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()
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
