1 /*
2  *  Copyright (c) 2016 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_TMMBN_H_
13 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_TMMBN_H_
14 
15 #include <vector>
16 #include "webrtc/base/basictypes.h"
17 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet.h"
18 #include "webrtc/modules/rtp_rtcp/source/rtcp_utility.h"
19 
20 namespace webrtc {
21 namespace rtcp {
22 
23 // Temporary Maximum Media Stream Bit Rate Notification (TMMBN) (RFC 5104).
24 class Tmmbn : public RtcpPacket {
25  public:
Tmmbn()26   Tmmbn() : RtcpPacket() {
27     memset(&tmmbn_, 0, sizeof(tmmbn_));
28   }
29 
~Tmmbn()30   virtual ~Tmmbn() {}
31 
From(uint32_t ssrc)32   void From(uint32_t ssrc) {
33     tmmbn_.SenderSSRC = ssrc;
34   }
35   // Max 50 TMMBR can be added per TMMBN.
36   bool WithTmmbr(uint32_t ssrc, uint32_t bitrate_kbps, uint16_t overhead);
37 
38  protected:
39   bool Create(uint8_t* packet,
40               size_t* index,
41               size_t max_length,
42               RtcpPacket::PacketReadyCallback* callback) const override;
43 
44  private:
45   static const int kMaxNumberOfTmmbrs = 50;
46 
BlockLength()47   size_t BlockLength() const {
48     const size_t kFciLen = 8;
49     return kCommonFbFmtLength + kFciLen * tmmbn_items_.size();
50   }
51 
52   RTCPUtility::RTCPPacketRTPFBTMMBN tmmbn_;
53   std::vector<RTCPUtility::RTCPPacketRTPFBTMMBRItem> tmmbn_items_;
54 
55   RTC_DISALLOW_COPY_AND_ASSIGN(Tmmbn);
56 };
57 
58 }  // namespace rtcp
59 }  // namespace webrtc
60 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_TMMBN_H_
61