To reduce the bytes need to be buffered before start playing the streaming video.

namespace android {

static int64_t kLowWaterMarkUs = 2000000ll;  // 2secs

static int64_t kHighWaterMarkUs = 10000000ll;  // 10secs

static int64_t kHighWaterMarkUs = 5000000ll;  // 5secs

static int64_t kHighWaterMarkRTSPUs = 4000000ll;  // 4secs

static const size_t kLowWaterMarkBytes = 40000;

static const size_t kHighWaterMarkBytes = 200000;