Mercurial > ~darius > hgwebdir.cgi > musiccutter

annotate musiccutter.py @ 20:9bb72ae63651

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- Make various things optional. - Fix card size typo.
author Daniel O'Connor <darius@dons.net.au>
date Tue, 26 Apr 2016 21:35:54 +0930
parents ffaf97818ce3
children c710c4c3f44f
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1 #!/usr/bin/env python
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2
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3 import exceptions
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4 import itertools
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5 import math
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6 import mido
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7 import os
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8 import reportlab.lib.colors
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9 import reportlab.pdfgen.canvas
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10 from reportlab.lib.units import mm
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11 import sys
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12
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13 CUT_COLOUR = reportlab.lib.colors.red
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14 ENGRAVE_COLOUR = reportlab.lib.colors.black
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15
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16 def test(filename = None):
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17 if filename == None:
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18 filename = 'test.midi'
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19 # Card layout from http://www.orgues-de-barbarie.com/wp-content/uploads/2014/09/format-cartons.pdf
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20 # Notes are read from right to left
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21 m = Midi2PDF('notes', 120, 155, 5.5, 3.0, 6.0, 50, False, False, False, False, 10, 'Helvetica', 12)
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22 base, ext = os.path.splitext(filename)
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23 m.processMidi(filename, base + '-%02d.pdf')
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24
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25 class Midi2PDF(object):
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26 def __init__(self, notefile, pagewidth, pageheight, pitch, slotsize, offset, leadin, timemarks, drawrect, notenames, notelines, timescale, fontname, fontsize):
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27 self.midi2note, self.note2midi = Midi2PDF.genmidi2note()
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28 self.note2slot, self.slot2note = Midi2PDF.loadnote2slot(notefile, self.note2midi)
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29 self.pagewidth = pagewidth # Dimensions are in millimetres
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30 self.pageheight = pageheight
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31 self.pitch = pitch # Distance between each slot
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32 self.slotsize = slotsize # Size of each slot cut out
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33 self.offset = offset # Bottom margin
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34 self.leadin = leadin # Extra at the start
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35 self.timemarks = timemarks # Draw vertical time lines
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36 self.drawrect = drawrect # Draw rectangle around each page
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37 self.notenames = notenames # Draw note names on the right edge
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38 self.notelines = notelines # Draw line rulers
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39 self.timescale = timescale # Width per second
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40 self.fontname = fontname
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41 self.fontsize = fontsize # Points
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42
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43 def processMidi(self, midifile, outpat):
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44 playablecount = 0
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45 unplayablecount = 0
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46 midi = mido.MidiFile(midifile)
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47 ctime = 0
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48 channels = []
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49 for i in range(16):
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50 channels.append({})
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51
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52 npages = int(math.ceil(((midi.length * self.timescale) + self.leadin) / self.pagewidth))
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53 print 'npages', npages
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54 pdfs = []
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55 for i in range(npages):
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56 pdf = reportlab.pdfgen.canvas.Canvas(file(outpat % (i + 1), 'w'), pagesize = (self.pagewidth * mm, self.pageheight * mm))
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57 pdfs.append(pdf)
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58
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59 title = midifile
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60 for ev in midi:
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61 if ev.type == 'text' and ctime == 0:
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62 title = ev.text
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63
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64 ctime += ev.time
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65 if ev.type == 'note_on' or ev.type == 'note_off':
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66 note = self.midi2note[ev.note]
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67 #print ctime, ev
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68 if ev.type == 'note_on' and ev.velocity > 0:
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69 if ev.note in channels[ev.channel]:
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70 print 'Duplicate note_on message %d (%s)' % (ev.note, note)
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71 else:
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72 channels[ev.channel][ev.note] = ctime
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73 elif ev.type == 'note_off' or (ev.type == 'note_on' and ev.velocity == 0):
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74 if ev.note not in channels[ev.channel]:
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75 print 'note_off with no corresponding note_on for channel %d note %d' % (ev.channel, ev.note)
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76 else:
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77 if note not in self.note2slot:
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78 print 'Skipping unplayable note %s' % (note)
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79 unplayablecount += 1
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80 else:
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81 start = channels[ev.channel][ev.note]
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82 notelen = ctime - start
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83 slot = self.note2slot[note]
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84 print 'Note %s (%d) at %.2f length %.2f' % (note, slot, start, notelen)
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85 self.emitnote(pdfs, slot, start, notelen)
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86 playablecount += 1
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87 del channels[ev.channel][ev.note]
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88 elif ev.type == 'end_of_track':
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89 print 'EOT, not flushing, check for missed notes'
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90 for chan in channels:
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91 for ev in chan:
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92 print ev
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93
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94 print 'Playable count:', playablecount
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95 print 'Unplayable count:', unplayablecount
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96
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97 for pindx in range(len(pdfs)):
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98 pdf = pdfs[pindx]
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99 # Add title and page number
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100 Midi2PDF.textHelper(pdf, 0 * mm, 1 * mm, ENGRAVE_COLOUR, True, self.fontname, self.fontsize, '%s (%d / %d)' % (title, pindx + 1, npages))
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101
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102 pdf.saveState() # Not really necessary since this is last thing we do
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103 pdf.setLineWidth(0)
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104
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105 # Draw time marks
