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#!/usr/bin/env python
#################################################################################
#
# Multiprotocol Digital Voice TX (C) Copyright 2017 Max H. Parke KA1RBI
#
# This file is part of OP25
#
# This 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.
#
# This software 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 this software; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#################################################################################
import sys
import os
import math
from gnuradio import gr, gru, audio, eng_notation
from gnuradio import filter, blocks, analog, digital
from gnuradio.eng_option import eng_option
from optparse import OptionParser
import op25
import op25_repeater
from math import pi
from op25_c4fm_mod import p25_mod_bf
RC_FILTER = {'dmr': 'rrc', 'p25': 'rc', 'ysf': 'rrc', 'dstar': None}
output_gains = {
'dmr': 5.5,
'dstar': 0.95,
'p25': 4.5,
'ysf': 5.5
}
gain_adjust = {
'dmr': 3.0,
'dstar': 7.5,
'ysf': 4.0
}
gain_adjust_fullrate = {
'p25': 2.0,
'ysf': 3.0
}
mod_adjust = { # rough values
'dmr': 0.35,
'dstar': 0.075,
'p25': 0.33,
'ysf': 0.42
}
class my_top_block(gr.top_block):
"""
Reads up to two channels of input and generates an output stream (in float format)
Input may be either from sound card or from files.
Likewise the output channel may be directed to an audio output or to a file.
the output audio is suitable for direct application to an FM modulator
"""
def __init__(self):
global output_gains, gain_adjust, gain_adjust_fullrate, mod_adjust
gr.top_block.__init__(self)
parser = OptionParser(option_class=eng_option)
parser.add_option("-a", "--args", type="string", default="", help="device args")
parser.add_option("-b", "--bt", type="float", default=0.5, help="specify bt value")
parser.add_option("-c", "--config-file", type="string", default=None, help="specify the config file name")
parser.add_option("-f", "--file1", type="string", default=None, help="specify the input file slot 1")
parser.add_option("-F", "--file2", type="string", default=None, help="specify the input file slot 2 (DMR)")
parser.add_option("-g", "--gain", type="float", default=1.0, help="input gain")
parser.add_option("-i", "--if-rate", type="int", default=480000, help="output rate to sdr")
parser.add_option("-I", "--audio-input", type="string", default="", help="pcm input device name. E.g., hw:0,0 or /dev/dsp")
parser.add_option("-k", "--symbol-sink", type="string", default=None, help="write symbols to file (optional)")
parser.add_option("-N", "--gains", type="string", default=None, help="gain settings")
parser.add_option("-O", "--audio-output", type="string", default="default", help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
parser.add_option("-o", "--output-file", type="string", default=None, help="specify the output file")
parser.add_option("-p", "--protocol", type="choice", default=None, choices=('dmr', 'dstar', 'p25', 'ysf'), help="specify protocol: dmr, dstar, p25, ysf")
parser.add_option("-q", "--frequency-correction", type="float", default=0.0, help="ppm")
parser.add_option("-Q", "--frequency", type="float", default=0.0, help="Hz")
parser.add_option("-r", "--repeat", action="store_true", default=False, help="input file repeat")
parser.add_option("-R", "--fullrate-mode", action="store_true", default=False, help="ysf fullrate")
parser.add_option("-s", "--modulator-rate", type="int", default=48000, help="must be submultiple of IF rate")
parser.add_option("-S", "--alsa-rate", type="int", default=48000, help="sound source/sink sample rate")
parser.add_option("-t", "--test", type="string", default=None, help="test pattern symbol file")
parser.add_option("-v", "--verbose", type="int", default=0, help="additional output")
(options, args) = parser.parse_args()
max_inputs = 1
if options.protocol is None:
print 'protocol [-p] option missing'
sys.exit(0)
if options.protocol == 'ysf' or options.protocol == 'dmr':
assert options.config_file # dmr and ysf require config file ("-c FILENAME" option)
output_gain = output_gains[options.protocol]
if options.test: # input file is in symbols of size=char
ENCODER = blocks.file_source(gr.sizeof_char, options.test, True)
elif options.protocol == 'dmr':
max_inputs = 2
ENCODER = op25_repeater.ambe_encoder_sb(options.verbose)
ENCODER2 = op25_repeater.ambe_encoder_sb(options.verbose)
