300 lines
9.2 KiB
C++
300 lines
9.2 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdint.h>
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#include <sys/types.h>
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#include <utils/Errors.h>
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#include <utils/String8.h>
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#include <utils/Flattenable.h>
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#include <hardware/sensors.h>
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#include <gui/Sensor.h>
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// ----------------------------------------------------------------------------
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namespace android {
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// ----------------------------------------------------------------------------
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Sensor::Sensor()
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: mHandle(0), mType(0),
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mMinValue(0), mMaxValue(0), mResolution(0),
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mPower(0), mMinDelay(0), mFifoReservedEventCount(0), mFifoMaxEventCount(0)
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{
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}
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Sensor::Sensor(struct sensor_t const* hwSensor, int halVersion)
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{
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mName = hwSensor->name;
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mVendor = hwSensor->vendor;
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mVersion = hwSensor->version;
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mHandle = hwSensor->handle;
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mType = hwSensor->type;
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mMinValue = 0; // FIXME: minValue
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mMaxValue = hwSensor->maxRange; // FIXME: maxValue
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mResolution = hwSensor->resolution;
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mPower = hwSensor->power;
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mMinDelay = hwSensor->minDelay;
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// Set fifo event count zero for older devices which do not support batching. Fused
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// sensors also have their fifo counts set to zero.
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if (halVersion >= SENSORS_DEVICE_API_VERSION_1_1) {
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mFifoReservedEventCount = hwSensor->fifoReservedEventCount;
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mFifoMaxEventCount = hwSensor->fifoMaxEventCount;
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}
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// Ensure existing sensors have correct string type and required
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// permissions.
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switch (mType) {
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case SENSOR_TYPE_ACCELEROMETER:
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mStringType = SENSOR_STRING_TYPE_ACCELEROMETER;
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break;
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case SENSOR_TYPE_AMBIENT_TEMPERATURE:
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mStringType = SENSOR_STRING_TYPE_AMBIENT_TEMPERATURE;
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break;
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case SENSOR_TYPE_GAME_ROTATION_VECTOR:
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mStringType = SENSOR_STRING_TYPE_GAME_ROTATION_VECTOR;
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break;
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case SENSOR_TYPE_GEOMAGNETIC_ROTATION_VECTOR:
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mStringType = SENSOR_STRING_TYPE_GEOMAGNETIC_ROTATION_VECTOR;
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break;
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case SENSOR_TYPE_GRAVITY:
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mStringType = SENSOR_STRING_TYPE_GRAVITY;
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break;
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case SENSOR_TYPE_GYROSCOPE:
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mStringType = SENSOR_STRING_TYPE_GYROSCOPE;
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break;
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case SENSOR_TYPE_GYROSCOPE_UNCALIBRATED:
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mStringType = SENSOR_STRING_TYPE_GYROSCOPE_UNCALIBRATED;
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break;
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case SENSOR_TYPE_HEART_RATE:
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mStringType = SENSOR_STRING_TYPE_HEART_RATE;
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mRequiredPermission = SENSOR_PERMISSION_BODY_SENSORS;
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break;
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case SENSOR_TYPE_LIGHT:
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mStringType = SENSOR_STRING_TYPE_LIGHT;
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break;
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case SENSOR_TYPE_LINEAR_ACCELERATION:
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mStringType = SENSOR_STRING_TYPE_LINEAR_ACCELERATION;
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break;
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case SENSOR_TYPE_MAGNETIC_FIELD:
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mStringType = SENSOR_STRING_TYPE_MAGNETIC_FIELD;
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break;
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case SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED:
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mStringType = SENSOR_STRING_TYPE_MAGNETIC_FIELD_UNCALIBRATED;
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break;
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case SENSOR_TYPE_ORIENTATION:
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mStringType = SENSOR_STRING_TYPE_ORIENTATION;
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break;
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case SENSOR_TYPE_PRESSURE:
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mStringType = SENSOR_STRING_TYPE_PRESSURE;
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break;
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case SENSOR_TYPE_PROXIMITY:
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mStringType = SENSOR_STRING_TYPE_PROXIMITY;
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break;
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case SENSOR_TYPE_RELATIVE_HUMIDITY:
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mStringType = SENSOR_STRING_TYPE_RELATIVE_HUMIDITY;
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break;
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case SENSOR_TYPE_ROTATION_VECTOR:
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mStringType = SENSOR_STRING_TYPE_ROTATION_VECTOR;
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break;
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case SENSOR_TYPE_SIGNIFICANT_MOTION:
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mStringType = SENSOR_STRING_TYPE_SIGNIFICANT_MOTION;
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break;
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case SENSOR_TYPE_STEP_COUNTER:
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mStringType = SENSOR_STRING_TYPE_STEP_COUNTER;
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break;
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case SENSOR_TYPE_STEP_DETECTOR:
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mStringType = SENSOR_STRING_TYPE_STEP_DETECTOR;
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break;
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case SENSOR_TYPE_TEMPERATURE:
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mStringType = SENSOR_STRING_TYPE_TEMPERATURE;
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break;
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default:
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// Only pipe the stringType and requiredPermission for custom sensors.
