multicam: finished usable implementation

app/node/input/multicam/multicamnode.h

@@ -20,6 +20,8 @@ public:
 
   virtual ActiveElements GetActiveElementsAtTime(const QString &input, const TimeRange &r) const override;
 
+  virtual ShaderCode GetShaderCode(const ShaderRequest &id) const override;
+
   virtual void Value(const NodeValueRow& value, const NodeGlobals &globals, NodeValueTable *table) const override;
 
   virtual void Retranslate() override;
@@ -27,6 +29,27 @@ public:
   static const QString kCurrentInput;
   static const QString kSourcesInput;
 
+  void SetMonitorMode(bool e) { monitor_ = e; }
+
+  int GetSourceCount() const
+  {
+    return InputArraySize(kSourcesInput);
+  }
+
+  static void GetRowsAndColumns(int sources, int *rows, int *cols);
+  void GetRowsAndColumns(int *rows, int *cols) const
+  {
+    return GetRowsAndColumns(GetSourceCount(), rows, cols);
+  }
+
+  static int RowsColsToIndex(int row, int col, int total_rows, int total_cols)
+  {
+    return col + row * total_cols;
+  }
+
+private:
+  bool monitor_;
+
 };
 
 }