Hi,
I have been hacking around a little bit with the midi2ly script.
Some time ago I reported a problem with tunes that were not in
3/4 time.
But as reaction I got a "sorry, midi2ly is not supported anymore"
So I decided to try a little Python hacking myself.
I found the problem was in format-1 MIDI files, where track 1 often
(always ?) contains Time and Tempo information, but no notes. And the
midi2ly script only writes out tracks if they contain notes. Result:
everything will get the default 4/4 time and the default 4=60 tempo.
Bad.
Then I started hacking.
Here's my ChangeLog:
- TrackA(time and tempo events, but no notes) and TrackB are combined
in one Staff. Time signature and Tempo are correctly used now.
- I have added some commandline options
-T --time NUM/DEN manually force a global time signature
-P --partial DUR specify an upbeat duration
--skip use invisible rests (s) for rests.
I have changed the default behaviour to
use visible rests (r)
-w --warranty The warranty message was broken. Fixed.
- I use the variable program_version in more places in the script.
For example \version is no longer written as "2.7.18" but uses the
actual program_version ("2.13.3") .
I have attached my version of midi2ly. Anyone who is interested may take
a look at it or just try it. There are still some serious problems (
like (long) notelengths that cross barlines ) but I think my version
already works a little better than the previous one.
I have just started learning Python, and am not very good with git.
Maybe someone more experienced can evaluate my version of the script,
maybe improve or correct it, and then take it to the git ?
--
Martin Tarenskeen
#!/usr/bin/python
#
# midi2ly.py -- LilyPond midi import script
#
# source file of the GNU LilyPond music typesetter
#
# (c) 1998--2009 Han-Wen Nienhuys <han...@xs4all.nl>
# Jan Nieuwenhuizen <jann...@gnu.org>
'''
TODO:
* test on weird and unquantised midi input (lily-devel)
* update doc and manpage and translations
* simply insert clef changes whenever too many ledger lines
[to avoid tex capacity exceeded]
* do not ever quant skips
* better lyrics handling
* [see if it is feasible to] move ly-classes to library for use in
other converters, while leaving midi specific stuff here
* split notes that cross barlines, use ties
* better handling of polyphony in one staff.
* make barcheck and barcount work even after meter changes
* split midifile format-0 files into separate tracks ??
* test and debug using more, complex example MIDI files
'''
import os
import sys
"""
This generic code used for all python scripts.
The quotes are to ensure that the source .py file can still be
run as a python script, but does not include any sys.path handling.
Otherwise, the lilypond-book calls inside the build
might modify installed .pyc files.
"""
program_version = '2.13.3'
program_name = sys.argv[0]
authors = ('Jan Nieuwenhuizen <jann...@gnu.org>',
'Han-Wen Nienhuys <han...@xs4all.nl>')
for d in ['/usr/share/lilypond/%s' % ( program_version ),
'/usr/lib/lilypond/%s' % ( program_version )]:
sys.path.insert (0, os.path.join (d, 'python'))
# dynamic relocation, for GUB binaries.
bindir = os.path.abspath (os.path.dirname (sys.argv[0]))
for p in ['share', 'lib']:
datadir = os.path.abspath (bindir + '/../%s/lilypond/current/python/' % p)
sys.path.insert (0, datadir)
"""
"""
import midi
import lilylib as ly
global _;_=ly._
################################################################
## CONSTANTS
LINE_BELL = 60
scale_steps = [0, 2, 4, 5, 7, 9, 11]
global_options = None
clocks_per_1 = 1536
clocks_per_4 = 0
time = 0
reference_note = 0
start_quant_clocks = 0
duration_quant_clocks = 0
allowed_tuplet_clocks = []
################################################################
errorport = sys.stderr
def identify ():
sys.stdout.write ('%s (GNU LilyPond) %s\n' % (program_name,
program_version))
def warranty ():
identify ()
ly.encoded_write (sys.stdout, '''
%s
%s
%s
%s
''' % ( _ ('Copyright (c) %s by') % '2001--2009',
'\n '.join (authors),
_ ('Distributed under terms of the GNU General Public License.'),
_ ('It comes with NO WARRANTY.')))
