reconinter.h 21.1 KB
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/*
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 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
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 *
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 * 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.
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 */

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#ifndef AV1_COMMON_RECONINTER_H_
#define AV1_COMMON_RECONINTER_H_
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#include "av1/common/filter.h"
#include "av1/common/onyxc_int.h"
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#include "av1/common/convolve.h"
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#include "av1/common/warped_motion.h"
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#include "aom/aom_integer.h"
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#define WARP_WM_NEIGHBORS_WITH_OBMC 0
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#define WARP_GM_NEIGHBORS_WITH_OBMC 0
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// Work out how many pixels off the edge of a reference frame we're allowed
// to go when forming an inter prediction.
// The outermost row/col of each referernce frame is extended by
// (AOM_BORDER_IN_PIXELS >> subsampling) pixels, but we need to keep
// at least AOM_INTERP_EXTEND pixels within that to account for filtering.
//
// We have to break this up into two macros to keep both clang-format and
// tools/lint-hunks.py happy.
#define AOM_LEFT_TOP_MARGIN_PX(subsampling) \
  ((AOM_BORDER_IN_PIXELS >> subsampling) - AOM_INTERP_EXTEND)
#define AOM_LEFT_TOP_MARGIN_SCALED(subsampling) \
  (AOM_LEFT_TOP_MARGIN_PX(subsampling) << SCALE_SUBPEL_BITS)
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#ifdef __cplusplus
extern "C" {
#endif

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static INLINE int has_scale(int xs, int ys) {
  return xs != SCALE_SUBPEL_SHIFTS || ys != SCALE_SUBPEL_SHIFTS;
}
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static INLINE void inter_predictor(const uint8_t *src, int src_stride,
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                                   uint8_t *dst, int dst_stride, int subpel_x,
                                   int subpel_y, const struct scale_factors *sf,
                                   int w, int h, ConvolveParams *conv_params,
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                                   InterpFilters interp_filters, int xs,
                                   int ys) {
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  assert(conv_params->do_average == 0 || conv_params->do_average == 1);
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  assert(sf);
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  if (has_scale(xs, ys)) {
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    // TODO(afergs, debargha): Use a different scale convolve function
    // that uses higher precision for subpel_x, subpel_y, xs, ys
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    if (conv_params->round == CONVOLVE_OPT_NO_ROUND) {
      av1_convolve_2d_facade(src, src_stride, dst, dst_stride, w, h,
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                             interp_filters, subpel_x, xs, subpel_y, ys, 1,
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                             conv_params, sf);
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      conv_params->do_post_rounding = 1;
    } else {
      assert(conv_params->round == CONVOLVE_OPT_ROUND);
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      av1_convolve_scale(src, src_stride, dst, dst_stride, w, h, interp_filters,
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                         subpel_x, xs, subpel_y, ys, conv_params);
    }
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  } else {
    subpel_x >>= SCALE_EXTRA_BITS;
    subpel_y >>= SCALE_EXTRA_BITS;
    xs >>= SCALE_EXTRA_BITS;
    ys >>= SCALE_EXTRA_BITS;
    assert(subpel_x < SUBPEL_SHIFTS);
    assert(subpel_y < SUBPEL_SHIFTS);
    assert(xs <= SUBPEL_SHIFTS);
    assert(ys <= SUBPEL_SHIFTS);
    if (conv_params->round == CONVOLVE_OPT_NO_ROUND) {
      av1_convolve_2d_facade(src, src_stride, dst, dst_stride, w, h,
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                             interp_filters, subpel_x, xs, subpel_y, ys, 0,
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                             conv_params, sf);
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      if (conv_params->is_compound)
        conv_params->do_post_rounding = 1;
      else
        conv_params->do_post_rounding = 0;
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    } else {
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      assert(conv_params->round == CONVOLVE_OPT_ROUND);
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      InterpFilterParams filter_params_x, filter_params_y;
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#if CONFIG_SHORT_FILTER
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      av1_get_convolve_filter_params(interp_filters, &filter_params_x,
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                                     &filter_params_y, w, h);
#else
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      av1_get_convolve_filter_params(interp_filters, &filter_params_x,
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                                     &filter_params_y);

