Documentation/DocBook/media/v4l/v4l2.xml

   1  <partinfo>
   2     <authorgroup>
   3       <author>
   4         <firstname>Michael</firstname>
   5         <surname>Schimek</surname>
   6         <othername role="mi">H</othername>
   7         <affiliation>
   8           <address>
   9             <email>mschimek@gmx.at</email>
  10           </address>
  11         </affiliation>
  12       </author>
  13
  14       <author>
  15         <firstname>Bill</firstname>
  16         <surname>Dirks</surname>
  17         <!-- Commented until Bill opts in to be spammed.
  18         <affiliation>
  19           <address>
  20             <email>bill@thedirks.org</email>
  21           </address>
  22         </affiliation> -->
  23         <contrib>Original author of the V4L2 API and
  24 documentation.</contrib>
  25       </author>
  26
  27       <author>
  28         <firstname>Hans</firstname>
  29         <surname>Verkuil</surname>
  30         <contrib>Designed and documented the VIDIOC_LOG_STATUS ioctl,
  31 the extended control ioctls, major parts of the sliced VBI API, the
  32 MPEG encoder and decoder APIs and the DV Timings API.</contrib>
  33         <affiliation>
  34           <address>
  35             <email>hverkuil@xs4all.nl</email>
  36           </address>
  37         </affiliation>
  38       </author>
  39
  40       <author>
  41         <firstname>Martin</firstname>
  42         <surname>Rubli</surname>
  43         <!--
  44         <affiliation>
  45           <address>
  46             <email>martin_rubli@logitech.com</email>
  47           </address>
  48         </affiliation> -->
  49         <contrib>Designed and documented the VIDIOC_ENUM_FRAMESIZES
  50 and VIDIOC_ENUM_FRAMEINTERVALS ioctls.</contrib>
  51       </author>
  52
  53       <author>
  54         <firstname>Andy</firstname>
  55         <surname>Walls</surname>
  56         <contrib>Documented the fielded V4L2_MPEG_STREAM_VBI_FMT_IVTV
  57 MPEG stream embedded, sliced VBI data format in this specification.
  58 </contrib>
  59         <affiliation>
  60           <address>
  61             <email>awalls@md.metrocast.net</email>
  62           </address>
  63         </affiliation>
  64       </author>
  65
  66       <author>
  67         <firstname>Mauro</firstname>
  68         <surname>Carvalho Chehab</surname>
  69         <contrib>Documented libv4l, designed and added v4l2grab example,
  70 Remote Controller chapter.</contrib>
  71         <affiliation>
  72           <address>
  73             <email>m.chehab@samsung.com</email>
  74           </address>
  75         </affiliation>
  76       </author>
  77
  78       <author>
  79         <firstname>Muralidharan</firstname>
  80         <surname>Karicheri</surname>
  81         <contrib>Documented the Digital Video timings API.</contrib>
  82         <affiliation>
  83           <address>
  84             <email>m-karicheri2@ti.com</email>
  85           </address>
  86         </affiliation>
  87       </author>
  88
  89       <author>
  90         <firstname>Pawel</firstname>
  91         <surname>Osciak</surname>
  92         <contrib>Designed and documented the multi-planar API.</contrib>
  93         <affiliation>
  94           <address>
  95             <email>pawel AT osciak.com</email>
  96           </address>
  97         </affiliation>
  98       </author>
  99
 100       <author>
 101         <firstname>Sakari</firstname>
 102         <surname>Ailus</surname>
 103         <contrib>Subdev selections API.</contrib>
 104         <affiliation>
 105           <address>
 106             <email>sakari.ailus@iki.fi</email>
 107           </address>
 108         </affiliation>
 109       </author>
 110     </authorgroup>
 111
 112     <copyright>
 113       <year>1999</year>
 114       <year>2000</year>
 115       <year>2001</year>
 116       <year>2002</year>
 117       <year>2003</year>
 118       <year>2004</year>
 119       <year>2005</year>
 120       <year>2006</year>
 121       <year>2007</year>
 122       <year>2008</year>
 123       <year>2009</year>
 124       <year>2010</year>
 125       <year>2011</year>
 126       <year>2012</year>
 127       <year>2013</year>
 128       <year>2014</year>
 129       <holder>Bill Dirks, Michael H. Schimek, Hans Verkuil, Martin
 130 Rubli, Andy Walls, Muralidharan Karicheri, Mauro Carvalho Chehab,
 131         Pawel Osciak</holder>
 132     </copyright>
 133     <legalnotice>
 134     <para>Except when explicitly stated as GPL, programming examples within
 135             this part can be used and distributed without restrictions.</para>
 136     </legalnotice>
 137     <revhistory>
 138       <!-- Put document revisions here, newest first. -->
 139       <!-- API revisions (changes and additions of defines, enums,
 140 structs, ioctls) must be noted in more detail in the history chapter
 141 (compat.xml), along with the possible impact on existing drivers and
 142 applications. -->
 143
 144       <revision>
 145         <revnumber>3.14</revnumber>
 146         <date>2013-11-25</date>
 147         <authorinitials>rr</authorinitials>
 148         <revremark>Set width and height as unsigned on v4l2_rect.
