Home | History | Annotate | Download | only in spec 
      1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
      2 <HTML
      3 ><HEAD
      4 ><TITLE
      5 >Video for Linux Two API Specification</TITLE
      6 ><META
      7 NAME="GENERATOR"
      8 CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
      9 REL="NEXT"
     10 TITLE="Introduction"
     11 HREF="f163.htm"></HEAD
     12 ><BODY
     13 CLASS="BOOK"
     14 BGCOLOR="#FFFFFF"
     15 TEXT="#000000"
     16 LINK="#0000FF"
     17 VLINK="#840084"
     18 ALINK="#0000FF"
     19 ><DIV
     20 CLASS="BOOK"
     21 ><A
     22 NAME="V4L2SPEC"
     23 ></A
     24 ><DIV
     25 CLASS="TITLEPAGE"
     26 ><H1
     27 CLASS="TITLE"
     28 ><A
     29 NAME="AEN2"
     30 >Video for Linux Two API Specification</A
     31 ></H1
     32 ><H2
     33 CLASS="SUBTITLE"
     34 >Revision 0.24</H2
     35 ><H3
     36 CLASS="AUTHOR"
     37 ><A
     38 NAME="AEN6"
     39 ></A
     40 >Michael H Schimek</H3
     41 ><DIV
     42 CLASS="AFFILIATION"
     43 ><DIV
     44 CLASS="ADDRESS"
     45 ><P
     46 CLASS="ADDRESS"
     47 >&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<CODE
     48 CLASS="EMAIL"
     49 >&#60;<A
     50 HREF="mailto:mschimek (a] gmx.at"
     51 >mschimek (a] gmx.at</A
     52 >&#62;</CODE
     53 ><br>
     54 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P
     55 ></DIV
     56 ></DIV
     57 ><H3
     58 CLASS="AUTHOR"
     59 ><A
     60 NAME="AEN13"
     61 ></A
     62 >Bill Dirks</H3
     63 ><H3
     64 CLASS="AUTHOR"
     65 ><A
     66 NAME="AEN17"
     67 ></A
     68 >Hans Verkuil</H3
     69 ><H3
     70 CLASS="AUTHOR"
     71 ><A
     72 NAME="AEN21"
     73 ></A
     74 >Martin Rubli</H3
     75 ><P
     76 CLASS="COPYRIGHT"
     77 >Copyright &copy; 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Bill Dirks, Michael H. Schimek, Hans Verkuil, Martin
     78 Rubli</P
     79 ><DIV
     80 CLASS="LEGALNOTICE"
     81 ><P
     82 ></P
     83 ><A
     84 NAME="AEN37"
     85 ></A
     86 ><P
     87 >This document is copyrighted &copy; 1999-2008 by Bill
     88 Dirks, Michael H. Schimek, Hans Verkuil and Martin Rubli.</P
     89 ><P
     90 >Permission is granted to copy, distribute and/or modify
     91 this document under the terms of the GNU Free Documentation License,
     92 Version 1.1 or any later version published by the Free Software
     93 Foundation; with no Invariant Sections, with no Front-Cover Texts, and
     94 with no Back-Cover Texts. A copy of the license is included in the
     95 appendix entitled "GNU Free Documentation License".</P
     96 ><P
     97 >Programming examples can be used and distributed without
     98 restrictions.</P
     99 ><P
    100 ></P
    101 ></DIV
    102 ><HR></DIV
    103 ><DIV
    104 CLASS="TOC"
    105 ><DL
    106 ><DT
    107 ><B
    108 >Table of Contents</B
    109 ></DT
    110 ><DT
    111 ><A
    112 HREF="f163.htm"
    113 >Introduction</A
    114 ></DT
    115 ><DT
    116 >1. <A
    117 HREF="c174.htm"
    118 >Common API Elements</A
    119 ></DT
    120 ><DD
    121 ><DL
    122 ><DT
    123 >1.1. <A
    124 HREF="c174.htm#OPEN"
    125 >Opening and Closing Devices</A
    126 ></DT
    127 ><DD
    128 ><DL
    129 ><DT
    130 >1.1.1. <A
    131 HREF="c174.htm#AEN194"
    132 >Device Naming</A
    133 ></DT
    134 ><DT
    135 >1.1.2. <A
    136 HREF="c174.htm#RELATED"
    137 >Related Devices</A
    138 ></DT
    139 ><DT
    140 >1.1.3. <A
    141 HREF="c174.htm#AEN249"
    142 >Multiple Opens</A
    143 ></DT
    144 ><DT
    145 >1.1.4. <A
    146 HREF="c174.htm#AEN270"
    147 >Shared Data Streams</A
    148 ></DT
    149 ><DT
    150 >1.1.5. <A
    151 HREF="c174.htm#AEN273"
    152 >Functions</A
    153 ></DT
    154 ></DL
    155 ></DD
    156 ><DT
    157 >1.2. <A
    158 HREF="x282.htm"
    159 >Querying Capabilities</A
    160 ></DT
    161 ><DT
    162 >1.3. <A
    163 HREF="x294.htm"
    164 >Application Priority</A
    165 ></DT
    166 ><DT
    167 >1.4. <A
    168 HREF="x309.htm"
    169 >Video Inputs and Outputs</A
    170 ></DT
    171 ><DT
    172 >1.5. <A
    173 HREF="x341.htm"
    174 >Audio Inputs and Outputs</A
    175 ></DT
    176 ><DT
    177 >1.6. <A
    178 HREF="x394.htm"
    179 >Tuners and Modulators</A
    180 ></DT
    181 ><DD
    182 ><DL
    183 ><DT
    184 >1.6.1. <A
    185 HREF="x394.htm#AEN396"
    186 >Tuners</A
    187 ></DT
    188 ><DT
    189 >1.6.2. <A
    190 HREF="x394.htm#AEN418"
    191 >Modulators</A
    192 ></DT
    193 ><DT
    194 >1.6.3. <A
    195 HREF="x394.htm#AEN437"
    196 >Radio Frequency</A
    197 ></DT
    198 ><DT
    199 >1.6.4. <A
    200 HREF="x394.htm#AEN445"
    201 >Satellite Receivers</A
    202 ></DT
    203 ></DL
    204 ></DD
    205 ><DT
    206 >1.7. <A
    207 HREF="x448.htm"