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#endif

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      if (w <= 2 || h <= 2) {
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        av1_convolve_c(src, src_stride, dst, dst_stride, w, h, interp_filters,
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                       subpel_x, xs, subpel_y, ys, conv_params);
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      } else if (filter_params_x.taps == SUBPEL_TAPS &&
                 filter_params_y.taps == SUBPEL_TAPS) {
        const int16_t *kernel_x =
            av1_get_interp_filter_subpel_kernel(filter_params_x, subpel_x);
        const int16_t *kernel_y =
            av1_get_interp_filter_subpel_kernel(filter_params_y, subpel_y);
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        sf->predict[subpel_x != 0][subpel_y != 0][conv_params->do_average](
            src, src_stride, dst, dst_stride, kernel_x, xs, kernel_y, ys, w, h);
      } else {
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        av1_convolve(src, src_stride, dst, dst_stride, w, h, interp_filters,
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                     subpel_x, xs, subpel_y, ys, conv_params);
      }
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    }
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  }
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}

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static INLINE void highbd_inter_predictor(const uint8_t *src, int src_stride,
                                          uint8_t *dst, int dst_stride,
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                                          int subpel_x, int subpel_y,
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                                          const struct scale_factors *sf, int w,
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                                          int h, ConvolveParams *conv_params,
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                                          InterpFilters interp_filters, int xs,
                                          int ys, int bd) {
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  const int avg = conv_params->do_average;
  assert(avg == 0 || avg == 1);
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  if (has_scale(xs, ys)) {
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    if (conv_params->round == CONVOLVE_OPT_NO_ROUND) {
      av1_highbd_convolve_2d_facade(src, src_stride, dst, dst_stride, w, h,
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                                    interp_filters, subpel_x, xs, subpel_y, ys,
                                    1, conv_params, bd);
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      conv_params->do_post_rounding = 1;
    } else {
      av1_highbd_convolve_scale(src, src_stride, dst, dst_stride, w, h,
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                                interp_filters, subpel_x, xs, subpel_y, ys, avg,
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                                bd);
    }
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  } else {
    subpel_x >>= SCALE_EXTRA_BITS;
    subpel_y >>= SCALE_EXTRA_BITS;
    xs >>= SCALE_EXTRA_BITS;
    ys >>= SCALE_EXTRA_BITS;
    assert(subpel_x < SUBPEL_SHIFTS);
    assert(subpel_y < SUBPEL_SHIFTS);
    assert(xs <= SUBPEL_SHIFTS);
    assert(ys <= SUBPEL_SHIFTS);
    if (conv_params->round == CONVOLVE_OPT_NO_ROUND) {
      av1_highbd_convolve_2d_facade(src, src_stride, dst, dst_stride, w, h,
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                                    interp_filters, subpel_x, xs, subpel_y, ys,
                                    0, conv_params, bd);
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      conv_params->do_post_rounding = 1;
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    } else {
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      InterpFilterParams filter_params_x, filter_params_y;
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#if CONFIG_SHORT_FILTER
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      av1_get_convolve_filter_params(interp_filters, &filter_params_x,
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                                     &filter_params_y, w, h);
#else
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      av1_get_convolve_filter_params(interp_filters, &filter_params_x,
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                                     &filter_params_y);
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#endif
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      if (filter_params_x.taps == SUBPEL_TAPS &&
          filter_params_y.taps == SUBPEL_TAPS && w > 2 && h > 2) {
        const int16_t *kernel_x =
            av1_get_interp_filter_subpel_kernel(filter_params_x, subpel_x);
        const int16_t *kernel_y =
            av1_get_interp_filter_subpel_kernel(filter_params_y, subpel_y);
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        sf->highbd_predict[subpel_x != 0][subpel_y != 0][avg](
            src, src_stride, dst, dst_stride, kernel_x, xs, kernel_y, ys, w, h,
            bd);
      } else {
        av1_highbd_convolve(src, src_stride, dst, dst_stride, w, h,
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                            interp_filters, subpel_x, xs, subpel_y, ys, avg,
                            bd);
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      }
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    }
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  }
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}

