/*
 * Copyright (c) 2017, 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.
 */

#include <stdlib.h>

#include "config/aom_config.h"
#include "config/aom_dsp_rtcd.h"

#include "aom/aom_integer.h"
#include "aom_ports/mem.h"
#include "aom_dsp/blend.h"

static inline unsigned int masked_sad(const uint8_t *src, int src_stride,
                                      const uint8_t *a, int a_stride,
                                      const uint8_t *b, int b_stride,
                                      const uint8_t *m, int m_stride, int width,
                                      int height) {
  int y, x;
  unsigned int sad = 0;
  for (y = 0; y < height; y++) {
    for (x = 0; x < width; x++) {
      const int16_t pred = AOM_BLEND_A64(m[x], a[x], b[x]);
      sad += abs(pred - src[x]);
    }
    src += src_stride;
    a += a_stride;
    b += b_stride;
    m += m_stride;
  }
  return sad;
}

#define MASKSADMxN(m, n)                                                       \
  unsigned int aom_masked_sad##m##x##n##_c(                                    \
      const uint8_t *src, int src_stride, const uint8_t *ref, int ref_stride,  \
      const uint8_t *second_pred, const uint8_t *msk, int msk_stride,          \
      int invert_mask) {                                                       \
    if (!invert_mask)                                                          \
      return masked_sad(src, src_stride, ref, ref_stride, second_pred, m, msk, \
                        msk_stride, m, n);                                     \
    else                                                                       \
      return masked_sad(src, src_stride, second_pred, m, ref, ref_stride, msk, \
                        msk_stride, m, n);                                     \
  }

/* clang-format off */
MASKSADMxN(128, 128)
MASKSADMxN(128, 64)
MASKSADMxN(64, 128)
MASKSADMxN(64, 64)
MASKSADMxN(64, 32)
MASKSADMxN(32, 64)
MASKSADMxN(32, 32)
MASKSADMxN(32, 16)
MASKSADMxN(16, 32)
MASKSADMxN(16, 16)
MASKSADMxN(16, 8)
MASKSADMxN(8, 16)
MASKSADMxN(8, 8)
MASKSADMxN(8, 4)
MASKSADMxN(4, 8)
MASKSADMxN(4, 4)
#if !CONFIG_REALTIME_ONLY
MASKSADMxN(4, 16)
MASKSADMxN(16, 4)
MASKSADMxN(8, 32)
MASKSADMxN(32, 8)
MASKSADMxN(16, 64)
MASKSADMxN(64, 16)
#endif  // !CONFIG_REALTIME_ONLY
/* clang-format on */

#if CONFIG_AV1_HIGHBITDEPTH
                        static inline unsigned int highbd_masked_sad(
                            const uint8_t *src8, int src_stride,
                            const uint8_t *a8, int a_stride, const uint8_t *b8,
                            int b_stride, const uint8_t *m, int m_stride,
                            int width, int height) {
  int y, x;
  unsigned int sad = 0;
  const uint16_t *src = CONVERT_TO_SHORTPTR(src8);
  const uint16_t *a = CONVERT_TO_SHORTPTR(a8);
  const uint16_t *b = CONVERT_TO_SHORTPTR(b8);

  for (y = 0; y < height; y++) {
    for (x = 0; x < width; x++) {
      const uint16_t pred = AOM_BLEND_A64(m[x], a[x], b[x]);
      sad += abs(pred - src[x]);
    }

    src += src_stride;
    a += a_stride;
    b += b_stride;
    m += m_stride;
  }

  return sad;
}

#define HIGHBD_MASKSADMXN(m, n)                                         \
  unsigned int aom_highbd_masked_sad##m##x##n##_c(                      \
      const uint8_t *src8, int src_stride, const uint8_t *ref8,         \
      int ref_stride, const uint8_t *second_pred8, const uint8_t *msk,  \
      int msk_stride, int invert_mask) {                                \
    if (!invert_mask)                                                   \
      return highbd_masked_sad(src8, src_stride, ref8, ref_stride,      \
                               second_pred8, m, msk, msk_stride, m, n); \
    else                                                                \
      return highbd_masked_sad(src8, src_stride, second_pred8, m, ref8, \
                               ref_stride, msk, msk_stride, m, n);      \
  }

HIGHBD_MASKSADMXN(128, 128)
HIGHBD_MASKSADMXN(128, 64)
HIGHBD_MASKSADMXN(64, 128)
HIGHBD_MASKSADMXN(64, 64)
HIGHBD_MASKSADMXN(64, 32)
HIGHBD_MASKSADMXN(32, 64)
HIGHBD_MASKSADMXN(32, 32)
HIGHBD_MASKSADMXN(32, 16)
HIGHBD_MASKSADMXN(16, 32)
HIGHBD_MASKSADMXN(16, 16)
HIGHBD_MASKSADMXN(16, 8)
HIGHBD_MASKSADMXN(8, 16)
HIGHBD_MASKSADMXN(8, 8)
HIGHBD_MASKSADMXN(8, 4)
HIGHBD_MASKSADMXN(4, 8)
HIGHBD_MASKSADMXN(4, 4)
#if !CONFIG_REALTIME_ONLY
HIGHBD_MASKSADMXN(4, 16)
HIGHBD_MASKSADMXN(16, 4)
HIGHBD_MASKSADMXN(8, 32)
HIGHBD_MASKSADMXN(32, 8)
HIGHBD_MASKSADMXN(16, 64)
HIGHBD_MASKSADMXN(64, 16)
#endif  // !CONFIG_REALTIME_ONLY
#endif  // CONFIG_AV1_HIGHBITDEPTH

