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<!ENTITY return-value-dvb "<para>RETURN VALUE</para><para>On success <returnvalue>0</returnvalue> is returned, on error <returnvalue>-1</returnvalue> and the <varname>errno</varname> variable is set appropriately. The generic error codes are described at the <link linkend='gen-errors'>Generic Error Codes</link> chapter.</para>">
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<!-- Video for Linux mailing list address. -->
<!ENTITY v4l-ml "<ulink url='https://linuxtv.org/lists.php'>https://linuxtv.org/lists.php</ulink>">
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<book id="media_api" lang="en">
<bookinfo>
<title>LINUX MEDIA INFRASTRUCTURE API</title>
<copyright>
<year>2009-2015</year>
<holder>LinuxTV Developers</holder>
</copyright>
<legalnotice>
<para>Permission is granted to copy, distribute and/or modify
this document under the terms of the GNU Free Documentation License,
Version 1.1 or any later version published by the Free Software
Foundation. A copy of the license is included in the chapter entitled
"GNU Free Documentation License"</para>
</legalnotice>
</bookinfo>
<toc></toc> <!-- autogenerated -->
<preface>
<title>Introduction</title>
<para>This document covers the Linux Kernel to Userspace API's used by
video and radio streaming devices, including video cameras,
analog and digital TV receiver cards, AM/FM receiver cards,
streaming capture and output devices, codec devices and remote
controllers.</para>
<para>A typical media device hardware is shown at
<xref linkend="typical_media_device" />.</para>
<figure id="typical_media_device">
<title>Typical Media Device</title>
<mediaobject>
<imageobject>
<imagedata fileref="typical_media_device.svg" format="SVG" />
</imageobject>
<textobject>
<phrase>Typical Media Device Block Diagram</phrase>
</textobject>
</mediaobject>
</figure>
<para>The media infrastructure API was designed to control such
devices. It is divided into five parts.</para>
<para>The first part covers radio, video capture and output,
cameras, analog TV devices and codecs.</para>
<para>The second part covers the
API used for digital TV and Internet reception via one of the
several digital tv standards. While it is called as DVB API,
in fact it covers several different video standards including
DVB-T/T2, DVB-S/S2, DVB-C, ATSC, ISDB-T, ISDB-S,etc. The complete
list of supported standards can be found at
<xref linkend="fe-delivery-system-t" />.</para>
<para>The third part covers the Remote Controller API.</para>
<para>The fourth part covers the Media Controller API.</para>
<para>The fifth part covers the CEC (Consumer Electronics Control) API.</para>
<para>It should also be noted that a media device may also have audio
components, like mixers, PCM capture, PCM playback, etc, which
are controlled via ALSA API.</para>
<para>For additional information and for the latest development code,
see: <ulink url="https://linuxtv.org">https://linuxtv.org</ulink>.</para>
<para>For discussing improvements, reporting troubles, sending new drivers, etc, please mail to: <ulink url="http://vger.kernel.org/vger-lists.html#linux-media">Linux Media Mailing List (LMML).</ulink>.</para>
</preface>
<part id="v4l2spec">
&sub-v4l2;
</part>
<part id="dvbapi">
&sub-dvbapi;
</part>
<part id="remotes">
&sub-remote_controllers;
</part>
<part id="media_common">
&sub-media-controller;
</part>
<part id="cec">
&sub-cec-api;
</part>
<chapter id="gen_errors">
&sub-gen-errors;
</chapter>
&sub-fdl-appendix;
</book>
|
