About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Documentation / DocBook / media_api.tmpl




Custom Search

Based on kernel version 4.7.2. Page generated on 2016-08-22 22:44 EST.

1	<?xml version="1.0" encoding="UTF-8"?>
2	<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3		"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4	<!ENTITY % media-entities SYSTEM "./media-entities.tmpl"> %media-entities;
5	<!ENTITY media-indices SYSTEM "./media-indices.tmpl">
6	
7	<!ENTITY eg                     "e.&nbsp;g.">
8	<!ENTITY ie                     "i.&nbsp;e.">
9	<!ENTITY fd                     "File descriptor returned by <link linkend='func-open'><function>open()</function></link>.">
10	<!ENTITY fe_fd                  "File descriptor returned by <link linkend='frontend_f_open'><function>open()</function></link>.">
11	<!ENTITY i2c                    "I<superscript>2</superscript>C">
12	<!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>">
13	<!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>">
14	<!ENTITY manvol                 "<manvolnum>2</manvolnum>">
15	
16	<!-- Table templates: structs, structs w/union, defines. -->
17	<!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' />">
18	<!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' />">
19	<!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' />">
20	
21	<!-- Video for Linux mailing list address. -->
22	<!ENTITY v4l-ml                 "<ulink url='https://linuxtv.org/lists.php'>https://linuxtv.org/lists.php</ulink>">
23	
24	<!-- LinuxTV v4l-dvb repository. -->
25	<!ENTITY v4l-dvb		"<ulink url='https://linuxtv.org/repo/'>https://linuxtv.org/repo/</ulink>">
26	<!ENTITY dash-ent-8             "<entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry>">
27	<!ENTITY dash-ent-10            "<entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry><entry>-</entry>">
28	<!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>">
29	<!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>">
30	<!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>">
31	<!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>">
32	<!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>">
33	<!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>">
34	]>
35	
36	<book id="media_api" lang="en">
37	<bookinfo>
38		<title>LINUX MEDIA INFRASTRUCTURE API</title>
39	
40		<copyright>
41			<year>2009-2015</year>
42			<holder>LinuxTV Developers</holder>
43		</copyright>
44	
45		<legalnotice>
46			<para>Permission is granted to copy, distribute and/or modify
47			this document under the terms of the GNU Free Documentation License,
48			Version 1.1 or any later version published by the Free Software
49			Foundation. A copy of the license is included in the chapter entitled
50			"GNU Free Documentation License"</para>
51		</legalnotice>
52	</bookinfo>
53	
54	<toc></toc> <!-- autogenerated -->
55	
56	<preface>
57		<title>Introduction</title>
58	
59		<para>This document covers the Linux Kernel to Userspace API's used by
60			video and radio streaming devices, including video cameras,
61			analog and digital TV receiver cards, AM/FM receiver cards,
62			streaming capture and output devices, codec devices and remote
63			controllers.</para>
64		<para>A typical media device hardware is shown at
65		<xref linkend="typical_media_device" />.</para>
66		<figure id="typical_media_device">
67		    <title>Typical Media Device</title>
68		    <mediaobject>
69			<imageobject>
70			    <imagedata fileref="typical_media_device.svg" format="SVG" />
71			</imageobject>
72			<textobject>
73			    <phrase>Typical Media Device Block Diagram</phrase>
74			</textobject>
75		    </mediaobject>
76		</figure>
77		<para>The media infrastructure API was designed to control such
78		    devices. It is divided into four parts.</para>
79		<para>The first part covers radio, video capture and output,
80			cameras, analog TV devices and codecs.</para>
81		<para>The second part covers the
82			API used for digital TV and Internet reception via one of the
83			several digital tv standards. While it is called as DVB API,
84			in fact it covers several different video standards including
85			DVB-T/T2, DVB-S/S2, DVB-C, ATSC, ISDB-T, ISDB-S,etc. The complete
86			list of supported standards can be found at
87			<xref linkend="fe-delivery-system-t" />.</para>
88		<para>The third part covers the Remote Controller API.</para>
89		<para>The fourth part covers the Media Controller API.</para>
90		<para>It should also be noted that a media device may also have audio
91		      components, like mixers, PCM capture, PCM playback, etc, which
92		      are controlled via ALSA API.</para>
93		<para>For additional information and for the latest development code,
94			see: <ulink url="https://linuxtv.org">https://linuxtv.org</ulink>.</para>
95		<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>
96	</preface>
97	
98	<part id="v4l2spec">
99	&sub-v4l2;
100	</part>
101	<part id="dvbapi">
102	&sub-dvbapi;
103	</part>
104	<part id="remotes">
105	&sub-remote_controllers;
106	</part>
107	<part id="media_common">
108	&sub-media-controller;
109	</part>
110	
111	<chapter id="gen_errors">
112	&sub-gen-errors;
113	</chapter>
114	
115	&sub-fdl-appendix;
116	
117	</book>
Hide Line Numbers
About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Information is copyright its respective author. All material is available from the Linux Kernel Source distributed under a GPL License. This page is provided as a free service by mjmwired.net.