    208 >Video Standards</A
    209 ></DT
    210 ><DT
    211 >1.8. <A
    212 HREF="x542.htm"
    213 >User Controls</A
    214 ></DT
    215 ><DT
    216 >1.9. <A
    217 HREF="x802.htm"
    218 >Extended Controls</A
    219 ></DT
    220 ><DD
    221 ><DL
    222 ><DT
    223 >1.9.1. <A
    224 HREF="x802.htm#AEN804"
    225 >Introduction</A
    226 ></DT
    227 ><DT
    228 >1.9.2. <A
    229 HREF="x802.htm#AEN809"
    230 >The Extended Control API</A
    231 ></DT
    232 ><DT
    233 >1.9.3. <A
    234 HREF="x802.htm#AEN840"
    235 >Enumerating Extended Controls</A
    236 ></DT
    237 ><DT
    238 >1.9.4. <A
    239 HREF="x802.htm#AEN867"
    240 >Creating Control Panels</A
    241 ></DT
    242 ><DT
    243 >1.9.5. <A
    244 HREF="x802.htm#MPEG-CONTROLS"
    245 >MPEG Control Reference</A
    246 ></DT
    247 ><DT
    248 >1.9.6. <A
    249 HREF="x802.htm#CAMERA-CONTROLS"
    250 >Camera Control Reference</A
    251 ></DT
    252 ></DL
    253 ></DD
    254 ><DT
    255 >1.10. <A
    256 HREF="x1859.htm"
    257 >Data Formats</A
    258 ></DT
    259 ><DD
    260 ><DL
    261 ><DT
    262 >1.10.1. <A
    263 HREF="x1859.htm#AEN1861"
    264 >Data Format Negotiation</A
    265 ></DT
    266 ><DT
    267 >1.10.2. <A
    268 HREF="x1859.htm#AEN1894"
    269 >Image Format Enumeration</A
    270 ></DT
    271 ></DL
    272 ></DD
    273 ><DT
    274 >1.11. <A
    275 HREF="x1904.htm"
    276 >Image Cropping, Insertion and Scaling</A
    277 ></DT
    278 ><DD
    279 ><DL
    280 ><DT
    281 >1.11.1. <A
    282 HREF="x1904.htm#AEN1926"
    283 >Cropping Structures</A
    284 ></DT
    285 ><DT
    286 >1.11.2. <A
    287 HREF="x1904.htm#AEN1954"
    288 >Scaling Adjustments</A
    289 ></DT
    290 ><DT
    291 >1.11.3. <A
    292 HREF="x1904.htm#AEN1969"
    293 >Examples</A
    294 ></DT
    295 ></DL
    296 ></DD
    297 ><DT
    298 >1.12. <A
    299 HREF="x2009.htm"
    300 >Streaming Parameters</A
    301 ></DT
    302 ></DL
    303 ></DD
    304 ><DT
    305 >2. <A
    306 HREF="c2030.htm"
    307 >Image Formats</A
    308 ></DT
    309 ><DD
    310 ><DL
    311 ><DT
    312 >2.1. <A
    313 HREF="c2030.htm#AEN2113"
    314 >Standard Image Formats</A
    315 ></DT
    316 ><DT
    317 >2.2. <A
    318 HREF="x2123.htm"
    319 >Colorspaces</A
    320 ></DT
    321 ><DT
    322 >2.3. <A
    323 HREF="x2428.htm"
    324 >Indexed Format</A
    325 ></DT
    326 ><DT
    327 >2.4. <A
    328 HREF="x2490.htm"
    329 >RGB Formats</A
    330 ></DT
    331 ><DD
    332 ><DL
    333 ><DT
    334 ><A
    335 HREF="r2492.htm"
    336 >Packed RGB formats</A
    337 >&nbsp;--&nbsp;Packed RGB formats</DT
    338 ><DT
    339 ><A
    340 HREF="r3735.htm"
    341 >V4L2_PIX_FMT_SBGGR8 ('BA81')</A
    342 >&nbsp;--&nbsp;Bayer RGB format</DT
    343 ><DT
    344 ><A
    345 HREF="r3796.htm"
    346 >V4L2_PIX_FMT_SBGGR16 ('BA82')</A
    347 >&nbsp;--&nbsp;Bayer RGB format</DT
    348 ></DL
    349 ></DD
    350 ><DT
    351 >2.5. <A
    352 HREF="x3891.htm"
    353 >YUV Formats</A
    354 ></DT
    355 ><DD
    356 ><DL
    357 ><DT
    358 ><A
    359 HREF="r3896.htm"
    360 >Packed YUV formats</A
    361 >&nbsp;--&nbsp;Packed YUV formats</DT
    362 ><DT
    363 ><A
    364 HREF="r4185.htm"
    365 >V4L2_PIX_FMT_GREY ('GREY')</A
    366 >&nbsp;--&nbsp;Grey-scale image</DT
    367 ><DT
    368 ><A
    369 HREF="r4246.htm"
    370 >V4L2_PIX_FMT_Y16 ('Y16 ')</A
    371 >&nbsp;--&nbsp;Grey-scale image</DT
    372 ><DT
    373 ><A
    374 HREF="r4339.htm"
    375 >V4L2_PIX_FMT_YUYV ('YUYV')</A
    376 >&nbsp;--&nbsp;Packed format with &frac12; horizontal chroma
    377 resolution, also known as YUV 4:2:2</DT
    378 ><DT
    379 ><A
    380 HREF="r4484.htm"
    381 >V4L2_PIX_FMT_UYVY ('UYVY')</A
    382 >&nbsp;--&nbsp;Variation of
    383 <CODE
    384 CLASS="CONSTANT"
    385 >V4L2_PIX_FMT_YUYV</CODE
    386 > with different order of samples
    387 in memory</DT
    388 ><DT
    389 ><A
    390 HREF="r4629.htm"
    391 >V4L2_PIX_FMT_Y41P ('Y41P')</A
    392 >&nbsp;--&nbsp;Format with &frac14; horizontal chroma
    393 resolution, also known as YUV 4:1:1</DT
    394 ><DT
    395 ><A
    396 HREF="r4850.htm"
    397 >V4L2_PIX_FMT_YVU420 ('YV12'), V4L2_PIX_FMT_YUV420 ('YU12')</A
    398 >&nbsp;--&nbsp;Planar formats with &frac12; horizontal and
    399 vertical chroma resolution, also known as YUV 4:2:0</DT
    400 ><DT
    401 ><A
    402 HREF="r5016.htm"
    403 >V4L2_PIX_FMT_YVU410 ('YVU9'), V4L2_PIX_FMT_YUV410 ('YUV9')</A
    404 >&nbsp;--&nbsp;Planar formats with &frac14; horizontal and
    405 vertical chroma resolution, also known as YUV 4:1:0</DT
    406 ><DT
    407 ><A
    408 HREF="r5154.htm"
    409 >V4L2_PIX_FMT_YUV422P ('422P')</A
    410 >&nbsp;--&nbsp;Format with &frac12; horizontal chroma resolution,
    411 also known as YUV 4:2:2. Planar layout as opposed to
