implement entire project in nodes

Project items are now represented directly in nodes opening up more versatility and possibilities. This is the first iteration of this and will be buggy. Need to test thoroughly.

app/node/value.cpp

@@ -27,6 +27,7 @@
 #include <QVector4D>
 
 #include "common/tohex.h"
+#include "project/item/footage/stream.h"
 #include "render/color.h"
 
 namespace olive {
@@ -64,8 +65,6 @@ QString NodeValue::ValueToString(Type data_type, const QVariant &value, bool val
                                              QString::number(c.alpha()));
   } else if (data_type == kRational) {
     return value.value<rational>().toString();
-  } else if (data_type == kFootage) {
-    return QString::number(value.value<quintptr>());
   } else if (data_type == kTexture
              || data_type == kSamples) {
     // These data types need no XML representation
@@ -116,9 +115,14 @@ QByteArray NodeValue::ValueToBytes(NodeValue::Type type, const QVariant &value)
   case kVec4: return ValueToBytesInternal<QVector4D>(value);
   case kCombo: return ValueToBytesInternal<int>(value);
 
+  case kVideoStreamProperties:
+  case kAudioStreamProperties:
+    return value.value<Stream>().toBytes();
+
+
   // These types have no persistent input
   case kNone:
-  case kFootage:
+  case kFootageJob:
   case kTexture:
   case kSamples:
   case kShaderJob:
@@ -177,6 +181,10 @@ QVector<QVariant> NodeValue::split_normal_value_into_track_values(Type type, con
 
 QVariant NodeValue::combine_track_values_into_normal_value(Type type, const QVector<QVariant> &split)
 {
+  if (split.isEmpty()) {
+    return QVariant();
+  }
+
   switch (type) {
   case kVec2:
   {
@@ -293,15 +301,18 @@ QString NodeValue::GetPrettyDataTypeName(Type type)
     return QCoreApplication::translate("NodeValue", "Texture");
   case kSamples:
     return QCoreApplication::translate("NodeValue", "Samples");
-  case kFootage:
-    return QCoreApplication::translate("NodeValue", "Footage");
   case kVec2:
     return QCoreApplication::translate("NodeValue", "Vector 2D");
   case kVec3:
     return QCoreApplication::translate("NodeValue", "Vector 3D");
   case kVec4:
     return QCoreApplication::translate("NodeValue", "Vector 4D");
+  case kVideoStreamProperties:
+    return QCoreApplication::translate("NodeValue", "Video Stream Properties");
+  case kAudioStreamProperties:
+    return QCoreApplication::translate("NodeValue", "Audio Stream Properties");
 
+  case kFootageJob:
   case kShaderJob:
   case kSampleJob:
   case kGenerateJob: