Fix warnings, simplify ADM.

webrtc/modules/audio_device/audio_device_impl.h

 /*
  *  Copyright (c) 2012 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 24 matching lines @@
     kPlatformMac = 4,
     kPlatformAndroid = 5,
     kPlatformIOS = 6
   };
 
   int32_t CheckPlatform();
   int32_t CreatePlatformSpecificObjects();
   int32_t AttachAudioBuffer();
 
   AudioDeviceModuleImpl(const int32_t id, const AudioLayer audioLayer);
-  virtual ~AudioDeviceModuleImpl();
+  ~AudioDeviceModuleImpl() override;
 
   int64_t TimeUntilNextProcess() override;
   void Process() override;
 
   // Retrieve the currently utilized audio layer
   int32_t ActiveAudioLayer(AudioLayer* audioLayer) const override;
 
   // Error handling
   ErrorCode LastError() const override;
   int32_t RegisterEventObserver(AudioDeviceObserver* eventCallback) override;
@@ skipping 115 matching lines @@
   int32_t SetRecordingSampleRate(const uint32_t samplesPerSec) override;
   int32_t RecordingSampleRate(uint32_t* samplesPerSec) const override;
   int32_t SetPlayoutSampleRate(const uint32_t samplesPerSec) override;
   int32_t PlayoutSampleRate(uint32_t* samplesPerSec) const override;
 
   // Mobile device specific functions
   int32_t ResetAudioDevice() override;
   int32_t SetLoudspeakerStatus(bool enable) override;
   int32_t GetLoudspeakerStatus(bool* enabled) const override;
 
-  bool BuiltInAECIsEnabled() const override;
   bool BuiltInAECIsAvailable() const override;
   int32_t EnableBuiltInAEC(bool enable) override;
   bool BuiltInAGCIsAvailable() const override;
   int32_t EnableBuiltInAGC(bool enable) override;
   bool BuiltInNSIsAvailable() const override;
   int32_t EnableBuiltInNS(bool enable) override;
 
+#if defined(WEBRTC_IOS)
   int GetPlayoutAudioParameters(AudioParameters* params) const override;
   int GetRecordAudioParameters(AudioParameters* params) const override;
+#endif  // WEBRTC_IOS
 
   int32_t Id() { return _id; }
 #if defined(WEBRTC_ANDROID)
   // Only use this acccessor for test purposes on Android.
   AudioManager* GetAndroidAudioManagerForTest() {
     return _audioManagerAndroid.get();
   }
 #endif
   AudioDeviceBuffer* GetAudioDeviceBuffer() { return &_audioDeviceBuffer; }
 
@@ skipping 19 matching lines @@
   PlatformType _platformType;
   bool _initialized;
   mutable ErrorCode _lastError;
 };
 
 }  // namespace webrtc
 
 #endif  // defined(WEBRTC_INCLUDE_INTERNAL_AUDIO_DEVICE)
 
 #endif  // WEBRTC_MODULES_INTERFACE_AUDIO_DEVICE_IMPL_H_