    412 <CODE
    413 CLASS="CONSTANT"
    414 >V4L2_PIX_FMT_YUYV</CODE
    415 ></DT
    416 ><DT
    417 ><A
    418 HREF="r5319.htm"
    419 >V4L2_PIX_FMT_YUV411P ('411P')</A
    420 >&nbsp;--&nbsp;Format with &frac14; horizontal chroma resolution,
    421 also known as YUV 4:1:1. Planar layout as opposed to
    422 <CODE
    423 CLASS="CONSTANT"
    424 >V4L2_PIX_FMT_Y41P</CODE
    425 ></DT
    426 ><DT
    427 ><A
    428 HREF="r5470.htm"
    429 >V4L2_PIX_FMT_NV12 ('NV12'), V4L2_PIX_FMT_NV21 ('NV21')</A
    430 >&nbsp;--&nbsp;Formats with &frac12; horizontal and vertical
    431 chroma resolution, also known as YUV 4:2:0. One luminance and one
    432 chrominance plane with alternating chroma samples as opposed to
    433 <CODE
    434 CLASS="CONSTANT"
    435 >V4L2_PIX_FMT_YVU420</CODE
    436 ></DT
    437 ></DL
    438 ></DD
    439 ><DT
    440 >2.6. <A
    441 HREF="x5634.htm"
    442 >Compressed Formats</A
    443 ></DT
    444 ><DT
    445 >2.7. <A
    446 HREF="x5665.htm"
    447 >Reserved Format Identifiers</A
    448 ></DT
    449 ></DL
    450 ></DD
    451 ><DT
    452 >3. <A
    453 HREF="c5742.htm"
    454 >Input/Output</A
    455 ></DT
    456 ><DD
    457 ><DL
    458 ><DT
    459 >3.1. <A
    460 HREF="c5742.htm#RW"
    461 >Read/Write</A
    462 ></DT
    463 ><DT
    464 >3.2. <A
    465 HREF="x5791.htm"
    466 >Streaming I/O (Memory Mapping)</A
    467 ></DT
    468 ><DT
    469 >3.3. <A
    470 HREF="x5884.htm"
    471 >Streaming I/O (User Pointers)</A
    472 ></DT
    473 ><DT
    474 >3.4. <A
    475 HREF="x5950.htm"
    476 >Asynchronous I/O</A
    477 ></DT
    478 ><DT
    479 >3.5. <A
    480 HREF="x5953.htm"
    481 >Buffers</A
    482 ></DT
    483 ><DD
    484 ><DL
    485 ><DT
    486 >3.5.1. <A
    487 HREF="x5953.htm#AEN6266"
    488 >Timecodes</A
    489 ></DT
    490 ></DL
    491 ></DD
    492 ><DT
    493 >3.6. <A
    494 HREF="x6386.htm"
    495 >Field Order</A
    496 ></DT
    497 ></DL
    498 ></DD
    499 ><DT
    500 >4. <A
    501 HREF="c6488.htm"
    502 >Interfaces</A
    503 ></DT
    504 ><DD
    505 ><DL
    506 ><DT
    507 >4.1. <A
    508 HREF="c6488.htm#CAPTURE"
    509 >Video Capture Interface</A
    510 ></DT
    511 ><DD
    512 ><DL
    513 ><DT
    514 >4.1.1. <A
    515 HREF="c6488.htm#AEN6498"
    516 >Querying Capabilities</A
    517 ></DT
    518 ><DT
    519 >4.1.2. <A
    520 HREF="c6488.htm#AEN6510"
    521 >Supplemental Functions</A
    522 ></DT
    523 ><DT
    524 >4.1.3. <A
    525 HREF="c6488.htm#AEN6520"
    526 >Image Format Negotiation</A
    527 ></DT
    528 ><DT
    529 >4.1.4. <A
    530 HREF="c6488.htm#AEN6563"
    531 >Reading Images</A
    532 ></DT
    533 ></DL
    534 ></DD
    535 ><DT
    536 >4.2. <A
    537 HREF="x6570.htm"
    538 >Video Overlay Interface</A
    539 ></DT
    540 ><DD
    541 ><DL
    542 ><DT
    543 >4.2.1. <A
    544 HREF="x6570.htm#AEN6587"
    545 >Querying Capabilities</A
    546 ></DT
    547 ><DT
    548 >4.2.2. <A
    549 HREF="x6570.htm#AEN6595"
    550 >Supplemental Functions</A
    551 ></DT
    552 ><DT
    553 >4.2.3. <A
    554 HREF="x6570.htm#AEN6605"
    555 >Setup</A
    556 ></DT
    557 ><DT
    558 >4.2.4. <A
    559 HREF="x6570.htm#AEN6635"
    560 >Overlay Window</A
    561 ></DT
    562 ><DT
    563 >4.2.5. <A
    564 HREF="x6570.htm#AEN6826"
    565 >Enabling Overlay</A
    566 ></DT
    567 ></DL
    568 ></DD
    569 ><DT
    570 >4.3. <A
    571 HREF="x6831.htm"
    572 >Video Output Interface</A
    573 ></DT
    574 ><DD
    575 ><DL
    576 ><DT
    577 >4.3.1. <A
    578 HREF="x6831.htm#AEN6839"
    579 >Querying Capabilities</A
    580 ></DT
    581 ><DT
    582 >4.3.2. <A
    583 HREF="x6831.htm#AEN6849"
    584 >Supplemental Functions</A
    585 ></DT
    586 ><DT
    587 >4.3.3. <A
    588 HREF="x6831.htm#AEN6859"
    589 >Image Format Negotiation</A
    590 ></DT
    591 ><DT
    592 >4.3.4. <A
    593 HREF="x6831.htm#AEN6902"
    594 >Writing Images</A
    595 ></DT
    596 ></DL
    597 ></DD
    598 ><DT
    599 >4.4. <A
    600 HREF="x6909.htm"
    601 >Video Output Overlay Interface</A
    602 ></DT
    603 ><DD
    604 ><DL
    605 ><DT
    606 >4.4.1. <A
    607 HREF="x6909.htm#AEN6923"
    608 >Querying Capabilities</A
    609 ></DT
    610 ><DT
    611 >4.4.2. <A
    612 HREF="x6909.htm#AEN6932"
    613 >Framebuffer</A
    614 ></DT
    615 ><DT
    616 >4.4.3. <A
    617 HREF="x6909.htm#AEN6953"
    618 >Overlay Window and Scaling</A
    619 ></DT
    620 ><DT
    621 >4.4.4. <A
    622 HREF="x6909.htm#AEN6987"
    623 >Enabling Overlay</A
    624 ></DT
    625 ></DL
    626 ></DD
    627 ><DT
    628 >4.5. <A
    629 HREF="x6991.htm"
    630 >Codec Interface</A
    631 ></DT
    632 ><DT
    633 >4.6. <A
    634 HREF="x7002.htm"
    635 >Effect Devices Interface</A
