am de18f6c3: InputResampling: Don\'t extrapolate for very low frame rates. (6c51a07d) · Commits · e / os / android_frameworks_native-old

libs/input/InputTransport.cpp

+11 −2

Original line number	Diff line number	Diff line
		@@ -51,6 +51,10 @@ static const nsecs_t RESAMPLE_LATENCY = 5 * NANOS_PER_MS;
		// Minimum time difference between consecutive samples before attempting to resample.
		static const nsecs_t RESAMPLE_MIN_DELTA = 2 * NANOS_PER_MS;

		// Maximum time difference between consecutive samples before attempting to resample
		// by extrapolation.
		static const nsecs_t RESAMPLE_MAX_DELTA = 20 * NANOS_PER_MS;

		// Maximum time to predict forward from the last known state, to avoid predicting too
		// far into the future. This time is further bounded by 50% of the last time delta.
		static const nsecs_t RESAMPLE_MAX_PREDICTION = 8 * NANOS_PER_MS;
		@@ -724,7 +728,7 @@ void InputConsumer::resampleTouchState(nsecs_t sampleTime, MotionEvent* event,
		nsecs_t delta = future.eventTime - current->eventTime;
		if (delta < RESAMPLE_MIN_DELTA) {
		#if DEBUG_RESAMPLING
		ALOGD("Not resampled, delta time is %lld ns.", delta);
		ALOGD("Not resampled, delta time is too small: %lld ns.", delta);
		#endif
		return;
		}
		@@ -736,7 +740,12 @@ void InputConsumer::resampleTouchState(nsecs_t sampleTime, MotionEvent* event,
		nsecs_t delta = current->eventTime - other->eventTime;
		if (delta < RESAMPLE_MIN_DELTA) {
		#if DEBUG_RESAMPLING
		ALOGD("Not resampled, delta time is %lld ns.", delta);
		ALOGD("Not resampled, delta time is too small: %lld ns.", delta);
		#endif
		return;
		} else if (delta > RESAMPLE_MAX_DELTA) {
		#if DEBUG_RESAMPLING
		ALOGD("Not resampled, delta time is too large: %lld ns.", delta);
		#endif
		return;
		}