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

libcamera: camera_sensor: Add method to get sensor info

Browse Source 
Add a method to retrieve the CameraSensorInfo to the CameraSensor class.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
This commit is contained in:
Jacopo Mondi
2020-03-05 17:13:35 +01:00
parent 5db1426b60
commit ee4bb92aae
2 changed files with 63 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
src/libcamera/camera_sensor.cpp
View File

@@ -475,6 +475,68 @@ int CameraSensor::setControls(ControlList *ctrls)
return subdev_->setControls(ctrls);
}
/**
* \brief Assemble and return the camera sensor info
* \param[out] info The camera sensor info
*
* The CameraSensorInfo content is assembled by inspecting the currently
* applied sensor configuration and the sensor static properties.
*
* \return 0 on success, a negative error code otherwise
*/
int CameraSensor::sensorInfo(CameraSensorInfo *info) const
{
info->model = model();
/* Get the active area size. */
Rectangle rect = {};
int ret = subdev_->getSelection(0, V4L2_SEL_TGT_CROP_DEFAULT, &rect);
if (ret) {
LOG(CameraSensor, Error)
<< "Failed to construct camera sensor info: "
<< "the camera sensor does not report the active area";
return ret;
}
info->activeAreaSize = { rect.width, rect.height };
/* It's mandatory for the subdevice to report its crop rectangle. */
ret = subdev_->getSelection(0, V4L2_SEL_TGT_CROP, &info->analogCrop);
if (ret) {
LOG(CameraSensor, Error)
<< "Failed to construct camera sensor info: "
<< "the camera sensor does not report the crop rectangle";
return ret;
}
/* The bit depth and image size depend on the currently applied format. */
V4L2SubdeviceFormat format{};
ret = subdev_->getFormat(0, &format);
if (ret)
return ret;
info->bitsPerPixel = format.bitsPerPixel();
info->outputSize = format.size;
/*
* Retrieve the pixel rate and the line length through V4L2 controls.
* Support for the V4L2_CID_PIXEL_RATE and V4L2_CID_HBLANK controls is
* mandatory.
*/
ControlList ctrls = subdev_->getControls({ V4L2_CID_PIXEL_RATE,
V4L2_CID_HBLANK });
if (ctrls.empty()) {
LOG(CameraSensor, Error)
<< "Failed to retrieve camera info controls";
return -EINVAL;
}
int32_t hblank = ctrls.get(V4L2_CID_HBLANK).get<int32_t>();
info->lineLength = info->outputSize.width + hblank;
info->pixelRate = ctrls.get(V4L2_CID_PIXEL_RATE).get<int64_t>();
return 0;
}
std::string CameraSensor::logPrefix() const
{
return "'" + subdev_->entity()->name() + "'";

1
src/libcamera/include/camera_sensor.h
View File

@@ -61,6 +61,7 @@ public:
int setControls(ControlList *ctrls);
const ControlList &properties() const { return properties_; }
int sensorInfo(CameraSensorInfo *info) const;
protected:
std::string logPrefix() const;