av1/common/reconinter.h - aom - Git at Google

 /*
  * 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.
  */

 #ifndef AV1_COMMON_RECONINTER_H_
 #define AV1_COMMON_RECONINTER_H_

 #include "aom/aom_integer.h"
 #include "aom_dsp/aom_filter.h"
 #include "av1/common/convolve.h"
 #include "av1/common/filter.h"
 #include "av1/common/onyxc_int.h"

 #ifdef __cplusplus
 extern "C" {
 #endif

 static INLINE void inter_predictor(const uint8_t *src, int src_stride,
                                    uint8_t *dst, int dst_stride,
                                    const int subpel_x, const int subpel_y,
                                    const struct scale_factors *sf, int w, int h,
                                    int ref, const InterpFilter *interp_filter,
                                    int xs, int ys) {
   InterpFilterParams interp_filter_params =
       get_interp_filter_params(*interp_filter);
   if (interp_filter_params.taps == SUBPEL_TAPS && w > 2 && h > 2) {
     const int16_t *filter_x =
         get_interp_filter_subpel_kernel(interp_filter_params, subpel_x);
     const int16_t *filter_y =
         get_interp_filter_subpel_kernel(interp_filter_params, subpel_y);

     sf->predict[subpel_x != 0][subpel_y != 0][ref](
         src, src_stride, dst, dst_stride, filter_x, xs, filter_y, ys, w, h);
   } else {
     av1_convolve(src, src_stride, dst, dst_stride, w, h, interp_filter,
                  subpel_x, xs, subpel_y, ys, ref);
   }
 }

 #if CONFIG_AOM_HIGHBITDEPTH
 static INLINE void high_inter_predictor(const uint8_t *src, int src_stride,
                                         uint8_t *dst, int dst_stride,
                                         const int subpel_x, const int subpel_y,
                                         const struct scale_factors *sf, int w,
                                         int h, int ref,
                                         const InterpFilter *interp_filter,
                                         int xs, int ys, int bd) {
   InterpFilterParams interp_filter_params =
       get_interp_filter_params(*interp_filter);
   if (interp_filter_params.taps == SUBPEL_TAPS && w > 2 && h > 2) {
     const int16_t *filter_x =
         get_interp_filter_subpel_kernel(interp_filter_params, subpel_x);
     const int16_t *filter_y =
         get_interp_filter_subpel_kernel(interp_filter_params, subpel_y);

     sf->highbd_predict[subpel_x != 0][subpel_y != 0][ref](
         src, src_stride, dst, dst_stride, filter_x, xs, filter_y, ys, w, h, bd);
   } else {
     av1_highbd_convolve(src, src_stride, dst, dst_stride, w, h, interp_filter,
                         subpel_x, xs, subpel_y, ys, ref, bd);
   }
 }
 #endif  // CONFIG_AOM_HIGHBITDEPTH

 static INLINE int round_mv_comp_q4(int value) {
   return (value < 0 ? value - 2 : value + 2) / 4;
 }

 static MV mi_mv_pred_q4(const MODE_INFO *mi, int idx) {
   MV res = {
     round_mv_comp_q4(
         mi->bmi[0].as_mv[idx].as_mv.row + mi->bmi[1].as_mv[idx].as_mv.row +
         mi->bmi[2].as_mv[idx].as_mv.row + mi->bmi[3].as_mv[idx].as_mv.row),
     round_mv_comp_q4(
         mi->bmi[0].as_mv[idx].as_mv.col + mi->bmi[1].as_mv[idx].as_mv.col +
         mi->bmi[2].as_mv[idx].as_mv.col + mi->bmi[3].as_mv[idx].as_mv.col)
   };
   return res;
 }

 static INLINE int round_mv_comp_q2(int value) {
   return (value < 0 ? value - 1 : value + 1) / 2;
 }

 static MV mi_mv_pred_q2(const MODE_INFO *mi, int idx, int block0, int block1) {
   MV res = { round_mv_comp_q2(mi->bmi[block0].as_mv[idx].as_mv.row +
                               mi->bmi[block1].as_mv[idx].as_mv.row),
              round_mv_comp_q2(mi->bmi[block0].as_mv[idx].as_mv.col +
                               mi->bmi[block1].as_mv[idx].as_mv.col) };
   return res;
 }

