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comparison musiccutter.py @ 5:af683606184e

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Paginate with a view port, a lot slower and wastes space but handling notes between pages is trivial.
author Daniel O'Connor <darius@dons.net.au>
date Tue, 08 Mar 2016 00:43:30 +1030
parents 9f4fa5f231e6
children 31db42ce72b8
comparison
equal deleted inserted replaced
4:9f4fa5f231e6 5:af683606184e
47 note2slot[note] = index 47 note2slot[note] = index
48 index += 1 48 index += 1
49 49
50 return note2slot 50 return note2slot
51 51
52 def emitnote(pages, outpat, slot, start, notelen, pagewidth, pageheight, pitch, offset, timescale): 52 def emitnote(svg, slot, start, notelen, pagewidth, pageheight, pitch, offset, timescale):
53 x = start / timescale 53 x = start / timescale
54 pageidx = int(x / pagewidth)
55 x = x % pagewidth
56 y = pageheight - (offset + slot * pitch) 54 y = pageheight - (offset + slot * pitch)
57 w = notelen / timescale 55 w = notelen / timescale
58 h = pitch 56 h = pitch
59 print 'pageidx = %d x = %.3f y = %.3f w = %.3f h = %.3f' % (pageidx, x, y, w, h) 57 print 'x = %.3f y = %.3f w = %.3f h = %.3f' % (x, y, w, h)
60 if len(pages) <= pageidx:
61 pages.extend(itertools.repeat(None, len(pages) - pageidx + 1))
62 if not pages[pageidx]:
63 svg = svgwrite.Drawing(outpat % (pageidx), size = ('%.3fcm' % (pagewidth), '%.3fcm' % (pageheight)))
64 pages[pageidx] = svg
65 else:
66 svg = pages[pageidx]
67 svg.add(svgwrite.shapes.Rect(insert = ('%.3fcm' % (x), '%.3fcm' % (y)), 58 svg.add(svgwrite.shapes.Rect(insert = ('%.3fcm' % (x), '%.3fcm' % (y)),
68 size = ('%.3fcm' % (w), '%.3fcm' % (h)), 59 size = ('%.3fcm' % (w), '%.3fcm' % (h)),
69 stroke = 'red', stroke_width = '1px', fill = 'red')) 60 stroke = 'red', stroke_width = '1px', fill = 'red'))
70 61
71 def midi2svg(inf, outpat, midi2note, note2midi, note2slot, pagewidth, pageheight, pitch, offset, timescale): 62 def midi2svg(inf, outpat, midi2note, note2midi, note2slot, pagewidth, pageheight, pitch, offset, timescale):
72 playablecount = 0 63 playablecount = 0
73 unplayablecount = 0 64 unplayablecount = 0
74 midi = mido.MidiFile(inf) 65 midi = mido.MidiFile(inf)
75 ctime = 0 66 ctime = 0
76 channels = [] 67 channels = []
68 svg = svgwrite.Drawing(outpat % (0), size = ('%.3fcm' % (pagewidth), '%.3fcm' % (pageheight)))
77 for i in range(16): 69 for i in range(16):
78 channels.append({}) 70 channels.append({})
79 71
80 pages = [] 72 pages = []
81 for ev in midi: 73 for ev in midi:
97 else: 89 else:
98 start = channels[ev.channel][ev.note] 90 start = channels[ev.channel][ev.note]
99 notelen = ctime - start 91 notelen = ctime - start
100 slot = note2slot[note] 92 slot = note2slot[note]
101 #print 'Note %s (%d) at %d length %d' % (note, slot, start, notelen) 93 #print 'Note %s (%d) at %d length %d' % (note, slot, start, notelen)
102 emitnote(pages,outpat, slot, start, notelen, pagewidth, pageheight, pitch, offset, timescale) 94 emitnote(svg, slot, start, notelen, pagewidth, pageheight, pitch, offset, timescale)
103 playablecount += 1 95 playablecount += 1
104 del channels[ev.channel][ev.note] 96 del channels[ev.channel][ev.note]
105 elif ev.type == 'end_of_track': 97 elif ev.type == 'end_of_track':
106 print 'EOT, not flushing, check for missed notes' 98 print 'EOT, not flushing, check for missed notes'
107 for chan in channels: 99 for chan in channels:
108 for ev in chan: 100 for ev in chan:
109 print ev 101 print ev
110 102
111 for svg in pages: 103 npages = int(midi.length / timescale / pagewidth + 0.5)
112 if not svg: 104 print 'npages', npages
113 asdasd 105 for i in range(npages):
114 continue 106 svg.viewbox(pagewidth / 2.54 * 96.0 * i, 0, pagewidth / 2.54 * 96.0, pageheight / 2.54 * 96.0)
115 svg.save() 107 svg.saveas(outpat % i)
116 108
117 print 'Playable count:', playablecount 109 print 'Playable count:', playablecount
118 print 'Unplayable count:', unplayablecount 110 print 'Unplayable count:', unplayablecount
119 111
120 if __name__ == '__main__': 112 if __name__ == '__main__':