 149         </revremark>
 150       </revision>
 151
 152       <revision>
 153         <revnumber>3.11</revnumber>
 154         <date>2013-05-26</date>
 155         <authorinitials>hv</authorinitials>
 156         <revremark>Remove obsolete VIDIOC_DBG_G_CHIP_IDENT ioctl.
 157         </revremark>
 158       </revision>
 159
 160       <revision>
 161         <revnumber>3.10</revnumber>
 162         <date>2013-03-25</date>
 163         <authorinitials>hv</authorinitials>
 164         <revremark>Remove obsolete and unused DV_PRESET ioctls:
 165         VIDIOC_G_DV_PRESET, VIDIOC_S_DV_PRESET, VIDIOC_QUERY_DV_PRESET and
 166         VIDIOC_ENUM_DV_PRESET. Remove the related v4l2_input/output capability
 167         flags V4L2_IN_CAP_PRESETS and V4L2_OUT_CAP_PRESETS. Added VIDIOC_DBG_G_CHIP_INFO.
 168         </revremark>
 169       </revision>
 170
 171       <revision>
 172         <revnumber>3.9</revnumber>
 173         <date>2012-12-03</date>
 174         <authorinitials>sa, sn</authorinitials>
 175         <revremark>Added timestamp types to v4l2_buffer.
 176         Added V4L2_EVENT_CTRL_CH_RANGE control event changes flag.
 177         </revremark>
 178       </revision>
 179
 180       <revision>
 181         <revnumber>3.6</revnumber>
 182         <date>2012-07-02</date>
 183         <authorinitials>hv</authorinitials>
 184         <revremark>Added VIDIOC_ENUM_FREQ_BANDS.
 185         </revremark>
 186       </revision>
 187
 188       <revision>
 189         <revnumber>3.5</revnumber>
 190         <date>2012-05-07</date>
 191         <authorinitials>sa, sn, hv</authorinitials>
 192         <revremark>Added V4L2_CTRL_TYPE_INTEGER_MENU and V4L2 subdev
 193             selections API. Improved the description of V4L2_CID_COLORFX
 194             control, added V4L2_CID_COLORFX_CBCR control.
 195             Added camera controls V4L2_CID_AUTO_EXPOSURE_BIAS,
 196             V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE, V4L2_CID_IMAGE_STABILIZATION,
 197             V4L2_CID_ISO_SENSITIVITY, V4L2_CID_ISO_SENSITIVITY_AUTO,
 198             V4L2_CID_EXPOSURE_METERING, V4L2_CID_SCENE_MODE,
 199             V4L2_CID_3A_LOCK, V4L2_CID_AUTO_FOCUS_START,
 200             V4L2_CID_AUTO_FOCUS_STOP, V4L2_CID_AUTO_FOCUS_STATUS
 201             and V4L2_CID_AUTO_FOCUS_RANGE.
 202             Added VIDIOC_ENUM_DV_TIMINGS, VIDIOC_QUERY_DV_TIMINGS and
 203             VIDIOC_DV_TIMINGS_CAP.
 204         </revremark>
 205       </revision>
 206
 207       <revision>
 208         <revnumber>3.4</revnumber>
 209         <date>2012-01-25</date>
 210         <authorinitials>sn</authorinitials>
 211         <revremark>Added <link linkend="jpeg-controls">JPEG compression
 212             control class.</link>
 213         </revremark>
 214       </revision>
 215
 216       <revision>
 217         <revnumber>3.3</revnumber>
 218         <date>2012-01-11</date>
 219         <authorinitials>hv</authorinitials>
 220         <revremark>Added device_caps field to struct v4l2_capabilities.</revremark>
 221       </revision>
 222
 223       <revision>
 224         <revnumber>3.2</revnumber>
 225         <date>2011-08-26</date>
 226         <authorinitials>hv</authorinitials>
 227         <revremark>Added V4L2_CTRL_FLAG_VOLATILE.</revremark>
 228       </revision>
 229
 230       <revision>
 231         <revnumber>3.1</revnumber>
 232         <date>2011-06-27</date>
 233         <authorinitials>mcc, po, hv</authorinitials>
 234         <revremark>Documented that VIDIOC_QUERYCAP now returns a per-subsystem version instead of a per-driver one.
