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;
 

app/node/input/time/timeinput.cpp

@@ -62,4 +62,12 @@ NodeValueTable TimeInput::Value(NodeValueDatabase &value) const
   return table;
 }
 
+void TimeInput::Hash(QCryptographicHash &hash, const rational &time) const
+{
+  Node::Hash(hash, time);
+
+  // Make sure time is hashed
+  hash.addData(NodeParam::ValueToBytes(NodeParam::kRational, QVariant::fromValue(time)));
+}
+
 OLIVE_NAMESPACE_EXIT

app/node/input/time/timeinput.h

@@ -40,6 +40,8 @@ public:
 
   virtual NodeValueTable Value(NodeValueDatabase& value) const override;
 
+  virtual void Hash(QCryptographicHash& hash, const rational& time) const override;
+
 };
 
 OLIVE_NAMESPACE_EXIT

app/node/node.cpp

@@ -25,6 +25,9 @@
 #include <QFile>
 
 #include "common/xmlutils.h"
+#include "project/project.h"
+#include "project/item/footage/footage.h"
+#include "project/item/footage/imagestream.h"
 
 OLIVE_NAMESPACE_ENTER
 
@@ -232,6 +235,11 @@ void Node::SaveInternal(QXmlStreamWriter *) const
 {
 }
 
+QList<NodeInput *> Node::GetInputsToHash() const
+{
+  return GetInputsIncludingArrays();
+}
+
 QString Node::ReadFileAsString(const QString &filename)
 {
   QFile f(filename);
@@ -294,6 +302,69 @@ void Node::SetLabel(const QString &s)
   }
 }
 
+void Node::Hash(QCryptographicHash &hash, const rational& time) const
+{
+  // Add this Node's ID
+  hash.addData(id().toUtf8());
+
+  QList<NodeInput*> inputs = GetInputsToHash();
+
+  foreach (NodeInput* input, inputs) {
+    // For each input, try to hash its value
+
+    // Get time adjustment
+    // For a single frame, we only care about one of the times
+    rational input_time = InputTimeAdjustment(input, TimeRange(time, time)).in();
+
+    if (input->IsConnected()) {
+      // Traverse down this edge
+      input->get_connected_node()->Hash(hash, input_time);
+    } else {
+      // Grab the value at this time
+      QVariant value = input->get_value_at_time(input_time);
+      hash.addData(NodeParam::ValueToBytes(input->data_type(), value));
+    }
+
+    // We have one exception for FOOTAGE types, since we resolve the footage into a frame in the renderer
+    if (input->data_type() == NodeParam::kFootage) {
+      StreamPtr stream = input->get_standard_value().value<StreamPtr>();
+
+      if (stream) {
+        // Add footage details to hash
+
+        // Footage filename
+        hash.addData(stream->footage()->filename().toUtf8());
+
+        // Footage last modified date
+        hash.addData(stream->footage()->timestamp().toString().toUtf8());
+
+        // Footage stream
+        hash.addData(QString::number(stream->index()).toUtf8());
+
+        if (stream->type() == Stream::kImage || stream->type() == Stream::kVideo) {
+          ImageStreamPtr image_stream = std::static_pointer_cast<ImageStream>(stream);
+
+          // Current color config and space
+          hash.addData(image_stream->footage()->project()->color_manager()->GetConfigFilename().toUtf8());
+          hash.addData(image_stream->colorspace().toUtf8());
+
+          // Alpha associated setting
+          hash.addData(QString::number(image_stream->premultiplied_alpha()).toUtf8());
+        }
+
+        // Footage timestamp
+        if (stream->type() == Stream::kVideo) {
+          hash.addData(QStringLiteral("%1/%2").arg(QString::number(input_time.numerator()),
+                                                    QString::number(input_time.denominator())).toUtf8());
+
+          hash.addData(QString::number(static_cast<VideoStream*>(stream.get())->start_time()).toUtf8());
+
+        }
+      }
+    }
+  }
+}
+
 void Node::CopyInputs(Node *source, Node *destination, bool include_connections)
 {
   Q_ASSERT(source->id() == destination->id());

app/node/node.h

@@ -362,6 +362,8 @@ public:
   const QString& GetLabel() const;
   void SetLabel(const QString& s);
 
+  virtual void Hash(QCryptographicHash& hash, const rational &time) const;
+
 protected:
   void AddInput(NodeInput* input);
 
@@ -373,6 +375,8 @@ protected:
 
   virtual void SaveInternal(QXmlStreamWriter* writer) const;
 
+  virtual QList<NodeInput*> GetInputsToHash() const;
+
 public slots:
 
 signals:

app/node/output/track/track.cpp

@@ -418,6 +418,16 @@ NodeInputArray *TrackOutput::block_input() const
   return block_input_;
 }
 
+void TrackOutput::Hash(QCryptographicHash &hash, const rational &time) const
+{
+  // Resolve block list
+  Block* b = BlockAtTime(time);
+
+  if (b) {
+    return b->Hash(hash, time);
+  }
+}
+
 void TrackOutput::SetTrackName(const QString &name)
 {
   track_name_ = name;

app/node/output/track/track.h

@@ -152,6 +152,8 @@ public:
 
   NodeInputArray* block_input() const;
 
+  virtual void Hash(QCryptographicHash& hash, const rational &time) const override;
+
 public slots:
   void SetTrackName(const QString& name);