sweeping node graph changes for new rendering pipeline

The new rendering pipeline strives to simplify the nodes themselves as much
as possible and move much of the logic to an external rendering engine. This
change removes all of the responsibilities that no longer belong to the
nodes themselves and will soon be folded into the renderer.

app/node/output/timeline/timeline.cpp

@@ -93,11 +93,8 @@ const rational &TimelineOutput::Timebase()
   return timebase_;
 }
 
-QVariant TimelineOutput::Value(NodeOutput *output, const rational &in, const rational &out)
+QVariant TimelineOutput::Value(NodeOutput *output)
 {
-  Q_UNUSED(in)
-  Q_UNUSED(out)
-
   if (output == length_output_) {
     return QVariant::fromValue(length_);
   }

app/node/output/timeline/timeline.h

@@ -67,7 +67,7 @@ signals:
   void TrackRemoved(TrackOutput* track);
 
 protected:
-  virtual QVariant Value(NodeOutput* output, const rational &in, const rational &out) override;
+  virtual QVariant Value(NodeOutput* output) override;
 
 private:
   QVector<NodeInput*> track_inputs_;

app/node/output/timeline/tracklist.cpp

@@ -34,7 +34,7 @@ TrackList::TrackList(TimelineOutput* parent, const enum TrackType &type, NodeInp
 
 TrackOutput *TrackList::attached_track()
 {
-  return Node::ValueToPtr<TrackOutput>(track_input_->get_value(0));
+  return Node::ValueToPtr<TrackOutput>(track_input_->get_realtime_value_of_connected_output());
 }
 
 void TrackList::AttachTrack(TrackOutput *track)
@@ -176,7 +176,7 @@ void TrackList::TrackConnectionRemoved(NodeEdgePtr edge)
     return;
   }
 
-  DetachTrack(Node::ValueToPtr<TrackOutput>(edge->output()->get_value(0, 0)));
+  DetachTrack(Node::ValueToPtr<TrackOutput>(edge->output()->get_realtime_value()));
 }
 
 void TrackList::TrackEdgeAdded(NodeEdgePtr edge)
@@ -186,7 +186,7 @@ void TrackList::TrackEdgeAdded(NodeEdgePtr edge)
 
   // If this edge pertains to the track's track input, all the tracks just added need attaching
   if (edge->input() == track->track_input()) {
-    TrackOutput* added_track = Node::ValueToPtr<TrackOutput>(edge->output()->get_value(0, 0));
+    TrackOutput* added_track = Node::ValueToPtr<TrackOutput>(edge->output()->get_realtime_value());
 
     AttachTrack(added_track);
   }
@@ -199,7 +199,7 @@ void TrackList::TrackEdgeRemoved(NodeEdgePtr edge)
 
   // If this edge pertains to the track's track input, all the tracks just added need attaching
   if (edge->input() == track->track_input()) {
-    TrackOutput* added_track = Node::ValueToPtr<TrackOutput>(edge->output()->get_value(0, 0));
+    TrackOutput* added_track = Node::ValueToPtr<TrackOutput>(edge->output()->get_realtime_value());
 
     DetachTrack(added_track);
   }

app/node/output/track/track.cpp

@@ -139,7 +139,7 @@ QList<NodeDependency> TrackOutput::RunDependencies(NodeOutput* output, const rat
 
 TrackOutput *TrackOutput::next_track()
 {
-  return ValueToPtr<TrackOutput>(track_input_->get_value(0));
+  return ValueToPtr<TrackOutput>(track_input_->get_realtime_value_of_connected_output());
 }
 
 NodeInput *TrackOutput::track_input()
@@ -191,12 +191,12 @@ void TrackOutput::InvalidateCache(const rational &start_range, const rational &e
   }
 }
 
-QVariant TrackOutput::Value(NodeOutput *output, const rational &in, const rational &out)
+QVariant TrackOutput::Value(NodeOutput *output)
 {
   if (output == track_output_) {
     // Set track output correctly
     return PtrToValue(this);
-  } else if (output == buffer_output()) {
+  /*} else if (output == buffer_output()) {
     ValidateCurrentBlock(in);
 
     if (current_block_ != this) {
@@ -205,11 +205,11 @@ QVariant TrackOutput::Value(NodeOutput *output, const rational &in, const ration
     }
 
     // No texture is valid
-    return 0;
+    return 0;*/
   }
 
   // Run default node processing
-  return Block::Value(output, in, out);
+  return Block::Value(output);
 }
 
 void TrackOutput::InsertBlockBetweenBlocks(Block *block, Block *before, Block *after)

app/node/output/track/track.h

@@ -146,7 +146,7 @@ signals:
   void BlockRemoved(Block* block);
 
 protected:
-  virtual QVariant Value(NodeOutput* output, const rational& in, const rational &out) override;
+  virtual QVariant Value(NodeOutput* output) override;
 
 private:
   /**

app/node/output/viewer/viewer.cpp

@@ -104,14 +104,5 @@ void ViewerOutput::set_audio_params(const AudioParams &audio)
 
 rational ViewerOutput::Length()
 {
-  return length_input_->get_value(0).value<rational>();
-}
-
-QVariant ViewerOutput::Value(NodeOutput *output, const rational &in, const rational &out)
-{
-  Q_UNUSED(output)
-  Q_UNUSED(in)
-  Q_UNUSED(out)
-
-  return 0;
+  return length_input_->get_realtime_value_of_connected_output().value<rational>();
 }

app/node/output/viewer/viewer.h

@@ -62,9 +62,6 @@ signals:
 
   void SizeChanged(int width, int height);
 
-protected:
-  virtual QVariant Value(NodeOutput* output, const rational &in, const rational &out) override;
-
 private:
   NodeInput* texture_input_;