101 lines
4.0 KiB
Python
Executable File
101 lines
4.0 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# Copyright 2005,2006,2007 Free Software Foundation, Inc.
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#
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# GNU Radio Multichannel APCO P25 Tx (c) Copyright 2009, KA1RBI
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#
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# This file is part of GNU Radio and part of OP25
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3, or (at your option)
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# any later version.
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#
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# It is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this; see the file COPYING. If not, write to
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# the Free Software Foundation, Inc., 51 Franklin Street,
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# Boston, MA 02110-1301, USA.
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"""
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This program is used in conjunction with op25_tx.py.
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When op25_tx.py is used with its -p option (selecting UDP input),
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you should start this program beforehand, to start the data flow.
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"""
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import time
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from gnuradio import gr, gru, audio, eng_notation, blks2, optfir
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from gnuradio.eng_option import eng_option
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from optparse import OptionParser
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from gnuradio import repeater
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class app_top_block(gr.top_block):
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def __init__(self, options, queue):
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gr.top_block.__init__(self, "mhp")
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self.audio_amps = []
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self.converters = []
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self.vocoders = []
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self.output_files = []
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input_audio_rate = 8000
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self.audio_input = audio.source(input_audio_rate, options.audio_input)
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for i in range (options.nchannels):
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udp_port = options.udp_port + i
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if options.output_files:
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t = gr.file_sink(gr.sizeof_char, "baseband-%d.dat" % i)
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self.output_files.append(t)
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udp_port = 0
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t = gr.multiply_const_ff(32767 * options.audio_gain)
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self.audio_amps.append(t)
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t = gr.float_to_short()
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self.converters.append(t)
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t = repeater.vocoder(True, # 0=Decode,True=Encode
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options.verbose, # Verbose flag
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options.stretch, # flex amount
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options.udp_addr, # udp ip address
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udp_port, # udp port or zero
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False) # dump raw u vectors
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self.vocoders.append(t)
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for i in range (options.nchannels):
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self.connect((self.audio_input, i), self.audio_amps[i], self.converters[i], self.vocoders[i])
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if options.output_files:
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self.connect(self.vocoders[i], self.output_files[i])
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def main():
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parser = OptionParser(option_class=eng_option)
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parser.add_option("-a", "--udp-addr", type="string", default="127.0.0.1", help="destination host IP address")
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parser.add_option("-g", "--audio-gain", type="eng_float", default=1.0, help="gain factor")
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parser.add_option("-n", "--nchannels", type="int", default=2, help="number of audio channels")
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parser.add_option("-o", "--output-files", action="store_true", default=False, help="write P25 symbols to output files instead of UDP")
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parser.add_option("-p", "--udp-port", type="int", default=2525, help="destination host port")
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parser.add_option("-v", "--verbose", action="store_true", default=False, help="dump demodulation data")
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parser.add_option("-I", "--audio-input", type="string", default="", help="pcm input device name. E.g., hw:0,0 or /dev/dsp")
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parser.add_option("-S", "--stretch", type="int", default=0)
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(options, args) = parser.parse_args()
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queue = gr.msg_queue()
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tb = app_top_block(options, queue)
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try:
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tb.start()
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while 1:
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time.sleep(1)
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if not queue.empty_p():
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sys.stderr.write("main: q.delete_head()\n")
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msg = queue.delete_head()
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except KeyboardInterrupt:
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tb.stop()
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if __name__ == "__main__":
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main()
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