Cleanup source tree

Move all C++ source files in the src subfolder. Adapted the cmake process accordingly and cleanup.

src/GstToolkit.h

@@ -0,0 +1,35 @@
+#ifndef __GSTGUI_TOOLKIT_H_
+#define __GSTGUI_TOOLKIT_H_
+
+#include <gst/gst.h>
+
+#include <string>
+#include <list>
+
+namespace GstToolkit
+{
+
+typedef enum {
+    TIME_STRING_FIXED = 0,
+    TIME_STRING_ADJUSTED,
+    TIME_STRING_MINIMAL,
+    TIME_STRING_READABLE
+} time_string_mode;
+
+std::string time_to_string(guint64 t, time_string_mode m = TIME_STRING_ADJUSTED);
+std::string filename_to_uri(std::string filename);
+
+std::string gst_version();
+
+std::list<std::string> all_plugins();
+std::list<std::string> enable_gpu_decoding_plugins(bool enable = true);
+std::string used_gpu_decoding_plugins(GstElement *gstbin);
+std::string used_decoding_plugins(GstElement *gstbin);
+
+std::list<std::string> all_plugin_features(std::string pluginname);
+bool has_feature (std::string name);
+bool enable_feature (std::string name, bool enable);
+
+}
+
+#endif // __GSTGUI_TOOLKIT_H_