Make FlexfecReceiver a concrete class.

webrtc/modules/rtp_rtcp/source/flexfec_receiver_impl.h

-/*
- *  Copyright (c) 2016 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.
- */
-
-#ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_FLEXFEC_RECEIVER_IMPL_H_
-#define WEBRTC_MODULES_RTP_RTCP_SOURCE_FLEXFEC_RECEIVER_IMPL_H_
-
-#include <memory>
-
-#include "webrtc/base/basictypes.h"
-#include "webrtc/base/sequenced_task_checker.h"
-#include "webrtc/call.h"
-#include "webrtc/modules/rtp_rtcp/include/flexfec_receiver.h"
-#include "webrtc/modules/rtp_rtcp/source/forward_error_correction.h"
-#include "webrtc/system_wrappers/include/clock.h"
-
-namespace webrtc {
-
-class FlexfecReceiverImpl : public FlexfecReceiver {
- public:
-  FlexfecReceiverImpl(uint32_t flexfec_ssrc,
-                      uint32_t protected_media_ssrc,
-                      RecoveredPacketReceiver* callback);
-  ~FlexfecReceiverImpl();
-
-  // Implements FlexfecReceiver.
-  bool AddAndProcessReceivedPacket(const uint8_t* packet, size_t packet_length);
-  FecPacketCounter GetPacketCounter() const;
-
- private:
-  bool AddReceivedPacket(const uint8_t* packet, size_t packet_length);
-  bool ProcessReceivedPackets();
-
-  // Config.
-  const uint32_t flexfec_ssrc_;
-  const uint32_t protected_media_ssrc_;
-
-  // Erasure code interfacing and callback.
-  std::unique_ptr<ForwardErrorCorrection> erasure_code_;
-  ForwardErrorCorrection::ReceivedPacketList received_packets_;
-  ForwardErrorCorrection::RecoveredPacketList recovered_packets_;
-  RecoveredPacketReceiver* const callback_;
-
-  // Logging and stats.
-  Clock* const clock_;
-  int64_t last_recovered_packet_ms_;
-  FecPacketCounter packet_counter_;
-
-  rtc::SequencedTaskChecker sequence_checker_;
-};
-
-}  // namespace webrtc
-
-#endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_FLEXFEC_RECEIVER_IMPL_H_