From 8dee1f0d80a31d7890bdb02ffc7c80007560b184 Mon Sep 17 00:00:00 2001
From: Cameron Gutman <aicommander@gmail.com>
Date: Wed, 19 Nov 2014 23:59:42 -0800
Subject: [PATCH] Add a trigger deadzone

---
 .../binding/input/ControllerHandler.java      | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/app/src/main/java/com/limelight/binding/input/ControllerHandler.java b/app/src/main/java/com/limelight/binding/input/ControllerHandler.java
index 6dadce3b..847d61ff 100644
--- a/app/src/main/java/com/limelight/binding/input/ControllerHandler.java
+++ b/app/src/main/java/com/limelight/binding/input/ControllerHandler.java
@@ -171,6 +171,21 @@ public class ControllerHandler {
             mapping.rightStickDeadzoneRadius = (float) stickDeadzone;
         }
 
+        if (mapping.leftTriggerAxis != -1 && mapping.rightTriggerAxis != -1) {
+            InputDevice.MotionRange ltRange = getMotionRangeForJoystickAxis(dev, mapping.leftTriggerAxis);
+            InputDevice.MotionRange rtRange = getMotionRangeForJoystickAxis(dev, mapping.rightTriggerAxis);
+
+            // It's important to have a valid deadzone so controller packet batching works properly
+            mapping.triggerDeadzone = Math.max(Math.abs(ltRange.getFlat()), Math.abs(rtRange.getFlat()));
+
+            // For triggers without (valid) deadzones, we'll use 10%
+            if (mapping.triggerDeadzone <= 0.02 ||
+                mapping.triggerDeadzone > 0.30)
+            {
+                mapping.triggerDeadzone = 0.1f;
+            }
+        }
+
         /*
         FIXME: This is broken on SHIELD
 
@@ -370,6 +385,13 @@ public class ControllerHandler {
                 rt = (rt + 1) / 2;
             }
 
+            if (lt <= mapping.triggerDeadzone) {
+                lt = 0;
+            }
+            if (rt <= mapping.triggerDeadzone) {
+                rt = 0;
+            }
+
             leftTrigger = (byte)(lt * 0xFF);
             rightTrigger = (byte)(rt * 0xFF);
         }
@@ -680,6 +702,7 @@ public class ControllerHandler {
 		public int leftTriggerAxis = -1;
 		public int rightTriggerAxis = -1;
 		public boolean triggersIdleNegative;
+        public float triggerDeadzone;
 		
 		public int hatXAxis = -1;
 		public int hatYAxis = -1;