<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <HTML ><HEAD ><TITLE >video_register_device</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="Video4Linux Programming" HREF="book1.html"><LINK REL="UP" TITLE="Public Functions Provided" HREF="c498.html"><LINK REL="PREVIOUS" TITLE="Public Functions Provided" HREF="c498.html"><LINK REL="NEXT" TITLE="video_unregister_device" HREF="r551.html"></HEAD ><BODY CLASS="REFENTRY" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >Video4Linux Programming</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="c498.html" ACCESSKEY="P" ><<< Previous</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="r551.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="AEN500" ></A ><SPAN CLASS="phrase" ><SPAN CLASS="PHRASE" >video_register_device</SPAN ></SPAN ></H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN504" ></A ><H2 >Name</H2 >video_register_device -- register video4linux devices </DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN507" ></A ><H2 >Synopsis</H2 ><DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN509" ></A ><P ></P ><P ><CODE ><CODE CLASS="FUNCDEF" >int <TT CLASS="FUNCTION" >video_register_device </TT ></CODE >(struct video_device * <TT CLASS="PARAMETER" ><I >vfd</I ></TT >, int <TT CLASS="PARAMETER" ><I >type</I ></TT >, int <TT CLASS="PARAMETER" ><I >nr</I ></TT >);</CODE ></P ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN519" ></A ><H2 >Arguments</H2 ><P ></P ><DIV CLASS="VARIABLELIST" ><DL ><DT ><TT CLASS="PARAMETER" ><I >vfd</I ></TT ></DT ><DD ><P > video device structure we want to register </P ></DD ><DT ><TT CLASS="PARAMETER" ><I >type</I ></TT ></DT ><DD ><P > type of device to register </P ></DD ><DT ><TT CLASS="PARAMETER" ><I >nr</I ></TT ></DT ><DD ><P > which device number (0 == /dev/video0, 1 == /dev/video1, ... -1 == first free) </P ></DD ></DL ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN537" ></A ><H2 >Description</H2 ><P > The registration code assigns minor numbers based on the type requested. -ENFILE is returned in all the device slots for this category are full. If not then the minor field is set and the driver initialize function is called (if non <TT CLASS="CONSTANT" >NULL</TT >). </P ><P > Zero is returned on success. </P ><P > Valid types are </P ><P > <TT CLASS="CONSTANT" >VFL_TYPE_GRABBER</TT > - A frame grabber </P ><P > <TT CLASS="CONSTANT" >VFL_TYPE_VTX</TT > - A teletext device </P ><P > <TT CLASS="CONSTANT" >VFL_TYPE_VBI</TT > - Vertical blank data (undecoded) </P ><P > <TT CLASS="CONSTANT" >VFL_TYPE_RADIO</TT > - A radio card </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="c498.html" ACCESSKEY="P" ><<< Previous</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="book1.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="r551.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Public Functions Provided</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="c498.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><SPAN CLASS="phrase" ><SPAN CLASS="PHRASE" >video_unregister_device</SPAN ></SPAN ></TD ></TR ></TABLE ></DIV ></BODY ></HTML >