827 lines
26 KiB
Python
827 lines
26 KiB
Python
import subprocess
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from owrx.config import PropertyManager
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from owrx.feature import FeatureDetector, UnknownFeatureException
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from owrx.meta import MetaParser
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from owrx.wsjt import WsjtParser
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from owrx.aprs import AprsParser
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from owrx.metrics import Metrics, DirectMetric
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from owrx.socket import getAvailablePort
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import threading
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import csdr
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import time
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import os
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import signal
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import sys
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import socket
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import logging
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logger = logging.getLogger(__name__)
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class SdrService(object):
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sdrProps = None
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sources = {}
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lastPort = None
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@staticmethod
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def getNextPort():
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pm = PropertyManager.getSharedInstance()
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(start, end) = pm["iq_port_range"]
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if SdrService.lastPort is None:
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SdrService.lastPort = start
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else:
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SdrService.lastPort += 1
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if SdrService.lastPort > end:
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raise IndexError("no more available ports to start more sdrs")
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return SdrService.lastPort
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@staticmethod
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def loadProps():
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if SdrService.sdrProps is None:
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pm = PropertyManager.getSharedInstance()
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featureDetector = FeatureDetector()
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def loadIntoPropertyManager(dict: dict):
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propertyManager = PropertyManager()
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for (name, value) in dict.items():
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propertyManager[name] = value
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return propertyManager
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def sdrTypeAvailable(value):
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try:
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if not featureDetector.is_available(value["type"]):
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logger.error(
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'The RTL source type "{0}" is not available. please check requirements.'.format(
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value["type"]
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)
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)
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return False
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return True
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except UnknownFeatureException:
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logger.error(
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'The RTL source type "{0}" is invalid. Please check your configuration'.format(value["type"])
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)
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return False
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# transform all dictionary items into PropertyManager object, filtering out unavailable ones
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SdrService.sdrProps = {
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name: loadIntoPropertyManager(value) for (name, value) in pm["sdrs"].items() if sdrTypeAvailable(value)
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}
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logger.info(
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"SDR sources loaded. Availables SDRs: {0}".format(
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", ".join(map(lambda x: x["name"], SdrService.sdrProps.values()))
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)
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)
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@staticmethod
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def getSource(id=None):
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SdrService.loadProps()
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sources = SdrService.getSources()
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if not sources:
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return None
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if id is None:
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# TODO: configure default sdr in config? right now it will pick the first one off the list.
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id = list(sources.keys())[0]
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if not id in sources:
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return None
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return sources[id]
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@staticmethod
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def getSources():
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SdrService.loadProps()
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for id in SdrService.sdrProps.keys():
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if not id in SdrService.sources:
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props = SdrService.sdrProps[id]
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className = "".join(x for x in props["type"].title() if x.isalnum()) + "Source"
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cls = getattr(sys.modules[__name__], className)
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SdrService.sources[id] = cls(id, props, SdrService.getNextPort())
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return {key: s for key, s in SdrService.sources.items() if not s.isFailed()}
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class SdrSource(object):
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def __init__(self, id, props, port):
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self.id = id
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self.props = props
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self.profile_id = None
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self.activateProfile()
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self.rtlProps = self.props.collect(
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*self.getEventNames()
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).defaults(PropertyManager.getSharedInstance())
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self.wireEvents()
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self.port = port
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self.monitor = None
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self.clients = []
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self.spectrumClients = []
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self.spectrumThread = None
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self.process = None
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self.modificationLock = threading.Lock()
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self.failed = False
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def getEventNames(self):
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return ["samp_rate", "nmux_memory", "center_freq", "ppm", "rf_gain", "lna_gain", "rf_amp", "antenna", "if_gain"]
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def wireEvents(self):
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def restart(name, value):
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logger.debug("restarting sdr 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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self.rtlProps.wire(restart)
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# override this in subclasses
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def getCommand(self):
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pass
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# override this in subclasses, if necessary
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def getFormatConversion(self):
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return None
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def activateProfile(self, profile_id=None):
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profiles = self.props["profiles"]
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if profile_id is None:
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profile_id = list(profiles.keys())[0]
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if profile_id == self.profile_id:
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return
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logger.debug("activating profile {0}".format(profile_id))
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self.profile_id = profile_id
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profile = profiles[profile_id]
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for (key, value) in profile.items():
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# skip the name, that would overwrite the source name.
