/*
 * Copyright (c) 2021, Alliance for Open Media. All rights reserved
 *
 * This source code is subject to the terms of the BSD 3-Clause Clear License
 * and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
 * License was not distributed with this source code in the LICENSE file, you
 * can obtain it at aomedia.org/license/software-license/bsd-3-c-c/.  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
 * aomedia.org/license/patent-license/.
 */

#ifndef AOM_AV1_COMMON_RESTORATION_H_
#define AOM_AV1_COMMON_RESTORATION_H_

#include "aom_ports/mem.h"
#include "config/aom_config.h"

#include "av1/common/blockd.h"
#include "av1/common/enums.h"

#include "third_party/vector/vector.h"

#ifdef __cplusplus
extern "C" {
#endif

/*! @file */

/*!\cond */

#define ISSUE_253 \
  1  // enable virtual line buffer for cross-component wienerNS filter

// Border for Loop restoration buffer
#define AOM_RESTORATION_FRAME_BORDER 32
#define CLIP(x, lo, hi) ((x) < (lo) ? (lo) : (x) > (hi) ? (hi) : (x))
#define RINT(x) ((x) < 0 ? (int)((x)-0.5) : (int)((x) + 0.5))

#define RESTORATION_PROC_UNIT_SIZE 64

// Filter tile grid offset upwards compared to the superblock grid
#define RESTORATION_UNIT_OFFSET 8

#define SGRPROJ_BORDER_VERT 3  // Vertical border used for Sgr
#define SGRPROJ_BORDER_HORZ 3  // Horizontal border used for Sgr

#define WIENER_BORDER_VERT 2  // Vertical border used for Wiener
#define WIENER_HALFWIN 3
#define WIENER_BORDER_HORZ (WIENER_HALFWIN)  // Horizontal border for Wiener

// RESTORATION_BORDER_VERT determines line buffer requirement for LR.
// Should be set at the max of SGRPROJ_BORDER_VERT and WIENER_BORDER_VERT.
// Note the line buffer needed is twice the value of this macro.
#if SGRPROJ_BORDER_VERT >= WIENER_BORDER_VERT
#define RESTORATION_BORDER_VERT (SGRPROJ_BORDER_VERT)
#else
#define RESTORATION_BORDER_VERT (WIENER_BORDER_VERT)
#endif  // SGRPROJ_BORDER_VERT >= WIENER_BORDER_VERT

#if SGRPROJ_BORDER_HORZ >= WIENER_BORDER_HORZ
#define RESTORATION_BORDER_HORZ (SGRPROJ_BORDER_HORZ)
#else
#define RESTORATION_BORDER_HORZ (WIENER_BORDER_HORZ)
#endif  // SGRPROJ_BORDER_VERT >= WIENER_BORDER_VERT

// How many border pixels do we need for each processing unit?
#if ISSUE_253
#define RESTORATION_BORDER \
  4  // 4 rows/columns are needed for only cross-component wienerns filter,
#else
#define RESTORATION_BORDER 3
#endif  // ISSUE_253

// How many rows of deblocked pixels do we save above/below each processing
// stripe?
#define RESTORATION_CTX_VERT 2

// Additional pixels to the left and right in above/below buffers
// It is RESTORATION_BORDER_HORZ rounded up to get nicer buffer alignment
#define RESTORATION_EXTRA_HORZ 4

// Pad up to 20 more (may be much less is needed)
#define RESTORATION_PADDING 20
#define RESTORATION_PROC_UNIT_PELS                             \
  ((RESTORATION_PROC_UNIT_SIZE + RESTORATION_BORDER_HORZ * 2 + \
    RESTORATION_PADDING) *                                     \
   (RESTORATION_PROC_UNIT_SIZE + RESTORATION_BORDER_VERT * 2 + \
    RESTORATION_PADDING))

#define RESTORATION_UNITSIZE_MAX 512
#define NUM_PC_WIENER_TAPS_LUMA 13
#include "av1/common/pc_wiener_filters.h"

// Maximum number of filter-taps in LR non-separable filtering.
#define MAX_NUM_DICTIONARY_TAPS 28

#define RESTORATION_UNITPELS_HORZ_MAX \
  (RESTORATION_UNITSIZE_MAX * 3 / 2 + 2 * RESTORATION_BORDER_HORZ + 16)
#define RESTORATION_UNITPELS_VERT_MAX                                \
  ((RESTORATION_UNITSIZE_MAX * 3 / 2 + 2 * RESTORATION_BORDER_VERT + \
    RESTORATION_UNIT_OFFSET))
#define RESTORATION_UNITPELS_MAX \
  (RESTORATION_UNITPELS_HORZ_MAX * RESTORATION_UNITPELS_VERT_MAX)

// Two 32-bit buffers needed for the restored versions from two filters
// TODO(debargha, rupert): Refactor to not need the large tilesize to be stored
// on the decoder side.
#define SGRPROJ_TMPBUF_SIZE (RESTORATION_UNITPELS_MAX * 2 * sizeof(int32_t))

