Create a GstMemory object that is mapped with flags. If mem is mappable
with flags, this function returns the mapped mem directly. Otherwise a
mapped copy of mem is returned.
This function takes ownership of old mem and returns a reference to a new
GstMemory.
Create a GstMemory object that is mapped with flags. If mem is mappable with flags, this function returns the mapped mem directly. Otherwise a mapped copy of mem is returned. This function takes ownership of old mem and returns a reference to a new GstMemory.