first commit

nodes/vp_split_node.cpp

@@ -0,0 +1,47 @@
+
+#include "vp_split_node.h"
+#include <iostream>
+
+namespace vp_nodes {
+        
+    vp_split_node::vp_split_node(std::string node_name, 
+                                bool split_with_channel_index,
+                                bool split_with_deep_copy): 
+                                vp_node(node_name), 
+                                split_with_channel_index(split_with_channel_index),
+                                split_with_deep_copy(split_with_deep_copy) {
+        this->initialized();
+    }
+    
+    vp_split_node::~vp_split_node() {
+        deinitialized();
+    }
+
+    // override vp_meta_publisher::push_meta
+    // total 2*2 mode to push meta
+    void vp_split_node::push_meta(std::shared_ptr<vp_objects::vp_meta> meta) {
+        if (this->split_with_channel_index) {    
+            std::lock_guard<std::mutex> guard(this->subscribers_lock);
+            auto & i = meta->channel_index;
+            // assume array index stands for channel index
+            // make sure the next nodes attached to current node in the order of channel index.
+            if (this->subscribers.size() > i) {
+                auto & next = this->subscribers.at(i);  // get the right next node
+                if (this->split_with_deep_copy) {
+                    meta = meta->clone();  // new pointer to new memory allocation in heap, old pointer is ignored.
+                }        
+                next->meta_flow(meta);
+            }
+        }
+        else {
+            std::lock_guard<std::mutex> guard(this->subscribers_lock);
+            // see vp_meta_publisher::push_meta
+            for (auto i = this->subscribers.begin(); i != this->subscribers.end(); i++) {
+                if (this->split_with_deep_copy) {
+                    meta = meta->clone(); // each next node has a new pointer to new memory allocation in heap
+                }      
+                (*i)->meta_flow(meta);  
+            }
+        }
+    }
+}