text: /*
   *  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/base/basictypes.h"
  #include "webrtc/base/constructormagic.h"
  #include "webrtc/modules/rtp_rtcp/source/rtcp_packet.h"
  #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/report_block.h"
  
  namespace webrtc {
  namespace rtcp {
  class CommonHeader;
  
  class ReceiverReport : public RtcpPacket {
   public:
    static const uint8_t kPacketType = 201;
    ReceiverReport() : sender_ssrc_(0) {}
  
    ~ReceiverReport() override {}
  
    // Parse assumes header is already parsed and validated.
    bool Parse(const CommonHeader& packet);
  
    void From(uint32_t ssrc) { sender_ssrc_ = ssrc; }
    bool WithReportBlock(const ReportBlock& block);
  
    uint32_t sender_ssrc() const { return sender_ssrc_; }
    const std::vector<ReportBlock>& report_blocks() const {
      return report_blocks_;
    }
  
   protected:
    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;
  
    size_t BlockLength() const override {
      return kHeaderLength + kRrBaseLength +
             report_blocks_.size() * ReportBlock::kLength;
    }
  
    uint32_t sender_ssrc_;
    std::vector<ReportBlock> report_blocks_;
  
    RTC_DISALLOW_COPY_AND_ASSIGN(ReceiverReport);
  };
  
  }  // namespace rtcp
  }  // namespace webrtc
  #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RECEIVER_REPORT_H_
  