    636 ></DT
    637 ><DT
    638 >4.7. <A
    639 HREF="x7013.htm"
    640 >Raw VBI Data Interface</A
    641 ></DT
    642 ><DD
    643 ><DL
    644 ><DT
    645 >4.7.1. <A
    646 HREF="x7013.htm#AEN7029"
    647 >Querying Capabilities</A
    648 ></DT
    649 ><DT
    650 >4.7.2. <A
    651 HREF="x7013.htm#AEN7038"
    652 >Supplemental Functions</A
    653 ></DT
    654 ><DT
    655 >4.7.3. <A
    656 HREF="x7013.htm#AEN7045"
    657 >Raw VBI Format Negotiation</A
    658 ></DT
    659 ><DT
    660 >4.7.4. <A
    661 HREF="x7013.htm#AEN7218"
    662 >Reading and writing VBI images</A
    663 ></DT
    664 ></DL
    665 ></DD
    666 ><DT
    667 >4.8. <A
    668 HREF="x7236.htm"
    669 >Sliced VBI Data Interface</A
    670 ></DT
    671 ><DD
    672 ><DL
    673 ><DT
    674 >4.8.1. <A
    675 HREF="x7236.htm#AEN7248"
    676 >Querying Capabilities</A
    677 ></DT
    678 ><DT
    679 >4.8.2. <A
    680 HREF="x7236.htm#AEN7258"
    681 >Supplemental Functions</A
    682 ></DT
    683 ><DT
    684 >4.8.3. <A
    685 HREF="x7236.htm#AEN7265"
    686 >Sliced VBI Format Negotiation</A
    687 ></DT
    688 ><DT
    689 >4.8.4. <A
    690 HREF="x7236.htm#AEN7483"
    691 >Reading and writing sliced VBI data</A
    692 ></DT
    693 ></DL
    694 ></DD
    695 ><DT
    696 >4.9. <A
    697 HREF="x7561.htm"
    698 >Teletext Interface</A
    699 ></DT
    700 ><DT
    701 >4.10. <A
    702 HREF="x7578.htm"
    703 >Radio Interface</A
    704 ></DT
    705 ><DD
    706 ><DL
    707 ><DT
    708 >4.10.1. <A
    709 HREF="x7578.htm#AEN7585"
    710 >Querying Capabilities</A
    711 ></DT
    712 ><DT
    713 >4.10.2. <A
    714 HREF="x7578.htm#AEN7594"
    715 >Supplemental Functions</A
    716 ></DT
    717 ><DT
    718 >4.10.3. <A
    719 HREF="x7578.htm#AEN7600"
    720 >Programming</A
    721 ></DT
    722 ></DL
    723 ></DD
    724 ><DT
    725 >4.11. <A
    726 HREF="x7607.htm"
    727 >RDS Interface</A
    728 ></DT
    729 ></DL
    730 ></DD
    731 ><DT
    732 >I. <A
    733 HREF="r7624.htm"
    734 >Function Reference</A
    735 ></DT
    736 ><DD
    737 ><DL
    738 ><DT
    739 ><A
    740 HREF="r7626.htm"
    741 >V4L2 close()</A
    742 >&nbsp;--&nbsp;Close a V4L2 device</DT
    743 ><DT
    744 ><A
    745 HREF="r7667.htm"
    746 >V4L2 ioctl()</A
    747 >&nbsp;--&nbsp;Program a V4L2 device</DT
    748 ><DT
    749 ><A
    750 HREF="r7771.htm"
    751 >ioctl VIDIOC_CROPCAP</A
    752 >&nbsp;--&nbsp;Information about the video cropping and scaling abilities</DT
    753 ><DT
    754 ><A
    755 HREF="r7900.htm"
    756 >ioctl VIDIOC_DBG_G_REGISTER, VIDIOC_DBG_S_REGISTER</A
    757 >&nbsp;--&nbsp;Read or write hardware registers</DT
    758 ><DT
    759 ><A
    760 HREF="r8087.htm"
    761 >ioctl VIDIOC_ENCODER_CMD, VIDIOC_TRY_ENCODER_CMD</A
    762 >&nbsp;--&nbsp;Execute an encoder command</DT
    763 ><DT
    764 ><A
    765 HREF="r8242.htm"
    766 >ioctl VIDIOC_ENUMAUDIO</A
    767 >&nbsp;--&nbsp;Enumerate audio inputs</DT
    768 ><DT
    769 ><A
    770 HREF="r8304.htm"
    771 >ioctl VIDIOC_ENUMAUDOUT</A
    772 >&nbsp;--&nbsp;Enumerate audio outputs</DT
    773 ><DT
    774 ><A
    775 HREF="r8367.htm"
    776 >ioctl VIDIOC_ENUM_FMT</A
    777 >&nbsp;--&nbsp;Enumerate image formats</DT
    778 ><DT
    779 ><A
    780 HREF="r8494.htm"
    781 >ioctl VIDIOC_ENUM_FRAMESIZES</A
    782 >&nbsp;--&nbsp;Enumerate frame sizes</DT
    783 ><DT
    784 ><A
    785 HREF="r8724.htm"
    786 >ioctl VIDIOC_ENUM_FRAMEINTERVALS</A
    787 >&nbsp;--&nbsp;Enumerate frame intervals</DT
    788 ><DT
    789 ><A
    790 HREF="r8936.htm"
    791 >ioctl VIDIOC_ENUMINPUT</A
    792 >&nbsp;--&nbsp;Enumerate video inputs</DT
    793 ><DT
    794 ><A
    795 HREF="r9149.htm"
    796 >ioctl VIDIOC_ENUMOUTPUT</A
    797 >&nbsp;--&nbsp;Enumerate video outputs</DT
    798 ><DT
    799 ><A
    800 HREF="r9288.htm"
    801 >ioctl VIDIOC_ENUMSTD</A
    802 >&nbsp;--&nbsp;Enumerate supported video standards</DT
    803 ><DT
    804 ><A
    805 HREF="r9539.htm"
    806 >ioctl VIDIOC_G_AUDIO, VIDIOC_S_AUDIO</A
    807 >&nbsp;--&nbsp;Query or select the current audio input and its
    808 attributes</DT
    809 ><DT
    810 ><A
    811 HREF="r9688.htm"
    812 >ioctl VIDIOC_G_AUDOUT, VIDIOC_S_AUDOUT</A
    813 >&nbsp;--&nbsp;Query or select the current audio output</DT
    814 ><DT
    815 ><A
    816 HREF="r9804.htm"
    817 >ioctl VIDIOC_G_CHIP_IDENT</A
    818 >&nbsp;--&nbsp;Identify the chips on a TV card</DT
    819 ><DT
    820 ><A
    821 HREF="r9994.htm"
    822 >ioctl VIDIOC_G_CROP, VIDIOC_S_CROP</A
    823 >&nbsp;--&nbsp;Get or set the current cropping rectangle</DT
    824 ><DT
    825 ><A
    826 HREF="r10104.htm"
    827 >ioctl VIDIOC_G_CTRL, VIDIOC_S_CTRL</A
    828 >&nbsp;--&nbsp;Get or set the value of a control</DT
    829 ><DT
    830 ><A
