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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (C) 2019
# Matthias P. Braendli, matthias.braendli@mpb.li
#
# http://www.opendigitalradio.org
#
# This file is part of ODR-DabMux.
#
# ODR-DabMux is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# ODR-DabMux is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with ODR-DabMux. If not, see <http://www.gnu.org/licenses/>.
import zmq
import json
class RCParameter(object):
def __init__(self, param, value):
self.param = param
self.value = value
class RCModule(object):
"""Container object for RC module"""
def __init__(self, name):
self.name = name
self.parameters = []
class MuxRemoteControl(object):
"""Interact with ODR-DabMux using the ZMQ RC"""
def __init__(self, mux_host, mux_port=12722):
self._host = mux_host
self._port = mux_port
self._ctx = zmq.Context()
self.module_list = []
def zRead(self, message_parts):
sock = zmq.Socket(self._ctx, zmq.REQ)
sock.setsockopt(zmq.LINGER, 0)
sock.connect("tcp://{}:{}".format(self._host, self._port))
for i, part in enumerate(message_parts):
if i == len(message_parts) - 1:
f = 0
else:
f = zmq.SNDMORE
print("Send {} {}".format(i, part))
sock.send(part.encode(), flags=f)
print("Poll")
# use poll for timeouts:
poller = zmq.Poller()
poller.register(sock, zmq.POLLIN)
if poller.poll(5*1000): # 5s timeout in milliseconds
recv = sock.recv_multipart()
print("RX {}".format(recv))
sock.close()
return recv
else:
raise IOError("Timeout processing ZMQ request")
def load(self):
"""Load the list of RC modules"""
module_jsons = self.zRead(['list'])
self.module_list = []
for module_json in module_jsons:
module = json.loads(module_json)
name = module['name']
mod = RCModule(name)
module_params = self.zRead(['show', name])
print("m_p", module_params)
for param in module_params:
p, v = param.split(b': ')
mod.parameters.append(RCParameter(p, v))
self.module_list.append(mod)
def get_modules(self):
return self.module_list
def get_param_value(self, module, param):
value = self.zRead(['get', module, param])
if value[0] == b'fail':
raise ValueError("Error getting param: {}".format(value[1]))
else:
return value[0]
def set_param_value(self, module, param, value):
ret = self.zRead(['set', module, param, value])
if ret[0] == b'fail':
raise ValueError("Error getting param: {}".format(ret[1]))
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