#define SGRPROJ_EXTBUF_SIZE (0)
#define SGRPROJ_PARAMS_BITS 4
#define SGRPROJ_PARAMS (1 << SGRPROJ_PARAMS_BITS)
#define SGRPROJ_PARAMS_DEFAULT 9

// Precision bits for projection
#define SGRPROJ_PRJ_BITS 7
// Restoration precision bits generated higher than source before projection
#define SGRPROJ_RST_BITS 4
// Internal precision bits for core selfguided_restoration
#define SGRPROJ_SGR_BITS 8
#define SGRPROJ_SGR (1 << SGRPROJ_SGR_BITS)

#define SGRPROJ_PRJ_MIN0 (-(1 << SGRPROJ_PRJ_BITS) * 3 / 4)
#define SGRPROJ_PRJ_MAX0 (SGRPROJ_PRJ_MIN0 + (1 << SGRPROJ_PRJ_BITS) - 1)
#define SGRPROJ_PRJ_MIN1 (-(1 << SGRPROJ_PRJ_BITS) / 4)
#define SGRPROJ_PRJ_MAX1 (SGRPROJ_PRJ_MIN1 + (1 << SGRPROJ_PRJ_BITS) - 1)

#define SGRPROJ_PRJ_SUBEXP_K 4

#define SGRPROJ_BITS (SGRPROJ_PRJ_BITS * 2 + SGRPROJ_PARAMS_BITS)

#define MAX_RADIUS 2  // Only 1, 2, 3 allowed
#define MAX_NELEM ((2 * MAX_RADIUS + 1) * (2 * MAX_RADIUS + 1))
#define SGRPROJ_MTABLE_BITS 20
#define SGRPROJ_RECIP_BITS 12

#define WIENER_HALFWIN1 (WIENER_HALFWIN + 1)
#define WIENER_WIN (2 * WIENER_HALFWIN + 1)
#define WIENER_WIN2 ((WIENER_WIN) * (WIENER_WIN))
#define WIENER_TMPBUF_SIZE (0)
#define WIENER_EXTBUF_SIZE (0)

// If WIENER_WIN_CHROMA == WIENER_WIN - 2, that implies 5x5 filters are used for
// chroma. To use 7x7 for chroma set WIENER_WIN_CHROMA to WIENER_WIN.
#define WIENER_WIN_CHROMA (WIENER_WIN - 2)
#define WIENER_WIN_REDUCED (WIENER_WIN - 2)
#define WIENER_WIN2_CHROMA ((WIENER_WIN_CHROMA) * (WIENER_WIN_CHROMA))

#define WIENER_FILT_PREC_BITS 7
#define WIENER_FILT_STEP (1 << WIENER_FILT_PREC_BITS)

// Central values for the taps
#define WIENER_FILT_TAP0_MIDV (3)
#define WIENER_FILT_TAP1_MIDV (-7)
#define WIENER_FILT_TAP2_MIDV (15)
#define WIENER_FILT_TAP3_MIDV                                              \
  (WIENER_FILT_STEP - 2 * (WIENER_FILT_TAP0_MIDV + WIENER_FILT_TAP1_MIDV + \
                           WIENER_FILT_TAP2_MIDV))

#define WIENER_FILT_TAP0_BITS 4
#define WIENER_FILT_TAP1_BITS 5
#define WIENER_FILT_TAP2_BITS 6

#define WIENER_FILT_BITS \
  ((WIENER_FILT_TAP0_BITS + WIENER_FILT_TAP1_BITS + WIENER_FILT_TAP2_BITS) * 2)

#define WIENER_FILT_TAP0_MINV \
  (WIENER_FILT_TAP0_MIDV - (1 << WIENER_FILT_TAP0_BITS) / 2)
#define WIENER_FILT_TAP1_MINV \
  (WIENER_FILT_TAP1_MIDV - (1 << WIENER_FILT_TAP1_BITS) / 2)
#define WIENER_FILT_TAP2_MINV \
  (WIENER_FILT_TAP2_MIDV - (1 << WIENER_FILT_TAP2_BITS) / 2)

#define WIENER_FILT_TAP0_MAXV \
  (WIENER_FILT_TAP0_MIDV - 1 + (1 << WIENER_FILT_TAP0_BITS) / 2)
#define WIENER_FILT_TAP1_MAXV \
  (WIENER_FILT_TAP1_MIDV - 1 + (1 << WIENER_FILT_TAP1_BITS) / 2)
#define WIENER_FILT_TAP2_MAXV \
  (WIENER_FILT_TAP2_MIDV - 1 + (1 << WIENER_FILT_TAP2_BITS) / 2)

#define WIENER_FILT_TAP0_SUBEXP_K 1
#define WIENER_FILT_TAP1_SUBEXP_K 2
#define WIENER_FILT_TAP2_SUBEXP_K 3

#define WIENERNS_UV_BRD 2  // Max offset for luma used for chorma

#define WIENERNS_ROW_ID 0
#define WIENERNS_COL_ID 1
#define WIENERNS_BUF_POS 2

#define WIENERNS_COEFCFG_LEN 3
#define WIENERNS_BIT_ID 0
#define WIENERNS_MIN_ID 1
#define WIENERNS_PAR_ID 2

