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</td><td valign="top" width="500"><font color="#ffcc00" face="arial, helvetica"><h2>Linux DVB API</h2></font>
<p>
Part of the DVB API builds upon the
<a href="http://roadrunner.swansea.uk.linux.org/v4l.shtml">Video4Linux</a>
(V4L) API.
The Siemens DVB card uses the SAA7146 as PCI bridge. A <a href="http://www.mihu.de/">generic SAA7146 Linux driver</a> for this
chip implements the basic V4L interface.
</p>
<p>
An older version of the API included the DVB specific calls
into the V4L interface. This turned out to be very cumbersome to
program. Since we also hoped to arrive at a common standard for all
Linux platforms, especially those in embedded consumer devices, we
were happy to find
<a href="http://www.nokia.com/multimedia">Nokia</a>
as a partner in this effort.
They will be using the same API in their upcoming
<a href="http://www.nokia.com/multimedia/mediaterminal.html">
Media Terminal</a>.
</p>
<p>
In the new version of the API only display and grabbing of the
already decompressed images is handled through the V4L device.
All other DVB features like tuning, filtering and playback/recording
of the compressed data stream are accessed through separate devices.
</p>
<p>
<font face="arial, helvetica" size="+1">DVB devices</font>
<p>
There are currently 5 DVB devices: Video, Audio, Frontend, SEC and Demux.
The APIs of those devices are described in the documents below.
They contain links to the include files and to detailed descriptions
of all commands (the latter are still under construction).
</p>
<p>
<a href="dvb_api/video.xml">DVB Video API</a>
</p>
<p>
<a href="dvb_api/audio.xml">DVB Audio API</a>
</p>
<p>
<a href="dvb_api/frontend.xml">DVB Frontend API</a>
</p>
<p>
<a href="dvb_api/sec.xml">DVB SEC API</a>
</p>
<p>
<a href="dvb_api/demux.xml">DVB Demux API</a>
</p>
</p>
<p>
<font face="arial, helvetica" size="+1">DVB Demux Kernel Module</font>
<p>
The demux device accesses the actual demux hardware through a
demux kernel module.
This way other kernel modules (e.g. a generic DVB network device)
and not only the demux device can access the demux hardware.
</p>
<p>
<a href="dvb_api/demux_mod.xml">DVB Demux Kernel Module API</a>
</p>
</p>
<p>
First implementations of the API for the Siemens DVB card will be made
available in the download section during September 2000.
</p>
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