[rtp_rtcp] rtcp::Tmmbr cleaned and got Parse function

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

 /*
  *  Copyright (c) 2016 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_TMMBR_H_
 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_TMMBR_H_
 
+#include <vector>
+
 #include "webrtc/base/basictypes.h"
-#include "webrtc/modules/rtp_rtcp/source/rtcp_packet.h"
+#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.h"
+#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/tmmb_item.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_utility.h"
 
 namespace webrtc {
 namespace rtcp {
-// Temporary Maximum Media Stream Bit Rate Request (TMMBR) (RFC 5104).
-class Tmmbr : public RtcpPacket {
+// Temporary Maximum Media Stream Bit Rate Request (TMMBR).
+// RFC 5104, Section 4.2.1.
+class Tmmbr : public Rtpfb {
  public:
-  Tmmbr() : RtcpPacket() {
-    memset(&tmmbr_, 0, sizeof(tmmbr_));
-    memset(&tmmbr_item_, 0, sizeof(tmmbr_item_));
-  }
+  static const uint8_t kFeedbackMessageType = 3;
 
-  virtual ~Tmmbr() {}
+  Tmmbr() {}
+  ~Tmmbr() override {}
 
-  void From(uint32_t ssrc) {
-    tmmbr_.SenderSSRC = ssrc;
-  }
-  void To(uint32_t ssrc) {
-    tmmbr_item_.SSRC = ssrc;
-  }
-  void WithBitrateKbps(uint32_t bitrate_kbps) {
-    tmmbr_item_.MaxTotalMediaBitRate = bitrate_kbps;
-  }
-  void WithOverhead(uint16_t overhead) {
-    assert(overhead <= 0x1ff);
-    tmmbr_item_.MeasuredOverhead = overhead;
-  }
+  // 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 WithTmmbr(const TmmbItem& item);
+
+  const std::vector<TmmbItem>& requests() const { return items_; }
 
  protected:
   bool Create(uint8_t* packet,
               size_t* index,
               size_t max_length,
               RtcpPacket::PacketReadyCallback* callback) const override;
 
  private:
-  size_t BlockLength() const {
-    const size_t kFciLen = 8;
-    return kCommonFbFmtLength + kFciLen;
+  size_t BlockLength() const override {
+    return kHeaderLength + kCommonFeedbackLength +
+           TmmbItem::kLength * items_.size();
   }
 
-  RTCPUtility::RTCPPacketRTPFBTMMBR tmmbr_;
-  RTCPUtility::RTCPPacketRTPFBTMMBRItem tmmbr_item_;
+  // Media ssrc is unused, shadow base class setter and getter.
+  void To(uint32_t ssrc);
+  uint32_t media_ssrc() const;
+
+  std::vector<TmmbItem> items_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(Tmmbr);
 };
 }  // namespace rtcp
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_TMMBR_H_