def progress (s):
ly.encoded_write (errorport, s + '\n')
def warning (s):
progress (_ ("warning: ") + s)
def error (s):
progress (_ ("error: ") + s)
raise Exception (_ ("Exiting... "))
def system (cmd, ignore_error = 0):
return ly.system (cmd, ignore_error=ignore_error)
def strip_extension (f, ext):
(p, e) = os.path.splitext (f)
if e == ext:
e = ''
return p + e
class Duration:
allowed_durs = (1, 2, 4, 8, 16, 32, 64, 128)
def __init__ (self, clocks):
self.clocks = clocks
if clocks <= 0:
self.clocks = duration_quant_clocks
(self.dur, self.num, self.den) = self.dur_num_den (clocks)
def dur_num_den (self, clocks):
for i in range (len (allowed_tuplet_clocks)):
if clocks == allowed_tuplet_clocks[i]:
return global_options.allowed_tuplets[i]
dur = 0; num = 1; den = 1;
g = gcd (clocks, clocks_per_1)
if g:
(dur, num) = (clocks_per_1 / g, clocks / g)
if not dur in self.allowed_durs:
dur = 4; num = clocks; den = clocks_per_4
return (dur, num, den)
def dump (self):
if self.den == 1:
if self.num == 1:
s = '%d' % self.dur
elif self.num == 3 and self.dur != 1:
s = '%d.' % (self.dur / 2)
else:
s = '%d*%d' % (self.dur, self.num)
else:
s = '%d*%d/%d' % (self.dur, self.num, self.den)
global reference_note
reference_note.duration = self
return s
def compare (self, other):
return self.clocks - other.clocks
def sign (x):
if x >= 0:
return 1
else:
return -1
class Note:
names = (0, 0, 1, 1, 2, 3, 3, 4, 4, 5, 5, 6)
alterations = (0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0)
alteration_names = ('eses', 'es', '', 'is' , 'isis')
def __init__ (self, clocks, pitch, velocity):
self.pitch = pitch
self.velocity = velocity
# hmm
self.clocks = clocks
self.duration = Duration (clocks)
(self.octave, self.notename, self.alteration) = self.o_n_a ()
def o_n_a (self):
# major scale: do-do
# minor scale: la-la (= + 5) '''
n = self.names[(self.pitch) % 12]
a = self.alterations[(self.pitch) % 12]
if a and global_options.key.flats:
a = - self.alterations[(self.pitch) % 12]
