stabilize dsp operation with a lock
This commit is contained in:
Jakob Ketterl
parent
f5d9306c37
commit
bd7cd01359
108
csdr.py
108
csdr.py
@ -23,9 +23,7 @@ OpenWebRX csdr plugin: do the signal processing with csdr
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import subprocess
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import time
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import os
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import code
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import signal
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import fcntl
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import threading
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class dsp:
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@ -62,6 +60,7 @@ class dsp:
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self.pipe_names=["bpf_pipe", "shift_pipe", "squelch_pipe", "smeter_pipe", "iqtee_pipe", "iqtee2_pipe"]
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self.secondary_pipe_names=["secondary_shift_pipe"]
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self.secondary_offset_freq = 1000
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self.modification_lock = threading.Lock()
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def chain(self,which):
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any_chain_base="nc -v 127.0.0.1 {nc_port} | "
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@ -127,7 +126,7 @@ class dsp:
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return 31.25
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def start_secondary_demodulator(self):
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if(not self.secondary_demodulator): return
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if not self.secondary_demodulator: return
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print("[openwebrx] starting secondary demodulator from IF input sampled at %d"%self.if_samp_rate())
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secondary_command_fft=self.secondary_chain("fft")
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secondary_command_demod=self.secondary_chain(self.secondary_demodulator)
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@ -151,7 +150,6 @@ class dsp:
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print("[openwebrx-dsp-plugin:csdr] secondary command (fft) =", secondary_command_fft)
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print("[openwebrx-dsp-plugin:csdr] secondary command (demod) =", secondary_command_demod)
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#code.interact(local=locals())
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my_env=os.environ.copy()
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#if self.csdr_dynamic_bufsize: my_env["CSDR_DYNAMIC_BUFSIZE_ON"]="1";
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if self.csdr_print_bufsizes: my_env["CSDR_PRINT_BUFSIZES"]="1";
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@ -179,8 +177,18 @@ class dsp:
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def stop_secondary_demodulator(self):
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if self.secondary_processes_running == False: return
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self.try_delete_pipes(self.secondary_pipe_names)
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if self.secondary_process_fft: os.killpg(os.getpgid(self.secondary_process_fft.pid), signal.SIGTERM)
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if self.secondary_process_demod: os.killpg(os.getpgid(self.secondary_process_demod.pid), signal.SIGTERM)
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if self.secondary_process_fft:
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try:
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os.killpg(os.getpgid(self.secondary_process_fft.pid), signal.SIGTERM)
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except ProcessLookupError:
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# been killed by something else, ignore
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pass
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if self.secondary_process_demod:
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try:
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os.killpg(os.getpgid(self.secondary_process_demod.pid), signal.SIGTERM)
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except ProcessLookupError:
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# been killed by something else, ignore
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pass
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self.secondary_processes_running = False
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def read_secondary_demod(self, size):
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@ -235,8 +243,9 @@ class dsp:
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self.calculate_decimation()
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def set_demodulator(self,demodulator):
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#to change this, restart is required
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if (self.demodulator == demodulator): return
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self.demodulator=demodulator
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self.restart()
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def get_demodulator(self):
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return self.demodulator
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@ -260,15 +269,19 @@ class dsp:
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def set_offset_freq(self,offset_freq):
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self.offset_freq=offset_freq
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if self.running:
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self.modification_lock.acquire()
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self.shift_pipe_file.write("%g\n"%(-float(self.offset_freq)/self.samp_rate))
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self.shift_pipe_file.flush()
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self.modification_lock.release()
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def set_bpf(self,low_cut,high_cut):
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self.low_cut=low_cut
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self.high_cut=high_cut
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if self.running:
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self.modification_lock.acquire()
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self.bpf_pipe_file.write( "%g %g\n"%(float(self.low_cut)/self.if_samp_rate(), float(self.high_cut)/self.if_samp_rate()) )
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self.bpf_pipe_file.flush()
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self.modification_lock.release()
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def get_bpf(self):
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return [self.low_cut, self.high_cut]
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@ -276,8 +289,10 @@ class dsp:
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def set_squelch_level(self, squelch_level):
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self.squelch_level=squelch_level
