From ae9fc03bdccda709101291bbcd3beaa5b6daebfc Mon Sep 17 00:00:00 2001 From: Jeff Brown Date: Wed, 18 Aug 2010 15:51:08 -0700 Subject: Add support for throttling motion events. Change-Id: I24b3a17753e91ecda60a60fe5cd2e6b3260e033d --- include/ui/InputDispatcher.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'include') diff --git a/include/ui/InputDispatcher.h b/include/ui/InputDispatcher.h index 2505cb0..aed4fa1 100644 --- a/include/ui/InputDispatcher.h +++ b/include/ui/InputDispatcher.h @@ -159,6 +159,12 @@ public: virtual int32_t waitForMotionEventTargets(MotionEvent* motionEvent, uint32_t policyFlags, int32_t injectorPid, int32_t injectorUid, Vector& outTargets) = 0; + + /* Gets the maximum suggested event delivery rate per second. + * This value is used to throttle motion event movement actions on a per-device + * basis. It is not intended to be a hard limit. + */ + virtual int32_t getMaxEventsPerSecond() = 0; }; @@ -332,6 +338,8 @@ private: // Linked list of motion samples associated with this motion event. MotionSample firstSample; MotionSample* lastSample; + + uint32_t countSamples() const; }; // Tracks the progress of dispatching a particular event to a particular connection. @@ -587,6 +595,17 @@ private: Condition mInjectionSyncFinishedCondition; void decrementPendingSyncDispatchesLocked(EventEntry* entry); + // Throttling state. + struct ThrottleState { + nsecs_t minTimeBetweenEvents; + + nsecs_t lastEventTime; + int32_t lastDeviceId; + uint32_t lastSource; + + uint32_t originalSampleCount; // only collected during debugging + } mThrottleState; + // Key repeat tracking. // XXX Move this up to the input reader instead. struct KeyRepeatState { -- cgit v1.1