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libcamera: camera_sensor: Cache mounting orientation instead of transform

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The cached rotationTransform_ value is used in computeTransform() only,
to compute the mounting orientation. Cache the mounting orientation
instead, removing the need for the intermediate conversion of the
rotation to a transform.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2023-10-20 16:58:24 +03:00
parent 4814d8f1b5
commit 7a5d4b83e5
2 changed files with 10 additions and 11 deletions
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3
include/libcamera/internal/camera_sensor.h
View file

@ -17,6 +17,7 @@
#include <libcamera/control_ids.h>
#include <libcamera/controls.h>
#include <libcamera/geometry.h>
#include <libcamera/orientation.h>
#include <libcamera/transform.h>
#include <libcamera/ipa/core_ipa_interface.h>
@ -114,7 +115,7 @@ private:
Rectangle activeArea_;
const BayerFormat *bayerFormat_;
bool supportFlips_;
Transform rotationTransform_;
Orientation mountingOrientation_;
ControlList properties_;

18
src/libcamera/camera_sensor.cpp
View file

@ -470,12 +470,12 @@ int CameraSensor::initProperties()
* rotation for later use in computeTransform().
*/
bool success;
rotationTransform_ = transformFromRotation(propertyValue, &success);
mountingOrientation_ = orientationFromRotation(propertyValue, &success);
if (!success) {
LOG(CameraSensor, Warning)
<< "Invalid rotation of " << propertyValue
<< " degrees - ignoring";
rotationTransform_ = Transform::Identity;
mountingOrientation_ = Orientation::Rotate0;
}
properties_.set(properties::Rotation, propertyValue);
@ -483,7 +483,7 @@ int CameraSensor::initProperties()
LOG(CameraSensor, Warning)
<< "Rotation control not available, default to 0 degrees";
properties_.set(properties::Rotation, 0);
rotationTransform_ = Transform::Identity;
mountingOrientation_ = Orientation::Rotate0;
}
properties_.set(properties::PixelArraySize, pixelArraySize_);
@ -1137,14 +1137,12 @@ void CameraSensor::updateControlInfo()
*/
Transform CameraSensor::computeTransform(Orientation *orientation) const
{
Orientation mountingOrientation = transformToOrientation(rotationTransform_);
/*
* If we cannot do any flips we cannot change the native camera mounting
* orientation.
*/
if (!supportFlips_) {
*orientation = mountingOrientation;
*orientation = mountingOrientation_;
return Transform::Identity;
}
@ -1153,17 +1151,17 @@ Transform CameraSensor::computeTransform(Orientation *orientation) const
* from the mounting rotation.
*
* As a note:
* orientation / mountingOrientation = transform
* mountingOrientation * transform = orientation
* orientation / mountingOrientation_ = transform
* mountingOrientation_ * transform = orientation
*/
Transform transform = *orientation / mountingOrientation;
Transform transform = *orientation / mountingOrientation_;
/*
* If transform contains any Transpose we cannot do it, so adjust
* 'orientation' to report the image native orientation and return Identity.
*/
if (!!(transform & Transform::Transpose)) {
*orientation = mountingOrientation;
*orientation = mountingOrientation_;
return Transform::Identity;
}