Removes automatic setting of COMM mode in WebRTC

webrtc/modules/audio_device/android/audio_device_template.h

 /*
  *  Copyright (c) 2013 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 107 matching lines @@
     FATAL() << "Should never be called";
     return -1;
   }
 
   int32_t PlayoutIsAvailable(bool& available) override {
     available = true;
     return 0;
   }
 
   int32_t InitPlayout() override {
-    // Switches the Android audio mode to MODE_IN_COMMUNICATION to ensure that
-    // audio routing, volume control and echo performance are the best possible
-    // for VoIP. InitRecording() does the same type of call but only the first
-    // call has any effect.
-    // This call does nothing if MODE_IN_COMMUNICATION was already set.
-    audio_manager_->SetCommunicationMode(true);
     return output_.InitPlayout();
   }
 
   bool PlayoutIsInitialized() const override {
     return output_.PlayoutIsInitialized();
   }
 
   int32_t RecordingIsAvailable(bool& available) override {
     available = true;
     return 0;
   }
 
   int32_t InitRecording() override {
-    // Switches the Android audio mode to MODE_IN_COMMUNICATION to ensure that
-    // audio routing, volume control and echo performance are the best possible
-    // for VoIP. InitRecording() does the same type of call but only the first
-    // call has any effect.
-    // This call does nothing if MODE_IN_COMMUNICATION was already set.
-    audio_manager_->SetCommunicationMode(true);
     return input_.InitRecording();
   }
 
   bool RecordingIsInitialized() const override {
     return input_.RecordingIsInitialized();
   }
 
   int32_t StartPlayout() override {
+    DCHECK(audio_manager_->IsCommunicationModeEnabled());
     return output_.StartPlayout();
   }
 
   int32_t StopPlayout() override {
     // Avoid using audio manger (JNI/Java cost) if playout was inactive.
     if (!Playing())
       return 0;
     int32_t err = output_.StopPlayout();
-    if (!Recording()) {
-      // Restore initial audio mode since all audio streaming is disabled.
-      // The default mode was stored in Init().
-      audio_manager_->SetCommunicationMode(false);
-    }
     return err;
   }
 
   bool Playing() const override {
     return output_.Playing();
   }
 
   int32_t StartRecording() override {
+    DCHECK(audio_manager_->IsCommunicationModeEnabled());
     return input_.StartRecording();
   }
 
   int32_t StopRecording() override {
     // Avoid using audio manger (JNI/Java cost) if recording was inactive.
     if (!Recording())
       return 0;
     int32_t err = input_.StopRecording();
-    if (!Playing()) {
-      // Restore initial audio mode since all audio streaming is disabled.
-      // The default mode was is stored in Init().
-      audio_manager_->SetCommunicationMode(false);
-    }
     return err;
   }
 
   bool Recording() const override {
     return input_.Recording() ;
   }
 
   int32_t SetAGC(bool enable) override {
     if (enable) {
       FATAL() << "Should never be called";
@@ skipping 268 matching lines @@
   OutputType output_;
 
   InputType input_;
 
   bool initialized_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_DEVICE_ANDROID_AUDIO_DEVICE_TEMPLATE_H_