ABANDONED: Remove the default receive channel in WVoE.

talk/media/webrtc/webrtcvoiceengine_unittest.cc

 /*
  * libjingle
  * Copyright 2008 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 79 matching lines @@
 class WebRtcVoiceEngineTestFake : public testing::Test {
  public:
   WebRtcVoiceEngineTestFake()
       : call_(webrtc::Call::Config()),
         voe_(kAudioCodecs, ARRAY_SIZE(kAudioCodecs)),
         trace_wrapper_(new FakeVoETraceWrapper()),
         engine_(new FakeVoEWrapper(&voe_), trace_wrapper_),
         channel_(nullptr) {
     send_parameters_.codecs.push_back(kPcmuCodec);
     recv_parameters_.codecs.push_back(kPcmuCodec);
-    options_conference_.conference_mode.Set(true);
     options_adjust_agc_.adjust_agc_delta.Set(-10);
   }
-  bool SetupEngineWithoutStream() {
+  bool SetupEngine() {
     if (!engine_.Init(rtc::Thread::Current())) {
       return false;
     }
     channel_ = engine_.CreateChannel(&call_, cricket::AudioOptions());
     return (channel_ != nullptr);
   }
-  bool SetupEngine() {
-    if (!SetupEngineWithoutStream()) {
+  bool SetupEngineWithRecvStream() {
+    if (!SetupEngine()) {
+      return false;
+    }
+    return channel_->AddRecvStream(
+        cricket::StreamParams::CreateLegacy(kSsrc1));
+  }
+  bool SetupEngineWithSendStream() {
+    if (!SetupEngine()) {
       return false;
     }
     return channel_->AddSendStream(
         cricket::StreamParams::CreateLegacy(kSsrc1));
   }
   void SetupForMultiSendStream() {
-    EXPECT_TRUE(SetupEngine());
+    EXPECT_TRUE(SetupEngineWithSendStream());
     // Remove stream added in Setup, which is corresponding to default channel.
     int default_channel_num = voe_.GetLastChannel();
     uint32 default_send_ssrc = 0u;
     EXPECT_EQ(0, voe_.GetLocalSSRC(default_channel_num, default_send_ssrc));
     EXPECT_EQ(kSsrc1, default_send_ssrc);
     EXPECT_TRUE(channel_->RemoveSendStream(default_send_ssrc));
 
     // Verify the default channel still exists.
     EXPECT_EQ(0, voe_.GetLocalSSRC(default_channel_num, default_send_ssrc));
   }
@@ skipping 70 matching lines @@
     parameters.max_bandwidth_bps = max_bitrate;
     EXPECT_EQ(expected_result, channel_->SetSendParameters(parameters));
 
     int channel_num = voe_.GetLastChannel();
     webrtc::CodecInst temp_codec;
     EXPECT_FALSE(voe_.GetSendCodec(channel_num, temp_codec));
     EXPECT_EQ(expected_bitrate, temp_codec.rate);
   }
 
   void TestSetSendRtpHeaderExtensions(const std::string& ext) {
-    EXPECT_TRUE(SetupEngineWithoutStream());
+    EXPECT_TRUE(SetupEngine());
     int channel_num = voe_.GetLastChannel();
 
     // Ensure extensions are off by default.
     EXPECT_EQ(-1, voe_.GetSendRtpExtensionId(channel_num, ext));
 
     // Ensure unknown extensions won't cause an error.
     send_parameters_.extensions.push_back(cricket::RtpHeaderExtension(
         "urn:ietf:params:unknownextention", 1));
     EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
     EXPECT_EQ(-1, voe_.GetSendRtpExtensionId(channel_num, ext));
@@ skipping 21 matching lines @@
 
     // Ensure all extensions go back off with an empty list.
     send_parameters_.codecs.push_back(kPcmuCodec);
     send_parameters_.extensions.clear();
     EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
     EXPECT_EQ(-1, voe_.GetSendRtpExtensionId(channel_num, ext));
     EXPECT_EQ(-1, voe_.GetSendRtpExtensionId(new_channel_num, ext));
   }
 
   void TestSetRecvRtpHeaderExtensions(const std::string& ext) {
-    EXPECT_TRUE(SetupEngineWithoutStream());
+    EXPECT_TRUE(SetupEngineWithRecvStream());
     int channel_num = voe_.GetLastChannel();
 
     // Ensure extensions are off by default.
     EXPECT_EQ(-1, voe_.GetReceiveRtpExtensionId(channel_num, ext));
 
     cricket::AudioRecvParameters parameters;
     // Ensure unknown extensions won't cause an error.
     parameters.extensions.push_back(cricket::RtpHeaderExtension(
         "urn:ietf:params:unknownextention", 1));
     EXPECT_TRUE(channel_->SetRecvParameters(parameters));
     EXPECT_EQ(-1, voe_.GetReceiveRtpExtensionId(channel_num, ext));
 
     // Ensure extensions stay off with an empty list of headers.
     parameters.extensions.clear();
     EXPECT_TRUE(channel_->SetRecvParameters(parameters));
     EXPECT_EQ(-1, voe_.GetReceiveRtpExtensionId(channel_num, ext));
 
     // Ensure extension is set properly.
     const int id = 2;
     parameters.extensions.push_back(cricket::RtpHeaderExtension(ext, id));
     EXPECT_TRUE(channel_->SetRecvParameters(parameters));
     EXPECT_EQ(id, voe_.GetReceiveRtpExtensionId(channel_num, ext));
 
     // Ensure extension is set properly on new channel.
     // The first stream to occupy the default channel.
     EXPECT_TRUE(channel_->AddRecvStream(
-        cricket::StreamParams::CreateLegacy(345)));
-    EXPECT_TRUE(channel_->AddRecvStream(
-        cricket::StreamParams::CreateLegacy(456)));
+        cricket::StreamParams::CreateLegacy(kSsrc2)));
     int new_channel_num = voe_.GetLastChannel();
     EXPECT_NE(channel_num, new_channel_num);
     EXPECT_EQ(id, voe_.GetReceiveRtpExtensionId(new_channel_num, ext));
 
     // Ensure all extensions go back off with an empty list.
     parameters.extensions.clear();
     EXPECT_TRUE(channel_->SetRecvParameters(parameters));
     EXPECT_EQ(-1, voe_.GetReceiveRtpExtensionId(channel_num, ext));
     EXPECT_EQ(-1, voe_.GetReceiveRtpExtensionId(new_channel_num, ext));
   }
 
  protected:
   cricket::FakeCall call_;
   cricket::FakeWebRtcVoiceEngine voe_;
   FakeVoETraceWrapper* trace_wrapper_;
   cricket::WebRtcVoiceEngine engine_;
   cricket::VoiceMediaChannel* channel_;
 
   cricket::AudioSendParameters send_parameters_;
   cricket::AudioRecvParameters recv_parameters_;
-  cricket::AudioOptions options_conference_;
   cricket::AudioOptions options_adjust_agc_;
 };
 
 // Tests that our stub library "works".
 TEST_F(WebRtcVoiceEngineTestFake, StartupShutdown) {
   EXPECT_FALSE(voe_.IsInited());
   EXPECT_TRUE(engine_.Init(rtc::Thread::Current()));
   EXPECT_TRUE(voe_.IsInited());
   engine_.Terminate();
   EXPECT_FALSE(voe_.IsInited());
@@ skipping 62 matching lines @@
   codec = kIsacCodec;
   codec.bitrate = 32000;
   EXPECT_TRUE(engine_.FindWebRtcCodec(codec, &codec_inst));
   EXPECT_EQ(codec.id, codec_inst.pltype);
   EXPECT_EQ(32000, codec_inst.rate);
 }
 
 // Test that we set our inbound codecs properly, including changing PT.
 TEST_F(WebRtcVoiceEngineTestFake, SetRecvCodecs) {
   EXPECT_TRUE(SetupEngine());
-  int channel_num = voe_.GetLastChannel();
   cricket::AudioRecvParameters parameters;
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   parameters.codecs.push_back(kTelephoneEventCodec);
   parameters.codecs[0].id = 106;  // collide with existing telephone-event
   parameters.codecs[2].id = 126;
   EXPECT_TRUE(channel_->SetRecvParameters(parameters));
+  EXPECT_TRUE(channel_->AddRecvStream(
+      cricket::StreamParams::CreateLegacy(kSsrc1)));
+  int channel_num = voe_.GetLastChannel();
   webrtc::CodecInst gcodec;
   rtc::strcpyn(gcodec.plname, ARRAY_SIZE(gcodec.plname), "ISAC");
   gcodec.plfreq = 16000;
   gcodec.channels = 1;
   EXPECT_EQ(0, voe_.GetRecPayloadType(channel_num, gcodec));
   EXPECT_EQ(106, gcodec.pltype);
   EXPECT_STREQ("ISAC", gcodec.plname);
   rtc::strcpyn(gcodec.plname, ARRAY_SIZE(gcodec.plname),
       "telephone-event");
   gcodec.plfreq = 8000;
@@ skipping 24 matching lines @@
 // Test that we can decode OPUS without stereo parameters.
 TEST_F(WebRtcVoiceEngineTestFake, SetRecvCodecsWithOpusNoStereo) {
   EXPECT_TRUE(SetupEngine());
   cricket::AudioRecvParameters parameters;
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   parameters.codecs.push_back(kOpusCodec);
   EXPECT_TRUE(channel_->SetRecvParameters(parameters));
   EXPECT_TRUE(channel_->AddRecvStream(
       cricket::StreamParams::CreateLegacy(kSsrc1)));
-  int channel_num2 = voe_.GetLastChannel();
+  int channel_num = voe_.GetLastChannel();
   webrtc::CodecInst opus;
   engine_.FindWebRtcCodec(kOpusCodec, &opus);
   // Even without stereo parameters, recv codecs still specify channels = 2.
   EXPECT_EQ(2, opus.channels);
   EXPECT_EQ(111, opus.pltype);
   EXPECT_STREQ("opus", opus.plname);
   opus.pltype = 0;
-  EXPECT_EQ(0, voe_.GetRecPayloadType(channel_num2, opus));
+  EXPECT_EQ(0, voe_.GetRecPayloadType(channel_num, opus));
   EXPECT_EQ(111, opus.pltype);
 }
 
 // Test that we can decode OPUS with stereo = 0.
 TEST_F(WebRtcVoiceEngineTestFake, SetRecvCodecsWithOpus0Stereo) {
   EXPECT_TRUE(SetupEngine());
   cricket::AudioRecvParameters parameters;
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   parameters.codecs.push_back(kOpusCodec);
@@ skipping 58 matching lines @@
   rtc::strcpyn(gcodec.plname, ARRAY_SIZE(gcodec.plname),
       "telephone-event");
   gcodec.plfreq = 8000;
   gcodec.channels = 1;
   EXPECT_EQ(0, voe_.GetRecPayloadType(channel_num2, gcodec));
   EXPECT_EQ(126, gcodec.pltype);
   EXPECT_STREQ("telephone-event", gcodec.plname);
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, SetRecvCodecsAfterAddingStreams) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithRecvStream());
   cricket::AudioRecvParameters parameters;
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs[0].id = 106;  // collide with existing telephone-event
-  EXPECT_TRUE(channel_->AddRecvStream(
-      cricket::StreamParams::CreateLegacy(kSsrc1)));
   EXPECT_TRUE(channel_->SetRecvParameters(parameters));
 
   int channel_num2 = voe_.GetLastChannel();
   webrtc::CodecInst gcodec;
   rtc::strcpyn(gcodec.plname, ARRAY_SIZE(gcodec.plname), "ISAC");
   gcodec.plfreq = 16000;
   gcodec.channels = 1;
   EXPECT_EQ(0, voe_.GetRecPayloadType(channel_num2, gcodec));
   EXPECT_EQ(106, gcodec.pltype);
   EXPECT_STREQ("ISAC", gcodec.plname);
 }
 
 // Test that we can apply the same set of codecs again while playing.
 TEST_F(WebRtcVoiceEngineTestFake, SetRecvCodecsWhilePlaying) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithRecvStream());
   cricket::AudioRecvParameters parameters;
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kCn16000Codec);
   EXPECT_TRUE(channel_->SetRecvParameters(parameters));
   EXPECT_TRUE(channel_->SetPlayout(true));
   EXPECT_TRUE(channel_->SetRecvParameters(parameters));
 
   // Changing the payload type of a codec should fail.
   parameters.codecs[0].id = 127;
   EXPECT_FALSE(channel_->SetRecvParameters(parameters));
   int channel_num = voe_.GetLastChannel();
   EXPECT_TRUE(voe_.GetPlayout(channel_num));
 }
 
 // Test that we can add a codec while playing.
 TEST_F(WebRtcVoiceEngineTestFake, AddRecvCodecsWhilePlaying) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithRecvStream());
   cricket::AudioRecvParameters parameters;
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kCn16000Codec);
   EXPECT_TRUE(channel_->SetRecvParameters(parameters));
   EXPECT_TRUE(channel_->SetPlayout(true));
 
   parameters.codecs.push_back(kOpusCodec);
   EXPECT_TRUE(channel_->SetRecvParameters(parameters));
   int channel_num = voe_.GetLastChannel();
   EXPECT_TRUE(voe_.GetPlayout(channel_num));
   webrtc::CodecInst gcodec;
   EXPECT_TRUE(engine_.FindWebRtcCodec(kOpusCodec, &gcodec));
   EXPECT_EQ(kOpusCodec.id, gcodec.pltype);
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, SetSendBandwidthAuto) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
 
   // Test that when autobw is enabled, bitrate is kept as the default
   // value. autobw is enabled for the following tests because the target
   // bitrate is <= 0.
 