    831 HREF="r10211.htm"
    832 >ioctl VIDIOC_G_ENC_INDEX</A
    833 >&nbsp;--&nbsp;Get meta data about a compressed video stream</DT
    834 ><DT
    835 ><A
    836 HREF="r10386.htm"
    837 >ioctl VIDIOC_G_EXT_CTRLS, VIDIOC_S_EXT_CTRLS,
    838 VIDIOC_TRY_EXT_CTRLS</A
    839 >&nbsp;--&nbsp;Get or set the value of several controls, try control
    840 values</DT
    841 ><DT
    842 ><A
    843 HREF="r10595.htm"
    844 >ioctl VIDIOC_G_FBUF, VIDIOC_S_FBUF</A
    845 >&nbsp;--&nbsp;Get or set frame buffer overlay parameters</DT
    846 ><DT
    847 ><A
    848 HREF="r10944.htm"
    849 >ioctl VIDIOC_G_FMT, VIDIOC_S_FMT,
    850 VIDIOC_TRY_FMT</A
    851 >&nbsp;--&nbsp;Get or set the data format, try a format</DT
    852 ><DT
    853 ><A
    854 HREF="r11094.htm"
    855 >ioctl VIDIOC_G_FREQUENCY, VIDIOC_S_FREQUENCY</A
    856 >&nbsp;--&nbsp;Get or set tuner or modulator radio
    857 frequency</DT
    858 ><DT
    859 ><A
    860 HREF="r11217.htm"
    861 >ioctl VIDIOC_G_INPUT, VIDIOC_S_INPUT</A
    862 >&nbsp;--&nbsp;Query or select the current video input</DT
    863 ><DT
    864 ><A
    865 HREF="r11285.htm"
    866 >ioctl VIDIOC_G_JPEGCOMP, VIDIOC_S_JPEGCOMP</A
    867 >&nbsp;--&nbsp;</DT
    868 ><DT
    869 ><A
    870 HREF="r11430.htm"
    871 >ioctl VIDIOC_G_MODULATOR, VIDIOC_S_MODULATOR</A
    872 >&nbsp;--&nbsp;Get or set modulator attributes</DT
    873 ><DT
    874 ><A
    875 HREF="r11612.htm"
    876 >ioctl VIDIOC_G_OUTPUT, VIDIOC_S_OUTPUT</A
    877 >&nbsp;--&nbsp;Query or select the current video output</DT
    878 ><DT
    879 ><A
    880 HREF="r11680.htm"
    881 >ioctl VIDIOC_G_PARM, VIDIOC_S_PARM</A
    882 >&nbsp;--&nbsp;Get or set streaming parameters</DT
    883 ><DT
    884 ><A
    885 HREF="r11946.htm"
    886 >ioctl VIDIOC_G_PRIORITY, VIDIOC_S_PRIORITY</A
    887 >&nbsp;--&nbsp;Query or request the access priority associated with a
    888 file descriptor</DT
    889 ><DT
    890 ><A
    891 HREF="r12051.htm"
    892 >ioctl VIDIOC_G_SLICED_VBI_CAP</A
    893 >&nbsp;--&nbsp;Query sliced VBI capabilities</DT
    894 ><DT
    895 ><A
    896 HREF="r12265.htm"
    897 >ioctl VIDIOC_G_STD, VIDIOC_S_STD</A
    898 >&nbsp;--&nbsp;Query or select the video standard of the current input</DT
    899 ><DT
    900 ><A
    901 HREF="r12342.htm"
    902 >ioctl VIDIOC_G_TUNER, VIDIOC_S_TUNER</A
    903 >&nbsp;--&nbsp;Get or set tuner attributes</DT
    904 ><DT
    905 ><A
    906 HREF="r12784.htm"
    907 >ioctl VIDIOC_LOG_STATUS</A
    908 >&nbsp;--&nbsp;Log driver status information</DT
    909 ><DT
    910 ><A
    911 HREF="r12816.htm"
    912 >ioctl VIDIOC_OVERLAY</A
    913 >&nbsp;--&nbsp;Start or stop video overlay</DT
    914 ><DT
    915 ><A
    916 HREF="r12878.htm"
    917 >ioctl VIDIOC_QBUF, VIDIOC_DQBUF</A
    918 >&nbsp;--&nbsp;Exchange a buffer with the driver</DT
    919 ><DT
    920 ><A
    921 HREF="r13022.htm"
    922 >ioctl VIDIOC_QUERYBUF</A
    923 >&nbsp;--&nbsp;Query the status of a buffer</DT
    924 ><DT
    925 ><A
    926 HREF="r13105.htm"
    927 >ioctl VIDIOC_QUERYCAP</A
    928 >&nbsp;--&nbsp;Query device capabilities</DT
    929 ><DT
    930 ><A
    931 HREF="r13317.htm"
    932 >ioctl VIDIOC_QUERYCTRL, VIDIOC_QUERYMENU</A
    933 >&nbsp;--&nbsp;Enumerate controls and menu control items</DT
    934 ><DT
    935 ><A
    936 HREF="r13641.htm"
    937 >ioctl VIDIOC_QUERYSTD</A
    938 >&nbsp;--&nbsp;Sense the video standard received by the current
    939 input</DT
    940 ><DT
    941 ><A
    942 HREF="r13696.htm"
    943 >ioctl VIDIOC_REQBUFS</A
    944 >&nbsp;--&nbsp;Initiate Memory Mapping or User Pointer I/O</DT
    945 ><DT
    946 ><A
    947 HREF="r13817.htm"
    948 >ioctl VIDIOC_STREAMON, VIDIOC_STREAMOFF</A
    949 >&nbsp;--&nbsp;Start or stop streaming I/O</DT
    950 ><DT
    951 ><A
    952 HREF="r13889.htm"
    953 >V4L2 mmap()</A
    954 >&nbsp;--&nbsp;Map device memory into application address space</DT
    955 ><DT
    956 ><A
    957 HREF="r14037.htm"
    958 >V4L2 munmap()</A
    959 >&nbsp;--&nbsp;Unmap device memory</DT
    960 ><DT
    961 ><A
    962 HREF="r14090.htm"
    963 >V4L2 open()</A
    964 >&nbsp;--&nbsp;Open a V4L2 device</DT
    965 ><DT
    966 ><A
    967 HREF="r14169.htm"
    968 >V4L2 poll()</A
    969 >&nbsp;--&nbsp;Wait for some event on a file descriptor</DT
    970 ><DT
    971 ><A
    972 HREF="r14264.htm"
    973 >V4L2 read()</A
    974 >&nbsp;--&nbsp;Read from a V4L2 device</DT
    975 ><DT
    976 ><A
    977 HREF="r14390.htm"
    978 >V4L2 select()</A
    979 >&nbsp;--&nbsp;Synchronous I/O multiplexing</DT
    980 ><DT
    981 ><A
    982 HREF="r14496.htm"
    983 >V4L2 write()</A
    984 >&nbsp;--&nbsp;Write to a V4L2 device</DT
    985 ></DL
    986 ></DD
    987 ><DT
    988 >5. <A
    989 HREF="c14592.htm"
    990 >V4L2 Driver Programming</A
    991 ></DT
    992 ><DT