 235                    Standardize an error code for invalid ioctl.
 236                    Added V4L2_CTRL_TYPE_BITMASK.</revremark>
 237       </revision>
 238
 239       <revision>
 240         <revnumber>2.6.39</revnumber>
 241         <date>2011-03-01</date>
 242         <authorinitials>mcc, po</authorinitials>
 243         <revremark>Removed VIDIOC_*_OLD from videodev2.h header and update it to reflect latest changes. Added the <link linkend="planar-apis">multi-planar API</link>.</revremark>
 244       </revision>
 245
 246       <revision>
 247         <revnumber>2.6.37</revnumber>
 248         <date>2010-08-06</date>
 249         <authorinitials>hv</authorinitials>
 250         <revremark>Removed obsolete vtx (videotext) API.</revremark>
 251       </revision>
 252
 253       <revision>
 254         <revnumber>2.6.33</revnumber>
 255         <date>2009-12-03</date>
 256         <authorinitials>mk</authorinitials>
 257         <revremark>Added documentation for the Digital Video timings API.</revremark>
 258       </revision>
 259
 260       <revision>
 261         <revnumber>2.6.32</revnumber>
 262         <date>2009-08-31</date>
 263         <authorinitials>mcc</authorinitials>
 264         <revremark>Now, revisions will match the kernel version where
 265 the V4L2 API changes will be used by the Linux Kernel.
 266 Also added Remote Controller chapter.</revremark>
 267       </revision>
 268
 269       <revision>
 270         <revnumber>0.29</revnumber>
 271         <date>2009-08-26</date>
 272         <authorinitials>ev</authorinitials>
 273         <revremark>Added documentation for string controls and for FM Transmitter controls.</revremark>
 274       </revision>
 275
 276       <revision>
 277         <revnumber>0.28</revnumber>
 278         <date>2009-08-26</date>
 279         <authorinitials>gl</authorinitials>
 280         <revremark>Added V4L2_CID_BAND_STOP_FILTER documentation.</revremark>
 281       </revision>
 282
 283       <revision>
 284         <revnumber>0.27</revnumber>
 285         <date>2009-08-15</date>
 286         <authorinitials>mcc</authorinitials>
 287         <revremark>Added libv4l and Remote Controller documentation;
 288 added v4l2grab and keytable application examples.</revremark>
 289       </revision>
 290
 291       <revision>
 292         <revnumber>0.26</revnumber>
 293         <date>2009-07-23</date>
 294         <authorinitials>hv</authorinitials>
 295         <revremark>Finalized the RDS capture API. Added modulator and RDS encoder
 296 capabilities. Added support for string controls.</revremark>
 297       </revision>
 298
 299       <revision>
 300         <revnumber>0.25</revnumber>
 301         <date>2009-01-18</date>
 302         <authorinitials>hv</authorinitials>
 303         <revremark>Added pixel formats VYUY, NV16 and NV61, and changed
 304 the debug ioctls VIDIOC_DBG_G/S_REGISTER and VIDIOC_DBG_G_CHIP_IDENT.
 305 Added camera controls V4L2_CID_ZOOM_ABSOLUTE, V4L2_CID_ZOOM_RELATIVE,
 306 V4L2_CID_ZOOM_CONTINUOUS and V4L2_CID_PRIVACY.</revremark>
 307       </revision>
 308
 309       <revision>
 310         <revnumber>0.24</revnumber>
 311         <date>2008-03-04</date>
 312         <authorinitials>mhs</authorinitials>
 313         <revremark>Added pixel formats Y16 and SBGGR16, new controls
 314 and a camera controls class. Removed VIDIOC_G/S_MPEGCOMP.</revremark>
 315       </revision>
 316
 317       <revision>
 318         <revnumber>0.23</revnumber>
 319         <date>2007-08-30</date>
 320         <authorinitials>mhs</authorinitials>
 321         <revremark>Fixed a typo in VIDIOC_DBG_G/S_REGISTER.
