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diff --git a/media/libvpx/vp9/common/vp9_enums.h b/media/libvpx/vp9/common/vp9_enums.h
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+/*
+ * 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 VP9_COMMON_VP9_ENUMS_H_
+#define VP9_COMMON_VP9_ENUMS_H_
+
+#include "./vpx_config.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define MI_SIZE_LOG2 3
+#define MI_BLOCK_SIZE_LOG2 (6 - MI_SIZE_LOG2) // 64 = 2^6
+
+#define MI_SIZE (1 << MI_SIZE_LOG2) // pixels per mi-unit
+#define MI_BLOCK_SIZE (1 << MI_BLOCK_SIZE_LOG2) // mi-units per max block
+
+#define MI_MASK (MI_BLOCK_SIZE - 1)
+
+// Bitstream profiles indicated by 2-3 bits in the uncompressed header.
+// 00: Profile 0. 8-bit 4:2:0 only.
+// 10: Profile 1. 8-bit 4:4:4, 4:2:2, and 4:4:0.
+// 01: Profile 2. 10-bit and 12-bit color only, with 4:2:0 sampling.
+// 110: Profile 3. 10-bit and 12-bit color only, with 4:2:2/4:4:4/4:4:0
+// sampling.
+// 111: Undefined profile.
+typedef enum BITSTREAM_PROFILE {
+ PROFILE_0,
+ PROFILE_1,
+ PROFILE_2,
+ PROFILE_3,
+ MAX_PROFILES
+} BITSTREAM_PROFILE;
+
+typedef enum BLOCK_SIZE {
+ BLOCK_4X4,
+ BLOCK_4X8,
+ BLOCK_8X4,
+ BLOCK_8X8,
+ BLOCK_8X16,
+ BLOCK_16X8,
+ BLOCK_16X16,
+ BLOCK_16X32,
+ BLOCK_32X16,
+ BLOCK_32X32,
+ BLOCK_32X64,
+ BLOCK_64X32,
+ BLOCK_64X64,
+ BLOCK_SIZES,
+ BLOCK_INVALID = BLOCK_SIZES
+} BLOCK_SIZE;
+
+typedef enum PARTITION_TYPE {
+ PARTITION_NONE,
+ PARTITION_HORZ,
+ PARTITION_VERT,
+ PARTITION_SPLIT,
+ PARTITION_TYPES,
+ PARTITION_INVALID = PARTITION_TYPES
+} PARTITION_TYPE;
+
+typedef char PARTITION_CONTEXT;
+#define PARTITION_PLOFFSET 4 // number of probability models per block size
+#define PARTITION_CONTEXTS (4 * PARTITION_PLOFFSET)
+
+// block transform size
+typedef enum {
+ TX_4X4 = 0, // 4x4 transform
+ TX_8X8 = 1, // 8x8 transform
+ TX_16X16 = 2, // 16x16 transform
+ TX_32X32 = 3, // 32x32 transform
+ TX_SIZES
+} TX_SIZE;
+
+// frame transform mode
+typedef enum {
+ ONLY_4X4 = 0, // only 4x4 transform used
+ ALLOW_8X8 = 1, // allow block transform size up to 8x8
+ ALLOW_16X16 = 2, // allow block transform size up to 16x16
+ ALLOW_32X32 = 3, // allow block transform size up to 32x32
+ TX_MODE_SELECT = 4, // transform specified for each block
+ TX_MODES = 5,
+} TX_MODE;
+
+typedef enum {
+ DCT_DCT = 0, // DCT in both horizontal and vertical
+ ADST_DCT = 1, // ADST in vertical, DCT in horizontal
+ DCT_ADST = 2, // DCT in vertical, ADST in horizontal
+ ADST_ADST = 3, // ADST in both directions
+ TX_TYPES = 4
+} TX_TYPE;
+
+typedef enum {
+ VP9_LAST_FLAG = 1 << 0,
+ VP9_GOLD_FLAG = 1 << 1,
+ VP9_ALT_FLAG = 1 << 2,
+} VP9_REFFRAME;
+
+typedef enum {
+ PLANE_TYPE_Y = 0,
+ PLANE_TYPE_UV = 1,
+ PLANE_TYPES
+} PLANE_TYPE;
+
+typedef enum {
+ DC_PRED, // Average of above and left pixels
+ V_PRED, // Vertical
+ H_PRED, // Horizontal
+ D45_PRED, // Directional 45 deg = round(arctan(1/1) * 180/pi)
+ D135_PRED, // Directional 135 deg = 180 - 45
+ D117_PRED, // Directional 117 deg = 180 - 63
+ D153_PRED, // Directional 153 deg = 180 - 27
+ D207_PRED, // Directional 207 deg = 180 + 27
+ D63_PRED, // Directional 63 deg = round(arctan(2/1) * 180/pi)
+ TM_PRED, // True-motion
+ NEARESTMV,
+ NEARMV,
+ ZEROMV,
+ NEWMV,
+ MB_MODE_COUNT
+} PREDICTION_MODE;
+
+#define INTRA_MODES (TM_PRED + 1)
+
+#define INTER_MODES (1 + NEWMV - NEARESTMV)
+
+#define SKIP_CONTEXTS 3
+#define INTER_MODE_CONTEXTS 7
+
+/* Segment Feature Masks */
+#define MAX_MV_REF_CANDIDATES 2
+
+#define INTRA_INTER_CONTEXTS 4
+#define COMP_INTER_CONTEXTS 5
+#define REF_CONTEXTS 5
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // VP9_COMMON_VP9_ENUMS_H_