very, very simple WP with midi CC out

include/libremidi/shared_context.hpp

@@ -0,0 +1,33 @@
+#pragma once
+#include <libremidi/api.hpp>
+#include <libremidi/config.hpp>
+
+#include <any>
+
+namespace libremidi
+{
+
+class shared_context
+{
+public:
+  shared_context() = default;
+  virtual ~shared_context() = default;
+  shared_context(const shared_context&) = delete;
+  shared_context(shared_context&&) = delete;
+  shared_context& operator=(const shared_context&) = delete;
+  shared_context& operator=(shared_context&&) = delete;
+
+  virtual void start_processing() = 0;
+  virtual void stop_processing() = 0;
+};
+
+struct shared_configurations
+{
+  std::shared_ptr<shared_context> context;
+  std::any observer, in, out;
+};
+
+LIBREMIDI_EXPORT
+shared_configurations create_shared_context(libremidi::API api, std::string_view client_name);
+
+}