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file_to_wav.py
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#!/usr/bin/python
# Copyright 2019,2020 Radiocapture LLC - Radiocapture.com
from gnuradio import gr, analog, filter, blocks
try:
from gnuradio.gr import firdes
except:
from gnuradio.filter import firdes
import string
import sys
import time, datetime
import os
import random
import threading
import uuid
#import gnuradio.extras as gr_extras
try:
import dsd
except:
pass
from optparse import OptionParser
from gnuradio.eng_option import eng_option
from math import pi
#from gnuradio import repeater, op25
import op25
import op25_repeater as repeater
#from ID3 import *
class file_to_wav(gr.top_block):
def __init__(self,infile, outfile, input_rate, channel_rate, codec_provoice, codec_p25, sslevel, svlevel):
gr.top_block.__init__(self, "Top Block")
self.input_rate = input_rate
self.channel_rate = channel_rate
self.source = blocks.file_source(gr.sizeof_gr_complex*1, infile, False)
self.lp1_decim = int(input_rate/(channel_rate*1.6))
print self.lp1_decim
self.lp1 = filter.fir_filter_ccc(self.lp1_decim,firdes.low_pass( 1.0, self.input_rate, (self.channel_rate/2), ((self.channel_rate/2)*0.6), firdes.WIN_HAMMING))
#self.audiodemod = gr.quadrature_demod_cf(1)
audio_pass = (input_rate/self.lp1_decim)*0.25
audio_stop = audio_pass+2000
self.audiodemod = analog.fm_demod_cf(channel_rate=(input_rate/self.lp1_decim), audio_decim=1, deviation=15000, audio_pass=audio_pass, audio_stop=audio_stop, gain=8, tau=75e-6)
self.throttle = blocks.throttle(gr.sizeof_gr_complex*1, self.input_rate)
self.signal_squelch = analog.pwr_squelch_cc(sslevel,0.01, 0, True)
self.vox_squelch = analog.pwr_squelch_ff(svlevel, 0.0005, 0, True)
self.audiosink = blocks.wavfile_sink(outfile, 1, 8000)
if codec_provoice:
self.dsd = dsd.block_ff(dsd.dsd_FRAME_PROVOICE,dsd.dsd_MOD_AUTO_SELECT,1,0,False)
channel_rate = input_rate/self.lp1_decim
self.resampler_in = filter.rational_resampler_fff(interpolation=48000, decimation=channel_rate, taps=None, fractional_bw=None, )
output_rate = 8000
resampler = filter.rational_resampler_fff(
interpolation=(input_rate/self.lp1_decim),
decimation=output_rate,
taps=None,
fractional_bw=None,
)
elif codec_p25:
symbol_deviation = 600.0
symbol_rate = 4800
channel_rate = input_rate/self.lp1_decim
fm_demod_gain = channel_rate / (2.0 * pi * symbol_deviation)
fm_demod = analog.quadrature_demod_cf(fm_demod_gain)
symbol_decim = 1
samples_per_symbol = channel_rate // symbol_rate
symbol_coeffs = (1.0/samples_per_symbol,) * samples_per_symbol
symbol_filter = filter.fir_filter_fff(symbol_decim, symbol_coeffs)
autotuneq = gr.msg_queue(2)
demod_fsk4 = op25.fsk4_demod_ff(autotuneq, channel_rate, symbol_rate)
# symbol slicer
levels = [ -2.0, 0.0, 2.0, 4.0 ]
slicer = op25.fsk4_slicer_fb(levels)
imbe = repeater.vocoder(False, True, 0, "", 0, False)
self.decodequeue = decodequeue = gr.msg_queue(10000)
decoder = repeater.p25_frame_assembler('', 0, 0, True, True, False, decodequeue)
float_conversion = blocks.short_to_float(1, 8192)
resampler = filter.rational_resampler_fff(
interpolation=8000,
decimation=8000,
taps=None,
fractional_bw=None,
)
#Tone squelch, custom GRC block that rips off CTCSS squelch to detect 4800 hz tone and latch squelch after that
if not codec_provoice and not codec_p25:
#self.tone_squelch = gr.tone_squelch_ff(audiorate, 4800.0, 0.05, 300, 0, True)
#tone squelch is EDACS ONLY
self.high_pass = filter.fir_filter_fff(1, firdes.high_pass(1, (input_rate/self.lp1_decim), 300, 30, firdes.WIN_HAMMING, 6.76))
#output_rate = channel_rate
resampler = filter.rational_resampler_fff(
interpolation=8000,
decimation=(input_rate/self.lp1_decim),
