:
events2.append(varLength(int(time - lasttime)) + event)
lasttime = time
else:
for time_event in self.events:
# Before event is a Midi meta-event that be stay JUST BEFORE event (this is for the Rich Tablature Midi Format)
if len(time_event) == 3:
time, mesure, event = time_event
source = None
else: time, mesure, event, source = time_event
if time < 0: time = 0
if mesure:
if mesure.syncope:
t = (time - mesure.time) % 96
if t < 48: t = t * 1.333333333 # First half, longer
else: t = t * 0.666666666 + 32 # Second half, shorter
time = mesure.time + ((time - mesure.time) / 96) * 96 + int(t)
if mesure.tempo != old_tempo:
time_factor = time_factor * old_tempo / mesure.tempo
old_tempo = mesure.tempo
delta_time = (time - lasttime) * time_factor
real_time += delta_time
if ("\x90" <= event[0] < "\xA0") and ((not playbar_info) or (playbar_info[-1] != time)):
playbar_info.append((time, real_time))
if rich_midi_tablature and source: # Add the rich midi tablature note event JUST BEFORE the event
rich_midi_event = source.rich_midi_event()
if rich_midi_event:
events2.append(varLength(int(delta_time)) + rich_midi_event)
lasttime = time
events2.append(varLength(int(delta_time)) + event)
lasttime = time
events2.append(varLength(0) + END_TRACK)
return chunk("MThd", struct.pack(">hhh", 0, 1, mesures[0].tempo)) + chunk("MTrk", "".join(events2)), playbar_info
class TemporalData:
def midi(self, midifier, start_time, end_time): return ()
# the view property and the corresponding methods are added in this class
# (by adding a new super-class to it, what a hack !) by the "view" module.
def __unicode__(self):
text = self.header
endofline = text.find("\n")
if endofline != -1: return text[:endofline]
else: return text
class Partition(TemporalData):
def __init__(self, song):
self.song = song
self.notes = []
self.instrument = 24
self.chorus = 0
self.reverb = 0
self.header = ""
self.muted = 0
self.volume = 255
self.tonality = "C"
def __setstate__(self, state): # Compatibility with older format
self.__dict__.update(state)
if not state.has_key("header"): self.header = _("Guitar")
if not state.has_key("muted" ): self.muted = 0
if not state.has_key("volume"): self.volume = 255
def addnote(self, note):
bisect.insort(self.notes, note)
while note.time >= self.song.mesures[-1].endtime(): self.song.addmesure()
def notes_at(self, time):
if type(time) is types.IntType: time = Note(time, 0, 0)
return self.notes[bisect.bisect_left(self.notes, time) : bisect.bisect_right(self.notes, time)]
def notes_range(self, time1, time2):
if type(time1) is types.IntType: time1 = Note(time1, 0, 0)
if type(time2) is types.IntType: time2 = Note(time2, 0, 0)
return self.notes[bisect.bisect_left(self.notes, time1) : bisect.bisect_left(self.notes, time2)]
def note_before(self, time):
if type(time) is types.IntType: time = Note(time, 0, 0)
if (not self.notes) or (time.time <= self.notes[0].time): return None
return self.notes[bisect.bisect_left(self.notes, time) - 1]
def note_after(self, time):
if type(time) is types.IntType: time = Note(time, 0, 0)
if (not self.notes) or (time.time >= self.notes[-1].time): return None
return self.notes[bisect.bisect_right(self.notes, time)]
def delnote(self, note):
note.deleted()
self.notes.remove(note)
def endtime(self):
if self.notes: return self.notes[-1].endtime()
return 0
def midi(self, midifier, start_time, end_time):
if not self.muted:
if self.instrument == 128: # 128 means Drums
channel = midifier.drums_channel
channel.set_init_events((
(-1, None, struct.pack(">bbb", 0xB0 + channel.id, 0x5B, self.reverb )), # Reverb
(-1, None, struct.pack(">bbb", 0xB0 + channel.id, 0x5D, self.chorus )), # Chorus
(-1, None, struct.pack(">bbb", 0xB0 + channel.id, 0x07, self.volume / 2)), # Volume
))
else:
channel = midifier.Channel()
channel.set_init_events((
(-1, None, struct.pack(">bb" , 0xC0 + channel.id, self.instrument), self), # Instrument selection
(-1, None, struct.pack(">bbb", 0xB0 + channel.id, 0x5B, self.reverb )), # Reverb
(-1, None, struct.pack(">bbb", 0xB0 + channel.id, 0x5D, self.chorus )), # Chorus
(-1, None, struct.pack(">bbb", 0xB0 + channel.id, 0x07, self.volume / 2)), # Volume
))
# Check if some "special notes" (hammer, ...) are played at the same time that normal notes, and if so, play them on a different channel.
