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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ANDROID_SENSOR_INTERFACE_H
     18 #define ANDROID_SENSOR_INTERFACE_H
     19 
     20 #include <stdint.h>
     21 #include <sys/types.h>
     22 
     23 #include <gui/Sensor.h>
     24 
     25 #include "SensorDevice.h"
     26 
     27 // ---------------------------------------------------------------------------
     28 
     29 namespace android {
     30 // ---------------------------------------------------------------------------
     31 
     32 class SensorInterface {
     33 public:
     34     virtual ~SensorInterface();
     35 
     36     virtual bool process(sensors_event_t* outEvent,
     37             const sensors_event_t& event) = 0;
     38 
     39     virtual status_t activate(void* ident, bool enabled) = 0;
     40     virtual status_t setDelay(void* ident, int handle, int64_t ns) = 0;
     41 
     42     // Not all sensors need to support batching.
     43     virtual status_t batch(void* ident, int handle, int flags, int64_t samplingPeriodNs,
     44                            int64_t maxBatchReportLatencyNs) {
     45         if (maxBatchReportLatencyNs == 0) {
     46             return setDelay(ident, handle, samplingPeriodNs);
     47         }
     48         return -EINVAL;
     49     }
     50 
     51     virtual status_t flush(void* ident, int handle) {
     52         return -EINVAL;
     53     }
     54 
     55     virtual Sensor getSensor() const = 0;
     56     virtual bool isVirtual() const = 0;
     57     virtual void autoDisable(void *ident, int handle) { }
     58 };
     59 
     60 // ---------------------------------------------------------------------------
     61 
     62 class HardwareSensor : public SensorInterface
     63 {
     64     SensorDevice& mSensorDevice;
     65     Sensor mSensor;
     66 
     67 public:
     68     HardwareSensor(const sensor_t& sensor);
     69 
     70     virtual ~HardwareSensor();
     71 
     72     virtual bool process(sensors_event_t* outEvent,
     73             const sensors_event_t& event);
     74 
     75     virtual status_t activate(void* ident, bool enabled);
     76     virtual status_t batch(void* ident, int handle, int flags, int64_t samplingPeriodNs,
     77                            int64_t maxBatchReportLatencyNs);
     78     virtual status_t setDelay(void* ident, int handle, int64_t ns);
     79     virtual status_t flush(void* ident, int handle);
     80     virtual Sensor getSensor() const;
     81     virtual bool isVirtual() const { return false; }
     82     virtual void autoDisable(void *ident, int handle);
     83 };
     84 
     85 
     86 // ---------------------------------------------------------------------------
     87 }; // namespace android
     88 
     89 #endif // ANDROID_SENSOR_INTERFACE_H
     90