public final PlayerDoubleTapListener getControls() {
            return controls;
        }
Gesture Listener for double tapping

For more information which methods are called in certain situations look for
[GestureDetector.onTouchEvent][android.view.GestureDetector.onTouchEvent],
especially for ACTION_DOWN and ACTION_UP
app/src/main/java/com/brouken/player/dtpv/DoubleTapPlayerView.java