From 62ac74c782451240ab4d625a5361ba1583143bfb Mon Sep 17 00:00:00 2001
From: BroodjeAap <davidzessen@gmail.com>
Date: Tue, 18 Aug 2020 19:02:41 +0000
Subject: [PATCH] added some more comments to stream.go

---
 stream.go | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/stream.go b/stream.go
index 28ba4ba..05a2529 100755
--- a/stream.go
+++ b/stream.go
@@ -59,13 +59,14 @@ func (s *Stream) Update() {
 	resp, err := http.Get(s.URL)
 	if err != nil {
 		log.Println(err)
-		s.Timeouts++
+		s.Timeouts++ // For increasing the Interval time every timeout
 		return
 	}
 	s.Timeouts = 0
 	img, err := ioutil.ReadAll(resp.Body)
 	defer resp.Body.Close()
 
+	// Get the image from the response and write it to disk in a goroutine
 	mat, err := gocv.IMDecode(img, gocv.IMReadColor)
 	if err != nil {
 		log.Println("Could not IMDecode img", err)
@@ -73,6 +74,7 @@ func (s *Stream) Update() {
 	}
 	go gocv.IMWrite(s.GetCurrentColorInstantPath(), mat)
 
+	// Turn the current image into greyscale and also write that to disk in a goroutine
 	currentGrey := gocv.NewMat()
 	gocv.CvtColor(mat, &currentGrey, gocv.ColorBGRAToGray)
 	gocv.GaussianBlur(currentGrey, &currentGrey, image.Point{X: 21, Y: 21}, 0, 0, gocv.BorderReflect)
@@ -81,7 +83,7 @@ func (s *Stream) Update() {
 	if !s.PreviousInstantPathExists() {
 		return
 	}
-
+	// If there is a previous image saved to disk, calculate the difference between the two and amplify those differences
 	diff := gocv.NewMat()
 	previousGrey := s.IMReadPrevious()
 	gocv.AbsDiff(previousGrey, currentGrey, &diff)
@@ -94,6 +96,7 @@ func (s *Stream) Update() {
 	diff.CopyTo(&debug)
 	gocv.CvtColor(debug, &debug, gocv.ColorGrayToBGRA)
 
+	// Get the contours and check if they are in any of the WatchAreas
 	contours := gocv.FindContours(diff, gocv.RetrievalExternal, gocv.ChainApproxSimple)
 	s.MotionDetected = false
 	for _, watchArea := range s.WatchAreas {