taps=None,
fractional_bw=None,
)
if(codec_provoice):
self.connect(self.source, self.throttle, self.lp1, self.audiodemod, self.resampler_in, self.dsd, self.audiosink)
elif(codec_p25):
self.connect(self.source, self.throttle, self.lp1, fm_demod, symbol_filter, demod_fsk4, slicer, decoder, imbe, float_conversion, resampler, self.audiosink)
else:
self.connect(self.source, self.throttle, self.lp1, self.signal_squelch, self.audiodemod, self.high_pass, self.vox_squelch, resampler, self.audiosink)
self.time_open = time.time()
self.time_tone = 0
self.time_activity = 0
def upload_and_cleanup(self, filename, time_open, uuid, cdr, filepath):
if(time_open == 0): raise RuntimeError("upload_and_cleanup() with time_open == 0")
time.sleep(2)
os.system('nice -n 19 lame --silent ' + filename + ' 2>&1 >/dev/null')
try:
os.makedirs('/nfs/%s' % (filepath, ))
except:
pass
#try:
# id3info = ID3('%s' % (filepath + uuid + '.mp3', ))
# id3info['TITLE'] = str(cdr['type']) + ' ' + str(cdr['system_group_local'])
# id3info['ARTIST'] = str(cdr['system_user_local'])
# id3info['ALBUM'] = str(cdr['system'])
# id3info['COMMENT'] = '%s,%s' % (cdr['system_frequency'],cdr['timestamp'])
# id3info.write()
#except InvalidTagError, msg:
# print "Invalid ID3 tag:", msg
now = datetime.datetime.now()
#try:
# os.remove(filename)
#except:
# print 'Error removing ' + filename
def close(self, upload=True, emergency=False):
if(not self.in_use): raise RuntimeError('attempted to close() a logging receiver not in_use')
print "(%s) %s %s" %(time.time(), "Close ", str(self.cdr))
self.mute()
if(self.audio_capture):
self.audiosink.close()
if(upload):
_thread_0 = threading.Thread(target=self.upload_and_cleanup,args=[self.filename, self.time_open, self.uuid, self.cdr, self.filepath])
_thread_0.daemon = True
_thread_0.start()
else:
try:
os.remove(self.filename)
except:
print 'Error removing ' +self.filename
self.set_tgid(0)
self.call_id = 0
self.time_open = 0
self.in_use = False
self.uuid =''
self.cdr = {}
if __name__ == '__main__':
parser = OptionParser(option_class=eng_option)
parser.add_option("-i", "--input", dest="input_file", help="Input Filename [.dat]")
parser.add_option("-o", "--output", dest="output_file", help="Output Filename [.wav]")
parser.add_option("-r", "--input_rate", dest="rate", help="Audio Rate (in samples/sec)")
parser.add_option("-c", "--channel_rate", dest="channel_rate", help="Audio Rate (in samples/sec)")
parser.add_option("-p", "--provoice", dest="codec_provoice", action="store_true", default=False, help="ProVoice decoding (DSD)")
parser.add_option("-5", "--p25", dest="codec_p25", action="store_true", default=False, help="P25 Codec decoding (DSD)")
parser.add_option("-s", "--signal_squelch", dest='sslevel', default=-50, help='Signal Squelch level (dB)')
parser.add_option('-v', '--vox_squelch', dest='svlevel', default=-50, help='Vox Squelch level (dB)')
(options, args) = parser.parse_args()
if len(args) != 0 or options.input_file == None:
parser.print_help()
sys.exit(1)
if options.output_file == None:
if options.input_file[-4:] == '.dat':
options.output_file = options.input_file[:-4] + ".wav"
else:
options.output_file = options.input_file + ".wav"
if options.rate == None:
options.rate = 100000
else:
options.rate = int(options.rate)
if options.channel_rate == None:
options.channel_rate = 12500
else:
options.channel_rate = int(options.channel_rate)
options.sslevel = int(options.sslevel)
options.svlevel = int(options.svlevel)
tb = file_to_wav(options.input_file, options.output_file, options.rate, options.channel_rate, options.codec_provoice, options.codec_p25, options.sslevel, options.svlevel)
tb.start()
tb.wait()
time.sleep(1)
tb.audiosink.close()