special_notes = filter(lambda note: isinstance(note, SpecialEffect), self.notes)
if special_notes:
# We must ALWAYS fork since we don't know when a note really ends...
channel.fork_for_special_notes()
mesure = self.song.mesures[0]
idmesure = 0
for note in self.notes:
while note.time >= mesure.endtime():
idmesure += 1
mesure = self.song.mesures[idmesure]
midifier.events.extend(note.midi_events(channel, mesure, start_time, end_time))
def rich_midi_event(self):
if not hasattr(self.view, "strings"): return None
return "\xff\x10%s\x01\x00%s" % (struct.pack(">b", len(self.view.strings) + 2),
"".join(map(lambda string: struct.pack(">b", string.basenote), self.view.strings)))
def voices(self, single_voice = 0):
"Gets the list of voices (non-overlapping sequence of notes) in this partition."
if single_voice:
voices = [[]]
for note in self.notes:
if self.is_in_chord(note) or self._clash_note_voice(note, voices[0]):
raise UnsingablePartitionError(note.time, self, self._clash_note_voice(note, voices[0]))
voices[0].append(note)
else:
voices = [[], []]
for note in self.notes:
if self.is_in_chord(note): voices[0].append(note) # Chords are not bass !
elif self._clash_note_voice(note, voices[0]): voices[1].append(note)
elif self._clash_note_voice(note, voices[1]): voices[0].append(note)
else:
if note.linked and note.linked_from: # Add with the other note !
voices[note.linked_from in voices[1]].append(note)
elif note.duration < 96: voices[0].append(note) # Too short for a bass !
else:
clashings = self.notes_at(note)
if len(clashings) == 1:
if getattr(note, "stringid", 6) >= 3: voices[1].append(note)
else: voices[0].append(note)
else:
clashings.sort(lambda a, b: cmp(a.value, b.value))
if note is clashings[0]: voices[1].append(note)
else: voices[0].append(note)
return voices
def __repr__(self):
return u"""<Partition
Notes :
%s
>""" % (
"\n".join(map(repr, self.notes)),
)
def is_in_chord(self, note):
"""Check if the given note is part of a chord."""
return len(self.notes_at(note)) >= 3
def _clash_note_voice(self, note, voice):
for n in voice:
if note.clash(n): return n # not self.is_in_chord(note)
return 0
def __xml__(self, xml, context):
xml.write("\t<partition")
for attr, val in self.__dict__.items():
if (not attr in ("header", "notes", "view", "song", "oldview")) and not attr.startswith("_"):
xml.write(' %s="%s"' % (attr, unicode(val)))
xml.write(">\n\t\t<header>%s</header>\n" % escape(self.header))
if hasattr(self, "view"): self.view.__xml__(xml, context)
xml.write("\t\t<notes>\n")
for note in self.notes: note.__xml__(xml, context)
xml.write("""\t\t</notes>
\t</partition>
""")
def Drums(song):
drums = Partition(song)
drums.instrument = 128
drums.header = ""
return drums
class Note:
linked = 0
must_be_linked_to = 0
def __init__(self, time = 0, duration = 0, value = 0, volume = 0xCC):
self.time = time
self.duration = duration
self.value = value
self.volume = volume
def endtime(self): return self.time + self.duration
def clash(self, other):
"Checks if this note clashes with (= overlaps) other, and are not part of the same chord."
return (self.endtime() > other.time) and (other.endtime() > self.time)
#return (self.time + self.duration > other.time) and (other.time + other.duration > self.time) and (not ((self.time == other.time) and (self.duration == other.duration)))
def dissimilarity(self, other):
"Gets a quantifier that quantifies how 2 notes differ."
