src/can_decode_message.cpp

   1 /*
   2  * Copyright (C) 2015, 2016 "IoT.bzh"
   3  * Author "Romain Forlot" <romain.forlot@iot.bzh>
   4  * Author "Loic Collignon" <loic.collignon@iot.bzh>
   5  *
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  *       http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18
  19 #include "can_decode_message.hpp"
  20
  21 #include "can-utils.hpp"
  22 #include "openxc-utils.hpp"
  23 #include "can-signals.hpp"
  24 #include "can-decoder.hpp"
  25
  26 #include "can_reader.hpp"
  27
  28 void can_decode_message(can_bus_t &can_bus)
  29 {
  30         can_message_t can_message;
  31         std::vector <CanSignal> signals;
  32         std::vector <CanSignal>::iterator signals_i;
  33         openxc_VehicleMessage vehicle_message;
  34         openxc_DynamicField search_key, decoded_message;
  35         bool send = true;
  36
  37         decoder_t decoder;
  38
  39         while(can_bus.is_decoding())
  40         {
  41                 {
  42                         std::unique_lock<std::mutex> can_message_lock(can_message_mutex);
  43                         new_can_message.wait(can_message_lock);
  44                         can_message = can_bus.next_can_message();
  45                 }
  46
  47                 /* First we have to found which CanSignal it is */
  48                 search_key = build_DynamicField((double)can_message.get_id());
  49                 signals = find_can_signals(search_key);
  50
  51                 /* Decoding the message ! Don't kill the messenger ! */
  52                 for(const auto& sig : signals)
  53                 {
  54                         {
  55                                 std::lock_guard<std::mutex> subscribed_signals_lock(subscribed_signals_mutex);
  56                                 std::map<std::string, struct afb_event> subscribed_signals = get_subscribed_signals();
  57                                 const auto& it_event = subscribed_signals.find(sig.genericName);
  58
  59                                 if(it_event != subscribed_signals.end() &&
  60                                         afb_event_is_valid(it_event->second))
  61                                 {
  62                                         decoded_message = decoder.decodeSignal(sig, can_message, getSignals(), &send);
  63
  64                                         openxc_SimpleMessage s_message = build_SimpleMessage(sig.genericName, decoded_message);
  65                                         vehicle_message = build_VehicleMessage_with_SimpleMessage(openxc_DynamicField_Type::openxc_DynamicField_Type_NUM, s_message);
  66
  67                                         std::lock_guard<std::mutex> decoded_can_message_lock(decoded_can_message_mutex);
  68                                         can_bus.push_new_vehicle_message(vehicle_message);
  69                                 }
  70                                 new_decoded_can_message.notify_one();
  71                         }
  72                 }
  73         }
  74 }