Mercurial > ~darius > hgwebdir.cgi > musiccutter
annotate musiccutter.py @ 7:31db42ce72b8
Rework to be class-y
Need to handle page bridging notes.
| author | Daniel O'Connor <darius@dons.net.au> |
|---|---|
| date | Sat, 02 Apr 2016 23:06:48 +1030 |
| parents | af683606184e |
| children | f07a997e9f79 |
| rev | line source |
|---|---|
| 0 | 1 #!/usr/bin/env python |
| 2 | |
| 3 import exceptions | |
|
4
9f4fa5f231e6
Rework to use mido iterator and paginate.
Daniel O'Connor <darius@dons.net.au>
parents:
3
diff
changeset
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4 import itertools |
| 7 | 5 import math |
| 0 | 6 import mido |
| 7 import svgwrite | |
| 8 import sys | |
| 9 | |
|
3
49a33c431b45
Accept filename for test function
Daniel O'Connor <darius@dons.net.au>
parents:
2
diff
changeset
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10 def test(filename = None): |
|
49a33c431b45
Accept filename for test function
Daniel O'Connor <darius@dons.net.au>
parents:
2
diff
changeset
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11 if filename == None: |
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49a33c431b45
Accept filename for test function
Daniel O'Connor <darius@dons.net.au>
parents:
2
diff
changeset
|
12 filename = 'test.midi' |
| 7 | 13 # Card layout from http://www.orgues-de-barbarie.com/wp-content/uploads/2014/09/format-cartons.pdf |
| 14 m = Midi2SVG('notes', 20, 15.5, 0.55, 0.6, 1.0) | |
| 15 m.processMidi(filename, 'test%02d.svg') | |
| 0 | 16 |
| 7 | 17 class Midi2SVG(object): |
| 18 def __init__(self, notefile, pagewidth, pageheight, pitch, offset, timescale): | |
| 19 self.midi2note, self.note2midi = Midi2SVG.genmidi2note() | |
| 20 self.note2slot = Midi2SVG.loadnote2slot(notefile, self.note2midi) | |
| 21 self.pagewidth = pagewidth | |
| 22 self.pageheight = pageheight | |
| 23 self.pitch = pitch | |
| 24 self.offset = offset | |
| 25 self.timescale = timescale | |
| 0 | 26 |
| 7 | 27 def processMidi(self, midifile, outpat): |
| 28 playablecount = 0 | |
| 29 unplayablecount = 0 | |
| 30 midi = mido.MidiFile(midifile) | |
| 31 ctime = 0 | |
| 32 channels = [] | |
| 33 for i in range(16): | |
| 34 channels.append({}) | |
| 0 | 35 |
| 7 | 36 npages = int(math.ceil(midi.length / self.timescale / self.pagewidth)) |
| 37 print 'npages', npages | |
| 38 svgs = [] | |
| 39 for i in range(npages): | |
| 40 svg = svgwrite.Drawing(outpat % i, profile = 'full', size = ('%.3fcm' % (self.pagewidth), '%.3fcm' % (self.pageheight))) | |
| 41 svgs.append(svg) | |
| 0 | 42 |
| 7 | 43 for ev in midi: |
| 44 ctime += ev.time | |
| 45 if ev.type == 'note_on' or ev.type == 'note_off': | |
| 46 note = self.midi2note[ev.note] | |
| 47 print ctime, ev | |
| 48 if ev.type == 'note_on' and ev.velocity > 0: | |
| 49 if ev.note in channels[ev.channel]: | |
| 50 print 'Duplicate note_on message %d (%s)' % (ev.note, note) | |
| 0 | 51 else: |
| 7 | 52 channels[ev.channel][ev.note] = ctime |
| 53 elif ev.type == 'note_off' or (ev.type == 'note_on' and ev.velocity == 0): | |
| 54 if ev.note not in channels[ev.channel]: | |
| 55 print 'note_off with no corresponding note_on for channel %d note %d' % (ev.channel, ev.note) | |
