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#!/usr/bin/env python
#
# Copyright 2004,2005,2007,2012 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
#
from gnuradio import gr, gru
from gnuradio import audio
from gnuradio import filter
from gnuradio.eng_arg import eng_float, intx
from argparse import ArgumentParser
try:
from gnuradio import analog
except ImportError:
sys.stderr.write("Error: Program requires gr-analog.\n")
sys.exit(1)
try:
from gnuradio import blocks
except ImportError:
sys.stderr.write("Error: Program requires gr-blocks.\n")
sys.exit(1)
class my_top_block(gr.top_block):
def __init__(self):
gr.top_block.__init__(self)
parser = ArgumentParser()
parser.add_argument("-O", "--audio-output", default="",
help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
parser.add_argument("-i", "--input-rate", type=eng_float, default=8000,
help="set input sample rate to RATE %(default)r")
parser.add_argument("-o", "--output-rate", type=eng_float, default=48000,
help="set output sample rate to RATE %(default)r")
args = parser.parse_args()
input_rate = int(args.input_rate)
output_rate = int(args.output_rate)
interp = gru.lcm(input_rate, output_rate) // input_rate
decim = gru.lcm(input_rate, output_rate) // output_rate
print("interp =", interp)
print("decim =", decim)
ampl = 0.1
src0 = analog.sig_source_f(input_rate, analog.GR_SIN_WAVE, 650, ampl)
rr = filter.rational_resampler_fff(interp, decim)
dst = audio.sink(output_rate, args.audio_output)
self.connect(src0, rr, (dst, 0))
if __name__ == '__main__':
try:
my_top_block().run()
except KeyboardInterrupt:
pass
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