talk/app/webrtc/mediastreamtrackproxy.cc - vendor/opensource/libjingle - Git at Google

 /*
  * libjingle
  * Copyright 2011, Google Inc.
  *
  * 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 notice,
  *     this list of conditions and the following disclaimer in the documentation
  *     and/or other materials provided with the distribution.
  *  3. The name of the author may not be used to endorse or promote products
  *     derived from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include "talk/app/webrtc/mediastreamtrackproxy.h"

 #include "talk/session/phone/videocapturer.h"

 namespace {

 enum {
   MSG_REGISTER_OBSERVER = 1,
   MSG_UNREGISTER_OBSERVER,
   MSG_LABEL,
   MSG_ENABLED,
   MSG_SET_ENABLED,
   MSG_STATE,
   MSG_GET_AUDIODEVICE,
   MSG_GET_VIDEODEVICE,
   MSG_GET_VIDEORENDERER,
   MSG_SET_VIDEORENDERER,
 };

 typedef talk_base::TypedMessageData<std::string*> LabelMessageData;
 typedef talk_base::TypedMessageData<webrtc::ObserverInterface*>
     ObserverMessageData;
 typedef talk_base::TypedMessageData
     <webrtc::MediaStreamTrackInterface::TrackState> TrackStateMessageData;
 typedef talk_base::TypedMessageData<bool> EnableMessageData;


 class AudioDeviceMessageData : public talk_base::MessageData {
  public:
   talk_base::scoped_refptr<webrtc::AudioDeviceModule> audio_device_;
 };

 class VideoDeviceMessageData : public talk_base::MessageData {
  public:
   cricket::VideoCapturer* video_device_;
 };

 class VideoRendererMessageData : public talk_base::MessageData {
  public:
   talk_base::scoped_refptr<webrtc::VideoRendererWrapperInterface>
       video_renderer_;
 };

 }  // namespace anonymous

 namespace webrtc {

 template <class T>
 MediaStreamTrackProxy<T>::MediaStreamTrackProxy(
     talk_base::Thread* signaling_thread)
     : signaling_thread_(signaling_thread) {
 }

 template <class T>
 void MediaStreamTrackProxy<T>::Init(MediaStreamTrackInterface* track) {
   track_ = track;
 }

 template <class T>
 std::string MediaStreamTrackProxy<T>::kind() const {
   return track_->kind();
 }

 template <class T>
 std::string MediaStreamTrackProxy<T>::label() const {
   if (!signaling_thread_->IsCurrent()) {
     std::string label;
     LabelMessageData msg(&label);
     Send(MSG_LABEL, &msg);
     return label;
   }
   return track_->label();
 }

 template <class T>
 MediaStreamTrackInterface::TrackState MediaStreamTrackProxy<T>::state() const {
   if (!signaling_thread_->IsCurrent()) {
     TrackStateMessageData msg(MediaStreamTrackInterface::kInitializing);
     Send(MSG_STATE, &msg);
     return msg.data();
   }
   return track_->state();
 }

 template <class T>
 bool MediaStreamTrackProxy<T>::enabled() const {
   if (!signaling_thread_->IsCurrent()) {
     EnableMessageData msg(false);
     Send(MSG_ENABLED, &msg);
     return msg.data();
   }
   return track_->enabled();
 }

 template <class T>
 bool MediaStreamTrackProxy<T>::set_enabled(bool enable) {
   if (!signaling_thread_->IsCurrent()) {
     EnableMessageData msg(enable);
     Send(MSG_SET_ENABLED, &msg);
     return msg.data();
   }
   return track_->set_enabled(enable);
 }

 template <class T>
 bool MediaStreamTrackProxy<T>::set_state(
     MediaStreamTrackInterface::TrackState new_state) {
   if (!signaling_thread_->IsCurrent()) {
     // State should only be allowed to be changed from the signaling thread.
     ASSERT(!"Not Allowed!");
     return false;
   }
   return track_->set_state(new_state);
 }

