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am de18f6c3: InputResampling: Don\'t extrapolate for very low frame rates.

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* commit 'de18f6c32add6fb22065807a00ddc88b363df527':
  InputResampling: Don't extrapolate for very low frame rates.
This commit is contained in:
Andrew de los Reyes 2015-10-02 02:12:59 +00:00 committed by Android Git Automerger
commit 6c51a07d30
1 changed files with 11 additions and 2 deletions
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13
libs/input/InputTransport.cpp
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@ -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;
}