From 44d44a1acde974dbc91c19815a41d3a895a44daf Mon Sep 17 00:00:00 2001 From: Sylwester Nawrocki Date: Tue, 6 Mar 2012 07:05:45 -0300 Subject: [PATCH] [media] V4L: Add camera wide dynamic range control 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 Signed-off-by: Sylwester Nawrocki Signed-off-by: Kyungmin Park Signed-off-by: Mauro Carvalho Chehab --- 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 56dfdf02c76b..16c7aab595af 100644 --- a/Documentation/DocBook/media/v4l/controls.xml +++ b/Documentation/DocBook/media/v4l/controls.xml @@ -3092,6 +3092,21 @@ sky. It corresponds approximately to 9000...10000 K color temperature. + + V4L2_CID_WIDE_DYNAMIC_RANGE + boolean + + + 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. This control may be changed to a menu +control in the future, if more options are required. + + + diff --git a/drivers/media/video/v4l2-ctrls.c b/drivers/media/video/v4l2-ctrls.c index 56ac71c8ba37..0c18c82e0b59 100644 --- a/drivers/media/video/v4l2-ctrls.c +++ b/drivers/media/video/v4l2-ctrls.c @@ -621,6 +621,7 @@ 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! */ @@ -723,6 +724,7 @@ 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 85c4e8f1090f..d93e42bc0348 100644 --- a/include/linux/videodev2.h +++ b/include/linux/videodev2.h @@ -1723,6 +1723,8 @@ 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) -- 2.20.1