node: split off traversing functions from renderer for usage elsewhere

Fixes issue where Viewer node wouldn't pick up correct length if a tracks weren't in use.
2020-03-13 15:31:15 +11:00
parent 41da5dbd53
commit 9e4c79699e
18 changed files with 218 additions and 142 deletions
@@ -0,0 +1,31 @@
+#ifndef NODETRAVERSER_H
+#define NODETRAVERSER_H
+
+#include "codec/decoder.h"
+#include "common/cancelableobject.h"
+#include "dependency.h"
+#include "node/output/track/track.h"
+#include "project/item/footage/stream.h"
+#include "value.h"
+
+class NodeTraverser : public CancelableObject
+{
+public:
+  NodeTraverser();
+
+  NodeValueTable ProcessNode(const NodeDependency &dep);
+
+protected:
+  NodeValueDatabase GenerateDatabase(const Node *node, const TimeRange &range);
+
+  virtual NodeValueTable RenderBlock(const TrackOutput *track, const TimeRange& range);
+
+  NodeValueTable ProcessInput(const NodeInput* input, const TimeRange &range);
+
+  virtual void InputProcessingEvent(NodeInput*, const TimeRange&, NodeValueTable*){}
+
+  virtual void ProcessNodeEvent(const Node*, const TimeRange&, const NodeValueDatabase&, NodeValueTable*){}
+
+};
+
+#endif // NODETRAVERSER_H