|
0
|
1 #!/usr/bin/env python
|
|
|
2
|
|
|
3 import exceptions
|
|
|
4 import mido
|
|
|
5 import svgwrite
|
|
|
6 import sys
|
|
|
7
|
|
|
8 def test():
|
|
|
9 # http://www.orgues-de-barbarie.com/wp-content/uploads/2014/09/format-cartons.pdf
|
|
|
10 conf = { 'notefile' : 'notes', 'pitch' : 5.5 }
|
|
|
11 midi2note, note2midi = genmidi2note()
|
|
|
12 note2slot = loadnote2slot(conf['notefile'], note2midi)
|
|
|
13 midi2svg('test.midi', 'test%d.svg', conf['pitch'], midi2note, note2midi, note2slot)
|
|
|
14
|
|
|
15 # http://www.electronics.dit.ie/staff/tscarff/Music_technology/midi/midi_note_numbers_for_octaves.htm
|
|
|
16 def genmidi2note():
|
|
|
17 '''Create forward & reverse tables for midi number to note name (assuming 69 == A440)'''
|
|
|
18 names = ['C%d', 'C%d#', 'D%d', 'D%d#', 'E%d', 'F%d', 'F%d#', 'G%d', 'G%d#', 'A%d', 'A%d#', 'B%d']
|
|
|
19 midi2note = {}
|
|
|
20 note2midi = {}
|
|
|
21 for midi in range(128):
|
|
|
22 octave = midi / len(names)
|
|
|
23 index = midi % len(names)
|
|
|
24 name = names[index] % (octave)
|
|
|
25 midi2note[midi] = name
|
|
|
26 note2midi[name] = midi
|
|
|
27
|
|
|
28 return midi2note, note2midi
|
|
|
29
|
|
|
30 def loadnote2slot(fname, note2midi):
|
|
|
31 svg = svgwrite.Drawing(fname)
|
|
|
32
|
|
|
33 note2slot = {}
|
|
|
34 index = 0
|
|
|
35
|
|
|
36 for note in file(fname):
|
|
|
37 note = note.strip()
|
|
|
38 if note[0] == '#':
|
|
|
39 continue
|
|
|
40 if note not in note2midi:
|
|
|
41 raise exceptions.ValueError('Note \'%s\' not valid' % note)
|
|
|
42 note2slot[note] = index
|
|
|
43 index += 1
|
|
|
44
|
|
|
45 return note2slot
|
|
|
46
|
|
|
47 def emitnote(svg, slot, start, notelen):
|
|
1
|
48 # Let us say 185 ticks for a quaver and that is 0.5cm long
|
|
|
49 tickscale = 185.0 / 0.5
|
|
|
50 pitch = 0.55
|
|
|
51 offset = 0.60
|
|
0
|
52 x = start / tickscale
|
|
|
53 y = offset + slot * pitch
|
|
|
54 w = notelen / tickscale
|
|
1
|
55 h = pitch / 10.0
|
|
|
56 print 'x = %.3f y = %.3f w = %.3f h = %.3f' % (x, y, w, h)
|
|
|
57 svg.add(svgwrite.shapes.Rect(insert = ('%.3fcm' % (x), '%.3fcm' % (y)),
|
|
|
58 size = ('%.3fcm' % (w), '%.3fcm' % (h)),
|
|
|
59 stroke = 'red', stroke_width = '1px', fill = 'red'))
|
|
0
|
60
|
|
|
61 def midi2svg(inf, outpat, pitch, midi2note, note2midi, note2slot):
|
|
|
62 midi = mido.MidiFile(inf)
|
|
1
|
63 svg = svgwrite.Drawing(outpat % (0), size = ('20.0cm', '15.5cm'))
|
|
0
|
64 tnum = 0
|
|
|
65 for t in midi.tracks:
|
|
|
66 print "Track", tnum
|
|
|
67 tnum += 1
|
|
|
68 channels = []
|
|
|
69 for i in range(16):
|
|
|
70 channels.append({})
|
|
|
71 ctime = 0
|
|
|
72 for ev in t:
|
|
|
73 ctime += ev.time
|
|
|
74 if ev.type == 'note_on' and ev.velocity > 0:
|
|
|
75 if ev.note in channels[ev.channel]:
|
|
|
76 print "Duplicate channel on message"
|
|
|
77 else:
|
|
|
78 channels[ev.channel][ev.note] = ctime
|
|
|
79 elif ev.type == 'note_off' or (ev.type == 'note_on' and ev.velocity == 0):
|
|
|
80 if ev.note not in channels[ev.channel]:
|
|
|
81 print 'Note_off with no corresponding note_on for track %d channel %d note %d' % (tnum, ev.channel, ev.note)
|
|
|
82 else:
|
|
|
83 note = midi2note[ev.note]
|
|
|
84 if note not in note2slot:
|
|
|
85 print 'Skipping unplayable note %s' % (note)
|
|
|
86 else:
|
|
|
87 notelen = ctime - channels[ev.channel][ev.note]
|
|
|
88 slot = note2slot[note]
|
|
|
89 print 'Note %s (%d) at %d length %d' % (note, slot, ctime, notelen)
|
|
|
90 emitnote(svg, slot, ctime, notelen)
|
|
|
91 del channels[ev.channel][ev.note]
|
|
|
92 svg.save()
|
|
|
93
|
|
|
94 if __name__ == '__main__':
|
|
|
95 main()
|