#if !CONFIG_REALTIME_ONLY
// pre: predictor being evaluated
// wsrc: target weighted prediction (has been *4096 to keep precision)
// mask: 2d weights (scaled by 4096)
static inline unsigned int obmc_sad(const uint8_t *pre, int pre_stride,
                                    const int32_t *wsrc, const int32_t *mask,
                                    int width, int height) {
  int y, x;
  unsigned int sad = 0;

  for (y = 0; y < height; y++) {
    for (x = 0; x < width; x++)
      sad += ROUND_POWER_OF_TWO(abs(wsrc[x] - pre[x] * mask[x]), 12);

    pre += pre_stride;
    wsrc += width;
    mask += width;
  }

  return sad;
}

#define OBMCSADMxN(m, n)                                                     \
  unsigned int aom_obmc_sad##m##x##n##_c(const uint8_t *ref, int ref_stride, \
                                         const int32_t *wsrc,                \
                                         const int32_t *mask) {              \
    return obmc_sad(ref, ref_stride, wsrc, mask, m, n);                      \
  }

/* clang-format off */
OBMCSADMxN(128, 128)
OBMCSADMxN(128, 64)
OBMCSADMxN(64, 128)
OBMCSADMxN(64, 64)
OBMCSADMxN(64, 32)
OBMCSADMxN(32, 64)
OBMCSADMxN(32, 32)
OBMCSADMxN(32, 16)
OBMCSADMxN(16, 32)
OBMCSADMxN(16, 16)
OBMCSADMxN(16, 8)
OBMCSADMxN(8, 16)
OBMCSADMxN(8, 8)
OBMCSADMxN(8, 4)
OBMCSADMxN(4, 8)
OBMCSADMxN(4, 4)
OBMCSADMxN(4, 16)
OBMCSADMxN(16, 4)
OBMCSADMxN(8, 32)
OBMCSADMxN(32, 8)
OBMCSADMxN(16, 64)
OBMCSADMxN(64, 16)
/* clang-format on */

#if CONFIG_AV1_HIGHBITDEPTH
                            static inline unsigned int highbd_obmc_sad(
                                const uint8_t *pre8, int pre_stride,
                                const int32_t *wsrc, const int32_t *mask,
                                int width, int height) {
  int y, x;
  unsigned int sad = 0;
  const uint16_t *pre = CONVERT_TO_SHORTPTR(pre8);

  for (y = 0; y < height; y++) {
    for (x = 0; x < width; x++)
      sad += ROUND_POWER_OF_TWO(abs(wsrc[x] - pre[x] * mask[x]), 12);

    pre += pre_stride;
    wsrc += width;
    mask += width;
  }

  return sad;
}

#define HIGHBD_OBMCSADMXN(m, n)                                \
  unsigned int aom_highbd_obmc_sad##m##x##n##_c(               \
      const uint8_t *ref, int ref_stride, const int32_t *wsrc, \
      const int32_t *mask) {                                   \
    return highbd_obmc_sad(ref, ref_stride, wsrc, mask, m, n); \
  }

/* clang-format off */
HIGHBD_OBMCSADMXN(128, 128)
HIGHBD_OBMCSADMXN(128, 64)
HIGHBD_OBMCSADMXN(64, 128)
HIGHBD_OBMCSADMXN(64, 64)
HIGHBD_OBMCSADMXN(64, 32)
HIGHBD_OBMCSADMXN(32, 64)
HIGHBD_OBMCSADMXN(32, 32)
HIGHBD_OBMCSADMXN(32, 16)
HIGHBD_OBMCSADMXN(16, 32)
HIGHBD_OBMCSADMXN(16, 16)
HIGHBD_OBMCSADMXN(16, 8)
HIGHBD_OBMCSADMXN(8, 16)
HIGHBD_OBMCSADMXN(8, 8)
HIGHBD_OBMCSADMXN(8, 4)
HIGHBD_OBMCSADMXN(4, 8)
HIGHBD_OBMCSADMXN(4, 4)
HIGHBD_OBMCSADMXN(4, 16)
HIGHBD_OBMCSADMXN(16, 4)
HIGHBD_OBMCSADMXN(8, 32)
HIGHBD_OBMCSADMXN(32, 8)
HIGHBD_OBMCSADMXN(16, 64)
HIGHBD_OBMCSADMXN(64, 16)
/* clang-format on */
#endif  // CONFIG_AV1_HIGHBITDEPTH
#endif  // !CONFIG_REALTIME_ONLY