def __init__(self, filename, sequence_index=0):
self.channels = 2
self.bits = 16
self.bytes = self.bits / 8
self.rate = 44100
self.audio_format = AudioFormat(self.channels, self.bits, self.rate)
self.sequencer = Sequencer(load(filename))
self.sequencer.debug_print_division = False
self.sequencer.debug_print_tick = False
while self.sequencer.sequence_index < sequence_index - 1:
self.sequencer.tick()
self.sequencer.debug_print_division = True
self.sequencer.debug_print_tick = False
while self.sequencer.sequence_index < sequence_index:
self.sequencer.tick()
self.ratecv_state = [None] * self.sequencer.module.num_channels
self._ratecv([dummy_sample] * self.sequencer.module.num_channels)
self.timestamp = 0.0
self.muted = []
class SequencerSource(StreamingSource):
def __init__(self, filename, sequence_index=0):
self.channels = 2
self.bits = 16
self.bytes = self.bits / 8
self.rate = 44100
self.audio_format = AudioFormat(self.channels, self.bits, self.rate)
self.sequencer = Sequencer(load(filename))
self.sequencer.debug_print_division = False
self.sequencer.debug_print_tick = False
while self.sequencer.sequence_index < sequence_index - 1:
self.sequencer.tick()
self.sequencer.debug_print_division = True
self.sequencer.debug_print_tick = False
while self.sequencer.sequence_index < sequence_index:
self.sequencer.tick()
self.ratecv_state = [None] * self.sequencer.module.num_channels
self._ratecv([dummy_sample] * self.sequencer.module.num_channels)
self.timestamp = 0.0
self.muted = []
def _get_tick_time(self):
return self.sequencer.tick_time
tick_time = property(_get_tick_time)
def _mute(self, sound):
for n in range(len(sound)):
if n in self.muted:
sound[n] = dummy_sample
def _ratecv(self, sounds):
output = []
for n, (sound, state) in enumerate(zip(sounds, self.ratecv_state)):
while True:
o, state = ratecv(sound, self.bytes, 1,
int(round(len(sound) / self.tick_time) / self.bytes),
self.rate,
state)
#Length may be off by one, so process until OK
if len(o) == int(round(self.rate * self.tick_time * self.bytes)):
break
output.append(o)
self.ratecv_state[n] = state
return output
def _get_audio_length(self):
return int(self.channels * self.bytes * self.rate * self.tick_time)
audio_length = property(_get_audio_length)
def _scale(self, output):
return [mul(o, self.bytes, 1.0 / (len(output) / self.channels)) for o in output]
def _tostereo(self, output):
return [tostereo(o, self.bytes, n % 2, (n + 1) % 2) for n, o in enumerate(output)]
def _get_audio_data(self, num_bytes):
sound = self.sequencer.tick()
if sound is None:
pyglet.app.exit()
return
self._mute(sound)
sound = [lin2lin(s, 1, self.bytes) for s in sound]
output = self._ratecv(sound)
output = self._scale(output)
output = self._tostereo(output)
stereo = mix(output, self.bytes)
audio = AudioData(stereo, self.audio_length, self.timestamp, self.tick_time)
self.timestamp += self.tick_time
return audio
def mute(self, channels):
self.muted = channels
