From 17f59cee5f350652b5ab5309f7a4ee15133353d0 Mon Sep 17 00:00:00 2001
From: John Ludwig <john@theludwigs.com>
Date: Thu, 19 Jun 2014 12:10:12 -0700
Subject: [PATCH] Add SetPosition method

Allows video read stream to advance to a particular frame
---
 src/VideoCaptureWrap.cc | 17 +++++++++++++++++
 src/VideoCaptureWrap.h  |  7 +++++--
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/src/VideoCaptureWrap.cc b/src/VideoCaptureWrap.cc
index a23d6b3..fb8a796 100755
--- a/src/VideoCaptureWrap.cc
+++ b/src/VideoCaptureWrap.cc
@@ -36,6 +36,7 @@ VideoCaptureWrap::Init(Handle<Object> target) {
 	NODE_SET_PROTOTYPE_METHOD(constructor, "read", Read);
 	NODE_SET_PROTOTYPE_METHOD(constructor, "setWidth", SetWidth);
 	NODE_SET_PROTOTYPE_METHOD(constructor, "setHeight", SetHeight);
+	NODE_SET_PROTOTYPE_METHOD(constructor, "setPosition", SetPosition);
 
 	target->Set(String::NewSymbol("VideoCapture"), constructor->GetFunction());
 };    
@@ -115,6 +116,22 @@ VideoCaptureWrap::SetHeight(const Arguments &args){
 	return Undefined();
 }
 
+Handle<Value>
+VideoCaptureWrap::SetPosition(const Arguments &args){
+
+	HandleScope scope;
+	VideoCaptureWrap *v = ObjectWrap::Unwrap<VideoCaptureWrap>(args.This());
+
+	if(args.Length() != 1)
+		return scope.Close(Undefined());
+	
+	int pos = args[0]->IntegerValue();
+
+	v->cap.set(CV_CAP_PROP_POS_FRAMES, pos);
+
+	return Undefined();
+}
+
 Handle<Value>
 VideoCaptureWrap::Read(const Arguments &args) {
 
diff --git a/src/VideoCaptureWrap.h b/src/VideoCaptureWrap.h
index 5d5f96c..b239273 100755
--- a/src/VideoCaptureWrap.h
+++ b/src/VideoCaptureWrap.h
@@ -14,8 +14,11 @@ class VideoCaptureWrap: public node::ObjectWrap {
       static Handle<Value> Read(const v8::Arguments&);
 
       //(Optional) For setting width and height of the input video stream 
-	  static Handle<Value> SetWidth(const v8::Arguments&);
-	  static Handle<Value> SetHeight(const v8::Arguments&);      
+      static Handle<Value> SetWidth(const v8::Arguments&);
+      static Handle<Value> SetHeight(const v8::Arguments&);
+      
+      // to set frame position
+      static Handle<Value> SetPosition(const v8::Arguments&);        
 
 
       static Handle<Value> GetFrameAt(const v8::Arguments&);