 template <class T>
 void MediaStreamTrackProxy<T>::RegisterObserver(ObserverInterface* observer) {
   if (!signaling_thread_->IsCurrent()) {
     ObserverMessageData msg(observer);
     Send(MSG_REGISTER_OBSERVER, &msg);
     return;
   }
   track_->RegisterObserver(observer);
 }

 template <class T>
 void MediaStreamTrackProxy<T>::UnregisterObserver(ObserverInterface* observer) {
   if (!signaling_thread_->IsCurrent()) {
     ObserverMessageData msg(observer);
     Send(MSG_UNREGISTER_OBSERVER, &msg);
     return;
   }
   track_->UnregisterObserver(observer);
 }

 template <class T>
 void MediaStreamTrackProxy<T>::Send(uint32 id,
                                     talk_base::MessageData* data) const {
   signaling_thread_->Send(const_cast<MediaStreamTrackProxy<T>*>(this), id,
                           data);
 }

 template <class T>
 bool MediaStreamTrackProxy<T>::HandleMessage(talk_base::Message* msg) {
   talk_base::MessageData* data = msg->pdata;
   switch (msg->message_id) {
     case MSG_REGISTER_OBSERVER: {
       ObserverMessageData* observer = static_cast<ObserverMessageData*>(data);
       track_->RegisterObserver(observer->data());
       return true;
       break;
     }
     case MSG_UNREGISTER_OBSERVER: {
       ObserverMessageData* observer = static_cast<ObserverMessageData*>(data);
       track_->UnregisterObserver(observer->data());
       return true;
       break;
     }
     case MSG_LABEL: {
       LabelMessageData* label = static_cast<LabelMessageData*>(data);
       *(label->data()) = track_->label();
       return true;
     }
     case MSG_SET_ENABLED: {
       EnableMessageData* enabled = static_cast<EnableMessageData*>(data);
       enabled->data() = track_->set_enabled(enabled->data());
       return true;
       break;
     }
     case MSG_ENABLED: {
       EnableMessageData* enabled = static_cast<EnableMessageData*>(data);
       enabled->data() = track_->enabled();
       return true;
       break;
     }
     case MSG_STATE: {
       TrackStateMessageData* state = static_cast<TrackStateMessageData*>(data);
       state->data() = track_->state();
       return true;
       break;
     }
     default:
       return false;
   }
 }

 AudioTrackProxy::AudioTrackProxy(const std::string& label,
                                  talk_base::Thread* signaling_thread)
     : MediaStreamTrackProxy<LocalAudioTrackInterface>(signaling_thread),
       audio_track_(AudioTrack::CreateRemote(label)) {
   Init(audio_track_);
 }

 AudioTrackProxy::AudioTrackProxy(const std::string& label,
                                  AudioDeviceModule* audio_device,
                                  talk_base::Thread* signaling_thread)
     : MediaStreamTrackProxy<LocalAudioTrackInterface>(signaling_thread),
       audio_track_(AudioTrack::CreateLocal(label, audio_device)) {
   Init(audio_track_);
 }

 AudioTrackProxy::AudioTrackProxy(LocalAudioTrackInterface* implementation,
                                  talk_base::Thread* signaling_thread)
     : MediaStreamTrackProxy<LocalAudioTrackInterface>(signaling_thread),
       audio_track_(implementation) {
   Init(audio_track_);
 }

 talk_base::scoped_refptr<AudioTrackInterface> AudioTrackProxy::CreateRemote(
     const std::string& label,
     talk_base::Thread* signaling_thread) {
   ASSERT(signaling_thread != NULL);
   talk_base::RefCountedObject<AudioTrackProxy>* track =
       new talk_base::RefCountedObject<AudioTrackProxy>(label, signaling_thread);
   return track;
 }