#define MAX_WIENERNS_SUBSETS 8

typedef struct {
  NonsepFilterConfig nsfilter_config;
  int ncoeffs;
  const int (*coeffs)[WIENERNS_COEFCFG_LEN];
  int nsubsets;
  const int (*subset_config)[WIENERNS_TAPS_MAX];
} WienernsFilterParameters;

extern const WienernsFilterParameters wienerns_filter_y;
extern const WienernsFilterParameters wienerns_filter_uv;

extern const int wienerns_simd_config_y[25][3];
#if CONFIG_WIENERNS_9x9
extern const int wienerns_simd_large_config_y[33][3];
#endif  // CONFIG_WIENERNS_9x9
extern const int wienerns_simd_config_uv_from_uv[13][3];
extern const int wienerns_simd_config_uv_from_y[13][3];
extern const int wienerns_simd_subtract_center_config_y[24][3];
extern const int wienerns_simd_subtract_center_config_uv_from_uv[12][3];
extern const int wienerns_simd_subtract_center_config_uv_from_y[12][3];
extern const int wienerns_simd_config_uv_from_uvonly[13][3];

static INLINE const WienernsFilterParameters *get_wienerns_parameters(
    int qindex, int is_uv) {
  (void)qindex;
  return is_uv ? &wienerns_filter_uv : &wienerns_filter_y;
}

static INLINE const NonsepFilterConfig *get_wienerns_config(int qindex,
                                                            int is_uv) {
  const WienernsFilterParameters *base_nsfilter_params =
      get_wienerns_parameters(qindex, is_uv);
  return &base_nsfilter_params->nsfilter_config;
}

#if CONFIG_COMBINE_PC_NS_WIENER
#ifndef NDEBUG
static inline void print_filters(
    int plane, const WienernsFilterParameters *nsfilter_params,
    const WienerNonsepInfo *wienerns_info, char enc_dec, int pm) {
  for (int c_id = 0; c_id < wienerns_info->num_classes; ++c_id) {
    const int16_t *wienerns_info_nsfilter =
        const_nsfilter_taps(wienerns_info, c_id);
    printf("%c[%1d, %2d] %2d: ", enc_dec, plane, wienerns_info->num_classes,
           c_id);
    for (int i = 0; i < nsfilter_params->ncoeffs; ++i) {
      if (pm) {
        printf("%3d (%2d),", wienerns_info_nsfilter[i],
               wienerns_info->match_indices[i]);
      } else {
        printf("%3d,", wienerns_info_nsfilter[i]);
      }
    }
    printf(" [%2d]\n", wienerns_info->num_ref_filters);
  }
}
#endif
static inline int is_frame_filters_enabled(int plane) {
#if CONFIG_COMBINE_PC_NS_WIENER_ADD
  (void)plane;
  return 1;
#else
  return plane == AOM_PLANE_Y;
#endif  // CONFIG_COMBINE_PC_NS_WIENER_ADD
}

// Returns the alternate plane whose reference-frame-filters can be used to
// augment those for plane.
static inline int alternate_ref_plane(int plane) {
  switch (plane) {
    case AOM_PLANE_Y: return -1;
    case AOM_PLANE_U: return AOM_PLANE_V;
    case AOM_PLANE_V: return AOM_PLANE_U;
    default: assert(0); return -1;
  }
}

static inline int max_num_classes(int plane) {
  return (plane == AOM_PLANE_Y) ? NUM_WIENERNS_CLASS_INIT_LUMA
                                : NUM_WIENERNS_CLASS_INIT_CHROMA;
}

static inline int default_num_classes(int plane) {
  return max_num_classes(plane);
}

const uint8_t *get_pc_wiener_sub_classifier(int num_classes, int set_index);

// TODO(any): This function is deprecated and can be removed
int wienerns_to_pcwiener_tap_config_translator(
    const NonsepFilterConfig *nsfilter_config, int *tap_translator,
    int max_num_taps);

void fill_filter_with_match(WienerNonsepInfo *filter,
                            const int16_t *frame_filter_dictionary,
                            int dict_stride, const int *match_indices,
                            const WienernsFilterParameters *nsfilter_params,
                            int class_id, int nopcw);
void fill_first_slot_of_bank_with_filter_match(
    int plane, WienerNonsepInfoBank *bank, const WienerNonsepInfo *reference,
    const int *match_indices, int base_qindex, int class_id,
    int16_t *frame_filter_dictionary, int dict_stride, int nopcw);

#define ILLEGAL_MATCH -1

static INLINE int get_first_match_index(int compound_match_index,
                                        int num_classes, int nopcw) {
  assert(num_classes >= 1 && num_classes <= WIENERNS_MAX_CLASSES);
  return compound_match_index &
         ((1 << num_frame_first_predictor_bits[nopcw][num_classes]) - 1);
}

static INLINE int first_match_bits(int num_classes, int nopcw) {
  assert(num_classes >= 1 && num_classes <= WIENERNS_MAX_CLASSES);
  return num_frame_first_predictor_bits[nopcw][num_classes];
}

static INLINE int encode_first_match(int compound_match_index, int *num_bits,
                                     int num_classes, int nopcw) {
  assert(num_classes >= 1 && num_classes <= WIENERNS_MAX_CLASSES);
  *num_bits = first_match_bits(num_classes, nopcw);
  return get_first_match_index(compound_match_index, num_classes, nopcw);
}

static INLINE int decode_first_match(int encoded_match_index) {
  return encoded_match_index;
}