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if key == "name":
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continue
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self.props[key] = value
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def getId(self):
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return self.id
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def getProfileId(self):
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return self.profile_id
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def getProfiles(self):
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return self.props["profiles"]
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def getName(self):
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return self.props["name"]
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def getProps(self):
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return self.props
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def getPort(self):
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return self.port
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def useNmux(self):
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return True
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def start(self):
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self.modificationLock.acquire()
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if self.monitor:
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self.modificationLock.release()
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return
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props = self.rtlProps
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cmd = self.getCommand().format(
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**props.collect(
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"samp_rate", "center_freq", "ppm", "rf_gain", "lna_gain", "rf_amp", "antenna", "if_gain"
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).__dict__()
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)
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format_conversion = self.getFormatConversion()
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if format_conversion is not None:
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cmd += " | " + format_conversion
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if self.useNmux():
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nmux_bufcnt = nmux_bufsize = 0
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while nmux_bufsize < props["samp_rate"] / 4:
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nmux_bufsize += 4096
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while nmux_bufsize * nmux_bufcnt < props["nmux_memory"] * 1e6:
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nmux_bufcnt += 1
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if nmux_bufcnt == 0 or nmux_bufsize == 0:
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logger.error(
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"Error: nmux_bufsize or nmux_bufcnt is zero. These depend on nmux_memory and samp_rate options in config_webrx.py"
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)
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self.modificationLock.release()
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return
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logger.debug("nmux_bufsize = %d, nmux_bufcnt = %d" % (nmux_bufsize, nmux_bufcnt))
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cmd = cmd + " | nmux --bufsize %d --bufcnt %d --port %d --address 127.0.0.1" % (
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nmux_bufsize,
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nmux_bufcnt,
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self.port,
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)
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self.process = subprocess.Popen(cmd, shell=True, preexec_fn=os.setpgrp)
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logger.info("Started rtl source: " + cmd)
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available = False
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def wait_for_process_to_end():
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rc = self.process.wait()
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logger.debug("shut down with RC={0}".format(rc))
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self.monitor = None
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self.monitor = threading.Thread(target=wait_for_process_to_end)
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self.monitor.start()
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retries = 1000
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while retries > 0:
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retries -= 1
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if self.monitor is None:
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break
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testsock = socket.socket()
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try:
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testsock.connect(("127.0.0.1", self.getPort()))
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testsock.close()
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available = True
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break
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except:
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time.sleep(0.1)
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if not available:
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self.failed = True
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self.postStart()
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self.modificationLock.release()
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for c in self.clients:
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if self.failed:
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c.onSdrFailed()
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else:
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c.onSdrAvailable()
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def postStart(self):
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pass
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def isAvailable(self):
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return self.monitor is not None
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def isFailed(self):
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return self.failed
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def stop(self):
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for c in self.clients:
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c.onSdrUnavailable()
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self.modificationLock.acquire()
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if self.process is not None:
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try:
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os.killpg(os.getpgid(self.process.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.monitor:
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self.monitor.join()
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self.sleepOnRestart()
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self.modificationLock.release()
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def sleepOnRestart(self):
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pass
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def hasActiveClients(self):
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activeClients = [c for c in self.clients if c.isActive()]
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return len(activeClients) > 0
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def addClient(self, c):
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self.clients.append(c)
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if self.hasActiveClients():
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self.start()
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def removeClient(self, c):
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try:
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self.clients.remove(c)
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except ValueError:
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pass
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if not self.hasActiveClients():
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self.stop()
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def addSpectrumClient(self, c):
