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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // A very simple packet builder class for building RTCP packets.
      6 // Used for testing only.
      7 #ifndef MEDIA_CAST_RTCP_TEST_RTCP_PACKET_BUILDER_H_
      8 #define MEDIA_CAST_RTCP_TEST_RTCP_PACKET_BUILDER_H_
      9 
     10 #include "media/cast/rtcp/rtcp_defines.h"
     11 #include "net/base/big_endian.h"
     12 
     13 namespace media {
     14 namespace cast {
     15 
     16 // These values are arbitrary only for the purpose of testing.
     17 
     18 namespace {
     19 // Sender report.
     20 static const int kNtpHigh = 0x01020304;
     21 static const int kNtpLow = 0x05060708;
     22 static const int kRtpTimestamp = 0x10203040;
     23 static const int kSendPacketCount = 987;
     24 static const int kSendOctetCount = 87654;
     25 
     26 // Report block.
     27 static const int kLoss = 0x01000123;
     28 static const int kExtendedMax = 0x15678;
     29 static const int kTestJitter = 0x10203;
     30 static const int kLastSr = 0x34561234;
     31 static const int kDelayLastSr = 1000;
     32 
     33 // DLRR block.
     34 static const int kLastRr = 0x34561234;
     35 static const int kDelayLastRr = 1000;
     36 
     37 // REMB.
     38 static const int kTestRembBitrate = 52428;
     39 
     40 // RPSI.
     41 static const int kPayloadtype = 126;
     42 static const uint64 kPictureId = 0x1234567890;
     43 
     44 // NACK.
     45 static const int kMissingPacket = 34567;
     46 
     47 // CAST.
     48 static const uint32 kAckFrameId = 17;
     49 static const uint32 kLostFrameId = 18;
     50 static const uint32 kFrameIdWithLostPackets = 19;
     51 static const int kLostPacketId1 = 3;
     52 static const int kLostPacketId2 = 5;
     53 static const int kLostPacketId3 = 12;
     54 }  // namespace
     55 
     56 class TestRtcpPacketBuilder {
     57  public:
     58   TestRtcpPacketBuilder();
     59 
     60   void AddSr(uint32 sender_ssrc, int number_of_report_blocks);
     61   void AddSrWithNtp(uint32 sender_ssrc, uint32 ntp_high, uint32 ntp_low,
     62                     uint32 rtp_timestamp);
     63   void AddRr(uint32 sender_ssrc, int number_of_report_blocks);
     64   void AddRb(uint32 rtp_ssrc);
     65   void AddSdesCname(uint32 sender_ssrc, const std::string& c_name);
     66 
     67   void AddXrHeader(uint32 sender_ssrc);
     68   void AddXrDlrrBlock(uint32 sender_ssrc);
     69   void AddXrExtendedDlrrBlock(uint32 sender_ssrc);
     70   void AddXrRrtrBlock();
     71   void AddXrUnknownBlock();
     72 
     73   void AddNack(uint32 sender_ssrc, uint32 media_ssrc);
     74   void AddSendReportRequest(uint32 sender_ssrc, uint32 media_ssrc);
     75 
     76   void AddPli(uint32 sender_ssrc, uint32 media_ssrc);
     77   void AddRpsi(uint32 sender_ssrc, uint32 media_ssrc);
     78   void AddRemb(uint32 sender_ssrc, uint32 media_ssrc);
     79   void AddCast(uint32 sender_ssrc, uint32 media_ssrc);
     80   void AddSenderLog(uint32 sender_ssrc);
     81   void AddSenderFrameLog(uint8 event_id, uint32 rtp_timestamp);
     82   void AddReceiverLog(uint32 sender_ssrc);
     83   void AddReceiverFrameLog(uint32 rtp_timestamp, int num_events,
     84                            uint32 event_timesamp_base);
     85   void AddReceiverEventLog(uint16 event_data, uint8 event_id,
     86                            uint16 event_timesamp_delta);
     87 
     88   const uint8* Packet();
     89   int Length() { return kIpPacketSize - big_endian_writer_.remaining(); }
     90 
     91  private:
     92   void AddRtcpHeader(int payload, int format_or_count);
     93   void PatchLengthField();
     94 
     95   // Where the length field of the current packet is.
     96   // Note: 0 is not a legal value, it is used for "uninitialized".
     97   uint8 buffer_[kIpPacketSize];
     98   char* ptr_of_length_;
     99   net::BigEndianWriter big_endian_writer_;
    100 };
    101 
    102 }  // namespace cast
    103 }  // namespace media
    104 
    105 #endif //  MEDIA_CAST_RTCP_TEST_RTCP_PACKET_BUILDER_H_
    106