#if !CONFIG_COMBINE_PC_NS_WIENER_ADD
static INLINE int count_match_indices_bits(int num_classes, int nopcw) {
  assert(num_classes >= 1 && num_classes <= WIENERNS_MAX_CLASSES);
  int total_bits = 0;

  for (int c_id = 0; c_id < num_classes; ++c_id) {
    total_bits += first_match_bits(num_classes, nopcw);
  }
  return total_bits;
}
#endif  // !CONFIG_COMBINE_PC_NS_WIENER_ADD
#endif  // CONFIG_COMBINE_PC_NS_WIENER

// Max of SGRPROJ_TMPBUF_SIZE, DOMAINTXFMRF_TMPBUF_SIZE, WIENER_TMPBUF_SIZE
#define RESTORATION_TMPBUF_SIZE (SGRPROJ_TMPBUF_SIZE)

// Max of SGRPROJ_EXTBUF_SIZE, WIENER_EXTBUF_SIZE
#define RESTORATION_EXTBUF_SIZE (WIENER_EXTBUF_SIZE)

// Check the assumptions of the existing code
#if SUBPEL_TAPS != WIENER_WIN + 1
#error "Wiener filter currently only works if SUBPEL_TAPS == WIENER_WIN + 1"
#endif
#if WIENER_FILT_PREC_BITS != 7
#error "Wiener filter currently only works if WIENER_FILT_PREC_BITS == 7"
#endif

#define LR_TILE_ROW 0
#define LR_TILE_COL 0
#define LR_TILE_COLS 1

typedef struct {
  int r[2];  // radii
  int s[2];  // sgr parameters for r[0] and r[1], based on GenSgrprojVtable()
} sgr_params_type;
/*!\endcond */

/*!\brief Parameters related to Restoration Unit Info */
typedef struct {
  /*!
   * restoration type
   */
  RestorationType restoration_type;

  /*!
   * Wiener filter parameters if restoration_type indicates Wiener
   */
  WienerInfo wiener_info;

  /*!
   * Sgrproj filter parameters if restoration_type indicates Sgrproj
   */
  SgrprojInfo sgrproj_info;
  /*!
   * Nonseparable Wiener filter information.
   */
  WienerNonsepInfo wienerns_info;
  /*!
   * Pointer to luma frame.
   */
  const uint16_t *luma;
  /*!
   * Stride for luma frame.
   */
  int luma_stride;

  /*!
   * Plane for filtering.
   */
  int plane;
  /*!
   * Quantizer index.
   */
  int base_qindex;
  /*!
   * The class-id that classifcation related processing should be restricted to.
   */
  int wiener_class_id_restrict;
  /*!
   * Pointer to tskip frame.
   */
  const uint8_t *tskip;
  /*!
   * Stride for tskip frame.
   */
  int tskip_stride;
  /*!
   * Offset to quantizer index.
   */
  int qindex_offset;
  /*!
   * Pointer to wiener_class_id frame.
   */
  uint8_t *wiener_class_id;
  /*!
   * Stride for wiener_class_id frame.
   */
  int wiener_class_id_stride;
  /*!
   * Pointer to buffers for pcwiener computations.
   */
  PcwienerBuffers *pcwiener_buffers;
  /*!
   * flag to skip accumulating txskip values
   */
  bool tskip_zero_flag;
#if CONFIG_COMBINE_PC_NS_WIENER
  /*!
   * Whether classification needs to be computed.
   */
  int compute_classification;
  /*!
   * Whether filtering with pre-trained filters should be skipped.
   */
  int skip_pcwiener_filtering;
#endif  // CONFIG_COMBINE_PC_NS_WIENER
#if CONFIG_BRU
  /*!\cond */
  MB_MODE_INFO **mbmi_ptr;
  int mi_stride;
  int ss_x;
  int ss_y;
  struct aom_internal_error_info *error;
  /*!\endcond */
#endif  // CONFIG_BRU
} RestorationUnitInfo;

/*!\cond */

// A restoration line buffer needs space for two lines plus a horizontal filter
// margin of RESTORATION_EXTRA_HORZ on each side.
#if ISSUE_253
// The maximum picture width is 8192 * 8 for LR to work properly in this
// software implementation. This is one quick implementation, the buffer size
// should be allocated based on picture width
#define MAX_SUPPORTED_PIC_WIDTH_IN_CCALF_IMP (8192 * 8)
#define RESTORATION_LINEBUFFER_WIDTH \
  (MAX_SUPPORTED_PIC_WIDTH_IN_CCALF_IMP * 3 / 2 + 2 * RESTORATION_EXTRA_HORZ)
#else
#define RESTORATION_LINEBUFFER_WIDTH \
  (RESTORATION_UNITSIZE_MAX * 3 / 2 + 2 * RESTORATION_EXTRA_HORZ)
#endif  // ISSUE_253