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self.spectrumClients.append(c)
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if self.spectrumThread is None:
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self.spectrumThread = SpectrumThread(self)
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self.spectrumThread.start()
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def removeSpectrumClient(self, c):
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try:
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self.spectrumClients.remove(c)
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except ValueError:
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pass
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if not self.spectrumClients and self.spectrumThread is not None:
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self.spectrumThread.stop()
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self.spectrumThread = None
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def writeSpectrumData(self, data):
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for c in self.spectrumClients:
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c.write_spectrum_data(data)
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class Resampler(SdrSource):
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def __init__(self, props, port, sdr):
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sdrProps = sdr.getProps()
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self.shift = (sdrProps["center_freq"] - props["center_freq"]) / sdrProps["samp_rate"]
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self.decimation = int(float(sdrProps["samp_rate"]) / props["samp_rate"])
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if_samp_rate = sdrProps["samp_rate"] / self.decimation
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self.transition_bw = 0.15 * (if_samp_rate / float(sdrProps["samp_rate"]))
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props["samp_rate"] = if_samp_rate
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self.sdr = sdr
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super().__init__(None, props, port)
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def start(self):
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if self.isFailed():
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return
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self.modificationLock.acquire()
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if self.monitor:
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self.modificationLock.release()
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return
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props = self.rtlProps
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resampler_command = [
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"nc -v 127.0.0.1 {nc_port}".format(nc_port=self.sdr.getPort()),
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"csdr shift_addition_cc {shift}".format(shift=self.shift),
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"csdr fir_decimate_cc {decimation} {ddc_transition_bw} HAMMING".format(
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decimation=self.decimation, ddc_transition_bw=self.transition_bw
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),
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]
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nmux_bufcnt = nmux_bufsize = 0
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while nmux_bufsize < props["samp_rate"] / 4:
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nmux_bufsize += 4096
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while nmux_bufsize * nmux_bufcnt < props["nmux_memory"] * 1e6:
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nmux_bufcnt += 1
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if nmux_bufcnt == 0 or nmux_bufsize == 0:
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logger.error(
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"Error: nmux_bufsize or nmux_bufcnt is zero. These depend on nmux_memory and samp_rate options in config_webrx.py"
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)
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self.modificationLock.release()
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return
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logger.debug("nmux_bufsize = %d, nmux_bufcnt = %d" % (nmux_bufsize, nmux_bufcnt))
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resampler_command += [
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"nmux --bufsize %d --bufcnt %d --port %d --address 127.0.0.1" % (nmux_bufsize, nmux_bufcnt, self.port)
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]
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cmd = " | ".join(resampler_command)
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logger.debug("resampler command: %s", cmd)
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self.process = subprocess.Popen(cmd, shell=True, preexec_fn=os.setpgrp)
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logger.info("Started resampler source: " + cmd)
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available = False
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def wait_for_process_to_end():
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rc = self.process.wait()
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logger.debug("shut down with RC={0}".format(rc))
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self.monitor = None
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self.monitor = threading.Thread(target=wait_for_process_to_end)
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self.monitor.start()
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retries = 1000
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while retries > 0:
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retries -= 1
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if self.monitor is None:
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break
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testsock = socket.socket()
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try:
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testsock.connect(("127.0.0.1", self.getPort()))
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testsock.close()
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available = True
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break
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except:
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time.sleep(0.1)
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if not available:
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self.failed = True
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self.modificationLock.release()
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for c in self.clients:
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if self.failed:
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c.onSdrFailed()
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else:
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c.onSdrAvailable()
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def activateProfile(self, profile_id=None):
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pass
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class RtlSdrSocketSource(SdrSource):
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def __init__(self, id, props, port):
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super().__init__(id, props, port)
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self.controlSocket = None
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self.controlPort = getAvailablePort()
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def getEventNames(self):
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return ["samp_rate", "center_freq", "ppm", "rf_gain"]
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def wireEvents(self):
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def reconfigure(prop, value):
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logger.debug("sending property change over control socket: {0} changed to {1}".format(prop, value))
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self.controlSocket.send("{prop}:{value}\n".format(prop=prop, value=value).encode())
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self.rtlProps.wire(reconfigure)
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def postStart(self):
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logger.debug("opening control socket...")
