PawletOS/external_libcamera
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

libcamera: raspberrypi: Add control of sensor vblanking

Browse Source 
Add support for setting V4L2_CID_VBLANK appropriately when setting
V4L2_CID_EXPOSURE. This will allow adaptive framerates during
viewfinder use cases (e.g. when the exposure time goes above 33ms, we
can reduce the framerate to lower than 30fps).

The minimum and maximum frame durations are provided via libcamera
controls, and will prioritise exposure time limits over any AGC request.

V4L2_CID_VBLANK is controlled through the staggered writer, just like
the exposure and gain controls.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: David Plowman <david.plowman@raspberrypi.com>
Tested-by: David Plowman <david.plowman@raspberrypi.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Naushir Patuck
2021-01-19 15:30:46 +00:00
committed by Laurent Pinchart
parent 6232ec3c16
commit 92b8ccc42a
8 changed files with 130 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/libcamera/pipeline/raspberrypi/raspberrypi.cpp
+2 -1
View File
@@ -1233,7 +1233,8 @@ int RPiCameraData::configureIPA(const CameraConfiguration *config)
if (!staggeredCtrl_) {
staggeredCtrl_.init(unicam_[Unicam::Image].dev(),
{ { V4L2_CID_ANALOGUE_GAIN, result.data[resultIdx++] },
{ V4L2_CID_EXPOSURE, result.data[resultIdx++] } });
{ V4L2_CID_EXPOSURE, result.data[resultIdx++] },
{ V4L2_CID_VBLANK, result.data[resultIdx++] } });
sensorMetadata_ = result.data[resultIdx++];
}
}