// Similarly, the column buffers (used when we're at a vertical tile edge
// that we can't filter across) need space for one processing unit's worth
// of pixels, plus the top/bottom border width
#define RESTORATION_COLBUFFER_HEIGHT \
  (RESTORATION_PROC_UNIT_SIZE + 2 * RESTORATION_BORDER)

typedef struct {
  // Temporary buffers to save/restore 3 lines above/below the restoration
  // stripe.
#if ISSUE_253
  uint16_t tmp_save_above[2][RESTORATION_BORDER][RESTORATION_LINEBUFFER_WIDTH];
  uint16_t tmp_save_below[2][RESTORATION_BORDER][RESTORATION_LINEBUFFER_WIDTH];
#else
  uint16_t tmp_save_above[RESTORATION_BORDER][RESTORATION_LINEBUFFER_WIDTH];
  uint16_t tmp_save_below[RESTORATION_BORDER][RESTORATION_LINEBUFFER_WIDTH];
#endif  // ISSUE_253
} RestorationLineBuffers;
/*!\endcond */

/*!\brief Parameters related to Restoration Stripe boundaries */
typedef struct {
  /*!
   * stripe boundary above
   */
  uint16_t *stripe_boundary_above;

  /*!
   * stripe boundary below
   */
  uint16_t *stripe_boundary_below;

  /*!
   * strides for stripe boundaries above and below
   */
  int stripe_boundary_stride;

  /*!
   * size of stripe boundaries above and below
   */
  int stripe_boundary_size;
} RestorationStripeBoundaries;

/*!\brief Parameters related to Restoration Info */
typedef struct {
  /*!
   * Restoration type for frame
   */
  RestorationType frame_restoration_type;

  /*!
   * Restoration unit size
   */
  int restoration_unit_size;

  /*!
   * Maximum restoration unit size
   */
  int max_restoration_unit_size;
  /*!
   * Minimum restoration unit size
   */
  int min_restoration_unit_size;
  /**
   * \name Fields allocated and initialised by av1_alloc_restoration_struct.
   * (horz_)units_per_tile give the number of restoration units in
   * (one row of) the largest tile in the frame.
   */
  /**@{*/
  /*!
   * Number of units per tile for the largest tile in the frame
   */
  int units_per_tile;

  /*!
   * Number of vertical units per tile
   */
  int vert_units_per_tile;

  /*!
   * Number of horizontal units per tile for the largest tile in the frame
   */
  int horz_units_per_tile;
  /**@}*/

  /*!
   * List of info for units in tile.
   * The data in unit_info is laid out with units_per_tile entries for each
   * tile, which have stride horz_units_per_tile.
   * Even if there are tiles of different sizes, the data in unit_info is
   * laid out as if all tiles are of full size.
   */
  RestorationUnitInfo *unit_info;

  /*!
   * Restoration Stripe boundary info
   */
  RestorationStripeBoundaries boundaries;

  /*!
   * Whether optimized lr can be used for speed.
   * That includes cases of no cdef and no superres, or if fast trial runs
   * are used on the encoder side.
   */
  int optimized_lr;
  /*!
   * Additional tools disable mask in switchable frame mode
   */
  uint8_t sw_lr_tools_disable_mask;
  /*!
   * Number of classes in the Wienerns filtering calculation.
   */
  int num_filter_classes;
  /*!
   * Whether frame-level filters are on or off.
   */
  int frame_filters_on;
  /*!
   * Frame-level filter taps.
   */
  WienerNonsepInfo frame_filters;
  /*!
   * Whether frame-level filters are initialized.
   */
  int frame_filters_initialized;
#if CONFIG_TEMP_LR
  /*!
   * whether frame filter is predicted from a reference picture
   */
  uint8_t temporal_pred_flag;
  /*!
   * reference picture index for frame level filter prediction
   */
  uint8_t rst_ref_pic_idx;
#endif  // CONFIG_TEMP_LR
} RestorationInfo;

/*!\cond */

static INLINE void set_default_sgrproj(SgrprojInfo *sgrproj_info) {
  sgrproj_info->ep = SGRPROJ_PARAMS_DEFAULT;
  sgrproj_info->xqd[0] = (SGRPROJ_PRJ_MIN0 + SGRPROJ_PRJ_MAX0) / 2;
  sgrproj_info->xqd[1] = (SGRPROJ_PRJ_MIN1 + SGRPROJ_PRJ_MAX1) / 2;
}

static INLINE void set_default_wiener(WienerInfo *wiener_info, int chroma) {
  const int wiener_filt_tap0_midv = chroma ? 0 : WIENER_FILT_TAP0_MIDV;
  wiener_info->vfilter[0] = wiener_info->hfilter[0] = wiener_filt_tap0_midv;
  wiener_info->vfilter[1] = wiener_info->hfilter[1] = WIENER_FILT_TAP1_MIDV;
  wiener_info->vfilter[2] = wiener_info->hfilter[2] = WIENER_FILT_TAP2_MIDV;
  wiener_info->vfilter[WIENER_HALFWIN] = wiener_info->hfilter[WIENER_HALFWIN] =
      -2 *
      (WIENER_FILT_TAP2_MIDV + WIENER_FILT_TAP1_MIDV + wiener_filt_tap0_midv);
  wiener_info->vfilter[4] = wiener_info->hfilter[4] = WIENER_FILT_TAP2_MIDV;
  wiener_info->vfilter[5] = wiener_info->hfilter[5] = WIENER_FILT_TAP1_MIDV;
  wiener_info->vfilter[6] = wiener_info->hfilter[6] = wiener_filt_tap0_midv;
}

