\section{Introduction}\label{index_intro}
This is the documentation for {\tt libtheora} C API. The current reference implementation for {\tt Theora}, a free, patent-unencumbered video codec. Theora is derived from On2's VP3 codec with additional features and integration for Ogg multimedia formats by {\tt the Xiph.Org Foundation}. Complete documentation of the format itself is available in {\tt the Theora specification}.\subsection{Organization}\label{index_Organization}
The functions documented here are actually subdivided into two separate libraries:\begin{itemize}
\item {\tt libtheoradec}, contains the decoder and shared routines. You must link to this if you use any of the functions listed in this API, i.e., those listed in \doxyref{Functions Shared by Encode and Decode}{p.}{group__basefuncs} and \doxyref{Functions for Decoding}{p.}{group__decfuncs}. \end{itemize}