 322 Clarified the byte order of packed pixel formats.</revremark>
 323       </revision>
 324
 325       <revision>
 326         <revnumber>0.22</revnumber>
 327         <date>2007-08-29</date>
 328         <authorinitials>mhs</authorinitials>
 329         <revremark>Added the Video Output Overlay interface, new MPEG
 330 controls, V4L2_FIELD_INTERLACED_TB and V4L2_FIELD_INTERLACED_BT,
 331 VIDIOC_DBG_G/S_REGISTER, VIDIOC_(TRY_)ENCODER_CMD,
 332 VIDIOC_G_CHIP_IDENT, VIDIOC_G_ENC_INDEX, new pixel formats.
 333 Clarifications in the cropping chapter, about RGB pixel formats, the
 334 mmap(), poll(), select(), read() and write() functions. Typographical
 335 fixes.</revremark>
 336       </revision>
 337
 338       <revision>
 339         <revnumber>0.21</revnumber>
 340         <date>2006-12-19</date>
 341         <authorinitials>mhs</authorinitials>
 342         <revremark>Fixed a link in the VIDIOC_G_EXT_CTRLS section.</revremark>
 343       </revision>
 344
 345       <revision>
 346         <revnumber>0.20</revnumber>
 347         <date>2006-11-24</date>
 348         <authorinitials>mhs</authorinitials>
 349         <revremark>Clarified the purpose of the audioset field in
 350 struct v4l2_input and v4l2_output.</revremark>
 351       </revision>
 352
 353       <revision>
 354         <revnumber>0.19</revnumber>
 355         <date>2006-10-19</date>
 356         <authorinitials>mhs</authorinitials>
 357         <revremark>Documented V4L2_PIX_FMT_RGB444.</revremark>
 358       </revision>
 359
 360       <revision>
 361         <revnumber>0.18</revnumber>
 362         <date>2006-10-18</date>
 363         <authorinitials>mhs</authorinitials>
 364         <revremark>Added the description of extended controls by Hans
 365 Verkuil. Linked V4L2_PIX_FMT_MPEG to V4L2_CID_MPEG_STREAM_TYPE.</revremark>
 366       </revision>
 367
 368       <revision>
 369         <revnumber>0.17</revnumber>
 370         <date>2006-10-12</date>
 371         <authorinitials>mhs</authorinitials>
 372         <revremark>Corrected V4L2_PIX_FMT_HM12 description.</revremark>
 373       </revision>
 374
 375       <revision>
 376         <revnumber>0.16</revnumber>
 377         <date>2006-10-08</date>
 378         <authorinitials>mhs</authorinitials>
 379         <revremark>VIDIOC_ENUM_FRAMESIZES and
 380 VIDIOC_ENUM_FRAMEINTERVALS are now part of the API.</revremark>
 381       </revision>
 382
 383       <revision>
 384         <revnumber>0.15</revnumber>
 385         <date>2006-09-23</date>
 386         <authorinitials>mhs</authorinitials>
 387         <revremark>Cleaned up the bibliography, added BT.653 and
 388 BT.1119. capture.c/start_capturing() for user pointer I/O did not
 389 initialize the buffer index. Documented the V4L MPEG and MJPEG
 390 VID_TYPEs and V4L2_PIX_FMT_SBGGR8. Updated the list of reserved pixel
 391 formats. See the history chapter for API changes.</revremark>
 392       </revision>
 393
 394       <revision>
 395         <revnumber>0.14</revnumber>
 396         <date>2006-09-14</date>
 397         <authorinitials>mr</authorinitials>
 398         <revremark>Added VIDIOC_ENUM_FRAMESIZES and
 399 VIDIOC_ENUM_FRAMEINTERVALS proposal for frame format enumeration of
 400 digital devices.</revremark>
 401       </revision>
 402
 403       <revision>
 404         <revnumber>0.13</revnumber>
 405         <date>2006-04-07</date>
 406         <authorinitials>mhs</authorinitials>
 407         <revremark>Corrected the description of struct v4l2_window
 408 clips. New V4L2_STD_ and V4L2_TUNER_MODE_LANG1_LANG2
 409 defines.</revremark>
 410       </revision>
 411
 412       <revision>
 413         <revnumber>0.12</revnumber>
 414         <date>2006-02-03</date>
 415         <authorinitials>mhs</authorinitials>
 416         <revremark>Corrected the description of struct
 417 v4l2_captureparm and v4l2_outputparm.</revremark>