// Clips scale_x to allowed range of Wienerns filter taps.
static INLINE int16_t clip_to_wienerns_range(int16_t scale_x, int16_t minv,
                                             int16_t n) {
  scale_x = AOMMAX(scale_x, minv);
  scale_x = AOMMIN(scale_x, minv + n - 1);
  return (int16_t)scale_x;
}

static INLINE void set_default_wienerns(WienerNonsepInfo *wienerns_info,
                                        int qindex, int num_classes,
                                        int chroma) {
  const WienernsFilterParameters *nsfilter_params =
      get_wienerns_parameters(qindex, chroma);
  wienerns_info->num_classes = num_classes;
  for (int c_id = 0; c_id < wienerns_info->num_classes; ++c_id) {
    wienerns_info->bank_ref_for_class[c_id] = 0;
    int16_t *wienerns_info_nsfilter = nsfilter_taps(wienerns_info, c_id);
    for (int i = 0; i < nsfilter_params->ncoeffs; ++i) {
      wienerns_info_nsfilter[i] =
          nsfilter_params->coeffs[i][WIENERNS_MIN_ID] +
          (1 << nsfilter_params->coeffs[i][WIENERNS_BIT_ID]) / 2;
    }
  }
}

static INLINE void set_default_wienerns_fromparams(
    WienerNonsepInfo *wienerns_info, int num_classes,
    const WienernsFilterParameters *nsfilter_params) {
  wienerns_info->num_classes = num_classes;
  for (int c_id = 0; c_id < wienerns_info->num_classes; ++c_id) {
    wienerns_info->bank_ref_for_class[c_id] = 0;
    int16_t *wienerns_info_nsfilter = nsfilter_taps(wienerns_info, c_id);
    for (int i = 0; i < nsfilter_params->ncoeffs; ++i) {
      wienerns_info_nsfilter[i] =
          nsfilter_params->coeffs[i][WIENERNS_MIN_ID] +
          (1 << nsfilter_params->coeffs[i][WIENERNS_BIT_ID]) / 2;
    }
  }
}

// 0: Skip luma pixels to scale down to chroma (simplest)
// 1: Average 4 or 2 luma pixels to scale down to chroma
// 2: Average 2 (top and down) luma pixels to scale down to chroma for 420,
// could be based on the luma downsampling type from CFL tool 3: Use 8-tap
// downsampling filter
#define WIENERNS_CROSS_FILT_LUMA_TYPE 2

uint16_t *wienerns_copy_luma_highbd(const uint16_t *dgd, int height_y,
                                    int width_y, int in_stride, uint16_t **luma,
                                    int height_uv, int width_uv, int border,
                                    int out_stride, int bd
#if WIENERNS_CROSS_FILT_LUMA_TYPE == 2
                                    ,
                                    int ds_type
#endif
);

typedef struct {
  int h_start, h_end, v_start, v_end;
} RestorationTileLimits;

typedef void (*rest_unit_visitor_t)(const RestorationTileLimits *limits,
                                    const AV1PixelRect *tile_rect,
                                    int rest_unit_idx, int rest_unit_idx_seq,
                                    void *priv, int32_t *tmpbuf,
                                    RestorationLineBuffers *rlbs);

typedef struct FilterFrameCtxt {
  const RestorationInfo *rsi;
  int tile_stripe0;
  int ss_x, ss_y;
  int bit_depth;
  uint16_t *data8, *dst8;
  int data_stride, dst_stride;
  AV1PixelRect tile_rect;
  int plane;
  int base_qindex;
  const uint16_t *luma;
  int luma_stride;
  const uint8_t *tskip;
  int tskip_stride;
  int qindex_offset;
  uint8_t *wiener_class_id;
  int wiener_class_id_stride;
  bool tskip_zero_flag;
#if CONFIG_BRU
  const struct CommonModeInfoParams *mi_params;
  int order_hint;
  struct aom_internal_error_info *error;
#endif  // CONFIG_BRU
} FilterFrameCtxt;

typedef struct AV1LrStruct {
  rest_unit_visitor_t on_rest_unit;
  FilterFrameCtxt ctxt[MAX_MB_PLANE];
  YV12_BUFFER_CONFIG *frame;
  YV12_BUFFER_CONFIG *dst;
} AV1LrStruct;

extern const sgr_params_type av1_sgr_params[SGRPROJ_PARAMS];
extern int sgrproj_mtable[SGRPROJ_PARAMS][2];
extern const int32_t av1_x_by_xplus1[256];
extern const int32_t av1_one_by_x[MAX_NELEM];

