Retabbed python code and added secondary demodulators

This commit is contained in:
ha7ilm 2017-05-02 15:12:14 +02:00
parent ffe141f2a0
commit 2b11e0f94a
2 changed files with 336 additions and 194 deletions

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@ -2,9 +2,9 @@
print "" # python2.7 is required to run OpenWebRX instead of python3. Please run me by: python2 openwebrx.py print "" # python2.7 is required to run OpenWebRX instead of python3. Please run me by: python2 openwebrx.py
""" """
This file is part of OpenWebRX, This file is part of OpenWebRX,
an open-source SDR receiver software with a web UI. an open-source SDR receiver software with a web UI.
Copyright (c) 2013-2015 by Andras Retzler <randras@sdr.hu> Copyright (c) 2013-2015 by Andras Retzler <randras@sdr.hu>
This program is free software: you can redistribute it and/or modify This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as it under the terms of the GNU Affero General Public License as

524
plugins/dsp/csdr/plugin.py Normal file → Executable file
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@ -1,9 +1,9 @@
""" """
OpenWebRX csdr plugin: do the signal processing with csdr OpenWebRX csdr plugin: do the signal processing with csdr
This file is part of OpenWebRX, This file is part of OpenWebRX,
an open-source SDR receiver software with a web UI. an open-source SDR receiver software with a web UI.
Copyright (c) 2013-2015 by Andras Retzler <randras@sdr.hu> Copyright (c) 2013-2015 by Andras Retzler <randras@sdr.hu>
This program is free software: you can redistribute it and/or modify This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as it under the terms of the GNU Affero General Public License as
@ -29,223 +29,365 @@ import fcntl
class dsp_plugin: class dsp_plugin:
def __init__(self): def __init__(self):
self.samp_rate = 250000 self.samp_rate = 250000
self.output_rate = 11025 #this is default, and cannot be set at the moment self.output_rate = 11025 #this is default, and cannot be set at the moment
self.fft_size = 1024 self.fft_size = 1024
self.fft_fps = 5 self.fft_fps = 5
self.offset_freq = 0 self.offset_freq = 0
self.low_cut = -4000 self.low_cut = -4000
self.high_cut = 4000 self.high_cut = 4000
self.bpf_transition_bw = 320 #Hz, and this is a constant self.bpf_transition_bw = 320 #Hz, and this is a constant
self.ddc_transition_bw_rate = 0.15 # of the IF sample rate self.ddc_transition_bw_rate = 0.15 # of the IF sample rate
self.running = False self.running = False
self.audio_compression = "none" self.secondary_processes_running = False
self.fft_compression = "none" self.audio_compression = "none"
self.demodulator = "nfm" self.fft_compression = "none"
self.name = "csdr" self.demodulator = "nfm"
self.format_conversion = "csdr convert_u8_f" self.name = "csdr"
self.base_bufsize = 512 self.format_conversion = "csdr convert_u8_f"
self.nc_port = 4951 self.base_bufsize = 512
self.csdr_dynamic_bufsize = False self.nc_port = 4951
self.csdr_print_bufsizes = False self.csdr_dynamic_bufsize = False
self.csdr_through = False self.csdr_print_bufsizes = False
self.squelch_level = 0 self.csdr_through = False
self.fft_averages = 50 self.squelch_level = 0
self.fft_averages = 50
self.iqtee = False
self.iqtee2 = False
self.secondary_demodulator = None
self.secondary_fft_size = 1024
self.secondary_process_fft = None
self.secondary_process_demod = None
