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