X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=nageru%2Fcef_capture.cpp;h=952486158cdb67e19d604c6322af253d745b71ea;hb=d6e55865d7feccfc000c6187e285212fbfb8e9f7;hp=b6b8cca489ff782182541101a1db372ac1ab735a;hpb=9b7d691b4cc5db7dbfc18c82e86c1207fcac4722;p=nageru

diff --git a/nageru/cef_capture.cpp b/nageru/cef_capture.cpp
index b6b8cca..9524861 100644
--- a/nageru/cef_capture.cpp
+++ b/nageru/cef_capture.cpp
@@ -97,8 +97,17 @@ void CEFCapture::resize(unsigned width, unsigned height)
 	this->height = height;
 }
 
-void CEFCapture::request_new_frame()
+void CEFCapture::request_new_frame(bool ignore_if_locked)
 {
+	unique_lock<recursive_mutex> outer_lock(browser_mutex, defer_lock);
+	if (ignore_if_locked && !outer_lock.try_lock()) {
+		// If the caller is holding card_mutex, we need to abort here
+		// if we can't get browser_mutex, since otherwise, the UI thread
+		// might hold browser_mutex (blocking post_to_cef_ui_thread())
+		// and be waiting for card_mutex.
+		return;
+	}
+
 	// By adding a delay, we make sure we don't get a new frame
 	// delivered immediately (we probably already are on the UI thread),
 	// where we couldn't really deal with it.
@@ -129,7 +138,7 @@ void CEFCapture::OnPaint(const void *buffer, int width, int height)
 		// (CEF only sends OnPaint when there are actual changes,
 		// so we need to do this explicitly, or we could be stuck on an
 		// old frame forever if the image doesn't change.)
-		request_new_frame();
+		request_new_frame(/*ignore_if_locked=*/false);
 		++timecode;
 	} else {
 		assert(video_frame.size >= unsigned(width * height * 4));
@@ -246,16 +255,15 @@ void NageruCEFClient::OnPaint(CefRefPtr<CefBrowser> browser, PaintElementType ty
 	parent->OnPaint(buffer, width, height);
 }
 
-bool NageruCEFClient::GetViewRect(CefRefPtr<CefBrowser> browser, CefRect &rect)
+void NageruCEFClient::GetViewRect(CefRefPtr<CefBrowser> browser, CefRect &rect)
 {
-	return parent->GetViewRect(rect);
+	parent->GetViewRect(rect);
 }
 
-bool CEFCapture::GetViewRect(CefRect &rect)
+void CEFCapture::GetViewRect(CefRect &rect)
 {
 	lock_guard<mutex> lock(resolution_mutex);
 	rect = CefRect(0, 0, width, height);
-	return true;
 }
 
 void NageruCEFClient::OnLoadEnd(CefRefPtr<CefBrowser> browser, CefRefPtr<CefFrame> frame, int httpStatusCode)