self.pipe_names=["bpf_pipe", "shift_pipe", "squelch_pipe", "smeter_pipe", "iqtee_pipe", "iqtee2_pipe"]
self.secondary_pipe_names=["secondary_shift_pipe"]
def chain(self,which): def chain(self,which):
any_chain_base="nc -v 127.0.0.1 {nc_port} | " any_chain_base="nc -v 127.0.0.1 {nc_port} | "
if self.csdr_dynamic_bufsize: any_chain_base+="csdr setbuf {start_bufsize} | " if self.csdr_dynamic_bufsize: any_chain_base+="csdr setbuf {start_bufsize} | "
if self.csdr_through: any_chain_base+="csdr through | " if self.csdr_through: any_chain_base+="csdr through | "
any_chain_base+=self.format_conversion+(" | " if self.format_conversion!="" else "") ##"csdr flowcontrol {flowcontrol} auto 1.5 10 | " any_chain_base+=self.format_conversion+(" | " if self.format_conversion!="" else "") ##"csdr flowcontrol {flowcontrol} auto 1.5 10 | "
if which == "fft": if which == "fft":
fft_chain_base = any_chain_base+"csdr fft_cc {fft_size} {fft_block_size} | " + \ fft_chain_base = any_chain_base+"csdr fft_cc {fft_size} {fft_block_size} | " + \
("csdr logpower_cf -70 | " if self.fft_averages == 0 else "csdr logaveragepower_cf -70 {fft_size} {fft_averages} | ") + \ ("csdr logpower_cf -70 | " if self.fft_averages == 0 else "csdr logaveragepower_cf -70 {fft_size} {fft_averages} | ") + \
"csdr fft_exchange_sides_ff {fft_size}" "csdr fft_exchange_sides_ff {fft_size}"
if self.fft_compression=="adpcm": if self.fft_compression=="adpcm":
return fft_chain_base+" | csdr compress_fft_adpcm_f_u8 {fft_size}" return fft_chain_base+" | csdr compress_fft_adpcm_f_u8 {fft_size}"
else: else:
return fft_chain_base return fft_chain_base
chain_begin=any_chain_base+"csdr shift_addition_cc --fifo {shift_pipe} | csdr fir_decimate_cc {decimation} {ddc_transition_bw} HAMMING | csdr bandpass_fir_fft_cc --fifo {bpf_pipe} {bpf_transition_bw} HAMMING | csdr squelch_and_smeter_cc --fifo {squelch_pipe} --outfifo {smeter_pipe} 5 1 | " chain_begin=any_chain_base+"csdr shift_addition_cc --fifo {shift_pipe} | csdr fir_decimate_cc {decimation} {ddc_transition_bw} HAMMING | csdr bandpass_fir_fft_cc --fifo {bpf_pipe} {bpf_transition_bw} HAMMING | csdr squelch_and_smeter_cc --fifo {squelch_pipe} --outfifo {smeter_pipe} 5 1 | "
chain_end = "" if self.secondary_demodulator:
if self.audio_compression=="adpcm": chain_begin+="tee {iqtee_pipe} | "
chain_end = " | csdr encode_ima_adpcm_i16_u8" chain_begin+="tee {iqtee_pipe2} | "
if which == "nfm": return chain_begin + "csdr fmdemod_quadri_cf | csdr limit_ff | csdr old_fractional_decimator_ff {last_decimation} | csdr deemphasis_nfm_ff 11025 | csdr fastagc_ff 1024 | csdr convert_f_s16"+chain_end chain_end = ""
elif which == "am": return chain_begin + "csdr amdemod_cf | csdr fastdcblock_ff | csdr old_fractional_decimator_ff {last_decimation} | csdr agc_ff | csdr limit_ff | csdr convert_f_s16"+chain_end if self.audio_compression=="adpcm":
elif which == "ssb": return chain_begin + "csdr realpart_cf | csdr old_fractional_decimator_ff {last_decimation} | csdr agc_ff | csdr limit_ff | csdr convert_f_s16"+chain_end chain_end = " | csdr encode_ima_adpcm_i16_u8"
if which == "nfm": return chain_begin + "csdr fmdemod_quadri_cf | csdr limit_ff | csdr old_fractional_decimator_ff {last_decimation} | csdr deemphasis_nfm_ff 11025 | csdr fastagc_ff 1024 | csdr convert_f_s16"+chain_end
