Implements #228 adaptive MLS and smoothing channel

Could do with a lot of improvement, but moving in right direction

applications/reconstruct/src/main.cpp

@@ -282,11 +282,13 @@ static void run(ftl::Configurable *root) {
 			UNIQUE_LOCK(scene_A.mtx, lk);
 
 			// Apply pre-filters to all frames
-			for (int i=0; i<scene_A.frames.size(); ++i) {
+			/*for (int i=0; i<scene_A.frames.size(); ++i) {
 				auto &f = scene_A.frames[i];
 				auto s = scene_A.sources[i];
 				prefilter->apply(f, f, s, 0);
-			}
+			}*/
+
+			prefilter->apply(scene_A, scene_A, 0);
 
 			// Send all frames to GPU, block until done?
 			//scene_A.upload(Channel::Colour + Channel::Depth);  // TODO: (Nick) Add scene stream.