256 lines
7.7 KiB
ReStructuredText
256 lines
7.7 KiB
ReStructuredText
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.. -*- coding: utf-8; mode: rst -*-
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.. _pixfmt-reserved:
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***************************
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Reserved Format Identifiers
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***************************
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These formats are not defined by this specification, they are just
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listed for reference and to avoid naming conflicts. If you want to
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register your own format, send an e-mail to the linux-media mailing list
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`https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__
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for inclusion in the ``videodev2.h`` file. If you want to share your
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format with other developers add a link to your documentation and send a
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copy to the linux-media mailing list for inclusion in this section. If
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you think your format should be listed in a standard format section
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please make a proposal on the linux-media mailing list.
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.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
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.. _reserved-formats:
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.. flat-table:: Reserved Image Formats
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:header-rows: 1
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:stub-columns: 0
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:widths: 3 1 4
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* - Identifier
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- Code
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- Details
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* .. _V4L2-PIX-FMT-DV:
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- ``V4L2_PIX_FMT_DV``
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- 'dvsd'
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- unknown
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* .. _V4L2-PIX-FMT-ET61X251:
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- ``V4L2_PIX_FMT_ET61X251``
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- 'E625'
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- Compressed format of the ET61X251 driver.
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* .. _V4L2-PIX-FMT-HI240:
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- ``V4L2_PIX_FMT_HI240``
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- 'HI24'
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- 8 bit RGB format used by the BTTV driver.
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* .. _V4L2-PIX-FMT-HM12:
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- ``V4L2_PIX_FMT_HM12``
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- 'HM12'
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- YUV 4:2:0 format used by the IVTV driver,
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`http://www.ivtvdriver.org/ <http://www.ivtvdriver.org/>`__
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The format is documented in the kernel sources in the file
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``Documentation/video4linux/cx2341x/README.hm12``
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* .. _V4L2-PIX-FMT-CPIA1:
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- ``V4L2_PIX_FMT_CPIA1``
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- 'CPIA'
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- YUV format used by the gspca cpia1 driver.
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* .. _V4L2-PIX-FMT-JPGL:
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- ``V4L2_PIX_FMT_JPGL``
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- 'JPGL'
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- JPEG-Light format (Pegasus Lossless JPEG) used in Divio webcams NW
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80x.
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* .. _V4L2-PIX-FMT-SPCA501:
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- ``V4L2_PIX_FMT_SPCA501``
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- 'S501'
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- YUYV per line used by the gspca driver.
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* .. _V4L2-PIX-FMT-SPCA505:
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- ``V4L2_PIX_FMT_SPCA505``
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- 'S505'
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- YYUV per line used by the gspca driver.
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* .. _V4L2-PIX-FMT-SPCA508:
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- ``V4L2_PIX_FMT_SPCA508``
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- 'S508'
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- YUVY per line used by the gspca driver.
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* .. _V4L2-PIX-FMT-SPCA561:
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- ``V4L2_PIX_FMT_SPCA561``
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- 'S561'
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- Compressed GBRG Bayer format used by the gspca driver.
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* .. _V4L2-PIX-FMT-PAC207:
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- ``V4L2_PIX_FMT_PAC207``
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- 'P207'
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- Compressed BGGR Bayer format used by the gspca driver.
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* .. _V4L2-PIX-FMT-MR97310A:
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- ``V4L2_PIX_FMT_MR97310A``
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- 'M310'
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- Compressed BGGR Bayer format used by the gspca driver.
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* .. _V4L2-PIX-FMT-JL2005BCD:
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- ``V4L2_PIX_FMT_JL2005BCD``
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- 'JL20'
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- JPEG compressed RGGB Bayer format used by the gspca driver.
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* .. _V4L2-PIX-FMT-OV511:
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- ``V4L2_PIX_FMT_OV511``
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- 'O511'
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- OV511 JPEG format used by the gspca driver.
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* .. _V4L2-PIX-FMT-OV518:
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- ``V4L2_PIX_FMT_OV518``
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- 'O518'
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- OV518 JPEG format used by the gspca driver.
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* .. _V4L2-PIX-FMT-PJPG:
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- ``V4L2_PIX_FMT_PJPG``
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- 'PJPG'
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- Pixart 73xx JPEG format used by the gspca driver.
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* .. _V4L2-PIX-FMT-SE401:
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- ``V4L2_PIX_FMT_SE401``
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- 'S401'
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- Compressed RGB format used by the gspca se401 driver
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* .. _V4L2-PIX-FMT-SQ905C:
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- ``V4L2_PIX_FMT_SQ905C``
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- '905C'
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- Compressed RGGB bayer format used by the gspca driver.
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* .. _V4L2-PIX-FMT-MJPEG:
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- ``V4L2_PIX_FMT_MJPEG``
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- 'MJPG'
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- Compressed format used by the Zoran driver
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* .. _V4L2-PIX-FMT-PWC1:
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- ``V4L2_PIX_FMT_PWC1``
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- 'PWC1'
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- Compressed format of the PWC driver.
