libvpx: Pull from upstream

source/libvpx/third_party/libwebm/mkvreader.hpp

Index: source/libvpx/third_party/libwebm/mkvreader.hpp
===================================================================
--- source/libvpx/third_party/libwebm/mkvreader.hpp	(revision 0)
+++ source/libvpx/third_party/libwebm/mkvreader.hpp	(revision 0)
@@ -0,0 +1,46 @@
+// Copyright (c) 2010 The WebM 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 MKVREADER_HPP
+#define MKVREADER_HPP
+
+#include "mkvparser.hpp"
+#include <cstdio>
+
+namespace mkvparser
+{
+
+class MkvReader : public IMkvReader
+{
+    MkvReader(const MkvReader&);
+    MkvReader& operator=(const MkvReader&);
+public:
+    MkvReader();
+    MkvReader(FILE* fp);
+    virtual ~MkvReader();
+
+    int Open(const char*);
+    void Close();
+
+    virtual int Read(long long position, long length, unsigned char* buffer);
+    virtual int Length(long long* total, long long* available);
+private:
+
+    // Determines the size of the file. This is called either by the constructor
+    // or by the Open function depending on file ownership. Returns true on
+    // success.
+    bool GetFileSize();
+
+    long long m_length;
+    FILE* m_file;
+    bool reader_owns_file_;
+};
+
+}  //end namespace mkvparser
+
+#endif //MKVREADER_HPP