dissimilarity = 2 * abs(self.duration - other.duration) + 2 * abs(self.value - other.value) + abs(self.volume - other.volume) / 5
if hasattr(self, "stringid") and hasattr(other, "stringid"):
dissimilarity = dissimilarity + 10 * abs(self.stringid - other.stringid)
return dissimilarity
def midi_events(self, channel, mesure, start_time, end_time):
if start_time <= self.time <= end_time:
return (self.time - start_time, mesure, struct.pack(">bbb", 0x90 + channel.id, self.value, self.volume), self), (self.time - start_time + self.duration, mesure, struct.pack(">bbb", 0x80 + channel.id, self.value, self.volume))
return ()
def rich_midi_event(self):
if not hasattr(self, "stringid"): return None
return "\xff\x11\x01" + struct.pack(">b", self.stringid)
def dotted (self):
return int(self.duration / 1.5) in DURATIONS.keys()
return self.duration in (9, 18, 36, 72, 144, 288, 576)
def is_triplet(self):
return int(self.duration * 1.5) in DURATIONS.keys()
return self.duration in (4, 8, 16, 32, 64, 128, 256)
def is_start_triplet(self):
return self.is_triplet() and ((self.time % int(self.duration * 1.5)) == 0)
def is_end_triplet(self):
return self.is_triplet() and (0 < (self.time % int(self.duration * 1.5)) < self.duration)
def base_duration(self):
"""Gets the duration of the note, without taking into account dot or triplet."""
dur = DURATIONS.keys()
if self.duration in dur: return self.duration
if int(self.duration / 1.5) in dur: return int(self.duration / 1.5)
if int(self.duration * 1.5) in dur: return int(self.duration * 1.5)
return self.duration
def link_to(self, other):
if other:
self ._link_to (other)
other._link_from(self)
def _link_to(self, other):
#print "linking %s to %s" % (self, other)
if other:
self.__class__ = LinkedNote
self.linked_to = other
self.linked_from = None
def _link_from(self, other):
#print "linking %s from %s" % (self, other)
if other:
self.__class__ = LinkedNote
self.linked_to = None
self.linked_from = other
def remove_effect(self):
self.__class__ = Note
def get_effect(self): return Note
def deleted(self): pass
def duration_with_link(self): return self.duration # No link
def __repr__(self):
s = u"<%s %s at %s" % (self.__class__.__name__, self.value, self.time)
if hasattr(self, "stringid"): s = s + u" on string %s" % self.stringid
s = s + u", duration %s, volume %s" % (self.duration, self.volume)
return s + ">"
def __eq__(self, other): return self is other
def __cmp__(self, other): return self.time - other.time
def __hash__(self): return id(self)
def __xml__(self, xml, context):
xml.write('\t\t\t<note pitch="%s" time="%s" duration="%s" volume="%s"' % (self.value, self.time / 96.0, self.duration / 96.0, self.volume))
if hasattr(self, "stringid"): xml.write(' string="%s"' % self.stringid)
xml.write('/>\n')
class LinkedNote(Note):
"A note that may be linked to or/and from another."
linked = 1
must_be_linked_to = 0
def __init__(self, *args):
Note.__init__(self, *args)
self.linked_from = self.linked_to = None
def midi_events(self, channel, mesure, start_time, end_time): return ()
def deleted(self):
if self.linked_to : self.link_to(None)
def link_to(self, other):
if self.linked_to: self.linked_to._link_from(None)
if other and other.linked and other.linked_from:
other.linked_from.link_to(None) # Call other._link_from(None) and other.linked_from._link_to(None)
self._link_to(other)
if other: other._link_from(self)
def _link_to(self, other):
if other:
self.linked_to = other
else:
self.linked_to = None
if (not self.linked_from) and (not self.must_be_linked_to): # No longer linked
self.__class__ = Note
del self.linked_to
del self.linked_from
def _link_from(self, other):
if other:
self.linked_from = other
else:
self.linked_from = None
if (not self.linked_to) and (not self.must_be_linked_to): # No longer linked
self.__class__ = Note
del self.linked_to
del self.linked_from
def duration_with_link(self):
if self.linked_to: return self.duration + self.linked_to.duration_with_link()
return self.duration
def min_max_values_in_link(self):
"LinkedNote.min_max_values_in_link() -> min, max. Return the minimal and maximal note's value in the group of linked notes."
if self.linked_from: return self.linked_from.min_max_values_in_link() # Start at the beginning of the link !
return self._min_max_values_in_link()
def _min_max_values_in_link(self):
if self.linked_to:
_min, _max = self.linked_to._min_max_values_in_link()
return min(_min, self.value), max(_max, self.value)
else: return self.value, self.value # no further link
def first_value(self):
"Gets the value of the first note of this group of linked notes."
if self.linked_from: return self.linked_from.first_value()
return self.value
def remove_effect(self):
self.__class__ = LinkedNote
self.link_to(None)
def __repr__(self):
s = Note.__repr__(self)[:-1]
if self.linked_to : s = s + u" linked to note at %s" % self.linked_to.time
if self.linked_from: s = s + u" linked from note at %s" % self.linked_from.time
return s + u">"
def __xml__(self, xml, context):
xml.write('\t\t\t<note pitch="%s" time="%s" duration="%s" volume="%s"' % (self.value, self.time / 96.0, self.duration / 96.0, self.volume))
if self.linked_to: xml.write(' linked_to="%s"' % context.id_for(self.linked_to))
if self.linked_from: xml.write(' id="%s"' % context.id_for(self))
if hasattr(self, "stringid"): xml.write(' string="%s"' % self.stringid)
xml.write('/>\n')
class SpecialEffect:
def init_effect(self):
"init_effect(note) -- Initialize the given note with this class of effect."