 talk_base::scoped_refptr<LocalAudioTrackInterface> AudioTrackProxy::CreateLocal(
     const std::string& label,
     AudioDeviceModule* audio_device,
     talk_base::Thread* signaling_thread) {
   ASSERT(signaling_thread != NULL);
   talk_base::RefCountedObject<AudioTrackProxy>* track =
       new talk_base::RefCountedObject<AudioTrackProxy>(label,
                                                audio_device,
                                                signaling_thread);
   return track;
 }

 talk_base::scoped_refptr<LocalAudioTrackInterface> AudioTrackProxy::CreateLocal(
     LocalAudioTrackInterface* implementation,
     talk_base::Thread* signaling_thread) {
   ASSERT(signaling_thread != NULL);
   talk_base::RefCountedObject<AudioTrackProxy>* track =
       new talk_base::RefCountedObject<AudioTrackProxy>(implementation,
                                                signaling_thread);
   return track;
 }

 AudioDeviceModule* AudioTrackProxy::GetAudioDevice() {
   if (!signaling_thread_->IsCurrent()) {
     AudioDeviceMessageData msg;
     Send(MSG_GET_AUDIODEVICE, &msg);
     return msg.audio_device_;
   }
   return audio_track_->GetAudioDevice();
 }

 void AudioTrackProxy::OnMessage(talk_base::Message* msg) {
   if (!MediaStreamTrackProxy<LocalAudioTrackInterface>::HandleMessage(msg)) {
     if (msg->message_id == MSG_GET_AUDIODEVICE) {
       AudioDeviceMessageData* audio_device =
           static_cast<AudioDeviceMessageData*>(msg->pdata);
       audio_device->audio_device_ = audio_track_->GetAudioDevice();
     } else {
       ASSERT(!"Not Implemented!");
     }
   }
 }

 VideoTrackProxy::VideoTrackProxy(const std::string& label,
                                  talk_base::Thread* signaling_thread)
     : MediaStreamTrackProxy<LocalVideoTrackInterface>(signaling_thread),
       video_track_(VideoTrack::CreateRemote(label)) {
   Init(video_track_);
 }

 VideoTrackProxy::VideoTrackProxy(const std::string& label,
                                  VideoCaptureModule* video_device,
                                  talk_base::Thread* signaling_thread)
     : MediaStreamTrackProxy<LocalVideoTrackInterface>(signaling_thread),
       video_track_(VideoTrack::CreateLocal(label, video_device)) {
   Init(video_track_);
 }

 VideoTrackProxy::VideoTrackProxy(LocalVideoTrackInterface* implementation,
                                  talk_base::Thread* signaling_thread)
     : MediaStreamTrackProxy<LocalVideoTrackInterface>(signaling_thread),
       video_track_(implementation) {
   Init(video_track_);
 }

 talk_base::scoped_refptr<VideoTrackInterface> VideoTrackProxy::CreateRemote(
     const std::string& label,
     talk_base::Thread* signaling_thread) {
   ASSERT(signaling_thread != NULL);
   talk_base::RefCountedObject<VideoTrackProxy>* track =
       new talk_base::RefCountedObject<VideoTrackProxy>(label, signaling_thread);
   return track;
 }

 talk_base::scoped_refptr<LocalVideoTrackInterface> VideoTrackProxy::CreateLocal(
     const std::string& label,
     VideoCaptureModule* video_device,
     talk_base::Thread* signaling_thread) {
   ASSERT(signaling_thread != NULL);
   talk_base::RefCountedObject<VideoTrackProxy>* track =
       new talk_base::RefCountedObject<VideoTrackProxy>(label, video_device,
                                                        signaling_thread);
   return track;
 }

 talk_base::scoped_refptr<LocalVideoTrackInterface> VideoTrackProxy::CreateLocal(
     LocalVideoTrackInterface* implementation,
     talk_base::Thread* signaling_thread) {
   ASSERT(signaling_thread != NULL);
   talk_base::RefCountedObject<VideoTrackProxy>* track =
       new talk_base::RefCountedObject<VideoTrackProxy>(implementation,
                                                        signaling_thread);
   return track;
 }