 // TODO(jkoleszar): yet another mv clamping function :-(
 static INLINE MV clamp_mv_to_umv_border_sb(const MACROBLOCKD *xd,
                                            const MV *src_mv, int bw, int bh,
                                            int ss_x, int ss_y) {
   // 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.
   const int spel_left = (AOM_INTERP_EXTEND + bw) << SUBPEL_BITS;
   const int spel_right = spel_left - SUBPEL_SHIFTS;
   const int spel_top = (AOM_INTERP_EXTEND + bh) << SUBPEL_BITS;
   const int spel_bottom = spel_top - SUBPEL_SHIFTS;
   MV clamped_mv = { src_mv->row * (1 << (1 - ss_y)),
                     src_mv->col * (1 << (1 - ss_x)) };
   assert(ss_x <= 1);
   assert(ss_y <= 1);

   clamp_mv(&clamped_mv, xd->mb_to_left_edge * (1 << (1 - ss_x)) - spel_left,
            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;
 }

 static INLINE MV average_split_mvs(const struct macroblockd_plane *pd,
                                    const MODE_INFO *mi, int ref, int block) {
   const int ss_idx = ((pd->subsampling_x > 0) << 1) | (pd->subsampling_y > 0);
   MV res = { 0, 0 };
   switch (ss_idx) {
     case 0: res = mi->bmi[block].as_mv[ref].as_mv; break;
     case 1: res = mi_mv_pred_q2(mi, ref, block, block + 2); break;
     case 2: res = mi_mv_pred_q2(mi, ref, block, block + 1); break;
     case 3: res = mi_mv_pred_q4(mi, ref); break;
     default: assert(ss_idx <= 3 && ss_idx >= 0);
   }
   return res;
 }

 void build_inter_predictors(MACROBLOCKD *xd, int plane,
 #if CONFIG_MOTION_VAR
                             int mi_col_offset, int mi_row_offset,
 #endif  // CONFIG_MOTION_VAR
                             int block, int bw, int bh, int x, int y, int w,
                             int h, int mi_x, int mi_y);

 void av1_build_inter_predictor_sub8x8(MACROBLOCKD *xd, int plane, int i, int ir,
                                       int ic, int mi_row, int mi_col);

 void av1_build_inter_predictors_sby(MACROBLOCKD *xd, int mi_row, int mi_col,
                                     BLOCK_SIZE bsize);

 void av1_build_inter_predictors_sbp(MACROBLOCKD *xd, int mi_row, int mi_col,
                                     BLOCK_SIZE bsize, int plane);

 void av1_build_inter_predictors_sbuv(MACROBLOCKD *xd, int mi_row, int mi_col,
                                      BLOCK_SIZE bsize);

 void av1_build_inter_predictors_sb(MACROBLOCKD *xd, int mi_row, int mi_col,
                                    BLOCK_SIZE bsize);

 void av1_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, const InterpFilter *interp_filter,
                                enum mv_precision precision, int x, int y);

 #if CONFIG_AOM_HIGHBITDEPTH
 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,
     const InterpFilter *interp_filter, enum mv_precision precision, int x,
     int y, int bd);
 #endif

 static INLINE int scaled_buffer_offset(int x_offset, int y_offset, int stride,
                                        const struct scale_factors *sf) {
   const int x = sf ? sf->scale_value_x(x_offset, sf) : x_offset;
   const int y = sf ? sf->scale_value_y(y_offset, sf) : y_offset;
   return y * stride + x;
 }

 static INLINE void setup_pred_plane(struct buf_2d *dst, uint8_t *src,
                                     int stride, int mi_row, int mi_col,
                                     const struct scale_factors *scale,
                                     int subsampling_x, int subsampling_y) {
   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);
   dst->stride = stride;
 }

 void av1_setup_dst_planes(struct macroblockd_plane planes[MAX_MB_PLANE],
                           const YV12_BUFFER_CONFIG *src, int mi_row,
                           int mi_col);

 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);

 #if CONFIG_MOTION_VAR
 void av1_setup_obmc_mask(int length, const uint8_t *mask[2]);
 void av1_build_obmc_inter_prediction(const AV1_COMMON *cm, MACROBLOCKD *xd,
                                      int mi_row, int mi_col,
                                      int use_tmp_dst_buf,
                                      uint8_t *final_buf[MAX_MB_PLANE],
                                      const int final_stride[MAX_MB_PLANE],
                                      uint8_t *above_pred_buf[MAX_MB_PLANE],
                                      const int above_pred_stride[MAX_MB_PLANE],
                                      uint8_t *left_pred_buf[MAX_MB_PLANE],
                                      const int left_pred_stride[MAX_MB_PLANE]);
 void av1_build_prediction_by_above_preds(const AV1_COMMON *cm, MACROBLOCKD *xd,
                                          int mi_row, int mi_col,
                                          uint8_t *tmp_buf[MAX_MB_PLANE],
                                          const int tmp_stride[MAX_MB_PLANE]);
 void av1_build_prediction_by_left_preds(const AV1_COMMON *cm, MACROBLOCKD *xd,
                                         int mi_row, int mi_col,
                                         uint8_t *tmp_buf[MAX_MB_PLANE],
                                         const int tmp_stride[MAX_MB_PLANE]);
 void av1_build_obmc_inter_predictors_sb(const AV1_COMMON *cm, MACROBLOCKD *xd,
                                         int mi_row, int mi_col);
 #endif  // CONFIG_MOTION_VAR
 static INLINE int has_subpel_mv_component(const MODE_INFO *const mi,
                                           const MACROBLOCKD *const xd,
                                           int dir) {
   const MB_MODE_INFO *const mbmi = &mi->mbmi;
   const BLOCK_SIZE bsize = mbmi->sb_type;
   const int ref = (dir >> 1);

