118 строки
7.4 KiB
XML
118 строки
7.4 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % media-entities SYSTEM "./media-entities.tmpl"> %media-entities;
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<!ENTITY media-indices SYSTEM "./media-indices.tmpl">
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<!ENTITY eg "e. g.">
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<!ENTITY ie "i. e.">
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<!ENTITY fd "File descriptor returned by <link linkend='func-open'><function>open()</function></link>.">
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<!ENTITY fe_fd "File descriptor returned by <link linkend='frontend_f_open'><function>open()</function></link>.">
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<!ENTITY i2c "I<superscript>2</superscript>C">
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<!ENTITY return-value "<title>Return Value</title><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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<!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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<!ENTITY manvol "<manvolnum>2</manvolnum>">
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<!-- Table templates: structs, structs w/union, defines. -->
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<!ENTITY cs-str "<colspec colname='c1' colwidth='1*' /><colspec colname='c2' colwidth='1*' /><colspec colname='c3' colwidth='2*' /><spanspec spanname='hspan' namest='c1' nameend='c3' />">
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<!ENTITY cs-ustr "<colspec colname='c1' colwidth='1*' /><colspec colname='c2' colwidth='1*' /><colspec colname='c3' colwidth='1*' /><colspec colname='c4' colwidth='2*' /><spanspec spanname='hspan' namest='c1' nameend='c4' />">
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<!ENTITY cs-def "<colspec colname='c1' colwidth='3*' /><colspec colname='c2' colwidth='1*' /><colspec colname='c3' colwidth='4*' /><spanspec spanname='hspan' namest='c1' nameend='c3' />">
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<!-- Video for Linux mailing list address. -->
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<!ENTITY v4l-ml "<ulink url='http://www.linuxtv.org/lists.php'>http://www.linuxtv.org/lists.php</ulink>">
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<!-- LinuxTV v4l-dvb repository. -->
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<!ENTITY v4l-dvb "<ulink url='http://linuxtv.org/repo/'>http://linuxtv.org/repo/</ulink>">
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<!ENTITY dash-ent-8 "<entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry>">
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<!ENTITY dash-ent-10 "<entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry>">
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<!ENTITY dash-ent-12 "<entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry>">
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<!ENTITY dash-ent-14 "<entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry>">
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<!ENTITY dash-ent-16 "<entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry>">
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<!ENTITY dash-ent-20 "<entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry>">
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<!ENTITY dash-ent-22 "<entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry>">
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<!ENTITY dash-ent-24 "<entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry>">
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]>
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<book id="media_api" lang="en">
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<bookinfo>
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<title>LINUX MEDIA INFRASTRUCTURE API</title>
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<copyright>
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<year>2009-2014</year>
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<holder>LinuxTV Developers</holder>
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</copyright>
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<legalnotice>
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<para>Permission is granted to copy, distribute and/or modify
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this document under the terms of the GNU Free Documentation License,
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Version 1.1 or any later version published by the Free Software
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Foundation. A copy of the license is included in the chapter entitled
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"GNU Free Documentation License"</para>
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</legalnotice>
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</bookinfo>
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<toc></toc> <!-- autogenerated -->
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<preface>
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<title>Introduction</title>
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<para>This document covers the Linux Kernel to Userspace API's used by
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video and radio streaming devices, including video cameras,
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analog and digital TV receiver cards, AM/FM receiver cards,
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streaming capture and output devices, codec devices and remote
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controllers.</para>
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<para>A typical media device hardware is shown at
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<xref linkend="typical_media_device" />.</para>
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<figure id="typical_media_device">
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<title>Typical Media Device</title>
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<mediaobject>
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<imageobject>
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<imagedata fileref="typical_media_device.svg" format="SVG" />
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</imageobject>
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<textobject>
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<phrase>Typical Media Device Block Diagram</phrase>
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</textobject>
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</mediaobject>
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</figure>
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<para>The media infrastructure API was designed to control such
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devices. It is divided into four parts.</para>
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<para>The first part covers radio, video capture and output,
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cameras, analog TV devices and codecs.</para>
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<para>The second part covers the
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API used for digital TV and Internet reception via one of the
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several digital tv standards. While it is called as DVB API,
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in fact it covers several different video standards including
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DVB-T/T2, DVB-S/S2, DVB-C, ATSC, ISDB-T, ISDB-S,etc. The complete
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list of supported standards can be found at
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<xref linkend="fe-delivery-system-t" />.</para>
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<para>The third part covers the Remote Controller API.</para>
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<para>The fourth part covers the Media Controller API.</para>
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<para>It should also be noted that a media device may also have audio
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components, like mixers, PCM capture, PCM playback, etc, which
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are controlled via ALSA API.</para>
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<para>For additional information and for the latest development code,
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see: <ulink url="http://linuxtv.org">http://linuxtv.org</ulink>.</para>
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<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>
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</preface>
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<part id="v4l2spec">
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&sub-v4l2;
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</part>
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<part id="dvbapi">
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&sub-dvbapi;
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</part>
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<part id="remotes">
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&sub-remote_controllers;
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</part>
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<part id="media_common">
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&sub-media-controller;
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</part>
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<chapter id="gen_errors">
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&sub-gen-errors;
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</chapter>
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&sub-fdl-appendix;
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</book>
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