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class IrBlaster(object):
'''Infrared blaster facade.'''
@staticmethod
def periods_to_microseconds(frequency, pattern):
'''Convert a pattern from period counts to microseconds.
'''
period = 1000000. / frequency
return [period * x for x in pattern]
@staticmethod
def microseconds_to_periods(frequency, pattern):
'''Convert a pattern from microseconds to period counts.
'''
period = 1000000. / frequency
return [x / period for x in pattern]
@property
def frequencies(self):
'''Property which contains a list of frequency ranges
supported by the device in the form:
[(from1, to1),
(from2, to2),
...
(fromN, toN)]
'''
return self.get_frequencies()
def get_frequencies(self):
return self._get_frequencies()
def _get_frequencies(self):
raise NotImplementedError()
def transmit(self, frequency, pattern, mode='period'):
'''Transmit an IR sequence.
:parameters:
`frequency`: int
Carrier frequency for the IR transmission.
`pattern`: list[int]
Burst pair pattern to transmit.
`mode`: str, defaults to 'period'
Specifies the format of the pattern values.
Can be 'period' or 'microseconds'.
'''
return self._transmit(frequency, pattern, mode)
def _transmit(self, frequency, pattern, mode):
raise NotImplementedError()
def exists(self):
'''Check if the device has an infrared emitter.
'''
return self._exists()
def _exists(self):
raise NotImplementedError()
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