src/app/synth.py

   1 # -*- coding: utf-8 -*-
   2 """
   3 module de wrapping du synthétiseur
   4
   5 $Id$
   6 $URL$
   7 """
   8 from os.path import realpath, sep, exists
   9 from  fluidsynth import Synth as FSynth
  10
  11 class Synth(FSynth) :
  12
  13     def __init__(self, gain=0.2, samplerate=44100) :
  14         FSynth.__init__(self, gain=gain, samplerate=samplerate)
  15
  16         sfPath = realpath(__file__).split(sep)
  17         sfPath = sfPath[:-1]
  18         sfPath.append('soundfonts')
  19
  20         sfPath.append('FluidR3_GM.sf2')
  21         sfPath = sep.join(sfPath)
  22         assert exists(sfPath)
  23
  24         self.start()
  25         self.fsid = self.sfload(sfPath)
  26         self._octaveAjusts = {}
  27
  28     def adjust_octave(self, chan, octave) :
  29         '''
  30         Abaisse ou élève les notes de n octave
  31         '''
  32         self._octaveAjusts[chan] = octave
  33
  34     def sfunload(self, update_midi_preset=0):
  35         FSynth.sfunload(self, self.fsid, update_midi_preset=update_midi_preset)
  36
  37     def program_select(self, chan, bank, preset):
  38         FSynth.program_select(self, chan, self.fsid, bank, preset)
  39
  40     def sfont_select(self, chan):
  41         FSynth.sfont_select(self, chan, self.fsid)
  42
  43     def noteon(self, chan, key, vel):
  44         key = key + self._octaveAjusts.get(chan, 0) * 12
  45         FSynth.noteon(self, chan, key, vel)
  46
  47     def noteoff(self, chan, key) :
  48         key = key + self._octaveAjusts.get(chan, 0) * 12
  49         FSynth.noteoff(self, chan, key)
  50
  51
  52 if __name__ == '__main__' :
  53     initsynth()