Add AudioSendStream::SetMuted() method and use it in WVoMC::MuteStream().

webrtc/media/engine/webrtcvoiceengine_unittest.cc

 /*
  *  Copyright (c) 2008 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 2117 matching lines @@
   EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
   EXPECT_TRUE(channel_->SetAudioSend(kSsrc1, true, nullptr, nullptr));
   SetSend(channel_, true);
   EXPECT_FALSE(GetSendStream(kSsrc1).IsSending());
   EXPECT_TRUE(channel_->SetAudioSend(kSsrc1, true, nullptr, &fake_source_));
   EXPECT_TRUE(GetSendStream(kSsrc1).IsSending());
   EXPECT_TRUE(channel_->SetAudioSend(kSsrc1, true, nullptr, nullptr));
   EXPECT_FALSE(GetSendStream(kSsrc1).IsSending());
 }
 
+// Test that a channel is muted/unmuted.
+TEST_F(WebRtcVoiceEngineTestFake, SendStateMuteUnmute) {
+  EXPECT_TRUE(SetupSendStream());
+  EXPECT_TRUE(channel_->SetSendParameters(send_parameters_));
+  EXPECT_FALSE(GetSendStream(kSsrc1).muted());
+  EXPECT_TRUE(channel_->SetAudioSend(kSsrc1, true, nullptr, nullptr));
+  EXPECT_FALSE(GetSendStream(kSsrc1).muted());
+  EXPECT_TRUE(channel_->SetAudioSend(kSsrc1, false, nullptr, nullptr));
+  EXPECT_TRUE(GetSendStream(kSsrc1).muted());
+}
+
 // Test that SetSendParameters() does not alter a stream's send state.
 TEST_F(WebRtcVoiceEngineTestFake, SendStateWhenStreamsAreRecreated) {
   EXPECT_TRUE(SetupSendStream());
   EXPECT_FALSE(GetSendStream(kSsrc1).IsSending());
 
   // Turn on sending.
   SetSend(channel_, true);
   EXPECT_TRUE(GetSendStream(kSsrc1).IsSending());
 
   // Changing RTP header extensions will recreate the AudioSendStream.
@@ skipping 1367 matching lines @@
   cricket::WebRtcVoiceEngine engine(
       nullptr, webrtc::CreateBuiltinAudioDecoderFactory());
   std::unique_ptr<webrtc::Call> call(
       webrtc::Call::Create(webrtc::Call::Config()));
   cricket::WebRtcVoiceMediaChannel channel(&engine, cricket::MediaConfig(),
                                            cricket::AudioOptions(), call.get());
   cricket::AudioRecvParameters parameters;
   parameters.codecs = engine.recv_codecs();
   EXPECT_TRUE(channel.SetRecvParameters(parameters));
 }