n = (n - a) % 7
# By tradition, all scales now consist of a sequence
# of 7 notes each with a distinct name, from amongst
# a b c d e f g. But, minor scales have a wide
# second interval at the top - the 'leading note' is
# sharped. (Why? it just works that way! Anything
# else doesn't sound as good and isn't as flexible at
# saying things. In medieval times, scales only had 6
# notes to avoid this problem - the hexachords.)
# So, the d minor scale is d e f g a b-flat c-sharp d
# - using d-flat for the leading note would skip the
# name c and duplicate the name d. Why isn't c-sharp
# put in the key signature? Tradition. (It's also
# supposedly based on the Pythagorean theory of the
# cycle of fifths, but that really only applies to
# major scales...) Anyway, g minor is g a b-flat c d
# e-flat f-sharp g, and all the other flat minor keys
# end up with a natural leading note. And there you
# have it.
# John Sankey <bf...@freenet.carleton.ca>
#
# Let's also do a-minor: a b c d e f gis a
#
# --jcn
o = self.pitch / 12 - 4
key = global_options.key
if key.minor:
# as -> gis
if (key.sharps == 0 and key.flats == 0
and n == 5 and a == -1):
n = 4; a = 1
# des -> cis
elif key.flats == 1 and n == 1 and a == -1:
n = 0; a = 1
# ges -> fis
elif key.flats == 2 and n == 4 and a == -1:
n = 3; a = 1
# g -> fisis
elif key.sharps == 5 and n == 4 and a == 0:
n = 3; a = 2
# d -> cisis
elif key.sharps == 6 and n == 1 and a == 0:
n = 0; a = 2
# a -> gisis
elif key.sharps == 7 and n == 5 and a == 0:
n = 4; a = 2
# b -> ces
if key.flats >= 6 and n == 6 and a == 0:
n = 0; a = -1; o = o + 1
# e -> fes
if key.flats >= 7 and n == 2 and a == 0:
n = 3; a = -1
# f -> eis
if key.sharps >= 3 and n == 3 and a == 0:
n = 2; a = 1
# c -> bis
if key.sharps >= 4 and n == 0 and a == 0:
n = 6; a = 1; o = o - 1
return (o, n, a)
def __repr__ (self):
s = chr ((self.notename + 2) % 7 + ord ('a'))
return 'Note(%s %s)' % (s, self.duration.dump())
def dump (self, dump_dur = 1):
global reference_note
s = chr ((self.notename + 2) % 7 + ord ('a'))
s = s + self.alteration_names[self.alteration + 2]
if global_options.absolute_pitches:
commas = self.octave
else:
delta = self.pitch - reference_note.pitch
commas = sign (delta) * (abs (delta) / 12)
if ((sign (delta) \
* (self.notename - reference_note.notename) + 7) \
% 7 >= 4) \
or ((self.notename == reference_note.notename) \
and (abs (delta) > 4) and (abs (delta) < 12)):
commas = commas + sign (delta)
if commas > 0:
s = s + "'" * commas
elif commas < 0:
s = s + "," * -commas
## FIXME: compile fix --jcn
if dump_dur and (global_options.explicit_durations \
or self.duration.compare (reference_note.duration)):
s = s + self.duration.dump ()
reference_note = self
# TODO: move space
return s + ' '
class Time:
def __init__ (self, num, den):
self.clocks = 0
self.num = num
self.den = den
def bar_clocks (self):
return clocks_per_1 * self.num / self.den
def __repr__ (self):
return 'Time(%d/%d)' % (self.num, self.den)
def dump (self):
global time
time = self
return '\n ' + '\\time %d/%d ' % (self.num, self.den) + '\n '
class Tempo:
def __init__ (self, seconds_per_1):
self.clocks = 0
self.seconds_per_1 = seconds_per_1
def __repr__ (self):
return 'Tempo(%d)' % self.bpm ()
def bpm (self):
return 4 * 60 / self.seconds_per_1
def dump (self):
return '\n ' + '\\tempo 4 = %d ' % (self.bpm()) + '\n '
class Clef:
clefs = ('"bass_8"', 'bass', 'violin', '"violin^8"')
def __init__ (self, type):
self.type = type
def __repr__ (self):
return 'Clef(%s)' % self.clefs[self.type]
def dump (self):
return '\n \\clef %s\n ' % self.clefs[self.type]
class Key:
key_sharps = ('c', 'g', 'd', 'a', 'e', 'b', 'fis')
key_flats = ('BUG', 'f', 'bes', 'es', 'as', 'des', 'ges')
def __init__ (self, sharps, flats, minor):
self.clocks = 0
self.flats = flats
self.sharps = sharps
self.minor = minor
def dump (self):
