step1: PowerProfile.POWER_WIFI_ACTIVE represents energy consumption(mAh) per hour
devied by 3600, then WIFI_POWER ==> energy consumption(mAh) per second
step2: WIFI_BPS represents 1000000 bit per second
then (double)WIFI_BPS) / 8 ==> 1000000/8 Byte per second
step3: as upload and download, so divided by 2;
then (((double)WIFI_BPS) / 8 / 2048)) ==> 1000000/8/2048 KB per second
==> packet per second (where 1 packet = 2 KB)
so WIFI_POWER / (((double)WIFI_BPS) / 8 / 2048) represents mAh per Packet where 1 packet = 2 K.
when divided by (60*60) again , that make WifiPowerEstimator narrow 3600 times.
Change-Id: Ic055a5145b6dfb1129c8969826329a3024c9e2b6
Signed-off-by: yuanhuihui <yuanhuihui@xiaomi.com>
9d8f51cbae