2 #define _CEF_CAPTURE_H 1
4 // CEFCapture represents a single CEF virtual capture card (usually, there would only
5 // be one globally), similar to FFmpegCapture. It owns a CefBrowser, which calls
6 // OnPaint() back every time it has a frame. Note that it runs asynchronously;
7 // there's no way to get frame-perfect sync.
12 #include <condition_variable>
22 #include <cef_client.h>
24 #include <cef_render_handler.h>
26 #include <bmusb/bmusb.h>
32 // A helper class for CEFCapture to proxy information to CEF, without becoming
33 // CEF-refcounted itself.
34 class NageruCEFClient : public CefClient, public CefRenderHandler
37 NageruCEFClient(int width, int height, CEFCapture *parent)
38 : width(width), height(height), parent(parent) {}
40 CefRefPtr<CefRenderHandler> GetRenderHandler() override
45 void OnPaint(CefRefPtr<CefBrowser> browser, PaintElementType type, const RectList &dirtyRects, const void *buffer, int width, int height) override;
47 bool GetViewRect(CefRefPtr<CefBrowser> browser, CefRect &rect);
53 IMPLEMENT_REFCOUNTING(NageruCEFClient);
56 class CEFCapture : public bmusb::CaptureInterface
59 CEFCapture(const std::string &url, unsigned width, unsigned height);
62 void set_card_index(int card_index)
64 this->card_index = card_index;
67 int get_card_index() const
72 void set_url(const std::string &url);
75 void OnPaint(const void *buffer, int width, int height);
78 void set_video_frame_allocator(bmusb::FrameAllocator *allocator) override
80 video_frame_allocator = allocator;
81 if (owned_video_frame_allocator.get() != allocator) {
82 owned_video_frame_allocator.reset();
86 bmusb::FrameAllocator *get_video_frame_allocator() override
88 return video_frame_allocator;
91 // Does not take ownership.
92 void set_audio_frame_allocator(bmusb::FrameAllocator *allocator) override
96 bmusb::FrameAllocator *get_audio_frame_allocator() override
101 void set_frame_callback(bmusb::frame_callback_t callback) override
103 frame_callback = callback;
106 void set_dequeue_thread_callbacks(std::function<void()> init, std::function<void()> cleanup) override
108 dequeue_init_callback = init;
109 dequeue_cleanup_callback = cleanup;
110 has_dequeue_callbacks = true;
113 std::string get_description() const override
118 void configure_card() override;
119 void start_bm_capture() override;
120 void stop_dequeue_thread() override;
121 bool get_disconnected() const override { return false; }
123 std::set<bmusb::PixelFormat> get_available_pixel_formats() const override
125 return std::set<bmusb::PixelFormat>{ bmusb::PixelFormat_8BitBGRA };
128 void set_pixel_format(bmusb::PixelFormat pixel_format) override
130 assert(pixel_format == bmusb::PixelFormat_8BitBGRA);
133 bmusb::PixelFormat get_current_pixel_format() const
135 return bmusb::PixelFormat_8BitBGRA;
138 std::map<uint32_t, bmusb::VideoMode> get_available_video_modes() const override;
139 void set_video_mode(uint32_t video_mode_id) override;
140 uint32_t get_current_video_mode() const override { return 0; }
142 std::map<uint32_t, std::string> get_available_video_inputs() const override;
143 void set_video_input(uint32_t video_input_id) override;
144 uint32_t get_current_video_input() const override { return 0; }
146 std::map<uint32_t, std::string> get_available_audio_inputs() const override;
147 void set_audio_input(uint32_t audio_input_id) override;
148 uint32_t get_current_audio_input() const override { return 0; }
151 void post_to_cef_ui_thread(std::function<void()> &&func);
153 CefRefPtr<NageruCEFClient> cef_client;
154 unsigned width, height;
157 bool has_dequeue_callbacks = false;
158 std::function<void()> dequeue_init_callback = nullptr;
159 std::function<void()> dequeue_cleanup_callback = nullptr;
161 bmusb::FrameAllocator *video_frame_allocator = nullptr;
162 std::unique_ptr<bmusb::FrameAllocator> owned_video_frame_allocator;
163 bmusb::frame_callback_t frame_callback = nullptr;
165 std::string description, start_url;
167 std::mutex browser_mutex;
168 CefRefPtr<CefBrowser> browser; // Under <browser_mutex>.
170 // Tasks waiting for <browser> to get ready. Under <browser_mutex>.
171 std::vector<std::function<void()>> deferred_tasks;
176 #endif // !defined(_CEF_CAPTURE_H)