[rtp_rtcp] rtcp::ExtenededReports packet got Parse function

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

Index: webrtc/modules/rtp_rtcp/source/rtcp_packet/extended_reports.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_packet/extended_reports.h b/webrtc/modules/rtp_rtcp/source/rtcp_packet/extended_reports.h
index 6afac360e5f415f5fa8373669923c3682a69082b..a85576db2dac20b2c190e8ae3dc3859b1951477d 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_packet/extended_reports.h
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_packet/extended_reports.h
@@ -25,21 +25,28 @@ namespace rtcp {
 // From RFC 3611: RTP Control Protocol Extended Reports (RTCP XR).
 class ExtendedReports : public RtcpPacket {
  public:
-  typedef std::vector<RTCPUtility::RTCPPacketXRDLRRReportBlockItem> DlrrBlock;
-  ExtendedReports() : RtcpPacket() {
-    memset(&xr_header_, 0, sizeof(xr_header_));
-  }
+  static const uint8_t kPacketType = 207;
 
-  virtual ~ExtendedReports() {}
+  ExtendedReports();
+  ~ExtendedReports() override;
 
-  void From(uint32_t ssrc) {
-    xr_header_.OriginatorSSRC = ssrc;
-  }
+  // Parse assumes header is already parsed and validated.
+  bool Parse(const RTCPUtility::RtcpCommonHeader& header,
+             const uint8_t* payload);  // Size of the payload is in the header.
+
+  void From(uint32_t ssrc) { sender_ssrc_ = ssrc; }
 
   // Max 50 items of each of {Rrtr, Dlrr, VoipMetric} allowed per Xr.
-  bool WithRrtr(Rrtr* rrtr);
-  bool WithDlrr(Dlrr* dlrr);
-  bool WithVoipMetric(VoipMetric* voip_metric);
+  bool WithRrtr(const Rrtr& rrtr);
+  bool WithDlrr(const Dlrr& dlrr);
+  bool WithVoipMetric(const VoipMetric& voip_metric);
+
+  uint32_t sender_ssrc() const { return sender_ssrc_; }
+  const std::vector<Rrtr>& rrtrs() const { return rrtr_blocks_; }
+  const std::vector<Dlrr>& dlrrs() const { return dlrr_blocks_; }
+  const std::vector<VoipMetric>& voip_metrics() const {
+    return voip_metric_blocks_;
+  }
 
  protected:
   bool Create(uint8_t* packet,
@@ -48,31 +55,33 @@ class ExtendedReports : public RtcpPacket {
               RtcpPacket::PacketReadyCallback* callback) const override;
 
  private:
-  static const int kMaxNumberOfRrtrBlocks = 50;
-  static const int kMaxNumberOfDlrrBlocks = 50;
-  static const int kMaxNumberOfVoipMetricBlocks = 50;
-
-  size_t BlockLength() const {
-    const size_t kXrHeaderLength = 8;
-    return kXrHeaderLength + RrtrLength() + DlrrLength() + VoipMetricLength();
+  static const size_t kMaxNumberOfRrtrBlocks = 50;
+  static const size_t kMaxNumberOfDlrrBlocks = 50;
+  static const size_t kMaxNumberOfVoipMetricBlocks = 50;
+  static const size_t kXrBaseLength = 4;
+
+  size_t BlockLength() const override {
+    return kHeaderLength + kXrBaseLength + RrtrLength() + DlrrLength() +
+           VoipMetricLength();
   }
 
   size_t RrtrLength() const { return Rrtr::kLength * rrtr_blocks_.size(); }
-
   size_t DlrrLength() const;
-
   size_t VoipMetricLength() const {
     return VoipMetric::kLength * voip_metric_blocks_.size();
   }
 
-  RTCPUtility::RTCPPacketXR xr_header_;
+  void ParseRrtrBlock(const uint8_t* block, uint16_t block_length);
+  void ParseDlrrBlock(const uint8_t* block, uint16_t block_length);
+  void ParseVoipMetricBlock(const uint8_t* block, uint16_t block_length);
+
+  uint32_t sender_ssrc_;
   std::vector<Rrtr> rrtr_blocks_;
   std::vector<Dlrr> dlrr_blocks_;
   std::vector<VoipMetric> voip_metric_blocks_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(ExtendedReports);
 };
-
 }  // namespace rtcp
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_EXTENDED_REPORTS_H_