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diff --git a/third_party/aom/aom_dsp/grain_synthesis.h b/third_party/aom/aom_dsp/grain_synthesis.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.
+ */
+
+/*!\file
+ * \brief Describes film grain parameters and film grain synthesis
+ *
+ */
+#ifndef AOM_AOM_DSP_GRAIN_SYNTHESIS_H_
+#define AOM_AOM_DSP_GRAIN_SYNTHESIS_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "aom_dsp/aom_dsp_common.h"
+#include "aom/aom_image.h"
+
+/*!\brief Structure containing film grain synthesis parameters for a frame
+ *
+ * This structure contains input parameters for film grain synthesis
+ */
+typedef struct {
+  int apply_grain;
+
+  int update_parameters;
+
+  // 8 bit values
+  int scaling_points_y[14][2];
+  int num_y_points;  // value: 0..14
+
+  // 8 bit values
+  int scaling_points_cb[10][2];
+  int num_cb_points;  // value: 0..10
+
+  // 8 bit values
+  int scaling_points_cr[10][2];
+  int num_cr_points;  // value: 0..10
+
+  int scaling_shift;  // values : 8..11
+
+  int ar_coeff_lag;  // values:  0..3
+
+  // 8 bit values
+  int ar_coeffs_y[24];
+  int ar_coeffs_cb[25];
+  int ar_coeffs_cr[25];
+
+  // Shift value: AR coeffs range
+  // 6: [-2, 2)
+  // 7: [-1, 1)
+  // 8: [-0.5, 0.5)
+  // 9: [-0.25, 0.25)
+  int ar_coeff_shift;  // values : 6..9
+
+  int cb_mult;       // 8 bits
+  int cb_luma_mult;  // 8 bits
+  int cb_offset;     // 9 bits
+
+  int cr_mult;       // 8 bits
+  int cr_luma_mult;  // 8 bits
+  int cr_offset;     // 9 bits
+
+  int overlap_flag;
+
+  int clip_to_restricted_range;
+
+  unsigned int bit_depth;  // video bit depth
+
+  int chroma_scaling_from_luma;
+
+  int grain_scale_shift;
+
+  uint16_t random_seed;
+} aom_film_grain_t;
+
+/*!\brief Add film grain
+ *
+ * Add film grain to an image
+ *
+ * Returns 0 for success, -1 for failure
+ *
+ * \param[in]    grain_params     Grain parameters
+ * \param[in]    luma             luma plane
+ * \param[in]    cb               cb plane
+ * \param[in]    cr               cr plane
+ * \param[in]    height           luma plane height
+ * \param[in]    width            luma plane width
+ * \param[in]    luma_stride      luma plane stride
+ * \param[in]    chroma_stride    chroma plane stride
+ */
+int av1_add_film_grain_run(const aom_film_grain_t *grain_params, uint8_t *luma,
+                           uint8_t *cb, uint8_t *cr, int height, int width,
+                           int luma_stride, int chroma_stride,
+                           int use_high_bit_depth, int chroma_subsamp_y,
+                           int chroma_subsamp_x, int mc_identity);
+
+/*!\brief Add film grain
+ *
+ * Add film grain to an image
+ *
+ * Returns 0 for success, -1 for failure
+ *
+ * \param[in]    grain_params     Grain parameters
+ * \param[in]    src              Source image
+ * \param[out]   dst              Resulting image with grain
+ */
+int av1_add_film_grain(const aom_film_grain_t *grain_params,
+                       const aom_image_t *src, aom_image_t *dst);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // AOM_AOM_DSP_GRAIN_SYNTHESIS_H_