pass
def get_effect(self): return self.__class__
class HammerNote(SpecialEffect, LinkedNote):
must_be_linked_to = 1
def link_type(self):
if self.value > self.linked_to.value: return "pull"
elif self.value < self.linked_to.value: return "hammer"
else: return "link"
def midi_events(self, channel, mesure, start_time, end_time):
if start_time <= self.time <= end_time:
_min, _max = self.min_max_values_in_link()
midi_events = [] # Here we'll use the "special ID" channel, and not the channel normal ID, to avoid to change other notes played in parallel on the normal channel
if _max - 2 <= self.first_value() <= _min + 2:
if not self.linked_from:
midi_events.append((self.time - start_time, mesure, struct.pack(">bbb", 0x90 + channel.special_id, self.value, self.volume), self))
midi_events.append((self.time - start_time + self.duration_with_link(), mesure, struct.pack(">bbb", 0x80 + channel.special_id, self.value, self.volume)))
midi_events.append((self.time - start_time, mesure, struct.pack(">bbb", 0xE0 + channel.special_id, 63, 63))) # Reset initial pitch bend
midi_events.append((self.linked_to.time - start_time, mesure, struct.pack(">bbb", 0xE0 + channel.special_id, 63, 31.5 * (self.linked_to.value - self.first_value() + 2)))) # Pitch bend
else:
if not self.linked_from:
midi_events.append((self.time - start_time, mesure, struct.pack(">bbb", 0x90 + channel.special_id, _min + 2, self.volume), self))
midi_events.append((self.time - start_time + self.duration_with_link(), mesure, struct.pack(">bbb", 0x80 + channel.special_id, _min + 2, self.volume)))
midi_events.append((self.time - start_time, mesure, struct.pack(">bbb", 0xE0 + channel.special_id, 63, 31.5 * (self.value - _min)))) # Initial pitch bend
midi_events.append((self.linked_to.time - start_time, mesure, struct.pack(">bbb", 0xE0 + channel.special_id, 63, 31.5 * (self.linked_to.value - _min)))) # Pitch bend
if not self.linked_to:
pass
# No need to reset : pitch bend is applied only to the "special" channel
#midi_events.append((self.time - start_time + self.duration_with_link(), struct.pack(">bbb", 0xE0 + channel.special_id, 64, 64))) # Reset pitch bend
return tuple(midi_events)
return ()
def rich_midi_event(self):
if not hasattr(self, "stringid"): return None
dif = cmp(self.value, self.linked_to.value)
if dif < 0: return "\xff\x11\x02%s\x01" % struct.pack(">b", self.stringid)
elif dif > 0: return "\xff\x11\x02%s\x02" % struct.pack(">b", self.stringid)
else: return "\xff\x11\x02%s\x01" % struct.pack(">b", self.stringid) # Not supported by Rich Tablature Midi ???
