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      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 #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RECEIVER_REPORT_H_
     12 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RECEIVER_REPORT_H_
     13 
     14 #include <vector>
     15 
     16 #include "webrtc/base/basictypes.h"
     17 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet.h"
     18 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/report_block.h"
     19 #include "webrtc/modules/rtp_rtcp/source/rtcp_utility.h"
     20 
     21 namespace webrtc {
     22 namespace rtcp {
     23 
     24 class ReceiverReport : public RtcpPacket {
     25  public:
     26   static const uint8_t kPacketType = 201;
     27   ReceiverReport() : sender_ssrc_(0) {}
     28 
     29   virtual ~ReceiverReport() {}
     30 
     31   // Parse assumes header is already parsed and validated.
     32   bool Parse(const RTCPUtility::RtcpCommonHeader& header,
     33              const uint8_t* payload);  // Size of the payload is in the header.
     34 
     35   void From(uint32_t ssrc) { sender_ssrc_ = ssrc; }
     36   bool WithReportBlock(const ReportBlock& block);
     37 
     38   uint32_t sender_ssrc() const { return sender_ssrc_; }
     39   const std::vector<ReportBlock>& report_blocks() const {
     40     return report_blocks_;
     41   }
     42 
     43  protected:
     44   bool Create(uint8_t* packet,
     45               size_t* index,
     46               size_t max_length,
     47               RtcpPacket::PacketReadyCallback* callback) const override;
     48 
     49  private:
     50   static const size_t kRrBaseLength = 4;
     51   static const size_t kMaxNumberOfReportBlocks = 0x1F;
     52 
     53   size_t BlockLength() const {
     54     return kHeaderLength + kRrBaseLength +
     55            report_blocks_.size() * ReportBlock::kLength;
     56   }
     57 
     58   uint32_t sender_ssrc_;
     59   std::vector<ReportBlock> report_blocks_;
     60 
     61   RTC_DISALLOW_COPY_AND_ASSIGN(ReceiverReport);
     62 };
     63 
     64 }  // namespace rtcp
     65 }  // namespace webrtc
     66 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RECEIVER_REPORT_H_
     67