[v1,27/33] libcamera: rkisp1: Handle requested orientation using dewarper
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Message ID 20250930122726.1837524-28-stefan.klug@ideasonboard.com
State New
Headers show
Series
  • Full dewarper support on imx8mp
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Commit Message

Stefan Klug Sept. 30, 2025, 12:26 p.m. UTC
When the dewarper is present it can handle arbitrary orientations
specified in the requested camera configuration. In that case handle all
transformations inside the dewarper (even if the sensor supports some of
them) because that makes it easier to handle coordinates for lens
dewarping inside the dewarper.

Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
---
 src/libcamera/pipeline/rkisp1/rkisp1.cpp | 79 +++++++++++++++++++-----
 1 file changed, 63 insertions(+), 16 deletions(-)

Patch
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diff --git a/src/libcamera/pipeline/rkisp1/rkisp1.cpp b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
index e8902ce66b70..1046930857e1 100644
--- a/src/libcamera/pipeline/rkisp1/rkisp1.cpp
+++ b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
@@ -550,11 +550,6 @@  CameraConfiguration::Status RkISP1CameraConfiguration::validate()
 		status = Adjusted;
 	}
 
-	Orientation requestedOrientation = orientation;
-	combinedTransform_ = data_->sensor_->computeTransform(&orientation);
-	if (orientation != requestedOrientation)
-		status = Adjusted;
-
 	/*
 	 * Simultaneous capture of raw and processed streams isn't possible. If
 	 * there is any raw stream, cap the number of streams to one.
@@ -570,6 +565,12 @@  CameraConfiguration::Status RkISP1CameraConfiguration::validate()
 		}
 	}
 
+	/*
+	 * If the dewarper supports orientation adjustments, apply that completely
+	 * there. Even if the sensor supports flips, it is beneficial to do that
+	 * in the dewarper so that lens dewarping happens on the unflipped image
+	 */
+	bool transposeAfterIsp = false;
 	bool useDewarper = false;
 	if (pipe->dewarper_) {
 		/*
@@ -580,6 +581,14 @@  CameraConfiguration::Status RkISP1CameraConfiguration::validate()
 			     PixelFormatInfo::ColourEncodingRAW;
 		if (!isRaw)
 			useDewarper = true;
+		combinedTransform_ = orientation / data_->sensor_->mountingOrientation();
+		if (!!(combinedTransform_ & Transform::Transpose))
+			transposeAfterIsp = true;
+	} else {
+		Orientation requestedOrientation = orientation;
+		combinedTransform_ = data_->sensor_->computeTransform(&orientation);
+		if (orientation != requestedOrientation)
+			status = Adjusted;
 	}
 
 	/*
@@ -610,6 +619,9 @@  CameraConfiguration::Status RkISP1CameraConfiguration::validate()
 		    (expectedStatus == Valid && ret == Adjusted))
 			return false;
 
+		if (transposeAfterIsp)
+			tryCfg.size.transpose();
+
 		if (useDewarper) {
 			/*
 			 * The dewarper output is independent of the ISP path.
@@ -694,6 +706,9 @@  CameraConfiguration::Status RkISP1CameraConfiguration::validate()
 		maxSize = std::max(maxSize, cfg.size);
 	}
 
+	if (transposeAfterIsp)
+		maxSize.transpose();
+
 	std::vector<unsigned int> mbusCodes;
 
 	if (rawFormat.isValid()) {
@@ -739,6 +754,22 @@  PipelineHandlerRkISP1::generateConfiguration(Camera *camera,
 	if (roles.empty())
 		return config;
 
+	Transform transform = Transform::Identity;
+	Size previewSize = kRkISP1PreviewSize;
+	bool transposeAfterIsp = false;
+	if (data->canUseDewarper_) {
+		transform = Orientation::Rotate0 / data->sensor_->mountingOrientation();
+		if (!!(transform & Transform::Transpose))
+			transposeAfterIsp = true;
+	}
+
+	/*
+	 * In case of a transpose transform we need to create a path for the
+	 * transposed size.
+	 */
+	if (transposeAfterIsp)
+		previewSize.transpose();
+
 	/*
 	 * As the ISP can't output different color spaces for the main and self
 	 * path, pick a sensible default color space based on the role of the
@@ -767,7 +798,7 @@  PipelineHandlerRkISP1::generateConfiguration(Camera *camera,
 			if (!colorSpace)
 				colorSpace = ColorSpace::Sycc;
 