 418       </revision>
 419
 420       <revision>
 421         <revnumber>0.11</revnumber>
 422         <date>2006-01-27</date>
 423         <authorinitials>mhs</authorinitials>
 424         <revremark>Improved the description of struct
 425 v4l2_tuner.</revremark>
 426       </revision>
 427
 428       <revision>
 429         <revnumber>0.10</revnumber>
 430         <date>2006-01-10</date>
 431         <authorinitials>mhs</authorinitials>
 432         <revremark>VIDIOC_G_INPUT and VIDIOC_S_PARM
 433 clarifications.</revremark>
 434       </revision>
 435
 436       <revision>
 437         <revnumber>0.9</revnumber>
 438         <date>2005-11-27</date>
 439         <authorinitials>mhs</authorinitials>
 440         <revremark>Improved the 525 line numbering diagram. Hans
 441 Verkuil and I rewrote the sliced VBI section. He also contributed a
 442 VIDIOC_LOG_STATUS page. Fixed VIDIOC_S_STD call in the video standard
 443 selection example. Various updates.</revremark>
 444       </revision>
 445
 446       <revision>
 447         <revnumber>0.8</revnumber>
 448         <date>2004-10-04</date>
 449         <authorinitials>mhs</authorinitials>
 450         <revremark>Somehow a piece of junk slipped into the capture
 451 example, removed.</revremark>
 452       </revision>
 453
 454       <revision>
 455         <revnumber>0.7</revnumber>
 456         <date>2004-09-19</date>
 457         <authorinitials>mhs</authorinitials>
 458         <revremark>Fixed video standard selection, control
 459 enumeration, downscaling and aspect example. Added read and user
 460 pointer i/o to video capture example.</revremark>
 461       </revision>
 462
 463       <revision>
 464         <revnumber>0.6</revnumber>
 465         <date>2004-08-01</date>
 466         <authorinitials>mhs</authorinitials>
 467         <revremark>v4l2_buffer changes, added video capture example,
 468 various corrections.</revremark>
 469       </revision>
 470
 471       <revision>
 472         <revnumber>0.5</revnumber>
 473         <date>2003-11-05</date>
 474         <authorinitials>mhs</authorinitials>
 475         <revremark>Pixel format erratum.</revremark>
 476       </revision>
 477
 478       <revision>
 479         <revnumber>0.4</revnumber>
 480         <date>2003-09-17</date>
 481         <authorinitials>mhs</authorinitials>
 482         <revremark>Corrected source and Makefile to generate a PDF.
 483 SGML fixes. Added latest API changes. Closed gaps in the history
 484 chapter.</revremark>
 485       </revision>
 486
 487       <revision>
 488         <revnumber>0.3</revnumber>
 489         <date>2003-02-05</date>
 490         <authorinitials>mhs</authorinitials>
 491         <revremark>Another draft, more corrections.</revremark>
 492       </revision>
 493
 494       <revision>
 495         <revnumber>0.2</revnumber>
 496         <date>2003-01-15</date>
 497         <authorinitials>mhs</authorinitials>
 498         <revremark>Second draft, with corrections pointed out by Gerd
 499 Knorr.</revremark>
 500       </revision>
 501
 502       <revision>
 503         <revnumber>0.1</revnumber>
 504         <date>2002-12-01</date>
 505         <authorinitials>mhs</authorinitials>
 506         <revremark>First draft, based on documentation by Bill Dirks
 507 and discussions on the V4L mailing list.</revremark>
 508       </revision>
 509     </revhistory>
 510 </partinfo>
 511
 512 <title>Video for Linux Two API Specification</title>
 513  <subtitle>Revision 3.14</subtitle>
 514
 515   <chapter id="common">
 516     &sub-common;
 517   </chapter>
 518
 519   <chapter id="pixfmt">
 520     &sub-pixfmt;
 521   </chapter>
 522
 523   <chapter id="io">
 524     &sub-io;
 525   </chapter>
 526
 527   <chapter id="devices">
 528     <title>Interfaces</title>
 529
 530     <section id="capture"> &sub-dev-capture; </section>