 cricket::VideoCapturer* VideoTrackProxy::GetVideoCapture() {
   if (!signaling_thread_->IsCurrent()) {
     VideoDeviceMessageData msg;
     Send(MSG_GET_VIDEODEVICE, &msg);
     return msg.video_device_;
   }
   return video_track_->GetVideoCapture();
 }

 void VideoTrackProxy::SetRenderer(VideoRendererWrapperInterface* renderer) {
   if (!signaling_thread_->IsCurrent()) {
     VideoRendererMessageData msg;
     msg.video_renderer_ = renderer;
     Send(MSG_SET_VIDEORENDERER, &msg);
     return;
   }
   return video_track_->SetRenderer(renderer);
 }

 VideoRendererWrapperInterface* VideoTrackProxy::GetRenderer() {
   if (!signaling_thread_->IsCurrent()) {
     VideoRendererMessageData msg;
     Send(MSG_GET_VIDEORENDERER, &msg);
     return msg.video_renderer_;
   }
   return video_track_->GetRenderer();
 }

 void VideoTrackProxy::OnMessage(talk_base::Message* msg) {
   if (!MediaStreamTrackProxy<LocalVideoTrackInterface>::HandleMessage(msg)) {
     switch (msg->message_id) {
       case  MSG_GET_VIDEODEVICE: {
         VideoDeviceMessageData* video_device =
             static_cast<VideoDeviceMessageData*>(msg->pdata);
         video_device->video_device_ = video_track_->GetVideoCapture();
         break;
       }
       case MSG_GET_VIDEORENDERER: {
         VideoRendererMessageData* video_renderer =
             static_cast<VideoRendererMessageData*>(msg->pdata);
         video_renderer->video_renderer_ = video_track_->GetRenderer();
         break;
       }
       case MSG_SET_VIDEORENDERER: {
         VideoRendererMessageData* video_renderer =
             static_cast<VideoRendererMessageData*>(msg->pdata);
         video_track_->SetRenderer(video_renderer->video_renderer_.get());
         break;
       }
     default:
       ASSERT(!"Not Implemented!");
       break;
     }
   }
 }

 }  // namespace webrtc
	/*
	* libjingle
	* Copyright 2011, Google Inc.
	*
	* 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 notice,
	* this list of conditions and the following disclaimer in the documentation
	* and/or other materials provided with the distribution.
	* 3. The name of the author may not be used to endorse or promote products
	* derived from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
	* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
	* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include "talk/app/webrtc/mediastreamtrackproxy.h"

	#include "talk/session/phone/videocapturer.h"

	namespace {

	enum {
	MSG_REGISTER_OBSERVER = 1,
	MSG_UNREGISTER_OBSERVER,
	MSG_LABEL,
	MSG_ENABLED,
	MSG_SET_ENABLED,
	MSG_STATE,
	MSG_GET_AUDIODEVICE,
	MSG_GET_VIDEODEVICE,
	MSG_GET_VIDEORENDERER,
	MSG_SET_VIDEORENDERER,
	};

	typedef talk_base::TypedMessageData<std::string*> LabelMessageData;
	typedef talk_base::TypedMessageData<webrtc::ObserverInterface*>
	ObserverMessageData;
	typedef talk_base::TypedMessageData
	<webrtc::MediaStreamTrackInterface::TrackState> TrackStateMessageData;
	typedef talk_base::TypedMessageData<bool> EnableMessageData;


	class AudioDeviceMessageData : public talk_base::MessageData {
	public:
	talk_base::scoped_refptr<webrtc::AudioDeviceModule> audio_device_;
	};

	class VideoDeviceMessageData : public talk_base::MessageData {
	public:
	cricket::VideoCapturer* video_device_;
	};

	class VideoRendererMessageData : public talk_base::MessageData {
	public:
	talk_base::scoped_refptr<webrtc::VideoRendererWrapperInterface>
	video_renderer_;
	};

