Add support for VP9 packetization/depacketization.

webrtc/modules/video_coding/main/source/packet.cc

 /*
  *  Copyright (c) 2011 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 100 matching lines @@
         completeNALU = kNaluComplete;
       else if (isFirstPacket)
         completeNALU = kNaluStart;
       else if (markerBit)
         completeNALU = kNaluEnd;
       else
         completeNALU = kNaluIncomplete;
 
       codec = kVideoCodecVP8;
       return;
+    case kRtpVideoVp9:
+      if (isFirstPacket && markerBit)
+        completeNALU = kNaluComplete;
+      else if (isFirstPacket)
+        completeNALU = kNaluStart;
+      else if (markerBit)
+        completeNALU = kNaluEnd;
+      else
+        completeNALU = kNaluIncomplete;
+
+      codec = kVideoCodecVP9;
+      return;
     case kRtpVideoH264:
       isFirstPacket = videoHeader.isFirstPacket;
       if (isFirstPacket)
         insertStartCode = true;
 
       if (isFirstPacket && markerBit) {
         completeNALU = kNaluComplete;
       } else if (isFirstPacket) {
         completeNALU = kNaluStart;
       } else if (markerBit) {
         completeNALU = kNaluEnd;
       } else {
         completeNALU = kNaluIncomplete;
       }
       codec = kVideoCodecH264;
       return;
     case kRtpVideoGeneric:
     case kRtpVideoNone:
       codec = kVideoCodecUnknown;
       return;
   }
 }
 
 }  // namespace webrtc