   // ISAC, default bitrate == 32000.
   TestSendBandwidth(kIsacCodec, 0, true, 32000);
 
   // PCMU, default bitrate == 64000.
   TestSendBandwidth(kPcmuCodec, -1, true, 64000);
 
   // opus, default bitrate == 64000.
   TestSendBandwidth(kOpusCodec, -1, true, 64000);
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, SetMaxSendBandwidthMultiRateAsCaller) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
 
   // Test that the bitrate of a multi-rate codec is always the maximum.
 
   // ISAC, default bitrate == 32000.
   TestSendBandwidth(kIsacCodec, 128000, true, 128000);
   TestSendBandwidth(kIsacCodec, 16000, true, 16000);
 
   // opus, default bitrate == 64000.
   TestSendBandwidth(kOpusCodec, 96000, true, 96000);
   TestSendBandwidth(kOpusCodec, 48000, true, 48000);
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, SetMaxSendBandwidthFixedRateAsCaller) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
 
   // Test that we can only set a maximum bitrate for a fixed-rate codec
   // if it's bigger than the fixed rate.
 
   // PCMU, fixed bitrate == 64000.
   TestSendBandwidth(kPcmuCodec, 0, true, 64000);
   TestSendBandwidth(kPcmuCodec, 1, false, 64000);
   TestSendBandwidth(kPcmuCodec, 128000, true, 64000);
   TestSendBandwidth(kPcmuCodec, 32000, false, 64000);
   TestSendBandwidth(kPcmuCodec, 64000, true, 64000);
   TestSendBandwidth(kPcmuCodec, 63999, false, 64000);
   TestSendBandwidth(kPcmuCodec, 64001, true, 64000);
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, SetMaxSendBandwidthMultiRateAsCallee) {
-  EXPECT_TRUE(SetupEngineWithoutStream());
+  EXPECT_TRUE(SetupEngine());
   const int kDesiredBitrate = 128000;
   cricket::AudioSendParameters parameters;
   parameters.codecs = engine_.codecs();
   parameters.max_bandwidth_bps = kDesiredBitrate;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
 
   EXPECT_TRUE(channel_->AddSendStream(
       cricket::StreamParams::CreateLegacy(kSsrc1)));
 
   int channel_num = voe_.GetLastChannel();
   webrtc::CodecInst codec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, codec));
   EXPECT_EQ(kDesiredBitrate, codec.rate);
 }
 
 // Test that bitrate cannot be set for CBR codecs.
 // Bitrate is ignored if it is higher than the fixed bitrate.
 // Bitrate less then the fixed bitrate is an error.
 TEST_F(WebRtcVoiceEngineTestFake, SetMaxSendBandwidthCbr) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
 
   // PCMU, default bitrate == 64000.
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
   int channel_num = voe_.GetLastChannel();
   webrtc::CodecInst codec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, codec));
   EXPECT_EQ(64000, codec.rate);
 
   send_parameters_.max_bandwidth_bps = 128000;
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, codec));
   EXPECT_EQ(64000, codec.rate);
 
   send_parameters_.max_bandwidth_bps = 128;
   EXPECT_FALSE(channel_->SetSendParameters(send_parameters_));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, codec));
   EXPECT_EQ(64000, codec.rate);
 }
 
 // Test that we apply codecs properly.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecs) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   parameters.codecs.push_back(kRedCodec);
   parameters.codecs[0].id = 96;
   parameters.codecs[0].bitrate = 48000;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(1, voe_.GetNumSetSendCodecs());
   int channel_num = voe_.GetLastChannel();
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(96, gcodec.pltype);
   EXPECT_EQ(48000, gcodec.rate);
   EXPECT_STREQ("ISAC", gcodec.plname);
   EXPECT_FALSE(voe_.GetVAD(channel_num));
   EXPECT_FALSE(voe_.GetRED(channel_num));
   EXPECT_EQ(13, voe_.GetSendCNPayloadType(channel_num, false));
   EXPECT_EQ(105, voe_.GetSendCNPayloadType(channel_num, true));
   EXPECT_EQ(106, voe_.GetSendTelephoneEventPayloadType(channel_num));
 }
 
 // Test that VoE Channel doesn't call SetSendCodec again if same codec is tried
 // to apply.
 TEST_F(WebRtcVoiceEngineTestFake, DontResetSetSendCodec) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   parameters.codecs.push_back(kRedCodec);
   parameters.codecs[0].id = 96;
   parameters.codecs[0].bitrate = 48000;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(1, voe_.GetNumSetSendCodecs());
   // Calling SetSendCodec again with same codec which is already set.
   // In this case media channel shouldn't send codec to VoE.
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(1, voe_.GetNumSetSendCodecs());
 }
 
 // Verify that G722 is set with 16000 samples per second to WebRTC.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecG722) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kG722CodecSdp);
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("G722", gcodec.plname);
   EXPECT_EQ(1, gcodec.channels);
   EXPECT_EQ(16000, gcodec.plfreq);
 }
 
 // Test that if clockrate is not 48000 for opus, we fail.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusBadClockrate) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   parameters.codecs[0].clockrate = 50000;
   EXPECT_FALSE(channel_->SetSendParameters(parameters));
 }
 
 // Test that if channels=0 for opus, we fail.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusBad0ChannelsNoStereo) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   parameters.codecs[0].channels = 0;
   EXPECT_FALSE(channel_->SetSendParameters(parameters));
 }
 
 // Test that if channels=0 for opus, we fail.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusBad0Channels1Stereo) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   parameters.codecs[0].channels = 0;
   parameters.codecs[0].params["stereo"] = "1";
   EXPECT_FALSE(channel_->SetSendParameters(parameters));
 }
 
 // Test that if channel is 1 for opus and there's no stereo, we fail.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpus1ChannelNoStereo) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   parameters.codecs[0].channels = 1;
   EXPECT_FALSE(channel_->SetSendParameters(parameters));
 }
 
 // Test that if channel is 1 for opus and stereo=0, we fail.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusBad1Channel0Stereo) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   parameters.codecs[0].channels = 1;
   parameters.codecs[0].params["stereo"] = "0";
   EXPECT_FALSE(channel_->SetSendParameters(parameters));
 }
 
 // Test that if channel is 1 for opus and stereo=1, we fail.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusBad1Channel1Stereo) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   parameters.codecs[0].channels = 1;
   parameters.codecs[0].params["stereo"] = "1";
   EXPECT_FALSE(channel_->SetSendParameters(parameters));
 }
 
 // Test that with bitrate=0 and no stereo,
 // channels and bitrate are 1 and 32000.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusGood0BitrateNoStereo) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("opus", gcodec.plname);
   EXPECT_EQ(1, gcodec.channels);
   EXPECT_EQ(32000, gcodec.rate);
 }
 
 // Test that with bitrate=0 and stereo=0,
 // channels and bitrate are 1 and 32000.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusGood0Bitrate0Stereo) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   parameters.codecs[0].params["stereo"] = "0";
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("opus", gcodec.plname);
   EXPECT_EQ(1, gcodec.channels);
   EXPECT_EQ(32000, gcodec.rate);
 }
 
 // Test that with bitrate=invalid and stereo=0,
 // channels and bitrate are 1 and 32000.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusGoodXBitrate0Stereo) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].params["stereo"] = "0";
   webrtc::CodecInst gcodec;
 
   // bitrate that's out of the range between 6000 and 510000 will be clamped.
   parameters.codecs[0].bitrate = 5999;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("opus", gcodec.plname);
   EXPECT_EQ(1, gcodec.channels);
   EXPECT_EQ(6000, gcodec.rate);
 
   parameters.codecs[0].bitrate = 510001;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("opus", gcodec.plname);
   EXPECT_EQ(1, gcodec.channels);
   EXPECT_EQ(510000, gcodec.rate);
 }
 
 // Test that with bitrate=0 and stereo=1,
 // channels and bitrate are 2 and 64000.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusGood0Bitrate1Stereo) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   parameters.codecs[0].params["stereo"] = "1";
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("opus", gcodec.plname);
   EXPECT_EQ(2, gcodec.channels);
   EXPECT_EQ(64000, gcodec.rate);
 }
 
 // Test that with bitrate=invalid and stereo=1,
 // channels and bitrate are 2 and 64000.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusGoodXBitrate1Stereo) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].params["stereo"] = "1";
   webrtc::CodecInst gcodec;
 
   // bitrate that's out of the range between 6000 and 510000 will be clamped.
   parameters.codecs[0].bitrate = 5999;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("opus", gcodec.plname);
   EXPECT_EQ(2, gcodec.channels);
   EXPECT_EQ(6000, gcodec.rate);
 
   parameters.codecs[0].bitrate = 510001;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("opus", gcodec.plname);
   EXPECT_EQ(2, gcodec.channels);
   EXPECT_EQ(510000, gcodec.rate);
 }
 
 // Test that with bitrate=N and stereo unset,
 // channels and bitrate are 1 and N.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusGoodNBitrateNoStereo) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 96000;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(111, gcodec.pltype);
   EXPECT_EQ(96000, gcodec.rate);
   EXPECT_STREQ("opus", gcodec.plname);
   EXPECT_EQ(1, gcodec.channels);
   EXPECT_EQ(48000, gcodec.plfreq);
 }
 
 // Test that with bitrate=N and stereo=0,
 // channels and bitrate are 1 and N.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusGoodNBitrate0Stereo) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 30000;
   parameters.codecs[0].params["stereo"] = "0";
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(1, gcodec.channels);
   EXPECT_EQ(30000, gcodec.rate);
   EXPECT_STREQ("opus", gcodec.plname);
 }
 
 // Test that with bitrate=N and without any parameters,
 // channels and bitrate are 1 and N.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusGoodNBitrateNoParameters) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 30000;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(1, gcodec.channels);
   EXPECT_EQ(30000, gcodec.rate);
   EXPECT_STREQ("opus", gcodec.plname);
 }
 
 // Test that with bitrate=N and stereo=1,
 // channels and bitrate are 2 and N.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusGoodNBitrate1Stereo) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 30000;
   parameters.codecs[0].params["stereo"] = "1";
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(2, gcodec.channels);
   EXPECT_EQ(30000, gcodec.rate);
   EXPECT_STREQ("opus", gcodec.plname);
 }
 
