1/*
2 *  Copyright (c) 2015 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
12#ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_DLRR_H_
13#define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_DLRR_H_
14
15#include <vector>
16
17#include "webrtc/base/basictypes.h"
18
19namespace webrtc {
20namespace rtcp {
21
22// DLRR Report Block: Delay since the Last Receiver Report (RFC 3611).
23class Dlrr {
24 public:
25  struct SubBlock {
26    // RFC 3611 4.5
27    uint32_t ssrc;
28    uint32_t last_rr;
29    uint32_t delay_since_last_rr;
30  };
31
32  static const uint8_t kBlockType = 5;
33  static const size_t kMaxNumberOfDlrrItems = 100;
34
35  Dlrr() {}
36  Dlrr(const Dlrr& other) = default;
37  ~Dlrr() {}
38
39  Dlrr& operator=(const Dlrr& other) = default;
40
41  // Second parameter is value read from block header,
42  // i.e. size of block in 32bits excluding block header itself.
43  bool Parse(const uint8_t* buffer, uint16_t block_length_32bits);
44
45  size_t BlockLength() const;
46  // Fills buffer with the Dlrr.
47  // Consumes BlockLength() bytes.
48  void Create(uint8_t* buffer) const;
49
50  // Max 100 DLRR Items can be added per DLRR report block.
51  bool WithDlrrItem(uint32_t ssrc, uint32_t last_rr, uint32_t delay_last_rr);
52
53  const std::vector<SubBlock>& sub_blocks() const { return sub_blocks_; }
54
55 private:
56  static const size_t kBlockHeaderLength = 4;
57  static const size_t kSubBlockLength = 12;
58
59  std::vector<SubBlock> sub_blocks_;
60};
61}  // namespace rtcp
62}  // namespace webrtc
63#endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_DLRR_H_
64