    993 >6. <A
    994 HREF="c14595.htm"
    995 >Changes</A
    996 ></DT
    997 ><DD
    998 ><DL
    999 ><DT
   1000 >6.1. <A
   1001 HREF="c14595.htm#DIFF-V4L"
   1002 >Differences between V4L and V4L2</A
   1003 ></DT
   1004 ><DD
   1005 ><DL
   1006 ><DT
   1007 >6.1.1. <A
   1008 HREF="c14595.htm#AEN14602"
   1009 >Opening and Closing Devices</A
   1010 ></DT
   1011 ><DT
   1012 >6.1.2. <A
   1013 HREF="c14595.htm#AEN14665"
   1014 >Querying Capabilities</A
   1015 ></DT
   1016 ><DT
   1017 >6.1.3. <A
   1018 HREF="c14595.htm#AEN14821"
   1019 >Video Sources</A
   1020 ></DT
   1021 ><DT
   1022 >6.1.4. <A
   1023 HREF="c14595.htm#AEN14877"
   1024 >Tuning</A
   1025 ></DT
   1026 ><DT
   1027 >6.1.5. <A
   1028 HREF="c14595.htm#V4L-IMAGE-PROPERTIES"
   1029 >Image Properties</A
   1030 ></DT
   1031 ><DT
   1032 >6.1.6. <A
   1033 HREF="c14595.htm#AEN15120"
   1034 >Audio</A
   1035 ></DT
   1036 ><DT
   1037 >6.1.7. <A
   1038 HREF="c14595.htm#AEN15205"
   1039 >Frame Buffer Overlay</A
   1040 ></DT
   1041 ><DT
   1042 >6.1.8. <A
   1043 HREF="c14595.htm#AEN15269"
   1044 >Cropping</A
   1045 ></DT
   1046 ><DT
   1047 >6.1.9. <A
   1048 HREF="c14595.htm#AEN15302"
   1049 >Reading Images, Memory Mapping</A
   1050 ></DT
   1051 ><DT
   1052 >6.1.10. <A
   1053 HREF="c14595.htm#AEN15385"
   1054 >Reading Raw VBI Data</A
   1055 ></DT
   1056 ><DT
   1057 >6.1.11. <A
   1058 HREF="c14595.htm#AEN15438"
   1059 >Miscellaneous</A
   1060 ></DT
   1061 ></DL
   1062 ></DD
   1063 ><DT
   1064 >6.2. <A
   1065 HREF="x15446.htm"
   1066 >Changes of the V4L2 API</A
   1067 ></DT
   1068 ><DD
   1069 ><DL
   1070 ><DT
   1071 >6.2.1. <A
   1072 HREF="x15446.htm#AEN15449"
   1073 >Early Versions</A
   1074 ></DT
   1075 ><DT
   1076 >6.2.2. <A
   1077 HREF="x15446.htm#AEN15499"
   1078 >V4L2 Version 0.16 1999-01-31</A
   1079 ></DT
   1080 ><DT
   1081 >6.2.3. <A
   1082 HREF="x15446.htm#AEN15502"
   1083 >V4L2 Version 0.18 1999-03-16</A
   1084 ></DT
   1085 ><DT
   1086 >6.2.4. <A
   1087 HREF="x15446.htm#AEN15505"
   1088 >V4L2 Version 0.19 1999-06-05</A
   1089 ></DT
   1090 ><DT
   1091 >6.2.5. <A
   1092 HREF="x15446.htm#AEN15514"
   1093 >V4L2 Version 0.20 (1999-09-10)</A
   1094 ></DT
   1095 ><DT
   1096 >6.2.6. <A
   1097 HREF="x15446.htm#AEN15575"
   1098 >V4L2 Version 0.20 incremental changes</A
   1099 ></DT
   1100 ><DT
   1101 >6.2.7. <A
   1102 HREF="x15446.htm#AEN15628"
   1103 >V4L2 Version 0.20 2000-11-23</A
   1104 ></DT
   1105 ><DT
   1106 >6.2.8. <A
   1107 HREF="x15446.htm#AEN15657"
   1108 >V4L2 Version 0.20 2002-07-25</A
   1109 ></DT
   1110 ><DT
   1111 >6.2.9. <A
   1112 HREF="x15446.htm#AEN15660"
   1113 >V4L2 in Linux 2.5.46, 2002-10</A
   1114 ></DT
   1115 ><DT
   1116 >6.2.10. <A
   1117 HREF="x15446.htm#AEN16046"
   1118 >V4L2 2003-06-19</A
   1119 ></DT
   1120 ><DT
   1121 >6.2.11. <A
   1122 HREF="x15446.htm#AEN16089"
   1123 >V4L2 2003-11-05</A
   1124 ></DT
   1125 ><DT
   1126 >6.2.12. <A
   1127 HREF="x15446.htm#AEN16131"
   1128 >V4L2 in Linux 2.6.6, 2004-05-09</A
   1129 ></DT
   1130 ><DT
   1131 >6.2.13. <A
   1132 HREF="x15446.htm#AEN16139"
   1133 >V4L2 in Linux 2.6.8</A
   1134 ></DT
   1135 ><DT
   1136 >6.2.14. <A
   1137 HREF="x15446.htm#AEN16149"
   1138 >V4L2 spec erratum 2004-08-01</A
   1139 ></DT
   1140 ><DT
   1141 >6.2.15. <A
   1142 HREF="x15446.htm#AEN16170"
   1143 >V4L2 in Linux 2.6.14</A
   1144 ></DT
   1145 ><DT
   1146 >6.2.16. <A
   1147 HREF="x15446.htm#AEN16176"
   1148 >V4L2 in Linux 2.6.15</A
   1149 ></DT
   1150 ><DT
   1151 >6.2.17. <A
   1152 HREF="x15446.htm#AEN16203"
   1153 >V4L2 spec erratum 2005-11-27</A
   1154 ></DT
   1155 ><DT
   1156 >6.2.18. <A
   1157 HREF="x15446.htm#AEN16212"
   1158 >V4L2 spec erratum 2006-01-10</A
   1159 ></DT
   1160 ><DT
   1161 >6.2.19. <A
   1162 HREF="x15446.htm#AEN16223"
   1163 >V4L2 spec erratum 2006-02-03</A
   1164 ></DT
   1165 ><DT
   1166 >6.2.20. <A
   1167 HREF="x15446.htm#AEN16231"
   1168 >V4L2 spec erratum 2006-02-04</A
   1169 ></DT
   1170 ><DT
   1171 >6.2.21. <A
   1172 HREF="x15446.htm#AEN16241"
   1173 >V4L2 in Linux 2.6.17</A
   1174 ></DT
   1175 ><DT
   1176 >6.2.22. <A
   1177 HREF="x15446.htm#AEN16261"
   1178 >V4L2 spec erratum 2006-09-23 (Draft 0.15)</A
   1179 ></DT
   1180 ><DT
   1181 >6.2.23. <A
   1182 HREF="x15446.htm#AEN16297"
   1183 >V4L2 in Linux 2.6.18</A
   1184 ></DT
   1185 ><DT
   1186 >6.2.24. <A
   1187 HREF="x15446.htm#AEN16319"
   1188 >V4L2 in Linux 2.6.19</A
   1189 ></DT
   1190 ><DT
   1191 >6.2.25. <A
   1192 HREF="x15446.htm#AEN16338"
   1193 >V4L2 spec erratum 2006-10-12 (Draft 0.17)</A
   1194 ></DT
   1195 ><DT
   1196 >6.2.26. <A
   1197 HREF="x15446.htm#AEN16345"
   1198 >V4L2 in Linux 2.6.21</A
   1199 ></DT
   1200 ><DT
   1201 >6.2.27. <A
   1202 HREF="x15446.htm#AEN16351"
