added bscan reprocessing

python_app/gui/controllers/app_window_pipeline_mixin.py

@@ -150,6 +150,13 @@ class AppWindowPipelineMixin:
             # completed and the GUI hung.
             single_capture_start_ns = time.monotonic_ns() if single_capture else None
 
+            # `data_preprocessor` is about to become the owner of the preprocessed ring
+            # again, so the GUI must stop holding a writer into it. A queued replay would
+            # otherwise interleave with the real producer.
+            self._bscan_reprocess_timer.stop()
+            self._close_replay_ring_writer()
+            self._discard_bscan_replay_results()
+
             self._supervisor.start(config_path, allow_clean_orchestrator_exit=single_capture)
             self._close_readers()
             self._raw_reader = ShmRingReader(config.rings.raw_tap.name)
@@ -683,6 +690,7 @@ class AppWindowPipelineMixin:
         """Reset runtime history and B-scan caches."""
         self._replace_runtime_history(retained_raw=[], retained_pre=[], retained_result=[])
         self._bscan_history_floor_collection_id = 0
+        self._discard_bscan_replay_results()
         self._clear_history_mode_caches()
         self._update_history_indicator()