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self.controlSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.controlSocket.connect(("localhost", self.controlPort))
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def stop(self):
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super().stop()
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if self.controlSocket:
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self.controlSocket.close()
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self.controlSocket = None
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def getCommand(self):
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return "rtl_connector -p {port} -c {controlPort}".format(port=self.port, controlPort=self.controlPort) + " -s {samp_rate} -f {center_freq} -g {rf_gain}"
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|
|
def getFormatConversion(self):
|
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return None
|
|
|
|
def useNmux(self):
|
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return False
|
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|
|
|
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class RtlSdrSource(SdrSource):
|
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def getCommand(self):
|
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return "rtl_sdr -s {samp_rate} -f {center_freq} -p {ppm} -g {rf_gain} -"
|
|
|
|
def getFormatConversion(self):
|
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return "csdr convert_u8_f"
|
|
|
|
|
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class HackrfSource(SdrSource):
|
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def getCommand(self):
|
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return "hackrf_transfer -s {samp_rate} -f {center_freq} -g {rf_gain} -l{lna_gain} -a{rf_amp} -r-"
|
|
|
|
def getFormatConversion(self):
|
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return "csdr convert_s8_f"
|
|
|
|
|
|
class SdrplaySource(SdrSource):
|
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def getCommand(self):
|
|
command = "rx_sdr -F CF32 -s {samp_rate} -f {center_freq} -p {ppm}"
|
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gainMap = {"rf_gain": "RFGR", "if_gain": "IFGR"}
|
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gains = [
|
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"{0}={{{1}}}".format(gainMap[name], name)
|
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for (name, value) in self.rtlProps.collect("rf_gain", "if_gain").__dict__().items()
|
|
if value is not None
|
|
]
|
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if gains:
|
|
command += " -g {gains}".format(gains=",".join(gains))
|
|
if self.rtlProps["antenna"] is not None:
|
|
command += ' -a "{antenna}"'
|
|
command += " -"
|
|
return command
|
|
|
|
def sleepOnRestart(self):
|
|
time.sleep(1)
|
|
|
|
|
|
class AirspySource(SdrSource):
|
|
def getCommand(self):
|
|
frequency = self.props["center_freq"] / 1e6
|
|
command = "airspy_rx"
|
|
command += " -f{0}".format(frequency)
|
|
command += " -r /dev/stdout -a{samp_rate} -g {rf_gain}"
|
|
return command
|
|
|
|
def getFormatConversion(self):
|
|
return "csdr convert_s16_f"
|
|
|
|
|
|
class SpectrumThread(csdr.output):
|
|
def __init__(self, sdrSource):
|
|
self.sdrSource = sdrSource
|
|
super().__init__()
|
|
|
|
self.props = props = self.sdrSource.props.collect(
|
|
"samp_rate",
|
|
"fft_size",
|
|
"fft_fps",
|
|
"fft_voverlap_factor",
|
|
"fft_compression",
|
|
"csdr_dynamic_bufsize",
|
|
"csdr_print_bufsizes",
|
|
"csdr_through",
|
|
"temporary_directory",
|
|
).defaults(PropertyManager.getSharedInstance())
|
|
|
|
self.dsp = dsp = csdr.dsp(self)
|
|
dsp.nc_port = self.sdrSource.getPort()
|
|
dsp.set_demodulator("fft")
|
|
|
|
def set_fft_averages(key, value):
|
|
samp_rate = props["samp_rate"]
|
|
fft_size = props["fft_size"]
|
|
fft_fps = props["fft_fps"]
|
|
fft_voverlap_factor = props["fft_voverlap_factor"]
|
|
|
|
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
|
|
)
|
|
|
|
self.subscriptions = [
|
|
props.getProperty("samp_rate").wire(dsp.set_samp_rate),
|
|
props.getProperty("fft_size").wire(dsp.set_fft_size),
|
|
props.getProperty("fft_fps").wire(dsp.set_fft_fps),
|
|
props.getProperty("fft_compression").wire(dsp.set_fft_compression),
|
|
props.getProperty("temporary_directory").wire(dsp.set_temporary_directory),
|
|
props.collect("samp_rate", "fft_size", "fft_fps", "fft_voverlap_factor").wire(set_fft_averages),
|
|
]
|
|
|
|
set_fft_averages(None, None)
|
|
|
|
dsp.csdr_dynamic_bufsize = props["csdr_dynamic_bufsize"]
|
|
dsp.csdr_print_bufsizes = props["csdr_print_bufsizes"]
|
|
dsp.csdr_through = props["csdr_through"]
|
|
logger.debug("Spectrum thread initialized successfully.")
