libvpx: Pull from upstream

source/libvpx/third_party/libmkv/WebMElement.h

+// 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 MKV_CONTEXT_HPP
+#define MKV_CONTEXT_HPP 1
+
+void writeSimpleBock(EbmlGlobal *ebml, unsigned char trackNumber, unsigned short timeCode,
+                     int isKeyframe, unsigned char lacingFlag, int  discardable,
+                     unsigned char *data, unsigned long dataLength);
+
+
+// these are helper functions
+void writeHeader(EbmlGlobal *ebml);
+void writeSegmentInformation(EbmlGlobal *ebml, EbmlLoc *startInfo, unsigned long timeCodeScale, double duration);
+// this function is a helper only, it assumes a lot of defaults
+void writeVideoTrack(EbmlGlobal *ebml, unsigned int trackNumber, int flagLacing,
+                     char *codecId, unsigned int pixelWidth, unsigned int pixelHeight,
+                     double frameRate);
+void writeAudioTrack(EbmlGlobal *glob, unsigned int trackNumber, int flagLacing,
+                     char *codecId, double samplingFrequency, unsigned int channels,
+                     unsigned char *private, unsigned long privateSize);
+
+void writeSimpleBlock(EbmlGlobal *ebml, unsigned char trackNumber, short timeCode,
+                      int isKeyframe, unsigned char lacingFlag, int discardable,
+                      unsigned char *data, unsigned long dataLength);
+
+
+
+#endif