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// Set to (1 << 5) if the 32-ary codebooks are used for any bock size
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#define MAX_WEDGE_TYPES (1 << 4)
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#define MAX_WEDGE_SIZE_LOG2 5  // 32x32
#define MAX_WEDGE_SIZE (1 << MAX_WEDGE_SIZE_LOG2)
#define MAX_WEDGE_SQUARE (MAX_WEDGE_SIZE * MAX_WEDGE_SIZE)
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#define WEDGE_WEIGHT_BITS 6

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#define WEDGE_NONE -1
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// Angles are with respect to horizontal anti-clockwise
typedef enum {
  WEDGE_HORIZONTAL = 0,
  WEDGE_VERTICAL = 1,
  WEDGE_OBLIQUE27 = 2,
  WEDGE_OBLIQUE63 = 3,
  WEDGE_OBLIQUE117 = 4,
  WEDGE_OBLIQUE153 = 5,
  WEDGE_DIRECTIONS
} WedgeDirectionType;

// 3-tuple: {direction, x_offset, y_offset}
typedef struct {
  WedgeDirectionType direction;
  int x_offset;
  int y_offset;
} wedge_code_type;

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typedef uint8_t *wedge_masks_type[MAX_WEDGE_TYPES];

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typedef struct {
  int bits;
  const wedge_code_type *codebook;
  uint8_t *signflip;
  int smoother;
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  wedge_masks_type *masks;
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} wedge_params_type;

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extern const wedge_params_type wedge_params_lookup[BLOCK_SIZES_ALL];
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static INLINE int is_interinter_compound_used(COMPOUND_TYPE type,
                                              BLOCK_SIZE sb_type) {
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  const int comp_allowed = is_comp_ref_allowed(sb_type);
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  switch (type) {
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    case COMPOUND_AVERAGE:
    case COMPOUND_SEG: return comp_allowed;
    case COMPOUND_WEDGE:
      return comp_allowed && wedge_params_lookup[sb_type].bits > 0;
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    default: assert(0); return 0;
  }
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}
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static INLINE int is_any_masked_compound_used(BLOCK_SIZE sb_type) {
  COMPOUND_TYPE comp_type;
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  if (!is_comp_ref_allowed(sb_type)) return 0;
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  for (comp_type = 0; comp_type < COMPOUND_TYPES; comp_type++) {
    if (is_masked_compound_type(comp_type) &&
        is_interinter_compound_used(comp_type, sb_type))
      return 1;
  }
  return 0;
}

static INLINE int get_wedge_bits_lookup(BLOCK_SIZE sb_type) {
  return wedge_params_lookup[sb_type].bits;
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}

static INLINE int get_interinter_wedge_bits(BLOCK_SIZE sb_type) {
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  const int wbits = wedge_params_lookup[sb_type].bits;
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  return (wbits > 0) ? wbits + 1 : 0;
}

static INLINE int is_interintra_wedge_used(BLOCK_SIZE sb_type) {
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  (void)sb_type;
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  return wedge_params_lookup[sb_type].bits > 0;
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}

