rtcp::Nack packet moved into own file and got Parse function

webrtc/modules/rtp_rtcp/source/rtcp_packet.h

 /*
  *  Copyright (c) 2014 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 309 matching lines @@
     const size_t kFciLength = 4;
     return kCommonFbFmtLength + kFciLength;
   }
 
   RTCPUtility::RTCPPacketPSFBSLI sli_;
   RTCPUtility::RTCPPacketPSFBSLIItem sli_item_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(Sli);
 };
 
-// Generic NACK (RFC 4585).
-//
-// FCI:
-//    0                   1                   2                   3
-//    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-//   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-//   |            PID                |             BLP               |
-//   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-class Nack : public RtcpPacket {
- public:
-  Nack() : RtcpPacket() {
-    memset(&nack_, 0, sizeof(nack_));
-  }
-
-  virtual ~Nack() {}
-
-  void From(uint32_t ssrc) {
-    nack_.SenderSSRC = ssrc;
-  }
-  void To(uint32_t ssrc) {
-    nack_.MediaSSRC = ssrc;
-  }
-  void WithList(const uint16_t* nack_list, int length);
-
- protected:
-  bool Create(uint8_t* packet,
-              size_t* index,
-              size_t max_length,
-              RtcpPacket::PacketReadyCallback* callback) const override;
-
-  size_t BlockLength() const override;
-
- private:
-  RTCPUtility::RTCPPacketRTPFBNACK nack_;
-  std::vector<RTCPUtility::RTCPPacketRTPFBNACKItem> nack_fields_;
-
-  RTC_DISALLOW_COPY_AND_ASSIGN(Nack);
-};
-
 // Reference picture selection indication (RPSI) (RFC 4585).
 //
 // FCI:
 //
 //    0                   1                   2                   3
 //    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
 //   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 //   |      PB       |0| Payload Type|    Native RPSI bit string     |
 //   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 //   |   defined per codec          ...                | Padding (0) |
@@ skipping 327 matching lines @@
 
  private:
   const size_t buffer_length_;
   size_t length_;
   rtc::scoped_ptr<uint8_t[]> buffer_;
 };
 
 }  // namespace rtcp
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_H_