Add SetReportBlocks to rtcp Sender/Receive Report classes.

webrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report.h

 /*
  *  Copyright (c) 2015 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 WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RECEIVER_REPORT_H_
 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RECEIVER_REPORT_H_
 
 #include <vector>
 
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/report_block.h"
 #include "webrtc/rtc_base/basictypes.h"
 
 namespace webrtc {
 namespace rtcp {
 class CommonHeader;
 
 class ReceiverReport : public RtcpPacket {
  public:
   static constexpr uint8_t kPacketType = 201;
+  static constexpr size_t kMaxNumberOfReportBlocks = 0x1f;

[eladalon, 2017/07/25 13:26:09]

(Not actionable.)
Does this correspond to a field of 5 bits? I wonder why the limit isn't 32, btw.
Is it every possible to have 0 blocks? If not, they could have made 0 mean 1
report, 1 mean 2 report, etc., up to 31 meaning 32 reports.

[danilchap, 2017/07/25 13:39:00]

yes, there are 5 bits to store number of report blocks.
0 report blocks is valid and common (specially for sender reports)
See rfc3550, section 6.4.1/6.4.2

+
   ReceiverReport();
   ~ReceiverReport() override;
 
   // Parse assumes header is already parsed and validated.
   bool Parse(const CommonHeader& packet);
 
   void SetSenderSsrc(uint32_t ssrc) { sender_ssrc_ = ssrc; }
   bool AddReportBlock(const ReportBlock& block);
+  bool SetReportBlocks(std::vector<ReportBlock> blocks);
 
   uint32_t sender_ssrc() const { return sender_ssrc_; }
   const std::vector<ReportBlock>& report_blocks() const {
     return report_blocks_;
   }
 
   size_t BlockLength() const override;
 
   bool Create(uint8_t* packet,
               size_t* index,
               size_t max_length,
               RtcpPacket::PacketReadyCallback* callback) const override;
 
  private:
   static const size_t kRrBaseLength = 4;
-  static const size_t kMaxNumberOfReportBlocks = 0x1F;
 
   uint32_t sender_ssrc_;
   std::vector<ReportBlock> report_blocks_;
 };
 
 }  // namespace rtcp
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RECEIVER_REPORT_H_