InputTracer: Add tests for perfetto backend

Add a new InputTraceSession class that encapsulates the logic to take
and decode a perfetto input trace for testing.

Then, use it to add new tests to verify the behavior of entire tracing
framework, using InputDispatcher as the interface.

Bug: 210460522
Test: atest inputflinger_tests
Change-Id: I5a9b47e831c5c30e5d7f2b60c9b8075b7d330e9e

1 files changed, 30 insertions, 0 deletions

diff --git a/services/inputflinger/InputCommonConverter.cpp b/services/inputflinger/InputCommonConverter.cpp
index 6ccd9e7697..417c1f333b 100644
--- a/services/inputflinger/InputCommonConverter.cpp
+++ b/services/inputflinger/InputCommonConverter.cpp
@@ -20,6 +20,9 @@ using namespace ::aidl::android::hardware::input;
 
 namespace android {
 
+const static ui::Transform kIdentityTransform;
+const static std::array<uint8_t, 32> kInvalidHmac{};
+
 static common::Source getSource(uint32_t source) {
     static_assert(static_cast<common::Source>(AINPUT_SOURCE_UNKNOWN) == common::Source::UNKNOWN,
                   "SOURCE_UNKNOWN mismatch");
@@ -337,4 +340,31 @@ common::MotionEvent notifyMotionArgsToHalMotionEvent(const NotifyMotionArgs& arg
     return event;
 }
 
+MotionEvent toMotionEvent(const NotifyMotionArgs& args, const ui::Transform* transform,
+                          const ui::Transform* rawTransform, const std::array<uint8_t, 32>* hmac) {
+    if (transform == nullptr) transform = &kIdentityTransform;
+    if (rawTransform == nullptr) rawTransform = &kIdentityTransform;
+    if (hmac == nullptr) hmac = &kInvalidHmac;
+
+    MotionEvent event;
+    event.initialize(args.id, args.deviceId, args.source, args.displayId, *hmac, args.action,
+                     args.actionButton, args.flags, args.edgeFlags, args.metaState,
+                     args.buttonState, args.classification, *transform, args.xPrecision,
+                     args.yPrecision, args.xCursorPosition, args.yCursorPosition, *rawTransform,
+                     args.downTime, args.eventTime, args.getPointerCount(),
+                     args.pointerProperties.data(), args.pointerCoords.data());
+    return event;
+}
+
+KeyEvent toKeyEvent(const NotifyKeyArgs& args, int32_t repeatCount,
+                    const std::array<uint8_t, 32>* hmac) {
+    if (hmac == nullptr) hmac = &kInvalidHmac;
+
+    KeyEvent event;
+    event.initialize(args.id, args.deviceId, args.source, args.displayId, *hmac, args.action,
+                     args.flags, args.keyCode, args.scanCode, args.metaState, repeatCount,
+                     args.downTime, args.eventTime);
+    return event;
+}
+
 } // namespace android