def __xml__(self, xml, context):
xml.write('\t\t\t<note pitch="%s" time="%s" duration="%s" volume="%s" fx="hammer" linked_to="%s"' % (self.value, self.time / 96.0, self.duration / 96.0, self.volume, context.id_for(self.linked_to)))
if self.linked_from: xml.write(' id="%s"' % context.id_for(self))
if hasattr(self, "stringid"): xml.write(' string="%s"' % self.stringid)
xml.write('/>\n')
class SlideNote(SpecialEffect, LinkedNote):
must_be_linked_to = 1
def midi_events(self, channel, mesure, start_time, end_time):
if start_time <= self.time <= end_time:
_min, _max = self.min_max_values_in_link()
midi_events = [] # Here we'll use the "special ID" channel, and not the channel normal ID, to avoid to change other notes played in parallel on the normal channel
if _max - 2 <= self.first_value() <= _min + 2:
if not self.linked_from:
midi_events.append((self.time - start_time , mesure, struct.pack(">bbb", 0x90 + channel.special_id, self.value, self.volume), self))
midi_events.append((self.time - start_time + self.duration_with_link(), mesure, struct.pack(">bbb", 0x80 + channel.special_id, self.value, self.volume)))
midi_events.append((self.time - start_time , mesure, struct.pack(">bbb", 0xE0 + channel.special_id, 63, 63))) # Reset initial pitch bend
delta_time = self.linked_to.time - self.time
delta_value = self.linked_to.value - self.first_value()
for i in xrange(10):
f = i / 10.0
midi_events.append((self.time + int(f * delta_time) - start_time, mesure, struct.pack(">bbb", 0xE0 + channel.special_id, 63, 31.5 * (f * delta_value + 2)))) # Pitch bend
else:
if not self.linked_from:
midi_events.append((self.time - start_time, mesure, struct.pack(">bbb", 0x90 + channel.special_id, _min + 2, self.volume), self))
midi_events.append((self.time - start_time + self.duration_with_link(), mesure, struct.pack(">bbb", 0x80 + channel.special_id, _min + 2, self.volume)))
midi_events.append((self.time - start_time, mesure, struct.pack(">bbb", 0xE0 + channel.special_id, 63, 31.5 * (self.value - _min)))) # Initial pitch bend
delta_time = self.linked_to.time - self.time
delta_value = self.linked_to.value - self.value
for i in xrange(10):
f = i / 10.0
midi_events.append((self.time + int(f * delta_time) - start_time, mesure, struct.pack(">bbb", 0xE0 + channel.special_id, 63, 31.5 * (f * delta_value + self.value - _min)))) # Pitch bend
return tuple(midi_events)
return ()
def rich_midi_event(self):
if not hasattr(self, "stringid"): return None
if self.value < self.linked_to.value: return "\xff\x11\x02%s\x03" % struct.pack(">b", self.stringid)
else: return "\xff\x11\x02%s\x04" % struct.pack(">b", self.stringid)
def __xml__(self, xml, context):
xml.write('\t\t\t<note pitch="%s" time="%s" duration="%s" volume="%s" fx="slide" linked_to="%s"' % (self.value, self.time / 96.0, self.duration / 96.0, self.volume, context.id_for(self.linked_to)))
if self.linked_from: xml.write(' id="%s"' % context.id_for(self))
if hasattr(self, "stringid"): xml.write(' string="%s"' % self.stringid)
xml.write('/>\n')
class BendNote(SpecialEffect, Note):
def midi_events(self, channel, mesure, start_time, end_time):
if start_time <= self.time <= end_time:
midi_events = [] # Here we'll use the "special ID" channel, and not the channel normal ID, to avoid to change other notes played in parallel on the normal channel
midi_events.append((self.time - start_time , mesure, struct.pack(">bbb", 0x90 + channel.special_id, self.value, self.volume), self))
midi_events.append((self.time - start_time + self.duration_with_link(), mesure, struct.pack(">bbb", 0x80 + channel.special_id, self.value, self.volume)))
midi_events.append((self.time - start_time , mesure, struct.pack(">bbb", 0xE0 + channel.special_id, 63, 63))) # Reset initial pitch bend
delta_time = self.duration
delta_value = 2.0 * self.pitch
for i in xrange(10):
f = i / 10.0
midi_events.append((self.time + int(f * delta_time) - start_time, mesure, struct.pack(">bbb", 0xE0 + channel.special_id, 63, 31.5 * (f * delta_value + 2)))) # Pitch bend
return tuple(midi_events)
return ()
def init_effect(self, pitch = 0.5):
self.pitch = pitch
def remove_effect(self):
del self.pitch # Useless attribute
Note.remove_effect(self)
def rich_midi_event(self):
if not hasattr(self, "stringid"): return None
return "\xff\x11\x03%s\x0C%s" % (struct.pack(">b", self.stringid), struct.pack(">b", self.pitch / 0.25))
def __xml__(self, xml, context):
xml.write('\t\t\t<note pitch="%s" time="%s" duration="%s" volume="%s" fx="bend" bend_pitch="%s"' % (self.value, self.time / 96.0, self.duration / 96.0, self.volume, self.pitch))
if hasattr(self, "stringid"): xml.write(' string="%s"' % self.stringid)
xml.write('/>\n')
class TremoloNote(SpecialEffect, Note):
