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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Copyright (C) 2018
# Matthias P. Braendli, matthias.braendli@mpb.li
#
# http://www.opendigitalradio.org
#
# This file is part of ODR-DabMod.
#
# ODR-DabMod 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-DabMod 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-DabMod. If not, see <http://www.gnu.org/licenses/>.
import zmq
import json
from typing import List
class ModRemoteControl:
"""Interact with ODR-DabMod using the ZMQ RC"""
def __init__(self, mod_host, mod_port=9400):
self._host = mod_host
self._port = mod_port
self._ctx = zmq.Context()
def _read(self, message_parts: List[str]):
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
sock.send(part.encode(), flags=f)
# 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()
sock.close()
return [r.decode() for r in recv]
else:
raise IOError("Timeout processing ZMQ request")
def get_modules(self):
modules = {}
for mod in [json.loads(j) for j in self._read(['list'])]:
params = {}
pv_list = self._read(['show', mod['name']])
for pv in pv_list:
p, _, v = pv.partition(": ")
params[p] = {"value": v.strip()}
for p in mod['params']:
if p in params:
params[p]["help"] = mod['params'][p]
modules[mod['name']] = params
return modules
def get_param_value(self, module: str, param: str) -> str:
value = self._read(['get', module, param])
if value[0] == 'fail':
raise ValueError("Error getting param: {}".format(value[1]))
else:
return value[0]
def set_param_value(self, module: str, param: str, value: str) -> None:
ret = self._read(['set', module, param, value])
if ret[0] == 'fail':
raise ValueError("Error setting param: {}".format(ret[1]))
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