diff options
| author | Naushir Patuck <naush@raspberrypi.com> | 2020-04-24 11:46:57 +0100 |
|---|---|---|
| committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2020-04-27 20:18:08 +0300 |
| commit | fa77a02c0a099ad02ed55935bdbe8cd441a8d893 (patch) | |
| tree | 8290bd44507f8ed45ab9cc465a86941c39b1f68a /src/libcamera/control_ids.yaml | |
| parent | 47d09a13b3acead2cd6007d6b6022931756c9ae7 (diff) | |
libcamera: controls: Updates to gain and exposure controls
Rename:
ManualExposure -> ExposureTime
ManualGain -> AnalogueGain
Use micro-seconds units for ExposureTime. This is changed from milli-
seconds. The latter would not allow very low exposure times.
AnalogueGain switch to use a float to allow fractional gain adjustments.
Update the uvcvideo pipeline handler to use the new exposure and gain
units. For ExposureTime, UVC uses units of 100 micro-seconds, so map
the values before setting V4L2_CID_EXPOSURE_ABSOLUTE. For AnalogueGain,
UVC has no explicit gain units, so map the default gain value to 1.0
and linearly scale to the requested value.
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Diffstat (limited to 'src/libcamera/control_ids.yaml')
| -rw-r--r-- | src/libcamera/control_ids.yaml | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/src/libcamera/control_ids.yaml b/src/libcamera/control_ids.yaml index bcbab195..d8bdb382 100644 --- a/src/libcamera/control_ids.yaml +++ b/src/libcamera/control_ids.yaml @@ -12,7 +12,7 @@ controls: description: | Enable or disable the AE. - \sa ManualExposure + \sa ExposureTime AnalogueGain - AeLocked: type: bool @@ -30,8 +30,6 @@ controls: description: | Enable or disable the AWB. - \sa ManualGain - - Brightness: type: int32_t description: Specify a fixed brightness parameter @@ -44,12 +42,20 @@ controls: type: int32_t description: Specify a fixed saturation parameter - - ManualExposure: + - ExposureTime: type: int32_t - description: Specify a fixed exposure time in milli-seconds + description: | + Exposure time (shutter speed) for the frame applied in the sensor + device. This value is specified in micro-seconds. - - ManualGain: - type: int32_t - description: Specify a fixed gain parameter + \sa AnalogueGain AeEnable + + - AnalogueGain: + type: float + description: | + Analogue gain value applied in the sensor device. + The value of the control specifies the gain multiplier applied to all + colour channels. This value cannot be lower than 1.0. + \sa ExposureTime AeEnable ... |