def alloc_voice(self, chan, note): """ Return None if there are no available voices or if """ if self.m_voices: voice = self.m_voices.pop() else: return None # first, if NOTE is already playing on channel CHAN, we need # to stop it and free the voice used for that. if note in self.m_channel_dict[chan]: solfege_c_midi.seq_stop_note(self.m_devnum, self.m_channel_dict[chan][note], note, 100) self.free_voice(chan, note) # the instrumnet we want the voice to use p = self.m_channel_patches[chan] if self.m_voice_patches[voice] != p: # we need to set the patch for this voice solfege_c_midi.seq_set_patch(self.m_devnum, voice, p) self.m_voice_patches[voice] = p assert note not in self.m_channel_dict[chan] self.m_channel_dict[chan][note] = voice return voice
def play_midieventstream(self, midieventstream): solfege_c_midi.sndctl_seq_reset() self.reset() solfege_c_midi.seq_start_timer() for e in midieventstream: if e[0] == midieventstream.TEMPO: self.__tempo = (e[1], e[2]) elif e[0] == midieventstream.NOTE_ON: channel, note, vel = e[1:4] voice = self.alloc_voice(channel, note) if voice is not None: # FIXME ugly hack for percussion. This will break if # we play polyphonic music with very many voices if channel == 9: # voice == 31: voice = 9 solfege_c_midi.seq_start_note(self.m_devnum, voice, note, vel) elif e[0] == midieventstream.NOTE_OFF: channel, note, vel = e[1:4] voice = self.free_voice(channel, note) if voice is not None: # FIXME, see 10 lines up if channel == 9: # voice == 31: voice = 9 solfege_c_midi.seq_stop_note(self.m_devnum, voice, note, vel) elif e[0] == midieventstream.NOTELEN_TIME: # 96 is a const, also used in soundcard.initialize that # I don't understand. solfege_c_midi.seq_delta_time( int( int(96 * e[1]) * 60.0 * self.__tempo[1] / self.__tempo[0])) elif e[0] == midieventstream.SET_PATCH: self.set_patch(e[1], e[2]) elif e[0] == midieventstream.BENDER: logging.debug("FIXME: DevSequencerSynth.BENDER") #solfege_d_midi.seq_bender(self.m_devnum, e[1], e[2]) elif e[0] == midieventstream.VOLUME: logging.debug( "oss_sequencer: seq_set_volume for /dev/sequencer not tested, so it is commented out." ) #m.seq_set_volume(self.m_devnum, e[1], e[2]) else: raise Exception("oss_sequencer: play track error") solfege_c_midi.seqbuf_dump()
def play_midieventstream(self, midieventstream): solfege_c_midi.sndctl_seq_reset() self.reset() solfege_c_midi.seq_start_timer() for e in midieventstream: if e[0] == midieventstream.TEMPO: self.__tempo = (e[1], e[2]) elif e[0] == midieventstream.NOTE_ON: channel, note, vel = e[1:4] voice = self.alloc_voice(channel, note) if voice is not None: # FIXME ugly hack for percussion. This will break if # we play polyphonic music with very many voices if channel == 9: # voice == 31: voice = 9 solfege_c_midi.seq_start_note(self.m_devnum, voice, note, vel) elif e[0] == midieventstream.NOTE_OFF: channel, note, vel = e[1:4] voice = self.free_voice(channel, note) if voice is not None: # FIXME, see 10 lines up if channel == 9: # voice == 31: voice = 9 solfege_c_midi.seq_stop_note(self.m_devnum, voice, note, vel) elif e[0] == midieventstream.NOTELEN_TIME: # 96 is a const, also used in soundcard.initialize that # I don't understand. solfege_c_midi.seq_delta_time(int(int(96 * e[1]) * 60.0 * self.__tempo[1] / self.__tempo[0])) elif e[0] == midieventstream.SET_PATCH: self.set_patch(e[1], e[2]) elif e[0] == midieventstream.BENDER: logging.debug("FIXME: DevSequencerSynth.BENDER") #solfege_d_midi.seq_bender(self.m_devnum, e[1], e[2]) elif e[0] == midieventstream.VOLUME: logging.debug("oss_sequencer: seq_set_volume for /dev/sequencer not tested, so it is commented out.") #m.seq_set_volume(self.m_devnum, e[1], e[2]) else: raise Exception("oss_sequencer: play track error") solfege_c_midi.seqbuf_dump()