Bluetooth: rename to BluetoothHandlers.

2023-11-05 15:34:02 +01:00
parent f2594371d3
commit 15f3ccbcbd
14 changed files with 43 additions and 43 deletions
@@ -0,0 +1,79 @@
+package de.dennisguse.opentracks.sensors;
+
+import android.bluetooth.BluetoothGattCharacteristic;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.VisibleForTesting;
+
+import java.util.List;
+import java.util.UUID;
+
+import de.dennisguse.opentracks.sensors.sensorData.SensorDataCyclingCadence;
+import de.dennisguse.opentracks.sensors.sensorData.SensorDataCyclingCadenceAndDistanceSpeed;
+import de.dennisguse.opentracks.sensors.sensorData.SensorDataCyclingDistanceSpeed;
+import de.dennisguse.opentracks.sensors.sensorData.SensorHandlerInterface;
+
+public class BluetoothHandlerCyclingDistanceSpeed implements SensorHandlerInterface {
+
+    public static final ServiceMeasurementUUID CYCLING_SPEED_CADENCE = new ServiceMeasurementUUID(
+            new UUID(0x181600001000L, 0x800000805f9b34fbL),
+            new UUID(0x2A5B00001000L, 0x800000805f9b34fbL)
+    );
+
+    @Override
+    public List<ServiceMeasurementUUID> getServices() {
+        return List.of(CYCLING_SPEED_CADENCE);
+    }
+
+    @Override
+    public SensorDataCyclingDistanceSpeed createEmptySensorData(String address) {
+        return new SensorDataCyclingDistanceSpeed(address);
+    }
+
+    @Override
+    public void handlePayload(SensorManager.SensorDataChangedObserver observer, ServiceMeasurementUUID serviceMeasurementUUID, String sensorName, String address, BluetoothGattCharacteristic characteristic) {
+        SensorDataCyclingCadenceAndDistanceSpeed cadenceAndSpeed = parseCyclingCrankAndWheel(address, sensorName, characteristic);
+        if (cadenceAndSpeed == null) {
+            return;
+        }
+
+        if (cadenceAndSpeed.getDistanceSpeed() != null) {
+            observer.onChange(cadenceAndSpeed.getDistanceSpeed());
+        }
+    }
+
+
+    @VisibleForTesting(otherwise = VisibleForTesting.PACKAGE_PRIVATE)
+    public static SensorDataCyclingCadenceAndDistanceSpeed parseCyclingCrankAndWheel(String address, String sensorName, @NonNull BluetoothGattCharacteristic characteristic) {
+        // DOCUMENTATION https://www.bluetooth.com/wp-content/uploads/Sitecore-Media-Library/Gatt/Xml/Characteristics/org.bluetooth.characteristic.csc_measurement.xml
+        int valueLength = characteristic.getValue().length;
+        if (valueLength == 0) {
+            return null;
+        }
+
+        int flags = characteristic.getValue()[0];
+        boolean hasWheel = (flags & 0x01) > 0;
+        boolean hasCrank = (flags & 0x02) > 0;
+
+        int index = 1;
+        SensorDataCyclingDistanceSpeed speed = null;
+        if (hasWheel && valueLength - index >= 6) {
+            int wheelTotalRevolutionCount = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT32, index);
+            index += 4;
+            int wheelTime = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT16, index); // 1/1024s
+            speed = new SensorDataCyclingDistanceSpeed(address, sensorName, wheelTotalRevolutionCount, wheelTime);
+            index += 2;
+        }
+
+        SensorDataCyclingCadence cadence = null;
+        if (hasCrank && valueLength - index >= 4) {
+            long crankCount = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT16, index);
+            index += 2;
+
+            int crankTime = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT16, index); // 1/1024s
+            cadence = new SensorDataCyclingCadence(address, sensorName, crankCount, crankTime);
+        }
+
+        return new SensorDataCyclingCadenceAndDistanceSpeed(address, sensorName, cadence, speed);
+    }
+}