#if ISSUE_253
uint16_t *wienerns_copy_luma_with_virtual_lines(struct AV1Common *cm,
                                                uint16_t **luma_hbd);
#endif  // ISSUE_253

void av1_alloc_restoration_struct(struct AV1Common *cm, RestorationInfo *rsi,
                                  int is_uv);
void av1_free_restoration_struct(RestorationInfo *rst_info);

void av1_extend_frame(uint16_t *data, int width, int height, int stride,
                      int border_horz, int border_vert);
void av1_decode_xq(const int *xqd, int *xq, const sgr_params_type *params);

/*!\endcond */

/*!\brief Function for applying loop restoration filter to a single unit.
 *
 * \ingroup in_loop_restoration
 * This function applies the loop restoration filter to a single
 * loop restoration unit.
 *
 * \param[in]  limits        Limits of the unit
 * \param[in]  rui           The parameters to use for this unit and its
 *                           coefficients
 * \param[in]  rsb           Deblocked pixels to use for stripe boundaries
 * \param[in]  rlbs          Space to use as a scratch buffer
 * \param[in]  tile_rect     Limits of the tile containing this unit
 * \param[in]  tile_stripe0  Index of the first stripe in this tile
 * \param[in]  ss_x          Horizontal subsampling for plane
 * \param[in]  ss_y          Vertical subsampling for plane
 * \param[in]  bit_depth     Bit-depth of the video
 * \param[in]  data          Frame data (pointing at the top-left corner of
 *                           the frame, not the restoration unit).
 * \param[in]  stride        Stride of \c data
 * \param[out] dst           Buffer where the results will be written. Like
 *                           \c data, \c dst should point at the top-left
 *                           corner of the frame
 * \param[in]  dst_stride    Stride of \c dst
 * \param[in]  tmpbuf        Scratch buffer used by the sgrproj filter which
 *                           should be at least SGRPROJ_TMPBUF_SIZE big.
 * \param[in]  optimized_lr  Whether to use fast optimized Loop Restoration
 *
 * Nothing is returned. Instead, the filtered unit is output in \c dst
 * at the proper restoration unit offset.
 */
void av1_loop_restoration_filter_unit(
    const RestorationTileLimits *limits, const RestorationUnitInfo *rui,
    const RestorationStripeBoundaries *rsb, RestorationLineBuffers *rlbs,
    const AV1PixelRect *tile_rect, int tile_stripe0, int ss_x, int ss_y,
    int bit_depth, uint16_t *data, int stride, uint16_t *dst, int dst_stride,
    int32_t *tmpbuf, int optimized_lr);

/*!\brief Function for applying loop restoration filter to a frame
 *
 * \ingroup in_loop_restoration
 * This function applies the loop restoration filter to a frame.
 *
 * \param[in, out]  frame         Compressed frame buffer
 * \param[in, out]  cm            Pointer to top level common structure
 * \param[in]       optimized_lr  Whether to use fast optimized Loop Restoration
 * \param[in]       lr_ctxt       Loop restoration context
 *
 * Nothing is returned. Instead, the filtered frame is output in \c frame.
 */
void av1_loop_restoration_filter_frame(YV12_BUFFER_CONFIG *frame,
                                       struct AV1Common *cm, int optimized_lr,
                                       void *lr_ctxt);
/*!\cond */

#define DEF_UV_LR_TOOLS_DISABLE_MASK (1 << RESTORE_PC_WIENER)

void av1_loop_restoration_precal();

typedef void (*rest_tile_start_visitor_t)(int tile_row, int tile_col,
                                          void *priv);
struct AV1LrSyncData;

typedef void (*sync_read_fn_t)(void *const lr_sync, int r, int c, int plane);

typedef void (*sync_write_fn_t)(void *const lr_sync, int r, int c,
                                const int sb_cols, int plane);

// Call on_rest_unit for each loop restoration unit in a tile.
void av1_foreach_rest_unit_in_tile(const AV1PixelRect *tile_rect, int unit_idx0,
                                   int hunits_per_tile, int vunits_per_tile,
                                   int unit_stride, int unit_size, int ss_y,
                                   int plane, rest_unit_visitor_t on_rest_unit,
                                   void *priv, int32_t *tmpbuf,
                                   RestorationLineBuffers *rlbs,
                                   int *processed);
// Call on_rest_unit for each loop restoration unit in a coded SB.
void av1_foreach_rest_unit_in_sb(const AV1PixelRect *tile_rect, int unit_idx0,
                                 int hunits_per_tile, int vunits_per_tile,
                                 int unit_stride, int unit_size, int ss_y,
                                 int plane, rest_unit_visitor_t on_rest_unit,
                                 void *priv, int32_t *tmpbuf,
                                 RestorationLineBuffers *rlbs, int *processed);
// Call on_rest_unit for each loop restoration unit in the plane.
void av1_foreach_rest_unit_in_plane(const struct AV1Common *cm, int plane,
                                    rest_unit_visitor_t on_rest_unit,
                                    void *priv, AV1PixelRect *tile_rect,
                                    int32_t *tmpbuf,
                                    RestorationLineBuffers *rlbs);

