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/*
* Copyright (C) 2018 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.
*/
//Author := dev_harsh1998, Isaac Chen
#define LOG_TAG "android.hardware.light@2.0-service.xiaomi_wayne"
#include <log/log.h>
#include <fstream>
#include "Light.h"
namespace android {
namespace hardware {
namespace light {
namespace V2_0 {
namespace implementation {
#define LEDS "/sys/class/leds/"
#define LCD_LED LEDS "lcd-backlight/"
#define BRIGHTNESS "brightness"
#define RED LEDS "red/"
#define BLINK "blink"
/*
* Write value to path and close file.
*/
static void set(std::string path, std::string value) {
std::ofstream file(path);
/* Only write brightness value if stream is open, alive & well */
if (file.is_open()) {
file << value;
} else {
/* Fire a warning a bail out */
ALOGE("failed to write %s to %s", value.c_str(), path.c_str());
return;
}
}
static void set(std::string path, int value) {
set(path, std::to_string(value));
}
static void handleWayneBacklight(const LightState& state) {
uint32_t brightness = state.color & 0xFF;
set(LCD_LED BRIGHTNESS, brightness);
}
static void handleWayneNotification(const LightState& state) {
uint32_t redBrightness, brightness, blink;
/*
* Extract brightness from RGB.
*/
redBrightness = (state.color >> 16) & 0xFF;
brightness = (state.color >> 24) & 0xFF;
/*
* Scale RGB brightness if the Alpha brightness is not 0xFF.
*/
if (brightness != 0xFF) {
redBrightness = (redBrightness * brightness) / 0xFF;
}
/* Turn off the leds (initially) */
set(RED BRIGHTNESS, 0);
set(RED BLINK, 0);
if (state.flashMode == Flash::TIMED) {
uint32_t onMS = state.flashOnMs;
uint32_t offMS = state.flashOffMs;
if (onMS > 0 && offMS > 0) {
blink = 1;
} else {
blink = 0;
}
/* Red(Actually White) */
set(RED BLINK, blink);
set(RED BRIGHTNESS, 0);
} else {
set(RED BRIGHTNESS, redBrightness);
}
}
static std::map<Type, std::function<void(const LightState&)>> lights = {
{Type::BACKLIGHT, handleWayneBacklight},
{Type::NOTIFICATIONS, handleWayneNotification},
{Type::BATTERY, handleWayneNotification},
{Type::ATTENTION, handleWayneNotification},
};
Light::Light() {}
Return<Status> Light::setLight(Type type, const LightState& state) {
auto it = lights.find(type);
if (it == lights.end()) {
return Status::LIGHT_NOT_SUPPORTED;
}
/*
* Lock global mutex until light state is updated.
*/
std::lock_guard<std::mutex> lock(globalLock);
it->second(state);
return Status::SUCCESS;
}
Return<void> Light::getSupportedTypes(getSupportedTypes_cb _hidl_cb) {
std::vector<Type> types;
for (auto const& light : lights) types.push_back(light.first);
_hidl_cb(types);
return Void();
}
} // namespace implementation
} // namespace V2_0
} // namespace light
} // namespace hardware
} // namespace android
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