static INLINE int get_interintra_wedge_bits(BLOCK_SIZE sb_type) {
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  return wedge_params_lookup[sb_type].bits;
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}
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void build_compound_seg_mask(uint8_t *mask, SEG_MASK_TYPE mask_type,
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                             const uint8_t *src0, int src0_stride,
                             const uint8_t *src1, int src1_stride,
                             BLOCK_SIZE sb_type, int h, int w);
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void build_compound_seg_mask_highbd(uint8_t *mask, SEG_MASK_TYPE mask_type,
                                    const uint8_t *src0, int src0_stride,
                                    const uint8_t *src1, int src1_stride,
                                    BLOCK_SIZE sb_type, int h, int w, int bd);
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void av1_make_masked_inter_predictor(
    const uint8_t *pre, int pre_stride, uint8_t *dst, int dst_stride,
    const int subpel_x, const int subpel_y, const struct scale_factors *sf,
    int w, int h, ConvolveParams *conv_params, InterpFilters interp_filters,
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    int xs, int ys, int plane, const WarpTypesAllowed *warp_types, int p_col,
    int p_row, int ref, MACROBLOCKD *xd);
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// TODO(jkoleszar): yet another mv clamping function :-(
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static INLINE MV clamp_mv_to_umv_border_sb(const MACROBLOCKD *xd,
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                                           const MV *src_mv, int bw, int bh,
                                           int ss_x, int ss_y) {
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  // If the MV points so far into the UMV border that no visible pixels
  // are used for reconstruction, the subpel part of the MV can be
  // discarded and the MV limited to 16 pixels with equivalent results.
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  const int spel_left = (AOM_INTERP_EXTEND + bw) << SUBPEL_BITS;
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  const int spel_right = spel_left - SUBPEL_SHIFTS;
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  const int spel_top = (AOM_INTERP_EXTEND + bh) << SUBPEL_BITS;
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  const int spel_bottom = spel_top - SUBPEL_SHIFTS;
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  MV clamped_mv = { src_mv->row * (1 << (1 - ss_y)),
                    src_mv->col * (1 << (1 - ss_x)) };
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  assert(ss_x <= 1);
  assert(ss_y <= 1);

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  clamp_mv(&clamped_mv, xd->mb_to_left_edge * (1 << (1 - ss_x)) - spel_left,
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           xd->mb_to_right_edge * (1 << (1 - ss_x)) + spel_right,
           xd->mb_to_top_edge * (1 << (1 - ss_y)) - spel_top,
           xd->mb_to_bottom_edge * (1 << (1 - ss_y)) + spel_bottom);

  return clamped_mv;
}

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void av1_build_inter_predictors_sby(const AV1_COMMON *cm, MACROBLOCKD *xd,
                                    int mi_row, int mi_col, BUFFER_SET *ctx,
                                    BLOCK_SIZE bsize);
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void av1_build_inter_predictors_sbuv(const AV1_COMMON *cm, MACROBLOCKD *xd,
                                     int mi_row, int mi_col, BUFFER_SET *ctx,
                                     BLOCK_SIZE bsize);
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void av1_build_inter_predictors_sb(const AV1_COMMON *cm, MACROBLOCKD *xd,
                                   int mi_row, int mi_col, BUFFER_SET *ctx,
                                   BLOCK_SIZE bsize);
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void av1_build_inter_predictor(
    const uint8_t *src, int src_stride, uint8_t *dst, int dst_stride,
    const MV *src_mv, const struct scale_factors *sf, int w, int h,
    ConvolveParams *conv_params, InterpFilters interp_filters,
    const WarpTypesAllowed *warp_types, int p_col, int p_row, int plane,
    int ref, enum mv_precision precision, int x, int y, const MACROBLOCKD *xd);
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void av1_highbd_build_inter_predictor(
    const uint8_t *src, int src_stride, uint8_t *dst, int dst_stride,
    const MV *mv_q3, const struct scale_factors *sf, int w, int h, int do_avg,
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    InterpFilters interp_filters, const WarpTypesAllowed *warp_types, int p_col,
    int p_row, int plane, enum mv_precision precision, int x, int y,
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    const MACROBLOCKD *xd);
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static INLINE int scaled_buffer_offset(int x_offset, int y_offset, int stride,
                                       const struct scale_factors *sf) {
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  const int x =
      sf ? sf->scale_value_x(x_offset, sf) >> SCALE_EXTRA_BITS : x_offset;
  const int y =
      sf ? sf->scale_value_y(y_offset, sf) >> SCALE_EXTRA_BITS : y_offset;
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  return y * stride + x;
}

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static INLINE void setup_pred_plane(struct buf_2d *dst, BLOCK_SIZE bsize,
                                    uint8_t *src, int width, int height,
                                    int stride, int mi_row, int mi_col,
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                                    const struct scale_factors *scale,
                                    int subsampling_x, int subsampling_y) {
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  // Offset the buffer pointer
  if (subsampling_y && (mi_row & 0x01) && (mi_size_high[bsize] == 1))
    mi_row -= 1;
  if (subsampling_x && (mi_col & 0x01) && (mi_size_wide[bsize] == 1))
    mi_col -= 1;
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  const int x = (MI_SIZE * mi_col) >> subsampling_x;
  const int y = (MI_SIZE * mi_row) >> subsampling_y;
  dst->buf = src + scaled_buffer_offset(x, y, stride, scale);
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  dst->buf0 = src;
  dst->width = width;
  dst->height = height;
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  dst->stride = stride;
}

