/*
 *  Copyright (c) 2015 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 VPX_DSP_VARIANCE_H_
#define VPX_DSP_VARIANCE_H_

#include "./vpx_config.h"

#include "vpx/vpx_integer.h"

#ifdef __cplusplus
extern "C" {
#endif

#define FILTER_BITS 7
#define FILTER_WEIGHT 128

typedef unsigned int (*vpx_sad_fn_t)(const uint8_t *a, int a_stride,
                                     const uint8_t *b, int b_stride);

typedef unsigned int (*vpx_sad_avg_fn_t)(const uint8_t *a, int a_stride,
                                         const uint8_t *b, int b_stride,
                                         const uint8_t *second_pred);

typedef void (*vp8_copy32xn_fn_t)(const uint8_t *a, int a_stride, uint8_t *b,
                                  int b_stride, int n);

typedef void (*vpx_sad_multi_fn_t)(const uint8_t *a, int a_stride,
                                   const uint8_t *b, int b_stride,
                                   unsigned int *sad_array);

typedef void (*vpx_sad_multi_d_fn_t)(const uint8_t *a, int a_stride,
                                     const uint8_t *const b_array[],
                                     int b_stride, unsigned int *sad_array);

typedef unsigned int (*vpx_variance_fn_t)(const uint8_t *a, int a_stride,
                                          const uint8_t *b, int b_stride,
                                          unsigned int *sse);

typedef unsigned int (*vpx_subpixvariance_fn_t)(const uint8_t *a, int a_stride,
                                                int xoffset, int yoffset,
                                                const uint8_t *b, int b_stride,
                                                unsigned int *sse);

typedef unsigned int (*vpx_subp_avg_variance_fn_t)(
    const uint8_t *a, int a_stride, int xoffset, int yoffset, const uint8_t *b,
    int b_stride, unsigned int *sse, const uint8_t *second_pred);

#if CONFIG_VP10 && CONFIG_EXT_INTER
typedef unsigned int (*vpx_masked_sad_fn_t)(const uint8_t *src, int src_stride,
                                            const uint8_t *ref, int ref_stride,
                                            const uint8_t *msk_ptr,
                                            int msk_stride);
typedef unsigned int (*vpx_masked_variance_fn_t)(
    const uint8_t *src, int src_stride, const uint8_t *ref, int ref_stride,
    const uint8_t *msk, int msk_stride, unsigned int *sse);
typedef unsigned int (*vpx_masked_subpixvariance_fn_t)(
    const uint8_t *src, int src_stride, int xoffset, int yoffset,
    const uint8_t *ref, int ref_stride, const uint8_t *msk, int msk_stride,
    unsigned int *sse);
#endif  // CONFIG_VP10 && CONFIG_EXT_INTER

#if CONFIG_VP10 && CONFIG_OBMC
typedef unsigned int (*vpx_obmc_sad_fn_t)(const uint8_t *pred, int pred_stride,
                                          const int32_t *wsrc,
                                          const int32_t *msk);
typedef unsigned int (*vpx_obmc_variance_fn_t)(const uint8_t *pred,
                                               int pred_stride,
                                               const int32_t *wsrc,
                                               const int32_t *msk,
                                               unsigned int *sse);
typedef unsigned int (*vpx_obmc_subpixvariance_fn_t)(
    const uint8_t *pred, int pred_stride, int xoffset, int yoffset,
    const int32_t *wsrc, const int32_t *msk, unsigned int *sse);
#endif  // CONFIG_VP10 && CONFIG_OBMC

#if CONFIG_VP10
typedef struct vpx_variance_vtable {
  vpx_sad_fn_t sdf;
  vpx_sad_avg_fn_t sdaf;
  vpx_variance_fn_t vf;
  vpx_subpixvariance_fn_t svf;
  vpx_subp_avg_variance_fn_t svaf;
  vpx_sad_multi_fn_t sdx3f;
  vpx_sad_multi_fn_t sdx8f;
  vpx_sad_multi_d_fn_t sdx4df;
#if CONFIG_EXT_INTER
  vpx_masked_sad_fn_t msdf;
  vpx_masked_variance_fn_t mvf;
  vpx_masked_subpixvariance_fn_t msvf;
#endif  // CONFIG_EXT_INTER
#if CONFIG_OBMC
  vpx_obmc_sad_fn_t osdf;
  vpx_obmc_variance_fn_t ovf;
  vpx_obmc_subpixvariance_fn_t osvf;
#endif  // CONFIG_OBMC
} vpx_variance_fn_ptr_t;
#endif  // CONFIG_VP10

void vpx_highbd_var_filter_block2d_bil_first_pass(
    const uint8_t *src_ptr8, uint16_t *output_ptr,
    unsigned int src_pixels_per_line, int pixel_step,
    unsigned int output_height, unsigned int output_width,
    const uint8_t *filter);

void vpx_highbd_var_filter_block2d_bil_second_pass(
    const uint16_t *src_ptr, uint16_t *output_ptr,
    unsigned int src_pixels_per_line, unsigned int pixel_step,
    unsigned int output_height, unsigned int output_width,
    const uint8_t *filter);

#ifdef __cplusplus
}  // extern "C"
#endif

#endif  // VPX_DSP_VARIANCE_H_