-			size = kRkISP1PreviewSize;
+			size = previewSize;
 			break;
 
 		case StreamRole::VideoRecording:
@@ -775,7 +806,7 @@  PipelineHandlerRkISP1::generateConfiguration(Camera *camera,
 			if (!colorSpace)
 				colorSpace = ColorSpace::Rec709;
 
-			size = kRkISP1PreviewSize;
+			size = previewSize;
 			break;
 
 		case StreamRole::Raw:
@@ -817,6 +848,9 @@  PipelineHandlerRkISP1::generateConfiguration(Camera *camera,
 		if (!cfg.pixelFormat.isValid())
 			return nullptr;
 
+		if (transposeAfterIsp && role != StreamRole::Raw)
+			cfg.size.transpose();
+
 		cfg.colorSpace = colorSpace;
 		cfg.bufferCount = kRkISP1MinBufferCount;
 		config->addConfiguration(cfg);
@@ -839,6 +873,19 @@  int PipelineHandlerRkISP1::configure(Camera *camera, CameraConfiguration *c)
 	if (ret)
 		return ret;
 
+	const PixelFormat &streamFormat = config->at(0).pixelFormat;
+	const PixelFormatInfo &info = PixelFormatInfo::info(streamFormat);
+	isRaw_ = info.colourEncoding == PixelFormatInfo::ColourEncodingRAW;
+	data->usesDewarper_ = data->canUseDewarper_ && !isRaw_;
+
+	Transform transform = config->combinedTransform();
+	bool transposeAfterIsp = false;
+	if (data->usesDewarper_) {
+		if (!!(transform & Transform::Transpose))
+			transposeAfterIsp = true;
+		transform = Transform::Identity;
+	}
+
 	/*
 	 * Configure the format on the sensor output and propagate it through
 	 * the pipeline.
@@ -848,10 +895,10 @@  int PipelineHandlerRkISP1::configure(Camera *camera, CameraConfiguration *c)
 
 	if (config->sensorConfig)
 		ret = sensor->applyConfiguration(*config->sensorConfig,
-						 config->combinedTransform(),
+						 transform,
 						 &format);
 	else
-		ret = sensor->setFormat(&format, config->combinedTransform());
+		ret = sensor->setFormat(&format, transform);
 
 	if (ret < 0)
 		return ret;
@@ -878,10 +925,6 @@  int PipelineHandlerRkISP1::configure(Camera *camera, CameraConfiguration *c)
 		<< " crop " << inputCrop;
 
 	Rectangle outputCrop = inputCrop;
-	const PixelFormat &streamFormat = config->at(0).pixelFormat;
-	const PixelFormatInfo &info = PixelFormatInfo::info(streamFormat);
-	isRaw_ = info.colourEncoding == PixelFormatInfo::ColourEncodingRAW;
-	data->usesDewarper_ = dewarper_ && !isRaw_;
 
 	/* YUYV8_2X8 is required on the ISP source path pad for YUV output. */
 	if (!isRaw_)
@@ -973,15 +1016,19 @@  int PipelineHandlerRkISP1::configure(Camera *camera, CameraConfiguration *c)
 					inputCrop, sensorInfo.analogCrop);
 				auto &vertexMap = dewarper_->vertexMap(cfg.stream());
 				vertexMap.setSensorCrop(sensorCrop);
+				vertexMap.setTransform(config->combinedTransform());
 				data->properties_.set(properties::ScalerCropMaximum, sensorCrop);
 
 				/*
 				 * Apply a default sensor crop that keeps the
 				 * aspect ratio.
 				 */
-				Size crop = format.size.boundedToAspectRatio(cfg.size);
-				vertexMap.setScalerCrop(crop.centeredTo(
-					Rectangle(format.size).center()));
+				Size size = cfg.size;
+				if (transposeAfterIsp)
+					size.transpose();
+				size = sensorCrop.size().boundedToAspectRatio(size);
+				vertexMap.setScalerCrop(
+					size.centeredTo(sensorCrop.center()));
 			}
 
 			ret = mainPath_.configure(ispCfg, format);