Request keyframe if the first received frame is not a keyframe.

webrtc/video/rtp_stream_receiver_unittest.cc

 /*
  *  Copyright 2017 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 313 matching lines @@
 
   header.header.sequenceNumber = 6;
   rtp_stream_receiver_->OnReceivedPayloadData(data.data(), data.size(),
                                               &header);
 
   EXPECT_CALL(mock_on_complete_frame_callback_, DoOnCompleteFrame(_));
   header.header.sequenceNumber = 5;
   rtp_stream_receiver_->OnReceivedPayloadData(nullptr, 0, &header);
 }
 
+TEST_F(RtpStreamReceiverTest, RequestKeyframeIfFirstFrameIsDelta) {
+  WebRtcRTPHeader rtp_header;
+  const std::vector<uint8_t> data({1, 2, 3, 4});
+  memset(&rtp_header, 0, sizeof(rtp_header));
+  rtp_header.header.sequenceNumber = 1;
+  rtp_header.header.markerBit = 1;
+  rtp_header.type.Video.is_first_packet_in_frame = true;
+  rtp_header.frameType = kVideoFrameDelta;
+  rtp_header.type.Video.codec = kRtpVideoGeneric;
+
+  EXPECT_CALL(mock_key_frame_request_sender_, RequestKeyFrame());
+  rtp_stream_receiver_->OnReceivedPayloadData(data.data(), data.size(),
+                                              &rtp_header);
+}
+
 }  // namespace webrtc