InputFlinger: Support amplitude control for InputDeviceVibrator
Add support for sending multi-channel rumble amplitudes to input
devices supporting FF_RUMBLE.
Bug: 38511270
Bug: 136215622
Test: Connect a gamepad whose driver supports FF_RUMBLE, find it
with the android input framework, and do something like this:
// waveform where rumble magnitude doubles every 2 seconds
VibrationEffect effect = VibrationEffect.createWaveform(
new long[] { 2000L, 2000L, 2000L, 2000L, 2000L },
new int[] { 16, 32, 64, 128, 255 },
-1);
inputDevice.getVibrator().vibrate(effect);
Change-Id: I2f059e085c106cbca2372c72d09a9f579d35e4c7
diff --git a/services/inputflinger/include/VibrationElement.h b/services/inputflinger/include/VibrationElement.h
new file mode 100644
index 0000000..8a134ee
--- /dev/null
+++ b/services/inputflinger/include/VibrationElement.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _VIBRATION_ELEMENT_H
+#define _VIBRATION_ELEMENT_H
+
+#include <chrono>
+#include <cstdint>
+#include <string>
+#include <vector>
+
+namespace android {
+
+/*
+ * Describes a rumble effect
+ */
+struct VibrationElement {
+ std::chrono::milliseconds duration;
+ std::vector<int> channels;
+
+ void dump(std::string& dump) const;
+ uint16_t getChannel(int id) const;
+ bool isOn() const;
+};
+
+} // namespace android
+
+#endif // _VIBRATION_ELEMENT_H