def midi_events(self, channel, mesure, start_time, end_time):
if start_time <= self.time <= end_time:
midi_events = [] # Here we'll use the "special ID" channel, and not the channel normal ID, to avoid to change other notes played in parallel on the normal channel
midi_events.append((self.time - start_time, mesure, struct.pack(">bbb", 0x90 + channel.special_id, self.value, self.volume), self))
midi_events.append((self.time - start_time + self.duration_with_link(), mesure, struct.pack(">bbb", 0x80 + channel.special_id, self.value, self.volume)))
midi_events.append((self.time - start_time, mesure, struct.pack(">bbb", 0xE0 + channel.special_id, 63, 63))) # Reset initial pitch bend
val = 0.0
for time in xrange(self.time - start_time, self.time - start_time + self.duration, 2):
midi_events.append((time, mesure, struct.pack(">bbb", 0xE0 + channel.special_id, 63, 31.5 * (math.sin(val) * 0.3 + 2)))) # Pitch bend
val += 0.3
return tuple(midi_events)
return ()
def rich_midi_event(self):
if not hasattr(self, "stringid"): return None
return "\xff\x11\x02%s\x0A" % struct.pack(">b", self.stringid)
def __xml__(self, xml, context):
xml.write('\t\t\t<note pitch="%s" time="%s" duration="%s" volume="%s" fx="tremolo"' % (self.value, self.time / 96.0, self.duration / 96.0, self.volume))
if hasattr(self, "stringid"): xml.write(' string="%s"' % self.stringid)
xml.write('/>\n')
class DeadNote(SpecialEffect, Note):
def midi_events(self, channel, mesure, start_time, end_time):
if start_time <= self.time <= end_time:
midi_events = [] # Here we'll use the "special ID" channel, and not the channel normal ID, to avoid to change other notes played in parallel on the normal channel
midi_events.append((self.time - start_time, mesure, struct.pack(">bbb", 0x90 + channel.special_id, self.value, self.volume), self))
midi_events.append((self.time - start_time + self.duration_with_link(), mesure, struct.pack(">bbb", 0x80 + channel.special_id, self.value, self.volume)))
midi_events.append((self.time - start_time, mesure, struct.pack(">bbb", 0xE0 + channel.special_id, 63, 63))) # Reset initial pitch bend
midi_events.append((self.time - start_time + 16, mesure, struct.pack(">bbb", 0xB0 + channel.special_id, 120, 0))) # Stop all sounds
return tuple(midi_events)
return ()
def rich_midi_event(self):
if not hasattr(self, "stringid"): return None
return "\xff\x11\x02%s\x0E" % struct.pack(">b", self.stringid)
def __xml__(self, xml, context):
xml.write('\t\t\t<note pitch="%s" time="%s" duration="%s" volume="%s" fx="dead"' % (self.value, self.time / 96.0, self.duration / 96.0, self.volume))
if hasattr(self, "stringid"): xml.write(' string="%s"' % self.stringid)
xml.write('/>\n')
class RollNote(SpecialEffect, Note):
def midi_events(self, channel, mesure, start_time, end_time):
if start_time <= self.time <= end_time:
return (self.time - start_time + self.decal, mesure, struct.pack(">bbb", 0x90 + channel.id, self.value, self.volume), self), (self.time - start_time + self.duration, mesure, struct.pack(">bbb", 0x80 + channel.id, self.value, self.volume))
return ()
def init_effect(self, decal = 2):
self.decal = decal
def remove_effect(self):
del self.decal # Useless attribute
Note.remove_effect(self)
def rich_midi_event(self):
if not hasattr(self, "stringid"): return None
if self.decal: return Note.rich_midi_event(self)
return "\xff\x11\x02%s\x06" % struct.pack(">b", self.stringid)
def __xml__(self, xml, context):
xml.write('\t\t\t<note pitch="%s" time="%s" duration="%s" volume="%s" fx="roll"' % (self.value, self.time / 96.0, self.duration / 96.0, self.volume))
if hasattr(self, "stringid"): xml.write(' string="%s"' % self.stringid)
xml.write('/>\n')
class Lyrics(TemporalData):
def __init__(self, song):
self.song = song
self.notes = self.lyrics = []
self.header = ""
def __setstate__(self, state): # Compatibility with old format
self.__dict__ = state
if not state.has_key("header"): self.header = _("Lyric")
def addlyric(self, lyric):
bisect.insort(self.lyrics, lyric)
def dellyric(self, lyric):
self.lyrics.remove(lyric)
addnote = addlyric
delnote = dellyric
def endtime(self):
if self.lyrics: return self.lyrics[-1].endtime()
return 0
def __repr__(self):
return u"""<Lyrics :
%s
>""" % (
"\n".join(map(repr, self.lyrics)),
)
def to_lyrics2(self):
texts = map(lambda lyric: lyric.text.split("\n"), self.notes)
text = u""
cont = 1
i = 0
while cont:
cont = 0
for t in texts:
if i < len(t):
text = text + "\t" + t[i]
cont = 1
text = text + "\n"
i = i + 1
text = text.replace(" ", "\t").replace("- ", "-\t")
lyrics2 = Lyrics2(self.song, text[1:-1])
lyrics2.header = self.header
return lyrics2
class Lyric:
def __init__(self, mesure, text = u""):
self.mesure = mesure
self.text = text
