Imported Upstream version 3.2.2

[debian/gnuradio] / gnuradio-examples / python / usrp / wfm_rcv_file.py

diff --git a/gnuradio-examples/python/usrp/wfm_rcv_file.py b/gnuradio-examples/python/usrp/wfm_rcv_file.py
deleted file mode 100755 (executable)
index 2c8d4f7..0000000
--- a/gnuradio-examples/python/usrp/wfm_rcv_file.py
+++ /dev/null
@@ -1,99 +0,0 @@
-#!/usr/bin/env python
-
-from gnuradio import gr, eng_notation
-from gnuradio import audio
-# from gnuradio import usrp
-from gnuradio.eng_option import eng_option
-from optparse import OptionParser
-import sys
-import math
-
-
-#
-# return a gr.flow_graph
-#
-def build_graph (input_filename, repeat):
-    adc_rate = 64e6                             # USRP A/D sampling rate
-    decim = 250                                 # FPGA decimated by this amount
-
-    quad_rate = adc_rate / decim                # 256 kHz (the sample rate of the file)
-    audio_decimation = 8
-    audio_rate = quad_rate / audio_decimation   # 32 kHz
-
-    fg = gr.flow_graph ()
-    
-    # usrp is data source
-    # src = usrp.source_c (0, decim)
-    # src.set_rx_freq (0, -IF_freq)
-
-    src = gr.file_source (gr.sizeof_gr_complex, input_filename, repeat)
-    
-    (head, tail) = build_pipeline (fg, quad_rate, audio_decimation)
-
-    # sound card as final sink
-    audio_sink = audio.sink (int (audio_rate))
-
-    # now wire it all together
-    fg.connect (src, head)
-    fg.connect (tail, (audio_sink, 0))
-    
-    return fg
-
-def build_pipeline (fg, quad_rate, audio_decimation):
-    '''Given a flow_graph, fg, construct a pipeline
-    for demodulating a broadcast FM signal.  The
-    input is the downconverteed complex baseband
-    signal. The output is the demodulated audio.
-
-    build_pipeline returns a two element tuple
-    containing the input and output endpoints.
-    '''
-    fm_demod_gain = 2200.0/32768.0
-    audio_rate = quad_rate / audio_decimation
-    volume = 1.0
-
-    # input: complex; output: float
-    fm_demod = gr.quadrature_demod_cf (volume*fm_demod_gain)
-
-    # compute FIR filter taps for audio filter
-    width_of_transition_band = audio_rate / 32
-    audio_coeffs = gr.firdes.low_pass (1.0,            # gain
-                                       quad_rate,      # sampling rate
-                                       audio_rate/2 - width_of_transition_band,
-                                       width_of_transition_band,
-                                       gr.firdes.WIN_HAMMING)
-
-    TAU  = 75e-6  # 75us in US, 50us in EUR
-    fftaps = [ 1 - math.exp(-1/TAU/quad_rate), 0]
-    fbtaps= [ 0 , math.exp(-1/TAU/quad_rate) ]
-    deemph = gr.iir_filter_ffd(fftaps,fbtaps)
-
-    # input: float; output: float
-    audio_filter = gr.fir_filter_fff (audio_decimation, audio_coeffs)
-
-    fg.connect (fm_demod, deemph)
-    fg.connect (deemph, audio_filter)
-    return ((fm_demod, 0), (audio_filter, 0))
-    
-
-def main ():
-    usage = "usage: %prog [options] filename"
-    parser = OptionParser (option_class=eng_option, usage=usage)
-    parser.add_option ("-r", "--repeat", action="store_true", default=False)
-    # parser.add_option (... your stuff here...)
-    (options, args) = parser.parse_args ()
-
-    if len (args) != 1:
-        parser.print_help ()
-        sys.exit (1)
-
-    fg = build_graph (args[0], options.repeat)
-
-    fg.start ()        # fork thread(s) and return
-    raw_input ('Press Enter to quit: ')
-    fg.stop ()
-
-if __name__ == '__main__':
-    main ()
-
-