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# SongWrite
# Copyright (C) 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
import globdef, staff
import cStringIO
_tabnotes = "abcdefghiklmnopqrstuvwxyz"
_notes = {
"C" : ( "c", "^c", "d", "^d", "e", "f", "f", "g", "^g", "a", "^a", "b"),
"G" : ( "c", "^c", "d", "^d", "e", "_f", "f", "g", "^g", "a", "^a", "b"),
"D" : ("_c", "c", "d", "^d", "e", "_f", "f", "g", "^g", "a", "^a", "b"),
"A" : ("_c", "c", "d", "^d", "e", "_f", "f", "_g", "g", "a", "^a", "b"),
"E" : ("_c", "c", "_d", "d", "e", "_f", "f", "_g", "g", "a", "^a", "b"),
"B" : ("_c", "c", "_d", "d", "e", "_f", "f", "_g", "g", "_a", "a", "b"),
"F#": ("_c", "c", "_d", "d", "_e", "e", "f", "_g", "g", "_a", "a", "b"),
"C#": ( "b", "c", "_d", "d", "_e", "e", "f", "_g", "g", "_a", "a", "_b"),
"F" : ( "c", "^c", "d", "^d", "e", "f", "^f", "g", "^g", "a", "b", "^b"),
"Bb": ( "c", "^c", "d", "e", "^e", "f", "^f", "g", "^g", "a", "b", "^b"),
"Eb": ( "c", "^c", "d", "e", "^e", "f", "^f", "g", "a", "^a", "b", "^b"),
"Ab": ( "c", "d", "^d", "e", "^e", "f", "^f", "g", "a", "^a", "b", "^b"),
"Db": ( "c", "d", "^d", "e", "^e", "f", "g", "^g", "a", "^a", "b", "^b"),
"Gb": ("^c", "d", "^d", "e", "^e", "f", "g", "^g", "a", "^a", "b", "c"),
"Cb": ("^c", "d", "^d", "e", "f", "^f", "g", "^g", "a", "^a", "b", "c"),
}
_durations = {
# Normal duration
384 : "4",
192 : "2",
96 : "1",
48 : "/",
24 : "/4",
12 : "/8",
6 : "/16",
3 : "/32",
# Doted durations
576 : "6",
288 : "3",
144 : "3/2",
72 : "3/4",
36 : "3/8",
18 : "3/16",
9 : "3/32",
# Triplets
32 : "1/3",
16 : "1/6",
8 : "1/12",
4 : "1/24",
}
def abcduration(duration, note = None):
if note and note.is_start_triplet(): return "(3" + _durations[duration]
return _durations[duration]
class TimingError(Exception): pass
class Timer:
def __init__(self, song):
self.song = song
self.mesures = song.mesures
self.time = 0
self.mesure_id = 0
def split(self, duration):
time = self.time
mesure_id = self.mesure_id
durations = []
while 1:
mesure_endtime = self.mesures[mesure_id].endtime()
if time + duration < mesure_endtime:
dur = duration
durations.append(dur)
time += duration
break
dur = mesure_endtime - time
durations.append(dur)
time = mesure_endtime
mesure_id += 1
duration -= dur
if duration == 0: break
return durations
def advance(self, duration, add_rest = 0):
print "avance de", duration, add_rest
durations = []
while 1:
mesure_endtime = self.mesures[self.mesure_id].endtime()
if self.time + duration < mesure_endtime:
dur = duration
if add_rest: self.add_rest(dur)
durations.append(dur)
self.time += duration
break
dur = mesure_endtime - self.time
if add_rest: self.add_rest(dur)
durations.append(dur)
self.time = mesure_endtime
self.mesure_id += 1
duration -= dur
self.change_mesure(self.mesures[self.mesure_id - 1], self.mesures[self.mesure_id])
if duration == 0: break
return durations
def goto(self, time):
if time < self.time: raise TimingError
self.advance(time - self.time, 1)
class AbcTimer(Timer):
def __init__(self, song, abc):
Timer.__init__(self, song)
self.abc = abc
def add_rest(self, duration):
dur = 384
while duration:
nb = duration / dur
duration %= dur
for i in range(nb): self.abc.write("z" + abcduration(dur))
dur /= 2
def start(self):
for s in self.song.playlist.symbols.get(self.mesures[0], ()):
if s.startswith(r"\repeat volta"):
