-Add an interface in playengine to set video sink using GstElement
This interface is for qmlglsink use or something like that.
-Optimize imxv4l2sink and overlaysink to make
them work with qmlglsrc more effective
Add RGBA format support the two sink.
Reduce the interval to 1ms when do dequeue retry in v4l2.
-Add gst_phy_mem_meta_init()
Avoid critical warning as gst_meta_register add critical check for NULL init_func.
-Aiurdemux add wma voice support
-Add vertical and horizontal flip support for overlaysink and imxv4l2sink
Add vertical and horizontal flip for overlaysink and imxv4l2sink.
Change playengine set rotate interface to set enum value.
Signed-off-by: Yuqing Zhu <carol.zhu@nxp.com> Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>