libcamera: pipeline: rkisp1: Expose self path stream

Expose the self stream to applications and prefers it for the viewfinder
and video roles as it can be extended to produce RGB. Keep preferring
the main path for still capture as it could be extended to support RAW
formats which makes most sense for still capture.

With this change the self path becomes available to applications and a
camera backed by this pipeline can produce two streams simultaneously.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 52 insertions, 11 deletions

diff --git a/src/libcamera/pipeline/rkisp1/rkisp1.cpp b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
index 8aae1697..acd946d1 100644
--- a/src/libcamera/pipeline/rkisp1/rkisp1.cpp
+++ b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
@@ -710,21 +710,59 @@ CameraConfiguration *PipelineHandlerRkISP1::generateConfiguration(Camera *camera
 {
 	RkISP1CameraData *data = cameraData(camera);
 	CameraConfiguration *config = new RkISP1CameraConfiguration(camera, data);
-
 	if (roles.empty())
 		return config;
 
-	std::map<PixelFormat, std::vector<SizeRange>> streamFormats;
-	for (const PixelFormat &format : RKISP1_RSZ_MP_FORMATS)
-		streamFormats[format] =
-			{ { RKISP1_RSZ_MP_SRC_MIN, data->sensor_->resolution() } };
+	bool mainPathAvailable = true;
+	bool selfPathAvailable = true;
+	for (const StreamRole role : roles) {
+		bool useMainPath;
+
+		switch (role) {
+		case StreamRole::StillCapture: {
+			useMainPath = mainPathAvailable;
+			break;
+		}
+		case StreamRole::Viewfinder:
+		case StreamRole::VideoRecording: {
+			useMainPath = !selfPathAvailable;
+			break;
+		}
+		default:
+			LOG(RkISP1, Warning)
+				<< "Requested stream role not supported: " << role;
+			delete config;
+			return nullptr;
+		}
+
+		std::map<PixelFormat, std::vector<SizeRange>> streamFormats;
+		Size maxResolution = data->sensor_->resolution();
+		if (useMainPath) {
+			mainPathAvailable = false;
+			maxResolution.boundTo(RKISP1_RSZ_MP_SRC_MAX);
+			for (const PixelFormat &format : RKISP1_RSZ_MP_FORMATS)
+				streamFormats[format] = { {
+					RKISP1_RSZ_MP_SRC_MIN,
+					maxResolution,
+				} };
+		} else {
+			selfPathAvailable = false;
+			maxResolution.boundTo(RKISP1_RSZ_SP_SRC_MAX);
+			for (const PixelFormat &format : RKISP1_RSZ_SP_FORMATS)
+				streamFormats[format] = { {
+					RKISP1_RSZ_SP_SRC_MIN,
+					maxResolution,
+				} };
+		}
 
-	StreamFormats formats(streamFormats);
-	StreamConfiguration cfg(formats);
-	cfg.pixelFormat = formats::NV12;
-	cfg.size = data->sensor_->resolution();
+		StreamFormats formats(streamFormats);
+		StreamConfiguration cfg(formats);
+		cfg.pixelFormat = formats::NV12;
+		cfg.size = maxResolution;
+		cfg.bufferCount = 4;
 
-	config->addConfiguration(cfg);
+		config->addConfiguration(cfg);
+	}
 
 	config->validate();
 
@@ -1212,7 +1250,10 @@ int PipelineHandlerRkISP1::createCamera(MediaEntity *sensor)
 	if (ret)
 		return ret;
 
-	std::set<Stream *> streams{ &data->mainPathStream_ };
+	std::set<Stream *> streams{
+		&data->mainPathStream_,
+		&data->selfPathStream_,
+	};
 	std::shared_ptr<Camera> camera =
 		Camera::create(this, data->sensor_->id(), streams);
 	registerCamera(std::move(camera), std::move(data));