Documentation/DocBook/v4l/v4l2.xml - kernel/msm-4.9 - Gitiles

  <partinfo>
     <authorgroup>
       <author>
 	<firstname>Michael</firstname>
 	<surname>Schimek</surname>
 	<othername role="mi">H</othername>
 	<affiliation>
 	  <address>
 	    <email>mschimek@gmx.at</email>
 	  </address>
 	</affiliation>
       </author>

       <author>
 	<firstname>Bill</firstname>
 	<surname>Dirks</surname>
 	<!-- Commented until Bill opts in to be spammed.
 	<affiliation>
 	  <address>
 	    <email>bill@thedirks.org</email>
 	  </address>
 	</affiliation> -->
 	<contrib>Original author of the V4L2 API and
 documentation.</contrib>
       </author>

       <author>
 	<firstname>Hans</firstname>
 	<surname>Verkuil</surname>
 	<contrib>Designed and documented the VIDIOC_LOG_STATUS ioctl,
 the extended control ioctls and major parts of the sliced VBI
 API.</contrib>
 	<affiliation>
 	  <address>
 	    <email>hverkuil@xs4all.nl</email>
 	  </address>
 	</affiliation>
       </author>

       <author>
 	<firstname>Martin</firstname>
 	<surname>Rubli</surname>
 	<!--
 	<affiliation>
 	  <address>
 	    <email>martin_rubli@logitech.com</email>
 	  </address>
 	</affiliation> -->
 	<contrib>Designed and documented the VIDIOC_ENUM_FRAMESIZES
 and VIDIOC_ENUM_FRAMEINTERVALS ioctls.</contrib>
       </author>

       <author>
 	<firstname>Andy</firstname>
 	<surname>Walls</surname>
 	<contrib>Documented the fielded V4L2_MPEG_STREAM_VBI_FMT_IVTV
 MPEG stream embedded, sliced VBI data format in this specification.
 </contrib>
 	<affiliation>
 	  <address>
 	    <email>awalls@md.metrocast.net</email>
 	  </address>
 	</affiliation>
       </author>

       <author>
 	<firstname>Mauro</firstname>
 	<surname>Carvalho Chehab</surname>
 	<contrib>Documented libv4l, designed and added v4l2grab example,
 Remote Controller chapter.</contrib>
 	<affiliation>
 	  <address>
 	    <email>mchehab@redhat.com</email>
 	  </address>
 	</affiliation>
       </author>

       <author>
 	<firstname>Muralidharan</firstname>
 	<surname>Karicheri</surname>
 	<contrib>Documented the Digital Video timings API.</contrib>
 	<affiliation>
 	  <address>
 	    <email>m-karicheri2@ti.com</email>
 	  </address>
 	</affiliation>
       </author>
     </authorgroup>

     <copyright>
       <year>1999</year>
       <year>2000</year>
       <year>2001</year>
       <year>2002</year>
       <year>2003</year>
       <year>2004</year>
       <year>2005</year>
       <year>2006</year>
       <year>2007</year>
       <year>2008</year>
       <year>2009</year>
       <year>2010</year>
       <year>2011</year>
       <holder>Bill Dirks, Michael H. Schimek, Hans Verkuil, Martin
 Rubli, Andy Walls, Muralidharan Karicheri, Mauro Carvalho Chehab</holder>
     </copyright>
     <legalnotice>
     <para>Except when explicitly stated as GPL, programming examples within
 	    this part can be used and distributed without restrictions.</para>
     </legalnotice>
     <revhistory>
       <!-- Put document revisions here, newest first. -->
       <!-- API revisions (changes and additions of defines, enums,
 structs, ioctls) must be noted in more detail in the history chapter
 (compat.xml), along with the possible impact on existing drivers and
 applications. -->

       <revision>
 	<revnumber>2.6.37</revnumber>
 	<date>2010-08-06</date>
 	<authorinitials>hv</authorinitials>
 	<revremark>Removed obsolete vtx (videotext) API.</revremark>
       </revision>

