libcamera: clock_recovery: Use nanoseconds in addSample()

FrameWallClock was recently changed to nanoseconds, and all users of
ClockRecovery use SensorTimestamp directly, which is also in
nanoseconds. Thus addSample() should also use nanoseconds. Fix this.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
Tested-by: Naushir Patuck <naush@raspberrypi.com>

Author: Rahi374

src/libcamera/clock_recovery.cpp

@@ -118,10 +118,10 @@ void ClockRecovery::addSample()
 	clock_gettime(CLOCK_BOOTTIME, &bootTime1);
 	clock_gettime(CLOCK_REALTIME, &wallTime);
 	clock_gettime(CLOCK_BOOTTIME, &bootTime2);
-	uint64_t boot1 = bootTime1.tv_sec * 1000000ULL + bootTime1.tv_nsec / 1000;
-	uint64_t boot2 = bootTime2.tv_sec * 1000000ULL + bootTime2.tv_nsec / 1000;
+	uint64_t boot1 = bootTime1.tv_sec * 1000000000ULL + bootTime1.tv_nsec;
+	uint64_t boot2 = bootTime2.tv_sec * 1000000000ULL + bootTime2.tv_nsec;
 	uint64_t boot = (boot1 + boot2) / 2;
-	uint64_t wall = wallTime.tv_sec * 1000000ULL + wallTime.tv_nsec / 1000;
+	uint64_t wall = wallTime.tv_sec * 1000000000ULL + wallTime.tv_nsec;
 
 	addSample(boot, wall);
 }