def get_audio_power(self):
if self.get_is_valid():
return todB(
max(_audio_power_minimum_amplitude, self.probe_audio.level()))
else:
# will not be receiving samples, so probe's value will be meaningless
return _audio_power_minimum_dB
def __rebuild(self):
if self.__signal_type.is_analytic():
input_length = self.__freq_resolution
output_length = self.__freq_resolution
self.__after_fft = None
else:
# use vector_to_streams to cut the output in half and discard the redundant part
input_length = self.__freq_resolution * 2
output_length = self.__freq_resolution
self.__after_fft = blocks.vector_to_streams(
itemsize=output_length * gr.sizeof_float, nstreams=2)
sample_rate = self.__signal_type.get_sample_rate()
overlap_factor = int(
math.ceil(_maximum_fft_rate * input_length / sample_rate))
# sanity limit -- OverlapGimmick is not free
overlap_factor = min(16, overlap_factor)
self.__gate = blocks.copy(gr.sizeof_gr_complex)
self.__gate.set_enabled(not self.__paused)
self.__fft_sink = MessageDistributorSink(
itemsize=output_length * gr.sizeof_char,
context=self.__context,
migrate=self.__fft_sink,
notify=self.__update_interested)
self.__overlapper = _OverlapGimmick(size=input_length,
factor=overlap_factor,
itemsize=self.__itemsize)
# Adjusts units so displayed level is independent of resolution and sample rate. Also throw in the packing offset
compensation = todB(input_length / sample_rate) + self.__power_offset
# TODO: Consider not using the logpwrfft block
self.__logpwrfft = logpwrfft.logpwrfft_c(
sample_rate=sample_rate * overlap_factor,
fft_size=input_length,
ref_scale=10.0**(-compensation / 20.0) *
2, # not actually using this as a reference scale value but avoiding needing to use a separate add operation to apply the unit change -- this expression is the inverse of what logpwrfft does internally
frame_rate=self.__frame_rate,
avg_alpha=1.0,
average=False)
# It would make slightly more sense to use unsigned chars, but blocks.float_to_uchar does not support vlen.
self.__fft_converter = blocks.float_to_char(
vlen=self.__freq_resolution, scale=1.0)
self.__scope_sink = MessageDistributorSink(
itemsize=self.__time_length * gr.sizeof_gr_complex,
context=self.__context,
migrate=self.__scope_sink,
notify=self.__update_interested)
self.__scope_chunker = blocks.stream_to_vector_decimator(
item_size=gr.sizeof_gr_complex,
sample_rate=sample_rate,
vec_rate=self.__frame_rate, # TODO doesn't need to be coupled
vec_len=self.__time_length)
def __rebuild(self):
if self.__signal_type.is_analytic():
input_length = self.__freq_resolution
output_length = self.__freq_resolution
self.__after_fft = None
else:
# use vector_to_streams to cut the output in half and discard the redundant part
input_length = self.__freq_resolution * 2
output_length = self.__freq_resolution
self.__after_fft = blocks.vector_to_streams(itemsize=output_length * gr.sizeof_float, nstreams=2)
sample_rate = self.__signal_type.get_sample_rate()
overlap_factor = int(math.ceil(_maximum_fft_rate * input_length / sample_rate))
# sanity limit -- OverlapGimmick is not free
overlap_factor = min(16, overlap_factor)
self.__gate = blocks.copy(gr.sizeof_gr_complex)
self.__gate.set_enabled(not self.__paused)
self.__fft_sink = MessageDistributorSink(
itemsize=output_length * gr.sizeof_char,
context=self.__context,
migrate=self.__fft_sink,
notify=self.__update_interested)
self.__overlapper = _OverlapGimmick(
size=input_length,
factor=overlap_factor,
itemsize=self.__itemsize)
# Adjusts units so displayed level is independent of resolution and sample rate. Also throw in the packing offset
compensation = todB(input_length / sample_rate) + self.__power_offset
# TODO: Consider not using the logpwrfft block
self.__logpwrfft = logpwrfft.logpwrfft_c(
sample_rate=sample_rate * overlap_factor,
fft_size=input_length,
ref_scale=10.0 ** (-compensation / 20.0) * 2, # not actually using this as a reference scale value but avoiding needing to use a separate add operation to apply the unit change -- this expression is the inverse of what logpwrfft does internally
frame_rate=self.__frame_rate,
avg_alpha=1.0,
average=False)
# It would make slightly more sense to use unsigned chars, but blocks.float_to_uchar does not support vlen.
self.__fft_converter = blocks.float_to_char(vlen=self.__freq_resolution, scale=1.0)
self.__scope_sink = MessageDistributorSink(
itemsize=self.__time_length * gr.sizeof_gr_complex,
context=self.__context,
migrate=self.__scope_sink,
notify=self.__update_interested)
self.__scope_chunker = blocks.stream_to_vector_decimator(
item_size=gr.sizeof_gr_complex,
sample_rate=sample_rate,
vec_rate=self.__frame_rate, # TODO doesn't need to be coupled
vec_len=self.__time_length)
def get_gain(self):
return todB(self.__mult.k().real)
def get_gain(self):
return todB(self.__mult.k().real)
def get_rf_power(self):
return todB(max(1e-10, self.rf_probe_block.level()))
def get_agc_gain(self):
return todB(self.agc_block.gain())
def get_audio_power(self):
if self.get_is_valid():
return todB(max(_audio_power_minimum_amplitude, self.probe_audio.level()))
else:
# will not be receiving samples, so probe's value will be meaningless
return _audio_power_minimum_dB
def get_rf_power(self):
return todB(max(1e-10, self.rf_probe_block.level()))
def get_agc_gain(self):
return todB(self.agc_block.gain())
