[PATCH 1/2] android/bluetooth: Add threashold to RSSI change
flat view
STALE4636d
From: Szymon Janc <hidden>
Date: 2014-01-28 23:47:14
Subsystem:
the rest · Maintainer:
Linus Torvalds
There is no need to report very small RSSI changes. --- android/bluetooth.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/android/bluetooth.c b/android/bluetooth.c
index b105ac8..b95023c 100644
--- a/android/bluetooth.c
+++ b/android/bluetooth.c@@ -1045,6 +1045,19 @@ static uint8_t bdaddr_type2android(uint8_t type) return HAL_TYPE_LE; } +static bool rssi_threashold(int old, int new) +{ + int delta; + + if (old > new) + delta = old - new; + else + delta = new - old; + + /* only 8 dBm or more */ + return delta >= 8; +} + static void update_found_device(const bdaddr_t *bdaddr, uint8_t bdaddr_type, int8_t rssi, bool confirm, const uint8_t *data, uint8_t data_len)
@@ -1113,7 +1126,7 @@ static void update_found_device(const bdaddr_t *bdaddr, uint8_t bdaddr_type, (*num_prop)++; } - if (rssi) { + if (rssi && rssi_threashold(dev->rssi, rssi)) { dev->rssi = rssi; size += fill_hal_prop(buf + size, HAL_PROP_DEVICE_RSSI,
--
1.8.5.3