global_options.key = self
s = ''
if self.sharps and self.flats:
pass
else:
if self.flats:
k = (ord ('cfbeadg'[self.flats % 7]) - ord ('a') - 2 -2 *
self.minor + 7) % 7
else:
k = (ord ('cgdaebf'[self.sharps % 7]) - ord ('a') - 2 -2 *
self.minor + 7) % 7
if not self.minor:
name = chr ((k + 2) % 7 + ord ('a'))
else:
name = chr ((k + 2) % 7 + ord ('a'))
# fis cis gis dis ais eis bis
sharps = (2, 4, 6, 1, 3, 5, 7)
# bes es as des ges ces fes
flats = (6, 4, 2, 7, 5, 3, 1)
a = 0
if self.flats:
if flats[k] <= self.flats:
a = -1
else:
if sharps[k] <= self.sharps:
a = 1
if a:
name = name + Note.alteration_names[a + 2]
s = '\\key ' + name
if self.minor:
s = s + ' \\minor'
else:
s = s + ' \\major'
return '\n\n ' + s + '\n '
class Text:
text_types = (
'SEQUENCE_NUMBER',
'TEXT_EVENT',
'COPYRIGHT_NOTICE',
'SEQUENCE_TRACK_NAME',
'INSTRUMENT_NAME',
'LYRIC',
'MARKER',
'CUE_POINT',)
def __init__ (self, type, text):
self.clocks = 0
self.type = type
self.text = text
def dump (self):
# urg, we should be sure that we're in a lyrics staff
if self.type == midi.LYRIC:
s = '"%s"' % self.text
d = Duration (self.clocks)
if global_options.explicit_durations \
or d.compare (reference_note.duration):
s = s + Duration (self.clocks).dump ()
s = s + ' '
else:
s = '\n % [' + self.text_types[self.type] + '] ' + self.text + '\n
'
return s
def __repr__ (self):
return 'Text(%d=%s)' % (self.type, self.text)
def split_track (track):
chs = {}
for i in range(16):
chs[i] = []
for e in track:
data = list (e[1])
if data[0] > 0x7f and data[0] < 0xf0:
c = data[0] & 0x0f
e = (e[0], tuple ([data[0] & 0xf0] + data[1:]))
chs[c].append (e)
else:
chs[0].append (e)
for i in range (16):
if chs[i] == []:
del chs[i]
threads = []
for v in chs.values ():
events = events_on_channel (v)
thread = unthread_notes (events)
if len (thread):
threads.append (thread)
return threads
def quantise_clocks (clocks, quant):
q = int (clocks / quant) * quant
if q != clocks:
for tquant in allowed_tuplet_clocks:
if int (clocks / tquant) * tquant == clocks:
return clocks
if 2 * (clocks - q) > quant:
q = q + quant
return q
def end_note (pitches, notes, t, e):
try:
(lt, vel) = pitches[e]
del pitches[e]
i = len (notes) - 1
while i > 0:
if notes[i][0] > lt:
i = i -1
else:
break
d = t - lt
if duration_quant_clocks:
d = quantise_clocks (d, duration_quant_clocks)
if not d:
d = duration_quant_clocks
notes.insert (i + 1,
(lt, Note (d, e, vel)))
except KeyError:
pass
def events_on_channel (channel):
pitches = {}
notes = []
events = []
last_lyric = 0
last_time = 0
for e in channel:
t = e[0]
if start_quant_clocks:
t = quantise_clocks (t, start_quant_clocks)
if e[1][0] == midi.NOTE_OFF \
or (e[1][0] == midi.NOTE_ON and e[1][2] == 0):
end_note (pitches, notes, t, e[1][1])
elif e[1][0] == midi.NOTE_ON:
if not pitches.has_key (e[1][1]):
pitches[e[1][1]] = (t, e[1][2])
# all include ALL_NOTES_OFF
elif e[1][0] >= midi.ALL_SOUND_OFF \
and e[1][0] <= midi.POLY_MODE_ON:
for i in pitches:
end_note (pitches, notes, t, i)
elif e[1][0] == midi.META_EVENT:
if e[1][1] == midi.END_OF_TRACK:
for i in pitches:
end_note (pitches, notes, t, i)
break
elif e[1][1] == midi.SET_TEMPO:
(u0, u1, u2) = map (ord, e[1][2])
us_per_4 = u2 + 256 * (u1 + 256 * u0)
seconds_per_1 = us_per_4 * 4 / 1e6
events.append ((t, Tempo (seconds_per_1)))
elif e[1][1] == midi.TIME_SIGNATURE:
global num, den
(num, dur, clocks4, count32) = map (ord, e[1][2])
den = 2 ** dur
if global_options.mytime:
num =
int(global_options.mytime[:global_options.mytime.index('/')])
den =
int(global_options.mytime[global_options.mytime.index('/')+1:])
events.append ((t, Time (num, den)))
elif e[1][1] == midi.KEY_SIGNATURE:
(alterations, minor) = map (ord, e[1][2])
sharps = 0
flats = 0
if alterations < 127:
sharps = alterations
else:
flats = 256 - alterations
k = Key (sharps, flats, minor)
events.append ((t, k))
