Support for remote audio into tracks

talk/app/webrtc/remoteaudiotrack.h

 /*
  * libjingle
  * Copyright 2015 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,
@@ skipping 10 matching lines @@
  * 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.
  */
 
 #ifndef TALK_APP_WEBRTC_REMOTEAUDIOTRACK_H_
 #define TALK_APP_WEBRTC_REMOTEAUDIOTRACK_H_
 
+#include <string>
+
+#include "talk/app/webrtc/mediastreaminterface.h"
+#include "talk/app/webrtc/mediastreamtrack.h"
+#include "talk/app/webrtc/notifier.h"
+#include "webrtc/base/scoped_ptr.h"
+#include "webrtc/base/scoped_ref_ptr.h"
+
+namespace webrtc {
+
+class RemoteAudioSource;
+
+class RemoteAudioTrack : public MediaStreamTrack<AudioTrackInterface>,
+                         public ObserverInterface {
+ protected:
+  // Protected ctor to force use of factory method.
+  RemoteAudioTrack(const std::string& label,
+                   const rtc::scoped_refptr<RemoteAudioSource>& source);
+  ~RemoteAudioTrack() override;
+
+ public:
+  static rtc::scoped_refptr<RemoteAudioTrack> Create(
+      const std::string& id,
+      const rtc::scoped_refptr<RemoteAudioSource>& source);
+
+ private:
+  // MediaStreamTrack implementation.
+  std::string kind() const override;
+
+  // AudioTrackInterface implementation.
+  AudioSourceInterface* GetSource() const override;
+
+  void AddSink(AudioTrackSinkInterface* sink) override;
+  void RemoveSink(AudioTrackSinkInterface* sink) override;
+  bool GetSignalLevel(int* level) override;
+
+  // ObserverInterface implementation.
+  void OnChanged() override;
+
+ private:
+  const rtc::scoped_refptr<RemoteAudioSource> audio_source_;
+};
+
+}  // namespace webrtc
+
 #endif  // TALK_APP_WEBRTC_REMOTEAUDIOTRACK_H_