tree 2e96b54a039a917cb0b4b13f318500e3b5f39396
parent f6989da7c7727ad433b75ad2c8d8d23c2651f70b
author Jeff Brown <jeffbrown@google.com> 1302201489 -0700
committer Jeff Brown <jeffbrown@google.com> 1302207076 -0700

Coalesce input events that arrive faster than 333Hz.

Some drivers report individual finger updates one at a time
instead of all at once.  When 10 fingers are down, this can
cause the framework to have to handle 10 times as many events
each with 10 times as much data.  Applications like
PointerLocation would get significantly bogged down by all
of the redundant samples.

This change coalesces samples that are closely spaced in time,
before they are dispatched, as part of the motion event batching
protocol.

Increased the size of the InputChannel shared memory buffer so
that applications can catch up faster if they accumulate a
backlog of samples.

Added logging code to help measure input dispatch and drawing
latency issues in the view hierarchy.  See ViewDebug.DEBUG_LATENCY.

Change-Id: Ia5898f781f19901d2225c529a910c32bdf4f504f