1 /*
2  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 #ifndef WEBRTC_MODULES_AUDIO_CODING_NETEQ_RTCP_H_
12 #define WEBRTC_MODULES_AUDIO_CODING_NETEQ_RTCP_H_
13 
14 #include "webrtc/base/constructormagic.h"
15 #include "webrtc/modules/audio_coding/neteq/include/neteq.h"
16 #include "webrtc/typedefs.h"
17 
18 namespace webrtc {
19 
20 // Forward declaration.
21 struct RTPHeader;
22 
23 class Rtcp {
24  public:
Rtcp()25   Rtcp() {
26     Init(0);
27   }
28 
~Rtcp()29   ~Rtcp() {}
30 
31   // Resets the RTCP statistics, and sets the first received sequence number.
32   void Init(uint16_t start_sequence_number);
33 
34   // Updates the RTCP statistics with a new received packet.
35   void Update(const RTPHeader& rtp_header, uint32_t receive_timestamp);
36 
37   // Returns the current RTCP statistics. If |no_reset| is true, the statistics
38   // are not reset, otherwise they are.
39   void GetStatistics(bool no_reset, RtcpStatistics* stats);
40 
41  private:
42   uint16_t cycles_;  // The number of wrap-arounds for the sequence number.
43   uint16_t max_seq_no_;  // The maximum sequence number received. Starts over
44                          // from 0 after wrap-around.
45   uint16_t base_seq_no_;  // The sequence number of the first received packet.
46   uint32_t received_packets_;  // The number of packets that have been received.
47   uint32_t received_packets_prior_;  // Number of packets received when last
48                                      // report was generated.
49   uint32_t expected_prior_;  // Expected number of packets, at the time of the
50                              // last report.
51   uint32_t jitter_;  // Current jitter value.
52   int32_t transit_;  // Clock difference for previous packet.
53 
54   RTC_DISALLOW_COPY_AND_ASSIGN(Rtcp);
55 };
56 
57 }  // namespace webrtc
58 #endif  // WEBRTC_MODULES_AUDIO_CODING_NETEQ_RTCP_H_
59