ref: 53a0b134a6aa8a4577816c85a60b2a697bc5cdfd
dir: /vp9/common/vp9_mvref_common.h/
/*
* Copyright (c) 2012 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef VPX_VP9_COMMON_VP9_MVREF_COMMON_H_
#define VPX_VP9_COMMON_VP9_MVREF_COMMON_H_
#include "vp9/common/vp9_onyxc_int.h"
#include "vp9/common/vp9_blockd.h"
#ifdef __cplusplus
extern "C" {
#endif
#define LEFT_TOP_MARGIN ((VP9_ENC_BORDER_IN_PIXELS - VP9_INTERP_EXTEND) << 3)
#define RIGHT_BOTTOM_MARGIN \
((VP9_ENC_BORDER_IN_PIXELS - VP9_INTERP_EXTEND) << 3)
#define MVREF_NEIGHBOURS 8
typedef struct position {
int row;
int col;
} POSITION;
typedef enum {
BOTH_ZERO = 0,
ZERO_PLUS_PREDICTED = 1,
BOTH_PREDICTED = 2,
NEW_PLUS_NON_INTRA = 3,
BOTH_NEW = 4,
INTRA_PLUS_NON_INTRA = 5,
BOTH_INTRA = 6,
INVALID_CASE = 9
} motion_vector_context;
// This is used to figure out a context for the ref blocks. The code flattens
// an array that would have 3 possible counts (0, 1 & 2) for 3 choices by
// adding 9 for each intra block, 3 for each zero mv and 1 for each new
// motion vector. This single number is then converted into a context
// with a single lookup ( counter_to_context ).
static const int mode_2_counter[MB_MODE_COUNT] = {
9, // DC_PRED
9, // V_PRED
9, // H_PRED
9, // D45_PRED
9, // D135_PRED
9, // D117_PRED
9, // D153_PRED
9, // D207_PRED
9, // D63_PRED
9, // TM_PRED
0, // NEARESTMV
0, // NEARMV
3, // ZEROMV
1, // NEWMV
};
// There are 3^3 different combinations of 3 counts that can be either 0,1 or
// 2. However the actual count can never be greater than 2 so the highest
// counter we need is 18. 9 is an invalid counter that's never used.
static const int counter_to_context[19] = {
BOTH_PREDICTED, // 0
NEW_PLUS_NON_INTRA, // 1
BOTH_NEW, // 2
ZERO_PLUS_PREDICTED, // 3
NEW_PLUS_NON_INTRA, // 4
INVALID_CASE, // 5
BOTH_ZERO, // 6
INVALID_CASE, // 7
INVALID_CASE, // 8
INTRA_PLUS_NON_INTRA, // 9
INTRA_PLUS_NON_INTRA, // 10
INVALID_CASE, // 11
INTRA_PLUS_NON_INTRA, // 12
INVALID_CASE, // 13
INVALID_CASE, // 14
INVALID_CASE, // 15
INVALID_CASE, // 16
INVALID_CASE, // 17
BOTH_INTRA // 18
};
static const POSITION mv_ref_blocks[BLOCK_SIZES][MVREF_NEIGHBOURS] = {
// 4X4
{ { -1, 0 },
{ 0, -1 },
{ -1, -1 },
{ -2, 0 },
{ 0, -2 },
{ -2, -1 },
{ -1, -2 },
{ -2, -2 } },
// 4X8
{ { -1, 0 },
{ 0, -1 },
{ -1, -1 },
{ -2, 0 },
{ 0, -2 },
{ -2, -1 },
{ -1, -2 },
{ -2, -2 } },
// 8X4
{ { -1, 0 },
{ 0, -1 },
{ -1, -1 },
{ -2, 0 },
{ 0, -2 },
{ -2, -1 },
{ -1, -2 },
{ -2, -2 } },
// 8X8
{ { -1, 0 },
{ 0, -1 },
{ -1, -1 },
{ -2, 0 },
{ 0, -2 },
{ -2, -1 },
{ -1, -2 },
{ -2, -2 } },
// 8X16
{ { 0, -1 },
{ -1, 0 },
{ 1, -1 },
{ -1, -1 },
{ 0, -2 },
{ -2, 0 },
{ -2, -1 },
{ -1, -2 } },
// 16X8
{ { -1, 0 },
{ 0, -1 },
{ -1, 1 },
{ -1, -1 },
{ -2, 0 },
{ 0, -2 },
{ -1, -2 },
{ -2, -1 } },
// 16X16
{ { -1, 0 },
{ 0, -1 },
{ -1, 1 },
{ 1, -1 },
{ -1, -1 },
{ -3, 0 },
{ 0, -3 },
