| /* |
| * Copyright (C) 2017 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. |
| */ |
| |
| #define LOG_TAG "VibratorService" |
| |
| #include <log/log.h> |
| |
| #include <hardware/hardware.h> |
| #include <hardware/vibrator.h> |
| |
| #include "Vibrator.h" |
| |
| #include <cinttypes> |
| #include <cmath> |
| #include <iostream> |
| #include <fstream> |
| |
| |
| namespace android { |
| namespace hardware { |
| namespace vibrator { |
| namespace V1_0 { |
| namespace implementation { |
| |
| static constexpr int MAX_VOLTAGE = 3596; |
| static constexpr int MIN_VOLTAGE = 116; |
| |
| Vibrator::Vibrator(std::ofstream&& enable, std::ofstream&& amplitude) : |
| mEnable(std::move(enable)), |
| mAmplitude(std::move(amplitude)) {} |
| |
| // Methods from ::android::hardware::vibrator::V1_0::IVibrator follow. |
| Return<Status> Vibrator::on(uint32_t timeout_ms) { |
| mEnable << timeout_ms << std::endl; |
| if (!mEnable) { |
| ALOGE("Failed to turn vibrator on (%d): %s", errno, strerror(errno)); |
| return Status::UNKNOWN_ERROR; |
| } |
| return Status::OK; |
| } |
| |
| Return<Status> Vibrator::off() { |
| mEnable << 0 << std::endl; |
| if (!mEnable) { |
| ALOGE("Failed to turn vibrator off (%d): %s", errno, strerror(errno)); |
| return Status::UNKNOWN_ERROR; |
| } |
| return Status::OK; |
| } |
| |
| Return<bool> Vibrator::supportsAmplitudeControl() { |
| return true; |
| } |
| |
| Return<Status> Vibrator::setAmplitude(uint8_t amplitude) { |
| if (amplitude == 0) { |
| return Status::BAD_VALUE; |
| } |
| // Scale the voltage such that an amplitude of 1 is MIN_VOLTAGE, an amplitude of 255 is |
| // MAX_VOLTAGE, and there are equal steps for every value in between. |
| long voltage = |
| std::lround((amplitude - 1) / 254.0 * (MAX_VOLTAGE - MIN_VOLTAGE) + MIN_VOLTAGE); |
| ALOGE("Setting amplitude to: %ld", voltage); |
| mAmplitude << voltage << std::endl; |
| if (!mAmplitude) { |
| ALOGE("Failed to set amplitude (%d): %s", errno, strerror(errno)); |
| return Status::UNKNOWN_ERROR; |
| } |
| return Status::OK; |
| } |
| |
| Return<void> Vibrator::perform(Effect, EffectStrength, perform_cb _hidl_cb) { |
| _hidl_cb(Status::UNSUPPORTED_OPERATION, 0); |
| return Void(); |
| } |
| |
| } // namespace implementation |
| } // namespace V1_0 |
| } // namespace vibrator |
| } // namespace hardware |
| } // namespace android |