Return a shared copy of @size bytes from @mem starting from @offset. No memory copy is performed and the memory region is simply shared. The result is guaranteed to be not-writable. @size can be set to -1 to return a share all bytes from @offset.
an offset to share
size to share or -1 to share bytes from offset
Return: a new #GstMemory.
See Implementation
Return a shared copy of @size bytes from @mem starting from @offset. No memory copy is performed and the memory region is simply shared. The result is guaranteed to be not-writable. @size can be set to -1 to return a share all bytes from @offset.