diff options
Diffstat (limited to 'dvb-spec/dvbapi/intro.tex')
| -rw-r--r-- | dvb-spec/dvbapi/intro.tex | 19 |
1 files changed, 5 insertions, 14 deletions
diff --git a/dvb-spec/dvbapi/intro.tex b/dvb-spec/dvbapi/intro.tex index acb6b4b85..1d859fadb 100644 --- a/dvb-spec/dvbapi/intro.tex +++ b/dvb-spec/dvbapi/intro.tex @@ -68,7 +68,7 @@ time and re-inserted into the TS. The demultiplexer splits the TS into its components like audio and video streams. Besides usually several of such audio and video streams it also -contains data strams with information about the programs offered in this +contains data streams with information about the programs offered in this or other streams of the same provider. \item MPEG2 audio and video decoder @@ -110,8 +110,7 @@ The individual devices are called \begin{itemize} \item \texttt{/dev/ost/audio}, \item \texttt{/dev/ost/video}, -\item \texttt{/dev/ost/qpskfe}, -\item \texttt{/dev/ost/qamfe}, +\item \texttt{/dev/ost/frontend}, \item \texttt{/dev/ost/sec}, \item \texttt{/dev/ost/demux}, \item \texttt{/dev/ost/ca}, @@ -119,14 +118,6 @@ The individual devices are called but we will omit the ``\texttt{/dev/ost/}'' in the further dicussion of these devices. -%Thus, the \texttt{audio} and \texttt{video} devices directly control -%the MPEG2 decoder audio and video decoder, respectively. -%Depending on the kind of frontend present (satellite, cable or -%terrestrial), it will be controlled either through the -%\texttt{qpsk} or \texttt{qamfe} device. -%DiSEqC or other kinds of control signals can be sent to the -%antenna hardware through the \texttt{sec} device. - If more than one card is present in the system the other cards can be accessed through the corresponding devices with the card's number appended. \texttt{/dev/ost/demux0} (which @@ -151,7 +142,7 @@ with multiple DVB cards with more than one frontend or demultiplexer. Consider, e.g., two DVB cards, one with two frontends and one demultiplexer, the other with one frontend and two demultiplexers. If we just assign them consecutive numbers, there would be a demultiplexer -and a frontend which do notbelong to the same card but have +and a frontend which do not belong to the same card but have the same number. With \textsl{devfs} we propose a different scheme for the device names. @@ -169,14 +160,14 @@ two demultiplexers and an MPEG2 audio/video decoder is added, the complete \texttt{/dev/dvb} tree will look like this: \begin{verbatim} -/dev/dvb/card0/qam0 +/dev/dvb/card0/frontend0 demux0 /dev/dvb/card1/video0 audio0 demux0 demux1 - qpskfe0 + frontend0 sec0 \end{verbatim} |