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106 if self.timemarks:
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107 tstart = self.leadin / self.timescale
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108 tend = self.pagewidth / self.timescale
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109 if pindx > 0:
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110 tsize = self.pagewidth / self.timescale
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111 tstart = tend + tsize * pindx
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112 tend = tend + tsize * (pindx + 1)
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113 for s in range(tstart, tend, 5):
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114 x = self.pagewidth - (float(s * self.timescale + self.leadin) % self.pagewidth)
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115 pdf.line(x * mm, self.offset, x * mm, self.pageheight * mm)
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116 Midi2PDF.textHelper(pdf, x * mm, 1 * mm, ENGRAVE_COLOUR, False, self.fontname, self.fontsize, str(s) + 's')
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117
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118 # Draw rectangle around page
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119 if self.drawrect:
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120 pdf.rect(0, 0, self.pagewidth * mm, self.pageheight * mm, fill = False, stroke = True)
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121 pdf.line(0, 0, 0, self.pagewidth * mm)
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122 pdf.line(0, self.pagewidth * mm, self.pagewidth * mm, self.pageheight * mm)
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123 pdf.line(self.pagewidth * mm, self.pageheight * mm, 0, self.pageheight * mm)
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124 pdf.line(0, self.pageheight * mm, 0, 0)
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125
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126 # Draw lines per note
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127 for slot in sorted(self.slot2note.keys()):
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128 ofs = (self.offset + slot * self.pitch) * mm
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129 if self.notelines:
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130 pdf.line(0, ofs, self.pagewidth * mm, ofs)
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131 # Note name
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132 if self.notenames:
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133 Midi2PDF.textHelper(pdf, (self.pagewidth - 10) * mm, ofs + 1 * mm, ENGRAVE_COLOUR, False, self.fontname, self.fontsize, self.slot2note[slot])
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134 pdf.save()
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135
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136 # http://newt.phys.unsw.edu.au/jw/notes.html
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137 @staticmethod
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138 def genmidi2note():
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139 '''Create forward & reverse tables for midi number to note name (assuming 69 = A4 = A440)'''
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140 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']
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141 midi2note = {}
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142 note2midi = {}
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143 for midi in range(21, 128):
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144 octave = midi / len(names) - 1
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145 index = midi % len(names)
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146 name = names[index] % (octave)
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147 midi2note[midi] = name
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148 note2midi[name] = midi
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149
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150 return midi2note, note2midi
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151
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152 @staticmethod
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153 def loadnote2slot(fname, note2midi):
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154 note2slot = {}
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155 slot2note = {}
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156 index = 0
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157
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158 for note in file(fname):
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159 note = note.strip()
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160 if note[0] == '#':
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161 continue
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162 if note not in note2midi:
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163 raise exceptions.ValueError('Note \'%s\' not valid' % note)
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164 note2slot[note] = index
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165 slot2note[index] = note
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166 index += 1
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167
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168 return note2slot, slot2note
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169
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170 def emitnote(self, pdfs, slot, start, notelen):
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171 x = start * self.timescale + self.leadin # Convert start time to distance
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172 pageidx = int(x / self.pagewidth) # Determine which page
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173 x = x % self.pagewidth # and where on that page
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174 h = self.slotsize
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175 y = self.offset + slot * self.pitch + (self.pitch - h) / 2
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176 w = notelen * self.timescale # Convert note length in time to distance
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177
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178 print 'page = %d x = %.3f y = %.3f w = %.3f h = %.3f' % (pageidx, x, y, w, h)
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179 w1 = w
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180 # Check if the note crosses a page
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181 if x + w > self.pagewidth:
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182 w1 = self.pagewidth - x # Crop first note
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183 w2 = w - w1 # Calculate length of second note
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184 assert w2 <= self.pagewidth, 'note extends for more than a page'
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185 # Emit second half of note
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186 print 'split note, page %d w2 = %.3f' % (pageidx + 1, w2)
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187 Midi2PDF._emitnote(pdfs[pageidx + 1], self.pagewidth - w2, y, w2, h)
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188
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189 Midi2PDF._emitnote(pdfs[pageidx], self.pagewidth - x - w1, y, w1, h)
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190
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191 @staticmethod
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192 def _emitnote(pdf, x, y, w, h):
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193 pdf.saveState()
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194 pdf.setStrokeColor(CUT_COLOUR)
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195 pdf.setLineWidth(0)
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196 pdf.rect(x * mm, y * mm, w * mm, h * mm, fill = False, stroke = True)
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197 pdf.restoreState()
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198
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199 @staticmethod
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200 def textHelper(pdf, x, y, colour, fill, fontname, fontsize, text):
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201 tobj = pdf.beginText()
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202 tobj.setTextOrigin(x, y)
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203 tobj.setFont(fontname, fontsize)
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204 tobj.setStrokeColor(colour)
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205 tobj.setFillColor(colour)
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206 if fill:
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207 tobj.setTextRenderMode(0)
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208 else:
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209 tobj.setTextRenderMode(1)
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210 tobj.textLine(text)
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211 pdf.drawText(tobj)
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212
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213 if __name__ == '__main__':
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214 main()