Merge "BluetoothMidi: request higher priority, for lower latency" into oc-dev (8a99d67d) · Commits · e / os / android_frameworks_base

media/packages/BluetoothMidiService/src/com/android/bluetoothmidiservice/BluetoothMidiDevice.java

+20 −20

Original line number	Diff line number	Diff line
		@@ -100,8 +100,8 @@ public final class BluetoothMidiDevice {
		int newState) {
		String intentAction;
		if (newState == BluetoothProfile.STATE_CONNECTED) {
		Log.i(TAG, "Connected to GATT server.");
		Log.i(TAG, "Attempting to start service discovery:" +
		Log.d(TAG, "Connected to GATT server.");
		Log.d(TAG, "Attempting to start service discovery:" +
		mBluetoothGatt.discoverServices());
		} else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
		Log.i(TAG, "Disconnected from GATT server.");
		@@ -112,24 +112,24 @@ public final class BluetoothMidiDevice {
		@Override
		public void onServicesDiscovered(BluetoothGatt gatt, int status) {
		if (status == BluetoothGatt.GATT_SUCCESS) {
		List<BluetoothGattService> services = mBluetoothGatt.getServices();
		for (BluetoothGattService service : services) {
		if (MIDI_SERVICE.equals(service.getUuid())) {
		BluetoothGattService service = gatt.getService(MIDI_SERVICE);
		if (service != null) {
		Log.d(TAG, "found MIDI_SERVICE");
		List<BluetoothGattCharacteristic> characteristics
		= service.getCharacteristics();
		for (BluetoothGattCharacteristic characteristic : characteristics) {
		if (MIDI_CHARACTERISTIC.equals(characteristic.getUuid())) {
		BluetoothGattCharacteristic characteristic
		= service.getCharacteristic(MIDI_CHARACTERISTIC);
		if (characteristic != null) {
		Log.d(TAG, "found MIDI_CHARACTERISTIC");
		mCharacteristic = characteristic;

		// Request a lower Connection Interval for better latency.
		boolean result = gatt.requestConnectionPriority(
		BluetoothGatt.CONNECTION_PRIORITY_HIGH);
		Log.d(TAG, "requestConnectionPriority(CONNECTION_PRIORITY_HIGH):"
		+ result);

		// Specification says to read the characteristic first and then
		// switch to receiving notifications
		mBluetoothGatt.readCharacteristic(characteristic);
		break;
		}
		}
		break;
		}
		}
		} else {