openwebrx-clone/owrx/connection.py

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from owrx.config import PropertyManager
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from owrx.source import DspManager, CpuUsageThread, SdrService, ClientRegistry
from owrx.feature import FeatureDetector
import json
import logging
logger = logging.getLogger(__name__)
class OpenWebRxClient(object):
config_keys = ["waterfall_colors", "waterfall_min_level", "waterfall_max_level",
"waterfall_auto_level_margin", "lfo_offset", "samp_rate", "fft_size", "fft_fps",
"audio_compression", "fft_compression", "max_clients", "start_mod",
"client_audio_buffer_size", "start_freq", "center_freq", "mathbox_waterfall_colors",
"mathbox_waterfall_history_length", "mathbox_waterfall_frequency_resolution"]
def __init__(self, conn):
self.conn = conn
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ClientRegistry.getSharedInstance().addClient(self)
self.dsp = None
self.sdr = None
self.configSub = None
pm = PropertyManager.getSharedInstance()
self.setSdr()
# send receiver info
receiver_keys = ["receiver_name", "receiver_location", "receiver_qra", "receiver_asl", "receiver_gps",
"photo_title", "photo_desc"]
receiver_details = dict((key, pm.getPropertyValue(key)) for key in receiver_keys)
self.write_receiver_details(receiver_details)
profiles = [{"name": s.getName() + " " + p["name"], "id":sid + "|" + pid} for (sid, s) in SdrService.getSources().items() for (pid, p) in s.getProfiles().items()]
self.write_profiles(profiles)
features = FeatureDetector().feature_availability()
self.write_features(features)
CpuUsageThread.getSharedInstance().add_client(self)
def setSdr(self, id = None):
next = SdrService.getSource(id)
if (next == self.sdr):
return
self.stopDsp()
if self.configSub is not None:
self.configSub.cancel()
self.configSub = None
self.sdr = next
# send initial config
configProps = self.sdr.getProps().collect(*OpenWebRxClient.config_keys).defaults(PropertyManager.getSharedInstance())
def sendConfig(key, value):
config = dict((key, configProps[key]) for key in OpenWebRxClient.config_keys)
# TODO mathematical properties? hmmmm
config["start_offset_freq"] = configProps["start_freq"] - configProps["center_freq"]
self.write_config(config)
self.configSub = configProps.wire(sendConfig)
sendConfig(None, None)
self.sdr.addSpectrumClient(self)
def startDsp(self):
if self.dsp is None:
self.dsp = DspManager(self, self.sdr)
self.dsp.start()
def close(self):
self.stopDsp()
CpuUsageThread.getSharedInstance().remove_client(self)
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ClientRegistry.getSharedInstance().removeClient(self)
if self.configSub is not None:
self.configSub.cancel()
self.configSub = None
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self.conn.close()
logger.debug("connection closed")
def stopDsp(self):
if self.dsp is not None:
self.dsp.stop()
self.dsp = None
if self.sdr is not None:
self.sdr.removeSpectrumClient(self)
def setParams(self, params):
# only the keys in the protected property manager can be overridden from the web
protected = self.sdr.getProps().collect("samp_rate", "center_freq", "rf_gain", "type") \
.defaults(PropertyManager.getSharedInstance())
for key, value in params.items():
protected[key] = value
def setDspProperties(self, params):
for key, value in params.items():
self.dsp.setProperty(key, value)
def protected_send(self, data):
try:
self.conn.send(data)
# these exception happen when the socket is closed
except OSError:
self.close()
except ValueError:
self.close()
def write_spectrum_data(self, data):
self.protected_send(bytes([0x01]) + data)
def write_dsp_data(self, data):
self.protected_send(bytes([0x02]) + data)
def write_s_meter_level(self, level):
self.protected_send({"type":"smeter","value":level})
def write_cpu_usage(self, usage):
self.protected_send({"type":"cpuusage","value":usage})
def write_clients(self, clients):
self.protected_send({"type":"clients","value":clients})
def write_secondary_fft(self, data):
self.protected_send(bytes([0x03]) + data)
def write_secondary_demod(self, data):
self.protected_send(bytes([0x04]) + data)
def write_secondary_dsp_config(self, cfg):
self.protected_send({"type":"secondary_config", "value":cfg})
def write_config(self, cfg):
self.protected_send({"type":"config","value":cfg})
def write_receiver_details(self, details):
self.protected_send({"type":"receiver_details","value":details})
def write_profiles(self, profiles):
self.protected_send({"type":"profiles","value":profiles})
def write_features(self, features):
self.protected_send({"type":"features","value":features})
def write_metadata(self, metadata):
self.protected_send({"type":"metadata","value":metadata})
class WebSocketMessageHandler(object):
def __init__(self):
self.handshake = None
self.client = None
self.dsp = None
def handleTextMessage(self, conn, message):
if (message[:16] == "SERVER DE CLIENT"):
# maybe put some more info in there? nothing to store yet.
self.handshake = "completed"
logger.debug("client connection intitialized")
self.client = OpenWebRxClient(conn)
return
if not self.handshake:
logger.warning("not answering client request since handshake is not complete")
return
try:
message = json.loads(message)
if "type" in message:
if message["type"] == "dspcontrol":
if "action" in message and message["action"] == "start":
self.client.startDsp()
if "params" in message:
params = message["params"]
self.client.setDspProperties(params)
if message["type"] == "config":
if "params" in message:
self.client.setParams(message["params"])
if message["type"] == "setsdr":
if "params" in message:
self.client.setSdr(message["params"]["sdr"])
if message["type"] == "selectprofile":
if "params" in message and "profile" in message["params"]:
profile = message["params"]["profile"].split("|")
self.client.setSdr(profile[0])
self.client.sdr.activateProfile(profile[1])
else:
logger.warning("received message without type: {0}".format(message))
except json.JSONDecodeError:
logger.warning("message is not json: {0}".format(message))
def handleBinaryMessage(self, conn, data):
logger.error("unsupported binary message, discarding")
def handleClose(self, conn):
if self.client:
self.client.close()