3 files changed, 13 insertions, 0 deletions
diff --git a/include/libcamera/internal/device_enumerator.h b/include/libcamera/internal/device_enumerator.h
index db3532a9..4bc3a27d 100644
--- a/include/libcamera/internal/device_enumerator.h
+++ b/include/libcamera/internal/device_enumerator.h
@@ -42,6 +42,7 @@ public:
 	virtual int enumerate() = 0;
 
 	std::shared_ptr<MediaDevice> search(const DeviceMatch &dm);
+	std::shared_ptr<MediaDevice> searchNonExclusive(const DeviceMatch &dm);
 
 	Signal<> devicesAdded;
 
diff --git a/include/libcamera/internal/media_device.h b/include/libcamera/internal/media_device.h
index 992184ed..bcbedf5c 100644
--- a/include/libcamera/internal/media_device.h
+++ b/include/libcamera/internal/media_device.h
@@ -29,9 +29,14 @@ public:
 	~MediaDevice();
 
 	bool acquire();
+	bool acquireNonExclusive();
 	void release();
 	bool busy() const { return acquired_; }
 
+	/* HACKS */
+	unsigned int get() { return ++users_; }
+	unsigned int put() { return --users_; }
+
 	bool lock();
 	void unlock();
 
@@ -55,6 +60,8 @@ public:
 	int disableLinks();
 
 	int fd() const { return fd_.get(); }
+	int fd(unsigned int context) const { return fds_[context - 1].get(); }
+	unsigned int numContexts() const { return fds_.size(); }
 
 	Signal<> disconnected;
 
@@ -63,6 +70,7 @@ protected:
 
 private:
 	int open();
+	int openMultiple();
 	void close();
 
 	MediaObject *object(unsigned int id);
@@ -86,8 +94,10 @@ private:
 	unsigned int hwRevision_;
 
 	UniqueFD fd_;
+	std::vector<UniqueFD> fds_;
 	bool valid_;
 	bool acquired_;
+	unsigned int users_;
 
 	std::map<unsigned int, MediaObject *> objects_;
 	std::vector<MediaEntity *> entities_;
diff --git a/include/libcamera/internal/pipeline_handler.h b/include/libcamera/internal/pipeline_handler.h
index 746a34f8..7c316cb9 100644
--- a/include/libcamera/internal/pipeline_handler.h
+++ b/include/libcamera/internal/pipeline_handler.h
@@ -44,6 +44,8 @@ public:
 	virtual bool match(DeviceEnumerator *enumerator) = 0;
 	MediaDevice *acquireMediaDevice(DeviceEnumerator *enumerator,
 					const DeviceMatch &dm);
+	MediaDevice *acquireMediaDeviceNonExclusive(DeviceEnumerator *enumerator,
+						    const DeviceMatch &dm);
 
 	bool acquire();
 	void release(Camera *camera);