media/cast/net/rtp/rtp_packetizer_unittest.cc

   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 #include "media/cast/net/rtp/rtp_packetizer.h"
   6
   7 #include <stdint.h>
   8
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/test/simple_test_tick_clock.h"
  11 #include "media/cast/logging/logging_impl.h"
  12 #include "media/cast/logging/simple_event_subscriber.h"
  13 #include "media/cast/net/pacing/paced_sender.h"
  14 #include "media/cast/net/rtp/packet_storage.h"
  15 #include "media/cast/net/rtp/rtp_header_parser.h"
  16 #include "media/cast/test/fake_single_thread_task_runner.h"
  17 #include "testing/gmock/include/gmock/gmock.h"
  18
  19 namespace media {
  20 namespace cast {
  21
  22 namespace {
  23 static const int kPayload = 127;
  24 static const uint32 kTimestampMs = 10;
  25 static const uint16 kSeqNum = 33;
  26 static const int kMaxPacketLength = 1500;
  27 static const int kSsrc = 0x12345;
  28 static const unsigned int kFrameSize = 5000;
  29 }
  30
  31 class TestRtpPacketTransport : public PacketSender {
  32  public:
  33   explicit TestRtpPacketTransport(RtpPacketizerConfig config)
  34       : config_(config),
  35         sequence_number_(kSeqNum),
  36         packets_sent_(0),
  37         expected_number_of_packets_(0),
  38         expected_packet_id_(0),
  39         expected_frame_id_(0),
  40         expected_rtp_timestamp_(0) {}
  41
  42   void VerifyRtpHeader(const RtpCastTestHeader& rtp_header) {
  43     VerifyCommonRtpHeader(rtp_header);
  44     VerifyCastRtpHeader(rtp_header);
  45   }
  46
  47   void VerifyCommonRtpHeader(const RtpCastTestHeader& rtp_header) {
  48     EXPECT_EQ(kPayload, rtp_header.payload_type);
  49     EXPECT_EQ(sequence_number_, rtp_header.sequence_number);
  50     EXPECT_EQ(expected_rtp_timestamp_, rtp_header.rtp_timestamp);
  51     EXPECT_EQ(config_.ssrc, rtp_header.ssrc);
  52     EXPECT_EQ(0, rtp_header.num_csrcs);
  53   }
  54
  55   void VerifyCastRtpHeader(const RtpCastTestHeader& rtp_header) {
  56     EXPECT_FALSE(rtp_header.is_key_frame);
  57     EXPECT_EQ(expected_frame_id_, rtp_header.frame_id);
  58     EXPECT_EQ(expected_packet_id_, rtp_header.packet_id);
  59     EXPECT_EQ(expected_number_of_packets_ - 1, rtp_header.max_packet_id);
  60     EXPECT_TRUE(rtp_header.is_reference);
  61     EXPECT_EQ(expected_frame_id_ - 1u, rtp_header.reference_frame_id);
  62   }
  63
  64   bool SendPacket(PacketRef packet, const base::Closure& cb) final {
  65     ++packets_sent_;
  66     RtpHeaderParser parser(&packet->data[0], packet->data.size());
  67     RtpCastTestHeader rtp_header;
  68     parser.Parse(&rtp_header);
  69     VerifyRtpHeader(rtp_header);
  70     ++sequence_number_;
  71     ++expected_packet_id_;
  72     return true;
  73   }
  74
  75   int64 GetBytesSent() final { return 0; }
  76
  77   size_t number_of_packets_received() const { return packets_sent_; }
  78
  79   void set_expected_number_of_packets(size_t expected_number_of_packets) {
  80     expected_number_of_packets_ = expected_number_of_packets;
  81   }
  82
  83   void set_rtp_timestamp(uint32 rtp_timestamp) {
  84     expected_rtp_timestamp_ = rtp_timestamp;
  85   }
  86
  87   RtpPacketizerConfig config_;
  88   uint32 sequence_number_;
  89   size_t packets_sent_;
  90   size_t number_of_packets_;
  91   size_t expected_number_of_packets_;
  92   // Assuming packets arrive in sequence.
