[PATCH v4 4/7] pipeline: rpi: Introduce CameraData::CropParams

[Naushir Patuck]

In preparation for assigning separate crop windows for each stream, add
a new CropParams structure that stores the existing ispCrop_ and
ispMinCropSize_ as fields. Use a new std::map to store a CropParams
structure where the map key is the index of the stream configuration in
the CameraConfiguration vector.

At preset, only a single CropParams structure will be set at key == 0 to
preserve the existing crop handling logic.

Signed-off-by: Naushir Patuck <naush at raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi at ideasonboard.com>
---
 .../pipeline/rpi/common/pipeline_base.cpp     | 28 +++++++++++++------
 .../pipeline/rpi/common/pipeline_base.h       | 17 +++++++++--
 src/libcamera/pipeline/rpi/vc4/vc4.cpp        | 12 ++++++--
 3 files changed, 43 insertions(+), 14 deletions(-)

diff --git a/src/libcamera/pipeline/rpi/common/pipeline_base.cpp b/src/libcamera/pipeline/rpi/common/pipeline_base.cpp
index 2de6111bacfd..220c7b962280 100644
--- a/src/libcamera/pipeline/rpi/common/pipeline_base.cpp
+++ b/src/libcamera/pipeline/rpi/common/pipeline_base.cpp
@@ -533,6 +533,7 @@ int PipelineHandlerBase::configure(Camera *camera, CameraConfiguration *config)
 	 * Platform specific internal stream configuration. This also assigns
 	 * external streams which get configured below.
 	 */
+	data->cropParams_.clear();
 	ret = data->platformConfigure(rpiConfig);
 	if (ret)
 		return ret;
@@ -561,10 +562,14 @@ int PipelineHandlerBase::configure(Camera *camera, CameraConfiguration *config)
 	for (auto const &c : result.controlInfo)
 		ctrlMap.emplace(c.first, c.second);
 
-	/* Add the ScalerCrop control limits based on the current mode. */
-	Rectangle ispMinCrop = data->scaleIspCrop(Rectangle(data->ispMinCropSize_));
-	ctrlMap[&controls::ScalerCrop] = ControlInfo(ispMinCrop, data->sensorInfo_.analogCrop,
-						     data->scaleIspCrop(data->ispCrop_));
+	const auto cropParamsIt = data->cropParams_.find(0);
+	if (cropParamsIt != data->cropParams_.end()) {
+		const CameraData::CropParams &cropParams = cropParamsIt->second;
+		/* Add the ScalerCrop control limits based on the current mode. */
+		Rectangle ispMinCrop = data->scaleIspCrop(Rectangle(cropParams.ispMinCropSize));
+		ctrlMap[&controls::ScalerCrop] = ControlInfo(ispMinCrop, data->sensorInfo_.analogCrop,
+							     data->scaleIspCrop(cropParams.ispCrop));
+	}
 
 	data->controlInfo_ = ControlInfoMap(std::move(ctrlMap), result.controlInfo.idmap());
 
@@ -1291,8 +1296,10 @@ Rectangle CameraData::scaleIspCrop(const Rectangle &ispCrop) const
 void CameraData::applyScalerCrop(const ControlList &controls)
 {
 	const auto &scalerCrop = controls.get<Rectangle>(controls::ScalerCrop);
-	if (scalerCrop) {
+	const auto cropParamsIt = cropParams_.find(0);
+	if (scalerCrop && cropParamsIt != cropParams_.end()) {
 		Rectangle nativeCrop = *scalerCrop;
+		CropParams &cropParams = cropParamsIt->second;
 
 		if (!nativeCrop.width || !nativeCrop.height)
 			nativeCrop = { 0, 0, 1, 1 };
@@ -1308,12 +1315,12 @@ void CameraData::applyScalerCrop(const ControlList &controls)
 		 * 2. With the same mid-point, if possible.
 		 * 3. But it can't go outside the sensor area.
 		 */
-		Size minSize = ispMinCropSize_.expandedToAspectRatio(nativeCrop.size());
+		Size minSize = cropParams.ispMinCropSize.expandedToAspectRatio(nativeCrop.size());
 		Size size = ispCrop.size().expandedTo(minSize);
 		ispCrop = size.centeredTo(ispCrop.center()).enclosedIn(Rectangle(sensorInfo_.outputSize));
 
