modules/audio_coding/neteq/rtcp.h

/*
 *  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.
 */

#ifndef MODULES_AUDIO_CODING_NETEQ_RTCP_H_
#define MODULES_AUDIO_CODING_NETEQ_RTCP_H_

#include <stdint.h>

#include "rtc_base/constructormagic.h"

namespace webrtc {

struct RtcpStatistics;
struct RTPHeader;

class Rtcp {
 public:
  Rtcp() { Init(0); }

  ~Rtcp() {}

  // Resets the RTCP statistics, and sets the first received sequence number.
  void Init(uint16_t start_sequence_number);

  // Updates the RTCP statistics with a new received packet.
  void Update(const RTPHeader& rtp_header, uint32_t receive_timestamp);

  // Returns the current RTCP statistics. If |no_reset| is true, the statistics
  // are not reset, otherwise they are.
  void GetStatistics(bool no_reset, RtcpStatistics* stats);

 private:
  uint16_t cycles_;       // The number of wrap-arounds for the sequence number.
  uint16_t max_seq_no_;   // The maximum sequence number received. Starts over
                          // from 0 after wrap-around.
  uint16_t base_seq_no_;  // The sequence number of the first received packet.
  uint32_t received_packets_;  // The number of packets that have been received.
  uint32_t received_packets_prior_;  // Number of packets received when last
                                     // report was generated.
  uint32_t expected_prior_;  // Expected number of packets, at the time of the
                             // last report.
  int64_t jitter_;           // Current jitter value in Q4.
  int32_t transit_;          // Clock difference for previous packet.

  RTC_DISALLOW_COPY_AND_ASSIGN(Rtcp);
};

}  // namespace webrtc
#endif  // MODULES_AUDIO_CODING_NETEQ_RTCP_H_