|
|
|
|
def start(self):
|
|
self.sdrSource.addClient(self)
|
|
if self.sdrSource.isAvailable():
|
|
self.dsp.start()
|
|
|
|
def supports_type(self, t):
|
|
return t == "audio"
|
|
|
|
def receive_output(self, type, read_fn):
|
|
if self.props["csdr_dynamic_bufsize"]:
|
|
read_fn(8) # dummy read to skip bufsize & preamble
|
|
logger.debug("Note: CSDR_DYNAMIC_BUFSIZE_ON = 1")
|
|
|
|
threading.Thread(target=self.pump(read_fn, self.sdrSource.writeSpectrumData)).start()
|
|
|
|
def stop(self):
|
|
self.dsp.stop()
|
|
self.sdrSource.removeClient(self)
|
|
for c in self.subscriptions:
|
|
c.cancel()
|
|
self.subscriptions = []
|
|
|
|
def isActive(self):
|
|
return True
|
|
|
|
def onSdrAvailable(self):
|
|
self.dsp.start()
|
|
|
|
def onSdrUnavailable(self):
|
|
self.dsp.stop()
|
|
|
|
def onSdrFailed(self):
|
|
self.dsp.stop()
|
|
|
|
|
|
class DspManager(csdr.output):
|
|
def __init__(self, handler, sdrSource):
|
|
self.handler = handler
|
|
self.sdrSource = sdrSource
|
|
self.metaParser = MetaParser(self.handler)
|
|
self.wsjtParser = WsjtParser(self.handler)
|
|
self.aprsParser = AprsParser(self.handler)
|
|
|
|
self.localProps = (
|
|
self.sdrSource.getProps()
|
|
.collect(
|
|
"audio_compression",
|
|
"fft_compression",
|
|
"digimodes_fft_size",
|
|
"csdr_dynamic_bufsize",
|
|
"csdr_print_bufsizes",
|
|
"csdr_through",
|
|
"digimodes_enable",
|
|
"samp_rate",
|
|
"digital_voice_unvoiced_quality",
|
|
"dmr_filter",
|
|
"temporary_directory",
|
|
"center_freq",
|
|
)
|
|
.defaults(PropertyManager.getSharedInstance())
|
|
)
|
|
|
|
self.dsp = csdr.dsp(self)
|
|
self.dsp.nc_port = self.sdrSource.getPort()
|
|
|
|
def set_low_cut(cut):
|
|
bpf = self.dsp.get_bpf()
|
|
bpf[0] = cut
|
|
self.dsp.set_bpf(*bpf)
|
|
|
|
def set_high_cut(cut):
|
|
bpf = self.dsp.get_bpf()
|
|
bpf[1] = cut
|
|
self.dsp.set_bpf(*bpf)
|
|
|
|
def set_dial_freq(key, value):
|
|
freq = self.localProps["center_freq"] + self.localProps["offset_freq"]
|
|
self.wsjtParser.setDialFrequency(freq)
|
|
self.aprsParser.setDialFrequency(freq)
|
|
self.metaParser.setDialFrequency(freq)
|
|
|
|
self.subscriptions = [
|
|
self.localProps.getProperty("audio_compression").wire(self.dsp.set_audio_compression),
|
|
self.localProps.getProperty("fft_compression").wire(self.dsp.set_fft_compression),
|
|
self.localProps.getProperty("digimodes_fft_size").wire(self.dsp.set_secondary_fft_size),
|
|
self.localProps.getProperty("samp_rate").wire(self.dsp.set_samp_rate),
|
|
self.localProps.getProperty("output_rate").wire(self.dsp.set_output_rate),
|
|
self.localProps.getProperty("offset_freq").wire(self.dsp.set_offset_freq),
|
|
self.localProps.getProperty("squelch_level").wire(self.dsp.set_squelch_level),
|
|
self.localProps.getProperty("low_cut").wire(set_low_cut),
|
|
