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V4L/DVB: v4l: add V4L2_PIX_FMT_Y4 and V4L2_PIX_FMT_Y6 pixelformats 

Old 4 and 6 bit greyscale pixel formats for the old bw-qcam webcam.
This is needed to convert it to V4L2.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2010-03-22 04:52:21 -03:00 committed by Mauro Carvalho Chehab
parent 4bfdd58604
commit b3e212dcbd
2 changed files with 14 additions and 0 deletions
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12
Documentation/DocBook/v4l/pixfmt.xml
View File

@ -792,6 +792,18 @@ http://www.thedirks.org/winnov/</ulink></para></entry>
<entry>'YYUV'</entry>
<entry>unknown</entry>
</row>
<row id="V4L2-PIX-FMT-Y4">
<entry><constant>V4L2_PIX_FMT_Y4</constant></entry>
<entry>'Y04 '</entry>
<entry>Old 4-bit greyscale format. Only the least significant 4 bits of each byte are used,
the other bits are set to 0.</entry>
</row>
<row id="V4L2-PIX-FMT-Y6">
<entry><constant>V4L2_PIX_FMT_Y6</constant></entry>
<entry>'Y06 '</entry>
<entry>Old 6-bit greyscale format. Only the least significant 6 bits of each byte are used,
the other bits are set to 0.</entry>
</row>
</tbody>
</tgroup>
</table>

2
include/linux/videodev2.h
View File

@ -294,6 +294,8 @@ struct v4l2_pix_format {
/* Grey formats */
#define V4L2_PIX_FMT_GREY v4l2_fourcc('G', 'R', 'E', 'Y') /* 8 Greyscale */
#define V4L2_PIX_FMT_Y4 v4l2_fourcc('Y', '0', '4', ' ') /* 4 Greyscale */
#define V4L2_PIX_FMT_Y6 v4l2_fourcc('Y', '0', '6', ' ') /* 6 Greyscale */
#define V4L2_PIX_FMT_Y10 v4l2_fourcc('Y', '1', '0', ' ') /* 10 Greyscale */
#define V4L2_PIX_FMT_Y16 v4l2_fourcc('Y', '1', '6', ' ') /* 16 Greyscale */