elif which == "am": return chain_begin + "csdr amdemod_cf | csdr fastdcblock_ff | csdr old_fractional_decimator_ff {last_decimation} | csdr agc_ff | csdr limit_ff | csdr convert_f_s16"+chain_end
elif which == "ssb": return chain_begin + "csdr realpart_cf | csdr old_fractional_decimator_ff {last_decimation} | csdr agc_ff | csdr limit_ff | csdr convert_f_s16"+chain_end
def set_audio_compression(self,what): def secondary_chain(self, which):
self.audio_compression = what secondary_chain_base="cat {input_pipe} | "
def set_fft_compression(self,what): if which == "fft":
self.fft_compression = what return secondary_chain_base+"csdr fft_cc {secondary_fft_size} {secondary_fft_block_size} | csdrr logpower_cf -70 | csdr fft_one_side_ff {secondary_fft_size}"
elif which == "bpsk31":
return secondary_chain_base+"""csdr dsb_fc | \
csdr shift_addition_cc {secondary_shift_pipe} | \
csdr REM fir_decimate_cc {secondary_decimation} | \
csdr bandpass_fir_fft_cc -{secondary_bpf_cutoff} {secondary_bpf_cutoff} {secondary_bpf_transition_bw} HAMMING | \
csdr simple_agc_cc 0.0001 0.5 | \
csdr matched_filter_cc COSINE 48 | \
csdr timing_recovery_cc EARLYLATE {secondary_samples_per_bits} --add_q | \
def get_fft_bytes_to_read(self): CSDR_FIXED_BUFSIZE=1 csdr realpart_cf | \
if self.fft_compression=="none": return self.fft_size*4 CSDR_FIXED_BUFSIZE=1 csdr binary_slicer_f_u8 | \
if self.fft_compression=="adpcm": return (self.fft_size/2)+(10/2) CSDR_FIXED_BUFSIZE=1 csdr differential_decoder_u8_u8 | \
CSDR_FIXED_BUFSIZE=1 csdr psk31_varicode_decoder_u8_u8
"""
def set_samp_rate(self,samp_rate): def set_secondary_demodulator(self, what):
#to change this, restart is required self.secondary_demodulator = what
self.samp_rate=samp_rate
self.decimation=1
while self.samp_rate/(self.decimation+1)>self.output_rate:
self.decimation+=1
self.last_decimation=float(self.if_samp_rate())/self.output_rate
def if_samp_rate(self): def secondary_fft_block_size(self):
return self.samp_rate/self.decimation return (self.samp_rate/self.decimation)/self.fft_fps
def get_name(self): def secondary_decimation(self, which):
return self.name return 1
def get_output_rate(self): def secondary_bpf_cutoff(self, which):
return self.output_rate if self.secondary_demodulator == "bpsk31":
return 31.25 / self.if_samp_rate()
return 0
def set_output_rate(self,output_rate): def secondary_bpf_transition_bw(self, which):
self.output_rate=output_rate if self.secondary_demodulator == "bpsk31":
self.set_samp_rate(self.samp_rate) #as it depends on output_rate return (31.25 / 2) * self.if_samp_rate()
return 0
def set_demodulator(self,demodulator): def start_secondary_demodulator(self):
#to change this, restart is required if(not self.secondary_demodulator): return
self.demodulator=demodulator secondary_command_fft=secondary_chain("fft")
secondary_command_fft=secondary_command_fft.format( \
input_pipe=self.iqtee_pipe, \
secondary_fft_size=self.secondary_fft_size, \
secondary_fft_block_size=self.secondary_fft_block_size(), \
)
secondary_command_demod=self.secondary_chain(self.secondary_demodulator)
secondary_command_demod.format( \
input_pipe=self.iqtee2_pipe, \
secondary_shift_pipe=self.secondary_shift_pipe, \
secondary_decimation=self.secondary_decimation(self.secondary_demodulator), \
secondary_samples_per_bits=self.secondary_samples_per_bits(self.secondary_demodulator), \
secondary_bpf_cutoff=self.secondary_bpf_cutoff(self.secondary_demodulator), \
secondary_bpf_transition_bw=self.secondary_bpf_transition_bw(self.secondary_demodulator)