# ugh, must set key while parsing
# because Note init uses key
# Better do Note.calc () at dump time?
global_options.key = k
elif e[1][1] == midi.LYRIC \
or (global_options.text_lyrics and e[1][1] == midi.TEXT_EVENT):
if last_lyric:
last_lyric.clocks = t - last_time
events.append ((last_time, last_lyric))
last_time = t
last_lyric = Text (midi.LYRIC, e[1][2])
elif e[1][1] >= midi.SEQUENCE_NUMBER \
and e[1][1] <= midi.CUE_POINT:
events.append ((t, Text (e[1][1], e[1][2])))
else:
if global_options.verbose:
sys.stderr.write ("SKIP: %s\n" % `e`)
pass
else:
if global_options.verbose:
sys.stderr.write ("SKIP: %s\n" % `e`)
pass
if last_lyric:
# last_lyric.clocks = t - last_time
# hmm
last_lyric.clocks = clocks_per_4
events.append ((last_time, last_lyric))
last_lyric = 0
i = 0
while len (notes):
if i < len (events) and notes[0][0] >= events[i][0]:
i = i + 1
else:
events.insert (i, notes[0])
del notes[0]
return events
def unthread_notes (channel):
threads = []
while channel:
thread = []
end_busy_t = 0
start_busy_t = 0
todo = []
for e in channel:
t = e[0]
if e[1].__class__ == Note \
and ((t == start_busy_t \
and e[1].clocks + t == end_busy_t) \
or t >= end_busy_t):
thread.append (e)
start_busy_t = t
end_busy_t = t + e[1].clocks
elif e[1].__class__ == Time \
or e[1].__class__ == Key \
or e[1].__class__ == Text \
or e[1].__class__ == Tempo:
thread.append (e)
else:
todo.append (e)
threads.append (thread)
channel = todo
return threads
def gcd (a,b):
if b == 0:
return a
c = a
while c:
c = a % b
a = b
b = c
return a
def dump_skip (skip, clocks):
return skip + Duration (clocks).dump () + ' '
def dump (d):
return d.dump ()
def dump_chord (ch):
s = ''
notes = []
for i in ch:
if i.__class__ == Note:
notes.append (i)
else:
s = s + i.dump ()
if len (notes) == 1:
s = s + dump (notes[0])
elif len (notes) > 1:
global reference_note
s = s + '<'
s = s + notes[0].dump (dump_dur = 0)
r = reference_note
for i in notes[1:]:
s = s + i.dump (dump_dur = 0 )
s = s + '>'
s = s + notes[0].duration.dump() + ' '
reference_note = r
return s
def dump_bar_line (last_bar_t, t, bar_count):
s = ''
bar_t = time.bar_clocks ()
if t - last_bar_t >= bar_t:
bar_count = bar_count + (t - last_bar_t) / bar_t
if t - last_bar_t == bar_t:
s = '|\n %% %d\n ' % bar_count
last_bar_t = t
else:
# urg, this will barf at meter changes
last_bar_t = last_bar_t + (t - last_bar_t) / bar_t * bar_t
return (s, last_bar_t, bar_count)
def dump_channel (thread, skip):
global reference_note, time
global_options.key = Key (0, 0, 0)
time = Time (num, den)
# urg LilyPond doesn't start at c4, but
# remembers from previous tracks!
# reference_note = Note (clocks_per_4, 4*12, 0)
reference_note = Note (0, 4*12, 0)
last_e = None
chs = []
ch = []
for e in thread:
if last_e and last_e[0] == e[0]:
ch.append (e[1])
else:
if ch:
chs.append ((last_e[0], ch))
ch = [e[1]]
last_e = e
if ch:
chs.append ((last_e[0], ch))
t = 0
last_t = 0
last_bar_t = 0
bar_count = 1
#lines = ['\\mytime ']
#else:
lines = ['']
if global_options.mytime or global_options.mypartial:
lines.append('\\mytime ')
for ch in chs:
t = ch[0]
i = lines[-1].rfind ('\n') + 1
if len (lines[-1][i:]) > LINE_BELL:
lines.append ('')
if t - last_t > 0:
lines[-1] = lines[-1] + dump_skip (skip, t-last_t)
elif t - last_t < 0:
errorport.write ('BUG: time skew')
(s, last_bar_t, bar_count) = dump_bar_line (last_bar_t,
t, bar_count)
lines[-1] = lines[-1] + s
lines[-1] = lines[-1] + dump_chord (ch[1])
clocks = 0
for i in ch[1]:
if i.clocks > clocks:
clocks = i.clocks
last_t = t + clocks
(s, last_bar_t, bar_count) = dump_bar_line (last_bar_t,
last_t, bar_count)
lines[-1] = lines[-1] + s
return '\n '.join (lines) + '\n'
def track_name (i):
return 'track%c' % (i + ord ('A'))