       <revision>
 	<revnumber>2.6.33</revnumber>
 	<date>2009-12-03</date>
 	<authorinitials>mk</authorinitials>
 	<revremark>Added documentation for the Digital Video timings API.</revremark>
       </revision>

       <revision>
 	<revnumber>2.6.32</revnumber>
 	<date>2009-08-31</date>
 	<authorinitials>mcc</authorinitials>
 	<revremark>Now, revisions will match the kernel version where
 the V4L2 API changes will be used by the Linux Kernel.
 Also added Remote Controller chapter.</revremark>
       </revision>

       <revision>
 	<revnumber>0.29</revnumber>
 	<date>2009-08-26</date>
 	<authorinitials>ev</authorinitials>
 	<revremark>Added documentation for string controls and for FM Transmitter controls.</revremark>
       </revision>

       <revision>
 	<revnumber>0.28</revnumber>
 	<date>2009-08-26</date>
 	<authorinitials>gl</authorinitials>
 	<revremark>Added V4L2_CID_BAND_STOP_FILTER documentation.</revremark>
       </revision>

       <revision>
 	<revnumber>0.27</revnumber>
 	<date>2009-08-15</date>
 	<authorinitials>mcc</authorinitials>
 	<revremark>Added libv4l and Remote Controller documentation;
 added v4l2grab and keytable application examples.</revremark>
       </revision>

       <revision>
 	<revnumber>0.26</revnumber>
 	<date>2009-07-23</date>
 	<authorinitials>hv</authorinitials>
 	<revremark>Finalized the RDS capture API. Added modulator and RDS encoder
 capabilities. Added support for string controls.</revremark>
       </revision>

       <revision>
 	<revnumber>0.25</revnumber>
 	<date>2009-01-18</date>
 	<authorinitials>hv</authorinitials>
 	<revremark>Added pixel formats VYUY, NV16 and NV61, and changed
 the debug ioctls VIDIOC_DBG_G/S_REGISTER and VIDIOC_DBG_G_CHIP_IDENT.
 Added camera controls V4L2_CID_ZOOM_ABSOLUTE, V4L2_CID_ZOOM_RELATIVE,
 V4L2_CID_ZOOM_CONTINUOUS and V4L2_CID_PRIVACY.</revremark>
       </revision>

       <revision>
 	<revnumber>0.24</revnumber>
 	<date>2008-03-04</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Added pixel formats Y16 and SBGGR16, new controls
 and a camera controls class. Removed VIDIOC_G/S_MPEGCOMP.</revremark>
       </revision>

       <revision>
 	<revnumber>0.23</revnumber>
 	<date>2007-08-30</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Fixed a typo in VIDIOC_DBG_G/S_REGISTER.
 Clarified the byte order of packed pixel formats.</revremark>
       </revision>

       <revision>
 	<revnumber>0.22</revnumber>
 	<date>2007-08-29</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Added the Video Output Overlay interface, new MPEG
 controls, V4L2_FIELD_INTERLACED_TB and V4L2_FIELD_INTERLACED_BT,
 VIDIOC_DBG_G/S_REGISTER, VIDIOC_(TRY_)ENCODER_CMD,
 VIDIOC_G_CHIP_IDENT, VIDIOC_G_ENC_INDEX, new pixel formats.
 Clarifications in the cropping chapter, about RGB pixel formats, the
 mmap(), poll(), select(), read() and write() functions. Typographical
 fixes.</revremark>
       </revision>

       <revision>
 	<revnumber>0.21</revnumber>
 	<date>2006-12-19</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Fixed a link in the VIDIOC_G_EXT_CTRLS section.</revremark>
       </revision>

       <revision>
 	<revnumber>0.20</revnumber>
 	<date>2006-11-24</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Clarified the purpose of the audioset field in
 struct v4l2_input and v4l2_output.</revremark>
       </revision>

       <revision>
 	<revnumber>0.19</revnumber>
 	<date>2006-10-19</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Documented V4L2_PIX_FMT_RGB444.</revremark>
       </revision>

