Update stream::train

This needs to be a little more complicated. Retain the project pattern done by Streams during partial projects by using a timeVarying transform to collect the output template sets (grouped as they are at the end of the partial stream).

Update stream::train
This needs to be a little more complicated. Retain the project pattern done by Streams during partial projects by using a timeVarying transform to collect the output template sets (grouped as they are at the end of the partial stream).
Charles Otto
1 parent 95cd60aa
Showing 1 changed file with 29 additions and 0 deletions
openbr/plugins/stream.cpp
@@ -1014,7 +1014,27 @@ public:
  
 };
  
+// Semi-functional, doesn't do anything productive outside of stream::train
+class CollectSets : public TimeVaryingTransform
+{
+    Q_OBJECT
+public:
+    CollectSets() : TimeVaryingTransform(false, false) {}
+
+    QList<TemplateList> sets;
  
+    void projectUpdate(const TemplateList &src, TemplateList &dst)
+    {
+        (void) dst;
+        sets.append(src);
+    }
+
+    void train(const TemplateList & data)
+    {
+        (void) data;
+    }
+
+};
  
 class DirectStreamTransform : public CompositeTransform
 {
@@ -1036,16 +1056,24 @@ public:
         if (end_idx == 0)
             return;
  
+        CollectSets collector;
+
         // Set transforms to the start, up to end_idx
         QList<Transform *> backup = this->transforms;
         transforms = backup.mid(0,end_idx);
+        // We use collector to retain the project structure at the end of the
+        // truncated stream.
+        transforms.append(&collector);
  
         // Reinitialize, we now act as a shorter stream.
         init();
  
+        QList<TemplateList> output;
         for (int i=0; i < data.size(); i++) {
             projectUpdate(data[i], data[i]);
+            output.append(collector.sets);
         }
+        data = output;
         transforms = backup;
     }
  
@@ -1062,6 +1090,7 @@ public:
                 QList<TemplateList> copy = data;
                 // Project from the start to the trainable stage.
                 subProject(copy,i);
+
                 transforms[i]->train(copy);
             }
         }