Get the memory of mem that can be accessed according to the mode specified in info's flags. The function should return a pointer that contains at least maxsize bytes.
mem
info'
maxsize
a #GstMemory
the #GstMapInfo to map with
size to map
Get the memory of
memthat can be accessed according to the mode specified ininfo's flags. The function should return a pointer that contains at leastmaxsizebytes.