self.localProps.getProperty("high_cut").wire(set_high_cut),
|
|
self.localProps.getProperty("mod").wire(self.dsp.set_demodulator),
|
|
self.localProps.getProperty("digital_voice_unvoiced_quality").wire(self.dsp.set_unvoiced_quality),
|
|
self.localProps.getProperty("dmr_filter").wire(self.dsp.set_dmr_filter),
|
|
self.localProps.getProperty("temporary_directory").wire(self.dsp.set_temporary_directory),
|
|
self.localProps.collect("center_freq", "offset_freq").wire(set_dial_freq),
|
|
]
|
|
|
|
self.dsp.set_offset_freq(0)
|
|
self.dsp.set_bpf(-4000, 4000)
|
|
self.dsp.csdr_dynamic_bufsize = self.localProps["csdr_dynamic_bufsize"]
|
|
self.dsp.csdr_print_bufsizes = self.localProps["csdr_print_bufsizes"]
|
|
self.dsp.csdr_through = self.localProps["csdr_through"]
|
|
|
|
if self.localProps["digimodes_enable"]:
|
|
|
|
def set_secondary_mod(mod):
|
|
if mod == False:
|
|
mod = None
|
|
self.dsp.set_secondary_demodulator(mod)
|
|
if mod is not None:
|
|
self.handler.write_secondary_dsp_config(
|
|
{
|
|
"secondary_fft_size": self.localProps["digimodes_fft_size"],
|
|
"if_samp_rate": self.dsp.if_samp_rate(),
|
|
"secondary_bw": self.dsp.secondary_bw(),
|
|
}
|
|
)
|
|
|
|
self.subscriptions += [
|
|
self.localProps.getProperty("secondary_mod").wire(set_secondary_mod),
|
|
self.localProps.getProperty("secondary_offset_freq").wire(self.dsp.set_secondary_offset_freq),
|
|
]
|
|
|
|
self.sdrSource.addClient(self)
|
|
|
|
super().__init__()
|
|
|
|
def start(self):
|
|
if self.sdrSource.isAvailable():
|
|
self.dsp.start()
|
|
|
|
def receive_output(self, t, read_fn):
|
|
logger.debug("adding new output of type %s", t)
|
|
writers = {
|
|
"audio": self.handler.write_dsp_data,
|
|
"smeter": self.handler.write_s_meter_level,
|
|
"secondary_fft": self.handler.write_secondary_fft,
|
|
"secondary_demod": self.handler.write_secondary_demod,
|
|
"meta": self.metaParser.parse,
|
|
"wsjt_demod": self.wsjtParser.parse,
|
|
"packet_demod": self.aprsParser.parse,
|
|
}
|
|
write = writers[t]
|
|
|
|
threading.Thread(target=self.pump(read_fn, write)).start()
|
|
|
|
def stop(self):
|
|
self.dsp.stop()
|
|
self.sdrSource.removeClient(self)
|
|
for sub in self.subscriptions:
|
|
sub.cancel()
|
|
self.subscriptions = []
|
|
|
|
def setProperty(self, prop, value):
|
|
self.localProps.getProperty(prop).setValue(value)
|
|
|
|
def isActive(self):
|
|
return True
|
|
|
|
def onSdrAvailable(self):
|
|
logger.debug("received onSdrAvailable, attempting DspSource restart")
|
|
self.dsp.start()
|
|
|
|
def onSdrUnavailable(self):
|
|
logger.debug("received onSdrUnavailable, shutting down DspSource")
|
|
self.dsp.stop()
|
|
|
|
def onSdrFailed(self):
|
|
logger.debug("received onSdrFailed, shutting down DspSource")
|
|
self.dsp.stop()
|
|
self.handler.handleSdrFailure("sdr device failed")