)
try_create_pipes(secondary_command_demod + secondary_command_fft, self.secondary_pipe_names)
def get_demodulator(self): print "[openwebrx-dsp-plugin:csdr] secondary command (fft) =", secondary_command_fft
return self.demodulator print "[openwebrx-dsp-plugin:csdr] secondary command (demod) =", secondary_command_demod
#code.interact(local=locals())
my_env=os.environ.copy()
#if self.csdr_dynamic_bufsize: my_env["CSDR_DYNAMIC_BUFSIZE_ON"]="1";
if self.csdr_print_bufsizes: my_env["CSDR_PRINT_BUFSIZES"]="1";
self.secondary_process_fft = subprocess.Popen(secondary_command_fft, stdout=subprocess.PIPE, shell=True, preexec_fn=os.setpgrp, env=my_env)
self.secondary_process_demod = subprocess.Popen(secondary_command_demod, stdout=subprocess.PIPE, shell=True, preexec_fn=os.setpgrp, env=my_env)
self.secondary_processes_running = True
def set_fft_size(self,fft_size): #open control pipes for csdr and send initialization data
#to change this, restart is required if self.secondary_shift_pipe != None:
self.fft_size=fft_size self.secondary_shift_pipe_file=open(self.secondary_shift_pipe,"w")
self.set_secondary_offset_freq(self.secondary_offset_freq)
def set_fft_fps(self,fft_fps): def set_secondary_offset_freq(self, value):
#to change this, restart is required self.secondary_offset_freq=value
self.fft_fps=fft_fps if self.secondary_processes_running:
self.secondary_shift_pipe_file.write("%g\n"%(-float(self.secondary_offset_freq)/self.if_samp_rate()))
self.secondary_shift_pipe_file.flush()
def set_fft_averages(self,fft_averages): def stop_secondary_demodulator(self):
#to change this, restart is required if self.secondary_processes_running == False: return
self.fft_averages=fft_averages self.try_delete_pipes(self.secondary_pipe_names)
if self.secondary_process_fft: os.killpg(os.getpgid(self.secondary_process_fft.pid), signal.SIGTERM)
if self.secondary_process_demod: os.killpg(os.getpgid(self.secondary_process_demod.pid), signal.SIGTERM)
self.secondary_processes_running = False
def fft_block_size(self): def read_secondary_demod(self, size):
if self.fft_averages == 0: return self.samp_rate/self.fft_fps return self.secondary_process_demod.stdout.read(size)
else: return self.samp_rate/self.fft_fps/self.fft_averages
def set_format_conversion(self,format_conversion): def read_secondary_fft(self, size):
self.format_conversion=format_conversion return self.secondary_process_fft.stdout.read(size)
def set_offset_freq(self,offset_freq): def set_audio_compression(self,what):
self.offset_freq=offset_freq self.audio_compression = what
if self.running:
self.shift_pipe_file.write("%g\n"%(-float(self.offset_freq)/self.samp_rate))
self.shift_pipe_file.flush()
def set_bpf(self,low_cut,high_cut): def set_fft_compression(self,what):
self.low_cut=low_cut self.fft_compression = what
self.high_cut=high_cut
if self.running:
self.bpf_pipe_file.write( "%g %g\n"%(float(self.low_cut)/self.if_samp_rate(), float(self.high_cut)/self.if_samp_rate()) )
self.bpf_pipe_file.flush()
def get_bpf(self): def get_fft_bytes_to_read(self):
return [self.low_cut, self.high_cut] if self.fft_compression=="none": return self.fft_size*4
if self.fft_compression=="adpcm": return (self.fft_size/2)+(10/2)
def set_squelch_level(self, squelch_level): def set_samp_rate(self,samp_rate):
self.squelch_level=squelch_level #to change this, restart is required
