Added error band comparison to velocity matching

USG_1.0
Robert Fisk 7 years ago
parent f7b7ce84e7
commit 2deea5a646

@ -47,6 +47,8 @@
//-----------------------------------------------------------
#define MOUSE_BOTDETECT_VELOCITY_HISTORY_SIZE 12
#define MOUSE_BOTDETECT_VELOCITY_MATCH_BASE 256
#define MOUSE_BOTDETECT_VELOCITY_MATCH_ERROR 6
#define MOUSE_BOTDETECT_MOVE_DELAY_LIMIT 5
#endif

@ -384,6 +384,7 @@ void Upstream_HID_BotDetectMouse(uint8_t* mouseInData)
uint32_t moveDelay;
uint32_t velocity;
uint32_t newAverageVelocity;
uint32_t newAverageVelocityMatchError;
uint32_t oldAverageVelocity;
int8_t mouseX;
int8_t mouseY;
@ -391,7 +392,7 @@ void Upstream_HID_BotDetectMouse(uint8_t* mouseInData)
mouseX = mouseInData[1];
mouseY = mouseInData[2];
velocity = (sqrtf(((int32_t)mouseX * mouseX) +
((int32_t)mouseY * mouseY))) * 8; //Multiply floating-point sqrt result to avoid integer rounding
((int32_t)mouseY * mouseY))) * 10; //Multiply floating-point sqrt result to avoid integer rounding errors
moveDelay = ((now - LastMouseMoveTime) + (HID_FS_BINTERVAL / 2)) / HID_FS_BINTERVAL; //Number of poll intervals since last movement
if (moveDelay > MOUSE_BOTDETECT_MOVE_DELAY_LIMIT) moveDelay = MOUSE_BOTDETECT_MOVE_DELAY_LIMIT;
@ -425,7 +426,10 @@ void Upstream_HID_BotDetectMouse(uint8_t* mouseInData)
velocity += MouseVelocityHistory[i].velocity;
}
oldAverageVelocity = (velocity * 8) / moveDelay; //Multiply velocity up to avoid rounding errors on divide
if (newAverageVelocity == oldAverageVelocity)
newAverageVelocityMatchError = (newAverageVelocity * MOUSE_BOTDETECT_VELOCITY_MATCH_ERROR) / MOUSE_BOTDETECT_VELOCITY_MATCH_BASE;
if (((newAverageVelocity + newAverageVelocityMatchError) >= oldAverageVelocity) &&
((newAverageVelocity - newAverageVelocityMatchError) <= oldAverageVelocity))
{
SameVelocityCounter++;
if (SameVelocityCounter > MOUSE_BOTDETECT_TEMPORARY_LOCKOUT_VELOCITY_THRESHOLD)

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