// Return 1 iff the block at mi_row, mi_col with size bsize is a
// top-level superblock containing the top-left corner of at least one
// loop restoration unit.
//
// If the block is a top-level superblock, the function writes to
// *rcol0, *rcol1, *rrow0, *rrow1. The rectangle of restoration unit
// indices given by [*rcol0, *rcol1) x [*rrow0, *rrow1) are relative
// to the current tile, whose starting index is returned as
// *tile_tl_idx.
int av1_loop_restoration_corners_in_sb(const struct AV1Common *cm, int plane,
                                       int mi_row, int mi_col, BLOCK_SIZE bsize,
                                       int *rcol0, int *rcol1, int *rrow0,
                                       int *rrow1);

void av1_loop_restoration_save_boundary_lines(const YV12_BUFFER_CONFIG *frame,
                                              struct AV1Common *cm,
                                              int after_cdef);
void av1_loop_restoration_filter_frame_init(AV1LrStruct *lr_ctxt,
                                            YV12_BUFFER_CONFIG *frame,
                                            struct AV1Common *cm,
                                            int optimized_lr, int num_planes);
void av1_loop_restoration_copy_planes(AV1LrStruct *loop_rest_ctxt,
                                      struct AV1Common *cm, int num_planes);
void av1_foreach_rest_unit_in_row(
    RestorationTileLimits *limits, const AV1PixelRect *tile_rect,
    rest_unit_visitor_t on_rest_unit, int row_number, int unit_size,
    int unit_idx0, int hunits_per_tile, int vunits_per_tile, int unit_stride,
    int plane, void *priv, int32_t *tmpbuf, RestorationLineBuffers *rlbs,
    sync_read_fn_t on_sync_read, sync_write_fn_t on_sync_write,
    struct AV1LrSyncData *const lr_sync, int *processed);
AV1PixelRect av1_whole_frame_rect(const struct AV1Common *cm, int is_uv);
AV1PixelRect av1_get_rutile_rect(const struct AV1Common *cm, int is_uv,
                                 int ru_start_row, int ru_end_row,
                                 int ru_start_col, int ru_end_col,
                                 int ru_height, int ru_width);

int av1_lr_count_units_in_tile(int unit_size, int tile_size);
void av1_lr_sync_read_dummy(void *const lr_sync, int r, int c, int plane);
void av1_lr_sync_write_dummy(void *const lr_sync, int r, int c,
                             const int sb_cols, int plane);

#if CONFIG_BRU
void copy_tile(int width, int height, const uint16_t *src, int src_stride,
               uint16_t *dst, int dst_stride);
#endif  // CONFIG_BRU

void set_restoration_unit_size(int width, int height, int sx, int sy,
                               RestorationInfo *rst);

#if CONFIG_COMBINE_PC_NS_WIENER
static INLINE int to_readwrite_framefilters(const RestorationInfo *rsi,
                                            int mi_row, int mi_col) {
  return ((rsi->frame_restoration_type == RESTORE_WIENER_NONSEP ||
           rsi->frame_restoration_type == RESTORE_SWITCHABLE) &&
          rsi->frame_filters_on &&
#if CONFIG_TEMP_LR
          !rsi->temporal_pred_flag &&
#endif  // CONFIG_TEMP_LR
          mi_row == 0 && mi_col == 0);
}

void av1_copy_rst_frame_filters(RestorationInfo *to,
                                const RestorationInfo *from);
#endif  // CONFIG_COMBINE_PC_NS_WIENER

// returns 1 if sym does not need signaling because there are no asymmetric taps
// in the config
// returns 2 if sym does not need signaling because with asymmetric taps the
// number of taps exceeds the limit of 18 (WIENERNS_SIGNALED_TAPS_MAX).
// returns 0 if sym bit needs signaling
static INLINE int skip_sym_bit(const WienernsFilterParameters *nsfilter_params,
                               int subset) {
  const int beg_feat = 0;
  const int end_feat = nsfilter_params->ncoeffs;
  int ncoeffs1;
  config2ncoeffs(&nsfilter_params->nsfilter_config, &ncoeffs1, NULL);
  int num_taps = 0;
  int asym_taps = 0;
  for (int i = beg_feat; i < end_feat; ++i) {
    if (!nsfilter_params->subset_config[subset][i]) continue;
    const int is_asym_coeff =
        (i < nsfilter_params->nsfilter_config.asymmetric ||
         (i >= ncoeffs1 &&
          i - ncoeffs1 < nsfilter_params->nsfilter_config.asymmetric2));
    num_taps++;
    asym_taps += is_asym_coeff;
  }
  assert(num_taps - (asym_taps >> 1) <= WIENERNS_SIGNALED_TAPS_MAX);

  return (num_taps > WIENERNS_SIGNALED_TAPS_MAX ? 2 : (asym_taps == 0));
}
/*!\endcond */

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

#endif  // AOM_AV1_COMMON_RESTORATION_H_