Add/Fix/Improve HRTF support for Pigeon static simulations

This fixes an error in itaGeoPropagation such that multichannel IR DAFF directives are used correctly. With this, HRTFs now work for static simulations. Additionally, this MR adds support to read .ita and .sofa directivities. Internally both are stored as itaAudio objects. With this, this MR add support to use the itaAudio directivitiesin the simulation.

applications/SoundFieldSimulation/Pigeon/@itaGeoPropagation/load_directivity.m

@@ -30,6 +30,15 @@ if strcmpi( directivity_file_ext, '.daff' )
     end
     
     obj.directivity_db.( directivity_id ).delay_samples = delay_samples;
+elseif strcmpi( directivity_file_ext, '.ita' )
+
+    obj.directivity_db.( directivity_id ).data = ita_read( directivity_path );
+    obj.directivity_db.( directivity_id ).delay_samples = delay_samples;
+
+elseif strcmpi( directivity_file_ext, '.sofa' )
+
+    obj.directivity_db.( directivity_id ).data = ita_read_sofa( directivity_path );
+    obj.directivity_db.( directivity_id ).delay_samples = delay_samples;
     
 else