8 #include "cef_capture.h"
9 #include "nageru_cef_app.h"
13 #include <cef_browser.h>
14 #include <cef_client.h>
16 #include "bmusb/bmusb.h"
19 using namespace std::chrono;
20 using namespace bmusb;
22 extern CefRefPtr<NageruCefApp> cef_app;
24 CEFCapture::CEFCapture(const string &url, unsigned width, unsigned height)
25 : cef_client(new NageruCEFClient(this)),
31 snprintf(buf, sizeof(buf), "CEF card %d", card_index + 1);
35 CEFCapture::~CEFCapture()
37 if (has_dequeue_callbacks) {
38 dequeue_cleanup_callback();
42 void CEFCapture::post_to_cef_ui_thread(std::function<void()> &&func, int64_t delay_ms)
44 lock_guard<recursive_mutex> lock(browser_mutex);
45 if (browser != nullptr) {
47 CefPostTask(TID_UI, new CEFTaskAdapter(std::move(func)));
49 CefPostDelayedTask(TID_UI, new CEFTaskAdapter(std::move(func)), delay_ms);
52 deferred_tasks.push_back(std::move(func));
56 void CEFCapture::set_url(const string &url)
58 post_to_cef_ui_thread([this, url] {
60 browser->GetMainFrame()->LoadURL(url);
64 void CEFCapture::reload()
66 post_to_cef_ui_thread([this] {
72 void CEFCapture::set_max_fps(int max_fps)
74 post_to_cef_ui_thread([this, max_fps] {
75 browser->GetHost()->SetWindowlessFrameRate(max_fps);
76 this->max_fps = max_fps;
80 void CEFCapture::execute_javascript_async(const string &js)
82 post_to_cef_ui_thread([this, js] {
84 CefString script_url("<theme eval>");
86 browser->GetMainFrame()->ExecuteJavaScript(js, script_url, start_line);
88 deferred_javascript.push_back(js);
93 void CEFCapture::resize(unsigned width, unsigned height)
95 lock_guard<mutex> lock(resolution_mutex);
97 this->height = height;
100 void CEFCapture::request_new_frame(bool ignore_if_locked)
102 unique_lock<recursive_mutex> outer_lock(browser_mutex, defer_lock);
103 if (ignore_if_locked && !outer_lock.try_lock()) {
104 // If the caller is holding card_mutex, we need to abort here
105 // if we can't get browser_mutex, since otherwise, the UI thread
106 // might hold browser_mutex (blocking post_to_cef_ui_thread())
107 // and be waiting for card_mutex.
111 // By adding a delay, we make sure we don't get a new frame
112 // delivered immediately (we probably already are on the UI thread),
113 // where we couldn't really deal with it.
114 post_to_cef_ui_thread([this] {
115 lock_guard<recursive_mutex> lock(browser_mutex);
116 if (browser != nullptr) { // Could happen if we are shutting down.
117 browser->GetHost()->Invalidate(PET_VIEW);
122 void CEFCapture::OnPaint(const void *buffer, int width, int height)
124 steady_clock::time_point timestamp = steady_clock::now();
126 VideoFormat video_format;
127 video_format.width = width;
128 video_format.height = height;
129 video_format.stride = width * 4;
130 video_format.frame_rate_nom = max_fps;
131 video_format.frame_rate_den = 1;
132 video_format.has_signal = true;
133 video_format.is_connected = true;
135 FrameAllocator::Frame video_frame = video_frame_allocator->alloc_frame();
136 if (video_frame.data == nullptr) {
137 // We lost a frame, so we need to invalidate the entire thing.
138 // (CEF only sends OnPaint when there are actual changes,
139 // so we need to do this explicitly, or we could be stuck on an
140 // old frame forever if the image doesn't change.)
141 request_new_frame(/*ignore_if_locked=*/false);
144 assert(video_frame.size >= unsigned(width * height * 4));
145 assert(!video_frame.interleaved);
146 memcpy(video_frame.data, buffer, width * height * 4);
147 video_frame.len = video_format.stride * height;
148 video_frame.received_timestamp = timestamp;
149 frame_callback(timecode++,
150 video_frame, 0, video_format,
151 FrameAllocator::Frame(), 0, AudioFormat());
155 void CEFCapture::OnLoadEnd()
157 post_to_cef_ui_thread([this] {
159 for (const string &js : deferred_javascript) {
160 CefString script_url("<theme eval>");
162 browser->GetMainFrame()->ExecuteJavaScript(js, script_url, start_line);
164 deferred_javascript.clear();
168 #define FRAME_SIZE (8 << 20) // 8 MB.
170 void CEFCapture::configure_card()
172 if (video_frame_allocator == nullptr) {
173 owned_video_frame_allocator.reset(new MallocFrameAllocator(FRAME_SIZE, NUM_QUEUED_VIDEO_FRAMES));
174 set_video_frame_allocator(owned_video_frame_allocator.get());
178 void CEFCapture::start_bm_capture()
180 cef_app->initialize_cef();
182 CefPostTask(TID_UI, new CEFTaskAdapter([this]{
183 lock_guard<recursive_mutex> lock(browser_mutex);
185 CefBrowserSettings browser_settings;
186 browser_settings.web_security = cef_state_t::STATE_DISABLED;
187 browser_settings.webgl = cef_state_t::STATE_ENABLED;
188 browser_settings.windowless_frame_rate = max_fps;
190 CefWindowInfo window_info;
191 window_info.SetAsWindowless(0);
192 browser = CefBrowserHost::CreateBrowserSync(window_info, cef_client, start_url, browser_settings, nullptr, nullptr);
193 for (function<void()> &task : deferred_tasks) {
196 deferred_tasks.clear();
200 void CEFCapture::stop_dequeue_thread()
203 lock_guard<recursive_mutex> lock(browser_mutex);
204 cef_app->close_browser(browser);
205 browser = nullptr; // Or unref_cef() will be sad.
207 cef_app->unref_cef();
210 std::map<uint32_t, VideoMode> CEFCapture::get_available_video_modes() const
215 snprintf(buf, sizeof(buf), "%ux%u", width, height);
218 mode.autodetect = false;
220 mode.height = height;
221 mode.frame_rate_num = max_fps;
222 mode.frame_rate_den = 1;
223 mode.interlaced = false;
225 return {{ 0, mode }};
228 std::map<uint32_t, std::string> CEFCapture::get_available_video_inputs() const
230 return {{ 0, "HTML video input" }};
233 std::map<uint32_t, std::string> CEFCapture::get_available_audio_inputs() const
235 return {{ 0, "Fake HTML audio input (silence)" }};
238 void CEFCapture::set_video_mode(uint32_t video_mode_id)
240 assert(video_mode_id == 0);
243 void CEFCapture::set_video_input(uint32_t video_input_id)
245 assert(video_input_id == 0);
248 void CEFCapture::set_audio_input(uint32_t audio_input_id)
250 assert(audio_input_id == 0);
253 void NageruCEFClient::OnPaint(CefRefPtr<CefBrowser> browser, PaintElementType type, const RectList &dirtyRects, const void *buffer, int width, int height)
255 parent->OnPaint(buffer, width, height);
258 void NageruCEFClient::GetViewRect(CefRefPtr<CefBrowser> browser, CefRect &rect)
260 parent->GetViewRect(rect);
263 void CEFCapture::GetViewRect(CefRect &rect)
265 lock_guard<mutex> lock(resolution_mutex);
266 rect = CefRect(0, 0, width, height);
269 void NageruCEFClient::OnLoadEnd(CefRefPtr<CefBrowser> browser, CefRefPtr<CefFrame> frame, int httpStatusCode)