def channel_name (i):
return 'channel%c' % (i + ord ('A'))
def dump_track (channels, n):
s = '\n'
track = track_name (n)
clef = guess_clef (channels)
for i in range (len (channels)):
channel = channel_name (i)
item = thread_first_item (channels[i])
if item and item.__class__ == Note:
if global_options.skip:
skip = 's'
else:
skip = 'r'
s = s + '%s = ' % (track + channel)
if not global_options.absolute_pitches:
s = s + '\\relative c '
elif item and item.__class__ == Text:
skip = '" "'
s = s + '%s = \\lyricmode ' % (track + channel)
else:
skip = '\\skip '
s = s + '%s = ' % (track + channel)
s = s + '{\n'
s = s + ' ' + dump_channel (channels[i][0], skip)
s = s + '}\n\n'
s = s + '%s = <<\n' % track
if clef.type != 2:
s = s + clef.dump ()
for i in range (len (channels)):
channel = channel_name (i)
item = thread_first_item (channels[i])
if item and item.__class__ == Text:
s = s + ' \\context Lyrics = %s \\%s\n' % (channel,
track + channel)
else:
s = s + ' \\context Voice = %s \\%s\n' % (channel,
track + channel)
s = s + '>>\n\n'
return s
def thread_first_item (thread):
for chord in thread:
for event in chord:
if (event[1].__class__ == Note
or (event[1].__class__ == Text
and event[1].type == midi.LYRIC)):
return event[1]
return None
def track_first_item (track):
for thread in track:
first = thread_first_item (thread)
if first:
return first
return None
def guess_clef (track):
i = 0
p = 0
for thread in track:
for chord in thread:
for event in chord:
if event[1].__class__ == Note:
i = i + 1
p = p + event[1].pitch
if i and p / i <= 3*12:
return Clef (0)
elif i and p / i <= 5*12:
return Clef (1)
elif i and p / i >= 7*12:
return Clef (3)
else:
return Clef (2)
def convert_midi (in_file, out_file):
global clocks_per_1, clocks_per_4, key
global start_quant_clocks
global duration_quant_clocks
global allowed_tuplet_clocks
str = open (in_file).read ()
midi_dump = midi.parse (str)
clocks_per_1 = midi_dump[0][1]
clocks_per_4 = clocks_per_1 / 4
if global_options.start_quant:
start_quant_clocks = clocks_per_1 / global_options.start_quant
if global_options.duration_quant:
duration_quant_clocks = clocks_per_1 / global_options.duration_quant
allowed_tuplet_clocks = []
for (dur, num, den) in global_options.allowed_tuplets:
allowed_tuplet_clocks.append (clocks_per_1 / den)
tracks = []
for t in midi_dump[1]:
global_options.key = Key (0, 0, 0)
tracks.append (split_track (t))
tag = '%% Lily was here -- automatically converted by %s from %s' % (
program_name, in_file)
s = ''
s = tag + '\n\\version "%s"\n\n' % ( program_version )
s = s + '\\header {\n'
s = s + ' title = "%s"\n' % ( in_file[:in_file.index('.')] )
s = s + ' tagline = "%s"\n' % ( tag )
s = s + '}\n\n'
if global_options.mytime or global_options.mypartial:
s = s + 'mytime = {\n'
if global_options.mytime:
s = s + ' \\time ' + global_options.mytime + '\n'
if global_options.mypartial:
s = s + ' \\partial ' + global_options.mypartial + '\n'
s = s + '}\n'
for i in range (len (tracks)):
s = s + dump_track (tracks[i], i)
s = s + '\n\\score {\n <<\n'
i = 0
A = 0
for t in tracks:
track = track_name (i)
item = track_first_item (t)
if item and item.__class__ == Note:
if not ( A == 1 and track == 'trackB' ) :
s = s + ' \\context Staff=%s \\%s\n' % (track, track)
elif track == 'trackA' and not global_options.mytime:
s = s + ' \\context Staff=trackA << \\trackA \\\\ \\trackB >>\n'
A = 1
elif item and item.__class__ == Text:
s = s + ' \\context Lyrics=%s \\%s\n' % (track, track)
i += 1
s = s + ' >>\n}\n'
progress (_ ("%s output to `%s'...") % ('LY', out_file))
if out_file == '-':
handle = sys.stdout
else:
handle = open (out_file, 'w')
handle.write (s)
handle.close ()
def get_option_parser ():
