viewer: repush buffers

Fixes nested sequences

app/node/output/viewer/viewer.cpp

@@ -376,6 +376,20 @@ Node::ValueHint ViewerOutput::GetConnectedSampleValueHint()
   return GetValueHintForInput(kSamplesInput);
 }
 
+void ViewerOutput::Value(const NodeValueRow &value, const NodeGlobals &globals, NodeValueTable *table) const
+{
+  if (HasInputWithID(kTextureInput)) {
+    NodeValue repush = value[kTextureInput];
+    repush.set_tag(Track::Reference(Track::kVideo, 0).ToString());
+    table->Push(repush);
+  }
+  if (HasInputWithID(kSamplesInput)) {
+    NodeValue repush = value[kSamplesInput];
+    repush.set_tag(Track::Reference(Track::kAudio, 0).ToString());
+    table->Push(value[kSamplesInput]);
+  }
+}
+
 void ViewerOutput::InputValueChangedEvent(const QString &input, int element)
 {
   if (element == 0) {

app/node/output/viewer/viewer.h

@@ -162,6 +162,8 @@ public:
 
   virtual ValueHint GetConnectedSampleValueHint();
 
+  virtual void Value(const NodeValueRow& value, const NodeGlobals &globals, NodeValueTable *table) const override;
+
   static const QString kVideoParamsInput;
   static const QString kAudioParamsInput;
   static const QString kSubtitleParamsInput;

app/node/value.h

@@ -236,6 +236,11 @@ public:
     return tag_;
   }
 
+  void set_tag(const QString& tag)
+  {
+    tag_ = tag;
+  }
+
   const Node* source() const
   {
     return from_;