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* .. _V4L2-PIX-FMT-PWC2:
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- ``V4L2_PIX_FMT_PWC2``
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- 'PWC2'
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- Compressed format of the PWC driver.
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* .. _V4L2-PIX-FMT-SN9C10X:
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- ``V4L2_PIX_FMT_SN9C10X``
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- 'S910'
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- Compressed format of the SN9C102 driver.
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* .. _V4L2-PIX-FMT-SN9C20X-I420:
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- ``V4L2_PIX_FMT_SN9C20X_I420``
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- 'S920'
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- YUV 4:2:0 format of the gspca sn9c20x driver.
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* .. _V4L2-PIX-FMT-SN9C2028:
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- ``V4L2_PIX_FMT_SN9C2028``
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- 'SONX'
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- Compressed GBRG bayer format of the gspca sn9c2028 driver.
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* .. _V4L2-PIX-FMT-STV0680:
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- ``V4L2_PIX_FMT_STV0680``
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- 'S680'
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- Bayer format of the gspca stv0680 driver.
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* .. _V4L2-PIX-FMT-WNVA:
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- ``V4L2_PIX_FMT_WNVA``
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- 'WNVA'
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- Used by the Winnov Videum driver,
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`http://www.thedirks.org/winnov/ <http://www.thedirks.org/winnov/>`__
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* .. _V4L2-PIX-FMT-TM6000:
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- ``V4L2_PIX_FMT_TM6000``
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- 'TM60'
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- Used by Trident tm6000
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* .. _V4L2-PIX-FMT-CIT-YYVYUY:
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- ``V4L2_PIX_FMT_CIT_YYVYUY``
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- 'CITV'
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- Used by xirlink CIT, found at IBM webcams.
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Uses one line of Y then 1 line of VYUY
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* .. _V4L2-PIX-FMT-KONICA420:
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- ``V4L2_PIX_FMT_KONICA420``
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- 'KONI'
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- Used by Konica webcams.
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YUV420 planar in blocks of 256 pixels.
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* .. _V4L2-PIX-FMT-YYUV:
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- ``V4L2_PIX_FMT_YYUV``
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- 'YYUV'
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- unknown
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* .. _V4L2-PIX-FMT-Y4:
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- ``V4L2_PIX_FMT_Y4``
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- 'Y04 '
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- Old 4-bit greyscale format. Only the most significant 4 bits of
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each byte are used, the other bits are set to 0.
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* .. _V4L2-PIX-FMT-Y6:
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- ``V4L2_PIX_FMT_Y6``
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- 'Y06 '
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- Old 6-bit greyscale format. Only the most significant 6 bits of
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each byte are used, the other bits are set to 0.
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* .. _V4L2-PIX-FMT-S5C-UYVY-JPG:
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- ``V4L2_PIX_FMT_S5C_UYVY_JPG``
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- 'S5CI'
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- Two-planar format used by Samsung S5C73MX cameras. The first plane
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contains interleaved JPEG and UYVY image data, followed by meta
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data in form of an array of offsets to the UYVY data blocks. The
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actual pointer array follows immediately the interleaved JPEG/UYVY
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data, the number of entries in this array equals the height of the
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UYVY image. Each entry is a 4-byte unsigned integer in big endian
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order and it's an offset to a single pixel line of the UYVY image.
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The first plane can start either with JPEG or UYVY data chunk. The
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size of a single UYVY block equals the UYVY image's width
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multiplied by 2. The size of a JPEG chunk depends on the image and
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can vary with each line.
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The second plane, at an offset of 4084 bytes, contains a 4-byte
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offset to the pointer array in the first plane. This offset is
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followed by a 4-byte value indicating size of the pointer array.
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All numbers in the second plane are also in big endian order.
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Remaining data in the second plane is undefined. The information
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in the second plane allows to easily find location of the pointer
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array, which can be different for each frame. The size of the
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pointer array is constant for given UYVY image height.
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In order to extract UYVY and JPEG frames an application can
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initially set a data pointer to the start of first plane and then
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add an offset from the first entry of the pointers table. Such a
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pointer indicates start of an UYVY image pixel line. Whole UYVY
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line can be copied to a separate buffer. These steps should be
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repeated for each line, i.e. the number of entries in the pointer
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array. Anything what's in between the UYVY lines is JPEG data and
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should be concatenated to form the JPEG stream.
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.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
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.. _format-flags:
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.. flat-table:: Format Flags
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:header-rows: 0
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:stub-columns: 0
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:widths: 3 1 4
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* - ``V4L2_PIX_FMT_FLAG_PREMUL_ALPHA``
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- 0x00000001
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- The color values are premultiplied by the alpha channel value. For
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example, if a light blue pixel with 50% transparency was described
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by RGBA values (128, 192, 255, 128), the same pixel described with
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premultiplied colors would be described by RGBA values (64, 96,
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128, 128)
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