def endtime(self): return self.mesure.endtime()
def midi_events(self, channel, start_time, end_time): return ()
def __unicode__(self): return self.text
def __repr__(self): return u"<Lyric %s at %s>" % (self.text, self.mesure.time)
def __eq__(self, other): return self is other
def __cmp__(self, other): return self.mesure.time - other.mesure.time
class Lyrics2(TemporalData):
def __init__(self, song, text = u""):
self.song = song
self.header = ""
self.text = text
def get_melody(self):
index = self.song.partitions.index(self)
while index >= 0:
if isinstance(self.song.partitions[index], Partition):
return self.song.partitions[index]
index = index - 1
return None
def endtime(self): return 0
def __repr__(self):
return u"""<Lyrics :
%s
>""" % self.text
def __xml__(self, xml, context):
xml.write(u"""\t<lyrics>
\t\t<header>%s</header>
""" % escape(self.header))
if hasattr(self, "view"): self.view.__xml__(xml, context)
text = self.text.replace("\\\\", "<br/>")
if text and (text[-1] == "\n"): text = text[:-1]
text = text.replace("\n", "<br-verse/>")
xml.write(u"""\t\t<text>
%s
\t\t</text>
\t</lyrics>
""" % text)
#""" % (self.text.replace("\\\\", "<br/>").replace("\n", "<br-verse/>")))
class Sounds(TemporalData):
def __init__(self, song):
self.song = song
self.sounds = []
self.notes = self.sounds
self.header = ""
def addsound(self, sound):
bisect.insort(self.sounds, sound)
while sound.time >= self.song.mesures[-1].endtime(): self.song.addmesure()
def delsound(self, sound):
self.sounds.remove(sound)
addnote = addsound
delnote = delsound
def endtime(self):
if self.sounds: return self.sounds[-1].endtime()
return 0
def __repr__(self):
return u"""<Sounds :
%s
>""" % (
"\n".join(map(repr, self.sounds)),
)
class Sound:
def __init__(self, time, bsound):
self.time = time
self.bsound = bsound
def endtime(self): return self.time + self.bsound.duration
def __repr__(self):
s = "<Base Sound %s at %s" % (self.bsound.filename, self.time)
return s + ">"
def __deepcopy__(self, memo):
dict = self.__dict__.copy()
del dict["bsound"]
clone = Sound(self.time, self.bsound)
clone.__dict__.update(dict)
return clone
# TO DO ok ?
def __eq__(self, other): return self is other
def __cmp__(self, other): return self.time - other.time
def __getstate__(self):
dict = self.__dict__.copy()
dict["bsound"] = self.bsound.filename
# TO DO relative filename
return dict
def __setstate__(self, state):
self.__dict__ = state
filename = self.bsound
import gtkwav
self.bsound = gtkwav.load_sound(filename)
class Mesure:
def __init__(self, time, tempo = 60, rythm1 = 4, rythm2 = 4, syncope = 0):
self.time = time
self.tempo = tempo
self.rythm1 = rythm1
self.rythm2 = rythm2
self.syncope = syncope
self.compute_duration()
def compute_duration(self):
self.duration = 384 / self.rythm2 * self.rythm1
if not((self.rythm2 == 4) or ((self.rythm2 == 8) and (self.rythm1 % 3 == 0))):
print "Warning: unsupported rythm: %s/%s" % (self.rythm1, self.rythm2)
def endtime(self): return self.time + self.duration
def setrythm(self, tempo = 60, rythm1 = 4, rythm2 = 4, syncope = 0):
if (rythm2 == 4) or ((rythm2 == 8) and (rythm1 % 3 == 0)):
self.duration = 384 / rythm2 * rythm1
self.tempo = tempo
self.rythm1 = rythm1
self.rythm2 = rythm2
self.syncope = syncope
else: raise UnsupportedRythmError, "%s/%s" % (rythm1, rythm2)
def __repr__(self): return "<Mesure at %s, duration %s>" % (self.time, self.duration)
def __xml__(self, xml, context):
xml.write("""\t\t<bar rythm="%s/%s" tempo="%s" syncope="%s"/>\n""" % (self.rythm1, self.rythm2, self.tempo, self.syncope))
def __eq__(self, other): return self is other
def __cmp__(self, other):
if isinstance(other, Mesure): return cmp(self.time, other.time)
return cmp(self.time, other)
__hash__ = object.__hash__
class Playlist:
def __init__(self, song):
self.song = song
self.playlist_items = []
self.symbols = {}
def __unicode__(self): return _("playlist")
def __str__ (self): return _("playlist")
def __xml__(self, xml, context):
for item in self.playlist_items:
xml.write("""\t\t<play from="%s" to="%s"/>\n""" % (item.from_mesure, item.to_mesure))
def analyse(self):
self.symbols.clear()
symbols = self.symbols
bornes = {}
for item in self.playlist_items: bornes[item.from_mesure] = bornes[item.to_mesure + 1] = 1
bornes = bornes.keys()
bornes.sort()
splitted_playlist = []
for item in self.playlist_items:
a = bisect.bisect_right(bornes, item.from_mesure)
b = bisect.bisect_left (bornes, item.to_mesure + 1)
if a == b: # No borne inside => OK
splitted_playlist.append(item)
else: # we need to split this one
cur = item.from_mesure
for borne in bornes[a : b + 1]:
splitted_playlist.append(PlaylistItem(self, cur, borne))
cur = borne
alternatives = {} # map a start block to its list of alternatives.