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void av1_setup_dst_planes(struct macroblockd_plane *planes, BLOCK_SIZE bsize,
                          const YV12_BUFFER_CONFIG *src, int mi_row,
                          int mi_col);
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void av1_setup_pre_planes(MACROBLOCKD *xd, int idx,
                          const YV12_BUFFER_CONFIG *src, int mi_row, int mi_col,
                          const struct scale_factors *sf);
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// Detect if the block have sub-pixel level motion vectors
// per component.
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#define CHECK_SUBPEL 0
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static INLINE int has_subpel_mv_component(const MODE_INFO *const mi,
                                          const MACROBLOCKD *const xd,
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                                          int dir) {
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#if CHECK_SUBPEL
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  const MB_MODE_INFO *const mbmi = &mi->mbmi;
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  const BLOCK_SIZE bsize = mbmi->sb_type;
  int plane;
  int ref = (dir >> 1);

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  if (dir & 0x01) {
    if (mbmi->mv[ref].as_mv.col & SUBPEL_MASK) return 1;
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  } else {
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    if (mbmi->mv[ref].as_mv.row & SUBPEL_MASK) return 1;
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  }

  return 0;
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#else
  (void)mi;
  (void)xd;
  (void)dir;
  return 1;
#endif
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}

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static INLINE void set_default_interp_filters(
    MB_MODE_INFO *const mbmi, InterpFilter frame_interp_filter) {
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  mbmi->interp_filters =
      av1_broadcast_interp_filter(av1_unswitchable_filter(frame_interp_filter));
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}

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static INLINE int av1_is_interp_needed(const MACROBLOCKD *const xd) {
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  (void)xd;
  const MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
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#if CONFIG_EXT_SKIP
  if (mbmi->skip_mode) return 0;
#endif  // CONFIG_EXT_SKIP
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  if (mbmi->motion_mode == WARPED_CAUSAL) return 0;
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  if (is_nontrans_global_motion(xd)) return 0;
  return 1;
}

static INLINE int av1_is_interp_search_needed(const MACROBLOCKD *const xd) {
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  MODE_INFO *const mi = xd->mi[0];
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  const int is_compound = has_second_ref(&mi->mbmi);
  int ref;
  for (ref = 0; ref < 1 + is_compound; ++ref) {
    int row_col;
    for (row_col = 0; row_col < 2; ++row_col) {
      const int dir = (ref << 1) + row_col;
      if (has_subpel_mv_component(mi, xd, dir)) {
        return 1;
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      }
    }
  }
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  return 0;
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}
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const uint8_t *av1_get_obmc_mask(int length);
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void av1_count_overlappable_neighbors(const AV1_COMMON *cm, MACROBLOCKD *xd,
                                      int mi_row, int mi_col);
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void av1_build_obmc_inter_prediction(const AV1_COMMON *cm, MACROBLOCKD *xd,
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                                     int mi_row, int mi_col,
                                     uint8_t *above[MAX_MB_PLANE],
                                     int above_stride[MAX_MB_PLANE],
                                     uint8_t *left[MAX_MB_PLANE],
                                     int left_stride[MAX_MB_PLANE]);
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void av1_build_prediction_by_above_preds(const AV1_COMMON *cm, MACROBLOCKD *xd,
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                                         int mi_row, int mi_col,
                                         uint8_t *tmp_buf[MAX_MB_PLANE],
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                                         int tmp_width[MAX_MB_PLANE],
                                         int tmp_height[MAX_MB_PLANE],
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                                         int tmp_stride[MAX_MB_PLANE]);
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void av1_build_prediction_by_left_preds(const AV1_COMMON *cm, MACROBLOCKD *xd,
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                                        int mi_row, int mi_col,
                                        uint8_t *tmp_buf[MAX_MB_PLANE],
                                        int tmp_width[MAX_MB_PLANE],
                                        int tmp_height[MAX_MB_PLANE],
                                        int tmp_stride[MAX_MB_PLANE]);
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void av1_build_obmc_inter_predictors_sb(const AV1_COMMON *cm, MACROBLOCKD *xd,
                                        int mi_row, int mi_col);
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#define MASK_MASTER_SIZE ((MAX_WEDGE_SIZE) << 1)
#define MASK_MASTER_STRIDE (MASK_MASTER_SIZE)
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void av1_init_wedge_masks();
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static INLINE const uint8_t *av1_get_contiguous_soft_mask(int wedge_index,
                                                          int wedge_sign,
                                                          BLOCK_SIZE sb_type) {
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  return wedge_params_lookup[sb_type].masks[wedge_sign][wedge_index];
}