p = ly.get_option_parser (usage=_ ("%s [OPTION]... FILE") % 'midi2ly',
description=_ ("Convert %s to LilyPond input.\n") % 'MIDI',
add_help_option=False)
p.add_option ('-a', '--absolute-pitches',
action='store_true',
help=_ ("print absolute pitches"))
p.add_option ('-d', '--duration-quant',
metavar= _("DUR"),
help=_ ("quantise note durations on DUR"),
default='16')
p.add_option ('-e', '--explicit-durations',
action='store_true',
help=_ ("print explicit durations"))
p.add_option("-h", "--help",
action="help",
help=_ ("show this help and exit"))
p.add_option('-k', '--key', help=_ ("set key: ALT=+sharps|-flats; MINOR=1"),
metavar=_ ("ALT[:MINOR]"),
default='0'),
p.add_option ('-o', '--output', help=_ ("write output to FILE"),
metavar=_("FILE"),
action='store')
p.add_option ('-P', '--partial',
metavar =_ ("DUR"),
action = "store",
dest = "mypartial",
help =_ ("insert global \"\\partial DUR\" upbeat"))
p.add_option('-s', '--start-quant',
help= _ ("quantise note starts on DUR"),
default = '16',
metavar= _ ("DUR"))
p.add_option ('--skip',
action = "store_true",
help =_ ("use s instead of r for rests"))
p.add_option('-t', '--allow-tuplet',
metavar=_ ("DUR*NUM/DEN"),
action = "append",
dest="allowed_tuplets",
help= _ ("allow tuplet durations DUR*NUM/DEN"),
default=[])
p.add_option ('-T', '--time',
metavar =_ ("NUM/DEN"),
action = "store",
dest = "mytime",
help =_ ("insert global \"\\time NUM/DEN\" signature"))
p.add_option ('-V', '--verbose', help=_ ("be verbose"),
action='store_true')
p.version = "midi2ly (LilyPond) %s" % ( program_version )
p.add_option("--version",
action="version",
help=_ ("show version number and exit"))
p.add_option ('-w', '--warranty', help=_ ("show warranty and copyright"),
action='store_true')
p.add_option ('-x', '--text-lyrics', help=_ ("treat every text as a lyric"),
action='store_true')
p.add_option_group (ly.display_encode (_ ("Examples")),
description = r'''
$ midi2ly --key=-2:1 --duration-quant=32 --allow-tuplet=4*2/3
--allow-tuplet=2*4/3 foo.midi
''')
p.add_option_group ('',
description=(
_ ('Report bugs via %s')
% 'http://post.gmane.org/post.php'
'?group=gmane.comp.gnu.lilypond.bugs') + '\n')
return p
def do_options ():
opt_parser = get_option_parser()
(options, args) = opt_parser.parse_args ()
if options.warranty:
warranty ()
sys.exit (0)
if not args or args[0] == '-':
opt_parser.print_help ()
ly.stderr_write ('\n%s: %s %s\n' % (program_name, _ ("error: "),
_ ("no files specified on command line.")))
sys.exit (2)
if options.duration_quant:
options.duration_quant = int (options.duration_quant)
if 1:
(alterations, minor) = map (int, (options.key + ':0').split (':'))[0:2]
sharps = 0
flats = 0
if alterations >= 0:
sharps = alterations
else:
flats = - alterations
options.key = Key (sharps, flats, minor)
if options.start_quant:
options.start_quant = int (options.start_quant)
options.allowed_tuplets = [map (int, a.replace ('/','*').split ('*'))
for a in options.allowed_tuplets]
global global_options
global_options = options
return args
def main():
files = do_options()
for f in files:
g = f
g = strip_extension (g, '.midi')
g = strip_extension (g, '.mid')
g = strip_extension (g, '.MID')
(outdir, outbase) = ('','')
if not global_options.output:
outdir = '.'
outbase = os.path.basename (g)
o = os.path.join (outdir, outbase + '-midi.ly')
elif global_options.output[-1] == os.sep:
outdir = global_options.output
outbase = os.path.basename (g)
os.path.join (outdir, outbase + '-gen.ly')
else:
o = global_options.output
(outdir, outbase) = os.path.split (o)
if outdir != '.' and outdir != '':
try:
os.mkdir (outdir, 0777)
except OSError:
pass
convert_midi (f, o)
if __name__ == '__main__':
main()
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