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authorDevin Heitmueller <dheitmueller@kernellabs.com>2010-03-11 21:27:59 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2010-05-18 00:50:16 -0300
commit7a01f6dbc7abb85a6ec048dd45db92ef1b91fe78 (patch)
treee851423ecb63c95e326f45707fce8852641379e9
parentfea551fae99c79f43e519cf53e35462ff5ce2a03 (diff)
downloadlinux-linaro-android-7a01f6dbc7abb85a6ec048dd45db92ef1b91fe78.tar.gz
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: Devin Heitmueller <dheitmueller@kernellabs.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
-rw-r--r--Documentation/DocBook/v4l/controls.xml6
-rw-r--r--include/linux/videodev2.h5
2 files changed, 10 insertions, 1 deletions
diff --git a/Documentation/DocBook/v4l/controls.xml b/Documentation/DocBook/v4l/controls.xml
index f4645061041..e1bdbb6eff8 100644
--- a/Documentation/DocBook/v4l/controls.xml
+++ b/Documentation/DocBook/v4l/controls.xml
@@ -267,6 +267,12 @@ minimum value disables backlight compensation.</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>
<entry>Enable the color killer (&ie; force a black &amp; white image in case of a weak video signal).</entry>
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 3c265603d73..418dacf5261 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -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)