diff options
Diffstat (limited to 'libs/gui/Sensor.cpp')
-rw-r--r-- | libs/gui/Sensor.cpp | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/libs/gui/Sensor.cpp b/libs/gui/Sensor.cpp new file mode 100644 index 0000000..b1f37ff --- /dev/null +++ b/libs/gui/Sensor.cpp @@ -0,0 +1,185 @@ +/* + * Copyright (C) 2010 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. + */ + +#include <stdint.h> +#include <sys/types.h> + +#include <utils/Errors.h> +#include <utils/String8.h> +#include <utils/Flattenable.h> + +#include <hardware/sensors.h> + +#include <gui/Sensor.h> + +// ---------------------------------------------------------------------------- +namespace android { +// ---------------------------------------------------------------------------- + +Sensor::Sensor() + : mHandle(0), mType(0), + mMinValue(0), mMaxValue(0), mResolution(0), + mPower(0), mMinDelay(0) +{ +} + +Sensor::Sensor(struct sensor_t const* hwSensor) +{ + mName = hwSensor->name; + mVendor = hwSensor->vendor; + mHandle = hwSensor->handle; + mType = hwSensor->type; + mMinValue = 0; // FIXME: minValue + mMaxValue = hwSensor->maxRange; // FIXME: maxValue + mResolution = hwSensor->resolution; + mPower = hwSensor->power; + mMinDelay = hwSensor->minDelay; +} + +Sensor::~Sensor() +{ +} + +const String8& Sensor::getName() const { + return mName; +} + +const String8& Sensor::getVendor() const { + return mVendor; +} + +int32_t Sensor::getHandle() const { + return mHandle; +} + +int32_t Sensor::getType() const { + return mType; +} + +float Sensor::getMinValue() const { + return mMinValue; +} + +float Sensor::getMaxValue() const { + return mMaxValue; +} + +float Sensor::getResolution() const { + return mResolution; +} + +float Sensor::getPowerUsage() const { + return mPower; +} + +int32_t Sensor::getMinDelay() const { + return mMinDelay; +} + +size_t Sensor::getFlattenedSize() const +{ + return sizeof(int32_t) + ((mName.length() + 3) & ~3) + + sizeof(int32_t) + ((mVendor.length() + 3) & ~3) + + sizeof(int32_t) * 2 + + sizeof(float) * 4 + + sizeof(int32_t); +} + +size_t Sensor::getFdCount() const +{ + return 0; +} + +static inline +size_t write(void* buffer, size_t offset, const String8& value) { + memcpy(static_cast<char*>(buffer) + offset, value.string(), value.length()); + return (value.length() + 3) & ~3; +} + +static inline +size_t write(void* buffer, size_t offset, float value) { + *reinterpret_cast<float*>(static_cast<char*>(buffer) + offset) = value; + return sizeof(float); +} + +static inline +size_t write(void* buffer, size_t offset, int32_t value) { + *reinterpret_cast<int32_t*>(static_cast<char*>(buffer) + offset) = value; + return sizeof(int32_t); +} + +status_t Sensor::flatten(void* buffer, size_t size, + int fds[], size_t count) const +{ + if (size < Sensor::getFlattenedSize()) + return -ENOMEM; + + size_t offset = 0; + offset += write(buffer, offset, int32_t(mName.length())); + offset += write(buffer, offset, mName); + offset += write(buffer, offset, int32_t(mVendor.length())); + offset += write(buffer, offset, mVendor); + offset += write(buffer, offset, mHandle); + offset += write(buffer, offset, mType); + offset += write(buffer, offset, mMinValue); + offset += write(buffer, offset, mMaxValue); + offset += write(buffer, offset, mResolution); + offset += write(buffer, offset, mPower); + offset += write(buffer, offset, mMinDelay); + + return NO_ERROR; +} + +static inline +size_t read(void const* buffer, size_t offset, String8* value, int32_t len) { + value->setTo(static_cast<char const*>(buffer) + offset, len); + return (len + 3) & ~3; +} + +static inline +size_t read(void const* buffer, size_t offset, float* value) { + *value = *reinterpret_cast<float const*>(static_cast<char const*>(buffer) + offset); + return sizeof(float); +} + +static inline +size_t read(void const* buffer, size_t offset, int32_t* value) { + *value = *reinterpret_cast<int32_t const*>(static_cast<char const*>(buffer) + offset); + return sizeof(int32_t); +} + +status_t Sensor::unflatten(void const* buffer, size_t size, + int fds[], size_t count) +{ + int32_t len; + size_t offset = 0; + offset += read(buffer, offset, &len); + offset += read(buffer, offset, &mName, len); + offset += read(buffer, offset, &len); + offset += read(buffer, offset, &mVendor, len); + offset += read(buffer, offset, &mHandle); + offset += read(buffer, offset, &mType); + offset += read(buffer, offset, &mMinValue); + offset += read(buffer, offset, &mMaxValue); + offset += read(buffer, offset, &mResolution); + offset += read(buffer, offset, &mPower); + offset += read(buffer, offset, &mMinDelay); + + return NO_ERROR; +} + +// ---------------------------------------------------------------------------- +}; // namespace android |