libcamera: request: Make Stream pointer const

The Stream pointer just acts as a key in the Request object. There is no
good use-case to modify a stream from a pointer retrieved from the
Request, make it const. This allows pipeline handlers to better express
that the Stream pointer is retrieved in a Request should just be treated
as a key.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libcamera/camera.cpp b/src/libcamera/camera.cpp
index 820fa1e3..afdd4775 100644
--- a/src/libcamera/camera.cpp
+++ b/src/libcamera/camera.cpp
@@ -279,7 +279,7 @@ public:
 	std::shared_ptr<PipelineHandler> pipe_;
 	std::string id_;
 	std::set<Stream *> streams_;
-	std::set<Stream *> activeStreams_;
+	std::set<const Stream *> activeStreams_;
 
 private:
 	bool disconnected_;
@@ -889,7 +889,7 @@ int Camera::queueRequest(Request *request)
 	}
 
 	for (auto const &it : request->buffers()) {
-		Stream *stream = it.first;
+		const Stream *stream = it.first;
 
 		if (p_->activeStreams_.find(stream) == p_->activeStreams_.end()) {
 			LOG(Camera, Error) << "Invalid request";