|  | /* | 
|  | *  Copyright 2017 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. | 
|  | */ | 
|  |  | 
|  | #include "api/media_stream_interface.h" | 
|  |  | 
|  | #include "api/audio_options.h" | 
|  | #include "api/media_types.h" | 
|  | #include "api/scoped_refptr.h" | 
|  |  | 
|  | namespace webrtc { | 
|  |  | 
|  | const char* const MediaStreamTrackInterface::kVideoKind = kMediaTypeVideo; | 
|  | const char* const MediaStreamTrackInterface::kAudioKind = kMediaTypeAudio; | 
|  |  | 
|  | VideoTrackInterface::ContentHint VideoTrackInterface::content_hint() const { | 
|  | return ContentHint::kNone; | 
|  | } | 
|  |  | 
|  | bool AudioTrackInterface::GetSignalLevel(int* /* level */) { | 
|  | return false; | 
|  | } | 
|  |  | 
|  | scoped_refptr<AudioProcessorInterface> | 
|  | AudioTrackInterface::GetAudioProcessor() { | 
|  | return nullptr; | 
|  | } | 
|  |  | 
|  | const AudioOptions AudioSourceInterface::options() const { | 
|  | return {}; | 
|  | } | 
|  |  | 
|  | }  // namespace webrtc |