 531     <section id="overlay"> &sub-dev-overlay; </section>
 532     <section id="output"> &sub-dev-output; </section>
 533     <section id="osd"> &sub-dev-osd; </section>
 534     <section id="codec"> &sub-dev-codec; </section>
 535     <section id="effect"> &sub-dev-effect; </section>
 536     <section id="raw-vbi"> &sub-dev-raw-vbi; </section>
 537     <section id="sliced"> &sub-dev-sliced-vbi; </section>
 538     <section id="ttx"> &sub-dev-teletext; </section>
 539     <section id="radio"> &sub-dev-radio; </section>
 540     <section id="rds"> &sub-dev-rds; </section>
 541     <section id="event"> &sub-dev-event; </section>
 542     <section id="subdev"> &sub-dev-subdev; </section>
 543   </chapter>
 544
 545   <chapter id="driver">
 546           &sub-driver;
 547   </chapter>
 548
 549   <chapter id="libv4l">
 550           &sub-libv4l;
 551   </chapter>
 552
 553   <chapter id="compat">
 554           &sub-compat;
 555   </chapter>
 556
 557   <appendix id="user-func">
 558   <title>Function Reference</title>
 559
 560     <!-- Keep this alphabetically sorted. -->
 561
 562     &sub-close;
 563     &sub-ioctl;
 564     <!-- All ioctls go here. -->
 565     &sub-create-bufs;
 566     &sub-cropcap;
 567     &sub-dbg-g-chip-info;
 568     &sub-dbg-g-register;
 569     &sub-decoder-cmd;
 570     &sub-dqevent;
 571     &sub-dv-timings-cap;
 572     &sub-encoder-cmd;
 573     &sub-enumaudio;
 574     &sub-enumaudioout;
 575     &sub-enum-dv-timings;
 576     &sub-enum-fmt;
 577     &sub-enum-framesizes;
 578     &sub-enum-frameintervals;
 579     &sub-enum-freq-bands;
 580     &sub-enuminput;
 581     &sub-enumoutput;
 582     &sub-enumstd;
 583     &sub-expbuf;
 584     &sub-g-audio;
 585     &sub-g-audioout;
 586     &sub-g-crop;
 587     &sub-g-ctrl;
 588     &sub-g-dv-timings;
 589     &sub-g-enc-index;
 590     &sub-g-ext-ctrls;
 591     &sub-g-fbuf;
 592     &sub-g-fmt;
 593     &sub-g-frequency;
 594     &sub-g-input;
 595     &sub-g-jpegcomp;
 596     &sub-g-modulator;
 597     &sub-g-output;
 598     &sub-g-parm;
 599     &sub-g-priority;
 600     &sub-g-selection;
 601     &sub-g-sliced-vbi-cap;
 602     &sub-g-std;
 603     &sub-g-tuner;
 604     &sub-log-status;
 605     &sub-overlay;
 606     &sub-prepare-buf;
 607     &sub-qbuf;
 608     &sub-querybuf;
 609     &sub-querycap;
 610     &sub-queryctrl;
 611     &sub-query-dv-timings;
 612     &sub-querystd;
 613     &sub-reqbufs;
 614     &sub-s-hw-freq-seek;
 615     &sub-streamon;
 616     &sub-subdev-enum-frame-interval;
 617     &sub-subdev-enum-frame-size;
 618     &sub-subdev-enum-mbus-code;
 619     &sub-subdev-g-crop;
 620     &sub-subdev-g-edid;
 621     &sub-subdev-g-fmt;
 622     &sub-subdev-g-frame-interval;
 623     &sub-subdev-g-selection;
 624     &sub-subscribe-event;
 625     <!-- End of ioctls. -->
 626     &sub-mmap;
 627     &sub-munmap;
 628     &sub-open;
 629     &sub-poll;
 630     &sub-read;
 631     &sub-select;
 632     &sub-write;
 633   </appendix>
 634
 635   <appendix>
 636     <title>Common definitions for V4L2 and V4L2 subdev interfaces</title>
 637       &sub-selections-common;
 638   </appendix>
 639
 640   <appendix id="videodev">
 641     <title>Video For Linux Two Header File</title>
 642     &sub-videodev2-h;
 643   </appendix>
 644
 645   <appendix id="capture-example">
 646     <title>Video Capture Example</title>
 647     &sub-capture-c;
 648   </appendix>
 649
 650   <appendix id="v4l2grab-example">
 651     <title>Video Grabber example using libv4l</title>
 652     <para>This program demonstrates how to grab V4L2 images in ppm format by
 653 using libv4l handlers. The advantage is that this grabber can potentially work
 654 with any V4L2 driver.</para>
 655     &sub-v4l2grab-c;
 656   </appendix>
 657
 658   &sub-media-indices;
 659
 660   &sub-biblio;
 661