Cache frame event history producer-side.

* Producer maintains a recent history of frames.
* Producer only does a binder call if requested
    informatiVon doesn't exist in the cache.
* Consumer sends fences to the producer, which
    can be queried for timestamps without a
    binder call.

Test: adb shell /data/nativetest/libgui_test/libgui_test
--gtest_filter=*GetFrameTimestamps*

Change-Id: I8a64579407cc2935f5c659462cb227b07ba27e43

1 files changed, 4 insertions, 6 deletions

diff --git a/libs/gui/BufferQueue.cpp b/libs/gui/BufferQueue.cpp
index 6d4335e460..f76a282af6 100644
--- a/libs/gui/BufferQueue.cpp
+++ b/libs/gui/BufferQueue.cpp
@@ -61,15 +61,13 @@ void BufferQueue::ProxyConsumerListener::onSidebandStreamChanged() {
     }
 }
 
-bool BufferQueue::ProxyConsumerListener::addAndGetFrameTimestamps(
+void BufferQueue::ProxyConsumerListener::addAndGetFrameTimestamps(
         const NewFrameEventsEntry* newTimestamps,
-        uint64_t frameNumber, FrameTimestamps* outTimestamps) {
+        FrameEventHistoryDelta* outDelta) {
     sp<ConsumerListener> listener(mConsumerListener.promote());
-    if (listener == nullptr) {
-        return false;
+    if (listener != nullptr) {
+        listener->addAndGetFrameTimestamps(newTimestamps, outDelta);
     }
-    return listener->addAndGetFrameTimestamps(
-            newTimestamps, frameNumber, outTimestamps);
 }
 
 void BufferQueue::createBufferQueue(sp<IGraphicBufferProducer>* outProducer,