/*
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* Copyright (C) 2011 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 <math.h>
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#include <sys/types.h>
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#include <utils/Errors.h>
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#include <hardware/sensors.h>
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#include "OrientationSensor.h"
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#include "SensorDevice.h"
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#include "SensorFusion.h"
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namespace android {
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// ---------------------------------------------------------------------------
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OrientationSensor::OrientationSensor() {
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const sensor_t sensor = {
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.name = "Orientation Sensor",
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.vendor = "AOSP",
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.version = 1,
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.handle = '_ypr',
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.type = SENSOR_TYPE_ORIENTATION,
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.maxRange = 360.0f,
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.resolution = 1.0f/256.0f, // FIXME: real value here
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.power = mSensorFusion.getPowerUsage(),
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.minDelay = mSensorFusion.getMinDelay(),
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};
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mSensor = Sensor(&sensor);
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}
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bool OrientationSensor::process(sensors_event_t* outEvent,
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const sensors_event_t& event)
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{
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if (event.type == SENSOR_TYPE_ACCELEROMETER) {
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if (mSensorFusion.hasEstimate()) {
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vec3_t g;
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const float rad2deg = 180 / M_PI;
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const mat33_t R(mSensorFusion.getRotationMatrix());
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g[0] = atan2f(-R[1][0], R[0][0]) * rad2deg;
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g[1] = atan2f(-R[2][1], R[2][2]) * rad2deg;
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g[2] = asinf ( R[2][0]) * rad2deg;
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if (g[0] < 0)
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g[0] += 360;
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*outEvent = event;
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outEvent->orientation.azimuth = g.x;
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outEvent->orientation.pitch = g.y;
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outEvent->orientation.roll = g.z;
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outEvent->orientation.status = SENSOR_STATUS_ACCURACY_HIGH;
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outEvent->sensor = '_ypr';
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outEvent->type = SENSOR_TYPE_ORIENTATION;
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return true;
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}
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}
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return false;
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}
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status_t OrientationSensor::activate(void* ident, bool enabled) {
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return mSensorFusion.activate(FUSION_9AXIS, ident, enabled);
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}
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status_t OrientationSensor::setDelay(void* ident, int /*handle*/, int64_t ns) {
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return mSensorFusion.setDelay(FUSION_9AXIS, ident, ns);
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}
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// ---------------------------------------------------------------------------
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}; // namespace android
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