[libcamera-devel] [PATCH v3 05/13] libcamera: camera_sensor: Break out properties initialization
Laurent Pinchart
laurent.pinchart at ideasonboard.com
Sat Apr 25 14:49:53 CEST 2020
Hi Jacopo,
Thank you for the patch.
On Fri, Apr 24, 2020 at 11:52:56PM +0200, Jacopo Mondi wrote:
> Refactor the CameraSensor properties initialization to a dedicated
> function as it is expected to grow as we augment the number of
> properties.
>
> While at it, move documentation of the properties() method to match the
> declaration order in the class definition.
>
> Reviewed-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
> Reviewed-by: Niklas Söderlund <niklas.soderlund at ragnatech.se>
> Signed-off-by: Jacopo Mondi <jacopo at jmondi.org>
> ---
> src/libcamera/camera_sensor.cpp | 99 +++++++++++++++------------
> src/libcamera/include/camera_sensor.h | 1 +
> 2 files changed, 55 insertions(+), 45 deletions(-)
>
> diff --git a/src/libcamera/camera_sensor.cpp b/src/libcamera/camera_sensor.cpp
> index 2219a4307436..8d7abc7147a7 100644
> --- a/src/libcamera/camera_sensor.cpp
> +++ b/src/libcamera/camera_sensor.cpp
> @@ -91,45 +91,6 @@ int CameraSensor::init()
> if (ret < 0)
> return ret;
>
> - /* Retrieve and store the camera sensor properties. */
> - const ControlInfoMap &controls = subdev_->controls();
> - int32_t propertyValue;
> -
> - /* Camera Location: default is front location. */
> - const auto &locationControl = controls.find(V4L2_CID_CAMERA_SENSOR_LOCATION);
> - if (locationControl != controls.end()) {
> - int32_t v4l2Location =
> - locationControl->second.def().get<int32_t>();
> -
> - switch (v4l2Location) {
> - default:
> - LOG(CameraSensor, Warning)
> - << "Unsupported camera location "
> - << v4l2Location << ", setting to Front";
> - /* Fall-through */
> - case V4L2_LOCATION_FRONT:
> - propertyValue = properties::CameraLocationFront;
> - break;
> - case V4L2_LOCATION_BACK:
> - propertyValue = properties::CameraLocationBack;
> - break;
> - case V4L2_LOCATION_EXTERNAL:
> - propertyValue = properties::CameraLocationExternal;
> - break;
> - }
> - } else {
> - propertyValue = properties::CameraLocationFront;
> - }
> - properties_.set(properties::Location, propertyValue);
> -
> - /* Camera Rotation: default is 0 degrees. */
> - const auto &rotationControl = controls.find(V4L2_CID_CAMERA_SENSOR_ROTATION);
> - if (rotationControl != controls.end())
> - propertyValue = rotationControl->second.def().get<int32_t>();
> - else
> - propertyValue = 0;
> - properties_.set(properties::Rotation, propertyValue);
> -
> /* Enumerate and cache media bus codes and sizes. */
> const ImageFormats formats = subdev_->formats(0);
> if (formats.isEmpty()) {
> @@ -160,6 +121,54 @@ int CameraSensor::init()
> std::sort(mbusCodes_.begin(), mbusCodes_.end());
> std::sort(sizes_.begin(), sizes_.end());
>
> + return initProperties();
Out of curiosity, is there a reason to have put the call at the end
instead of where the code was removed ?
> +}
> +
> +/**
> + * \brief Initialize the camera sensor standard properties
> + *
> + * This method initializes the camera sensor standard properties, by inspecting
s/,//
> + * the control information reported by the sensor subdevice.
> + *
> + * \return 0 on success, a negative error code otherwise
> + */
> +int CameraSensor::initProperties()
> +{
> + const ControlInfoMap &controlMap = subdev_->controls();
> + int32_t propertyValue;
> +
> + /* Camera Location: default is front location. */
> + const auto &locationControl = controlMap.find(V4L2_CID_CAMERA_SENSOR_LOCATION);
> + if (locationControl != controlMap.end()) {
> + int32_t v4l2Location =
> + locationControl->second.def().get<int32_t>();
Maybe keep the blank line here for clarity ?
> + switch (v4l2Location) {
> + case V4L2_LOCATION_EXTERNAL:
> + propertyValue = properties::CameraLocationExternal;
> + break;
> + case V4L2_LOCATION_FRONT:
> + propertyValue = properties::CameraLocationFront;
> + break;
> + case V4L2_LOCATION_BACK:
> + propertyValue = properties::CameraLocationBack;
> + break;
> + default:
> + LOG(CameraSensor, Error)
> + << "Unsupported camera location: " << v4l2Location;
> + return -EINVAL;
This is a behavioural change, as we used to default to
properties::CameraLocationFront when the control had an unknown value.
I'm not opposed to that, but it should be moved to a different patch,
it's not even mentioned in the commit message. Let's keep patches that
move code around free of behavioural changes, that's easier to review.
> + }
> + } else {
> + propertyValue = properties::CameraLocationFront;
> + }
> + properties_.set(properties::Location, propertyValue);
> +
> + /* Camera Rotation: default is 0 degrees. */
> + propertyValue = 0;
> + const auto &rotationControl = controlMap.find(V4L2_CID_CAMERA_SENSOR_ROTATION);
> + if (rotationControl != controlMap.end())
> + propertyValue = rotationControl->second.def().get<int32_t>();
Same here, I'd keep the existing else branch (not a behavioural change
though).
> + properties_.set(properties::Rotation, propertyValue);
> +
> return 0;
> }
>
> @@ -325,12 +334,6 @@ int CameraSensor::getControls(ControlList *ctrls)
> return subdev_->getControls(ctrls);
> }
>
> -/**
> - * \fn CameraSensor::properties()
> - * \brief Retrieve the camera sensor properties
> - * \return The list of camera sensor properties
> - */
> -
> /**
> * \brief Write controls to the sensor
> * \param[in] ctrls The list of controls to write
> @@ -361,6 +364,12 @@ int CameraSensor::setControls(ControlList *ctrls)
> return subdev_->setControls(ctrls);
> }
>
> +/**
> + * \fn CameraSensor::properties()
> + * \brief Retrieve the camera sensor properties
> + * \return The list of camera sensor properties
> + */
> +
> std::string CameraSensor::logPrefix() const
> {
> return "'" + subdev_->entity()->name() + "'";
> diff --git a/src/libcamera/include/camera_sensor.h b/src/libcamera/include/camera_sensor.h
> index 99cff98128dc..8fa4d450f959 100644
> --- a/src/libcamera/include/camera_sensor.h
> +++ b/src/libcamera/include/camera_sensor.h
> @@ -32,6 +32,7 @@ public:
> CameraSensor &operator=(const CameraSensor &) = delete;
>
> int init();
> + int initProperties();
Shouldn't this be a private function ?
With these small issues fixed,
Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
>
> const MediaEntity *entity() const { return entity_; }
> const std::vector<unsigned int> &mbusCodes() const { return mbusCodes_; }
--
Regards,
Laurent Pinchart
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