diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-16 18:27:32 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-16 18:27:32 -0700 |
commit | bace3db5da970c4d4f80a1ffa988ec66c7f6a8f5 (patch) | |
tree | ab893a29048a3a4ae91d7261a8f4946f3017eff1 /Documentation/DocBook/media/v4l/pixfmt-yuv422m.xml | |
parent | 8759957b77ac1b5b5bdfac5ba049789107e85190 (diff) | |
parent | 8331c055b23c4155b896a2c3791704ae68992d2b (diff) |
Merge tag 'media/v4.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab:
- Added support for some new video formats
- mn88473 DVB frontend driver got promoted from staging
- several improvements at the VSP1 driver
- several cleanups and improvements at the Media Controller
- added Media Controller support to snd-usb-audio. Currently, enabled
only for au0828-based V4L2/DVB boards
- Several improvements at nuvoton-cir: it now supports wake up codes
- Add media controller support to em28xx and saa7134 drivers
- coda driver now accepts NXP distributed firmware files
- Some legacy SoC camera drivers will be moving to staging, as they're
outdated and nobody so far is willing to fix and convert them to use
the current media framework
- As usual, lots of cleanups, improvements and new board additions.
* tag 'media/v4.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (381 commits)
media: au0828 disable tuner to demod link in au0828_media_device_register()
[media] touptek: cast char types on %x printk
[media] touptek: don't DMA at the stack
[media] mceusb: use %*ph for small buffer dumps
[media] v4l: exynos4-is: Drop unneeded check when setting up fimc-lite links
[media] v4l: vsp1: Check if an entity is a subdev with the right function
[media] hide unused functions for !MEDIA_CONTROLLER
[media] em28xx: fix Terratec Grabby AC97 codec detection
[media] media: add prefixes to interface types
[media] media: rc: nuvoton: switch attribute wakeup_data to text
[media] v4l2-ioctl: fix YUV422P pixel format description
[media] media: fix null pointer dereference in v4l_vb2q_enable_media_source()
[media] v4l2-mc.h: fix yet more compiler errors
[media] staging/media: add missing TODO files
[media] media.h: always start with 1 for the audio entities
[media] sound/usb: Use meaninful names for goto labels
[media] v4l2-mc.h: fix compiler warnings
[media] media: au0828 audio mixer isn't connected to decoder
[media] sound/usb: Use Media Controller API to share media resources
[media] dw2102: add support for TeVii S662
...
Diffstat (limited to 'Documentation/DocBook/media/v4l/pixfmt-yuv422m.xml')
-rw-r--r-- | Documentation/DocBook/media/v4l/pixfmt-yuv422m.xml | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/Documentation/DocBook/media/v4l/pixfmt-yuv422m.xml b/Documentation/DocBook/media/v4l/pixfmt-yuv422m.xml new file mode 100644 index 000000000000..dd502802cb75 --- /dev/null +++ b/Documentation/DocBook/media/v4l/pixfmt-yuv422m.xml @@ -0,0 +1,166 @@ + <refentry> + <refmeta> + <refentrytitle>V4L2_PIX_FMT_YUV422M ('YM16'), V4L2_PIX_FMT_YVU422M ('YM61')</refentrytitle> + &manvol; + </refmeta> + <refnamediv> + <refname id="V4L2-PIX-FMT-YUV422M"><constant>V4L2_PIX_FMT_YUV422M</constant></refname> + <refname id="V4L2-PIX-FMT-YVU422M"><constant>V4L2_PIX_FMT_YVU422M</constant></refname> + <refpurpose>Planar formats with ½ horizontal resolution, also + known as YUV and YVU 4:2:2</refpurpose> + </refnamediv> + + <refsect1> + <title>Description</title> + + <para>This is a multi-planar format, as opposed to a packed format. +The three components are separated into three sub-images or planes.</para> + + <para>The Y plane is first. The Y plane has one byte per pixel. +For <constant>V4L2_PIX_FMT_YUV422M</constant> the Cb data +constitutes the second plane which is half the width of the Y plane (and of the +image). Each Cb belongs to two pixels. For example, +Cb<subscript>0</subscript> belongs to Y'<subscript>00</subscript>, +Y'<subscript>01</subscript>. The Cr data, just like the Cb plane, is +in the third plane. </para> + + <para><constant>V4L2_PIX_FMT_YVU422M</constant> is the same except +the Cr data is stored in the second plane and the Cb data in the third plane. +</para> + + <para>If the Y plane has pad bytes after each row, then the Cb +and Cr planes have half as many pad bytes after their rows. In other +words, two Cx rows (including padding) is exactly as long as one Y row +(including padding).