 // Test that bitrate will be overridden by the "maxaveragebitrate" parameter.
 // Also test that the "maxaveragebitrate" can't be set to values outside the
 // range of 6000 and 510000
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusMaxAverageBitrate) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 30000;
   webrtc::CodecInst gcodec;
 
   // Ignore if less than 6000.
   parameters.codecs[0].params["maxaveragebitrate"] = "5999";
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(6000, gcodec.rate);
 
   // Ignore if larger than 510000.
   parameters.codecs[0].params["maxaveragebitrate"] = "510001";
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(510000, gcodec.rate);
 
   parameters.codecs[0].params["maxaveragebitrate"] = "200000";
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(200000, gcodec.rate);
 }
 
 // Test that we can enable NACK with opus as caller.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecEnableNackAsCaller) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].AddFeedbackParam(
       cricket::FeedbackParam(cricket::kRtcpFbParamNack,
                              cricket::kParamValueEmpty));
   EXPECT_FALSE(voe_.GetNACK(channel_num));
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_TRUE(voe_.GetNACK(channel_num));
 }
 
 // Test that we can enable NACK with opus as callee.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecEnableNackAsCallee) {
-  EXPECT_TRUE(SetupEngineWithoutStream());
+  EXPECT_TRUE(SetupEngine());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].AddFeedbackParam(
       cricket::FeedbackParam(cricket::kRtcpFbParamNack,
                              cricket::kParamValueEmpty));
   EXPECT_FALSE(voe_.GetNACK(channel_num));
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_FALSE(voe_.GetNACK(channel_num));
 
   EXPECT_TRUE(channel_->AddSendStream(
       cricket::StreamParams::CreateLegacy(kSsrc1)));
   EXPECT_TRUE(voe_.GetNACK(channel_num));
 }
 
 // Test that we can enable NACK on receive streams.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecEnableNackRecvStreams) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num1 = voe_.GetLastChannel();
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(2)));
   int channel_num2 = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].AddFeedbackParam(
       cricket::FeedbackParam(cricket::kRtcpFbParamNack,
                              cricket::kParamValueEmpty));
   EXPECT_FALSE(voe_.GetNACK(channel_num1));
   EXPECT_FALSE(voe_.GetNACK(channel_num2));
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_TRUE(voe_.GetNACK(channel_num1));
   EXPECT_TRUE(voe_.GetNACK(channel_num2));
 }
 
 // Test that we can disable NACK.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecDisableNack) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].AddFeedbackParam(
       cricket::FeedbackParam(cricket::kRtcpFbParamNack,
                              cricket::kParamValueEmpty));
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_TRUE(voe_.GetNACK(channel_num));
 
   parameters.codecs.clear();
   parameters.codecs.push_back(kOpusCodec);
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_FALSE(voe_.GetNACK(channel_num));
 }
 
 // Test that we can disable NACK on receive streams.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecDisableNackRecvStreams) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num1 = voe_.GetLastChannel();
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(2)));
   int channel_num2 = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].AddFeedbackParam(
       cricket::FeedbackParam(cricket::kRtcpFbParamNack,
                              cricket::kParamValueEmpty));
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_TRUE(voe_.GetNACK(channel_num1));
   EXPECT_TRUE(voe_.GetNACK(channel_num2));
 
   parameters.codecs.clear();
   parameters.codecs.push_back(kOpusCodec);
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_FALSE(voe_.GetNACK(channel_num1));
   EXPECT_FALSE(voe_.GetNACK(channel_num2));
 }
 
 // Test that NACK is enabled on a new receive stream.
 TEST_F(WebRtcVoiceEngineTestFake, AddRecvStreamEnableNack) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kCn16000Codec);
   parameters.codecs[0].AddFeedbackParam(
       cricket::FeedbackParam(cricket::kRtcpFbParamNack,
                              cricket::kParamValueEmpty));
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_TRUE(voe_.GetNACK(channel_num));
 
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(2)));
   channel_num = voe_.GetLastChannel();
   EXPECT_TRUE(voe_.GetNACK(channel_num));
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(3)));
   channel_num = voe_.GetLastChannel();
   EXPECT_TRUE(voe_.GetNACK(channel_num));
 }
 
 // Test that without useinbandfec, Opus FEC is off.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecNoOpusFec) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_FALSE(voe_.GetCodecFEC(channel_num));
 }
 
 // Test that with useinbandfec=0, Opus FEC is off.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusDisableFec) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   parameters.codecs[0].params["useinbandfec"] = "0";
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_FALSE(voe_.GetCodecFEC(channel_num));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("opus", gcodec.plname);
   EXPECT_EQ(1, gcodec.channels);
   EXPECT_EQ(32000, gcodec.rate);
 }
 
 // Test that with useinbandfec=1, Opus FEC is on.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusEnableFec) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   parameters.codecs[0].params["useinbandfec"] = "1";
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_TRUE(voe_.GetCodecFEC(channel_num));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("opus", gcodec.plname);
   EXPECT_EQ(1, gcodec.channels);
   EXPECT_EQ(32000, gcodec.rate);
 }
 
 // Test that with useinbandfec=1, stereo=1, Opus FEC is on.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecOpusEnableFecStereo) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   parameters.codecs[0].params["stereo"] = "1";
   parameters.codecs[0].params["useinbandfec"] = "1";
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_TRUE(voe_.GetCodecFEC(channel_num));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("opus", gcodec.plname);
   EXPECT_EQ(2, gcodec.channels);
   EXPECT_EQ(64000, gcodec.rate);
 }
 
 // Test that with non-Opus, codec FEC is off.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecIsacNoFec) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kIsacCodec);
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_FALSE(voe_.GetCodecFEC(channel_num));
 }
 
 // Test the with non-Opus, even if useinbandfec=1, FEC is off.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecIsacWithParamNoFec) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs[0].params["useinbandfec"] = "1";
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_FALSE(voe_.GetCodecFEC(channel_num));
 }
 
 // Test that Opus FEC status can be changed.
 TEST_F(WebRtcVoiceEngineTestFake, ChangeOpusFecStatus) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_FALSE(voe_.GetCodecFEC(channel_num));
   parameters.codecs[0].params["useinbandfec"] = "1";
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_TRUE(voe_.GetCodecFEC(channel_num));
 }
 
 // Test maxplaybackrate <= 8000 triggers Opus narrow band mode.
 TEST_F(WebRtcVoiceEngineTestFake, SetOpusMaxPlaybackRateNb) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   parameters.codecs[0].SetParam(cricket::kCodecParamMaxPlaybackRate, 8000);
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(cricket::kOpusBandwidthNb,
             voe_.GetMaxEncodingBandwidth(channel_num));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("opus", gcodec.plname);
 
   EXPECT_EQ(12000, gcodec.rate);
   parameters.codecs[0].SetParam(cricket::kCodecParamStereo, "1");
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(24000, gcodec.rate);
 }
 
 // Test 8000 < maxplaybackrate <= 12000 triggers Opus medium band mode.
 TEST_F(WebRtcVoiceEngineTestFake, SetOpusMaxPlaybackRateMb) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   parameters.codecs[0].SetParam(cricket::kCodecParamMaxPlaybackRate, 8001);
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(cricket::kOpusBandwidthMb,
             voe_.GetMaxEncodingBandwidth(channel_num));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("opus", gcodec.plname);
 
   EXPECT_EQ(20000, gcodec.rate);
   parameters.codecs[0].SetParam(cricket::kCodecParamStereo, "1");
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(40000, gcodec.rate);
 }
 
 // Test 12000 < maxplaybackrate <= 16000 triggers Opus wide band mode.
 TEST_F(WebRtcVoiceEngineTestFake, SetOpusMaxPlaybackRateWb) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   parameters.codecs[0].SetParam(cricket::kCodecParamMaxPlaybackRate, 12001);
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(cricket::kOpusBandwidthWb,
             voe_.GetMaxEncodingBandwidth(channel_num));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("opus", gcodec.plname);
 
   EXPECT_EQ(20000, gcodec.rate);
   parameters.codecs[0].SetParam(cricket::kCodecParamStereo, "1");
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(40000, gcodec.rate);
 }
 
 // Test 16000 < maxplaybackrate <= 24000 triggers Opus super wide band mode.
 TEST_F(WebRtcVoiceEngineTestFake, SetOpusMaxPlaybackRateSwb) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   parameters.codecs[0].SetParam(cricket::kCodecParamMaxPlaybackRate, 16001);
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(cricket::kOpusBandwidthSwb,
             voe_.GetMaxEncodingBandwidth(channel_num));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("opus", gcodec.plname);
 
   EXPECT_EQ(32000, gcodec.rate);
   parameters.codecs[0].SetParam(cricket::kCodecParamStereo, "1");
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(64000, gcodec.rate);
 }
 
 // Test 24000 < maxplaybackrate triggers Opus full band mode.
 TEST_F(WebRtcVoiceEngineTestFake, SetOpusMaxPlaybackRateFb) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].bitrate = 0;
   parameters.codecs[0].SetParam(cricket::kCodecParamMaxPlaybackRate, 24001);
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(cricket::kOpusBandwidthFb,
             voe_.GetMaxEncodingBandwidth(channel_num));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("opus", gcodec.plname);
 
   EXPECT_EQ(32000, gcodec.rate);
   parameters.codecs[0].SetParam(cricket::kCodecParamStereo, "1");
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(64000, gcodec.rate);
 }
 
 // Test Opus that without maxplaybackrate, default playback rate is used.
 TEST_F(WebRtcVoiceEngineTestFake, DefaultOpusMaxPlaybackRate) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(cricket::kOpusBandwidthFb,
             voe_.GetMaxEncodingBandwidth(channel_num));
 }
 
 // Test the with non-Opus, maxplaybackrate has no effect.
 TEST_F(WebRtcVoiceEngineTestFake, SetNonOpusMaxPlaybackRate) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs[0].SetParam(cricket::kCodecParamMaxPlaybackRate, 32000);
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(0, voe_.GetMaxEncodingBandwidth(channel_num));
 }
 
 // Test maxplaybackrate can be set on two streams.
 TEST_F(WebRtcVoiceEngineTestFake, SetOpusMaxPlaybackRateOnTwoStreams) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   // Default bandwidth is 24000.
   EXPECT_EQ(cricket::kOpusBandwidthFb,
             voe_.GetMaxEncodingBandwidth(channel_num));
 
   parameters.codecs[0].SetParam(cricket::kCodecParamMaxPlaybackRate, 8000);
 
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(cricket::kOpusBandwidthNb,
             voe_.GetMaxEncodingBandwidth(channel_num));
 
   channel_->AddSendStream(cricket::StreamParams::CreateLegacy(kSsrc2));
   channel_num = voe_.GetLastChannel();
   EXPECT_EQ(cricket::kOpusBandwidthNb,
             voe_.GetMaxEncodingBandwidth(channel_num));
 }
 
 // Test that with usedtx=0, Opus DTX is off.
 TEST_F(WebRtcVoiceEngineTestFake, DisableOpusDtxOnOpus) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].params["usedtx"] = "0";
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_FALSE(voe_.GetOpusDtx(channel_num));
 }
 
 // Test that with usedtx=1, Opus DTX is on.
 TEST_F(WebRtcVoiceEngineTestFake, EnableOpusDtxOnOpus) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].params["usedtx"] = "1";
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_TRUE(voe_.GetOpusDtx(channel_num));
   EXPECT_FALSE(voe_.GetVAD(channel_num));  // Opus DTX should not affect VAD.
 }
 
 // Test that usedtx=1 works with stereo Opus.
 TEST_F(WebRtcVoiceEngineTestFake, EnableOpusDtxOnOpusStereo) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].params["usedtx"] = "1";
   parameters.codecs[0].params["stereo"] = "1";
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_TRUE(voe_.GetOpusDtx(channel_num));
   EXPECT_FALSE(voe_.GetVAD(channel_num));   // Opus DTX should not affect VAD.
 }
 
 // Test that usedtx=1 does not work with non Opus.
 TEST_F(WebRtcVoiceEngineTestFake, CannotEnableOpusDtxOnNonOpus) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs[0].params["usedtx"] = "1";
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_FALSE(voe_.GetOpusDtx(channel_num));
 }
 
