Framework for dynamic videoio backends, FFmpeg and GStreamer plugins

modules/core/src/utils/datafile.cpp

@@ -144,6 +144,11 @@ static cv::String getModuleLocation(const void* addr)
     return cv::String();
 }
 
+std::string getBinLocation()
+{
+    return getModuleLocation((void*)getModuleLocation); // use code addr, doesn't work with static linkage!
+}
+
 cv::String findDataFile(const cv::String& relative_path,
                         const char* configuration_parameter,
                         const std::vector<String>* search_paths,
@@ -287,7 +292,7 @@ cv::String findDataFile(const cv::String& relative_path,
         }
     }
 
-    cv::String module_path = getModuleLocation((void*)getModuleLocation);  // use code addr, doesn't work with static linkage!
+    cv::String module_path = getBinLocation();
     CV_LOG_DEBUG(NULL, "Detected module path: '" << module_path << '\'');
 
     if (!has_tested_build_directory &&

modules/core/src/utils/filesystem.cpp

@@ -83,6 +83,14 @@ cv::String join(const cv::String& base, const cv::String& path)
     return result;
 }
 
+CV_EXPORTS cv::String getParent(const cv::String &path)
+{
+    std::string::size_type loc = path.find_last_of("/\\");
+    if (loc == std::string::npos)
+        return std::string();
+    return std::string(path, 0, loc);
+}
+
 #if OPENCV_HAVE_FILESYSTEM_SUPPORT
 
 cv::String canonical(const cv::String& path)