libcamera: CameraManager: Remove ::get(dev_t)

The CameraManager::get(dev_t) implementation was provided only for the
V4L2 Adaptation layer. This has now been replaced with the use of the
public SystemDevices property.

Remove the deprecated function entirely, along with the camerasByDevnum_
map which was only used to support this functionality.

This is a clear (and intentional) breakage in both the API and ABI.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

3 files changed, 1 insertions, 45 deletions

diff --git a/include/libcamera/camera_manager.h b/include/libcamera/camera_manager.h
index 9767acc4..1a891cac 100644
--- a/include/libcamera/camera_manager.h
+++ b/include/libcamera/camera_manager.h
@@ -32,7 +32,6 @@ public:
 
 	std::vector<std::shared_ptr<Camera>> cameras() const;
 	std::shared_ptr<Camera> get(const std::string &id);
-	std::shared_ptr<Camera> get(dev_t devnum);
 
 	static const std::string &version() { return version_; }
 
diff --git a/include/libcamera/internal/camera_manager.h b/include/libcamera/internal/camera_manager.h
index e4f5aaf4..33ebe069 100644
--- a/include/libcamera/internal/camera_manager.h
+++ b/include/libcamera/internal/camera_manager.h
@@ -50,11 +50,10 @@ private:
 	 * This mutex protects
 	 *
 	 * - initialized_ and status_ during initialization
-	 * - cameras_ and camerasByDevnum_ after initialization
+	 * - cameras_ after initialization
 	 */
 	mutable Mutex mutex_;
 	std::vector<std::shared_ptr<Camera>> cameras_ LIBCAMERA_TSA_GUARDED_BY(mutex_);
-	std::map<dev_t, std::weak_ptr<Camera>> camerasByDevnum_ LIBCAMERA_TSA_GUARDED_BY(mutex_);
 
 	ConditionVariable cv_;
 	bool initialized_ LIBCAMERA_TSA_GUARDED_BY(mutex_);
diff --git a/src/libcamera/camera_manager.cpp b/src/libcamera/camera_manager.cpp
index 7c65bb99..355f3ada 100644
--- a/src/libcamera/camera_manager.cpp
+++ b/src/libcamera/camera_manager.cpp
@@ -178,15 +178,9 @@ void CameraManager::Private::addCamera(std::shared_ptr<Camera> camera)
 		}
 	}
 
-	auto devnums = camera->properties()
-			       .get(properties::SystemDevices)
-			       .value_or(Span<int64_t>{});
-
 	cameras_.push_back(std::move(camera));
 
 	unsigned int index = cameras_.size() - 1;
-	for (dev_t devnum : devnums)
-		camerasByDevnum_[devnum] = cameras_[index];
 
 	/* Report the addition to the public signal */
 	CameraManager *const o = LIBCAMERA_O_PTR();
@@ -219,13 +213,6 @@ void CameraManager::Private::removeCamera(std::shared_ptr<Camera> camera)
 	LOG(Camera, Debug)
 		<< "Unregistering camera '" << camera->id() << "'";
 
-	auto iter_d = std::find_if(camerasByDevnum_.begin(), camerasByDevnum_.end(),
-				   [camera](const std::pair<dev_t, std::weak_ptr<Camera>> &p) {
-					   return p.second.lock().get() == camera.get();
-				   });
-	if (iter_d != camerasByDevnum_.end())
-		camerasByDevnum_.erase(iter_d);
-
 	cameras_.erase(iter);
 
 	/* Report the removal to the public signal */
@@ -367,35 +354,6 @@ std::shared_ptr<Camera> CameraManager::get(const std::string &id)
 }
 
 /**
- * \brief Retrieve a camera based on device number
- * \param[in] devnum Device number of camera to get
- *
- * This function is meant solely for the use of the V4L2 compatibility
- * layer, to map device nodes to Camera instances. Applications shall
- * not use it and shall instead retrieve cameras by name.
- *
- * Before calling this function the caller is responsible for ensuring that
- * the camera manager is running.
- *
- * \context This function is \threadsafe.
- *
- * \return Shared pointer to Camera object, which is empty if the camera is
- * not found
- */
-std::shared_ptr<Camera> CameraManager::get(dev_t devnum)
-{
-	Private *const d = _d();
-
-	MutexLocker locker(d->mutex_);
-
-	auto iter = d->camerasByDevnum_.find(devnum);
-	if (iter == d->camerasByDevnum_.end())
-		return nullptr;
-
-	return iter->second.lock();
-}
-
-/**
  * \var CameraManager::cameraAdded
  * \brief Notify of a new camera added to the system
  *