if self.running: self.samp_rate=samp_rate
self.squelch_pipe_file.write( "%g\n"%(float(self.squelch_level)) ) self.decimation=1
self.squelch_pipe_file.flush() while self.samp_rate/(self.decimation+1)>self.output_rate:
self.decimation+=1
self.last_decimation=float(self.if_samp_rate())/self.output_rate
def get_smeter_level(self): def if_samp_rate(self):
if self.running: return self.samp_rate/self.decimation
line=self.smeter_pipe_file.readline()
return float(line[:-1])
def mkfifo(self,path): def get_name(self):
try: return self.name
os.unlink(path)
except:
pass
os.mkfifo(path)
def ddc_transition_bw(self): def get_output_rate(self):
return self.ddc_transition_bw_rate*(self.if_samp_rate()/float(self.samp_rate)) return self.output_rate
def start(self): def set_output_rate(self,output_rate):
command_base=self.chain(self.demodulator) self.output_rate=output_rate
self.set_samp_rate(self.samp_rate) #as it depends on output_rate
#create control pipes for csdr def set_demodulator(self,demodulator):
pipe_base_path="/tmp/openwebrx_pipe_{myid}_".format(myid=id(self)) #to change this, restart is required
self.bpf_pipe = self.shift_pipe = self.squelch_pipe = self.smeter_pipe = None self.demodulator=demodulator
if "{bpf_pipe}" in command_base:
self.bpf_pipe=pipe_base_path+"bpf"
self.mkfifo(self.bpf_pipe)
if "{shift_pipe}" in command_base:
self.shift_pipe=pipe_base_path+"shift"
self.mkfifo(self.shift_pipe)
if "{squelch_pipe}" in command_base:
self.squelch_pipe=pipe_base_path+"squelch"
self.mkfifo(self.squelch_pipe)
if "{smeter_pipe}" in command_base:
self.smeter_pipe=pipe_base_path+"smeter"
self.mkfifo(self.smeter_pipe)
#run the command def get_demodulator(self):
command=command_base.format( bpf_pipe=self.bpf_pipe, shift_pipe=self.shift_pipe, decimation=self.decimation, \ return self.demodulator
last_decimation=self.last_decimation, fft_size=self.fft_size, fft_block_size=self.fft_block_size(), fft_averages=self.fft_averages, \
bpf_transition_bw=float(self.bpf_transition_bw)/self.if_samp_rate(), ddc_transition_bw=self.ddc_transition_bw(), \
flowcontrol=int(self.samp_rate*2), start_bufsize=self.base_bufsize*self.decimation, nc_port=self.nc_port, \
squelch_pipe=self.squelch_pipe, smeter_pipe=self.smeter_pipe )
print "[openwebrx-dsp-plugin:csdr] Command =",command def set_fft_size(self,fft_size):
#code.interact(local=locals()) #to change this, restart is required
my_env=os.environ.copy() self.fft_size=fft_size
if self.csdr_dynamic_bufsize: my_env["CSDR_DYNAMIC_BUFSIZE_ON"]="1";
if self.csdr_print_bufsizes: my_env["CSDR_PRINT_BUFSIZES"]="1";
self.process = subprocess.Popen(command, stdout=subprocess.PIPE, shell=True, preexec_fn=os.setpgrp, env=my_env)
self.running = True
#open control pipes for csdr and send initialization data def set_fft_fps(self,fft_fps):
if self.bpf_pipe != None: #to change this, restart is required
self.bpf_pipe_file=open(self.bpf_pipe,"w") self.fft_fps=fft_fps
self.set_bpf(self.low_cut,self.high_cut)
if self.shift_pipe != None:
self.shift_pipe_file=open(self.shift_pipe,"w")
self.set_offset_freq(self.offset_freq)
if self.squelch_pipe != None:
self.squelch_pipe_file=open(self.squelch_pipe,"w")
self.set_squelch_level(self.squelch_level)
if self.smeter_pipe != None:
self.smeter_pipe_file=open(self.smeter_pipe,"r")
fcntl.fcntl(self.smeter_pipe_file, fcntl.F_SETFL, os.O_NONBLOCK)
def read(self,size): def set_fft_averages(self,fft_averages):
