ACM: Move NACK functionality inside NetEq

webrtc/modules/audio_coding/neteq/include/neteq.h

 /*
  *  Copyright (c) 2012 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 254 matching lines @@
   // this method to get the decoder's error code.
   virtual int LastDecoderError() = 0;
 
   // Flushes both the packet buffer and the sync buffer.
   virtual void FlushBuffers() = 0;
 
   // Current usage of packet-buffer and it's limits.
   virtual void PacketBufferStatistics(int* current_num_packets,
                                       int* max_num_packets) const = 0;
 
-  // Get sequence number and timestamp of the latest RTP.
-  // This method is to facilitate NACK.
-  virtual int DecodedRtpInfo(int* sequence_number,
-                             uint32_t* timestamp) const = 0;
+  // Enables NACK and sets the maximum size of the NACK list, which should be
+  // positive and no larger than Nack::kNackListSizeLimit. If NACK is already
+  // enabled then the maximum NACK list size is modified accordingly.
+  virtual void EnableNack(size_t max_nack_list_size) = 0;
+
+  virtual void DisableNack() = 0;
+
+  // Returns a list of RTP sequence numbers corresponding to packets to be
+  // retransmitted, given an estimate of the round-trip time in milliseconds.
+  virtual std::vector<uint16_t> GetNackList(
+      int64_t round_trip_time_ms) const = 0;
 
  protected:
   NetEq() {}
 
  private:
   RTC_DISALLOW_COPY_AND_ASSIGN(NetEq);
 };
 
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_AUDIO_CODING_NETEQ_INCLUDE_NETEQ_H_