Add RC readout in web gui

1 files changed, 92 insertions, 0 deletions

diff --git a/gui/muxrc.py b/gui/muxrc.py
new file mode 100644
index 0000000..7644ae4
--- /dev/null
+++ b/gui/muxrc.py
@@ -0,0 +1,92 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+#   Copyright (C) 2016
+#   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, 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_names = self.zRead([b'list'])
+
+        self.module_list = []
+
+        for name in module_names:
+            mod = RCModule(name)
+            module_params = self.zRead([b'show', name])
+
+            for param in module_params:
+                p, v = param.split(': ')
+                mod.parameters.append(RCParameter(p, v))
+
+            self.module_list.append(mod)
+
+    def get_modules(self):
+        return self.module_list
+