| 0 | 56 else: |
| 7 | 57 if note not in self.note2slot: |
| 58 print 'Skipping unplayable note %s' % (note) | |
| 59 unplayablecount += 1 | |
| 60 else: | |
| 61 start = channels[ev.channel][ev.note] | |
| 62 notelen = ctime - start | |
| 63 slot = self.note2slot[note] | |
| 64 print 'Note %s (%d) at %.2f length %.2f' % (note, slot, start, notelen) | |
| 65 self.emitnote(svgs, slot, start, notelen) | |
| 66 playablecount += 1 | |
| 67 del channels[ev.channel][ev.note] | |
| 68 elif ev.type == 'end_of_track': | |
| 69 print 'EOT, not flushing, check for missed notes' | |
| 70 for chan in channels: | |
| 71 for ev in chan: | |
| 72 print ev | |
| 73 | |
| 74 print 'Playable count:', playablecount | |
| 75 print 'Unplayable count:', unplayablecount | |
| 76 | |
| 77 for svg in svgs: | |
| 78 svg.save() | |
| 79 | |
| 80 # http://www.electronics.dit.ie/staff/tscarff/Music_technology/midi/midi_note_numbers_for_octaves.htm | |
| 81 @staticmethod | |
| 82 def genmidi2note(): | |
| 83 '''Create forward & reverse tables for midi number to note name (assuming 69 == A440)''' | |
| 84 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'] | |
| 85 midi2note = {} | |
| 86 note2midi = {} | |
| 87 for midi in range(128): | |
| 88 octave = midi / len(names) | |
| 89 index = midi % len(names) | |
| 90 name = names[index] % (octave) | |
| 91 midi2note[midi] = name | |
| 92 note2midi[name] = midi | |
|
4
9f4fa5f231e6
Rework to use mido iterator and paginate.
Daniel O'Connor <darius@dons.net.au>
parents:
3
diff
changeset
|
93 |
| 7 | 94 return midi2note, note2midi |
| 95 | |
| 96 @staticmethod | |
| 97 def loadnote2slot(fname, note2midi): | |
| 98 note2slot = {} | |
| 99 index = 0 | |
| 100 | |
| 101 for note in file(fname): | |
| 102 note = note.strip() | |
| 103 if note[0] == '#': | |
| 104 continue | |
| 105 if note not in note2midi: | |
| 106 raise exceptions.ValueError('Note \'%s\' not valid' % note) | |
| 107 note2slot[note] = index | |
| 108 index += 1 | |
| 109 | |
| 110 return note2slot | |
|
4
9f4fa5f231e6
Rework to use mido iterator and paginate.
Daniel O'Connor <darius@dons.net.au>
parents:
3
diff
changeset
|
111 |
| 7 | 112 def emitnote(self, svgs, slot, start, notelen): |
| 113 startx = start / self.timescale | |
| 114 startpageidx = int(startx / self.pagewidth) | |
| 115 endx = (start + notelen) / self.timescale | |
| 116 endpageidx = int(endx / self.pagewidth) | |
| 117 startx = startx % self.pagewidth | |
| 118 y = self.pageheight - (self.offset + slot * self.pitch) | |
| 119 w = notelen / self.timescale | |
| 120 h = self.pitch | |
| 121 | |
| 122 if startpageidx != endpageidx: | |
| 123 print 'page crossed from %d to %d' % (startpageidx, endpageidx) | |
| 124 print 'page = %d x = %.3f y = %.3f w = %.3f h = %.3f' % (startpageidx, startx, y, w, h) | |
| 125 Midi2SVG._emitnote(svgs[startpageidx], startx, y, w, h) | |
| 126 | |
| 127 @staticmethod | |
| 128 def _emitnote(svg, x, y, w, h): | |
| 129 svg.add(svgwrite.shapes.Rect(insert = ('%.3fcm' % (x), '%.3fcm' % (y)), | |
| 130 size = ('%.3fcm' % (w), '%.3fcm' % (h)), | |
| 131 stroke = 'red', stroke_width = '1px', fill = 'red')) | |
| 0 | 132 |
| 133 if __name__ == '__main__': | |
| 134 main() |