return self.process.stdout.read(size) #to change this, restart is required
self.fft_averages=fft_averages
def stop(self): def fft_block_size(self):
os.killpg(os.getpgid(self.process.pid), signal.SIGTERM) if self.fft_averages == 0: return self.samp_rate/self.fft_fps
#if(self.process.poll()!=None):return # returns None while subprocess is running else: return self.samp_rate/self.fft_fps/self.fft_averages
#while(self.process.poll()==None):
# #self.process.kill()
# print "killproc",os.getpgid(self.process.pid),self.process.pid
# os.killpg(self.process.pid, signal.SIGTERM)
#
# time.sleep(0.1)
if self.bpf_pipe:
try: os.unlink(self.bpf_pipe)
except: print "[openwebrx-dsp-plugin:csdr] stop() :: unlink failed: " + self.bpf_pipe
if self.shift_pipe:
try: os.unlink(self.shift_pipe)
except: print "[openwebrx-dsp-plugin:csdr] stop() :: unlink failed: " + self.shift_pipe
if self.squelch_pipe:
try: os.unlink(self.squelch_pipe)
except: print "[openwebrx-dsp-plugin:csdr] stop() :: unlink failed: " + self.squelch_pipe
if self.smeter_pipe:
try: os.unlink(self.smeter_pipe)
except: print "[openwebrx-dsp-plugin:csdr] stop() :: unlink failed: " + self.smeter_pipe
self.running = False
def restart(self): def set_format_conversion(self,format_conversion):
self.stop() self.format_conversion=format_conversion
self.start()
def __del__(self): def set_offset_freq(self,offset_freq):
self.stop() self.offset_freq=offset_freq
del(self.process) if self.running:
self.shift_pipe_file.write("%g\n"%(-float(self.offset_freq)/self.samp_rate))
self.shift_pipe_file.flush()
def set_bpf(self,low_cut,high_cut):
self.low_cut=low_cut
self.high_cut=high_cut
if self.running:
self.bpf_pipe_file.write( "%g %g\n"%(float(self.low_cut)/self.if_samp_rate(), float(self.high_cut)/self.if_samp_rate()) )
self.bpf_pipe_file.flush()
def get_bpf(self):
return [self.low_cut, self.high_cut]
def set_squelch_level(self, squelch_level):
self.squelch_level=squelch_level
if self.running:
self.squelch_pipe_file.write( "%g\n"%(float(self.squelch_level)) )
self.squelch_pipe_file.flush()
def get_smeter_level(self):
if self.running:
line=self.smeter_pipe_file.readline()
return float(line[:-1])
def mkfifo(self,path):
try:
os.unlink(path)
except:
pass
os.mkfifo(path)
def ddc_transition_bw(self):
return self.ddc_transition_bw_rate*(self.if_samp_rate()/float(self.samp_rate))
def try_create_pipes(self, pipe_names, command_base):
for pipe_name in pipe_names:
if "{"+pipe_name+"}" in command_base:
setattr(self, pipe_name, self.pipe_base_path+pipe_name)
self.mkfifo(getattr(self, pipe_name))
else:
setattr(self, pipe_name, None)
def try_delete_pipes(self, pipe_names):
for pipe_name in pipe_names:
pipe_path = getattr(self,pipe_name,None)
if pipe_path:
try: os.unlink(pipe_path)
except: print "[openwebrx-dsp-plugin:csdr] try_delete_pipes() :: unlink failed: " + pipe_path
def start(self):
command_base=self.chain(self.demodulator)
#create control pipes for csdr
self.pipe_base_path="/tmp/openwebrx_pipe_{myid}_".format(myid=id(self))
# self.bpf_pipe = self.shift_pipe = self.squelch_pipe = self.smeter_pipe = None
self.try_create_pipes(self.pipe_names, command_base)
