nodes: moved hashing to nodes so they can override behavior if they wish

app/node/block/block.cpp

@@ -234,6 +234,18 @@ void Block::SaveInternal(QXmlStreamWriter *writer) const
   }
 }
 
+QList<NodeInput *> Block::GetInputsToHash() const
+{
+  QList<NodeInput*> inputs = Node::GetInputsToHash();
+
+  // Ignore these inputs
+  inputs.removeOne(media_in_input_);
+  inputs.removeOne(speed_input_);
+  inputs.removeOne(length_input_);
+
+  return inputs;
+}
+
 void Block::LengthInputChanged()
 {
   emit LengthChanged(length());

app/node/block/block.h

@@ -126,6 +126,8 @@ protected:
 
   virtual void SaveInternal(QXmlStreamWriter* writer) const override;
 
+  virtual QList<NodeInput*> GetInputsToHash() const override;
+
   Block* previous_;
   Block* next_;
 

app/node/block/transition/transition.cpp

@@ -129,6 +129,19 @@ double TransitionBlock::GetInProgress(const rational &time) const
   return clamp((GetInternalTransitionTime(time) - out_offset().toDouble()) / in_offset().toDouble(), 0.0, 1.0);
 }
 
+void TransitionBlock::Hash(QCryptographicHash &hash, const rational &time) const
+{
+  Block::Hash(hash, time);
+
+  double all_prog = GetTotalProgress(time);
+  double in_prog = GetInProgress(time);
+  double out_prog = GetOutProgress(time);
+
+  hash.addData(reinterpret_cast<const char*>(&all_prog), sizeof(double));
+  hash.addData(reinterpret_cast<const char*>(&in_prog), sizeof(double));
+  hash.addData(reinterpret_cast<const char*>(&out_prog), sizeof(double));
+}
+
 double TransitionBlock::GetInternalTransitionTime(const rational &time) const
 {
   return time.toDouble() - in().toDouble();

app/node/block/transition/transition.h

@@ -47,6 +47,8 @@ public:
   double GetOutProgress(const rational& time) const;
   double GetInProgress(const rational& time) const;
 
+  virtual void Hash(QCryptographicHash& hash, const rational &time) const override;
+
 private:
   double GetInternalTransitionTime(const rational& time) const;