Storing raw audio sink for default audio track.

talk/media/webrtc/webrtcvoiceengine_unittest.cc

Index: talk/media/webrtc/webrtcvoiceengine_unittest.cc
diff --git a/talk/media/webrtc/webrtcvoiceengine_unittest.cc b/talk/media/webrtc/webrtcvoiceengine_unittest.cc
index a62bcb225fc7c6111fed44c0a43507f1ecf7b353..f764a01fc8adb6d34ae66feb012ff8f5a542689c 100644
--- a/talk/media/webrtc/webrtcvoiceengine_unittest.cc
+++ b/talk/media/webrtc/webrtcvoiceengine_unittest.cc
@@ -72,6 +72,11 @@ class FakeVoEWrapper : public cricket::VoEWrapper {
 };
 }  // namespace
 
+class FakeAudioSink : public rtc::RefCountedObject<webrtc::AudioSinkInterface> {
+ public:
+  void OnData(const Data& audio) override {}
+};
+
 class WebRtcVoiceEngineTestFake : public testing::Test {
  public:
   WebRtcVoiceEngineTestFake()
@@ -125,6 +130,12 @@ class WebRtcVoiceEngineTestFake : public testing::Test {
     return *send_stream;
   }
 
+  const cricket::FakeAudioReceiveStream& GetRecvStream(uint32_t ssrc) {
+    const auto* recv_stream = call_.GetAudioReceiveStream(ssrc);
+    EXPECT_TRUE(recv_stream);
+    return *recv_stream;
+  }
+
   const webrtc::AudioSendStream::Config& GetSendStreamConfig(uint32_t ssrc) {
     const auto* send_stream = call_.GetAudioSendStream(ssrc);
     EXPECT_TRUE(send_stream);
@@ -3105,6 +3116,57 @@ TEST_F(WebRtcVoiceEngineTestFake, AssociateChannelResetUponDeleteChannnel) {
   EXPECT_EQ(voe_.GetAssociateSendChannel(recv_ch), -1);
 }
 
+TEST_F(WebRtcVoiceEngineTestFake, SetRawAudioSink) {
+  EXPECT_TRUE(SetupEngine());
+  rtc::scoped_refptr<FakeAudioSink> fake_sink = new FakeAudioSink();
+
+  // This should do nothing, since there's no recv stream yet.
+  channel_->SetRawAudioSink(kSsrc1, fake_sink);
+  // Ensure the ref count wasn't incremented.
+  EXPECT_TRUE(fake_sink->HasOneRef());
+
+  EXPECT_TRUE(
+      channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(kSsrc1)));
+  // Now, the channel should latch on to the sink.
+  channel_->SetRawAudioSink(kSsrc1, fake_sink);
+  EXPECT_FALSE(fake_sink->HasOneRef());
+  EXPECT_EQ(fake_sink, GetRecvStream(kSsrc1).sink());
+
+  // Setting a nullptr should release the reference.
+  channel_->SetRawAudioSink(kSsrc1, nullptr);
+  EXPECT_TRUE(fake_sink->HasOneRef());
+}
+
+TEST_F(WebRtcVoiceEngineTestFake, SetRawAudioSinkDefaultRecvStream) {
+  EXPECT_TRUE(SetupEngine());
+  rtc::scoped_refptr<FakeAudioSink> fake_sink_1 = new FakeAudioSink();
+  rtc::scoped_refptr<FakeAudioSink> fake_sink_2 = new FakeAudioSink();
+
+  // Should be able to set a default sink even when no stream exists.
+  channel_->SetRawAudioSink(0, fake_sink_1);
+  EXPECT_FALSE(fake_sink_1->HasOneRef());
+
+  // Create default channel.
+  DeliverPacket(kPcmuFrame, sizeof(kPcmuFrame));
+  EXPECT_EQ(fake_sink_1, GetRecvStream(0x01).sink());
+
+  // Should be able to set the default sink after a stream exists.
+  channel_->SetRawAudioSink(0, fake_sink_2);
+  EXPECT_TRUE(fake_sink_1->HasOneRef());
+  EXPECT_FALSE(fake_sink_2->HasOneRef());
+  EXPECT_EQ(fake_sink_2, GetRecvStream(0x01).sink());
+
+  // If we remove and add a default stream, it should get the same sink.
+  EXPECT_TRUE(channel_->RemoveRecvStream(0x01));
+  DeliverPacket(kPcmuFrame, sizeof(kPcmuFrame));
+  EXPECT_FALSE(fake_sink_2->HasOneRef());
+  EXPECT_EQ(fake_sink_2, GetRecvStream(0x01).sink());
+
+  // Finally, try resetting the default sink.
+  channel_->SetRawAudioSink(0, nullptr);
+  EXPECT_TRUE(fake_sink_2->HasOneRef());
+}
+
 // Tests that the library initializes and shuts down properly.
 TEST(WebRtcVoiceEngineTest, StartupShutdown) {
   cricket::WebRtcVoiceEngine engine;