|
|
|
|
|
|
class CpuUsageThread(threading.Thread):
|
|
sharedInstance = None
|
|
|
|
@staticmethod
|
|
def getSharedInstance():
|
|
if CpuUsageThread.sharedInstance is None:
|
|
CpuUsageThread.sharedInstance = CpuUsageThread()
|
|
return CpuUsageThread.sharedInstance
|
|
|
|
def __init__(self):
|
|
self.clients = []
|
|
self.doRun = True
|
|
self.last_worktime = 0
|
|
self.last_idletime = 0
|
|
self.endEvent = threading.Event()
|
|
super().__init__()
|
|
|
|
def run(self):
|
|
while self.doRun:
|
|
try:
|
|
cpu_usage = self.get_cpu_usage()
|
|
except:
|
|
cpu_usage = 0
|
|
for c in self.clients:
|
|
c.write_cpu_usage(cpu_usage)
|
|
self.endEvent.wait(timeout=3)
|
|
logger.debug("cpu usage thread shut down")
|
|
|
|
def get_cpu_usage(self):
|
|
try:
|
|
f = open("/proc/stat", "r")
|
|
except:
|
|
return 0 # Workaround, possibly we're on a Mac
|
|
line = ""
|
|
while not "cpu " in line:
|
|
line = f.readline()
|
|
f.close()
|
|
spl = line.split(" ")
|
|
worktime = int(spl[2]) + int(spl[3]) + int(spl[4])
|
|
idletime = int(spl[5])
|
|
dworktime = worktime - self.last_worktime
|
|
didletime = idletime - self.last_idletime
|
|
rate = float(dworktime) / (didletime + dworktime)
|
|
self.last_worktime = worktime
|
|
self.last_idletime = idletime
|
|
if self.last_worktime == 0:
|
|
return 0
|
|
return rate
|
|
|
|
def add_client(self, c):
|
|
self.clients.append(c)
|
|
if not self.is_alive():
|
|
self.start()
|
|
|
|
def remove_client(self, c):
|
|
try:
|
|
self.clients.remove(c)
|
|
except ValueError:
|
|
pass
|
|
if not self.clients:
|
|
self.shutdown()
|
|
|
|
def shutdown(self):
|
|
CpuUsageThread.sharedInstance = None
|
|
self.doRun = False
|
|
self.endEvent.set()
|
|
|
|
|
|
class TooManyClientsException(Exception):
|
|
pass
|
|
|
|
|
|
class ClientRegistry(object):
|
|
sharedInstance = None
|
|
creationLock = threading.Lock()
|
|
|
|
@staticmethod
|
|
def getSharedInstance():
|
|
with ClientRegistry.creationLock:
|
|
if ClientRegistry.sharedInstance is None:
|
|
ClientRegistry.sharedInstance = ClientRegistry()
|
|
return ClientRegistry.sharedInstance
|
|
|
|
def __init__(self):
|
|
self.clients = []
|
|
Metrics.getSharedInstance().addMetric("openwebrx.users", DirectMetric(self.clientCount))
|
|
super().__init__()
|
|
|
|
def broadcast(self):
|
|
n = self.clientCount()
|
|
for c in self.clients:
|
|
c.write_clients(n)
|
|
|
|
def addClient(self, client):
|
|
pm = PropertyManager.getSharedInstance()
|
|
if len(self.clients) >= pm["max_clients"]:
|
|
raise TooManyClientsException()
|
|
self.clients.append(client)
|
|
self.broadcast()
|
|
|
|
def clientCount(self):
|
|
return len(self.clients)
|
|
|
|
def removeClient(self, client):
|
|
try:
|
|
self.clients.remove(client)
|
|
except ValueError:
|
|
pass
|
|
self.broadcast()
|