 // Test that we can switch back and forth between Opus and ISAC with CN.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsIsacOpusSwitching) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters opus_parameters;
   opus_parameters.codecs.push_back(kOpusCodec);
   EXPECT_TRUE(channel_->SetSendParameters(opus_parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(111, gcodec.pltype);
   EXPECT_STREQ("opus", gcodec.plname);
 
   cricket::AudioSendParameters isac_parameters;
   isac_parameters.codecs.push_back(kIsacCodec);
   isac_parameters.codecs.push_back(kCn16000Codec);
   isac_parameters.codecs.push_back(kOpusCodec);
   EXPECT_TRUE(channel_->SetSendParameters(isac_parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(103, gcodec.pltype);
   EXPECT_STREQ("ISAC", gcodec.plname);
 
   EXPECT_TRUE(channel_->SetSendParameters(opus_parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(111, gcodec.pltype);
   EXPECT_STREQ("opus", gcodec.plname);
 }
 
 // Test that we handle various ways of specifying bitrate.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsBitrate) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kIsacCodec);  // bitrate == 32000
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(103, gcodec.pltype);
   EXPECT_STREQ("ISAC", gcodec.plname);
   EXPECT_EQ(32000, gcodec.rate);
 
@@ skipping 29 matching lines @@
   parameters.codecs[0].bitrate = 0;         // bitrate == default
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(111, gcodec.pltype);
   EXPECT_STREQ("opus", gcodec.plname);
   EXPECT_EQ(32000, gcodec.rate);
 }
 
 // Test that we could set packet size specified in kCodecParamPTime.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsPTimeAsPacketSize) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kOpusCodec);
   parameters.codecs[0].SetParam(cricket::kCodecParamPTime, 40); // Within range.
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(1920, gcodec.pacsize);  // Opus gets 40ms.
 
   parameters.codecs[0].SetParam(cricket::kCodecParamPTime, 5); // Below range.
@@ skipping 14 matching lines @@
 
   parameters.codecs[0] = kG722CodecSdp;  // Try G722 @8kHz as negotiated in SDP.
   parameters.codecs[0].SetParam(cricket::kCodecParamPTime, 40);
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(640, gcodec.pacsize);  // G722 gets 40ms @16kHz as defined in VoE.
 }
 
 // Test that we fail if no codecs are specified.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsNoCodecs) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   cricket::AudioSendParameters parameters;
   EXPECT_FALSE(channel_->SetSendParameters(parameters));
 }
 
 // Test that we can set send codecs even with telephone-event codec as the first
 // one on the list.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsDTMFOnTop) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kTelephoneEventCodec);
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   parameters.codecs[0].id = 98;  // DTMF
   parameters.codecs[1].id = 96;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(96, gcodec.pltype);
   EXPECT_STREQ("ISAC", gcodec.plname);
   EXPECT_EQ(98, voe_.GetSendTelephoneEventPayloadType(channel_num));
 }
 
 // Test that we can set send codecs even with CN codec as the first
 // one on the list.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsCNOnTop) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kCn16000Codec);
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   parameters.codecs[0].id = 98;  // wideband CN
   parameters.codecs[1].id = 96;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(96, gcodec.pltype);
   EXPECT_STREQ("ISAC", gcodec.plname);
   EXPECT_EQ(98, voe_.GetSendCNPayloadType(channel_num, true));
 }
 
 // Test that we set VAD and DTMF types correctly as caller.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsCNandDTMFAsCaller) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   // TODO(juberti): cn 32000
   parameters.codecs.push_back(kCn16000Codec);
   parameters.codecs.push_back(kCn8000Codec);
   parameters.codecs.push_back(kTelephoneEventCodec);
   parameters.codecs.push_back(kRedCodec);
   parameters.codecs[0].id = 96;
@@ skipping 40 matching lines @@
   EXPECT_TRUE(voe_.GetVAD(channel_num));
   EXPECT_FALSE(voe_.GetRED(channel_num));
   EXPECT_EQ(13, voe_.GetSendCNPayloadType(channel_num, false));
   EXPECT_EQ(97, voe_.GetSendCNPayloadType(channel_num, true));
   EXPECT_EQ(98, voe_.GetSendTelephoneEventPayloadType(channel_num));
 }
 
 // Test that we only apply VAD if we have a CN codec that matches the
 // send codec clockrate.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsCNNoMatch) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   // Set ISAC(16K) and CN(16K). VAD should be activated.
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kCn16000Codec);
   parameters.codecs[1].id = 97;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("ISAC", gcodec.plname);
@@ skipping 15 matching lines @@
   // Set ISAC(16K) and CN(8K). VAD should not be activated.
   parameters.codecs[0] = kIsacCodec;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_STREQ("ISAC", gcodec.plname);
   EXPECT_FALSE(voe_.GetVAD(channel_num));
 }
 
 // Test that we perform case-insensitive matching of codec names.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsCaseInsensitive) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   parameters.codecs.push_back(kCn16000Codec);
   parameters.codecs.push_back(kCn8000Codec);
   parameters.codecs.push_back(kTelephoneEventCodec);
   parameters.codecs.push_back(kRedCodec);
   parameters.codecs[0].name = "iSaC";
   parameters.codecs[0].id = 96;
   parameters.codecs[2].id = 97;  // wideband CN
   parameters.codecs[4].id = 98;  // DTMF
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(96, gcodec.pltype);
   EXPECT_STREQ("ISAC", gcodec.plname);
   EXPECT_TRUE(voe_.GetVAD(channel_num));
   EXPECT_FALSE(voe_.GetRED(channel_num));
   EXPECT_EQ(13, voe_.GetSendCNPayloadType(channel_num, false));
   EXPECT_EQ(97, voe_.GetSendCNPayloadType(channel_num, true));
   EXPECT_EQ(98, voe_.GetSendTelephoneEventPayloadType(channel_num));
 }
 
 // Test that we set up RED correctly as caller.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsREDAsCaller) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kRedCodec);
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   parameters.codecs[0].id = 127;
   parameters.codecs[0].params[""] = "96/96";
   parameters.codecs[1].id = 96;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
@@ skipping 24 matching lines @@
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(96, gcodec.pltype);
   EXPECT_STREQ("ISAC", gcodec.plname);
   EXPECT_TRUE(voe_.GetRED(channel_num));
   EXPECT_EQ(127, voe_.GetSendREDPayloadType(channel_num));
 }
 
 // Test that we set up RED correctly if params are omitted.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsREDNoParams) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kRedCodec);
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   parameters.codecs[0].id = 127;
   parameters.codecs[1].id = 96;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(96, gcodec.pltype);
   EXPECT_STREQ("ISAC", gcodec.plname);
   EXPECT_TRUE(voe_.GetRED(channel_num));
   EXPECT_EQ(127, voe_.GetSendREDPayloadType(channel_num));
 }
 
 // Test that we ignore RED if the parameters aren't named the way we expect.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsBadRED1) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kRedCodec);
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   parameters.codecs[0].id = 127;
   parameters.codecs[0].params["ABC"] = "96/96";
   parameters.codecs[1].id = 96;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(96, gcodec.pltype);
   EXPECT_STREQ("ISAC", gcodec.plname);
   EXPECT_FALSE(voe_.GetRED(channel_num));
 }
 
 // Test that we ignore RED if it uses different primary/secondary encoding.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsBadRED2) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kRedCodec);
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   parameters.codecs[0].id = 127;
   parameters.codecs[0].params[""] = "96/0";
   parameters.codecs[1].id = 96;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(96, gcodec.pltype);
   EXPECT_STREQ("ISAC", gcodec.plname);
   EXPECT_FALSE(voe_.GetRED(channel_num));
 }
 
 // Test that we ignore RED if it uses more than 2 encodings.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsBadRED3) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kRedCodec);
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   parameters.codecs[0].id = 127;
   parameters.codecs[0].params[""] = "96/96/96";
   parameters.codecs[1].id = 96;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(96, gcodec.pltype);
   EXPECT_STREQ("ISAC", gcodec.plname);
   EXPECT_FALSE(voe_.GetRED(channel_num));
 }
 
 // Test that we ignore RED if it has bogus codec ids.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsBadRED4) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kRedCodec);
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   parameters.codecs[0].id = 127;
   parameters.codecs[0].params[""] = "ABC/ABC";
   parameters.codecs[1].id = 96;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
   EXPECT_EQ(0, voe_.GetSendCodec(channel_num, gcodec));
   EXPECT_EQ(96, gcodec.pltype);
   EXPECT_STREQ("ISAC", gcodec.plname);
   EXPECT_FALSE(voe_.GetRED(channel_num));
 }
 
 // Test that we ignore RED if it refers to a codec that is not present.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendCodecsBadRED5) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   cricket::AudioSendParameters parameters;
   parameters.codecs.push_back(kRedCodec);
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   parameters.codecs[0].id = 127;
   parameters.codecs[0].params[""] = "97/97";
   parameters.codecs[1].id = 96;
   EXPECT_TRUE(channel_->SetSendParameters(parameters));
   webrtc::CodecInst gcodec;
@@ skipping 12 matching lines @@
 }
 
 // Test support for absolute send time header extension.
 TEST_F(WebRtcVoiceEngineTestFake, SendAbsoluteSendTimeHeaderExtensions) {
   TestSetSendRtpHeaderExtensions(kRtpAbsoluteSenderTimeHeaderExtension);
 }
 TEST_F(WebRtcVoiceEngineTestFake, RecvAbsoluteSendTimeHeaderExtensions) {
   TestSetRecvRtpHeaderExtensions(kRtpAbsoluteSenderTimeHeaderExtension);
 }
 
-// Test that we can create a channel and start sending/playing out on it.
-TEST_F(WebRtcVoiceEngineTestFake, SendAndPlayout) {
-  EXPECT_TRUE(SetupEngine());
+// Test that we can create a channel and start sending on it.
+TEST_F(WebRtcVoiceEngineTestFake, Send) {
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
   EXPECT_TRUE(channel_->SetSend(cricket::SEND_MICROPHONE));
   EXPECT_TRUE(voe_.GetSend(channel_num));
+  EXPECT_TRUE(channel_->SetSend(cricket::SEND_NOTHING));
+  EXPECT_FALSE(voe_.GetSend(channel_num));
+}
+
+// Test that we can create a channel and start playing out on it.
+TEST_F(WebRtcVoiceEngineTestFake, Playout) {
+  EXPECT_TRUE(SetupEngineWithRecvStream());
+  int channel_num = voe_.GetLastChannel();
+  EXPECT_TRUE(channel_->SetRecvParameters(recv_parameters_));
   EXPECT_TRUE(channel_->SetPlayout(true));
   EXPECT_TRUE(voe_.GetPlayout(channel_num));
-  EXPECT_TRUE(channel_->SetSend(cricket::SEND_NOTHING));
-  EXPECT_FALSE(voe_.GetSend(channel_num));
   EXPECT_TRUE(channel_->SetPlayout(false));
   EXPECT_FALSE(voe_.GetPlayout(channel_num));
 }
 
 // Test that we can add and remove send streams.
 TEST_F(WebRtcVoiceEngineTestFake, CreateAndDeleteMultipleSendStreams) {
   SetupForMultiSendStream();
 
   static const uint32 kSsrcs4[] = {1, 2, 3, 4};
 
@@ skipping 123 matching lines @@
     EXPECT_EQ(kPcmuCodec.name, info.senders[i].codec_name);
     EXPECT_EQ(cricket::kIntStatValue, info.senders[i].bytes_sent);
     EXPECT_EQ(cricket::kIntStatValue, info.senders[i].packets_sent);
     EXPECT_EQ(cricket::kIntStatValue, info.senders[i].packets_lost);
     EXPECT_EQ(cricket::kFractionLostStatValue, info.senders[i].fraction_lost);
     EXPECT_EQ(cricket::kIntStatValue, info.senders[i].ext_seqnum);
     EXPECT_EQ(cricket::kIntStatValue, info.senders[i].rtt_ms);
     EXPECT_EQ(cricket::kIntStatValue, info.senders[i].jitter_ms);
     EXPECT_EQ(kPcmuCodec.name, info.senders[i].codec_name);
   }
+  EXPECT_EQ(0u, info.receivers.size());
 
