From e8b4e619479dd23d87c3aef042f2452f867a1e18 Mon Sep 17 00:00:00 2001
From: Ben Reynwar <ben@reynwar.net>
Date: Thu, 7 Mar 2013 23:22:22 -0700
Subject: fft: Enabling uninstalled python imports.
---
gr-fft/python/logpwrfft.py | 176 ---------------------------------------------
1 file changed, 176 deletions(-)
delete mode 100644 gr-fft/python/logpwrfft.py
(limited to 'gr-fft/python/logpwrfft.py')
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, )
-
--
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