openwebrx-clone/owrx/source.py

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2019-05-04 18:26:11 +00:00
import subprocess
from owrx.config import PropertyManager
import threading
import csdr
import time
class RtlNmuxSource(object):
def __init__(self):
pm = PropertyManager.getSharedInstance()
nmux_bufcnt = nmux_bufsize = 0
while nmux_bufsize < pm.getPropertyValue("samp_rate")/4: nmux_bufsize += 4096
while nmux_bufsize * nmux_bufcnt < pm.getPropertyValue("nmux_memory") * 1e6: nmux_bufcnt += 1
if nmux_bufcnt == 0 or nmux_bufsize == 0:
print("[openwebrx-main] Error: nmux_bufsize or nmux_bufcnt is zero. These depend on nmux_memory and samp_rate options in config_webrx.py")
return
print("[openwebrx-main] nmux_bufsize = %d, nmux_bufcnt = %d" % (nmux_bufsize, nmux_bufcnt))
cmd = pm.getPropertyValue("start_rtl_command") + "| nmux --bufsize %d --bufcnt %d --port %d --address 127.0.0.1" % (nmux_bufsize, nmux_bufcnt, pm.getPropertyValue("iq_server_port"))
subprocess.Popen(cmd, shell=True)
print("[openwebrx-main] Started rtl source: " + cmd)
class SpectrumThread(threading.Thread):
sharedInstance = None
@staticmethod
def getSharedInstance():
if SpectrumThread.sharedInstance is None:
SpectrumThread.sharedInstance = SpectrumThread()
SpectrumThread.sharedInstance.start()
return SpectrumThread.sharedInstance
def __init__(self):
self.clients = []
self.doRun = True
super().__init__()
def run(self):
pm = PropertyManager.getSharedInstance()
samp_rate = pm.getPropertyValue("samp_rate")
fft_size = pm.getPropertyValue("fft_size")
fft_fps = pm.getPropertyValue("fft_fps")
fft_voverlap_factor = pm.getPropertyValue("fft_voverlap_factor")
fft_compression = pm.getPropertyValue("fft_compression")
format_conversion = pm.getPropertyValue("format_conversion")
spectrum_dsp=dsp=csdr.dsp()
dsp.nc_port = pm.getPropertyValue("iq_server_port")
dsp.set_demodulator("fft")
dsp.set_samp_rate(samp_rate)
dsp.set_fft_size(fft_size)
dsp.set_fft_fps(fft_fps)
dsp.set_fft_averages(int(round(1.0 * samp_rate / fft_size / fft_fps / (1.0 - fft_voverlap_factor))) if fft_voverlap_factor>0 else 0)
dsp.set_fft_compression(fft_compression)
dsp.set_format_conversion(format_conversion)
dsp.csdr_dynamic_bufsize = pm.getPropertyValue("csdr_dynamic_bufsize")
dsp.csdr_print_bufsizes = pm.getPropertyValue("csdr_print_bufsizes")
dsp.csdr_through = pm.getPropertyValue("csdr_through")
sleep_sec=0.87/fft_fps
print("[openwebrx-spectrum] Spectrum thread initialized successfully.")
dsp.start()
if pm.getPropertyValue("csdr_dynamic_bufsize"):
dsp.read(8) #dummy read to skip bufsize & preamble
print("[openwebrx-spectrum] Note: CSDR_DYNAMIC_BUFSIZE_ON = 1")
print("[openwebrx-spectrum] Spectrum thread started.")
bytes_to_read=int(dsp.get_fft_bytes_to_read())
spectrum_thread_counter=0
while self.doRun:
data=dsp.read(bytes_to_read)
#print("gotcha",len(data),"bytes of spectrum data via spectrum_thread_function()")
if spectrum_thread_counter >= fft_fps:
spectrum_thread_counter=0
else: spectrum_thread_counter+=1
for c in self.clients:
c.write_spectrum_data(data)
'''
correction=0
for i in range(0,len(clients)):
i-=correction
if (clients[i].ws_started):
if clients[i].spectrum_queue.full():
print "[openwebrx-spectrum] client spectrum queue full, closing it."
close_client(i, False)
correction+=1
else:
clients[i].spectrum_queue.put([data]) # add new string by "reference" to all clients
'''
print("spectrum thread shut down")
def add_client(self, c):
self.clients.append(c)
def remove_client(self, c):
self.clients.remove(c)
if not self.clients:
self.shutdown()
def shutdown(self):
print("shutting down spectrum thread")
SpectrumThread.sharedInstance = None
self.doRun = False