-  EXPECT_EQ(0u, info.receivers.size());
+  // Registered stream's remote SSRC is kSsrc2. Send a packet with SSRC=1.
+  // We should drop the packet and no stats should be available.
   DeliverPacket(kPcmuFrame, sizeof(kPcmuFrame));
   EXPECT_EQ(true, channel_->GetStats(&info));
+  EXPECT_EQ(0u, info.receivers.size());
 
+  // Remove the kSsrc2 stream and deliver a new packet - a default receive
+  // stream should be created and we should see stats.
+  EXPECT_TRUE(channel_->RemoveRecvStream(kSsrc2));
+  DeliverPacket(kPcmuFrame, sizeof(kPcmuFrame));
+  EXPECT_EQ(true, channel_->GetStats(&info));
   EXPECT_EQ(1u, info.receivers.size());
+
   EXPECT_EQ(cricket::kIntStatValue, info.receivers[0].bytes_rcvd);
   EXPECT_EQ(cricket::kIntStatValue, info.receivers[0].packets_rcvd);
   EXPECT_EQ(cricket::kIntStatValue, info.receivers[0].packets_lost);
   EXPECT_EQ(cricket::kIntStatValue, info.receivers[0].ext_seqnum);
   EXPECT_EQ(kPcmuCodec.name, info.receivers[0].codec_name);
   EXPECT_EQ(static_cast<float>(cricket::kNetStats.currentExpandRate) /
       (1 << 14), info.receivers[0].expand_rate);
   EXPECT_EQ(static_cast<float>(cricket::kNetStats.currentSpeechExpandRate) /
       (1 << 14), info.receivers[0].speech_expand_rate);
   EXPECT_EQ(static_cast<float>(cricket::kNetStats.currentSecondaryDecodedRate) /
       (1 << 14), info.receivers[0].secondary_decoded_rate);
   EXPECT_EQ(
       static_cast<float>(cricket::kNetStats.currentAccelerateRate) / (1 << 14),
       info.receivers[0].accelerate_rate);
   EXPECT_EQ(
       static_cast<float>(cricket::kNetStats.currentPreemptiveRate) / (1 << 14),
       info.receivers[0].preemptive_expand_rate);
 }
 
 // Test that we can add and remove receive streams, and do proper send/playout.
 // We can receive on multiple streams while sending one stream.
 TEST_F(WebRtcVoiceEngineTestFake, PlayoutWithMultipleStreams) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num1 = voe_.GetLastChannel();
 
-  // Start playout on the default channel.
-  send_parameters_.options = options_conference_;
+  // Start playout without a receive stream.
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
   EXPECT_TRUE(channel_->SetPlayout(true));
-  EXPECT_TRUE(voe_.GetPlayout(channel_num1));
+  EXPECT_FALSE(voe_.GetPlayout(channel_num1));
 
-  // Adding another stream should disable playout on the default channel.
+  // Adding another stream should enable playout on the new stream only.
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(2)));
   int channel_num2 = voe_.GetLastChannel();
   EXPECT_TRUE(channel_->SetSend(cricket::SEND_MICROPHONE));
   EXPECT_TRUE(voe_.GetSend(channel_num1));
   EXPECT_FALSE(voe_.GetSend(channel_num2));
 
-  // Make sure only the new channel is played out.
+  // Make sure only the new stream is played out.
   EXPECT_FALSE(voe_.GetPlayout(channel_num1));
   EXPECT_TRUE(voe_.GetPlayout(channel_num2));
 
   // Adding yet another stream should have stream 2 and 3 enabled for playout.
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(3)));
   int channel_num3 = voe_.GetLastChannel();
   EXPECT_FALSE(voe_.GetPlayout(channel_num1));
   EXPECT_TRUE(voe_.GetPlayout(channel_num2));
   EXPECT_TRUE(voe_.GetPlayout(channel_num3));
   EXPECT_FALSE(voe_.GetSend(channel_num3));
 
   // Stop sending.
   EXPECT_TRUE(channel_->SetSend(cricket::SEND_NOTHING));
   EXPECT_FALSE(voe_.GetSend(channel_num1));
   EXPECT_FALSE(voe_.GetSend(channel_num2));
   EXPECT_FALSE(voe_.GetSend(channel_num3));
 
   // Stop playout.
   EXPECT_TRUE(channel_->SetPlayout(false));
   EXPECT_FALSE(voe_.GetPlayout(channel_num1));
   EXPECT_FALSE(voe_.GetPlayout(channel_num2));
   EXPECT_FALSE(voe_.GetPlayout(channel_num3));
 
-  // Restart playout and make sure the default channel still is not played out.
+  // Restart playout and make sure only recv streams are played out.
   EXPECT_TRUE(channel_->SetPlayout(true));
   EXPECT_FALSE(voe_.GetPlayout(channel_num1));
   EXPECT_TRUE(voe_.GetPlayout(channel_num2));
   EXPECT_TRUE(voe_.GetPlayout(channel_num3));
 
-  // Now remove the new streams and verify that the default channel is
-  // played out again.
+  // Now remove the recv streams and verify that the send stream doesn't play.
   EXPECT_TRUE(channel_->RemoveRecvStream(3));
   EXPECT_TRUE(channel_->RemoveRecvStream(2));
-
-  EXPECT_TRUE(voe_.GetPlayout(channel_num1));
+  EXPECT_FALSE(voe_.GetPlayout(channel_num1));
 }
 
 // Test that we can set the devices to use.
 TEST_F(WebRtcVoiceEngineTestFake, SetDevices) {
-  EXPECT_TRUE(SetupEngine());
-  int channel_num = voe_.GetLastChannel();
+  EXPECT_TRUE(SetupEngineWithSendStream());
+  int send_channel = voe_.GetLastChannel();
+  EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(2)));
+  int recv_channel = voe_.GetLastChannel();
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
 
   cricket::Device default_dev(cricket::kFakeDefaultDeviceName,
                               cricket::kFakeDefaultDeviceId);
   cricket::Device dev(cricket::kFakeDeviceName,
                       cricket::kFakeDeviceId);
 
   // Test SetDevices() while not sending or playing.
   EXPECT_TRUE(engine_.SetDevices(&default_dev, &default_dev));
 
   // Test SetDevices() while sending and playing.
   EXPECT_TRUE(channel_->SetSend(cricket::SEND_MICROPHONE));
   EXPECT_TRUE(channel_->SetPlayout(true));
-  EXPECT_TRUE(voe_.GetSend(channel_num));
-  EXPECT_TRUE(voe_.GetPlayout(channel_num));
+  EXPECT_TRUE(voe_.GetSend(send_channel));
+  EXPECT_TRUE(voe_.GetPlayout(recv_channel));
 
   EXPECT_TRUE(engine_.SetDevices(&dev, &dev));
 
-  EXPECT_TRUE(voe_.GetSend(channel_num));
-  EXPECT_TRUE(voe_.GetPlayout(channel_num));
+  EXPECT_TRUE(voe_.GetSend(send_channel));
+  EXPECT_TRUE(voe_.GetPlayout(recv_channel));
 
   // Test that failure to open newly selected devices does not prevent opening
   // ones after that.
-  voe_.set_playout_fail_channel(channel_num);
-  voe_.set_send_fail_channel(channel_num);
+  voe_.set_playout_fail_channel(recv_channel);
+  voe_.set_send_fail_channel(send_channel);
 
   EXPECT_FALSE(engine_.SetDevices(&default_dev, &default_dev));
 
-  EXPECT_FALSE(voe_.GetSend(channel_num));
-  EXPECT_FALSE(voe_.GetPlayout(channel_num));
+  EXPECT_FALSE(voe_.GetSend(send_channel));
+  EXPECT_FALSE(voe_.GetPlayout(recv_channel));
 
   voe_.set_playout_fail_channel(-1);
   voe_.set_send_fail_channel(-1);
 
   EXPECT_TRUE(engine_.SetDevices(&dev, &dev));
 
-  EXPECT_TRUE(voe_.GetSend(channel_num));
-  EXPECT_TRUE(voe_.GetPlayout(channel_num));
+  EXPECT_TRUE(voe_.GetSend(send_channel));
+  EXPECT_TRUE(voe_.GetPlayout(recv_channel));
 }
 
 // Test that we can set the devices to use even if we failed to
 // open the initial ones.
 TEST_F(WebRtcVoiceEngineTestFake, SetDevicesWithInitiallyBadDevices) {
-  EXPECT_TRUE(SetupEngine());
-  int channel_num = voe_.GetLastChannel();
+  EXPECT_TRUE(SetupEngineWithSendStream());
+  int send_channel = voe_.GetLastChannel();
+  EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(2)));
+  int recv_channel = voe_.GetLastChannel();
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
 
   cricket::Device default_dev(cricket::kFakeDefaultDeviceName,
                               cricket::kFakeDefaultDeviceId);
   cricket::Device dev(cricket::kFakeDeviceName,
                       cricket::kFakeDeviceId);
 
   // Test that failure to open devices selected before starting
   // send/play does not prevent opening newly selected ones after that.
-  voe_.set_playout_fail_channel(channel_num);
-  voe_.set_send_fail_channel(channel_num);
+  voe_.set_playout_fail_channel(recv_channel);
+  voe_.set_send_fail_channel(send_channel);
 
   EXPECT_TRUE(engine_.SetDevices(&default_dev, &default_dev));
 
   EXPECT_FALSE(channel_->SetSend(cricket::SEND_MICROPHONE));
   EXPECT_FALSE(channel_->SetPlayout(true));
-  EXPECT_FALSE(voe_.GetSend(channel_num));
-  EXPECT_FALSE(voe_.GetPlayout(channel_num));
+  EXPECT_FALSE(voe_.GetSend(send_channel));
+  EXPECT_FALSE(voe_.GetPlayout(recv_channel));
 
   voe_.set_playout_fail_channel(-1);
   voe_.set_send_fail_channel(-1);
 
   EXPECT_TRUE(engine_.SetDevices(&dev, &dev));
 
-  EXPECT_TRUE(voe_.GetSend(channel_num));
-  EXPECT_TRUE(voe_.GetPlayout(channel_num));
-}
-
-// Test that we can create a channel configured for multi-point conferences,
-// and start sending/playing out on it.
-TEST_F(WebRtcVoiceEngineTestFake, ConferenceSendAndPlayout) {
-  EXPECT_TRUE(SetupEngine());
-  int channel_num = voe_.GetLastChannel();
-  send_parameters_.options = options_conference_;
-  EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
-  EXPECT_TRUE(channel_->SetSend(cricket::SEND_MICROPHONE));
-  EXPECT_TRUE(voe_.GetSend(channel_num));
+  EXPECT_TRUE(voe_.GetSend(send_channel));
+  EXPECT_TRUE(voe_.GetPlayout(recv_channel));
 }
 
