Merge pull request #66 from Algafix/general-dev

Fix visual bug: filter page before setting subframe gst

Author: Algafix

osnma/receiver/receiver.py

@@ -96,17 +96,14 @@ def _time_sync(self, data: 'DataFormat') -> bool:
 
     def _filter_page(self, data: 'DataFormat'):
         """
-        Filter page if it is not useful for teh current OSNMA implementation.
+        Filter page if it is not useful for the current OSNMA implementation.
         Checks for CRC, alert pages, dummy pages, other signals aside from E1BC, etc.
         Also, sets the FIST_TOW variable if not specified.
         """
 
         if Config.FIRST_GST is None:
             Config.FIRST_GST = data.gst_page
 
-        if not self.current_gst_subframe:
-            self.current_gst_subframe = self._get_gst_subframe(data.gst_page)
-
         if data.gst_page < Config.FIRST_GST:
             return True
 
@@ -127,6 +124,9 @@ def _filter_page(self, data: 'DataFormat'):
                            f'Page: {(data.gst_page.tow % 30):02} - Page NOT processed.')
             return True
 
+        if not self.current_gst_subframe:
+            self.current_gst_subframe = self._get_gst_subframe(data.gst_page)
+
         return False
 
     def _end_of_subframe_satellite(self, gst_sf: GST, satellite: Satellite):