Add V4L2_CID_WIDE_DYNAMIC_RANGE camera class control for the
camera wide dynamic range (WDR, HDR) feature. This control
can be used to enable/disable wide dynamic range. It might
get converted to a menu control in future if more options
are needed.
Signed-off-by: HeungJun Kim <riverful.kim@xxxxxxxxxxx>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
Documentation/DocBook/media/v4l/controls.xml | 15 +++++++++++++++
drivers/media/video/v4l2-ctrls.c | 2 ++
include/linux/videodev2.h | 2 ++
3 files changed, 19 insertions(+)
diff --git a/Documentation/DocBook/media/v4l/controls.xml b/Documentation/DocBook/media/v4l/controls.xml
index e3f9277..0256a02 100644
--- a/Documentation/DocBook/media/v4l/controls.xml
+++ b/Documentation/DocBook/media/v4l/controls.xml
@@ -3018,6 +3018,21 @@ sky. It corresponds approximately to 9000...10000 K color temperature.
</row>
<row><entry></entry></row>
+ <row id="v4l2-wide-dynamic-range">
+ <entry spanname="id"><constant>V4L2_CID_WIDE_DYNAMIC_RANGE</constant></entry>
+ <entry>boolean</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Enables or disables the camera's wide dynamic
+range feature. This feature allows to obtain clear images in situations where
+intensity of the illumination varies significantly throughout the scene, i.e.
+there are simultaneously very dark and very bright areas. It is most commonly
+realized in cameras by combining two subsequent frames with different exposure
+times. <footnote id="ctypeconv"><para> This control may be changed to a menu
+control in future, if more options are required.</para></footnote></entry>
+ </row>
+ <row><entry></entry></row>
+
</tbody>
</tgroup>
</table>
diff --git a/drivers/media/video/v4l2-ctrls.c b/drivers/media/video/v4l2-ctrls.c
index 02fa9b0..8b47c05 100644
--- a/drivers/media/video/v4l2-ctrls.c
+++ b/drivers/media/video/v4l2-ctrls.c
@@ -614,6 +614,7 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias";
case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset";
+ case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range";
/* FM Radio Modulator control */
/* Keep the order of the 'case's the same as in videodev2.h! */
@@ -705,6 +706,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
+ case V4L2_CID_WIDE_DYNAMIC_RANGE:
*type = V4L2_CTRL_TYPE_BOOLEAN;
*min = 0;
*max = *step = 1;
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 1460419..8964ebc 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -1709,6 +1709,8 @@ enum v4l2_auto_n_preset_white_balance {
V4L2_WHITE_BALANCE_SHADE = 9,
};
+#define V4L2_CID_WIDE_DYNAMIC_RANGE (V4L2_CID_CAMERA_CLASS_BASE+21)
+
/* FM Modulator class control IDs */
#define V4L2_CID_FM_TX_CLASS_BASE (V4L2_CTRL_CLASS_FM_TX | 0x900)
#define V4L2_CID_FM_TX_CLASS (V4L2_CTRL_CLASS_FM_TX | 1)
--
1.7.10
--
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