CLI flag for timeoverlay

README.md

@@ -23,14 +23,23 @@ To build and run the program, execute:
 $ mvn javafx:run
 ```
 
+Note: JDK 13 and Maven need to be installed.
+
 ### Running the provided JAR
 
 ```
 $ java -jar usb-camera-streamer.jar --delay=500
 ```
 
 
-Note: JDK 13 and Maven need to be installed.
+#### Parameters
+
+All parameters are optional have sensible defaults.
+
+| Parameter        | Explanation     | default      | Example  |
+| ------------- |:-------------:| -----:|
+| delay      | delay of the mirrior image in ms | 0 | --delay=500 |
+| timeoverlay      | whether to display the timeoverlay for debugging      | off | --timeoverlay=true (any value will activate) |
 
 ## Default Operation
 

src/main/java/dev/wittek/usbcamerastreamer/CameraStreamer.java

@@ -78,10 +78,16 @@ private String buildPipelineDescription() {
 
         String transformations =
                 "! videobalance saturation=0.0 " +
-                "! videoflip method=horizontal-flip " +
-                "! timeoverlay halignment=center valignment=center " + // TODO: toggle by CLI flag
-                "! videobox top=200 bottom=200 left=355 right=355 " + // TODO: make configurable
+                "! videoflip method=horizontal-flip ";
+
+        if (getParameters().getNamed().containsKey("timeoverlay")) {
+            String timerOverlay = "! timeoverlay halignment=center valignment=center ";
+            transformations += timerOverlay;
+        }
+
+        transformations += "! videobox top=200 bottom=200 left=355 right=355 " + // TODO: make configurable
                 "! videoscale ";
+
         descriptionBuilder.append(transformations);
 
         if (getParameters().getNamed().containsKey("delay")) {