import midi
import sys
+import string
-scale_steps =[0,2,4,5,7,9,11]
+LINE_BELL = 60
+scale_steps = [0,2,4,5,7,9,11]
-def split_channels (track):
+def split_track (track):
chs = {}
for i in range(16):
chs[i] = []
for e in track:
- data = list (e[1])
- c = data[0] & 0x0f
- e = (e[0], tuple ([data[0] & 0xf0] + data[1:]))
- chs[c].append (e)
+ 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]
-
+ whatarewes = []
for v in chs.values ():
- ns = notes_on_channel(v)
- ns = unthread_notes (ns)
- map (dump_thread, ns)
-
- return chs
+ ns = notes_on_channel (v)
+ dinges = unthread_notes (ns)
+ if len (dinges):
+ whatarewes.append (dinges)
+ return whatarewes
class Note:
- def __init__(self, duration, pitch, velocity):
+ def __init__ (self, duration, pitch, velocity):
self.velocity = velocity
self.pitch = pitch
self.duration = duration
- def duration_compare(a,b):
- if a.duration < b.duration :
+ def duration_compare (a, b):
+ if a.duration < b.duration:
return -1
elif a.duration > b.duration:
return 1
else:
return 0
-
+
+ def dump (self):
+ return dump_note (self)
+
+class Time:
+ def __init__ (self, t, num, den):
+ self.duration = t
+ self.num = num
+ self.den = den
+
+ def dump (self):
+ return dump_skip (self.duration) + '\\time %d/%d ' % (self.num, self.den)
+
+class Key:
+ key_sharps = ('c', 'g', 'd', 'a', 'e', 'b', 'fis')
+ key_flats = ('BUG', 'f', 'bes', 'es', 'as', 'des', 'ges')
+
+ def __init__ (self, t, sharps, flats, minor):
+ self.duration = t
+ self.flats = flats
+ self.sharps = sharps
+ self.minor = minor
+
+ def dump (self):
+ if self.sharps and self.flats:
+ s = '\\keysignature %s ' % 'TODO'
+ elif self.sharps:
+ s = '\\notes\\key %s \major' % key_sharps[self.sharps]
+ elif self.flats:
+ s = '\\notes\\key %s \major' % key_flats[self.flats]
+ return dump_skip (self.duration) + s
+
+
+class Text:
+ def __init__ (self, text):
+ self.text = text
+ self.duration = 0
+
+ def dump (self):
+ return dump_text (self)
+
def notes_on_channel (channel):
pitches = {}
- nch= []
+ nch = []
for e in channel:
t = e[0]
except KeyError:
pass
+ elif e[1][0] == midi.META_EVENT:
+ if e[1][1] == midi.TIME_SIGNATURE:
+ (num, den, clocks4, count32) = map (ord, e[1][2])
+ nch.append ((t, Time (t, num, den)))
+ elif e[1][1] == midi.KEY_SIGNATURE:
+ (accidentals, minor) = map (ord, e[1][2])
+ sharps = 0
+ flats = 0
+ if accidentals < 127:
+ sharps = accidentals
+ else:
+ flats = 256 - accidentals
+ nch.append ((t, Key (t, sharps, flats, minor)))
+ elif e[1][1] == midi.TEXT_EVENT:
+ nch.append ((t, Text (e[1][2])))
+ else:
+ sys.stderr.write ("SKIP: %s\n" % `e`)
+ pass
else:
+ sys.stderr.write ("SKIP: %s\n" % `e`)
pass
return nch
todo = []
for e in channel:
t = e[0]
- if (t == start_busy_t and e[1].duration + t == end_busy_t) \
- or t >= end_busy_t:
+ if e[1].__class__ == Note and ((t == start_busy_t and e[1].duration + t == end_busy_t) \
+ or t >= end_busy_t):
thread.append (e)
start_busy_t = t
end_busy_t = t + e[1].duration
+ elif e[1].__class__ == Time or e[1].__class__ == Key or e[1].__class__ == Text:
+ thread.append (e)
else:
- todo.append(e)
+ todo.append (e)
threads.append (thread)
channel = todo
return a
def dump_skip (dt):
- wholes = dt / (4*384)
- dt = dt % (4*384);
- quarters = dt / 384
-
- # etc.