ENCODER2.set_gain_adjust(gain_adjust['dmr'])
DMR = op25_repeater.dmr_bs_tx_bb(options.verbose, options.config_file)
self.connect(ENCODER, (DMR, 0))
self.connect(ENCODER2, (DMR, 1))
elif options.protocol == 'dstar':
ENCODER = op25_repeater.dstar_tx_sb(options.verbose, options.config_file)
elif options.protocol == 'p25':
ENCODER = op25_repeater.vocoder(True, # 0=Decode,True=Encode
False, # Verbose flag
0, # flex amount
"", # udp ip address
0, # udp port
False) # dump raw u vectors
elif options.protocol == 'ysf':
ENCODER = op25_repeater.ysf_tx_sb(options.verbose, options.config_file, options.fullrate_mode)
if options.fullrate_mode:
ENCODER.set_gain_adjust(gain_adjust_fullrate['ysf'])
else:
ENCODER.set_gain_adjust(gain_adjust['ysf'])
if options.protocol == 'p25' and not options.test:
ENCODER.set_gain_adjust(gain_adjust_fullrate[options.protocol])
elif not options.test and not options.protocol == 'ysf':
ENCODER.set_gain_adjust(gain_adjust[options.protocol])
nfiles = 0
if options.file1:
nfiles += 1
if options.file2 and options.protocol == 'dmr':
nfiles += 1
if nfiles < max_inputs and not options.test:
AUDIO = audio.source(options.alsa_rate, options.audio_input)
lpf_taps = filter.firdes.low_pass(1.0, options.alsa_rate, 3400.0, 3400 * 0.1, filter.firdes.WIN_HANN)
audio_rate = 8000
AUDIO_DECIM = filter.fir_filter_fff (int(options.alsa_rate / audio_rate), lpf_taps)
AUDIO_SCALE = blocks.multiply_const_ff(32767.0 * options.gain)
AUDIO_F2S = blocks.float_to_short()
self.connect(AUDIO, AUDIO_DECIM, AUDIO_SCALE, AUDIO_F2S)
if options.file1:
IN1 = blocks.file_source(gr.sizeof_short, options.file1, options.repeat)
S2F1 = blocks.short_to_float()
AMP1 = blocks.multiply_const_ff(options.gain)
F2S1 = blocks.float_to_short()
self.connect(IN1, S2F1, AMP1, F2S1, ENCODER)
elif not options.test:
self.connect(AUDIO_F2S, ENCODER)
if options.protocol == 'dmr':
if options.file2:
IN2 = blocks.file_source(gr.sizeof_short, options.file2, options.repeat)
S2F2 = blocks.short_to_float()
AMP2 = blocks.multiply_const_ff(options.gain)
F2S2 = blocks.float_to_short()
self.connect(IN2, S2F2, AMP2, F2S2, ENCODER2)
else:
self.connect(AUDIO_F2S, ENCODER2)
MOD = p25_mod_bf(output_sample_rate = options.modulator_rate, dstar = (options.protocol == 'dstar'), bt = options.bt, rc = RC_FILTER[options.protocol])
AMP = blocks.multiply_const_ff(output_gain)
if options.output_file:
OUT = blocks.file_sink(gr.sizeof_float, options.output_file)
elif not options.args:
OUT = audio.sink(options.alsa_rate, options.audio_output)
if options.symbol_sink:
SYMBOL_SINK = blocks.file_sink(gr.sizeof_char, options.symbol_sink)
if options.protocol == 'dmr' and not options.test:
self.connect(DMR, MOD)
if options.symbol_sink:
self.connect(DMR, SYMBOL_SINK)
else:
self.connect(ENCODER, MOD)
if options.symbol_sink:
self.connect(ENCODER, SYMBOL_SINK)
if options.args:
f1 = float(options.if_rate) / options.modulator_rate
i1 = int(options.if_rate / options.modulator_rate)
if f1 - i1 > 1e-3:
print '*** Error, sdr rate %d not an integer multiple of modulator rate %d - ratio=%f' % (options.if_rate, options.modulator_rate, f1)
sys.exit(1)
self.setup_sdr_output(options, mod_adjust[options.protocol])
interp = filter.rational_resampler_fff(options.if_rate / options.modulator_rate, 1)
self.connect(MOD, AMP, interp, self.fm_modulator, self.u)
else:
self.connect(MOD, AMP, OUT)
def setup_sdr_output(self, options, adjustment):
import osmosdr
max_dev = 12.5e3
k = 2 * math.pi * max_dev / options.if_rate
self.fm_modulator = analog.frequency_modulator_fc (k * adjustment)
self.u = osmosdr.sink (options.args)
gain_names = self.u.get_gain_names()
for name in gain_names:
range = self.u.get_gain_range(name)
print "gain: name: %s range: start %d stop %d step %d" % (name, range[0].start(), range[0].stop(), range[0].step())
if options.gains:
for tuple in options.gains.split(","):
name, gain = tuple.split(":")
gain = int(gain)
print "setting gain %s to %d" % (name, gain)
self.u.set_gain(gain, name)
self.u.set_sample_rate(options.if_rate)
self.u.set_center_freq(options.frequency)
self.u.set_freq_corr(options.frequency_correction)
#self.u.set_bandwidth(options.if_rate)
if __name__ == "__main__":
print 'Multiprotocol Digital Voice TX (C) Copyright 2017 Max H. Parke KA1RBI'
try:
my_top_block().run()
except KeyboardInterrupt:
tb.stop()
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