Move talk/app/webrtc to webrtc/api

webrtc/api/mediastreamtrack.h

Index: webrtc/api/mediastreamtrack.h
diff --git a/webrtc/api/mediastreamtrack.h b/webrtc/api/mediastreamtrack.h
new file mode 100644
index 0000000000000000000000000000000000000000..dcac58128b9146eec7ba94748f6649b9b4c523b3
--- /dev/null
+++ b/webrtc/api/mediastreamtrack.h
@@ -0,0 +1,64 @@
+/*
+ *  Copyright 2011 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.
+ */
+
+#ifndef WEBRTC_API_MEDIASTREAMTRACK_H_
+#define WEBRTC_API_MEDIASTREAMTRACK_H_
+
+#include <string>
+
+#include "webrtc/api/mediastreaminterface.h"
+#include "webrtc/api/notifier.h"
+
+namespace webrtc {
+
+// MediaTrack implements the interface common to AudioTrackInterface and
+// VideoTrackInterface.
+template <typename T>
+class MediaStreamTrack : public Notifier<T> {
+ public:
+  typedef typename T::TrackState TypedTrackState;
+
+  virtual std::string id() const { return id_; }
+  virtual MediaStreamTrackInterface::TrackState state() const {
+    return state_;
+  }
+  virtual bool enabled() const { return enabled_; }
+  virtual bool set_enabled(bool enable) {
+    bool fire_on_change = (enable != enabled_);
+    enabled_ = enable;
+    if (fire_on_change) {
+      Notifier<T>::FireOnChanged();
+    }
+    return fire_on_change;
+  }
+  virtual bool set_state(MediaStreamTrackInterface::TrackState new_state) {
+    bool fire_on_change = (state_ != new_state);
+    state_ = new_state;
+    if (fire_on_change)
+      Notifier<T>::FireOnChanged();
+    return true;
+  }
+
+ protected:
+  explicit MediaStreamTrack(const std::string& id)
+      : enabled_(true),
+        id_(id),
+        state_(MediaStreamTrackInterface::kInitializing) {
+  }
+
+ private:
+  bool enabled_;
+  std::string id_;
+  MediaStreamTrackInterface::TrackState state_;
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_API_MEDIASTREAMTRACK_H_