-		if (ispCrop != ispCrop_) {
-			ispCrop_ = ispCrop;
+		if (ispCrop != cropParams.ispCrop) {
+			cropParams.ispCrop = ispCrop;
 			platformSetIspCrop(ispCrop);
 		}
 	}
@@ -1471,7 +1478,10 @@ void CameraData::fillRequestMetadata(const ControlList &bufferControls, Request
 	request->metadata().set(controls::SensorTimestamp,
 				bufferControls.get(controls::SensorTimestamp).value_or(0));
 
-	request->metadata().set(controls::ScalerCrop, scaleIspCrop(ispCrop_));
+	const auto cropParamsIt = cropParams_.find(0);
+	if (cropParamsIt != cropParams_.end())
+		request->metadata().set(controls::ScalerCrop,
+					scaleIspCrop(cropParamsIt->second.ispCrop));
 }
 
 } /* namespace libcamera */
diff --git a/src/libcamera/pipeline/rpi/common/pipeline_base.h b/src/libcamera/pipeline/rpi/common/pipeline_base.h
index d65b695c30b5..88bd603193f4 100644
--- a/src/libcamera/pipeline/rpi/common/pipeline_base.h
+++ b/src/libcamera/pipeline/rpi/common/pipeline_base.h
@@ -133,8 +133,21 @@ public:
 
 	/* For handling digital zoom. */
 	IPACameraSensorInfo sensorInfo_;
-	Rectangle ispCrop_; /* crop in ISP (camera mode) pixels */
-	Size ispMinCropSize_;
+
+	struct CropParams {
+		CropParams(Rectangle ispCrop_, Size ispMinCropSize_)
+			: ispCrop(ispCrop_), ispMinCropSize(ispMinCropSize_)
+		{
+		}
+
+		/* Crop in ISP (camera mode) pixels */
+		Rectangle ispCrop;
+		/* Minimum crop size in ISP output pixels */
+		Size ispMinCropSize;
+	};
+
+	/* Mapping of CropParams keyed by the output stream order in CameraConfiguration */
+	std::map<unsigned int, CropParams> cropParams_;
 
 	unsigned int dropFrameCount_;
 
diff --git a/src/libcamera/pipeline/rpi/vc4/vc4.cpp b/src/libcamera/pipeline/rpi/vc4/vc4.cpp
index 0ea032293bc9..8080f55a1cf4 100644
--- a/src/libcamera/pipeline/rpi/vc4/vc4.cpp
+++ b/src/libcamera/pipeline/rpi/vc4/vc4.cpp
@@ -702,13 +702,19 @@ int Vc4CameraData::platformConfigure(const RPi::RPiCameraConfiguration *rpiConfi
 	/* Figure out the smallest selection the ISP will allow. */
 	Rectangle testCrop(0, 0, 1, 1);
 	isp_[Isp::Input].dev()->setSelection(V4L2_SEL_TGT_CROP, &testCrop);
-	ispMinCropSize_ = testCrop.size();
 
 	/* Adjust aspect ratio by providing crops on the input image. */
 	Size size = unicamFormat.size.boundedToAspectRatio(maxSize);
-	ispCrop_ = size.centeredTo(Rectangle(unicamFormat.size).center());
+	Rectangle ispCrop = size.centeredTo(Rectangle(unicamFormat.size).center());
 
-	platformSetIspCrop(ispCrop_);
+	platformSetIspCrop(ispCrop);
+	/*
+	 * Set the scaler crop to the value we are using (scaled to native sensor
+	 * coordinates).
+	 */
+	cropParams_.emplace(std::piecewise_construct,
+			    std::forward_as_tuple(0),
+			    std::forward_as_tuple(ispCrop, testCrop.size()));
 
 	return 0;
 }
-- 
2.34.1