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      1 // Copyright 2014 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 "base/big_endian.h"
     11 #include "media/cast/cast_config.h"
     12 #include "media/cast/net/cast_transport_defines.h"
     13 #include "media/cast/net/rtcp/rtcp_defines.h"
     14 
     15 namespace media {
     16 namespace cast {
     17 
     18 // These values are arbitrary only for the purpose of testing.
     19 
     20 namespace {
     21 // Sender report.
     22 static const uint32 kNtpHigh = 0x01020304;
     23 static const uint32 kNtpLow = 0x05060708;
     24 static const uint32 kRtpTimestamp = 0x10203040;
     25 static const uint32 kSendPacketCount = 987;
     26 static const uint32 kSendOctetCount = 87654;
     27 
     28 // Report block.
     29 static const int kLoss = 0x01000123;
     30 static const int kExtendedMax = 0x15678;
     31 static const int kTestJitter = 0x10203;
     32 static const uint32 kLastSr = 0x34561234;
     33 static const uint32 kDelayLastSr = 1000;
     34 
     35 // DLRR block.
     36 static const int kLastRr = 0x34561234;
     37 static const int kDelayLastRr = 1000;
     38 
     39 // NACK.
     40 static const int kMissingPacket = 34567;
     41 
     42 // CAST.
     43 static const uint32 kAckFrameId = 17;
     44 static const uint32 kLostFrameId = 18;
     45 static const uint32 kFrameIdWithLostPackets = 19;
     46 static const int kLostPacketId1 = 3;
     47 static const int kLostPacketId2 = 5;
     48 static const int kLostPacketId3 = 12;
     49 }  // namespace
     50 
     51 class TestRtcpPacketBuilder {
     52  public:
     53   TestRtcpPacketBuilder();
     54 
     55   void AddSr(uint32 sender_ssrc, int number_of_report_blocks);
     56   void AddSrWithNtp(uint32 sender_ssrc,
     57                     uint32 ntp_high,
     58                     uint32 ntp_low,
     59                     uint32 rtp_timestamp);
     60   void AddRr(uint32 sender_ssrc, int number_of_report_blocks);
     61   void AddRb(uint32 rtp_ssrc);
     62 
     63   void AddXrHeader(uint32 sender_ssrc);
     64   void AddXrDlrrBlock(uint32 sender_ssrc);
     65   void AddXrExtendedDlrrBlock(uint32 sender_ssrc);
     66   void AddXrRrtrBlock();
     67   void AddXrUnknownBlock();
     68   void AddUnknownBlock();
     69 
     70   void AddNack(uint32 sender_ssrc, uint32 media_ssrc);
     71   void AddSendReportRequest(uint32 sender_ssrc, uint32 media_ssrc);
     72 
     73   void AddCast(uint32 sender_ssrc,
     74                uint32 media_ssrc,
     75                base::TimeDelta target_delay);
     76   void AddReceiverLog(uint32 sender_ssrc);
     77   void AddReceiverFrameLog(uint32 rtp_timestamp,
     78                            int num_events,
     79                            uint32 event_timesamp_base);
     80   void AddReceiverEventLog(uint16 event_data,
     81                            CastLoggingEvent event,
     82                            uint16 event_timesamp_delta);
     83 
     84   scoped_ptr<Packet> GetPacket();
     85   const uint8* Data();
     86   int Length() { return kMaxIpPacketSize - big_endian_writer_.remaining(); }
     87   base::BigEndianReader* Reader();
     88 
     89  private:
     90   void AddRtcpHeader(int payload, int format_or_count);
     91   void PatchLengthField();
     92 
     93   // Where the length field of the current packet is.
     94   // Note: 0 is not a legal value, it is used for "uninitialized".
     95   uint8 buffer_[kMaxIpPacketSize];
     96   char* ptr_of_length_;
     97   base::BigEndianWriter big_endian_writer_;
     98   base::BigEndianReader big_endian_reader_;
     99 
    100   DISALLOW_COPY_AND_ASSIGN(TestRtcpPacketBuilder);
    101 };
    102 
    103 }  // namespace cast
    104 }  // namespace media
    105 
    106 #endif  //  MEDIA_CAST_RTCP_TEST_RTCP_PACKET_BUILDER_H_
    107