src/media/cast/transport/rtp_sender/rtp_packetizer/rtp_packetizer_unittest.cc

   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 #include "media/cast/transport/rtp_sender/rtp_packetizer/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/simple_event_subscriber.h"
  12 #include "media/cast/test/fake_single_thread_task_runner.h"
  13 #include "media/cast/transport/pacing/paced_sender.h"
  14 #include "media/cast/transport/rtp_sender/packet_storage/packet_storage.h"
  15 #include "media/cast/transport/rtp_sender/rtp_packetizer/test/rtp_header_parser.h"
  16 #include "testing/gmock/include/gmock/gmock.h"
  17
  18 namespace media {
  19 namespace cast {
  20 namespace transport {
  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 static const uint32 kStartFrameId = UINT32_C(0xffffffff);
  30 }
  31
  32 class TestRtpPacketTransport : public PacketSender {
  33  public:
  34   explicit TestRtpPacketTransport(RtpPacketizerConfig config)
  35       : config_(config),
  36         sequence_number_(kSeqNum),
  37         packets_sent_(0),
  38         expected_number_of_packets_(0),
  39         expected_packet_id_(0),
  40         expected_frame_id_(0),
  41         expectd_rtp_timestamp_(0) {}
  42
  43   void VerifyRtpHeader(const RtpCastTestHeader& rtp_header) {
  44     VerifyCommonRtpHeader(rtp_header);
  45     VerifyCastRtpHeader(rtp_header);
  46   }
  47
  48   void VerifyCommonRtpHeader(const RtpCastTestHeader& rtp_header) {
  49     EXPECT_EQ(kPayload, rtp_header.payload_type);
  50     EXPECT_EQ(sequence_number_, rtp_header.sequence_number);
  51     EXPECT_EQ(expectd_rtp_timestamp_, rtp_header.rtp_timestamp);
  52     EXPECT_EQ(config_.ssrc, rtp_header.ssrc);
  53     EXPECT_EQ(0, rtp_header.num_csrcs);
  54   }
  55
  56   void VerifyCastRtpHeader(const RtpCastTestHeader& rtp_header) {
  57     EXPECT_FALSE(rtp_header.is_key_frame);
  58     EXPECT_EQ(expected_frame_id_, rtp_header.frame_id);
  59     EXPECT_EQ(expected_packet_id_, rtp_header.packet_id);
  60     EXPECT_EQ(expected_number_of_packets_ - 1, rtp_header.max_packet_id);
  61     EXPECT_TRUE(rtp_header.is_reference);
  62     EXPECT_EQ(expected_frame_id_ - 1u, rtp_header.reference_frame_id);
  63   }
  64
  65   virtual bool SendPacket(PacketRef packet, const base::Closure& cb) OVERRIDE {
  66     ++packets_sent_;
  67     RtpHeaderParser parser(packet->data.data(), packet->data.size());
  68     RtpCastTestHeader rtp_header;
  69     parser.Parse(&rtp_header);
  70     VerifyRtpHeader(rtp_header);
  71     ++sequence_number_;
  72     ++expected_packet_id_;
  73     return true;
  74   }
  75
  76   int number_of_packets_received() const { return packets_sent_; }
  77
  78   void set_expected_number_of_packets(int expected_number_of_packets) {
  79     expected_number_of_packets_ = expected_number_of_packets;
  80   }
  81
  82   void set_rtp_timestamp(uint32 rtp_timestamp) {
  83     expectd_rtp_timestamp_ = rtp_timestamp;
  84   }
  85
  86   RtpPacketizerConfig config_;
  87   uint32 sequence_number_;
  88   int packets_sent_;
  89   int number_of_packets_;
  90   int expected_number_of_packets_;
  91   // Assuming packets arrive in sequence.