	} // namespace anonymous

	namespace webrtc {

	template <class T>
	MediaStreamTrackProxy<T>::MediaStreamTrackProxy(
	talk_base::Thread* signaling_thread)
	: signaling_thread_(signaling_thread) {
	}

	template <class T>
	void MediaStreamTrackProxy<T>::Init(MediaStreamTrackInterface* track) {
	track_ = track;
	}

	template <class T>
	std::string MediaStreamTrackProxy<T>::kind() const {
	return track_->kind();
	}

	template <class T>
	std::string MediaStreamTrackProxy<T>::label() const {
	if (!signaling_thread_->IsCurrent()) {
	std::string label;
	LabelMessageData msg(&label);
	Send(MSG_LABEL, &msg);
	return label;
	}
	return track_->label();
	}

	template <class T>
	MediaStreamTrackInterface::TrackState MediaStreamTrackProxy<T>::state() const {
	if (!signaling_thread_->IsCurrent()) {
	TrackStateMessageData msg(MediaStreamTrackInterface::kInitializing);
	Send(MSG_STATE, &msg);
	return msg.data();
	}
	return track_->state();
	}

	template <class T>
	bool MediaStreamTrackProxy<T>::enabled() const {
	if (!signaling_thread_->IsCurrent()) {
	EnableMessageData msg(false);
	Send(MSG_ENABLED, &msg);
	return msg.data();
	}
	return track_->enabled();
	}

	template <class T>
	bool MediaStreamTrackProxy<T>::set_enabled(bool enable) {
	if (!signaling_thread_->IsCurrent()) {
	EnableMessageData msg(enable);
	Send(MSG_SET_ENABLED, &msg);
	return msg.data();
	}
	return track_->set_enabled(enable);
	}

	template <class T>
	bool MediaStreamTrackProxy<T>::set_state(
	MediaStreamTrackInterface::TrackState new_state) {
	if (!signaling_thread_->IsCurrent()) {
	// State should only be allowed to be changed from the signaling thread.
	ASSERT(!"Not Allowed!");
	return false;
	}
	return track_->set_state(new_state);
	}

	template <class T>
	void MediaStreamTrackProxy<T>::RegisterObserver(ObserverInterface* observer) {
	if (!signaling_thread_->IsCurrent()) {
	ObserverMessageData msg(observer);
	Send(MSG_REGISTER_OBSERVER, &msg);
	return;
	}
	track_->RegisterObserver(observer);
	}

	template <class T>
	void MediaStreamTrackProxy<T>::UnregisterObserver(ObserverInterface* observer) {
	if (!signaling_thread_->IsCurrent()) {
	ObserverMessageData msg(observer);
	Send(MSG_UNREGISTER_OBSERVER, &msg);
	return;
	}
	track_->UnregisterObserver(observer);
	}

	template <class T>
	void MediaStreamTrackProxy<T>::Send(uint32 id,
	talk_base::MessageData* data) const {
	signaling_thread_->Send(const_cast<MediaStreamTrackProxy<T>*>(this), id,
	data);
	}

	template <class T>
	bool MediaStreamTrackProxy<T>::HandleMessage(talk_base::Message* msg) {
	talk_base::MessageData* data = msg->pdata;
	switch (msg->message_id) {
	case MSG_REGISTER_OBSERVER: {
	ObserverMessageData* observer = static_cast<ObserverMessageData*>(data);
	track_->RegisterObserver(observer->data());
	return true;
	break;
	}
	case MSG_UNREGISTER_OBSERVER: {
	ObserverMessageData* observer = static_cast<ObserverMessageData*>(data);
	track_->UnregisterObserver(observer->data());
	return true;
	break;
	}
	case MSG_LABEL: {
	LabelMessageData* label = static_cast<LabelMessageData*>(data);
	*(label->data()) = track_->label();
	return true;
	}
	case MSG_SET_ENABLED: {
	EnableMessageData* enabled = static_cast<EnableMessageData*>(data);
	enabled->data() = track_->set_enabled(enabled->data());
	return true;
	break;
	}
	case MSG_ENABLED: {
	EnableMessageData* enabled = static_cast<EnableMessageData*>(data);
	enabled->data() = track_->enabled();
	return true;
	break;
	}
	case MSG_STATE: {
	TrackStateMessageData* state = static_cast<TrackStateMessageData*>(data);
	state->data() = track_->state();
	return true;
	break;
	}
	default:
	return false;
	}
	}

