Add inputEventId to SurfaceFrame

SurfaceFrame will now be aware of the id of the input event that caused
the current frame.

The flow of input event id is inputflinger -> app -> surfaceflinger.
Here, we are adding the 'inputEventId' parameter to the
'setFrameTimelineVsync' call. This call will now be responsible for
setting two pieces of information: the vsync id, and the input event id.
Since it will no longer be limited to the vsync id, we rename this call
to "setFrameTimelineInfo".

Once the inputEventId is stored in SurfaceFrame, we will add a binder
call to send the frame timing information to inputflinger (separate,
future CL). This will allow input to reconstruct the entire sequence of
events (at what time was input event getting processed in system_server,
app, and surfaceflinger) and will provide the ability to measure
end-to-end touch latency.

In a separate change, we will also add ATRACE calls to allow manual /
script-based latency analysis for local debugging. We will now know
which input event is being processed in surfaceflinger.

Bug: 169866723
Bug: 129481165
Design doc: https://docs.google.com/document/d/1G3bLaZYSmbe6AKcL-6ZChvrw_B_LXEz29Z6Ed9QoYXY/edit#
Test: atest WMShellUnitTests SurfaceParcelable_test libgui_test IPC_test SurfaceFlinger_test

Change-Id: If7e0eee82603b38b396b53ad7ced660973efcb50
Merged-In: If7e0eee82603b38b396b53ad7ced660973efcb50

1 files changed, 8 insertions, 8 deletions

diff --git a/libs/gui/Surface.cpp b/libs/gui/Surface.cpp
index e82f0cc9e9..59ad8d28bd 100644
--- a/libs/gui/Surface.cpp
+++ b/libs/gui/Surface.cpp
@@ -1496,8 +1496,8 @@ int Surface::perform(int operation, va_list args)
     case NATIVE_WINDOW_GET_LAST_QUEUED_BUFFER:
         res = dispatchGetLastQueuedBuffer(args);
         break;
-    case NATIVE_WINDOW_SET_FRAME_TIMELINE_VSYNC:
-        res = dispatchSetFrameTimelineVsync(args);
+    case NATIVE_WINDOW_SET_FRAME_TIMELINE_INFO:
+        res = dispatchSetFrameTimelineInfo(args);
         break;
     default:
         res = NAME_NOT_FOUND;
@@ -1806,12 +1806,13 @@ int Surface::dispatchGetLastQueuedBuffer(va_list args) {
     return result;
 }
 
-int Surface::dispatchSetFrameTimelineVsync(va_list args) {
+int Surface::dispatchSetFrameTimelineInfo(va_list args) {
     ATRACE_CALL();
     auto frameTimelineVsyncId = static_cast<int64_t>(va_arg(args, int64_t));
+    auto inputEventId = static_cast<int32_t>(va_arg(args, int32_t));
 
-    ALOGV("Surface::dispatchSetFrameTimelineVsync");
-    return setFrameTimelineVsync(frameTimelineVsyncId);
+    ALOGV("Surface::%s", __func__);
+    return setFrameTimelineInfo({frameTimelineVsyncId, inputEventId});
 }
 
 bool Surface::transformToDisplayInverse() {
@@ -2579,9 +2580,8 @@ status_t Surface::setFrameRate(float frameRate, int8_t compatibility, bool shoul
                                            shouldBeSeamless);
 }
 
-status_t Surface::setFrameTimelineVsync(int64_t frameTimelineVsyncId) {
-    return composerService()->setFrameTimelineVsync(mGraphicBufferProducer,
-        frameTimelineVsyncId);
+status_t Surface::setFrameTimelineInfo(const FrameTimelineInfo& frameTimelineInfo) {
+    return composerService()->setFrameTimelineInfo(mGraphicBufferProducer, frameTimelineInfo);
 }
 
 }; // namespace android