self.abc.write("|:")
def end(self):
self.abc.write("|]")
def change_mesure(self, left, right):
print "change mesure"
#print left, self.song.playlist.symbols.get(left, None), right, self.song.playlist.symbols.get(right, None)
for s in self.song.playlist.symbols.get(left, ()):
if s == r"} % end repeat": self.abc.write(":")
elif s == r"} % end repeat with alternatives": self.abc.write(":")
elif s == r"} % end alternative": self.abc.write(":")
elif s == r"} % end last alternative": self.abc.write(":")
self.abc.write("|")
for s in self.song.playlist.symbols.get(right, ()):
if s.startswith(r"\repeat volta"): self.abc.write(":")
elif s.startswith(r"{ % start alternative"): self.abc.write("[" + s.split()[-1])
def abctab(s):
abc = cStringIO.StringIO()
print >> abc, "%%!abctab2ps -paper %s" % {"a3paper" : "a3", "a4paper" : "a4", "a5paper" : "a5", "letterpaper" : "letter", }[globdef.config.PAGE_FORMAT]
print >> abc, "X:1"
print >> abc, "L:1/4"
if s.title : print >> abc, "T:%s" % s.title
if s.authors : print >> abc, "C:%s" % s.authors
if s.comments: print >> abc, "N:%s" % s.comments.replace("\n", "N:\n")
if s.filename: print >> abc, "F:%s" % s.filename
for partition in s.partitions:
if hasattr(partition, "tonality"):
print >> abc, "K:%s" % partition.tonality
break
else:
print >> abc, "K:C"
nb = 0
for partition in s.partitions:
if partition.view.__class__.__name__ == "Tablature":
clef = " clef=guitartab"
tab = 6
elif partition.view.__class__.__name__ == "Staff":
clef = ""
tab = 0
else: continue
lyric = None # XXX
tonality = getattr(partition, "tonality", "C")
print >> abc, "%"
print >> abc, "V:%s name=%s%s" % (nb, partition.header, clef)
print >> abc, "K:%s" % tonality
nb += 1
timer = AbcTimer(s, abc)
timer.start()
chords = chordify(partition.notes)
for chord in chords:
timer.goto(chord.time)
if tab:
for duration in timer.split(chord.duration):
frets = [","] * tab
for note in chord.notes:
stringid = partition.view.stringid(note)
frets[stringid] = _tabnotes[note.value - partition.view.strings[stringid].basenote]
while frets and (frets[-1] == ","): frets.pop()
abc.write("[%s%s]" % ("".join(frets), abcduration(duration)))
timer.advance(duration)
else:
for duration in timer.advance(chord.duration):
for note in chord.notes:
abc.write(
"[" * ((len(chord.notes) > 1) and (note is chord.notes[0])) +
_notes[tonality][note.value % 12] +
"," * (4 - note.value / 12) +
"'" * (note.value / 12 - 4) +
abcduration(duration, note) +
"]" * ((len(chord.notes) > 1) and (note is chord.notes[-1]))
)
timer.end()
print >> open("/home/jiba/tmp/test.abc", "w"), abc.getvalue()
return abc.getvalue()
class Chord:
def __init__(self, time):
self.time = time
self.notes = []
self.duration = 1000000
def add(self, note):
self.notes.append(note)
self.duration = min(note.duration, self.duration)
def __repr__(self):
return "<Chord at %s duration %s %s>" % (self.time, self.duration, self.notes)
def chordify(notes):
chords = []
previous = None
notes = notes[:]
while notes:
chord = Chord(notes[0].time)
chords.append(chord)
while notes:
if notes[0].time == chord.time: chord.add(notes.pop(0))
else: break
if previous:
if previous.time + previous.duration > chord.time: # Overlaps !!!
previous.duration = chord.time - previous.time
previous = chord
return chords
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