media/cast/sender/audio_sender_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 <stdint.h>
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/test/simple_test_tick_clock.h"
  11 #include "media/base/media.h"
  12 #include "media/cast/cast_config.h"
  13 #include "media/cast/cast_environment.h"
  14 #include "media/cast/net/cast_transport_config.h"
  15 #include "media/cast/net/cast_transport_sender_impl.h"
  16 #include "media/cast/sender/audio_sender.h"
  17 #include "media/cast/test/fake_single_thread_task_runner.h"
  18 #include "media/cast/test/utility/audio_utility.h"
  19 #include "testing/gtest/include/gtest/gtest.h"
  20
  21 namespace media {
  22 namespace cast {
  23
  24 namespace {
  25
  26 void SaveOperationalStatus(OperationalStatus* out_status,
  27                            OperationalStatus in_status) {
  28   DVLOG(1) << "OperationalStatus transitioning from " << *out_status << " to "
  29            << in_status;
  30   *out_status = in_status;
  31 }
  32
  33 }  // namespace
  34
  35 class TestPacketSender : public PacketSender {
  36  public:
  37   TestPacketSender() : number_of_rtp_packets_(0), number_of_rtcp_packets_(0) {}
  38
  39   bool SendPacket(PacketRef packet, const base::Closure& cb) final {
  40     if (Rtcp::IsRtcpPacket(&packet->data[0], packet->data.size())) {
  41       ++number_of_rtcp_packets_;
  42     } else {
  43       // Check that at least one RTCP packet was sent before the first RTP
  44       // packet.  This confirms that the receiver will have the necessary lip
  45       // sync info before it has to calculate the playout time of the first
  46       // frame.
  47       if (number_of_rtp_packets_ == 0)
  48         EXPECT_LE(1, number_of_rtcp_packets_);
  49       ++number_of_rtp_packets_;
  50     }
  51     return true;
  52   }
  53
  54   int64 GetBytesSent() final { return 0; }
  55
  56   int number_of_rtp_packets() const { return number_of_rtp_packets_; }
  57
  58   int number_of_rtcp_packets() const { return number_of_rtcp_packets_; }
  59
  60  private:
  61   int number_of_rtp_packets_;
  62   int number_of_rtcp_packets_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(TestPacketSender);
  65 };
  66
  67 class AudioSenderTest : public ::testing::Test {
  68  protected:
  69   AudioSenderTest() {
  70     InitializeMediaLibrary();
  71     testing_clock_ = new base::SimpleTestTickClock();
  72     testing_clock_->Advance(base::TimeTicks::Now() - base::TimeTicks());
  73     task_runner_ = new test::FakeSingleThreadTaskRunner(testing_clock_);
  74     cast_environment_ =
  75         new CastEnvironment(scoped_ptr<base::TickClock>(testing_clock_).Pass(),
  76                             task_runner_,
  77                             task_runner_,
  78                             task_runner_);
  79     audio_config_.codec = CODEC_AUDIO_OPUS;
  80     audio_config_.use_external_encoder = false;
  81     audio_config_.frequency = kDefaultAudioSamplingRate;
  82     audio_config_.channels = 2;
  83     audio_config_.bitrate = kDefaultAudioEncoderBitrate;
  84     audio_config_.rtp_payload_type = 127;
  85
  86     net::IPEndPoint dummy_endpoint;
  87
  88     transport_sender_.reset(new CastTransportSenderImpl(
  89         NULL,
  90         testing_clock_,
  91         net::IPEndPoint(),
  92         dummy_endpoint,
  93         make_scoped_ptr(new base::DictionaryValue),
  94         base::Bind(&UpdateCastTransportStatus),
  95         BulkRawEventsCallback(),
  96         base::TimeDelta(),
  97         task_runner_,
  98         PacketReceiverCallback(),
  99         &transport_));
 100     OperationalStatus operational_status = STATUS_UNINITIALIZED;
 101     audio_sender_.reset(new AudioSender(
 102         cast_environment_,
 103         audio_config_,
 104         base::Bind(&SaveOperationalStatus, &operational_status),
 105         transport_sender_.get()));
 106     task_runner_->RunTasks();
 107     CHECK_EQ(STATUS_INITIALIZED, operational_status);
 108   }
 109
 110   ~AudioSenderTest() override {}
 111
 112   static void UpdateCastTransportStatus(CastTransportStatus status) {
 113     EXPECT_EQ(TRANSPORT_AUDIO_INITIALIZED, status);
 114   }
 115
 116   base::SimpleTestTickClock* testing_clock_;  // Owned by CastEnvironment.
 117   TestPacketSender transport_;
 118   scoped_ptr<CastTransportSenderImpl> transport_sender_;
 119   scoped_refptr<test::FakeSingleThreadTaskRunner> task_runner_;
 120   scoped_ptr<AudioSender> audio_sender_;
 121   scoped_refptr<CastEnvironment> cast_environment_;
 122   AudioSenderConfig audio_config_;
 123 };
 124
 125 TEST_F(AudioSenderTest, Encode20ms) {
 126   const base::TimeDelta kDuration = base::TimeDelta::FromMilliseconds(20);
 127   scoped_ptr<AudioBus> bus(
 128       TestAudioBusFactory(audio_config_.channels,
 129                           audio_config_.frequency,
 130                           TestAudioBusFactory::kMiddleANoteFreq,
 131                           0.5f).NextAudioBus(kDuration));
 132
 133   audio_sender_->InsertAudio(bus.Pass(), testing_clock_->NowTicks());
 134   task_runner_->RunTasks();
 135   EXPECT_LE(1, transport_.number_of_rtp_packets());
 136   EXPECT_LE(1, transport_.number_of_rtcp_packets());
 137 }
 138
 139 TEST_F(AudioSenderTest, RtcpTimer) {
 140   const base::TimeDelta kDuration = base::TimeDelta::FromMilliseconds(20);
 141   scoped_ptr<AudioBus> bus(
 142       TestAudioBusFactory(audio_config_.channels,
 143                           audio_config_.frequency,
 144                           TestAudioBusFactory::kMiddleANoteFreq,
 145                           0.5f).NextAudioBus(kDuration));
 146
 147   audio_sender_->InsertAudio(bus.Pass(), testing_clock_->NowTicks());
 148   task_runner_->RunTasks();
 149
 150   // Make sure that we send at least one RTCP packet.
 151   base::TimeDelta max_rtcp_timeout =
 152       base::TimeDelta::FromMilliseconds(1 + kDefaultRtcpIntervalMs * 3 / 2);
 153   testing_clock_->Advance(max_rtcp_timeout);
 154   task_runner_->RunTasks();
 155   EXPECT_LE(1, transport_.number_of_rtp_packets());
 156   EXPECT_LE(1, transport_.number_of_rtcp_packets());
 157 }
 158
 159 }  // namespace cast
 160 }  // namespace media