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import math
class BaseStart(object):
"Base class for context manager to start and stop the audio server automatically."
def __init__(self, audio_server):
self._audio_server = audio_server
self._sr = audio_server.getSamplingRate()
self._bs = audio_server.getBufferSize()
def __enter__(self):
self._audio_server.start()
return self
def __exit__(self, type, value, traceback):
self._audio_server.stop()
def advance(self, dur):
numbuf = int(math.ceil(dur * self._sr / self._bs))
for i in range(numbuf):
self._audio_server.process()
def advanceOneBuf(self):
self._audio_server.process()
class Start(BaseStart):
"Context manager to start and stop the audio server automatically."
def __init__(self, audio_server):
BaseStart.__init__(self, audio_server)
class StartAndAdvance(BaseStart):
"""
Context manager to start and stop the audio server automatically.
Advance `adv_time` seconds just after entering the context.
"""
def __init__(self, audio_server, adv_time):
BaseStart.__init__(self, audio_server)
self._numbuf = int(math.ceil(adv_time * self._sr / self._bs))
def __enter__(self):
self._audio_server.start()
for i in range(self._numbuf):
self._audio_server.process()
return self
class StartAndAdvanceOneBuf(BaseStart):
"""
Context manager to start and stop the audio server automatically.
Advance one buffer size just after entering the context.
"""
def __init__(self, audio_server):
BaseStart.__init__(self, audio_server)
def __enter__(self):
self._audio_server.start()
self._audio_server.process()
return self
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