libvpx: Pull from upstream

source/libvpx/video_writer.h

Index: source/libvpx/video_writer.h
===================================================================
--- source/libvpx/video_writer.h	(revision 0)
+++ source/libvpx/video_writer.h	(revision 0)
@@ -0,0 +1,47 @@
+/*
+ *  Copyright (c) 2014 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 VIDEO_WRITER_H_
+#define VIDEO_WRITER_H_
+
+#include "./video_common.h"
+
+typedef enum {
+  kContainerIVF
+} VpxContainer;
+
+struct VpxVideoWriterStruct;
+typedef struct VpxVideoWriterStruct VpxVideoWriter;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Finds and opens writer for specified container format.
+// Returns an opaque VpxVideoWriter* upon success, or NULL upon failure.
+// Right now only IVF format is supported.
+VpxVideoWriter *vpx_video_writer_open(const char *filename,
+                                      VpxContainer container,
+                                      const VpxVideoInfo *info);
+
+// Frees all resources associated with VpxVideoWriter* returned from
+// vpx_video_writer_open() call.
+void vpx_video_writer_close(VpxVideoWriter *writer);
+
+// Writes frame bytes to the file.
+int vpx_video_writer_write_frame(VpxVideoWriter *writer,
+                                 const uint8_t *buffer, size_t size,
+                                 int64_t pts);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // VIDEO_WRITER_H_