 // Test that we can create a channel configured for Codian bridges,
-// and start sending/playing out on it.
-TEST_F(WebRtcVoiceEngineTestFake, CodianSendAndPlayout) {
-  EXPECT_TRUE(SetupEngine());
+// and start sending on it.
+TEST_F(WebRtcVoiceEngineTestFake, CodianSend) {
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   webrtc::AgcConfig agc_config;
   EXPECT_EQ(0, voe_.GetAgcConfig(agc_config));
   EXPECT_EQ(0, agc_config.targetLeveldBOv);
   send_parameters_.options = options_adjust_agc_;
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
   EXPECT_TRUE(channel_->SetSend(cricket::SEND_MICROPHONE));
   EXPECT_TRUE(voe_.GetSend(channel_num));
   EXPECT_EQ(0, voe_.GetAgcConfig(agc_config));
   EXPECT_EQ(agc_config.targetLeveldBOv, 10);  // level was attenuated
-  EXPECT_TRUE(channel_->SetPlayout(true));
-  EXPECT_TRUE(voe_.GetPlayout(channel_num));
   EXPECT_TRUE(channel_->SetSend(cricket::SEND_NOTHING));
   EXPECT_FALSE(voe_.GetSend(channel_num));
   EXPECT_EQ(0, voe_.GetAgcConfig(agc_config));
   EXPECT_EQ(0, agc_config.targetLeveldBOv);  // level was restored
-  EXPECT_TRUE(channel_->SetPlayout(false));
-  EXPECT_FALSE(voe_.GetPlayout(channel_num));
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, TxAgcConfigViaOptions) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   webrtc::AgcConfig agc_config;
   EXPECT_EQ(0, voe_.GetAgcConfig(agc_config));
   EXPECT_EQ(0, agc_config.targetLeveldBOv);
 
   cricket::AudioOptions options;
   options.tx_agc_target_dbov.Set(3);
   options.tx_agc_digital_compression_gain.Set(9);
   options.tx_agc_limiter.Set(true);
   options.auto_gain_control.Set(true);
   EXPECT_TRUE(engine_.SetOptions(options));
 
   EXPECT_EQ(0, voe_.GetAgcConfig(agc_config));
   EXPECT_EQ(3, agc_config.targetLeveldBOv);
   EXPECT_EQ(9, agc_config.digitalCompressionGaindB);
   EXPECT_TRUE(agc_config.limiterEnable);
 
   // Check interaction with adjust_agc_delta. Both should be respected, for
   // backwards compatibility.
   options.adjust_agc_delta.Set(-10);
   EXPECT_TRUE(engine_.SetOptions(options));
 
   EXPECT_EQ(0, voe_.GetAgcConfig(agc_config));
   EXPECT_EQ(13, agc_config.targetLeveldBOv);
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, RxAgcConfigViaOptions) {
-  EXPECT_TRUE(SetupEngine());
-  int channel_num = voe_.GetLastChannel();
+  EXPECT_TRUE(SetupEngineWithSendStream());
   send_parameters_.options.rx_agc_target_dbov.Set(6);
   send_parameters_.options.rx_agc_digital_compression_gain.Set(0);
   send_parameters_.options.rx_agc_limiter.Set(true);
   send_parameters_.options.rx_auto_gain_control.Set(true);
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
+  EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(2)));
+  int channel_num = voe_.GetLastChannel();
 
   webrtc::AgcConfig agc_config;
   EXPECT_EQ(0, engine_.voe()->processing()->GetRxAgcConfig(
       channel_num, agc_config));
   EXPECT_EQ(6, agc_config.targetLeveldBOv);
   EXPECT_EQ(0, agc_config.digitalCompressionGaindB);
   EXPECT_TRUE(agc_config.limiterEnable);
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, SampleRatesViaOptions) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   cricket::AudioOptions options;
   options.recording_sample_rate.Set(48000u);
   options.playout_sample_rate.Set(44100u);
   EXPECT_TRUE(engine_.SetOptions(options));
 
   unsigned int recording_sample_rate, playout_sample_rate;
   EXPECT_EQ(0, voe_.RecordingSampleRate(&recording_sample_rate));
   EXPECT_EQ(0, voe_.PlayoutSampleRate(&playout_sample_rate));
   EXPECT_EQ(48000u, recording_sample_rate);
   EXPECT_EQ(44100u, playout_sample_rate);
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, TraceFilterViaTraceOptions) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   engine_.SetLogging(rtc::LS_INFO, "");
   EXPECT_EQ(
       // Info:
       webrtc::kTraceStateInfo | webrtc::kTraceInfo |
       // Warning:
       webrtc::kTraceTerseInfo | webrtc::kTraceWarning |
       // Error:
       webrtc::kTraceError | webrtc::kTraceCritical,
       static_cast<int>(trace_wrapper_->filter_));
   // Now set it explicitly
   std::string filter =
       "tracefilter " + rtc::ToString(webrtc::kTraceDefault);
   engine_.SetLogging(rtc::LS_VERBOSE, filter.c_str());
   EXPECT_EQ(static_cast<unsigned int>(webrtc::kTraceDefault),
             trace_wrapper_->filter_);
 }
 
 // Test that we can set the outgoing SSRC properly.
 // SSRC is set in SetupEngine by calling AddSendStream.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendSsrc) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num = voe_.GetLastChannel();
   unsigned int send_ssrc;
   EXPECT_EQ(0, voe_.GetLocalSSRC(channel_num, send_ssrc));
   EXPECT_NE(0U, send_ssrc);
   EXPECT_EQ(0, voe_.GetLocalSSRC(channel_num, send_ssrc));
   EXPECT_EQ(kSsrc1, send_ssrc);
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, GetStats) {
   // Setup. We need send codec to be set to get all stats.
-  EXPECT_TRUE(SetupEngine());
-  // SetupEngine adds a send stream with kSsrc1, so the receive stream has to
-  // use a different SSRC.
+  EXPECT_TRUE(SetupEngineWithSendStream());
+  // SetupEngineWithSendStream adds a send stream with kSsrc1, so the receive
+  // stream has to use a different SSRC.
   EXPECT_TRUE(channel_->AddRecvStream(
       cricket::StreamParams::CreateLegacy(kSsrc2)));
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
   EXPECT_TRUE(channel_->SetRecvParameters(recv_parameters_));
 
   cricket::VoiceMediaInfo info;
   EXPECT_EQ(true, channel_->GetStats(&info));
   EXPECT_EQ(1u, info.senders.size());
   EXPECT_EQ(kSsrc1, info.senders[0].ssrc());
   EXPECT_EQ(kPcmuCodec.name, info.senders[0].codec_name);
   EXPECT_EQ(cricket::kIntStatValue, info.senders[0].bytes_sent);
   EXPECT_EQ(cricket::kIntStatValue, info.senders[0].packets_sent);
   EXPECT_EQ(cricket::kIntStatValue, info.senders[0].packets_lost);
   EXPECT_EQ(cricket::kFractionLostStatValue, info.senders[0].fraction_lost);
   EXPECT_EQ(cricket::kIntStatValue, info.senders[0].ext_seqnum);
   EXPECT_EQ(cricket::kIntStatValue, info.senders[0].rtt_ms);
   EXPECT_EQ(cricket::kIntStatValue, info.senders[0].jitter_ms);
   EXPECT_EQ(kPcmuCodec.name, info.senders[0].codec_name);
   // TODO(sriniv): Add testing for more fields. These are not populated
   // in FakeWebrtcVoiceEngine yet.
   // EXPECT_EQ(cricket::kIntStatValue, info.senders[0].audio_level);
   // EXPECT_EQ(cricket::kIntStatValue, info.senders[0].echo_delay_median_ms);
   // EXPECT_EQ(cricket::kIntStatValue, info.senders[0].echo_delay_std_ms);
   // EXPECT_EQ(cricket::kIntStatValue, info.senders[0].echo_return_loss);
   // EXPECT_EQ(cricket::kIntStatValue,
   //           info.senders[0].echo_return_loss_enhancement);
+  EXPECT_EQ(0u, info.receivers.size());
 
+  // Registered stream's remote SSRC is kSsrc2. Send a packet with SSRC=1.
+  // We should drop the packet and no stats should be available.
+  DeliverPacket(kPcmuFrame, sizeof(kPcmuFrame));
+  EXPECT_EQ(true, channel_->GetStats(&info));
   EXPECT_EQ(0u, info.receivers.size());
+
+  // Remove the kSsrc2 stream and deliver a new packet - a default receive
+  // stream should be created and we should see stats.
+  EXPECT_TRUE(channel_->RemoveRecvStream(kSsrc2));
   DeliverPacket(kPcmuFrame, sizeof(kPcmuFrame));
   EXPECT_EQ(true, channel_->GetStats(&info));
   EXPECT_EQ(1u, info.receivers.size());
 
   EXPECT_EQ(cricket::kIntStatValue, info.receivers[0].bytes_rcvd);
   EXPECT_EQ(cricket::kIntStatValue, info.receivers[0].packets_rcvd);
   EXPECT_EQ(cricket::kIntStatValue, info.receivers[0].packets_lost);
   EXPECT_EQ(cricket::kIntStatValue, info.receivers[0].ext_seqnum);
   EXPECT_EQ(kPcmuCodec.name, info.receivers[0].codec_name);
   EXPECT_EQ(static_cast<float>(cricket::kNetStats.currentExpandRate) /
       (1 << 14), info.receivers[0].expand_rate);
   EXPECT_EQ(static_cast<float>(cricket::kNetStats.currentSpeechExpandRate) /
       (1 << 14), info.receivers[0].speech_expand_rate);
   EXPECT_EQ(static_cast<float>(cricket::kNetStats.currentSecondaryDecodedRate) /
       (1 << 14), info.receivers[0].secondary_decoded_rate);
   // TODO(sriniv): Add testing for more receiver fields.
 }
 
 // Test that we can set the outgoing SSRC properly with multiple streams.
 // SSRC is set in SetupEngine by calling AddSendStream.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendSsrcWithMultipleStreams) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   int channel_num1 = voe_.GetLastChannel();
   unsigned int send_ssrc;
   EXPECT_EQ(0, voe_.GetLocalSSRC(channel_num1, send_ssrc));
   EXPECT_EQ(kSsrc1, send_ssrc);
 
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(2)));
   int channel_num2 = voe_.GetLastChannel();
   EXPECT_EQ(0, voe_.GetLocalSSRC(channel_num2, send_ssrc));
   EXPECT_EQ(kSsrc1, send_ssrc);
 }
@@ skipping 14 matching lines @@
   EXPECT_EQ(0, voe_.GetLocalSSRC(send_channel_num, ssrc));
   EXPECT_EQ(1234U, ssrc);
   ssrc = 0;
   EXPECT_EQ(0, voe_.GetLocalSSRC(receive_channel_num, ssrc));
   EXPECT_EQ(1234U, ssrc);
 }
 
 // Test that we can properly receive packets.
 TEST_F(WebRtcVoiceEngineTestFake, Recv) {
   EXPECT_TRUE(SetupEngine());
+  DeliverPacket(kPcmuFrame, sizeof(kPcmuFrame));
   int channel_num = voe_.GetLastChannel();
-  DeliverPacket(kPcmuFrame, sizeof(kPcmuFrame));
   EXPECT_TRUE(voe_.CheckPacket(channel_num, kPcmuFrame,
                                sizeof(kPcmuFrame)));
 }
 
 // Test that we can properly receive packets on multiple streams.
 TEST_F(WebRtcVoiceEngineTestFake, RecvWithMultipleStreams) {
-  EXPECT_TRUE(SetupEngine());
-  send_parameters_.options = options_conference_;
+  EXPECT_TRUE(SetupEngineWithSendStream());
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(1)));
   int channel_num1 = voe_.GetLastChannel();
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(2)));
   int channel_num2 = voe_.GetLastChannel();
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(3)));
   int channel_num3 = voe_.GetLastChannel();
   // Create packets with the right SSRCs.
   char packets[4][sizeof(kPcmuFrame)];
   for (size_t i = 0; i < ARRAY_SIZE(packets); ++i) {
@@ skipping 22 matching lines @@
   EXPECT_TRUE(voe_.CheckNoPacket(channel_num2));
   EXPECT_TRUE(voe_.CheckPacket(channel_num3, packets[3],
                                sizeof(packets[3])));
   EXPECT_TRUE(channel_->RemoveRecvStream(3));
   EXPECT_TRUE(channel_->RemoveRecvStream(2));
   EXPECT_TRUE(channel_->RemoveRecvStream(1));
 }
 
 // Test that we properly handle failures to add a stream.
 TEST_F(WebRtcVoiceEngineTestFake, AddStreamFail) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   voe_.set_fail_create_channel(true);
-  send_parameters_.options = options_conference_;
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
   EXPECT_FALSE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(2)));
-
-  // In 1:1 call, we should not try to create a new channel.
-  send_parameters_.options.conference_mode.Set(false);
-  EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
-  EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(2)));
 }
 