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if self.running:
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self.modification_lock.acquire()
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self.squelch_pipe_file.write( "%g\n"%(float(self.squelch_level)) )
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self.squelch_pipe_file.flush()
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self.modification_lock.release()
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def get_smeter_level(self):
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if self.running:
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@ -317,36 +332,19 @@ class dsp:
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except Exception as e: print("[openwebrx-dsp-plugin:csdr] try_delete_pipes() ::", e)
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def start(self):
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if (self.running): return
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self.modification_lock.acquire()
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if (self.running):
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self.modification_lock.release()
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return
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self.running = True
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command_base=self.chain(self.demodulator)
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#create control pipes for csdr
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self.pipe_base_path="/tmp/openwebrx_pipe_{myid}_".format(myid=id(self))
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# self.bpf_pipe = self.shift_pipe = self.squelch_pipe = self.smeter_pipe = None
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self.try_create_pipes(self.pipe_names, command_base)
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# if "{bpf_pipe}" in command_base:
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# self.bpf_pipe=pipe_base_path+"bpf"
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# self.mkfifo(self.bpf_pipe)
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# if "{shift_pipe}" in command_base:
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# self.shift_pipe=pipe_base_path+"shift"
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# self.mkfifo(self.shift_pipe)
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# if "{squelch_pipe}" in command_base:
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# self.squelch_pipe=pipe_base_path+"squelch"
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# self.mkfifo(self.squelch_pipe)
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# if "{smeter_pipe}" in command_base:
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# self.smeter_pipe=pipe_base_path+"smeter"
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# self.mkfifo(self.smeter_pipe)
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# if "{iqtee_pipe}" in command_base:
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# self.iqtee_pipe=pipe_base_path+"iqtee"
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# self.mkfifo(self.iqtee_pipe)
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# if "{iqtee2_pipe}" in command_base:
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# self.iqtee2_pipe=pipe_base_path+"iqtee2"
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# self.mkfifo(self.iqtee2_pipe)
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#run the command
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command=command_base.format( bpf_pipe=self.bpf_pipe, shift_pipe=self.shift_pipe, decimation=self.decimation, \
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last_decimation=self.last_decimation, fft_size=self.fft_size, fft_block_size=self.fft_block_size(), fft_averages=self.fft_averages, \
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@ -355,7 +353,6 @@ class dsp:
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squelch_pipe=self.squelch_pipe, smeter_pipe=self.smeter_pipe, iqtee_pipe=self.iqtee_pipe, iqtee2_pipe=self.iqtee2_pipe )
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print("[openwebrx-dsp-plugin:csdr] Command =",command)
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#code.interact(local=locals())
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my_env=os.environ.copy()
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if self.csdr_dynamic_bufsize: my_env["CSDR_DYNAMIC_BUFSIZE_ON"]="1";
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if self.csdr_print_bufsizes: my_env["CSDR_PRINT_BUFSIZES"]="1";
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@ -364,30 +361,39 @@ class dsp:
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def watch_thread():
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rc = self.process.wait()
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print("dsp thread ended with rc={0}".format(rc))
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if (self.running):
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if (rc == 0 and self.running and not self.modification_lock.locked()):
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print("restarting since rc = 0, self.running = true, and no modification")
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self.restart()
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threading.Thread(target = watch_thread).start()
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#open control pipes for csdr and send initialization data
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# open control pipes for csdr
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if self.bpf_pipe != None:
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self.bpf_pipe_file=open(self.bpf_pipe,"w")
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self.set_bpf(self.low_cut,self.high_cut)
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if self.shift_pipe != None:
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if self.shift_pipe:
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self.shift_pipe_file=open(self.shift_pipe,"w")
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self.set_offset_freq(self.offset_freq)
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if self.squelch_pipe != None:
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if self.squelch_pipe:
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self.squelch_pipe_file=open(self.squelch_pipe,"w")
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self.set_squelch_level(self.squelch_level)
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if self.smeter_pipe != None:
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self.smeter_pipe_file=open(self.smeter_pipe,"r")
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self.start_secondary_demodulator()
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self.modification_lock.release()
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# send initial config through the pipes
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if self.squelch_pipe:
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self.set_squelch_level(self.squelch_level)
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if self.shift_pipe:
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self.set_offset_freq(self.offset_freq)
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if self.bpf_pipe:
