View source for Hacker Guide/Access

== Usage  ==

As the name suggests, these modules are designed to be the first and last elements of a modules chain. Access [[Documentation:Hacker's Guide/Access|input]]  and [[Documentation:Hacker's Guide/Access output|output]]  handles most of the basic I/O for VLC. Protocol implementations, device access (like V4L2), file access and network I/O are all examples of access modules. 

== Functionality  ==

Generally speaking, [[Documentation:Hacker's Guide/Access|access input]] will provide Read() functions and [[Documentation:Hacker's Guide/Access output|output]] Write(). Both needs to provide Seek() and Control() even if the underlying architecture does not support these actions. In this case, Seek() and Control() should return VLC_EGENERIC, although Control() might need to answer ACCESS_OUT_CONTROLS_PACE requests. See modules/access_output/http.c about using a source without seeking.