diff options
| -rw-r--r-- | Documentation/DocBook/media/v4l/controls.xml | 29 | ||||
| -rw-r--r-- | drivers/media/video/v4l2-ctrls.c | 10 | ||||
| -rw-r--r-- | include/linux/videodev2.h | 7 |
3 files changed, 46 insertions, 0 deletions
diff --git a/Documentation/DocBook/media/v4l/controls.xml b/Documentation/DocBook/media/v4l/controls.xml index 8fccfe1b205..e8c63e04741 100644 --- a/Documentation/DocBook/media/v4l/controls.xml +++ b/Documentation/DocBook/media/v4l/controls.xml @@ -2864,6 +2864,35 @@ exposure time and/or aperture.</para></entry> </row> <row><entry></entry></row> + <row id="v4l2-exposure-metering"> + <entry spanname="id"><constant>V4L2_CID_EXPOSURE_METERING</constant> </entry> + <entry>enum v4l2_exposure_metering</entry> + </row><row><entry spanname="descr">Determines how the camera measures +the amount of light available for the frame exposure. Possible values are:</entry> + </row> + <row> + <entrytbl spanname="descr" cols="2"> + <tbody valign="top"> + <row> + <entry><constant>V4L2_EXPOSURE_METERING_AVERAGE</constant> </entry> + <entry>Use the light information coming from the entire frame +and average giving no weighting to any particular portion of the metered area. + </entry> + </row> + <row> + <entry><constant>V4L2_EXPOSURE_METERING_CENTER_WEIGHTED</constant> </entry> + <entry>Average the light information coming from the entire frame +giving priority to the center of the metered area.</entry> + </row> + <row> + <entry><constant>V4L2_EXPOSURE_METERING_SPOT</constant> </entry> + <entry>Measure only very small area at the center of the frame.</entry> + </row> + </tbody> + </entrytbl> + </row> + <row><entry></entry></row> + <row> <entry spanname="id"><constant>V4L2_CID_PAN_RELATIVE</constant> </entry> <entry>integer</entry> diff --git a/drivers/media/video/v4l2-ctrls.c b/drivers/media/video/v4l2-ctrls.c index debaf9fb900..55dd813b734 100644 --- a/drivers/media/video/v4l2-ctrls.c +++ b/drivers/media/video/v4l2-ctrls.c @@ -230,6 +230,12 @@ const char * const *v4l2_ctrl_get_menu(u32 id) "Aperture Priority Mode", NULL }; + static const char * const camera_exposure_metering[] = { + "Average", + "Center Weighted", + "Spot", + NULL + }; static const char * const colorfx[] = { "None", "Black & White", @@ -434,6 +440,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id) return camera_power_line_frequency; case V4L2_CID_EXPOSURE_AUTO: return camera_exposure_auto; + case V4L2_CID_EXPOSURE_METERING: + return camera_exposure_metering; case V4L2_CID_COLORFX: return colorfx; case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: @@ -632,6 +640,7 @@ const char *v4l2_ctrl_get_name(u32 id) case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization"; case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity"; case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto"; + case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode"; /* FM Radio Modulator control */ /* Keep the order of the 'case's the same as in videodev2.h! */ @@ -783,6 +792,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type, case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: case V4L2_CID_ISO_SENSITIVITY_AUTO: + case V4L2_CID_EXPOSURE_METERING: *type = V4L2_CTRL_TYPE_MENU; break; case V4L2_CID_LINK_FREQ: diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h index 593a1bd3311..a3e47ad60a6 100644 --- a/include/linux/videodev2.h +++ b/include/linux/videodev2.h @@ -1733,6 +1733,13 @@ enum v4l2_iso_sensitivity_auto_type { V4L2_ISO_SENSITIVITY_AUTO = 1, }; +#define V4L2_CID_EXPOSURE_METERING (V4L2_CID_CAMERA_CLASS_BASE+25) +enum v4l2_exposure_metering { + V4L2_EXPOSURE_METERING_AVERAGE = 0, + V4L2_EXPOSURE_METERING_CENTER_WEIGHTED = 1, + V4L2_EXPOSURE_METERING_SPOT = 2, +}; + /* 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) |