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diff --git a/appendix.tex b/appendix.tex new file mode 100644 index 0000000..e366e7f --- /dev/null +++ b/appendix.tex @@ -0,0 +1,37 @@ + +\section{CRC-DABMUX ETI file formats} +\label{etiformat} +CRC-DABMUX supports three output formats for the ETI stream, that have been described on the mmbTools forum +website.\footnote{\url{http://mmbtools.crc.ca/component/option,com\_fireboard/Itemid,55/func,view/id,4/catid,13/\#28}} + +The three formats are called \emph{framed}, \emph{streamed} and \emph{raw}. + +The \emph{framed} format is used for saving a finite ETI stream into a file. Each frame does not contain any padding, and the +format can be described as follows: +\begin{lstlisting} +uint32_t nbFrames +// for each frame + uint16_t frameSize + uint8_t data[frameSize] +\end{lstlisting} + +When streaming data, in which case the number of frames is not known in advance, the \emph{streamed} format can be used. +This format is identical to the first one except for the missing \texttt{nbFrames}. +\begin{lstlisting} +// for each frame + uint16_t frameSize + uint8_t data[frameSize] +\end{lstlisting} + +The \emph{raw} format corresponds to ETI(NI), where each frame has a constant size of 6144 Bytes. The padding in this +case is necessary. +\begin{lstlisting} +// for each frame + uint8_t data[6144] +\end{lstlisting} + +In order to select the format, the following syntax for the \texttt{-O} option is used: +\texttt{-O file://filename?type=format}, where \texttt{format} is one of \verb+framed+, \verb+streamed+ or +\verb+raw+. + + |