Commit 7a01f6db authored by Devin Heitmueller's avatar Devin Heitmueller Committed by Mauro Carvalho Chehab
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V4L/DVB: videodev2: introduce a common control for chroma gain 



Introduce a new control for modifying the chroma gain.  This allows for user
intervention in abnormal signal conditions cases where the decoder's chroma
AGC cannot compensate and the value needs to be adjusted manually.

This work was sponsored by EyeMagnet Limited.

Signed-off-by: default avatarDevin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent fea551fa

Documentation/DocBook/v4l/controls.xml

+6 −0
Original line number Diff line number Diff line
@@ -266,6 +266,12 @@ minimum value disables backlight compensation.</entry> 
	    <entry>boolean</entry>

	    <entry>Chroma automatic gain control.</entry>

	  </row>

	  <row>

	    <entry><constant>V4L2_CID_CHROMA_GAIN</constant></entry>

	    <entry>integer</entry>

	    <entry>Adjusts the Chroma gain control (for use when chroma AGC

	    is disabled).</entry>

	  </row>

	  <row>

	    <entry><constant>V4L2_CID_COLOR_KILLER</constant></entry>

	    <entry>boolean</entry>

include/linux/videodev2.h

+4 −1
Original line number Diff line number Diff line
@@ -1030,8 +1030,11 @@ enum v4l2_colorfx { 


#define V4L2_CID_ROTATE				(V4L2_CID_BASE+34)

#define V4L2_CID_BG_COLOR			(V4L2_CID_BASE+35)



#define V4L2_CID_CHROMA_GAIN                    (V4L2_CID_BASE+36)



/* last CID + 1 */

#define V4L2_CID_LASTP1                         (V4L2_CID_BASE+36)

#define V4L2_CID_LASTP1                         (V4L2_CID_BASE+37)



/*  MPEG-class control IDs defined by V4L2 */

#define V4L2_CID_MPEG_BASE 			(V4L2_CTRL_CLASS_MPEG | 0x900)