libvpx: Pull from upstream

source/libvpx/video_reader.h

Index: source/libvpx/video_reader.h
===================================================================
--- source/libvpx/video_reader.h	(revision 0)
+++ source/libvpx/video_reader.h	(revision 0)
@@ -0,0 +1,52 @@
+/*
+ *  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_READER_H_
+#define VIDEO_READER_H_
+
+#include "./video_common.h"
+
+// The following code is work in progress. It is going to  support transparent
+// reading of input files. Right now only IVF format is supported for
+// simplicity. The main goal the API is to be simple and easy to use in example
+// code and in vpxenc/vpxdec later. All low-level details like memory
+// buffer management are hidden from API users.
+struct VpxVideoReaderStruct;
+typedef struct VpxVideoReaderStruct VpxVideoReader;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Opens the input file for reading and inspects it to determine file type.
+// Returns an opaque VpxVideoReader* upon success, or NULL upon failure.
+// Right now only IVF format is supported.
+VpxVideoReader *vpx_video_reader_open(const char *filename);
+
+// Frees all resources associated with VpxVideoReader* returned from
+// vpx_video_reader_open() call.
+void vpx_video_reader_close(VpxVideoReader *reader);
+
+// Reads frame from the file and stores it in internal buffer.
+int vpx_video_reader_read_frame(VpxVideoReader *reader);
+
+// Returns the pointer to memory buffer with frame data read by last call to
+// vpx_video_reader_read_frame().
+const uint8_t *vpx_video_reader_get_frame(VpxVideoReader *reader,
+                                          size_t *size);
+
+// Fills VpxVideoInfo with information from opened video file.
+const VpxVideoInfo *vpx_video_reader_get_info(VpxVideoReader *reader);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // VIDEO_READER_H_