       <revision>
 	<revnumber>0.18</revnumber>
 	<date>2006-10-18</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Added the description of extended controls by Hans
 Verkuil. Linked V4L2_PIX_FMT_MPEG to V4L2_CID_MPEG_STREAM_TYPE.</revremark>
       </revision>

       <revision>
 	<revnumber>0.17</revnumber>
 	<date>2006-10-12</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Corrected V4L2_PIX_FMT_HM12 description.</revremark>
       </revision>

       <revision>
 	<revnumber>0.16</revnumber>
 	<date>2006-10-08</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>VIDIOC_ENUM_FRAMESIZES and
 VIDIOC_ENUM_FRAMEINTERVALS are now part of the API.</revremark>
       </revision>

       <revision>
 	<revnumber>0.15</revnumber>
 	<date>2006-09-23</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Cleaned up the bibliography, added BT.653 and
 BT.1119. capture.c/start_capturing() for user pointer I/O did not
 initialize the buffer index. Documented the V4L MPEG and MJPEG
 VID_TYPEs and V4L2_PIX_FMT_SBGGR8. Updated the list of reserved pixel
 formats. See the history chapter for API changes.</revremark>
       </revision>

       <revision>
 	<revnumber>0.14</revnumber>
 	<date>2006-09-14</date>
 	<authorinitials>mr</authorinitials>
 	<revremark>Added VIDIOC_ENUM_FRAMESIZES and
 VIDIOC_ENUM_FRAMEINTERVALS proposal for frame format enumeration of
 digital devices.</revremark>
       </revision>

       <revision>
 	<revnumber>0.13</revnumber>
 	<date>2006-04-07</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Corrected the description of struct v4l2_window
 clips. New V4L2_STD_ and V4L2_TUNER_MODE_LANG1_LANG2
 defines.</revremark>
       </revision>

       <revision>
 	<revnumber>0.12</revnumber>
 	<date>2006-02-03</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Corrected the description of struct
 v4l2_captureparm and v4l2_outputparm.</revremark>
       </revision>

       <revision>
 	<revnumber>0.11</revnumber>
 	<date>2006-01-27</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Improved the description of struct
 v4l2_tuner.</revremark>
       </revision>

       <revision>
 	<revnumber>0.10</revnumber>
 	<date>2006-01-10</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>VIDIOC_G_INPUT and VIDIOC_S_PARM
 clarifications.</revremark>
       </revision>

       <revision>
 	<revnumber>0.9</revnumber>
 	<date>2005-11-27</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Improved the 525 line numbering diagram. Hans
 Verkuil and I rewrote the sliced VBI section. He also contributed a
 VIDIOC_LOG_STATUS page. Fixed VIDIOC_S_STD call in the video standard
 selection example. Various updates.</revremark>
       </revision>

       <revision>
 	<revnumber>0.8</revnumber>
 	<date>2004-10-04</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Somehow a piece of junk slipped into the capture
 example, removed.</revremark>
       </revision>

       <revision>
 	<revnumber>0.7</revnumber>
 	<date>2004-09-19</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Fixed video standard selection, control
 enumeration, downscaling and aspect example. Added read and user
 pointer i/o to video capture example.</revremark>
       </revision>

       <revision>
 	<revnumber>0.6</revnumber>
 	<date>2004-08-01</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>v4l2_buffer changes, added video capture example,
 various corrections.</revremark>
       </revision>

       <revision>
 	<revnumber>0.5</revnumber>
 	<date>2003-11-05</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Pixel format erratum.</revremark>
       </revision>

       <revision>
 	<revnumber>0.4</revnumber>
 	<date>2003-09-17</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Corrected source and Makefile to generate a PDF.
 SGML fixes. Added latest API changes. Closed gaps in the history
 chapter.</revremark>
       </revision>

       <revision>
 	<revnumber>0.3</revnumber>
 	<date>2003-02-05</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Another draft, more corrections.</revremark>
       </revision>

       <revision>
 	<revnumber>0.2</revnumber>
 	<date>2003-01-15</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>Second draft, with corrections pointed out by Gerd
 Knorr.</revremark>
       </revision>

