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diff --git a/media/libaom/src/common/y4minput.h b/media/libaom/src/common/y4minput.h
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+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ *
+ * Based on code from the OggTheora software codec source code,
+ * Copyright (C) 2002-2010 The Xiph.Org Foundation and contributors.
+ */
+
+#ifndef AOM_COMMON_Y4MINPUT_H_
+#define AOM_COMMON_Y4MINPUT_H_
+
+#include <stdio.h>
+#include "aom/aom_image.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct y4m_input y4m_input;
+
+/*The function used to perform chroma conversion.*/
+typedef void (*y4m_convert_func)(y4m_input *_y4m, unsigned char *_dst,
+ unsigned char *_src);
+
+struct y4m_input {
+ int pic_w;
+ int pic_h;
+ int fps_n;
+ int fps_d;
+ int par_n;
+ int par_d;
+ char interlace;
+ int src_c_dec_h;
+ int src_c_dec_v;
+ int dst_c_dec_h;
+ int dst_c_dec_v;
+ char chroma_type[16];
+ /*The size of each converted frame buffer.*/
+ size_t dst_buf_sz;
+ /*The amount to read directly into the converted frame buffer.*/
+ size_t dst_buf_read_sz;
+ /*The size of the auxilliary buffer.*/
+ size_t aux_buf_sz;
+ /*The amount to read into the auxilliary buffer.*/
+ size_t aux_buf_read_sz;
+ y4m_convert_func convert;
+ unsigned char *dst_buf;
+ unsigned char *aux_buf;
+ enum aom_img_fmt aom_fmt;
+ int bps;
+ unsigned int bit_depth;
+};
+
+int y4m_input_open(y4m_input *_y4m, FILE *_fin, char *_skip, int _nskip,
+ int only_420);
+void y4m_input_close(y4m_input *_y4m);
+int y4m_input_fetch_frame(y4m_input *_y4m, FILE *_fin, aom_image_t *img);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // AOM_COMMON_Y4MINPUT_H_