feat: generic camera stream support for http snapshot and rtsp

src/slic3r/GUI/IMediaController.hpp

@@ -0,0 +1,35 @@
+#pragma once
+
+#include <wx/mediactrl.h>
+#include <wx/uri.h>
+
+#include <slic3r/Utils/IPrinterAgent.hpp>
+
+namespace Slic3r { namespace GUI {
+
+class IMediaController
+{
+public:
+    virtual void Load(wxURI url) = 0;
+
+    // The default keeps existing media controllers unaware of camera-specific modes.
+    virtual void Load(wxURI url, CameraStreamMode mode)
+    {
+        (void) mode;
+        Load(url);
+    }
+
+    virtual void Play() = 0;
+
+    virtual void Stop() = 0;
+
+    virtual wxMediaState GetState() { return wxMediaState{}; }
+
+    virtual int GetLastError() const { return {}; };
+
+    virtual wxSize GetVideoSize() const { return {}; };
+
+private:
+};
+
+}} // namespace Slic3r::GUI