       <revision>
 	<revnumber>0.1</revnumber>
 	<date>2002-12-01</date>
 	<authorinitials>mhs</authorinitials>
 	<revremark>First draft, based on documentation by Bill Dirks
 and discussions on the V4L mailing list.</revremark>
       </revision>
     </revhistory>
 </partinfo>

 <title>Video for Linux Two API Specification</title>
  <subtitle>Revision 2.6.38</subtitle>

   <chapter id="common">
     &sub-common;
   </chapter>

   <chapter id="pixfmt">
     &sub-pixfmt;
   </chapter>

   <chapter id="io">
     &sub-io;
   </chapter>

   <chapter id="devices">
     <title>Interfaces</title>

     <section id="capture"> &sub-dev-capture; </section>
     <section id="overlay"> &sub-dev-overlay; </section>
     <section id="output"> &sub-dev-output; </section>
     <section id="osd"> &sub-dev-osd; </section>
     <section id="codec"> &sub-dev-codec; </section>
     <section id="effect"> &sub-dev-effect; </section>
     <section id="raw-vbi"> &sub-dev-raw-vbi; </section>
     <section id="sliced"> &sub-dev-sliced-vbi; </section>
     <section id="ttx"> &sub-dev-teletext; </section>
     <section id="radio"> &sub-dev-radio; </section>
     <section id="rds"> &sub-dev-rds; </section>
     <section id="event"> &sub-dev-event; </section>
   </chapter>

   <chapter id="driver">
 	  &sub-driver;
   </chapter>

   <chapter id="libv4l">
 	  &sub-libv4l;
   </chapter>

   <chapter id="compat">
 	  &sub-compat;
   </chapter>

   <appendix id="user-func">
   <title>Function Reference</title>

     <!-- Keep this alphabetically sorted. -->

     &sub-close;
     &sub-ioctl;
     <!-- All ioctls go here. -->
     &sub-cropcap;
     &sub-dbg-g-chip-ident;
     &sub-dbg-g-register;
     &sub-dqevent;
     &sub-encoder-cmd;
     &sub-enumaudio;
     &sub-enumaudioout;
     &sub-enum-dv-presets;
     &sub-enum-fmt;
     &sub-enum-framesizes;
     &sub-enum-frameintervals;
     &sub-enuminput;
     &sub-enumoutput;
     &sub-enumstd;
     &sub-g-audio;
     &sub-g-audioout;
     &sub-g-crop;
     &sub-g-ctrl;
     &sub-g-dv-preset;
     &sub-g-dv-timings;
     &sub-g-enc-index;
     &sub-g-ext-ctrls;
     &sub-g-fbuf;
     &sub-g-fmt;
     &sub-g-frequency;
     &sub-g-input;
     &sub-g-jpegcomp;
     &sub-g-modulator;
     &sub-g-output;
     &sub-g-parm;
     &sub-g-priority;
     &sub-g-sliced-vbi-cap;
     &sub-g-std;
     &sub-g-tuner;
     &sub-log-status;
     &sub-overlay;
     &sub-qbuf;
     &sub-querybuf;
     &sub-querycap;
     &sub-queryctrl;
     &sub-query-dv-preset;
     &sub-querystd;
     &sub-reqbufs;
     &sub-s-hw-freq-seek;
     &sub-streamon;
     &sub-subscribe-event;
     <!-- End of ioctls. -->
     &sub-mmap;
     &sub-munmap;
     &sub-open;
     &sub-poll;
     &sub-read;
     &sub-select;
     &sub-write;
   </appendix>

   <appendix id="videodev">
     <title>Video For Linux Two Header File</title>
     &sub-videodev2-h;
   </appendix>

   <appendix id="capture-example">
     <title>Video Capture Example</title>
     &sub-capture-c;
   </appendix>

   <appendix id="v4l2grab-example">
     <title>Video Grabber example using libv4l</title>
     <para>This program demonstrates how to grab V4L2 images in ppm format by
 using libv4l handlers. The advantage is that this grabber can potentially work
 with any V4L2 driver.</para>
     &sub-v4l2grab-c;
   </appendix>