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self.set_bpf(self.low_cut, self.high_cut)
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if self.smeter_pipe:
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self.smeter_pipe_file=open(self.smeter_pipe,"r")
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def read(self,size):
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return self.process.stdout.read(size)
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def stop(self):
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self.modification_lock.acquire()
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self.running = False
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if hasattr(self, "process"):
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try:
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@ -396,34 +402,10 @@ class dsp:
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# been killed by something else, ignore
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pass
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self.stop_secondary_demodulator()
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#if(self.process.poll()!=None):return # returns None while subprocess is running
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#while(self.process.poll()==None):
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# #self.process.kill()
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# print "killproc",os.getpgid(self.process.pid),self.process.pid
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# os.killpg(self.process.pid, signal.SIGTERM)
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#
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# time.sleep(0.1)
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self.try_delete_pipes(self.pipe_names)
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# if self.bpf_pipe:
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# try: os.unlink(self.bpf_pipe)
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# except: print "[openwebrx-dsp-plugin:csdr] stop() :: unlink failed: " + self.bpf_pipe
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# if self.shift_pipe:
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# try: os.unlink(self.shift_pipe)
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# except: print "[openwebrx-dsp-plugin:csdr] stop() :: unlink failed: " + self.shift_pipe
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# if self.squelch_pipe:
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# try: os.unlink(self.squelch_pipe)
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# except: print "[openwebrx-dsp-plugin:csdr] stop() :: unlink failed: " + self.squelch_pipe
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# if self.smeter_pipe:
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# try: os.unlink(self.smeter_pipe)
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# except: print "[openwebrx-dsp-plugin:csdr] stop() :: unlink failed: " + self.smeter_pipe
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# if self.iqtee_pipe:
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# try: os.unlink(self.iqtee_pipe)
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# except: print "[openwebrx-dsp-plugin:csdr] stop() :: unlink failed: " + self.iqtee_pipe
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# if self.iqtee2_pipe:
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# try: os.unlink(self.iqtee2_pipe)
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# except: print "[openwebrx-dsp-plugin:csdr] stop() :: unlink failed: " + self.iqtee2_pipe
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self.modification_lock.release()
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def restart(self):
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if not self.running: return
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@ -29,7 +29,7 @@ class RtlNmuxSource(object):
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)
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def restart(name, value):
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print("would now restart rtl source due to property change: {0} changed to {1}".format(name, value))
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print("restarting rtl source due to property change: {0} changed to {1}".format(name, value))
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self.stop()
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self.start()
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props.wire(restart)
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@ -171,7 +171,6 @@ class DspManager(object):
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self.dsp.csdr_through = self.localProps["csdr_through"]
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self.localProps.getProperty("samp_rate").wire(self.dsp.set_samp_rate)
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#do_secondary_demod=False
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self.localProps.getProperty("output_rate").wire(self.dsp.set_output_rate)
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self.localProps.getProperty("offset_freq").wire(self.dsp.set_offset_freq)
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@ -189,12 +188,7 @@ class DspManager(object):
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self.dsp.set_bpf(*bpf)
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self.localProps.getProperty("high_cut").wire(set_high_cut)
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def set_mod(mod):
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if (self.dsp.get_demodulator() == mod): return
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self.dsp.stop()
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self.dsp.set_demodulator(mod)
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self.dsp.start()
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self.localProps.getProperty("mod").wire(set_mod)
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self.localProps.getProperty("mod").wire(self.dsp.set_demodulator)
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if (self.localProps["digimodes_enable"]):
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def set_secondary_mod(mod):
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@ -202,10 +196,8 @@ class DspManager(object):
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if self.dsp.get_secondary_demodulator() == mod: return
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self.stopSecondaryThreads()
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self.dsp.stop()
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if mod is None:
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self.dsp.set_secondary_demodulator(None)
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else:
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self.dsp.set_secondary_demodulator(mod)
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if mod is not None:
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self.handler.write_secondary_dsp_config({
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"secondary_fft_size":self.localProps["digimodes_fft_size"],
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"if_samp_rate":self.dsp.if_samp_rate(),
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