  93   int expected_packet_id_;
  94   uint32 expected_frame_id_;
  95   uint32 expected_rtp_timestamp_;
  96
  97   DISALLOW_COPY_AND_ASSIGN(TestRtpPacketTransport);
  98 };
  99
 100 class RtpPacketizerTest : public ::testing::Test {
 101  protected:
 102   RtpPacketizerTest()
 103       : task_runner_(new test::FakeSingleThreadTaskRunner(&testing_clock_)) {
 104     config_.sequence_number = kSeqNum;
 105     config_.ssrc = kSsrc;
 106     config_.payload_type = kPayload;
 107     config_.max_payload_length = kMaxPacketLength;
 108     transport_.reset(new TestRtpPacketTransport(config_));
 109     pacer_.reset(new PacedSender(kTargetBurstSize,
 110                                  kMaxBurstSize,
 111                                  &testing_clock_,
 112                                  &logging_,
 113                                  transport_.get(),
 114                                  task_runner_));
 115     pacer_->RegisterVideoSsrc(config_.ssrc);
 116     rtp_packetizer_.reset(new RtpPacketizer(
 117         pacer_.get(), &packet_storage_, config_));
 118     video_frame_.dependency = EncodedFrame::DEPENDENT;
 119     video_frame_.frame_id = 0;
 120     video_frame_.referenced_frame_id = kStartFrameId;
 121     video_frame_.data.assign(kFrameSize, 123);
 122     video_frame_.rtp_timestamp = 0x0055aa11;
 123   }
 124
 125   void RunTasks(int during_ms) {
 126     for (int i = 0; i < during_ms; ++i) {
 127       // Call process the timers every 1 ms.
 128       testing_clock_.Advance(base::TimeDelta::FromMilliseconds(1));
 129       task_runner_->RunTasks();
 130     }
 131   }
 132
 133   base::SimpleTestTickClock testing_clock_;
 134   scoped_refptr<test::FakeSingleThreadTaskRunner> task_runner_;
 135   EncodedFrame video_frame_;
 136   PacketStorage packet_storage_;
 137   RtpPacketizerConfig config_;
 138   scoped_ptr<TestRtpPacketTransport> transport_;
 139   LoggingImpl logging_;
 140   scoped_ptr<PacedSender> pacer_;
 141   scoped_ptr<RtpPacketizer> rtp_packetizer_;
 142
 143   DISALLOW_COPY_AND_ASSIGN(RtpPacketizerTest);
 144 };
 145
 146 TEST_F(RtpPacketizerTest, SendStandardPackets) {
 147   size_t expected_num_of_packets = kFrameSize / kMaxPacketLength + 1;
 148   transport_->set_expected_number_of_packets(expected_num_of_packets);
 149   transport_->set_rtp_timestamp(video_frame_.rtp_timestamp);
 150
 151   testing_clock_.Advance(base::TimeDelta::FromMilliseconds(kTimestampMs));
 152   video_frame_.reference_time = testing_clock_.NowTicks();
 153   rtp_packetizer_->SendFrameAsPackets(video_frame_);
 154   RunTasks(33 + 1);
 155   EXPECT_EQ(expected_num_of_packets, transport_->number_of_packets_received());
 156 }
 157
 158 TEST_F(RtpPacketizerTest, Stats) {
 159   EXPECT_FALSE(rtp_packetizer_->send_packet_count());
 160   EXPECT_FALSE(rtp_packetizer_->send_octet_count());
 161   // Insert packets at varying lengths.
 162   size_t expected_num_of_packets = kFrameSize / kMaxPacketLength + 1;
 163   transport_->set_expected_number_of_packets(expected_num_of_packets);
 164   transport_->set_rtp_timestamp(video_frame_.rtp_timestamp);
 165
 166   testing_clock_.Advance(base::TimeDelta::FromMilliseconds(kTimestampMs));
 167   video_frame_.reference_time = testing_clock_.NowTicks();
 168   rtp_packetizer_->SendFrameAsPackets(video_frame_);
 169   RunTasks(33 + 1);
 170   EXPECT_EQ(expected_num_of_packets, rtp_packetizer_->send_packet_count());
 171   EXPECT_EQ(kFrameSize, rtp_packetizer_->send_octet_count());
 172   EXPECT_EQ(expected_num_of_packets, transport_->number_of_packets_received());
 173 }
 174
 175 }  // namespace cast
 176 }  // namespace media