MediaStreamVideoSource exports current video format

content/public/renderer/media_stream_api.h

Index: content/public/renderer/media_stream_api.h
diff --git a/content/public/renderer/media_stream_api.h b/content/public/renderer/media_stream_api.h
index b87c93defb5fc3cea366fb9006cb9686aca258ca..907415c9303e380febb0742bcf9e9407c137444d 100644
--- a/content/public/renderer/media_stream_api.h
+++ b/content/public/renderer/media_stream_api.h
@@ -8,10 +8,12 @@
 #include "content/common/content_export.h"
 #include "media/base/audio_capturer_source.h"
 #include "media/base/channel_layout.h"
+#include "media/base/video_capture_types.h"
 #include "media/base/video_capturer_source.h"
 
 namespace blink {
 class WebMediaStream;
+class WebMediaStreamTrack;
 }
 
 namespace content {
@@ -41,6 +43,12 @@ CONTENT_EXPORT bool AddAudioTrackToMediaStream(
     bool is_readonly,
     blink::WebMediaStream* web_media_stream);
 
+// On success returns pointer to the current format of the given video track;
+// returns nullptr on failure (if the argument is invalid or if the format
+// cannot be retrieved at the moment).
+CONTENT_EXPORT const media::VideoCaptureFormat* GetCurrentVideoTrackFormat(
+    const blink::WebMediaStreamTrack& video_track);
+
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_API_H_