	AudioTrackProxy::AudioTrackProxy(const std::string& label,
	talk_base::Thread* signaling_thread)
	: MediaStreamTrackProxy<LocalAudioTrackInterface>(signaling_thread),
	audio_track_(AudioTrack::CreateRemote(label)) {
	Init(audio_track_);
	}

	AudioTrackProxy::AudioTrackProxy(const std::string& label,
	AudioDeviceModule* audio_device,
	talk_base::Thread* signaling_thread)
	: MediaStreamTrackProxy<LocalAudioTrackInterface>(signaling_thread),
	audio_track_(AudioTrack::CreateLocal(label, audio_device)) {
	Init(audio_track_);
	}

	AudioTrackProxy::AudioTrackProxy(LocalAudioTrackInterface* implementation,
	talk_base::Thread* signaling_thread)
	: MediaStreamTrackProxy<LocalAudioTrackInterface>(signaling_thread),
	audio_track_(implementation) {
	Init(audio_track_);
	}

	talk_base::scoped_refptr<AudioTrackInterface> AudioTrackProxy::CreateRemote(
	const std::string& label,
	talk_base::Thread* signaling_thread) {
	ASSERT(signaling_thread != NULL);
	talk_base::RefCountedObject<AudioTrackProxy>* track =
	new talk_base::RefCountedObject<AudioTrackProxy>(label, signaling_thread);
	return track;
	}

	talk_base::scoped_refptr<LocalAudioTrackInterface> AudioTrackProxy::CreateLocal(
	const std::string& label,
	AudioDeviceModule* audio_device,
	talk_base::Thread* signaling_thread) {
	ASSERT(signaling_thread != NULL);
	talk_base::RefCountedObject<AudioTrackProxy>* track =
	new talk_base::RefCountedObject<AudioTrackProxy>(label,
	audio_device,
	signaling_thread);
	return track;
	}

	talk_base::scoped_refptr<LocalAudioTrackInterface> AudioTrackProxy::CreateLocal(
	LocalAudioTrackInterface* implementation,
	talk_base::Thread* signaling_thread) {
	ASSERT(signaling_thread != NULL);
	talk_base::RefCountedObject<AudioTrackProxy>* track =
	new talk_base::RefCountedObject<AudioTrackProxy>(implementation,
	signaling_thread);
	return track;
	}

	AudioDeviceModule* AudioTrackProxy::GetAudioDevice() {
	if (!signaling_thread_->IsCurrent()) {
	AudioDeviceMessageData msg;
	Send(MSG_GET_AUDIODEVICE, &msg);
	return msg.audio_device_;
	}
	return audio_track_->GetAudioDevice();
	}

	void AudioTrackProxy::OnMessage(talk_base::Message* msg) {
	if (!MediaStreamTrackProxy<LocalAudioTrackInterface>::HandleMessage(msg)) {
	if (msg->message_id == MSG_GET_AUDIODEVICE) {
	AudioDeviceMessageData* audio_device =
	static_cast<AudioDeviceMessageData*>(msg->pdata);
	audio_device->audio_device_ = audio_track_->GetAudioDevice();
	} else {
	ASSERT(!"Not Implemented!");
	}
	}
	}

	VideoTrackProxy::VideoTrackProxy(const std::string& label,
	talk_base::Thread* signaling_thread)
	: MediaStreamTrackProxy<LocalVideoTrackInterface>(signaling_thread),
	video_track_(VideoTrack::CreateRemote(label)) {
	Init(video_track_);
	}

