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      1 /*
      2  *  Copyright (c) 2016 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 
     12 #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_TMMBR_H_
     13 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_TMMBR_H_
     14 
     15 #include "webrtc/base/basictypes.h"
     16 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet.h"
     17 #include "webrtc/modules/rtp_rtcp/source/rtcp_utility.h"
     18 
     19 namespace webrtc {
     20 namespace rtcp {
     21 // Temporary Maximum Media Stream Bit Rate Request (TMMBR) (RFC 5104).
     22 class Tmmbr : public RtcpPacket {
     23  public:
     24   Tmmbr() : RtcpPacket() {
     25     memset(&tmmbr_, 0, sizeof(tmmbr_));
     26     memset(&tmmbr_item_, 0, sizeof(tmmbr_item_));
     27   }
     28 
     29   virtual ~Tmmbr() {}
     30 
     31   void From(uint32_t ssrc) {
     32     tmmbr_.SenderSSRC = ssrc;
     33   }
     34   void To(uint32_t ssrc) {
     35     tmmbr_item_.SSRC = ssrc;
     36   }
     37   void WithBitrateKbps(uint32_t bitrate_kbps) {
     38     tmmbr_item_.MaxTotalMediaBitRate = bitrate_kbps;
     39   }
     40   void WithOverhead(uint16_t overhead) {
     41     assert(overhead <= 0x1ff);
     42     tmmbr_item_.MeasuredOverhead = overhead;
     43   }
     44 
     45  protected:
     46   bool Create(uint8_t* packet,
     47               size_t* index,
     48               size_t max_length,
     49               RtcpPacket::PacketReadyCallback* callback) const override;
     50 
     51  private:
     52   size_t BlockLength() const {
     53     const size_t kFciLen = 8;
     54     return kCommonFbFmtLength + kFciLen;
     55   }
     56 
     57   RTCPUtility::RTCPPacketRTPFBTMMBR tmmbr_;
     58   RTCPUtility::RTCPPacketRTPFBTMMBRItem tmmbr_item_;
     59 
     60   RTC_DISALLOW_COPY_AND_ASSIGN(Tmmbr);
     61 };
     62 }  // namespace rtcp
     63 }  // namespace webrtc
     64 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_TMMBR_H_
     65