-spl::shared_ptr<core::frame_producer> create_producer(const spl::shared_ptr<frame_factory>& my_frame_factory, const video_format_desc& format_desc, const std::vector<std::wstring>& params)
-{
- auto producer = do_create_producer(my_frame_factory, format_desc, params);
+draw_frame do_create_thumbnail_frame(
+ const frame_producer_dependencies& dependencies,
+ const std::wstring& media_file,
+ const std::vector<thumbnail_producer_t>& thumbnail_producers)
+{
+ for (auto& thumbnail_producer : thumbnail_producers)
+ {
+ auto frame = thumbnail_producer(dependencies, media_file);
+
+ if (frame != draw_frame::empty())
+ return frame;
+ }
+
+ return draw_frame::empty();
+}
+
+draw_frame frame_producer_registry::create_thumbnail(const frame_producer_dependencies& dependencies, const std::wstring& media_file) const
+{
+ auto& thumbnail_producers = impl_->thumbnail_producers;
+ std::vector<std::wstring> params;
+ params.push_back(media_file);
+
+ auto fill_frame = do_create_thumbnail_frame(dependencies, media_file, thumbnail_producers);
+ auto key_frame = do_create_thumbnail_frame(dependencies, media_file + L"_A", thumbnail_producers);
+
+ if (key_frame == draw_frame::empty())
+ key_frame = do_create_thumbnail_frame(dependencies, media_file + L"_ALPHA", thumbnail_producers);
+
+ if (fill_frame != draw_frame::empty() && key_frame != draw_frame::empty())
+ return draw_frame::mask(fill_frame, key_frame);
+
+ return fill_frame;
+}
+
+spl::shared_ptr<core::frame_producer> frame_producer_registry::create_producer(const frame_producer_dependencies& dependencies, const std::vector<std::wstring>& params) const
+{
+ auto& producer_factories = impl_->producer_factories;
+ auto producer = do_create_producer(dependencies, params, producer_factories);