# if "{bpf_pipe}" in command_base:
# self.bpf_pipe=pipe_base_path+"bpf"
# self.mkfifo(self.bpf_pipe)
# if "{shift_pipe}" in command_base:
# self.shift_pipe=pipe_base_path+"shift"
# self.mkfifo(self.shift_pipe)
# if "{squelch_pipe}" in command_base:
# self.squelch_pipe=pipe_base_path+"squelch"
# self.mkfifo(self.squelch_pipe)
# if "{smeter_pipe}" in command_base:
# self.smeter_pipe=pipe_base_path+"smeter"
# self.mkfifo(self.smeter_pipe)
# if "{iqtee_pipe}" in command_base:
# self.iqtee_pipe=pipe_base_path+"iqtee"
# self.mkfifo(self.iqtee_pipe)
# if "{iqtee2_pipe}" in command_base:
# self.iqtee2_pipe=pipe_base_path+"iqtee2"
# self.mkfifo(self.iqtee2_pipe)
#run the command
command=command_base.format( bpf_pipe=self.bpf_pipe, shift_pipe=self.shift_pipe, decimation=self.decimation, \
last_decimation=self.last_decimation, fft_size=self.fft_size, fft_block_size=self.fft_block_size(), fft_averages=self.fft_averages, \
bpf_transition_bw=float(self.bpf_transition_bw)/self.if_samp_rate(), ddc_transition_bw=self.ddc_transition_bw(), \
flowcontrol=int(self.samp_rate*2), start_bufsize=self.base_bufsize*self.decimation, nc_port=self.nc_port, \
squelch_pipe=self.squelch_pipe, smeter_pipe=self.smeter_pipe )
print "[openwebrx-dsp-plugin:csdr] Command =",command
#code.interact(local=locals())
my_env=os.environ.copy()
if self.csdr_dynamic_bufsize: my_env["CSDR_DYNAMIC_BUFSIZE_ON"]="1";
if self.csdr_print_bufsizes: my_env["CSDR_PRINT_BUFSIZES"]="1";
self.process = subprocess.Popen(command, stdout=subprocess.PIPE, shell=True, preexec_fn=os.setpgrp, env=my_env)
self.running = True
#open control pipes for csdr and send initialization data
if self.bpf_pipe != None:
self.bpf_pipe_file=open(self.bpf_pipe,"w")
self.set_bpf(self.low_cut,self.high_cut)
if self.shift_pipe != None:
self.shift_pipe_file=open(self.shift_pipe,"w")
self.set_offset_freq(self.offset_freq)
if self.squelch_pipe != None:
self.squelch_pipe_file=open(self.squelch_pipe,"w")
self.set_squelch_level(self.squelch_level)
if self.smeter_pipe != None:
self.smeter_pipe_file=open(self.smeter_pipe,"r")
fcntl.fcntl(self.smeter_pipe_file, fcntl.F_SETFL, os.O_NONBLOCK)
self.start_secondary_demodulator()
def read(self,size):
return self.process.stdout.read(size)
def stop(self):
os.killpg(os.getpgid(self.process.pid), signal.SIGTERM)
self.stop_secondary_demodulator()
#if(self.process.poll()!=None):return # returns None while subprocess is running
#while(self.process.poll()==None):
# #self.process.kill()
# print "killproc",os.getpgid(self.process.pid),self.process.pid
# os.killpg(self.process.pid, signal.SIGTERM)
#
# time.sleep(0.1)
self.try_delete_pipes(self.pipe_names)
# if self.bpf_pipe:
# try: os.unlink(self.bpf_pipe)
# except: print "[openwebrx-dsp-plugin:csdr] stop() :: unlink failed: " + self.bpf_pipe
# if self.shift_pipe:
# try: os.unlink(self.shift_pipe)
# except: print "[openwebrx-dsp-plugin:csdr] stop() :: unlink failed: " + self.shift_pipe
# if self.squelch_pipe:
# try: os.unlink(self.squelch_pipe)
# except: print "[openwebrx-dsp-plugin:csdr] stop() :: unlink failed: " + self.squelch_pipe
# if self.smeter_pipe:
# try: os.unlink(self.smeter_pipe)
# except: print "[openwebrx-dsp-plugin:csdr] stop() :: unlink failed: " + self.smeter_pipe
# if self.iqtee_pipe:
# try: os.unlink(self.iqtee_pipe)
# except: print "[openwebrx-dsp-plugin:csdr] stop() :: unlink failed: " + self.iqtee_pipe
# if self.iqtee2_pipe:
# try: os.unlink(self.iqtee2_pipe)
# except: print "[openwebrx-dsp-plugin:csdr] stop() :: unlink failed: " + self.iqtee2_pipe
self.running = False
def restart(self):
self.stop()
self.start()
def __del__(self):
self.stop()
del(self.process)