</para> + + <para><constant>V4L2_PIX_FMT_YUV422M</constant> and +<constant>V4L2_PIX_FMT_YVU422M</constant> are intended to be +used only in drivers and applications that support the multi-planar API, +described in <xref linkend="planar-apis"/>. </para> + + <example> + <title><constant>V4L2_PIX_FMT_YUV422M</constant> 4 × 4 +pixel image</title> + + <formalpara> + <title>Byte Order.</title> + <para>Each cell is one byte. + <informaltable frame="none"> + <tgroup cols="5" align="center"> + <colspec align="left" colwidth="2*" /> + <tbody valign="top"> + <row> + <entry>start0 + 0:</entry> + <entry>Y'<subscript>00</subscript></entry> + <entry>Y'<subscript>01</subscript></entry> + <entry>Y'<subscript>02</subscript></entry> + <entry>Y'<subscript>03</subscript></entry> + </row> + <row> + <entry>start0 + 4:</entry> + <entry>Y'<subscript>10</subscript></entry> + <entry>Y'<subscript>11</subscript></entry> + <entry>Y'<subscript>12</subscript></entry> + <entry>Y'<subscript>13</subscript></entry> + </row> + <row> + <entry>start0 + 8:</entry> + <entry>Y'<subscript>20</subscript></entry> + <entry>Y'<subscript>21</subscript></entry> + <entry>Y'<subscript>22</subscript></entry> + <entry>Y'<subscript>23</subscript></entry> + </row> + <row> + <entry>start0 + 12:</entry> + <entry>Y'<subscript>30</subscript></entry> + <entry>Y'<subscript>31</subscript></entry> + <entry>Y'<subscript>32</subscript></entry> + <entry>Y'<subscript>33</subscript></entry> + </row> + <row><entry></entry></row> + <row> + <entry>start1 + 0:</entry> + <entry>Cb<subscript>00</subscript></entry> + <entry>Cb<subscript>01</subscript></entry> + </row> + <row> + <entry>start1 + 2:</entry> + <entry>Cb<subscript>10</subscript></entry> + <entry>Cb<subscript>11</subscript></entry> + </row> + <row> + <entry>start1 + 4:</entry> + <entry>Cb<subscript>20</subscript></entry> + <entry>Cb<subscript>21</subscript></entry> + </row> + <row> + <entry>start1 + 6:</entry> + <entry>Cb<subscript>30</subscript></entry> + <entry>Cb<subscript>31</subscript></entry> + </row> + <row><entry></entry></row> + <row> + <entry>start2 + 0:</entry> + <entry>Cr<subscript>00</subscript></entry> + <entry>Cr<subscript>01</subscript></entry> + </row> + <row> + <entry>start2 + 2:</entry> + <entry>Cr<subscript>10</subscript></entry> + <entry>Cr<subscript>11</subscript></entry> + </row> + <row> + <entry>start2 + 4:</entry> + <entry>Cr<subscript>20</subscript></entry> + <entry>Cr<subscript>21</subscript></entry> + </row> + <row> + <entry>start2 + 6:</entry> + <entry>Cr<subscript>30</subscript></entry> + <entry>Cr<subscript>31</subscript></entry> + </row> + </tbody> + </tgroup> + </informaltable> + </para> + </formalpara> + + <formalpara> + <title>Color Sample Location.</title> + <para> + <informaltable frame="none"> + <tgroup cols="7" align="center"> + <tbody valign="top"> + <row> + <entry></entry> + <entry>0</entry><entry></entry><entry>1</entry><entry></entry> + <entry>2</entry><entry></entry><entry>3</entry> + </row> + <row> + <entry>0</entry> + <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry> + <entry>Y</entry><entry>C</entry><entry>Y</entry> + </row> + <row> + <entry>1</entry> + <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry> + <entry>Y</entry><entry>C</entry><entry>Y</entry> + </row> + <row> + <entry>2</entry> + <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry> + <entry>Y</entry><entry>C</entry><entry>Y</entry> + </row> + <row> + <entry>3</entry> + <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry> + <entry>Y</entry><entry>C</entry><entry>Y</entry> + </row> + </tbody> + </tgroup> + </informaltable> + </para> + </formalpara> + </example> + </refsect1> + </refentry> |