Using a default alprd.conf file with an override in /etc/openalpr/alprd.conf

config/alprd.conf.defaults

@@ -1,17 +1,19 @@
 [daemon]
 
-; country determines the training dataset used for recognizing plates.  Valid values are: us, eu
+; country determines the training dataset used for recognizing plates.  
+; Valid values are: us, eu, au, auwide, gb, kr, mx, sg
 country = us
 
 ; text name identifier for this location
-site_id = your-unique-sitename
+;   site_id = your-unique-sitename
 
 ; Declare each stream on a separate line
 ; each unique stream should be defined as stream = [url]
 
-stream = http://127.0.0.1/example_video_stream.mjpeg
-;stream = http://127.0.0.1/example_second_stream.mjpeg
-;stream = webcam
+; Example stream config:
+;   stream = http://127.0.0.1/example_video_stream.mjpeg
+;   stream = http://127.0.0.1/example_second_stream.mjpeg
+;   stream = webcam
 
 ; topn is the number of possible plate character variations to report
 topn = 10

config/alprd.conf.user

@@ -0,0 +1,4 @@
+; This configuration file overrides the default values specified 
+; in ${CMAKE_INSTALL_PREFIX}/share/openalpr/config/alprd.defaults.conf
+[daemon]
+

src/CMakeLists.txt

@@ -156,7 +156,12 @@ ENDIF()
 
 # Compile the alprd library on Unix-based OS
 IF (WITH_DAEMON)
-  ADD_EXECUTABLE( alprd  daemon.cpp daemon/beanstalk.c daemon/beanstalk.cc )
+  ADD_EXECUTABLE( alprd  
+    daemon.cpp 
+    daemon/daemonconfig.cpp 
+    daemon/beanstalk.c 
+    daemon/beanstalk.cc 
+)
 
   FIND_PACKAGE( log4cplus REQUIRED )
 
@@ -212,8 +217,13 @@ CONFIGURE_FILE(${CMAKE_SOURCE_DIR}/../config/openalpr.conf.defaults ${CMAKE_CURR
 install (FILES      ${CMAKE_CURRENT_BINARY_DIR}/share/openalpr/config/openalpr.defaults.conf DESTINATION ${CMAKE_INSTALL_PREFIX}/share/openalpr/config      COMPONENT config)
 
 IF (WITH_DAEMON)
+  CONFIGURE_FILE(${CMAKE_SOURCE_DIR}/../config/alprd.conf.user ${CMAKE_CURRENT_BINARY_DIR}/config/alprd.conf)
+  install (FILES      ${CMAKE_CURRENT_BINARY_DIR}/config/alprd.conf DESTINATION ${CMAKE_INSTALL_SYSCONFDIR}/openalpr/      COMPONENT config)
+
+  CONFIGURE_FILE(${CMAKE_SOURCE_DIR}/../config/alprd.conf.defaults ${CMAKE_CURRENT_BINARY_DIR}/share/openalpr/config/alprd.defaults.conf)
+  install (FILES      ${CMAKE_CURRENT_BINARY_DIR}/share/openalpr/config/alprd.defaults.conf DESTINATION ${CMAKE_INSTALL_PREFIX}/share/openalpr/config      COMPONENT config)
+
   install (TARGETS    alprd DESTINATION  ${CMAKE_INSTALL_PREFIX}/bin)
-  install (FILES      ${CMAKE_SOURCE_DIR}/../config/alprd.conf DESTINATION    ${CMAKE_INSTALL_SYSCONFDIR}/openalpr      COMPONENT config)
 ENDIF()
 
 

src/daemon.cpp

@@ -6,10 +6,10 @@
 
 #include "daemon/beanstalk.hpp"
 #include "video/logging_videobuffer.h"
+#include "daemon/daemonconfig.h"
 
 #include "tclap/CmdLine.h"
 #include "alpr.h"
-#include "openalpr/simpleini/simpleini.h"
 #include "openalpr/cjson.h"
 #include "support/tinythread.h"
 #include <curl/curl.h>
@@ -167,73 +167,47 @@ int main( int argc, const char** argv )
     LOG4CPLUS_INFO(logger, "Running OpenALPR daemon in the foreground.");
   }
   
-  CSimpleIniA ini;
-  ini.SetMultiKey();
+  LOG4CPLUS_INFO(logger, "Using: " << daemonConfigFile << " for daemon configuration");
   
-  ini.LoadFile(daemonConfigFile.c_str());
-  
-  std::vector<std::string> stream_urls;
+  std::string daemon_defaults_file = INSTALL_PREFIX  "/share/openalpr/config/alprd.defaults.conf";
+  DaemonConfig daemon_config(daemonConfigFile, daemon_defaults_file);
 
   
-  CSimpleIniA::TNamesDepend values;
-  ini.GetAllValues("daemon", "stream", values);
-
-  // sort the values into the original load order
-  values.sort(CSimpleIniA::Entry::LoadOrder());
-
-  // output all of the items
-  CSimpleIniA::TNamesDepend::const_iterator i;
-  for (i = values.begin(); i != values.end(); ++i) { 
-      stream_urls.push_back(i->pItem);
-  }
-  
-  
-  if (stream_urls.size() == 0)
+  if (daemon_config.stream_urls.size() == 0)
   {
     LOG4CPLUS_FATAL(logger, "No video streams defined in the configuration.");
     return 1;
   }
   