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const uint8_t *av1_get_soft_mask(int wedge_index, int wedge_sign,
                                 BLOCK_SIZE sb_type, int wedge_offset_x,
                                 int wedge_offset_y);

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const uint8_t *av1_get_compound_type_mask_inverse(
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    const INTERINTER_COMPOUND_DATA *const comp_data, uint8_t *mask_buffer,
    int h, int w, int stride, BLOCK_SIZE sb_type);
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const uint8_t *av1_get_compound_type_mask(
    const INTERINTER_COMPOUND_DATA *const comp_data, BLOCK_SIZE sb_type);
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void av1_build_interintra_predictors(const AV1_COMMON *cm, MACROBLOCKD *xd,
                                     uint8_t *ypred, uint8_t *upred,
                                     uint8_t *vpred, int ystride, int ustride,
                                     int vstride, BUFFER_SET *ctx,
                                     BLOCK_SIZE bsize);
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void av1_build_interintra_predictors_sby(const AV1_COMMON *cm, MACROBLOCKD *xd,
                                         uint8_t *ypred, int ystride,
                                         BUFFER_SET *ctx, BLOCK_SIZE bsize);
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void av1_build_interintra_predictors_sbc(const AV1_COMMON *cm, MACROBLOCKD *xd,
                                         uint8_t *upred, int ustride,
                                         BUFFER_SET *ctx, int plane,
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                                         BLOCK_SIZE bsize);
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void av1_build_interintra_predictors_sbuv(const AV1_COMMON *cm, MACROBLOCKD *xd,
                                          uint8_t *upred, uint8_t *vpred,
                                          int ustride, int vstride,
                                          BUFFER_SET *ctx, BLOCK_SIZE bsize);

void av1_build_intra_predictors_for_interintra(
    const AV1_COMMON *cm, MACROBLOCKD *xd, BLOCK_SIZE bsize, int plane,
    BUFFER_SET *ctx, uint8_t *intra_pred, int intra_stride);
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void av1_combine_interintra(MACROBLOCKD *xd, BLOCK_SIZE bsize, int plane,
                            const uint8_t *inter_pred, int inter_stride,
                            const uint8_t *intra_pred, int intra_stride);
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// Encoder only
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void av1_build_inter_predictors_for_planes_single_buf(
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    MACROBLOCKD *xd, BLOCK_SIZE bsize, int plane_from, int plane_to, int mi_row,
    int mi_col, int ref, uint8_t *ext_dst[3], int ext_dst_stride[3]);
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void av1_build_wedge_inter_predictor_from_buf(MACROBLOCKD *xd, BLOCK_SIZE bsize,
                                              int plane_from, int plane_to,
                                              uint8_t *ext_dst0[3],
                                              int ext_dst_stride0[3],
                                              uint8_t *ext_dst1[3],
                                              int ext_dst_stride1[3]);
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#if CONFIG_JNT_COMP
void av1_jnt_comp_weight_assign(const AV1_COMMON *cm, const MB_MODE_INFO *mbmi,
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                                int order_idx, int *fwd_offset, int *bck_offset,
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                                int *use_jnt_comp_avg, int is_compound);
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#endif  // CONFIG_JNT_COMP

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

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#endif  // AV1_COMMON_RECONINTER_H_