   &sub-media-indices;

   &sub-biblio;
	<partinfo>
	<authorgroup>
	<author>
	<firstname>Michael</firstname>
	<surname>Schimek</surname>
	<othername role="mi">H</othername>
	<affiliation>
	<address>
	<email>mschimek@gmx.at</email>
	</address>
	</affiliation>
	</author>

	<author>
	<firstname>Bill</firstname>
	<surname>Dirks</surname>
	<!-- Commented until Bill opts in to be spammed.
	<affiliation>
	<address>
	<email>bill@thedirks.org</email>
	</address>
	</affiliation> -->
	<contrib>Original author of the V4L2 API and
	documentation.</contrib>
	</author>

	<author>
	<firstname>Hans</firstname>
	<surname>Verkuil</surname>
	<contrib>Designed and documented the VIDIOC_LOG_STATUS ioctl,
	the extended control ioctls and major parts of the sliced VBI
	API.</contrib>
	<affiliation>
	<address>
	<email>hverkuil@xs4all.nl</email>
	</address>
	</affiliation>
	</author>

	<author>
	<firstname>Martin</firstname>
	<surname>Rubli</surname>
	<!--
	<affiliation>
	<address>
	<email>martin_rubli@logitech.com</email>
	</address>
	</affiliation> -->
	<contrib>Designed and documented the VIDIOC_ENUM_FRAMESIZES
	and VIDIOC_ENUM_FRAMEINTERVALS ioctls.</contrib>
	</author>

	<author>
	<firstname>Andy</firstname>
	<surname>Walls</surname>
	<contrib>Documented the fielded V4L2_MPEG_STREAM_VBI_FMT_IVTV
	MPEG stream embedded, sliced VBI data format in this specification.
	</contrib>
	<affiliation>
	<address>
	<email>awalls@md.metrocast.net</email>
	</address>
	</affiliation>
	</author>

	<author>
	<firstname>Mauro</firstname>
	<surname>Carvalho Chehab</surname>
	<contrib>Documented libv4l, designed and added v4l2grab example,
	Remote Controller chapter.</contrib>
	<affiliation>
	<address>
	<email>mchehab@redhat.com</email>
	</address>
	</affiliation>
	</author>

	<author>
	<firstname>Muralidharan</firstname>
	<surname>Karicheri</surname>
	<contrib>Documented the Digital Video timings API.</contrib>
	<affiliation>
	<address>
	<email>m-karicheri2@ti.com</email>
	</address>
	</affiliation>
	</author>
	</authorgroup>

	<copyright>
	<year>1999</year>
	<year>2000</year>
	<year>2001</year>
	<year>2002</year>
	<year>2003</year>
	<year>2004</year>
	<year>2005</year>
	<year>2006</year>
	<year>2007</year>
	<year>2008</year>
	<year>2009</year>
	<year>2010</year>
	<year>2011</year>
	<holder>Bill Dirks, Michael H. Schimek, Hans Verkuil, Martin
	Rubli, Andy Walls, Muralidharan Karicheri, Mauro Carvalho Chehab</holder>
	</copyright>
	<legalnotice>
	<para>Except when explicitly stated as GPL, programming examples within
	this part can be used and distributed without restrictions.</para>
	</legalnotice>
	<revhistory>
	<!-- Put document revisions here, newest first. -->
	<!-- API revisions (changes and additions of defines, enums,
	structs, ioctls) must be noted in more detail in the history chapter
	(compat.xml), along with the possible impact on existing drivers and
	applications. -->

	<revision>
	<revnumber>2.6.37</revnumber>
	<date>2010-08-06</date>
	<authorinitials>hv</authorinitials>
	<revremark>Removed obsolete vtx (videotext) API.</revremark>
	</revision>

	<revision>
	<revnumber>2.6.33</revnumber>
	<date>2009-12-03</date>
	<authorinitials>mk</authorinitials>
	<revremark>Added documentation for the Digital Video timings API.</revremark>
	</revision>

