src/songs/synth.py

   1 # -*- coding: utf-8 -*-
   2 """
   3 module pour jouer les chansons sur le fluidsynth
   4
   5 $Id$
   6 $URL$
   7 """
   8 import fluidsynth
   9 from app.musicxml import musicXml2Song
  10 from time import sleep
  11 import sys
  12 from optparse import OptionParser
  13
  14 class SongPlayer(object) :
  15     """ Lecteur audio d'une chanson """
  16
  17     def __init__(self, part, soundFont, quarterNoteDuration=400, bank=0, preset=0) :
  18         self.part = part
  19         self.quarterNoteDuration = quarterNoteDuration
  20         self.fs = fs = fluidsynth.Synth()
  21         fs.start()
  22         self.fsid = fsid = fs.sfload(soundFont)
  23         fs.program_select(0, fsid, bank, preset)
  24
  25     def __del__(self) :
  26         self.fs.delete()
  27
  28     def play(self) :
  29         fs = self.fs
  30         for note, verseIndex in self.part.iterNotes(indefinitely=False) :
  31             try :
  32                 print note, note.lyrics[verseIndex]
  33             except IndexError :
  34                 print note, '?'
  35             fs.noteon(0, note.midi, 64)
  36             duration = note.duration * self.quarterNoteDuration / 1000
  37             sleep(duration)
  38             fs.noteoff(0, note.midi)
  39
  40
  41
  42
  43
  44 def main() :
  45     usage = "%prog musicXmlFile.xml [options]"
  46     op = OptionParser(usage)
  47     op.add_option("-i", "--part-index", dest="partIndex"
  48                  , default = 0
  49                  , help = "Index de la partie qui contient le champ.")
  50
  51     op.add_option("-c", '--no-chorus', dest='autoDetectChorus'
  52              , action="store_false"
  53              , default = True
  54              , help = "désactive la détection du refrain")
  55
  56     op.add_option("-q", "--quarter-note-duration", dest="quarterNoteDuration"
  57                   , type="int", default=400
  58                   , help="Durée de la noire [default] (en millisecondes)"
  59                   )
  60
  61     op.add_option("-b", "--bank", dest="bank"
  62                   , type="int", default="0"
  63                   , help="midi bank [default]")
  64
  65     op.add_option("-p", "--preset", dest="preset"
  66                 , type="int", default="0"
  67                 , help="midi preset [default]")
  68
  69     options, args = op.parse_args()
  70
  71     if len(args) != 1 :
  72         raise SystemExit(op.format_help())
  73
  74     song = musicXml2Song(args[0],
  75                          partIndex=options.partIndex,
  76                          autoDetectChorus=options.autoDetectChorus)
  77     sp = SongPlayer(song,
  78                     '/Users/pinbe/dev/minwii/fluid-soundfont-3.1/FluidR3_GM.sf2',
  79                     quarterNoteDuration=options.quarterNoteDuration,
  80                     bank = options.bank,
  81                     preset = options.preset)
  82     sp.play()
  83
  84
  85 if __name__ == '__main__' :
  86     sys.exit(main())