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* Copyright (C) 2015 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#ifndef ACTIVITY_H_
#define ACTIVITY_H_
#include <hardware/activity_recognition.h>
#include <media/stagefright/foundation/ABase.h>
#include <utils/KeyedVector.h>
#include <utils/Vector.h>
#include "activityeventhandler.h"
#include "hubconnection.h"
namespace android {
class ActivityContext : public ActivityEventHandler {
activity_recognition_device_t device;
explicit ActivityContext(const struct hw_module_t *module);
bool getHubAlive();
void registerActivityCallback(
const activity_recognition_callback_procs_t *callback);
int enableActivityEvent(uint32_t activity_handle,
uint32_t event_type, int64_t max_report_latency_ns);
int disableActivityEvent(uint32_t activity_handle, uint32_t event_type);
int flush();
// ActivityEventHandler interface.
virtual void OnActivityEvent(int sensorIndex, uint8_t eventIndex,
uint64_t whenNs) override;
virtual void OnFlush() override;
virtual void OnSensorHubReset() override;
android::sp<android::HubConnection> mHubConnection;
android::Mutex mCallbackLock;
const activity_recognition_callback_procs_t *mCallback;
struct ActivityEvent {
uint8_t eventIndex;
int sensorIndex;
uint64_t whenNs;
// Whether or not the newest published event index is known. When the AR HAL
// is initially started this is set to false to allow any event index from
// the sensor hub. It is also set to false when a hub reset occurs.
bool mNewestPublishedEventIndexIsKnown;
// The index of the newest published event. The next event from the sensor
// hub must follow this event or else it will be pushed into a list of
// events to be published once the gap in events has been received.
uint8_t mNewestPublishedEventIndex;
// The timestamp of the most recently published event. If the absolute value
// of the delta of the next timestamp to the current timestamp is below some
// threshold, this timestamp will be reused. This is used to ensure that
// activity transitions share the same timestamp and works around agressive
// AP->ContextHub time synchronization mechansims.
uint64_t mNewestPublishedTimestamp;
// The list of unpublished events. These are published once the next
// event arrives and is greater than mNewestPublishedEventIndex by 1
// (wrapping across 255).
Vector<ActivityEvent> mUnpublishedEvents;
// Track the number of flush events sent to the sensor hub.
int mOutstandingFlushEvents;
// Publishes remaining unpublished events.
void PublishUnpublishedEvents();
// Publishes an AR event to the AR HAL client.
void PublishEvent(const ActivityEvent& event);
// Searches for very old AR events, discards them and publishes EVENT_EXIT
// transitions for all activities.
void DiscardExpiredUnpublishedEvents(uint64_t whenNs);
} // namespace android
#endif // ACTIVITY_H_