	<revision>
	<revnumber>2.6.32</revnumber>
	<date>2009-08-31</date>
	<authorinitials>mcc</authorinitials>
	<revremark>Now, revisions will match the kernel version where
	the V4L2 API changes will be used by the Linux Kernel.
	Also added Remote Controller chapter.</revremark>
	</revision>

	<revision>
	<revnumber>0.29</revnumber>
	<date>2009-08-26</date>
	<authorinitials>ev</authorinitials>
	<revremark>Added documentation for string controls and for FM Transmitter controls.</revremark>
	</revision>

	<revision>
	<revnumber>0.28</revnumber>
	<date>2009-08-26</date>
	<authorinitials>gl</authorinitials>
	<revremark>Added V4L2_CID_BAND_STOP_FILTER documentation.</revremark>
	</revision>

	<revision>
	<revnumber>0.27</revnumber>
	<date>2009-08-15</date>
	<authorinitials>mcc</authorinitials>
	<revremark>Added libv4l and Remote Controller documentation;
	added v4l2grab and keytable application examples.</revremark>
	</revision>

	<revision>
	<revnumber>0.26</revnumber>
	<date>2009-07-23</date>
	<authorinitials>hv</authorinitials>
	<revremark>Finalized the RDS capture API. Added modulator and RDS encoder
	capabilities. Added support for string controls.</revremark>
	</revision>

	<revision>
	<revnumber>0.25</revnumber>
	<date>2009-01-18</date>
	<authorinitials>hv</authorinitials>
	<revremark>Added pixel formats VYUY, NV16 and NV61, and changed
	the debug ioctls VIDIOC_DBG_G/S_REGISTER and VIDIOC_DBG_G_CHIP_IDENT.
	Added camera controls V4L2_CID_ZOOM_ABSOLUTE, V4L2_CID_ZOOM_RELATIVE,
	V4L2_CID_ZOOM_CONTINUOUS and V4L2_CID_PRIVACY.</revremark>
	</revision>

	<revision>
	<revnumber>0.24</revnumber>
	<date>2008-03-04</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Added pixel formats Y16 and SBGGR16, new controls
	and a camera controls class. Removed VIDIOC_G/S_MPEGCOMP.</revremark>
	</revision>

	<revision>
	<revnumber>0.23</revnumber>
	<date>2007-08-30</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Fixed a typo in VIDIOC_DBG_G/S_REGISTER.
	Clarified the byte order of packed pixel formats.</revremark>
	</revision>

	<revision>
	<revnumber>0.22</revnumber>
	<date>2007-08-29</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Added the Video Output Overlay interface, new MPEG
	controls, V4L2_FIELD_INTERLACED_TB and V4L2_FIELD_INTERLACED_BT,
	VIDIOC_DBG_G/S_REGISTER, VIDIOC_(TRY_)ENCODER_CMD,
	VIDIOC_G_CHIP_IDENT, VIDIOC_G_ENC_INDEX, new pixel formats.
	Clarifications in the cropping chapter, about RGB pixel formats, the
	mmap(), poll(), select(), read() and write() functions. Typographical
	fixes.</revremark>
	</revision>

	<revision>
	<revnumber>0.21</revnumber>
	<date>2006-12-19</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Fixed a link in the VIDIOC_G_EXT_CTRLS section.</revremark>
	</revision>

	<revision>
	<revnumber>0.20</revnumber>
	<date>2006-11-24</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Clarified the purpose of the audioset field in
	struct v4l2_input and v4l2_output.</revremark>
	</revision>

	<revision>
	<revnumber>0.19</revnumber>
	<date>2006-10-19</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Documented V4L2_PIX_FMT_RGB444.</revremark>
	</revision>

	<revision>
	<revnumber>0.18</revnumber>
	<date>2006-10-18</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Added the description of extended controls by Hans
	Verkuil. Linked V4L2_PIX_FMT_MPEG to V4L2_CID_MPEG_STREAM_TYPE.</revremark>
	</revision>

