src/media/cast/rtcp/rtcp_sender.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_CAST_RTCP_RTCP_SENDER_H_
   6 #define MEDIA_CAST_RTCP_RTCP_SENDER_H_
   7
   8 #include <list>
   9 #include <string>
  10
  11 #include "media/cast/cast_config.h"
  12 #include "media/cast/cast_defines.h"
  13 #include "media/cast/rtcp/rtcp.h"
  14 #include "media/cast/rtcp/rtcp_defines.h"
  15
  16 namespace media {
  17 namespace cast {
  18
  19 class RtcpSender {
  20  public:
  21   RtcpSender(PacedPacketSender* const paced_packet_sender,
  22              uint32 sending_ssrc,
  23              const std::string& c_name);
  24
  25   virtual ~RtcpSender();
  26
  27   void SendRtcp(uint32 packet_type_flags,
  28                 const RtcpSenderInfo* sender_info,
  29                 const RtcpReportBlock* report_block,
  30                 uint32 pli_remote_ssrc,
  31                 const RtcpDlrrReportBlock* dlrr,
  32                 const RtcpReceiverReferenceTimeReport* rrtr,
  33                 const RtcpCastMessage* cast_message);
  34
  35   enum RtcpPacketType {
  36     kRtcpSr     = 0x0002,
  37     kRtcpRr     = 0x0004,
  38     kRtcpBye    = 0x0008,
  39     kRtcpPli    = 0x0010,
  40     kRtcpNack   = 0x0020,
  41     kRtcpFir    = 0x0040,
  42     kRtcpSrReq  = 0x0200,
  43     kRtcpDlrr   = 0x0400,
  44     kRtcpRrtr   = 0x0800,
  45     kRtcpRpsi   = 0x8000,
  46     kRtcpRemb   = 0x10000,
  47     kRtcpCast   = 0x20000,
  48   };
  49
  50  private:
  51   void BuildSR(const RtcpSenderInfo& sender_info,
  52                const RtcpReportBlock* report_block,
  53                std::vector<uint8>* packet) const;
  54
  55   void BuildRR(const RtcpReportBlock* report_block,
  56                std::vector<uint8>* packet) const;
  57
  58   void AddReportBlocks(const RtcpReportBlock& report_block,
  59                        std::vector<uint8>* packet) const;
  60
  61   void BuildSdec(std::vector<uint8>* packet) const;
  62
  63   void BuildPli(uint32 remote_ssrc,
  64                 std::vector<uint8>* packet) const;
  65
  66   void BuildRemb(const RtcpRembMessage* remb,
  67                  std::vector<uint8>* packet) const;
  68
  69   void BuildRpsi(const RtcpRpsiMessage* rpsi,
  70                  std::vector<uint8>* packet) const;
  71
  72   void BuildNack(const RtcpNackMessage* nack,
  73                  std::vector<uint8>* packet) const;
  74
  75   void BuildBye(std::vector<uint8>* packet) const;
  76
  77   void BuildDlrrRb(const RtcpDlrrReportBlock* dlrr,
  78                    std::vector<uint8>* packet) const;
  79
  80   void BuildRrtr(const RtcpReceiverReferenceTimeReport* rrtr,
  81                  std::vector<uint8>* packet) const;
  82
  83   void BuildCast(const RtcpCastMessage* cast_message,
  84                  std::vector<uint8>* packet) const;
  85
  86   inline void BitrateToRembExponentBitrate(uint32 bitrate,
  87                                            uint8* exponent,
  88                                            uint32* mantissa) const {
  89     // 6 bit exponent and a 18 bit mantissa.
  90     *exponent = 0;
  91     for (int i = 0; i < 64; ++i) {
  92       if (bitrate <= (262143u << i)) {
  93         *exponent = i;
  94         break;
  95       }
  96     }
  97     *mantissa = (bitrate >> *exponent);
  98   }
  99
 100   const uint32 ssrc_;
 101   const std::string c_name_;
 102
 103   // Not owned by this class.
 104   PacedPacketSender* transport_;
 105
 106   DISALLOW_COPY_AND_ASSIGN(RtcpSender);
 107 };
 108
 109 }  // namespace cast
 110 }  // namespace media
 111 #endif  // MEDIA_CAST_RTCP_RTCP_SENDER_H_