   1203 >V4L2 in Linux 2.6.22</A
   1204 ></DT
   1205 ><DT
   1206 >6.2.28. <A
   1207 HREF="x15446.htm#AEN16378"
   1208 >V4L2 in Linux 2.6.24</A
   1209 ></DT
   1210 ><DT
   1211 >6.2.29. <A
   1212 HREF="x15446.htm#AEN16388"
   1213 >V4L2 in Linux 2.6.25</A
   1214 ></DT
   1215 ></DL
   1216 ></DD
   1217 ><DT
   1218 >6.3. <A
   1219 HREF="x16430.htm"
   1220 >Relation of V4L2 to other Linux multimedia APIs</A
   1221 ></DT
   1222 ><DD
   1223 ><DL
   1224 ><DT
   1225 >6.3.1. <A
   1226 HREF="x16430.htm#XVIDEO"
   1227 >X Video Extension</A
   1228 ></DT
   1229 ><DT
   1230 >6.3.2. <A
   1231 HREF="x16430.htm#AEN16446"
   1232 >Digital Video</A
   1233 ></DT
   1234 ><DT
   1235 >6.3.3. <A
   1236 HREF="x16430.htm#AEN16450"
   1237 >Audio Interfaces</A
   1238 ></DT
   1239 ></DL
   1240 ></DD
   1241 ><DT
   1242 >6.4. <A
   1243 HREF="x16453.htm"
   1244 >Experimental API Elements</A
   1245 ></DT
   1246 ><DT
   1247 >6.5. <A
   1248 HREF="x16497.htm"
   1249 >Obsolete API Elements</A
   1250 ></DT
   1251 ></DL
   1252 ></DD
   1253 ><DT
   1254 >A. <A
   1255 HREF="a16506.htm"
   1256 >Video For Linux Two Header File</A
   1257 ></DT
   1258 ><DT
   1259 >B. <A
   1260 HREF="a16706.htm"
   1261 >Video Capture Example</A
   1262 ></DT
   1263 ><DT
   1264 >C. <A
   1265 HREF="a16721.htm"
   1266 >GNU Free Documentation License</A
   1267 ></DT
   1268 ><DD
   1269 ><DL
   1270 ><DT
   1271 >C.1. <A
   1272 HREF="a16721.htm#FDL-PREAMBLE"
   1273 >0. PREAMBLE</A
   1274 ></DT
   1275 ><DT
   1276 >C.2. <A
   1277 HREF="x16743.htm"
   1278 >1. APPLICABILITY AND DEFINITIONS</A
   1279 ></DT
   1280 ><DT
   1281 >C.3. <A
   1282 HREF="x16769.htm"
   1283 >2. VERBATIM COPYING</A
   1284 ></DT
   1285 ><DT
   1286 >C.4. <A
   1287 HREF="x16775.htm"
   1288 >3. COPYING IN QUANTITY</A
   1289 ></DT
   1290 ><DT
   1291 >C.5. <A
   1292 HREF="x16788.htm"
   1293 >4. MODIFICATIONS</A
   1294 ></DT
   1295 ><DT
   1296 >C.6. <A
   1297 HREF="x16896.htm"
   1298 >5. COMBINING DOCUMENTS</A
   1299 ></DT
   1300 ><DT
   1301 >C.7. <A
   1302 HREF="x16910.htm"
   1303 >6. COLLECTIONS OF DOCUMENTS</A
   1304 ></DT
   1305 ><DT
   1306 >C.8. <A
   1307 HREF="x16915.htm"
   1308 >7. AGGREGATION WITH INDEPENDENT WORKS</A
   1309 ></DT
   1310 ><DT
   1311 >C.9. <A
   1312 HREF="x16923.htm"
   1313 >8. TRANSLATION</A
   1314 ></DT
   1315 ><DT
   1316 >C.10. <A
   1317 HREF="x16929.htm"
   1318 >9. TERMINATION</A
   1319 ></DT
   1320 ><DT
   1321 >C.11. <A
   1322 HREF="x16933.htm"
   1323 >10. FUTURE REVISIONS OF THIS LICENSE</A
   1324 ></DT
   1325 ><DT
   1326 >C.12. <A
   1327 HREF="x16941.htm"
   1328 >Addendum</A
   1329 ></DT
   1330 ></DL
   1331 ></DD
   1332 ><DT
   1333 ><A
   1334 HREF="i16960.htm"
   1335 >List of Types</A
   1336 ></DT
   1337 ><DT
   1338 ><A
   1339 HREF="b17127.htm"
   1340 >References</A
   1341 ></DT
   1342 ></DL
   1343 ></DIV
   1344 ><DIV
   1345 CLASS="LOT"
   1346 ><DL
   1347 CLASS="LOT"
   1348 ><DT
   1349 ><B
   1350 >List of Figures</B
   1351 ></DT
   1352 ><DT
   1353 >1-1. <A
   1354 HREF="x1904.htm#CROP-SCALE"
   1355 >Image Cropping, Insertion and Scaling</A
   1356 ></DT
   1357 ><DT
   1358 >3-1. <A
   1359 HREF="x6386.htm#FIELDSEQ-TB"
   1360 >Field Order, Top Field First Transmitted</A
   1361 ></DT
   1362 ><DT
   1363 >3-2. <A
   1364 HREF="x6386.htm#FIELDSEQ-BT"
   1365 >Field Order, Bottom Field First Transmitted</A
   1366 ></DT
   1367 ><DT
   1368 >4-1. <A
   1369 HREF="x7013.htm#VBI-HSYNC"
   1370 >Line synchronization</A
   1371 ></DT
   1372 ><DT
   1373 >4-2. <A
   1374 HREF="x7013.htm#VBI-525"
   1375 >ITU-R 525 line numbering (M/NTSC and M/PAL)</A
   1376 ></DT
   1377 ><DT
   1378 >4-3. <A
   1379 HREF="x7013.htm#VBI-625"
   1380 >ITU-R 625 line numbering</A
   1381 ></DT
   1382 ></DL
   1383 ></DIV
   1384 ><DIV
   1385 CLASS="LOT"
   1386 ><DL
   1387 CLASS="LOT"
   1388 ><DT
   1389 ><B
   1390 >List of Examples</B
   1391 ></DT
   1392 ><DT
   1393 >1-1. <A
   1394 HREF="x309.htm#AEN328"
   1395 >Information about the current video input</A
   1396 ></DT
   1397 ><DT
   1398 >1-2. <A
   1399 HREF="x309.htm#AEN336"
   1400 >Switching to the first video input</A
   1401 ></DT
   1402 ><DT
   1403 >1-3. <A
   1404 HREF="x341.htm#AEN382"
   1405 >Information about the current audio input</A
   1406 ></DT
   1407 ><DT
   1408 >1-4. <A
   1409 HREF="x341.htm#AEN388"
   1410 >Switching to the first audio input</A
   1411 ></DT
   1412 ><DT
   1413 >1-5. <A
   1414 HREF="x448.htm#AEN510"
   1415 >Information about the current video standard</A
   1416 ></DT
   1417 ><DT
   1418 >1-6. <A
   1419 HREF="x448.htm#AEN519"
   1420 >Listing the video standards supported by the current
   1421 input</A
   1422 ></DT
   1423 ><DT
   1424 >1-7. <A
   1425 HREF="x448.htm#AEN530"