   if (bsize >= BLOCK_8X8) {
     if (dir & 0x01) {
       if (mbmi->mv[ref].as_mv.col & SUBPEL_MASK) return 1;
     } else {
       if (mbmi->mv[ref].as_mv.row & SUBPEL_MASK) return 1;
     }
   } else {
     int plane;
     for (plane = 0; plane < MAX_MB_PLANE; ++plane) {
       const PARTITION_TYPE bp = BLOCK_8X8 - bsize;
       const struct macroblockd_plane *const pd = &xd->plane[plane];
       const int have_vsplit = bp != PARTITION_HORZ;
       const int have_hsplit = bp != PARTITION_VERT;
       const int num_4x4_w = 2 >> ((!have_vsplit) | pd->subsampling_x);
       const int num_4x4_h = 2 >> ((!have_hsplit) | pd->subsampling_y);

       int x, y;
       for (y = 0; y < num_4x4_h; ++y) {
         for (x = 0; x < num_4x4_w; ++x) {
           const MV mv = average_split_mvs(pd, mi, ref, y * 2 + x);
           if (dir & 0x01) {
             if (mv.col & SUBPEL_MASK) return 1;
           } else {
             if (mv.row & SUBPEL_MASK) return 1;
           }
         }
       }
     }
   }
   return 0;
 }

 static INLINE int is_interp_needed(const MACROBLOCKD *const xd) {
   MODE_INFO *const mi = xd->mi[0];
   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;
       }
     }
   }
   return 0;
 }

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

 #endif  // AV1_COMMON_RECONINTER_H_
	/*
	* 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.
	*/

	#ifndef AV1_COMMON_RECONINTER_H_
	#define AV1_COMMON_RECONINTER_H_

	#include "aom/aom_integer.h"
	#include "aom_dsp/aom_filter.h"
	#include "av1/common/convolve.h"
	#include "av1/common/filter.h"
	#include "av1/common/onyxc_int.h"

	#ifdef __cplusplus
	extern "C" {
	#endif

	static INLINE void inter_predictor(const uint8_t *src, int src_stride,
	uint8_t *dst, int dst_stride,
	const int subpel_x, const int subpel_y,
	const struct scale_factors *sf, int w, int h,
	int ref, const InterpFilter *interp_filter,
	int xs, int ys) {
	InterpFilterParams interp_filter_params =
	get_interp_filter_params(*interp_filter);
	if (interp_filter_params.taps == SUBPEL_TAPS && w > 2 && h > 2) {
	const int16_t *filter_x =
	get_interp_filter_subpel_kernel(interp_filter_params, subpel_x);
	const int16_t *filter_y =
	get_interp_filter_subpel_kernel(interp_filter_params, subpel_y);

	sf->predict[subpel_x != 0][subpel_y != 0][ref](
	src, src_stride, dst, dst_stride, filter_x, xs, filter_y, ys, w, h);
	} else {
	av1_convolve(src, src_stride, dst, dst_stride, w, h, interp_filter,
	subpel_x, xs, subpel_y, ys, ref);
	}
	}