	<revision>
	<revnumber>0.17</revnumber>
	<date>2006-10-12</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Corrected V4L2_PIX_FMT_HM12 description.</revremark>
	</revision>

	<revision>
	<revnumber>0.16</revnumber>
	<date>2006-10-08</date>
	<authorinitials>mhs</authorinitials>
	<revremark>VIDIOC_ENUM_FRAMESIZES and
	VIDIOC_ENUM_FRAMEINTERVALS are now part of the API.</revremark>
	</revision>

	<revision>
	<revnumber>0.15</revnumber>
	<date>2006-09-23</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Cleaned up the bibliography, added BT.653 and
	BT.1119. capture.c/start_capturing() for user pointer I/O did not
	initialize the buffer index. Documented the V4L MPEG and MJPEG
	VID_TYPEs and V4L2_PIX_FMT_SBGGR8. Updated the list of reserved pixel
	formats. See the history chapter for API changes.</revremark>
	</revision>

	<revision>
	<revnumber>0.14</revnumber>
	<date>2006-09-14</date>
	<authorinitials>mr</authorinitials>
	<revremark>Added VIDIOC_ENUM_FRAMESIZES and
	VIDIOC_ENUM_FRAMEINTERVALS proposal for frame format enumeration of
	digital devices.</revremark>
	</revision>

	<revision>
	<revnumber>0.13</revnumber>
	<date>2006-04-07</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Corrected the description of struct v4l2_window
	clips. New V4L2_STD_ and V4L2_TUNER_MODE_LANG1_LANG2
	defines.</revremark>
	</revision>

	<revision>
	<revnumber>0.12</revnumber>
	<date>2006-02-03</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Corrected the description of struct
	v4l2_captureparm and v4l2_outputparm.</revremark>
	</revision>

	<revision>
	<revnumber>0.11</revnumber>
	<date>2006-01-27</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Improved the description of struct
	v4l2_tuner.</revremark>
	</revision>

	<revision>
	<revnumber>0.10</revnumber>
	<date>2006-01-10</date>
	<authorinitials>mhs</authorinitials>
	<revremark>VIDIOC_G_INPUT and VIDIOC_S_PARM
	clarifications.</revremark>
	</revision>

	<revision>
	<revnumber>0.9</revnumber>
	<date>2005-11-27</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Improved the 525 line numbering diagram. Hans
	Verkuil and I rewrote the sliced VBI section. He also contributed a
	VIDIOC_LOG_STATUS page. Fixed VIDIOC_S_STD call in the video standard
	selection example. Various updates.</revremark>
	</revision>

	<revision>
	<revnumber>0.8</revnumber>
	<date>2004-10-04</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Somehow a piece of junk slipped into the capture
	example, removed.</revremark>
	</revision>

	<revision>
	<revnumber>0.7</revnumber>
	<date>2004-09-19</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Fixed video standard selection, control
	enumeration, downscaling and aspect example. Added read and user
	pointer i/o to video capture example.</revremark>
	</revision>

	<revision>
	<revnumber>0.6</revnumber>
	<date>2004-08-01</date>
	<authorinitials>mhs</authorinitials>
	<revremark>v4l2_buffer changes, added video capture example,
	various corrections.</revremark>
	</revision>

	<revision>
	<revnumber>0.5</revnumber>
	<date>2003-11-05</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Pixel format erratum.</revremark>
	</revision>

	<revision>
	<revnumber>0.4</revnumber>
	<date>2003-09-17</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Corrected source and Makefile to generate a PDF.
	SGML fixes. Added latest API changes. Closed gaps in the history
	chapter.</revremark>
	</revision>

	<revision>
	<revnumber>0.3</revnumber>
	<date>2003-02-05</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Another draft, more corrections.</revremark>
	</revision>

	<revision>
	<revnumber>0.2</revnumber>
	<date>2003-01-15</date>
	<authorinitials>mhs</authorinitials>
	<revremark>Second draft, with corrections pointed out by Gerd
	Knorr.</revremark>
	</revision>

