Allow max 1 block per type in RTCP Extended Reports

webrtc/modules/rtp_rtcp/source/rtcp_packet/dlrr.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.
  *
  */
@@ skipping 14 matching lines @@
       : ssrc(ssrc), last_rr(last_rr), delay_since_last_rr(delay) {}
   uint32_t ssrc;
   uint32_t last_rr;
   uint32_t delay_since_last_rr;
 };
 
 // DLRR Report Block: Delay since the Last Receiver Report (RFC 3611).
 class Dlrr {
  public:
   static const uint8_t kBlockType = 5;
-  static const size_t kMaxNumberOfDlrrItems = 100;
 
   Dlrr() {}
   Dlrr(const Dlrr& other) = default;
   ~Dlrr() {}
 
   Dlrr& operator=(const Dlrr& other) = default;
 
+  // Dlrr without items treated same as no dlrr block.
+  explicit operator bool() const { return !sub_blocks_.empty(); }
+
   // Second parameter is value read from block header,
   // i.e. size of block in 32bits excluding block header itself.
   bool Parse(const uint8_t* buffer, uint16_t block_length_32bits);
 
   size_t BlockLength() const;
   // Fills buffer with the Dlrr.
   // Consumes BlockLength() bytes.
   void Create(uint8_t* buffer) const;
 
-  // Max 100 DLRR Items can be added per DLRR report block.
-  bool AddDlrrItem(const ReceiveTimeInfo& time_info);
-  bool AddDlrrItem(uint32_t ssrc, uint32_t last_rr, uint32_t delay_last_rr);
+  void ClearItems() { sub_blocks_.clear(); }
+  void AddDlrrItem(const ReceiveTimeInfo& time_info) {
+    sub_blocks_.push_back(time_info);
+  }
 
   const std::vector<ReceiveTimeInfo>& sub_blocks() const { return sub_blocks_; }
 
  private:
   static const size_t kBlockHeaderLength = 4;
   static const size_t kSubBlockLength = 12;
 
   std::vector<ReceiveTimeInfo> sub_blocks_;
 };
 }  // namespace rtcp
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_DLRR_H_