  92   int expected_packet_id_;
  93   uint32 expected_frame_id_;
  94   uint32 expectd_rtp_timestamp_;
  95
  96   DISALLOW_COPY_AND_ASSIGN(TestRtpPacketTransport);
  97 };
  98
  99 class RtpPacketizerTest : public ::testing::Test {
 100  protected:
 101   RtpPacketizerTest()
 102       : task_runner_(new test::FakeSingleThreadTaskRunner(&testing_clock_)),
 103         video_frame_(),
 104         packet_storage_(200) {
 105     config_.sequence_number = kSeqNum;
 106     config_.ssrc = kSsrc;
 107     config_.payload_type = kPayload;
 108     config_.max_payload_length = kMaxPacketLength;
 109     transport_.reset(new TestRtpPacketTransport(config_));
 110     pacer_.reset(new PacedSender(
 111         &testing_clock_, &logging_, transport_.get(), task_runner_));
 112     pacer_->RegisterVideoSsrc(config_.ssrc);
 113     rtp_packetizer_.reset(new RtpPacketizer(
 114         pacer_.get(), &packet_storage_, config_));
 115     video_frame_.key_frame = false;
 116     video_frame_.frame_id = 0;
 117     video_frame_.last_referenced_frame_id = kStartFrameId;
 118     video_frame_.data.assign(kFrameSize, 123);
 119     video_frame_.rtp_timestamp =
 120         GetVideoRtpTimestamp(testing_clock_.NowTicks());
 121   }
 122
 123   void RunTasks(int during_ms) {
 124     for (int i = 0; i < during_ms; ++i) {
 125       // Call process the timers every 1 ms.
 126       testing_clock_.Advance(base::TimeDelta::FromMilliseconds(1));
 127       task_runner_->RunTasks();
 128     }
 129   }
 130
 131   base::SimpleTestTickClock testing_clock_;
 132   scoped_refptr<test::FakeSingleThreadTaskRunner> task_runner_;
 133   EncodedVideoFrame video_frame_;
 134   PacketStorage packet_storage_;
 135   RtpPacketizerConfig config_;
 136   scoped_ptr<TestRtpPacketTransport> transport_;
 137   LoggingImpl logging_;
 138   scoped_ptr<PacedSender> pacer_;
 139   scoped_ptr<RtpPacketizer> rtp_packetizer_;
 140
 141   DISALLOW_COPY_AND_ASSIGN(RtpPacketizerTest);
 142 };
 143
 144 TEST_F(RtpPacketizerTest, SendStandardPackets) {
 145   int expected_num_of_packets = kFrameSize / kMaxPacketLength + 1;
 146   transport_->set_expected_number_of_packets(expected_num_of_packets);
 147   transport_->set_rtp_timestamp(video_frame_.rtp_timestamp);
 148
 149   base::TimeTicks time;
 150   time += base::TimeDelta::FromMilliseconds(kTimestampMs);
 151   rtp_packetizer_->IncomingEncodedVideoFrame(&video_frame_, time);
 152   RunTasks(33 + 1);
 153   EXPECT_EQ(expected_num_of_packets, transport_->number_of_packets_received());
 154 }
 155
 156 TEST_F(RtpPacketizerTest, Stats) {
 157   EXPECT_FALSE(rtp_packetizer_->send_packets_count());
 158   EXPECT_FALSE(rtp_packetizer_->send_octet_count());
 159   // Insert packets at varying lengths.
 160   int expected_num_of_packets = kFrameSize / kMaxPacketLength + 1;
 161   transport_->set_expected_number_of_packets(expected_num_of_packets);
 162   transport_->set_rtp_timestamp(video_frame_.rtp_timestamp);
 163
 164   testing_clock_.Advance(base::TimeDelta::FromMilliseconds(kTimestampMs));
 165   rtp_packetizer_->IncomingEncodedVideoFrame(&video_frame_,
 166                                              testing_clock_.NowTicks());
 167   RunTasks(33 + 1);
 168   EXPECT_EQ(expected_num_of_packets, rtp_packetizer_->send_packets_count());
 169   EXPECT_EQ(kFrameSize, rtp_packetizer_->send_octet_count());
 170   EXPECT_EQ(expected_num_of_packets, transport_->number_of_packets_received());
 171 }
 172
 173 }  // namespace transport
 174 }  // namespace cast
 175 }  // namespace media