Let Contraints Controll Mute/Unmute Audio Local Playback For Desktop Sharing

third_party/WebKit/Source/modules/mediastream/MediaConstraintsImpl.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * 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
@@ skipping 67 matching lines @@
 const char kMediaStreamSourceId[] =
     "chromeMediaSourceId";                           // mapped to deviceId
 const char kMediaStreamSourceInfoId[] = "sourceId";  // mapped to deviceId
 const char kMediaStreamRenderToAssociatedSink[] =
     "chromeRenderToAssociatedSink";
 // RenderToAssociatedSink will be going away in M50-M60 some time.
 const char kMediaStreamAudioHotword[] = "googHotword";
 // TODO(hta): googHotword should go away. https://crbug.com/577627
 // From content/renderer/media/media_stream_audio_processor_options.cc
 const char kEchoCancellation[] = "echoCancellation";
+const char kDisableLocalEcho[] = "disableLocalEcho";
 const char kGoogEchoCancellation[] = "googEchoCancellation";
 const char kGoogExperimentalEchoCancellation[] = "googEchoCancellation2";
 const char kGoogAutoGainControl[] = "googAutoGainControl";
 const char kGoogExperimentalAutoGainControl[] = "googAutoGainControl2";
 const char kGoogNoiseSuppression[] = "googNoiseSuppression";
 const char kGoogExperimentalNoiseSuppression[] = "googNoiseSuppression2";
 const char kGoogBeamforming[] = "googBeamforming";
 const char kGoogArrayGeometry[] = "googArrayGeometry";
 const char kGoogHighpassFilter[] = "googHighpassFilter";
 const char kGoogTypingNoiseDetection[] = "googTypingNoiseDetection";
@@ skipping 193 matching lines @@
       result.frameRate.setMin(atof(constraint.m_value.utf8().c_str()));
     } else if (constraint.m_name.equals(kMaxFrameRate)) {
       result.frameRate.setMax(atof(constraint.m_value.utf8().c_str()));
     } else if (constraint.m_name.equals(kEchoCancellation)) {
       result.echoCancellation.setExact(toBoolean(constraint.m_value));
     } else if (constraint.m_name.equals(kMediaStreamSource)) {
       // TODO(hta): This has only a few legal values. Should be
       // represented as an enum, and cause type errors.
       // https://crbug.com/576582
       result.mediaStreamSource.setExact(constraint.m_value);
+    } else if (constraint.m_name.equals(kDisableLocalEcho) &&
+               RuntimeEnabledFeatures::
+                   desktopCaptureDisableLocalEchoControlEnabled()) {
+      result.disableLocalEcho.setExact(toBoolean(constraint.m_value));
     } else if (constraint.m_name.equals(kMediaStreamSourceId) ||
                constraint.m_name.equals(kMediaStreamSourceInfoId)) {
       result.deviceId.setExact(constraint.m_value);
     } else if (constraint.m_name.equals(kMediaStreamRenderToAssociatedSink)) {
       // TODO(hta): This is a boolean represented as string.
       // Should give TypeError when it's not parseable.
       // https://crbug.com/576582
       result.renderToAssociatedSink.setExact(toBoolean(constraint.m_value));
     } else if (constraint.m_name.equals(kMediaStreamAudioHotword)) {
       result.hotwordEnabled.setExact(toBoolean(constraint.m_value));
@@ skipping 484 matching lines @@
     MediaTrackConstraintSet element;
     convertConstraintSet(it, element);
     advancedVector.append(element);
   }
   if (!advancedVector.isEmpty())
     output.setAdvanced(advancedVector);
 }
 
 }  // namespace MediaConstraintsImpl
 }  // namespace blink