-// Test that AddRecvStream doesn't create new channel for 1:1 call.
-TEST_F(WebRtcVoiceEngineTestFake, AddRecvStream1On1) {
-  EXPECT_TRUE(SetupEngine());
+// Test that AddRecvStream creates new stream.
+TEST_F(WebRtcVoiceEngineTestFake, AddRecvStream) {
+  EXPECT_TRUE(SetupEngineWithRecvStream());
   int channel_num = voe_.GetLastChannel();
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(1)));
-  EXPECT_EQ(channel_num, voe_.GetLastChannel());
+  EXPECT_NE(channel_num, voe_.GetLastChannel());
 }
 
 // Test that after adding a recv stream, we do not decode more codecs than
 // those previously passed into SetRecvCodecs.
 TEST_F(WebRtcVoiceEngineTestFake, AddRecvStreamUnsupportedCodec) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   cricket::AudioRecvParameters parameters;
   parameters.codecs.push_back(kIsacCodec);
   parameters.codecs.push_back(kPcmuCodec);
   EXPECT_TRUE(channel_->SetRecvParameters(parameters));
   EXPECT_TRUE(channel_->AddRecvStream(
       cricket::StreamParams::CreateLegacy(kSsrc1)));
   int channel_num2 = voe_.GetLastChannel();
   webrtc::CodecInst gcodec;
   rtc::strcpyn(gcodec.plname, ARRAY_SIZE(gcodec.plname), "opus");
   gcodec.plfreq = 48000;
   gcodec.channels = 2;
   EXPECT_EQ(-1, voe_.GetRecPayloadType(channel_num2, gcodec));
 }
 
 // Test that we properly clean up any streams that were added, even if
 // not explicitly removed.
 TEST_F(WebRtcVoiceEngineTestFake, StreamCleanup) {
-  EXPECT_TRUE(SetupEngine());
-  send_parameters_.options = options_conference_;
+  EXPECT_TRUE(SetupEngineWithSendStream());
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(1)));
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(2)));
   EXPECT_EQ(3, voe_.GetNumChannels());  // default channel + 2 added
   delete channel_;
   channel_ = NULL;
   EXPECT_EQ(0, voe_.GetNumChannels());
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, TestAddRecvStreamFailWithZeroSsrc) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   EXPECT_FALSE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(0)));
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, TestNoLeakingWhenAddRecvStreamFail) {
   EXPECT_TRUE(SetupEngine());
-  // Stream 1 reuses default channel.
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(1)));
-  // Manually delete default channel to simulate a failure.
-  int default_channel = voe_.GetLastChannel();
-  EXPECT_EQ(0, voe_.DeleteChannel(default_channel));
-  // Add recv stream 2 should fail because default channel is gone.
-  EXPECT_FALSE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(2)));
+  // Manually delete channel to simulate a failure.
+  int channel = voe_.GetLastChannel();
+  EXPECT_EQ(0, voe_.DeleteChannel(channel));
+  // Add recv stream 2 should work.
+  EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(2)));
   int new_channel = voe_.GetLastChannel();
-  EXPECT_NE(default_channel, new_channel);
-  // The last created channel should have already been deleted.
-  EXPECT_EQ(-1, voe_.DeleteChannel(new_channel));
+  EXPECT_NE(channel, new_channel);
+  // The last created channel is deleted too.
+  EXPECT_EQ(0, voe_.DeleteChannel(new_channel));
 }
 
 // Test the InsertDtmf on default send stream as caller.
 TEST_F(WebRtcVoiceEngineTestFake, InsertDtmfOnDefaultSendStreamAsCaller) {
   TestInsertDtmf(0, true);
 }
 
 // Test the InsertDtmf on default send stream as callee
 TEST_F(WebRtcVoiceEngineTestFake, InsertDtmfOnDefaultSendStreamAsCallee) {
   TestInsertDtmf(0, false);
 }
 
 // Test the InsertDtmf on specified send stream as caller.
 TEST_F(WebRtcVoiceEngineTestFake, InsertDtmfOnSendStreamAsCaller) {
   TestInsertDtmf(kSsrc1, true);
 }
 
 // Test the InsertDtmf on specified send stream as callee.
 TEST_F(WebRtcVoiceEngineTestFake, InsertDtmfOnSendStreamAsCallee) {
   TestInsertDtmf(kSsrc1, false);
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, TestSetPlayoutError) {
-  EXPECT_TRUE(SetupEngine());
-  send_parameters_.options = options_conference_;
+  EXPECT_TRUE(SetupEngineWithSendStream());
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
   EXPECT_TRUE(channel_->SetSend(cricket::SEND_MICROPHONE));
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(2)));
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(3)));
   EXPECT_TRUE(channel_->SetPlayout(true));
   voe_.set_playout_fail_channel(voe_.GetLastChannel() - 1);
   EXPECT_TRUE(channel_->SetPlayout(false));
   EXPECT_FALSE(channel_->SetPlayout(true));
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, SetAudioOptions) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
 
   bool ec_enabled;
   webrtc::EcModes ec_mode;
   bool ec_metrics_enabled;
   webrtc::AecmModes aecm_mode;
   bool cng_enabled;
   bool agc_enabled;
   webrtc::AgcModes agc_mode;
   webrtc::AgcConfig agc_config;
   bool ns_enabled;
@@ skipping 129 matching lines @@
   ASSERT_TRUE(engine_.SetOptions(options));
   voe_.GetNsStatus(ns_enabled, ns_mode);
   highpass_filter_enabled = voe_.IsHighPassFilterEnabled();
   stereo_swapping_enabled = voe_.IsStereoChannelSwappingEnabled();
   voe_.GetTypingDetectionStatus(typing_detection_enabled);
   EXPECT_FALSE(ns_enabled);
   EXPECT_FALSE(highpass_filter_enabled);
   EXPECT_FALSE(typing_detection_enabled);
   EXPECT_TRUE(stereo_swapping_enabled);
 
-  // Turn on "conference mode" to ensure it has no impact.
-  options.conference_mode.Set(true);
+  // Set options again to ensure it has no impact.
   ASSERT_TRUE(engine_.SetOptions(options));
   voe_.GetEcStatus(ec_enabled, ec_mode);
   voe_.GetNsStatus(ns_enabled, ns_mode);
   EXPECT_TRUE(ec_enabled);
   EXPECT_EQ(webrtc::kEcConference, ec_mode);
   EXPECT_FALSE(ns_enabled);
   EXPECT_EQ(webrtc::kNsHighSuppression, ns_mode);
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, DefaultOptions) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
 
   bool ec_enabled;
   webrtc::EcModes ec_mode;
   bool ec_metrics_enabled;
   bool agc_enabled;
   webrtc::AgcModes agc_mode;
   bool ns_enabled;
   webrtc::NsModes ns_mode;
   bool highpass_filter_enabled;
   bool stereo_swapping_enabled;
@@ skipping 24 matching lines @@
 
   webrtc::AgcConfig config = {0};
   EXPECT_EQ(0, voe_.GetAgcConfig(config));
   EXPECT_EQ(set_config.targetLeveldBOv, config.targetLeveldBOv);
   EXPECT_EQ(set_config.digitalCompressionGaindB,
             config.digitalCompressionGaindB);
   EXPECT_EQ(set_config.limiterEnable, config.limiterEnable);
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, SetOptionOverridesViaChannels) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   rtc::scoped_ptr<cricket::WebRtcVoiceMediaChannel> channel1(
       static_cast<cricket::WebRtcVoiceMediaChannel*>(
           engine_.CreateChannel(&call_, cricket::AudioOptions())));
   rtc::scoped_ptr<cricket::WebRtcVoiceMediaChannel> channel2(
       static_cast<cricket::WebRtcVoiceMediaChannel*>(
           engine_.CreateChannel(&call_, cricket::AudioOptions())));
 
   // Have to add a stream to make SetSend work.
   cricket::StreamParams stream1;
   stream1.ssrcs.push_back(1);
@@ skipping 92 matching lines @@
   voe_.GetEcStatus(ec_enabled, ec_mode);
   voe_.GetAgcStatus(agc_enabled, agc_mode);
   voe_.GetNsStatus(ns_enabled, ns_mode);
   EXPECT_TRUE(ec_enabled);
   EXPECT_FALSE(agc_enabled);
   EXPECT_FALSE(ns_enabled);
 }
 
 // This test verifies DSCP settings are properly applied on voice media channel.
 TEST_F(WebRtcVoiceEngineTestFake, TestSetDscpOptions) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   rtc::scoped_ptr<cricket::VoiceMediaChannel> channel(
       engine_.CreateChannel(&call_, cricket::AudioOptions()));
   rtc::scoped_ptr<cricket::FakeNetworkInterface> network_interface(
       new cricket::FakeNetworkInterface);
   channel->SetInterface(network_interface.get());
   cricket::AudioSendParameters parameters = send_parameters_;
   parameters.options.dscp.Set(true);
   EXPECT_TRUE(channel->SetSendParameters(parameters));
   EXPECT_EQ(rtc::DSCP_EF, network_interface->dscp());
   // Verify previous value is not modified if dscp option is not set.
   EXPECT_TRUE(channel->SetSendParameters(send_parameters_));
   EXPECT_EQ(rtc::DSCP_EF, network_interface->dscp());
   parameters.options.dscp.Set(false);
   EXPECT_TRUE(channel->SetSendParameters(parameters));
   EXPECT_EQ(rtc::DSCP_DEFAULT, network_interface->dscp());
 }
 
-// Test that GetReceiveChannelId returns the default channel for the first
-// recv stream in 1-1 calls.
-TEST_F(WebRtcVoiceEngineTestFake, TestGetReceiveChannelIdIn1To1Calls) {
+TEST_F(WebRtcVoiceEngineTestFake, TestGetReceiveChannelId) {
   EXPECT_TRUE(SetupEngine());
   cricket::WebRtcVoiceMediaChannel* media_channel =
         static_cast<cricket::WebRtcVoiceMediaChannel*>(channel_);
-  // Test that GetChannelNum returns the default channel if the SSRC is unknown.
-  EXPECT_EQ(media_channel->default_send_channel_id(),
-            media_channel->GetReceiveChannelId(0));
-  cricket::StreamParams stream;
-  stream.ssrcs.push_back(kSsrc2);
-  EXPECT_TRUE(channel_->AddRecvStream(stream));
-  EXPECT_EQ(media_channel->default_send_channel_id(),
-            media_channel->GetReceiveChannelId(kSsrc2));
+  EXPECT_EQ(-1, media_channel->GetReceiveChannelId(0));
+  EXPECT_TRUE(channel_->AddRecvStream(
+      cricket::StreamParams::CreateLegacy(kSsrc1)));
+  int channel_id = voe_.GetLastChannel();
+  EXPECT_EQ(channel_id, media_channel->GetReceiveChannelId(kSsrc1));
+  EXPECT_EQ(-1, media_channel->GetReceiveChannelId(kSsrc2));
+  EXPECT_TRUE(channel_->AddRecvStream(
+      cricket::StreamParams::CreateLegacy(kSsrc2)));
+  int channel_id2 = voe_.GetLastChannel();
+  EXPECT_EQ(channel_id2, media_channel->GetReceiveChannelId(kSsrc2));
 }
 