   1426 >Selecting a new video standard</A
   1427 ></DT
   1428 ><DT
   1429 >1-8. <A
   1430 HREF="x542.htm#AEN778"
   1431 >Enumerating all controls</A
   1432 ></DT
   1433 ><DT
   1434 >1-9. <A
   1435 HREF="x542.htm#AEN789"
   1436 >Changing controls</A
   1437 ></DT
   1438 ><DT
   1439 >1-10. <A
   1440 HREF="x1904.htm#AEN1972"
   1441 >Resetting the cropping parameters</A
   1442 ></DT
   1443 ><DT
   1444 >1-11. <A
   1445 HREF="x1904.htm#AEN1983"
   1446 >Simple downscaling</A
   1447 ></DT
   1448 ><DT
   1449 >1-12. <A
   1450 HREF="x1904.htm#AEN1991"
   1451 >Selecting an output area</A
   1452 ></DT
   1453 ><DT
   1454 >1-13. <A
   1455 HREF="x1904.htm#AEN1996"
   1456 >Current scaling factor and pixel aspect</A
   1457 ></DT
   1458 ><DT
   1459 >2-1. <A
   1460 HREF="x2123.htm#AEN2217"
   1461 >ITU-R Rec. BT.601 color conversion</A
   1462 ></DT
   1463 ><DT
   1464 >2-1. <A
   1465 HREF="r2492.htm#AEN3061"
   1466 ><CODE
   1467 CLASS="CONSTANT"
   1468 >V4L2_PIX_FMT_BGR24</CODE
   1469 > 4 &times; 4 pixel
   1470 image</A
   1471 ></DT
   1472 ><DT
   1473 >2-1. <A
   1474 HREF="r3735.htm#AEN3746"
   1475 ><CODE
   1476 CLASS="CONSTANT"
   1477 >V4L2_PIX_FMT_SBGGR8</CODE
   1478 > 4 &times; 4
   1479 pixel image</A
   1480 ></DT
   1481 ><DT
   1482 >2-1. <A
   1483 HREF="r3796.htm#AEN3809"
   1484 ><CODE
   1485 CLASS="CONSTANT"
   1486 >V4L2_PIX_FMT_SBGGR16</CODE
   1487 > 4 &times; 4
   1488 pixel image</A
   1489 ></DT
   1490 ><DT
   1491 >2-1. <A
   1492 HREF="r4185.htm#AEN4196"
   1493 ><CODE
   1494 CLASS="CONSTANT"
   1495 >V4L2_PIX_FMT_GREY</CODE
   1496 > 4 &times; 4
   1497 pixel image</A
   1498 ></DT
   1499 ><DT
   1500 >2-1. <A
   1501 HREF="r4246.htm#AEN4257"
   1502 ><CODE
   1503 CLASS="CONSTANT"
   1504 >V4L2_PIX_FMT_Y16</CODE
   1505 > 4 &times; 4
   1506 pixel image</A
   1507 ></DT
   1508 ><DT
   1509 >2-1. <A
   1510 HREF="r4339.htm#AEN4351"
   1511 ><CODE
   1512 CLASS="CONSTANT"
   1513 >V4L2_PIX_FMT_YUYV</CODE
   1514 > 4 &times; 4
   1515 pixel image</A
   1516 ></DT
   1517 ><DT
   1518 >2-1. <A
   1519 HREF="r4484.htm#AEN4496"
   1520 ><CODE
   1521 CLASS="CONSTANT"
   1522 >V4L2_PIX_FMT_UYVY</CODE
   1523 > 4 &times; 4
   1524 pixel image</A
   1525 ></DT
   1526 ><DT
   1527 >2-1. <A
   1528 HREF="r4629.htm#AEN4645"
   1529 ><CODE
   1530 CLASS="CONSTANT"
   1531 >V4L2_PIX_FMT_Y41P</CODE
   1532 > 8 &times; 4
   1533 pixel image</A
   1534 ></DT
   1535 ><DT
   1536 >2-1. <A
   1537 HREF="r4850.htm#AEN4871"
   1538 ><CODE
   1539 CLASS="CONSTANT"
   1540 >V4L2_PIX_FMT_YVU420</CODE
   1541 > 4 &times; 4
   1542 pixel image</A
   1543 ></DT
   1544 ><DT
   1545 >2-1. <A
   1546 HREF="r5016.htm#AEN5032"
   1547 ><CODE
   1548 CLASS="CONSTANT"
   1549 >V4L2_PIX_FMT_YVU410</CODE
   1550 > 4 &times; 4
   1551 pixel image</A
   1552 ></DT
   1553 ><DT
   1554 >2-1. <A
   1555 HREF="r5154.htm#AEN5170"
   1556 ><CODE
   1557 CLASS="CONSTANT"
   1558 >V4L2_PIX_FMT_YUV422P</CODE
   1559 > 4 &times; 4
   1560 pixel image</A
   1561 ></DT
   1562 ><DT
   1563 >2-1. <A
   1564 HREF="r5319.htm#AEN5337"
   1565 ><CODE
   1566 CLASS="CONSTANT"
   1567 >V4L2_PIX_FMT_YUV411P</CODE
   1568 > 4 &times; 4
   1569 pixel image</A
   1570 ></DT
   1571 ><DT
   1572 >2-1. <A
   1573 HREF="r5470.htm#AEN5493"
   1574 ><CODE
   1575 CLASS="CONSTANT"
   1576 >V4L2_PIX_FMT_NV12</CODE
   1577 > 4 &times; 4
   1578 pixel image</A
   1579 ></DT
   1580 ><DT
   1581 >3-1. <A
   1582 HREF="x5791.htm#AEN5823"
   1583 >Mapping buffers</A
   1584 ></DT
   1585 ><DT
   1586 >3-2. <A
   1587 HREF="x5884.htm#AEN5899"
   1588 >Initiating streaming I/O with user pointers</A
   1589 ></DT
   1590 ><DT
   1591 >4-1. <A
   1592 HREF="x6909.htm#AEN6949"
   1593 >Finding a framebuffer device for OSD</A
   1594 ></DT
   1595 ></DL
   1596 ></DIV
   1597 ></DIV
   1598 ><DIV
   1599 CLASS="NAVFOOTER"
   1600 ><HR
   1601 ALIGN="LEFT"
   1602 WIDTH="100%"><TABLE
   1603 SUMMARY="Footer navigation table"
   1604 WIDTH="100%"
   1605 BORDER="0"
   1606 CELLPADDING="0"
   1607 CELLSPACING="0"
   1608 ><TR
   1609 ><TD
   1610 WIDTH="33%"
   1611 ALIGN="left"
   1612 VALIGN="top"
   1613 >&nbsp;</TD
   1614 ><TD
   1615 WIDTH="34%"
   1616 ALIGN="center"
   1617 VALIGN="top"
   1618 >&nbsp;</TD
   1619 ><TD
   1620 WIDTH="33%"
   1621 ALIGN="right"
   1622 VALIGN="top"
   1623 ><A
   1624 HREF="f163.htm"
   1625 ACCESSKEY="N"
   1626 >Next</A
   1627 ></TD
   1628 ></TR
   1629 ><TR
   1630 ><TD
   1631 WIDTH="33%"
   1632 ALIGN="left"
   1633 VALIGN="top"
   1634 >&nbsp;</TD
   1635 ><TD
   1636 WIDTH="34%"
   1637 ALIGN="center"
   1638 VALIGN="top"
   1639 >&nbsp;</TD
   1640 ><TD
   1641 WIDTH="33%"
   1642 ALIGN="right"
   1643 VALIGN="top"
   1644 >Introduction</TD
   1645 ></TR
   1646 ></TABLE
   1647 ></DIV
   1648 ></BODY
   1649 ></HTML
   1650 >
   1651