+const spl::shared_ptr<frame_producer>& frame_producer::empty() // nothrow\r
+{\r
+\r
+struct empty_frame_producer : public frame_producer\r
+{\r
+ virtual spl::shared_ptr<draw_frame> receive(int){return draw_frame::empty();}\r
+ virtual spl::shared_ptr<draw_frame> last_frame() const{return draw_frame::empty();}\r
+ virtual void set_frame_factory(const spl::shared_ptr<frame_factory>&){}\r
+ virtual uint32_t nb_frames() const {return 0;}\r
+ virtual std::wstring print() const { return L"empty";}\r
+ virtual void subscribe(const monitor::observable::observer_ptr& o){}\r
+ virtual void unsubscribe(const monitor::observable::observer_ptr& o){} \r
+ virtual std::wstring name() const {return L"empty";}\r
+ \r
+ virtual boost::property_tree::wptree info() const override\r
+ {\r
+ boost::property_tree::wptree info;\r
+ info.add(L"type", L"empty-producer");\r
+ return info;\r
+ }\r
+};\r
+\r
+ static spl::shared_ptr<frame_producer> producer = spl::make_shared<empty_frame_producer>();\r
+ return producer;\r
+} \r
+\r
+class producer_proxy : public frame_producer\r
+{ \r
+ std::shared_ptr<frame_producer> producer_;\r
+public:\r
+ producer_proxy(spl::shared_ptr<frame_producer>&& producer) \r
+ : producer_(std::move(producer))\r
+ {\r
+ CASPAR_LOG(info) << producer_->print() << L" Initialized.";\r
+ }\r
+\r
+ virtual ~producer_proxy()\r
+ { \r
+ static tbb::atomic<int> counter = tbb::atomic<int>();\r
+ \r
+ ++counter;\r
+ CASPAR_VERIFY(counter < 32);\r
+ \r
+ auto producer = new spl::shared_ptr<frame_producer>(std::move(producer_));\r
+ async([=]\r
+ {\r
+ std::unique_ptr<spl::shared_ptr<frame_producer>> pointer_guard(producer);\r
+ auto str = (*producer)->print();\r
+ try\r
+ {\r
+ if(!producer->unique())\r
+ CASPAR_LOG(trace) << str << L" Not destroyed on asynchronous destruction thread: " << producer->use_count();\r
+ else\r
+ CASPAR_LOG(trace) << str << L" Destroying on asynchronous destruction thread.";\r
+ }\r
+ catch(...){}\r
+ \r
+ CASPAR_LOG(trace) << str << L" Uninitializing.";\r
+ pointer_guard.reset();\r
+ CASPAR_LOG(info) << str << L" Uninitialized.";\r
+\r
+ --counter;\r
+ }); \r
+ }\r
+ \r
+ virtual spl::shared_ptr<draw_frame> receive(int flags) override {return producer_->receive(flags);}\r
+ virtual spl::shared_ptr<draw_frame> last_frame() const override {return producer_->last_frame();}\r
+ virtual std::wstring print() const override {return producer_->print();}\r
+ virtual std::wstring name() const override {return producer_->name();}\r
+ virtual boost::property_tree::wptree info() const override {return producer_->info();}\r
+ virtual boost::unique_future<std::wstring> call(const std::wstring& str) override {return producer_->call(str);}\r
+ virtual void leading_producer(const spl::shared_ptr<frame_producer>& producer) override {return producer_->leading_producer(producer);}\r
+ virtual uint32_t nb_frames() const override {return producer_->nb_frames();}\r
+ virtual void subscribe(const monitor::observable::observer_ptr& o) {return producer_->subscribe(o);}\r
+ virtual void unsubscribe(const monitor::observable::observer_ptr& o) {return producer_->unsubscribe(o);}\r
+};\r
+\r
+spl::shared_ptr<core::frame_producer> wrap_producer(spl::shared_ptr<core::frame_producer> producer)\r
+{\r
+ return spl::make_shared<producer_proxy>(std::move(producer));\r
+}\r
+\r
+spl::shared_ptr<core::frame_producer> do_create_producer(const spl::shared_ptr<frame_factory>& my_frame_factory, const std::vector<std::wstring>& params)\r