-// Test that GetReceiveChannelId doesn't return the default channel for the
-// first recv stream in conference calls.
-TEST_F(WebRtcVoiceEngineTestFake, TestGetChannelNumInConferenceCalls) {
+TEST_F(WebRtcVoiceEngineTestFake, TestGetSendChannelId) {
   EXPECT_TRUE(SetupEngine());
-  send_parameters_.options = options_conference_;
-  EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
-  cricket::StreamParams stream;
-  stream.ssrcs.push_back(kSsrc2);
-  EXPECT_TRUE(channel_->AddRecvStream(stream));
   cricket::WebRtcVoiceMediaChannel* media_channel =
-      static_cast<cricket::WebRtcVoiceMediaChannel*>(channel_);
-  EXPECT_LT(media_channel->default_send_channel_id(),
-            media_channel->GetReceiveChannelId(kSsrc2));
+        static_cast<cricket::WebRtcVoiceMediaChannel*>(channel_);
+  EXPECT_EQ(-1, media_channel->GetSendChannelId(0));
+  EXPECT_TRUE(channel_->AddSendStream(
+      cricket::StreamParams::CreateLegacy(kSsrc1)));
+  int channel_id = voe_.GetLastChannel();
+  EXPECT_EQ(channel_id, media_channel->GetSendChannelId(kSsrc1));
+  EXPECT_EQ(-1, media_channel->GetSendChannelId(kSsrc2));
+  EXPECT_TRUE(channel_->AddSendStream(
+      cricket::StreamParams::CreateLegacy(kSsrc2)));
+  int channel_id2 = voe_.GetLastChannel();
+  EXPECT_EQ(channel_id2, media_channel->GetSendChannelId(kSsrc2));
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, SetOutputScaling) {
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithRecvStream());
   float scale, left, right;
-  EXPECT_TRUE(channel_->SetOutputScaling(0, 1, 2));
+  EXPECT_TRUE(channel_->SetOutputScaling(kSsrc1, 1, 2));
   int channel_id = voe_.GetLastChannel();
   EXPECT_EQ(0, voe_.GetChannelOutputVolumeScaling(channel_id, scale));
   EXPECT_EQ(0, voe_.GetOutputVolumePan(channel_id, left, right));
   EXPECT_DOUBLE_EQ(1, left * scale);
   EXPECT_DOUBLE_EQ(2, right * scale);
 
   EXPECT_FALSE(channel_->SetOutputScaling(kSsrc2, 1, 2));
   cricket::StreamParams stream;
   stream.ssrcs.push_back(kSsrc2);
   EXPECT_TRUE(channel_->AddRecvStream(stream));
 
   EXPECT_TRUE(channel_->SetOutputScaling(kSsrc2, 2, 1));
   channel_id = voe_.GetLastChannel();
   EXPECT_EQ(0, voe_.GetChannelOutputVolumeScaling(channel_id, scale));
   EXPECT_EQ(0, voe_.GetOutputVolumePan(channel_id, left, right));
   EXPECT_DOUBLE_EQ(2, left * scale);
   EXPECT_DOUBLE_EQ(1, right * scale);
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, SetsSyncGroupFromSyncLabel) {
   const uint32 kAudioSsrc = 123;
   const std::string kSyncLabel = "AvSyncLabel";
 
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   cricket::StreamParams sp = cricket::StreamParams::CreateLegacy(kAudioSsrc);
   sp.sync_label = kSyncLabel;
   // Creating two channels to make sure that sync label is set properly for both
   // the default voice channel and following ones.
   EXPECT_TRUE(channel_->AddRecvStream(sp));
   sp.ssrcs[0] += 1;
   EXPECT_TRUE(channel_->AddRecvStream(sp));
 
   ASSERT_EQ(2, call_.GetAudioReceiveStreams().size());
   EXPECT_EQ(kSyncLabel,
             call_.GetAudioReceiveStream(kAudioSsrc)->GetConfig().sync_group)
       << "SyncGroup should be set based on sync_label";
   EXPECT_EQ(kSyncLabel,
             call_.GetAudioReceiveStream(kAudioSsrc + 1)->GetConfig().sync_group)
       << "SyncGroup should be set based on sync_label";
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, CanChangeCombinedBweOption) {
   // Test that changing the combined_audio_video_bwe option results in the
   // expected state changes on an associated Call.
   std::vector<uint32> ssrcs;
   ssrcs.push_back(223);
   ssrcs.push_back(224);
 
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   cricket::WebRtcVoiceMediaChannel* media_channel =
       static_cast<cricket::WebRtcVoiceMediaChannel*>(channel_);
   for (uint32 ssrc : ssrcs) {
     EXPECT_TRUE(media_channel->AddRecvStream(
         cricket::StreamParams::CreateLegacy(ssrc)));
   }
   EXPECT_EQ(2, call_.GetAudioReceiveStreams().size());
 
   // Combined BWE should be disabled.
   for (uint32 ssrc : ssrcs) {
@@ skipping 19 matching lines @@
     EXPECT_NE(nullptr, s);
     EXPECT_EQ(false, s->GetConfig().combined_audio_video_bwe);
   }
 
   EXPECT_EQ(2, call_.GetAudioReceiveStreams().size());
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, ConfigureCombinedBweForNewRecvStreams) {
   // Test that adding receive streams after enabling combined bandwidth
   // estimation will correctly configure each channel.
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   cricket::WebRtcVoiceMediaChannel* media_channel =
       static_cast<cricket::WebRtcVoiceMediaChannel*>(channel_);
   send_parameters_.options.combined_audio_video_bwe.Set(true);
   EXPECT_TRUE(media_channel->SetSendParameters(send_parameters_));
 
   static const uint32 kSsrcs[] = {1, 2, 3, 4};
   for (unsigned int i = 0; i < ARRAY_SIZE(kSsrcs); ++i) {
     EXPECT_TRUE(media_channel->AddRecvStream(
         cricket::StreamParams::CreateLegacy(kSsrcs[i])));
     EXPECT_NE(nullptr, call_.GetAudioReceiveStream(kSsrcs[i]));
   }
   EXPECT_EQ(ARRAY_SIZE(kSsrcs), call_.GetAudioReceiveStreams().size());
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, ConfiguresAudioReceiveStreamRtpExtensions) {
   // Test that setting the header extensions results in the expected state
   // changes on an associated Call.
   std::vector<uint32> ssrcs;
   ssrcs.push_back(223);
   ssrcs.push_back(224);
 
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   cricket::WebRtcVoiceMediaChannel* media_channel =
       static_cast<cricket::WebRtcVoiceMediaChannel*>(channel_);
   send_parameters_.options.combined_audio_video_bwe.Set(true);
   EXPECT_TRUE(media_channel->SetSendParameters(send_parameters_));
   for (uint32 ssrc : ssrcs) {
     EXPECT_TRUE(media_channel->AddRecvStream(
         cricket::StreamParams::CreateLegacy(ssrc)));
   }
 
   // Combined BWE should be set up, but with no configured extensions.
@@ skipping 38 matching lines @@
   const uint32 kAudioSsrc = 1;
   rtc::Buffer kPcmuPacket(kPcmuFrame, sizeof(kPcmuFrame));
   static const unsigned char kRtcp[] = {
     0x80, 0xc9, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02,
     0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
   };
   rtc::Buffer kRtcpPacket(kRtcp, sizeof(kRtcp));
 
-  EXPECT_TRUE(SetupEngine());
+  EXPECT_TRUE(SetupEngineWithSendStream());
   cricket::WebRtcVoiceMediaChannel* media_channel =
       static_cast<cricket::WebRtcVoiceMediaChannel*>(channel_);
   send_parameters_.options.combined_audio_video_bwe.Set(true);
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
   EXPECT_TRUE(media_channel->AddRecvStream(
       cricket::StreamParams::CreateLegacy(kAudioSsrc)));
 
   EXPECT_EQ(1, call_.GetAudioReceiveStreams().size());
   const cricket::FakeAudioReceiveStream* s =
       call_.GetAudioReceiveStream(kAudioSsrc);
   EXPECT_EQ(0, s->received_packets());
   channel_->OnPacketReceived(&kPcmuPacket, rtc::PacketTime());
   EXPECT_EQ(1, s->received_packets());
   channel_->OnRtcpReceived(&kRtcpPacket, rtc::PacketTime());
   EXPECT_EQ(2, s->received_packets());
 }
 
-// Associate channel should not set on 1:1 call, since the receive channel also
-// sends RTCP SR.
-TEST_F(WebRtcVoiceEngineTestFake, AssociateChannelUnset1On1) {
-  EXPECT_TRUE(SetupEngine());
-  EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(1)));
-  int recv_ch = voe_.GetLastChannel();
-  EXPECT_EQ(voe_.GetAssociateSendChannel(recv_ch), -1);
-}
-
-// This test is an extension of AssociateChannelUnset1On1. We create two receive
-// channels. The second should be associated with the default channel, since it
-// does not send RTCP SR.
-TEST_F(WebRtcVoiceEngineTestFake, AssociateDefaultChannelOnSecondRecvChannel) {
-  EXPECT_TRUE(SetupEngine());
-  int default_channel = voe_.GetLastChannel();
-  EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(1)));
-  int recv_ch_1 = voe_.GetLastChannel();
-  EXPECT_EQ(recv_ch_1, default_channel);
-  EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(2)));
-  int recv_ch_2 = voe_.GetLastChannel();
-  EXPECT_EQ(voe_.GetAssociateSendChannel(recv_ch_1), -1);
-  EXPECT_EQ(voe_.GetAssociateSendChannel(recv_ch_2), default_channel);
-  // Add send stream, the association remains.
-  EXPECT_TRUE(channel_->AddSendStream(cricket::StreamParams::CreateLegacy(3)));
-  EXPECT_EQ(voe_.GetAssociateSendChannel(recv_ch_1), -1);
-  EXPECT_EQ(voe_.GetAssociateSendChannel(recv_ch_2), default_channel);
-}
-
-// In conference mode, all receive channels should be associated with the
-// default channel, since they do not send RTCP SR.
+// All receive channels should be associated with the default send channel,
+// since they do not send RTCP SR.
 TEST_F(WebRtcVoiceEngineTestFake, AssociateDefaultChannelOnConference) {
-  EXPECT_TRUE(SetupEngine());
-  send_parameters_.options = options_conference_;
+  EXPECT_TRUE(SetupEngineWithSendStream());
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
   int default_channel = voe_.GetLastChannel();
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(1)));
   int recv_ch = voe_.GetLastChannel();
   EXPECT_NE(recv_ch, default_channel);
   EXPECT_EQ(voe_.GetAssociateSendChannel(recv_ch), default_channel);
   EXPECT_TRUE(channel_->AddSendStream(cricket::StreamParams::CreateLegacy(2)));
   EXPECT_EQ(voe_.GetAssociateSendChannel(recv_ch), default_channel);
+  EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(3)));
+  recv_ch = voe_.GetLastChannel();
+  EXPECT_NE(recv_ch, default_channel);
+  EXPECT_EQ(voe_.GetAssociateSendChannel(recv_ch), default_channel);
 }
 
 TEST_F(WebRtcVoiceEngineTestFake, AssociateChannelResetUponDeleteChannnel) {
-  EXPECT_TRUE(SetupEngine());
-  send_parameters_.options = options_conference_;
+  EXPECT_TRUE(SetupEngineWithSendStream());
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
 
   EXPECT_TRUE(channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(1)));
   int recv_ch = voe_.GetLastChannel();
 
   EXPECT_TRUE(channel_->AddSendStream(cricket::StreamParams::CreateLegacy(2)));
   int send_ch = voe_.GetLastChannel();
 
   // Manually associate |recv_ch| to |send_ch|. This test is to verify a
   // deleting logic, i.e., deleting |send_ch| will reset the associate send
@@ skipping 132 matching lines @@
       break;
     channels[num_channels++] = channel;
   }
 
   int expected = ARRAY_SIZE(channels);
   EXPECT_EQ(expected, num_channels);
 
   while (num_channels > 0) {
     delete channels[--num_channels];
   }
-
   engine.Terminate();
 }
 
 // Test that we set our preferred codecs properly.
 TEST(WebRtcVoiceEngineTest, SetRecvCodecs) {
   cricket::WebRtcVoiceEngine engine;
   EXPECT_TRUE(engine.Init(rtc::Thread::Current()));
   rtc::scoped_ptr<webrtc::Call> call(
       webrtc::Call::Create(webrtc::Call::Config()));
   cricket::WebRtcVoiceMediaChannel channel(&engine, cricket::AudioOptions(),
                                            call.get());
   cricket::AudioRecvParameters parameters;
   parameters.codecs = engine.codecs();
   EXPECT_TRUE(channel.SetRecvParameters(parameters));
 }