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diff --git a/intern/libmv/libmv/autotrack/tracks.h b/intern/libmv/libmv/autotrack/tracks.h
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+// Copyright (c) 2014 libmv authors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//
+// Author: mierle@gmail.com (Keir Mierle)
+
+#ifndef LIBMV_AUTOTRACK_TRACKS_H_
+#define LIBMV_AUTOTRACK_TRACKS_H_
+
+#include "libmv/base/vector.h"
+#include "libmv/autotrack/marker.h"
+
+namespace mv {
+
+using libmv::vector;
+
+// The Tracks container stores correspondences between frames.
+class Tracks {
+ public:
+  Tracks() { }
+  Tracks(const Tracks &other);
+
+  // Create a tracks object with markers already initialized. Copies markers.
+  explicit Tracks(const vector<Marker>& markers);
+
+  // All getters append to the output argument vector.
+  bool GetMarker(int clip, int frame, int track, Marker* marker) const;
+  void GetMarkersForTrack(int track, vector<Marker>* markers) const;
+  void GetMarkersForTrackInClip(int clip,
+                                int track,
+                                vector<Marker>* markers) const;
+  void GetMarkersInFrame(int clip, int frame, vector<Marker>* markers) const;
+
+  // Get the markers in frame1 and frame2 which have a common track.
+  //
+  // This is not the same as the union of the markers in frame1 and
+  // frame2; each marker is for a track that appears in both images.
+  void GetMarkersForTracksInBothImages(int clip1, int frame1,
+                                       int clip2, int frame2,
+                                       vector<Marker>* markers) const;
+
+  void AddMarker(const Marker& marker);
+
+  // Moves the contents of *markers over top of the existing markers. This
+  // destroys *markers in the process (but avoids copies).
+  void SetMarkers(vector<Marker>* markers);
+  bool RemoveMarker(int clip, int frame, int track);
+  void RemoveMarkersForTrack(int track);
+
+  int MaxClip() const;
+  int MaxFrame(int clip) const;
+  int MaxTrack() const;
+  int NumMarkers() const;
+
+  const vector<Marker>& markers() const { return markers_; }
+
+ private:
+  vector<Marker> markers_;
+
+  // TODO(keir): Consider adding access-map data structures to avoid all the
+  // linear lookup penalties for the accessors.
+};
+
+}  // namespace mv
+
+#endif  // LIBMV_AUTOTRACK_TRACKS_H_