onces = []
too_complex = 0
next_new = 0
in_repeat = None
prev = prev2 = None
for item in splitted_playlist:
if item == prev:
if not alternatives.has_key(item):
alternatives[item] = []
elif in_repeat:
alts = alternatives[in_repeat]
if (item.from_mesure == next_new) or (len(filter(lambda i: i == item, alts)) == len(alts)):
alts.append(item)
in_repeat = None
else:
too_complex = 1
break
elif item == prev2:
in_repeat = item
if not alternatives.has_key(item): alternatives[item] = [prev]
elif item.from_mesure != next_new:
too_complex = 1
break
if next_new < item.to_mesure + 1: next_new = item.to_mesure + 1
prev2 = prev
prev = item
def add_to(mesure_id, code):
if mesure_id < len(self.song.mesures): mesure = self.song.mesures[mesure_id]
else: mesure = None # None means "at the end"
if symbols.has_key(mesure): symbols[mesure].append(code)
else: symbols[mesure] = [code]
# Do NOT remove comment ("% ...") at the end of Lilypond code !
# They are used by Songwrite drawing stuff.
if too_complex: # Too complex...
print "Warning: playlist is too complex!"
for borne in bornes[ 1:]: add_to(borne, r"} % end repeat")
for borne in bornes[:-1]: add_to(borne, r"\repeat volta 2 {")
else:
for start, alts in alternatives.iteritems():
add_to(start.from_mesure, r"\repeat volta %s {" % (len(alts) or 2))
if alts:
add_to(start.to_mesure + 1, r"} % end repeat with alternatives")
add_to(alts[0].from_mesure, r"\alternative {")
for i in range(len(alts)):
alt = alts[i]
add_to(alt.from_mesure, "{ % start alternative " + str(i + 1))
if alt is alts[-1]: add_to(alt.to_mesure + 1, "} % end last alternative")
else: add_to(alt.to_mesure + 1, "} % end alternative")
add_to(alts[-1].to_mesure + 1, r"} % end alternatives")
else: # No alternatives
add_to(start.to_mesure + 1, r"} % end repeat")
class PlaylistItem:
def __init__(self, playlist, from_mesure, to_mesure):
self.playlist = playlist
self.from_mesure = from_mesure
self.to_mesure = to_mesure
def __unicode__(self): return _(u"__PlaylistItem__") % (self.from_mesure, self.to_mesure)
def __eq__(self, other): return isinstance(other, PlaylistItem) and (self.from_mesure == other.from_mesure) and (self.to_mesure == other.to_mesure)
def __cmp__(self, other): return cmp(self.from_mesure, other.from_mesure)
def __hash__(self): return hash(self.from_mesure) ^ hash(self.to_mesure)
# Midi stuff :
def chunk(name, data):
return struct.pack(">4si", name, len(data)) + data
def varLength(i):
array = [i & 0x7F]
while i >= 128:
i = i >> 7
array.append((i & 0x7F) | 0x80)
array.reverse()
return struct.pack(">" + "b" * len(array), *array)
def readVarLength(file):
result = 0
while 1:
b = struct.unpack(">B", file.read(1))[0]
result = result | (b & 0x7F)
if (b & 0x80) != 0x80: break
result = result << 7
return result
END_TRACK = struct.pack(">bbb", 0xFF, 0x2F, 0x00)
|