	VideoTrackProxy::VideoTrackProxy(const std::string& label,
	VideoCaptureModule* video_device,
	talk_base::Thread* signaling_thread)
	: MediaStreamTrackProxy<LocalVideoTrackInterface>(signaling_thread),
	video_track_(VideoTrack::CreateLocal(label, video_device)) {
	Init(video_track_);
	}

	VideoTrackProxy::VideoTrackProxy(LocalVideoTrackInterface* implementation,
	talk_base::Thread* signaling_thread)
	: MediaStreamTrackProxy<LocalVideoTrackInterface>(signaling_thread),
	video_track_(implementation) {
	Init(video_track_);
	}

	talk_base::scoped_refptr<VideoTrackInterface> VideoTrackProxy::CreateRemote(
	const std::string& label,
	talk_base::Thread* signaling_thread) {
	ASSERT(signaling_thread != NULL);
	talk_base::RefCountedObject<VideoTrackProxy>* track =
	new talk_base::RefCountedObject<VideoTrackProxy>(label, signaling_thread);
	return track;
	}

	talk_base::scoped_refptr<LocalVideoTrackInterface> VideoTrackProxy::CreateLocal(
	const std::string& label,
	VideoCaptureModule* video_device,
	talk_base::Thread* signaling_thread) {
	ASSERT(signaling_thread != NULL);
	talk_base::RefCountedObject<VideoTrackProxy>* track =
	new talk_base::RefCountedObject<VideoTrackProxy>(label, video_device,
	signaling_thread);
	return track;
	}

	talk_base::scoped_refptr<LocalVideoTrackInterface> VideoTrackProxy::CreateLocal(
	LocalVideoTrackInterface* implementation,
	talk_base::Thread* signaling_thread) {
	ASSERT(signaling_thread != NULL);
	talk_base::RefCountedObject<VideoTrackProxy>* track =
	new talk_base::RefCountedObject<VideoTrackProxy>(implementation,
	signaling_thread);
	return track;
	}

	cricket::VideoCapturer* VideoTrackProxy::GetVideoCapture() {
	if (!signaling_thread_->IsCurrent()) {
	VideoDeviceMessageData msg;
	Send(MSG_GET_VIDEODEVICE, &msg);
	return msg.video_device_;
	}
	return video_track_->GetVideoCapture();
	}

	void VideoTrackProxy::SetRenderer(VideoRendererWrapperInterface* renderer) {
	if (!signaling_thread_->IsCurrent()) {
	VideoRendererMessageData msg;
	msg.video_renderer_ = renderer;
	Send(MSG_SET_VIDEORENDERER, &msg);
	return;
	}
	return video_track_->SetRenderer(renderer);
	}

	VideoRendererWrapperInterface* VideoTrackProxy::GetRenderer() {
	if (!signaling_thread_->IsCurrent()) {
	VideoRendererMessageData msg;
	Send(MSG_GET_VIDEORENDERER, &msg);
	return msg.video_renderer_;
	}
	return video_track_->GetRenderer();
	}

	void VideoTrackProxy::OnMessage(talk_base::Message* msg) {
	if (!MediaStreamTrackProxy<LocalVideoTrackInterface>::HandleMessage(msg)) {
	switch (msg->message_id) {
	case MSG_GET_VIDEODEVICE: {
	VideoDeviceMessageData* video_device =
	static_cast<VideoDeviceMessageData*>(msg->pdata);
	video_device->video_device_ = video_track_->GetVideoCapture();
	break;
	}
	case MSG_GET_VIDEORENDERER: {
	VideoRendererMessageData* video_renderer =
	static_cast<VideoRendererMessageData*>(msg->pdata);
	video_renderer->video_renderer_ = video_track_->GetRenderer();
	break;
	}
	case MSG_SET_VIDEORENDERER: {
	VideoRendererMessageData* video_renderer =
	static_cast<VideoRendererMessageData*>(msg->pdata);
	video_track_->SetRenderer(video_renderer->video_renderer_.get());
	break;
	}
	default:
	ASSERT(!"Not Implemented!");
	break;
	}
	}
	}

	} // namespace webrtc