-  std::string country = ini.GetValue("daemon", "country", "us");
-  int topn = ini.GetLongValue("daemon", "topn", 20);
-  
-  bool storePlates = ini.GetBoolValue("daemon", "store_plates", false);
-  std::string imageFolder = ini.GetValue("daemon", "store_plates_location", "/tmp/");
-  bool uploadData = ini.GetBoolValue("daemon", "upload_data", false);
-  std::string upload_url = ini.GetValue("daemon", "upload_address", "");
-  std::string company_id = ini.GetValue("daemon", "company_id", "");
-  std::string site_id = ini.GetValue("daemon", "site_id", "");
-  
-  LOG4CPLUS_INFO(logger, "Using: " << daemonConfigFile << " for daemon configuration");
-  LOG4CPLUS_INFO(logger, "Using: " << imageFolder << " for storing valid plate images");
+  LOG4CPLUS_INFO(logger, "Using: " << daemon_config.imageFolder << " for storing valid plate images");
   
   pid_t pid;
   
-  for (int i = 0; i < stream_urls.size(); i++)
+  for (int i = 0; i < daemon_config.stream_urls.size(); i++)
   {
     pid = fork();
     if (pid == (pid_t) 0)
     {
       // This is the child process, kick off the capture data and upload threads
       CaptureThreadData* tdata = new CaptureThreadData();
-      tdata->stream_url = stream_urls[i];
+      tdata->stream_url = daemon_config.stream_urls[i];
       tdata->camera_id = i + 1;
       tdata->config_file = openAlprConfigFile;
-      tdata->output_images = storePlates;
-      tdata->output_image_folder = imageFolder;
-      tdata->country_code = country;
-      tdata->company_id = company_id;
-      tdata->site_id = site_id;
-      tdata->top_n = topn;
+      tdata->output_images = daemon_config.storePlates;
+      tdata->output_image_folder = daemon_config.imageFolder;
+      tdata->country_code = daemon_config.country;
+      tdata->company_id = daemon_config.company_id;
+      tdata->site_id = daemon_config.site_id;
+      tdata->top_n = daemon_config.topn;
       tdata->clock_on = clockOn;
       
       tthread::thread* thread_recognize = new tthread::thread(streamRecognitionThread, (void*) tdata);
       
-      if (uploadData)
+      if (daemon_config.uploadData)
       {
 	// Kick off the data upload thread
 	UploadThreadData* udata = new UploadThreadData();
-	udata->upload_url = upload_url;
+	udata->upload_url = daemon_config.upload_url;
 	tthread::thread* thread_upload = new tthread::thread(dataUploadThread, (void*) udata );
       }
       

src/daemon/daemonconfig.cpp

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2016 OpenALPR Technology, Inc.
+ * Open source Automated License Plate Recognition [http://www.openalpr.com]
+ *
+ * This file is part of OpenALPR.
+ *
+ * OpenALPR is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License
+ * version 3 as published by the Free Software Foundation
+ *
+ * This program 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "daemonconfig.h"
+#include "config_helper.h"
+
+using namespace alpr;
+
+DaemonConfig::DaemonConfig(std::string config_file, std::string config_defaults_file) {
+  CSimpleIniA ini;
+  ini.SetMultiKey();
+  ini.LoadFile(config_file.c_str());
+  
+  CSimpleIniA defaultIni;
+  defaultIni.SetMultiKey();
+  defaultIni.LoadFile(config_defaults_file.c_str());
+  
+  // Stream will only be in the user override config, never in the defaults
+  CSimpleIniA::TNamesDepend values;
+  ini.GetAllValues("daemon", "stream", values);
+
+  // sort the values into the original load order
+  values.sort(CSimpleIniA::Entry::LoadOrder());
+
+  // output all of the items
+  CSimpleIniA::TNamesDepend::const_iterator i;
+  for (i = values.begin(); i != values.end(); ++i) { 
+      stream_urls.push_back(i->pItem);
+  }
+
+  country = getString(&ini, &defaultIni, "daemon", "country", "us");
+  topn = getInt(&ini, &defaultIni, "daemon", "topn", 20);
+  
+  storePlates = getBoolean(&ini, &defaultIni, "daemon", "store_plates", false);
+  imageFolder = getString(&ini, &defaultIni, "daemon", "store_plates_location", "/tmp/");
+  uploadData = getBoolean(&ini, &defaultIni, "daemon", "upload_data", false);
+  upload_url = getString(&ini, &defaultIni, "daemon", "upload_address", "");
+  company_id = getString(&ini, &defaultIni, "daemon", "company_id", "");
+  site_id = getString(&ini, &defaultIni, "daemon", "site_id", "");
+}
+
+DaemonConfig::~DaemonConfig() {
+}
+

src/daemon/daemonconfig.h

@@ -0,0 +1,31 @@
+
+#ifndef OPENALPR_DAEMONCONFIG_H
+#define	OPENALPR_DAEMONCONFIG_H
+
+#include <string>
+#include <vector>
+#include "simpleini/simpleini.h"
+
+class DaemonConfig {
+public:
+  DaemonConfig(std::string config_file, std::string config_defaults_file);
+  virtual ~DaemonConfig();
+
+  std::vector<std::string> stream_urls;
+  
+  std::string country;
+  
+  int topn;
+  bool storePlates;
+  std::string imageFolder;
+  bool uploadData;
+  std::string upload_url;
+  std::string company_id;
+  std::string site_id;
+  
+private:
+
+};
+
+#endif	/* OPENALPR_DAEMONCONFIG_H */
+