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if (halVersion >= SENSORS_DEVICE_API_VERSION_1_2 && hwSensor->stringType) {
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mStringType = hwSensor->stringType;
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}
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if (halVersion >= SENSORS_DEVICE_API_VERSION_1_2 && hwSensor->requiredPermission) {
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mRequiredPermission = hwSensor->requiredPermission;
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}
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break;
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}
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}
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Sensor::~Sensor()
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{
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}
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const String8& Sensor::getName() const {
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return mName;
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}
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const String8& Sensor::getVendor() const {
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return mVendor;
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}
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int32_t Sensor::getHandle() const {
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return mHandle;
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}
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int32_t Sensor::getType() const {
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return mType;
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}
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float Sensor::getMinValue() const {
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return mMinValue;
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}
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float Sensor::getMaxValue() const {
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return mMaxValue;
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}
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float Sensor::getResolution() const {
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return mResolution;
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}
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float Sensor::getPowerUsage() const {
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return mPower;
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}
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int32_t Sensor::getMinDelay() const {
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return mMinDelay;
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}
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nsecs_t Sensor::getMinDelayNs() const {
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return getMinDelay() * 1000;
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}
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int32_t Sensor::getVersion() const {
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return mVersion;
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}
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int32_t Sensor::getFifoReservedEventCount() const {
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return mFifoReservedEventCount;
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}
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int32_t Sensor::getFifoMaxEventCount() const {
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return mFifoMaxEventCount;
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}
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const String8& Sensor::getStringType() const {
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return mStringType;
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}
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const String8& Sensor::getRequiredPermission() const {
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return mRequiredPermission;
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}
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size_t Sensor::getFlattenedSize() const
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{
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size_t fixedSize =
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sizeof(int32_t) * 3 +
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sizeof(float) * 4 +
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sizeof(int32_t) * 3;
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size_t variableSize =
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sizeof(uint32_t) + FlattenableUtils::align<4>(mName.length()) +
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sizeof(uint32_t) + FlattenableUtils::align<4>(mVendor.length()) +
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sizeof(uint32_t) + FlattenableUtils::align<4>(mStringType.length()) +
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sizeof(uint32_t) + FlattenableUtils::align<4>(mRequiredPermission.length());
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return fixedSize + variableSize;
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}
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status_t Sensor::flatten(void* buffer, size_t size) const {
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if (size < getFlattenedSize()) {
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return NO_MEMORY;
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}
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flattenString8(buffer, size, mName);
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flattenString8(buffer, size, mVendor);
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FlattenableUtils::write(buffer, size, mVersion);
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FlattenableUtils::write(buffer, size, mHandle);
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FlattenableUtils::write(buffer, size, mType);
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FlattenableUtils::write(buffer, size, mMinValue);
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FlattenableUtils::write(buffer, size, mMaxValue);
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FlattenableUtils::write(buffer, size, mResolution);
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FlattenableUtils::write(buffer, size, mPower);
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FlattenableUtils::write(buffer, size, mMinDelay);
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FlattenableUtils::write(buffer, size, mFifoReservedEventCount);
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FlattenableUtils::write(buffer, size, mFifoMaxEventCount);
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flattenString8(buffer, size, mStringType);
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flattenString8(buffer, size, mRequiredPermission);
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return NO_ERROR;
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}
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status_t Sensor::unflatten(void const* buffer, size_t size) {
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if (!unflattenString8(buffer, size, mName)) {
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return NO_MEMORY;
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}
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if (!unflattenString8(buffer, size, mVendor)) {
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return NO_MEMORY;
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}
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size_t fixedSize =
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sizeof(int32_t) * 3 +
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sizeof(float) * 4 +
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sizeof(int32_t) * 3;
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if (size < fixedSize) {
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return NO_MEMORY;
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}
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FlattenableUtils::read(buffer, size, mVersion);
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FlattenableUtils::read(buffer, size, mHandle);
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FlattenableUtils::read(buffer, size, mType);
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FlattenableUtils::read(buffer, size, mMinValue);
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FlattenableUtils::read(buffer, size, mMaxValue);
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FlattenableUtils::read(buffer, size, mResolution);
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FlattenableUtils::read(buffer, size, mPower);
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FlattenableUtils::read(buffer, size, mMinDelay);
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FlattenableUtils::read(buffer, size, mFifoReservedEventCount);
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FlattenableUtils::read(buffer, size, mFifoMaxEventCount);
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if (!unflattenString8(buffer, size, mStringType)) {
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return NO_MEMORY;
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}
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if (!unflattenString8(buffer, size, mRequiredPermission)) {
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return NO_MEMORY;
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}
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return NO_ERROR;
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}
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void Sensor::flattenString8(void*& buffer, size_t& size,
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const String8& string8) {
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uint32_t len = string8.length();
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FlattenableUtils::write(buffer, size, len);
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memcpy(static_cast<char*>(buffer), string8.string(), len);
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FlattenableUtils::advance(buffer, size, FlattenableUtils::align<4>(len));
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}
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bool Sensor::unflattenString8(void const*& buffer, size_t& size, String8& outputString8) {
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uint32_t len;
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if (size < sizeof(len)) {
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return false;
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}
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FlattenableUtils::read(buffer, size, len);
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if (size < len) {
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return false;
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}
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outputString8.setTo(static_cast<char const*>(buffer), len);
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FlattenableUtils::advance(buffer, size, FlattenableUtils::align<4>(len));
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return true;
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}
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// ----------------------------------------------------------------------------
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}; // namespace android
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