	#if CONFIG_AOM_HIGHBITDEPTH
	static INLINE void high_inter_predictor(const uint8_t *src, int src_stride,
	uint8_t *dst, int dst_stride,
	const int subpel_x, const int subpel_y,
	const struct scale_factors *sf, int w,
	int h, int ref,
	const InterpFilter *interp_filter,
	int xs, int ys, int bd) {
	InterpFilterParams interp_filter_params =
	get_interp_filter_params(*interp_filter);
	if (interp_filter_params.taps == SUBPEL_TAPS && w > 2 && h > 2) {
	const int16_t *filter_x =
	get_interp_filter_subpel_kernel(interp_filter_params, subpel_x);
	const int16_t *filter_y =
	get_interp_filter_subpel_kernel(interp_filter_params, subpel_y);

	sf->highbd_predict[subpel_x != 0][subpel_y != 0][ref](
	src, src_stride, dst, dst_stride, filter_x, xs, filter_y, ys, w, h, bd);
	} else {
	av1_highbd_convolve(src, src_stride, dst, dst_stride, w, h, interp_filter,
	subpel_x, xs, subpel_y, ys, ref, bd);
	}
	}
	#endif // CONFIG_AOM_HIGHBITDEPTH

	static INLINE int round_mv_comp_q4(int value) {
	return (value < 0 ? value - 2 : value + 2) / 4;
	}

	static MV mi_mv_pred_q4(const MODE_INFO *mi, int idx) {
	MV res = {
	round_mv_comp_q4(
	mi->bmi[0].as_mv[idx].as_mv.row + mi->bmi[1].as_mv[idx].as_mv.row +
	mi->bmi[2].as_mv[idx].as_mv.row + mi->bmi[3].as_mv[idx].as_mv.row),
	round_mv_comp_q4(
	mi->bmi[0].as_mv[idx].as_mv.col + mi->bmi[1].as_mv[idx].as_mv.col +
	mi->bmi[2].as_mv[idx].as_mv.col + mi->bmi[3].as_mv[idx].as_mv.col)
	};
	return res;
	}

	static INLINE int round_mv_comp_q2(int value) {
	return (value < 0 ? value - 1 : value + 1) / 2;
	}

	static MV mi_mv_pred_q2(const MODE_INFO *mi, int idx, int block0, int block1) {
	MV res = { round_mv_comp_q2(mi->bmi[block0].as_mv[idx].as_mv.row +
	mi->bmi[block1].as_mv[idx].as_mv.row),
	round_mv_comp_q2(mi->bmi[block0].as_mv[idx].as_mv.col +
	mi->bmi[block1].as_mv[idx].as_mv.col) };
	return res;
	}

	// TODO(jkoleszar): yet another mv clamping function :-(
	static INLINE MV clamp_mv_to_umv_border_sb(const MACROBLOCKD *xd,
	const MV *src_mv, int bw, int bh,
	int ss_x, int ss_y) {
	// 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.
	const int spel_left = (AOM_INTERP_EXTEND + bw) << SUBPEL_BITS;
	const int spel_right = spel_left - SUBPEL_SHIFTS;
	const int spel_top = (AOM_INTERP_EXTEND + bh) << SUBPEL_BITS;
	const int spel_bottom = spel_top - SUBPEL_SHIFTS;
	MV clamped_mv = { src_mv->row * (1 << (1 - ss_y)),
	src_mv->col * (1 << (1 - ss_x)) };
	assert(ss_x <= 1);
	assert(ss_y <= 1);

	clamp_mv(&clamped_mv, xd->mb_to_left_edge * (1 << (1 - ss_x)) - spel_left,
	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;
	}

	static INLINE MV average_split_mvs(const struct macroblockd_plane *pd,
	const MODE_INFO *mi, int ref, int block) {
	const int ss_idx = ((pd->subsampling_x > 0) << 1) \| (pd->subsampling_y > 0);
	MV res = { 0, 0 };
	switch (ss_idx) {
	case 0: res = mi->bmi[block].as_mv[ref].as_mv; break;
	case 1: res = mi_mv_pred_q2(mi, ref, block, block + 2); break;
	case 2: res = mi_mv_pred_q2(mi, ref, block, block + 1); break;
	case 3: res = mi_mv_pred_q4(mi, ref); break;
	default: assert(ss_idx <= 3 && ss_idx >= 0);
	}
	return res;
	}

	void build_inter_predictors(MACROBLOCKD *xd, int plane,
	#if CONFIG_MOTION_VAR
	int mi_col_offset, int mi_row_offset,
	#endif // CONFIG_MOTION_VAR
	int block, int bw, int bh, int x, int y, int w,
	int h, int mi_x, int mi_y);

	void av1_build_inter_predictor_sub8x8(MACROBLOCKD *xd, int plane, int i, int ir,
	int ic, int mi_row, int mi_col);

	void av1_build_inter_predictors_sby(MACROBLOCKD *xd, int mi_row, int mi_col,
	BLOCK_SIZE bsize);

	void av1_build_inter_predictors_sbp(MACROBLOCKD *xd, int mi_row, int mi_col,
	BLOCK_SIZE bsize, int plane);

	void av1_build_inter_predictors_sbuv(MACROBLOCKD *xd, int mi_row, int mi_col,
	BLOCK_SIZE bsize);

	void av1_build_inter_predictors_sb(MACROBLOCKD *xd, int mi_row, int mi_col,
	BLOCK_SIZE bsize);

	void av1_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, const InterpFilter *interp_filter,
	enum mv_precision precision, int x, int y);

