New video filter : augmented reality. Add a moving ball to the video and...

New video filter : augmented reality. Add a moving ball to the video and handle bounces on the edges thanks to a Sobel gradient computation.
Signed-off-by: Antoine Cellerier <dionoea@videolan.org>

configure.ac

@@ -1200,6 +1200,7 @@ VLC_ADD_PLUGIN([wave])
 VLC_ADD_PLUGIN([ripple])
 VLC_ADD_PLUGIN([psychedelic])
 VLC_ADD_PLUGIN([gradient])
+VLC_ADD_PLUGIN([ball])
 VLC_ADD_PLUGIN([motionblur])
 VLC_ADD_PLUGIN([rv32])
 VLC_ADD_PLUGIN([rotate])

modules/video_filter/Modules.am

@@ -24,6 +24,7 @@ SOURCES_wave = wave.c
 SOURCES_ripple = ripple.c
 SOURCES_psychedelic = psychedelic.c
 SOURCES_gradient = gradient.c
+SOURCES_ball = ball.c
 SOURCES_panoramix = panoramix.c
 SOURCES_opencv_wrapper = opencv_wrapper.c
 SOURCES_opencv_example = opencv_example.cpp filter_event_info.h