	<revision>
	<revnumber>0.1</revnumber>
	<date>2002-12-01</date>
	<authorinitials>mhs</authorinitials>
	<revremark>First draft, based on documentation by Bill Dirks
	and discussions on the V4L mailing list.</revremark>
	</revision>
	</revhistory>
	</partinfo>

	<title>Video for Linux Two API Specification</title>
	<subtitle>Revision 2.6.38</subtitle>

	<chapter id="common">
	&sub-common;
	</chapter>

	<chapter id="pixfmt">
	&sub-pixfmt;
	</chapter>

	<chapter id="io">
	&sub-io;
	</chapter>

	<chapter id="devices">
	<title>Interfaces</title>

	<section id="capture"> &sub-dev-capture; </section>
	<section id="overlay"> &sub-dev-overlay; </section>
	<section id="output"> &sub-dev-output; </section>
	<section id="osd"> &sub-dev-osd; </section>
	<section id="codec"> &sub-dev-codec; </section>
	<section id="effect"> &sub-dev-effect; </section>
	<section id="raw-vbi"> &sub-dev-raw-vbi; </section>
	<section id="sliced"> &sub-dev-sliced-vbi; </section>
	<section id="ttx"> &sub-dev-teletext; </section>
	<section id="radio"> &sub-dev-radio; </section>
	<section id="rds"> &sub-dev-rds; </section>
	<section id="event"> &sub-dev-event; </section>
	</chapter>

	<chapter id="driver">
	&sub-driver;
	</chapter>

	<chapter id="libv4l">
	&sub-libv4l;
	</chapter>

	<chapter id="compat">
	&sub-compat;
	</chapter>

	<appendix id="user-func">
	<title>Function Reference</title>

	<!-- Keep this alphabetically sorted. -->

	&sub-close;
	&sub-ioctl;
	<!-- All ioctls go here. -->
	&sub-cropcap;
	&sub-dbg-g-chip-ident;
	&sub-dbg-g-register;
	&sub-dqevent;
	&sub-encoder-cmd;
	&sub-enumaudio;
	&sub-enumaudioout;
	&sub-enum-dv-presets;
	&sub-enum-fmt;
	&sub-enum-framesizes;
	&sub-enum-frameintervals;
	&sub-enuminput;
	&sub-enumoutput;
	&sub-enumstd;
	&sub-g-audio;
	&sub-g-audioout;
	&sub-g-crop;
	&sub-g-ctrl;
	&sub-g-dv-preset;
	&sub-g-dv-timings;
	&sub-g-enc-index;
	&sub-g-ext-ctrls;
	&sub-g-fbuf;
	&sub-g-fmt;
	&sub-g-frequency;
	&sub-g-input;
	&sub-g-jpegcomp;
	&sub-g-modulator;
	&sub-g-output;
	&sub-g-parm;
	&sub-g-priority;
	&sub-g-sliced-vbi-cap;
	&sub-g-std;
	&sub-g-tuner;
	&sub-log-status;
	&sub-overlay;
	&sub-qbuf;
	&sub-querybuf;
	&sub-querycap;
	&sub-queryctrl;
	&sub-query-dv-preset;
	&sub-querystd;
	&sub-reqbufs;
	&sub-s-hw-freq-seek;
	&sub-streamon;
	&sub-subscribe-event;
	<!-- End of ioctls. -->
	&sub-mmap;
	&sub-munmap;
	&sub-open;
	&sub-poll;
	&sub-read;
	&sub-select;
	&sub-write;
	</appendix>

	<appendix id="videodev">
	<title>Video For Linux Two Header File</title>
	&sub-videodev2-h;
	</appendix>

	<appendix id="capture-example">
	<title>Video Capture Example</title>
	&sub-capture-c;
	</appendix>

	<appendix id="v4l2grab-example">
	<title>Video Grabber example using libv4l</title>
	<para>This program demonstrates how to grab V4L2 images in ppm format by
	using libv4l handlers. The advantage is that this grabber can potentially work
	with any V4L2 driver.</para>
	&sub-v4l2grab-c;
	</appendix>

	&sub-media-indices;

	&sub-biblio;