	#if CONFIG_AOM_HIGHBITDEPTH
	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,
	const InterpFilter *interp_filter, enum mv_precision precision, int x,
	int y, int bd);
	#endif

	static INLINE int scaled_buffer_offset(int x_offset, int y_offset, int stride,
	const struct scale_factors *sf) {
	const int x = sf ? sf->scale_value_x(x_offset, sf) : x_offset;
	const int y = sf ? sf->scale_value_y(y_offset, sf) : y_offset;
	return y * stride + x;
	}

	static INLINE void setup_pred_plane(struct buf_2d dst, uint8_t src,
	int stride, int mi_row, int mi_col,
	const struct scale_factors *scale,
	int subsampling_x, int subsampling_y) {
	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);
	dst->stride = stride;
	}

	void av1_setup_dst_planes(struct macroblockd_plane planes[MAX_MB_PLANE],
	const YV12_BUFFER_CONFIG *src, int mi_row,
	int mi_col);

	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);

	#if CONFIG_MOTION_VAR
	void av1_setup_obmc_mask(int length, const uint8_t *mask[2]);
	void av1_build_obmc_inter_prediction(const AV1_COMMON cm, MACROBLOCKD xd,
	int mi_row, int mi_col,
	int use_tmp_dst_buf,
	uint8_t *final_buf[MAX_MB_PLANE],
	const int final_stride[MAX_MB_PLANE],
	uint8_t *above_pred_buf[MAX_MB_PLANE],
	const int above_pred_stride[MAX_MB_PLANE],
	uint8_t *left_pred_buf[MAX_MB_PLANE],
	const int left_pred_stride[MAX_MB_PLANE]);
	void av1_build_prediction_by_above_preds(const AV1_COMMON cm, MACROBLOCKD xd,
	int mi_row, int mi_col,
	uint8_t *tmp_buf[MAX_MB_PLANE],
	const int tmp_stride[MAX_MB_PLANE]);
	void av1_build_prediction_by_left_preds(const AV1_COMMON cm, MACROBLOCKD xd,
	int mi_row, int mi_col,
	uint8_t *tmp_buf[MAX_MB_PLANE],
	const int tmp_stride[MAX_MB_PLANE]);
	void av1_build_obmc_inter_predictors_sb(const AV1_COMMON cm, MACROBLOCKD xd,
	int mi_row, int mi_col);
	#endif // CONFIG_MOTION_VAR
	static INLINE int has_subpel_mv_component(const MODE_INFO *const mi,
	const MACROBLOCKD *const xd,
	int dir) {
	const MB_MODE_INFO *const mbmi = &mi->mbmi;
	const BLOCK_SIZE bsize = mbmi->sb_type;
	const int ref = (dir >> 1);

	if (bsize >= BLOCK_8X8) {
	if (dir & 0x01) {
	if (mbmi->mv[ref].as_mv.col & SUBPEL_MASK) return 1;
	} else {
	if (mbmi->mv[ref].as_mv.row & SUBPEL_MASK) return 1;
	}
	} else {
	int plane;
	for (plane = 0; plane < MAX_MB_PLANE; ++plane) {
	const PARTITION_TYPE bp = BLOCK_8X8 - bsize;
	const struct macroblockd_plane *const pd = &xd->plane[plane];
	const int have_vsplit = bp != PARTITION_HORZ;
	const int have_hsplit = bp != PARTITION_VERT;
	const int num_4x4_w = 2 >> ((!have_vsplit) \| pd->subsampling_x);
	const int num_4x4_h = 2 >> ((!have_hsplit) \| pd->subsampling_y);

	int x, y;
	for (y = 0; y < num_4x4_h; ++y) {
	for (x = 0; x < num_4x4_w; ++x) {
	const MV mv = average_split_mvs(pd, mi, ref, y * 2 + x);
	if (dir & 0x01) {
	if (mv.col & SUBPEL_MASK) return 1;
	} else {
	if (mv.row & SUBPEL_MASK) return 1;
	}
	}
	}
	}
	}
	return 0;
	}

	static INLINE int is_interp_needed(const MACROBLOCKD *const xd) {
	MODE_INFO *const mi = xd->mi[0];
	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;
	}
	}
	}
	return 0;
	}

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

	#endif // AV1_COMMON_RECONINTER_H_