Sync MT slots on reset and buffer overflow
At present we don't repopulate the MT slot values when a buffer overflow
occurs. This may lead to incosistent event being generate due to out of
sync Mt Slot values.
In this change we repopulate the MT slot values with EVIOCGMTSLOTS
system call after resetting the mapper. Now in case of a buffer overflow
a ongoing multitouch gesture will be cancelled and restarted.
Test: atest inputflinger_tests
Bug: b/291626046
Change-Id: I8195406ce1f9e3e704381b47e282c65463537745
diff --git a/services/inputflinger/reader/include/EventHub.h b/services/inputflinger/reader/include/EventHub.h
index 0bcab42..a7e0675 100644
--- a/services/inputflinger/reader/include/EventHub.h
+++ b/services/inputflinger/reader/include/EventHub.h
@@ -336,6 +336,10 @@
virtual int32_t getSwitchState(int32_t deviceId, int32_t sw) const = 0;
virtual status_t getAbsoluteAxisValue(int32_t deviceId, int32_t axis,
int32_t* outValue) const = 0;
+ /* Query Multi-Touch slot values for an axis. Returns error or an 1 indexed array of size
+ * (slotCount + 1). The value at the 0 index is set to queried axis. */
+ virtual base::Result<std::vector<int32_t>> getMtSlotValues(int32_t deviceId, int32_t axis,
+ size_t slotCount) const = 0;
virtual int32_t getKeyCodeForKeyLocation(int32_t deviceId, int32_t locationKeyCode) const = 0;
/*
@@ -552,6 +556,8 @@
int32_t locationKeyCode) const override final;
status_t getAbsoluteAxisValue(int32_t deviceId, int32_t axis,
int32_t* outValue) const override final;
+ base::Result<std::vector<int32_t>> getMtSlotValues(int32_t deviceId, int32_t axis,
+ size_t slotCount) const override final;
bool markSupportedKeyCodes(int32_t deviceId, const std::vector<int32_t>& keyCodes,
uint8_t* outFlags) const override final;