Parse runtime from HID tracker

server/core/src/main/java/dev/slimevr/protocol/datafeed/DataFeedBuilder.java

@@ -310,6 +310,9 @@ public class DataFeedBuilder {
 			HardwareStatus.addRssi(fbb, (short) tracker.getSignalStrength().floatValue());
 		}
 
+		if (tracker.getBatteryRemainingRuntime() != null) {
+			HardwareStatus.addBatteryRuntimeEstimate(fbb, tracker.getBatteryRemainingRuntime());
+		}
 
 		int hardwareDataOffset = HardwareStatus.endHardwareStatus(fbb);
 		int hardwareInfoOffset = DataFeedBuilder.createHardwareInfo(fbb, device);

server/core/src/main/java/dev/slimevr/tracking/trackers/Tracker.kt

@@ -112,6 +112,7 @@ class Tracker @JvmOverloads constructor(
 	val trackerFlexHandler: TrackerFlexHandler = TrackerFlexHandler(this)
 	var batteryVoltage: Float? = null
 	var batteryLevel: Float? = null
+	var batteryRemainingRuntime: Long? = null
 	var ping: Int? = null
 	var signalStrength: Int? = null
 	var temperature: Float? = null

server/core/src/main/java/dev/slimevr/tracking/trackers/hid/HIDCommon.kt

@@ -138,6 +138,7 @@ class HIDCommon {
 			}
 
 			// Packet data
+			var runtime: Long? = null
 			var batt: Int? = null
 			var batt_v: Int? = null
 			var temp: Int? = null
@@ -221,6 +222,11 @@ class HIDCommon {
 					}
 				}
 
+				5 -> { // runtime
+					// ulong as little endian
+					runtime = (dataReceived[i + 9].toUByte().toLong() shl 56) or (dataReceived[i + 8].toUByte().toLong() shl 48) or (dataReceived[i + 7].toUByte().toLong() shl 40) or (dataReceived[i + 6].toUByte().toLong() shl 32) or (dataReceived[i + 5].toUByte().toLong() shl 24) or (dataReceived[i + 4].toUByte().toLong() shl 16) or (dataReceived[i + 3].toUByte().toLong() shl 8) or dataReceived[i + 2].toUByte().toLong()
+				}
+
 				6 -> { // data
 					button = dataReceived[i + 2].toUByte().toInt()
 					rssi = dataReceived[i + 15].toUByte().toInt()
@@ -248,6 +254,9 @@ class HIDCommon {
 			}
 
 			// Assign data
+			if (runtime != null) {
+				tracker.batteryRemainingRuntime = runtime
+			}
 			if (batt != null) {
 				tracker.batteryLevel = if (batt == 128) 1f else (batt and 127).toFloat()
 			}