diff options
| author | Ben Reynwar <ben@reynwar.net> | 2013-03-07 23:22:22 -0700 |
|---|---|---|
| committer | Ben Reynwar <ben@reynwar.net> | 2013-03-07 23:22:22 -0700 |
| commit | e8b4e619479dd23d87c3aef042f2452f867a1e18 (patch) | |
| tree | d764b31492566f39b63b6c49a0b776faa81d90ac /gr-fft/python/logpwrfft.py | |
| parent | b91a9bbfb20c5bd1849c8f8e91468bc161595c4c (diff) | |
fft: Enabling uninstalled python imports.
Diffstat (limited to 'gr-fft/python/logpwrfft.py')
| -rw-r--r-- | gr-fft/python/logpwrfft.py | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/gr-fft/python/logpwrfft.py b/gr-fft/python/logpwrfft.py deleted file mode 100644 index 98303b1e1e..0000000000 --- a/gr-fft/python/logpwrfft.py +++ /dev/null @@ -1,176 +0,0 @@ -# -# Copyright 2008 Free Software Foundation, Inc. -# -# This file is part of GNU Radio -# -# GNU Radio is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 3, or (at your option) -# any later version. -# -# GNU Radio is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with GNU Radio; see the file COPYING. If not, write to -# the Free Software Foundation, Inc., 51 Franklin Street, -# Boston, MA 02110-1301, USA. -# - -from gnuradio import gr -from gnuradio import blocks -import sys, math - -import fft_swig as fft -import window - -try: - from gnuradio import filter -except ImportError: - sys.stderr.write('fft.logpwrfft required gr-filter.\n') - sys.exit(1) - -class _logpwrfft_base(gr.hier_block2): - """ - Create a log10(abs(fft)) stream chain, with real or complex input. - """ - - def __init__(self, sample_rate, fft_size, ref_scale, frame_rate, avg_alpha, average, win=None): - """ - Create an log10(abs(fft)) stream chain. - Provide access to the setting the filter and sample rate. - - Args: - sample_rate: Incoming stream sample rate - fft_size: Number of FFT bins - ref_scale: Sets 0 dB value input amplitude - frame_rate: Output frame rate - avg_alpha: FFT averaging (over time) constant [0.0-1.0] - average: Whether to average [True, False] - win: the window taps generation function - """ - gr.hier_block2.__init__(self, self._name, - gr.io_signature(1, 1, self._item_size), # Input signature - gr.io_signature(1, 1, gr.sizeof_float*fft_size)) # Output signature - - self._sd = blocks.stream_to_vector_decimator(item_size=self._item_size, - sample_rate=sample_rate, - vec_rate=frame_rate, - vec_len=fft_size) - - if win is None: win = window.blackmanharris - fft_window = win(fft_size) - fft = self._fft_block[0](fft_size, True, fft_window) - window_power = sum(map(lambda x: x*x, fft_window)) - - c2magsq = blocks.complex_to_mag_squared(fft_size) - self._avg = filter.single_pole_iir_filter_ff(1.0, fft_size) - self._log = blocks.nlog10_ff(10, fft_size, - -20*math.log10(fft_size) # Adjust for number of bins - -10*math.log10(window_power/fft_size) # Adjust for windowing loss - -20*math.log10(ref_scale/2)) # Adjust for reference scale - self.connect(self, self._sd, fft, c2magsq, self._avg, self._log, self) - - self._average = average - self._avg_alpha = avg_alpha - self.set_avg_alpha(avg_alpha) - self.set_average(average) - - def set_decimation(self, decim): - """ - Set the decimation on stream decimator. - - Args: - decim: the new decimation - """ - self._sd.set_decimation(decim) - - def set_vec_rate(self, vec_rate): - """ - Set the vector rate on stream decimator. - - Args: - vec_rate: the new vector rate - """ - self._sd.set_vec_rate(vec_rate) - - def set_sample_rate(self, sample_rate): - """ - Set the new sampling rate - - Args: - sample_rate: the new rate - """ - self._sd.set_sample_rate(sample_rate) - - def set_average(self, average): - """ - Set the averaging filter on/off. - - Args: - average: true to set averaging on - """ - self._average = average - if self._average: - self._avg.set_taps(self._avg_alpha) - else: - self._avg.set_taps(1.0) - - def set_avg_alpha(self, avg_alpha): - """ - Set the average alpha and set the taps if average was on. - - Args: - avg_alpha: the new iir filter tap - """ - self._avg_alpha = avg_alpha - self.set_average(self._average) - - def sample_rate(self): - """ - Return the current sample rate. - """ - return self._sd.sample_rate() - - def decimation(self): - """ - Return the current decimation. - """ - return self._sd.decimation() - - def frame_rate(self): - """ - Return the current frame rate. - """ - return self._sd.frame_rate() - - def average(self): - """ - Return whether or not averaging is being performed. - """ - return self._average - - def avg_alpha(self): - """ - Return averaging filter constant. - """ - return self._avg_alpha - -class logpwrfft_f(_logpwrfft_base): - """ - Create an fft block chain, with real input. - """ - _name = "logpwrfft_f" - _item_size = gr.sizeof_float - _fft_block = (fft.fft_vfc, ) - -class logpwrfft_c(_logpwrfft_base): - """ - Create an fft block chain, with complex input. - """ - _name = "logpwrfft_c" - _item_size = gr.sizeof_gr_complex - _fft_block = (fft.fft_vcc, ) - |