- if (wholes):
- print 's1*%d' % wholes
- if quarters:
- print 's4*%d' % quarters
-
-
+ return 's' + dump_duration (dt)
def dump_duration (dur):
g = gcd (dur, 384)
- sys.stdout.write ('4')
+ s = '4'
(p,q) = (dur / g, 384 / g)
if (p == 1 and q == 1) :
pass
else:
if p <> 1:
- sys.stdout.write ('*%d'% p)
+ s = s + '*%d'% p
if q <> 1:
- sys.stdout.write ('*%d'% q)
+ s = s + '*%d'% q
+ return s
-
def dump_note (note):
p = note.pitch
oct = p / 12
i = i+1
i = i-1
- str = chr (i + ord ('a'))
+ str = chr ((i + 2) % 7 + ord ('a'))
if scale_steps[i] <> step:
str = str + 'is'
- sys.stdout.write (' %s' % str);
- dump_duration (note.duration)
+ return ' %s' % str + dump_duration (note.duration)
+
+def dump (self):
+ return self.dump ()
+
+def dump_text (text):
+ return '\n % ' + text.text + '\n '
def dump_chord (ch):
+ s = ''
if len(ch) == 1:
- dump_note (ch[0])
+ s = dump (ch[0])
else:
- sys.stdout.write ("<")
- map (dump_note, ch)
- sys.stdout.write ('>')
+ s = '<' + string.join (map (dump, ch)) + '>'
+ return s
-def dump_thread (thread):
+# thread?
+def dump_channel (thread):
last_e = None
chs = []
ch = []
ch.append (e[1])
else:
if ch:
- chs.append ( (last_e[0], ch))
+ chs.append ((last_e[0], ch))
ch = [e[1]]
last_e = e
- if ch: chs.append ((last_e[0] ,ch))
+ if ch:
+ chs.append ((last_e[0], ch))
t = 0
last_t = 0
+ lines = ['']
for ch in chs:
+ if len (lines[-1]) > LINE_BELL:
+ lines.append ('')
+
t = ch[0]
if t - last_t:
- dump_skip (t-last_t)
+ lines[-1] = lines[-1] + dump_skip (t-last_t)
- dump_chord (ch[1])
+ lines[-1] = lines[-1] + dump_chord (ch[1])
+
last_t = t + ch[1][0].duration
+ return string.join (lines, '\n ') + '\n'
+
def dump_notes (channel):
on_hold = []
+ s = ''
for e in channel:
if e[0] <> last_t:
- dump_chord (on_hold)
+ s = s + dump_chord (on_hold)
on_hold = []
last_t = e[0]
on_hold.append (e)
-
-
-
+ return s
+
+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)
+ for i in range (len (channels)):
+ channel = channel_name (i)
+ s = s + '%s = \\notes {\n' % (track + channel)
+ s = s + ' ' + dump_channel (channels[i][0])
+ s = s + '}\n\n'
+
+ s = s + '%s = <\n' % track
+
+ for i in range (len (channels)):
+ channel = channel_name (i)
+ s = s + ' \\context Voice = %s \\%s\n' % (channel, track + channel)
+ s = s + '>\n\n'
+ return s
+
def convert_midi (f):
str = open (f).read ()
midi_dump = midi.parse (str)
- channels = []
-
+ tracks = []
for t in midi_dump[1]:
- channels.append (split_channels (t))
+ tracks.append (split_track (t))
+ s = ''
+ for i in range (len (tracks)):
+ s = s + dump_track (tracks[i], i)
+
+ s = s + '\n\\score {\n <\n'
+ for i in range (len (tracks)):
+ track = track_name (i)
+ s = s + ' \\context Staff=%s \\%s\n' % (track, track)
+ s = s + ' >\n}\n'
+
+ sys.stdout.write (s)
+
for f in sys.argv[1:]:
- convert_midi (f)
+ convert_midi (f)
projects / lilypond.git / commitdiff