Reland Replace interface VideoCapturerInput with VideoSinkInterface.

webrtc/test/frame_generator.h

Index: webrtc/test/frame_generator.h
diff --git a/webrtc/test/frame_generator.h b/webrtc/test/frame_generator.h
index 7f20c749e8eea9b920ce8b0afde26445eaa10499..fc3f3069986bb5729a93857be8f70c96c9159a9d 100644
--- a/webrtc/test/frame_generator.h
+++ b/webrtc/test/frame_generator.h
@@ -7,12 +7,14 @@
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
-#ifndef WEBRTC_COMMON_VIDEO_TEST_FRAME_GENERATOR_H_
-#define WEBRTC_COMMON_VIDEO_TEST_FRAME_GENERATOR_H_
+#ifndef WEBRTC_TEST_FRAME_GENERATOR_H_
+#define WEBRTC_TEST_FRAME_GENERATOR_H_
 
 #include <string>
 #include <vector>
 
+#include "webrtc/base/criticalsection.h"
+#include "webrtc/media/base/videosourceinterface.h"
 #include "webrtc/typedefs.h"
 #include "webrtc/video_frame.h"
 
@@ -20,6 +22,25 @@ namespace webrtc {
 class Clock;
 namespace test {
 
+// FrameForwarder can be used as an implementation
+// of rtc::VideoSourceInterface<VideoFrame> where the caller controls when
+// a frame should be forwarded to its sink.
+// Currently this implementation only support one sink.
+class FrameForwarder : public rtc::VideoSourceInterface<VideoFrame> {
+ public:
+  FrameForwarder();
+  // Forwards |video_frame| to the registered |sink_|.
+  void IncomingCapturedFrame(const VideoFrame& video_frame);
+
+ private:
+  void AddOrUpdateSink(rtc::VideoSinkInterface<VideoFrame>* sink,
+                       const rtc::VideoSinkWants& wants) override;
+  void RemoveSink(rtc::VideoSinkInterface<VideoFrame>* sink) override;
+
+  rtc::CriticalSection crit_;
+  rtc::VideoSinkInterface<VideoFrame>* sink_ GUARDED_BY(crit_);
+};
+
 class FrameGenerator {
  public:
   FrameGenerator() {}
@@ -61,4 +82,4 @@ class FrameGenerator {
 }  // namespace test
 }  // namespace webrtc
 
-#endif  // WEBRTC_COMMON_VIDEO_TEST_FRAME_GENERATOR_H_
+#endif  // WEBRTC_TEST_FRAME_GENERATOR_H_