{ -3, -3 } },
// 16X32
{ { 0, -1 },
{ -1, 0 },
{ 2, -1 },
{ -1, -1 },
{ -1, 1 },
{ 0, -3 },
{ -3, 0 },
{ -3, -3 } },
// 32X16
{ { -1, 0 },
{ 0, -1 },
{ -1, 2 },
{ -1, -1 },
{ 1, -1 },
{ -3, 0 },
{ 0, -3 },
{ -3, -3 } },
// 32X32
{ { -1, 1 },
{ 1, -1 },
{ -1, 2 },
{ 2, -1 },
{ -1, -1 },
{ -3, 0 },
{ 0, -3 },
{ -3, -3 } },
// 32X64
{ { 0, -1 },
{ -1, 0 },
{ 4, -1 },
{ -1, 2 },
{ -1, -1 },
{ 0, -3 },
{ -3, 0 },
{ 2, -1 } },
// 64X32
{ { -1, 0 },
{ 0, -1 },
{ -1, 4 },
{ 2, -1 },
{ -1, -1 },
{ -3, 0 },
{ 0, -3 },
{ -1, 2 } },
// 64X64
{ { -1, 3 },
{ 3, -1 },
{ -1, 4 },
{ 4, -1 },
{ -1, -1 },
{ -1, 0 },
{ 0, -1 },
{ -1, 6 } }
};
static const int idx_n_column_to_subblock[4][2] = {
{ 1, 2 }, { 1, 3 }, { 3, 2 }, { 3, 3 }
};
// clamp_mv_ref
#define MV_BORDER (16 << 3) // Allow 16 pels in 1/8th pel units
static INLINE void clamp_mv_ref(MV *mv, const MACROBLOCKD *xd) {
clamp_mv(mv, xd->mb_to_left_edge - MV_BORDER,
xd->mb_to_right_edge + MV_BORDER, xd->mb_to_top_edge - MV_BORDER,
xd->mb_to_bottom_edge + MV_BORDER);
}
// This function returns either the appropriate sub block or block's mv
// on whether the block_size < 8x8 and we have check_sub_blocks set.
static INLINE int_mv get_sub_block_mv(const MODE_INFO *candidate, int which_mv,
int search_col, int block_idx) {
return block_idx >= 0 && candidate->sb_type < BLOCK_8X8
? candidate
->bmi[idx_n_column_to_subblock[block_idx][search_col == 0]]
.as_mv[which_mv]
: candidate->mv[which_mv];
}
// Performs mv sign inversion if indicated by the reference frame combination.
static INLINE int_mv scale_mv(const MODE_INFO *mi, int ref,
const MV_REFERENCE_FRAME this_ref_frame,
const int *ref_sign_bias) {
int_mv mv = mi->mv[ref];
if (ref_sign_bias[mi->ref_frame[ref]] != ref_sign_bias[this_ref_frame]) {
mv.as_mv.row *= -1;
mv.as_mv.col *= -1;
}
return mv;
}
// This macro is used to add a motion vector mv_ref list if it isn't
// already in the list. If it's the second motion vector it will also
// skip all additional processing and jump to Done!
#define ADD_MV_REF_LIST(mv, refmv_count, mv_ref_list, Done) \
do { \
if (refmv_count) { \
if ((mv).as_int != (mv_ref_list)[0].as_int) { \
(mv_ref_list)[(refmv_count)] = (mv); \
goto Done; \
} \
} else { \
(mv_ref_list)[(refmv_count)++] = (mv); \
} \
} while (0)
// If either reference frame is different, not INTRA, and they
// are different from each other scale and add the mv to our list.
#define IF_DIFF_REF_FRAME_ADD_MV(mbmi, ref_frame, ref_sign_bias, refmv_count, \
mv_ref_list, Done) \
do { \
if (is_inter_block(mbmi)) { \
if ((mbmi)->ref_frame[0] != (ref_frame)) \
ADD_MV_REF_LIST(scale_mv((mbmi), 0, ref_frame, ref_sign_bias), \
refmv_count, mv_ref_list, Done); \
if (has_second_ref(mbmi) && (mbmi)->ref_frame[1] != (ref_frame) && \
(mbmi)->mv[1].as_int != (mbmi)->mv[0].as_int) \
ADD_MV_REF_LIST(scale_mv((mbmi), 1, ref_frame, ref_sign_bias), \
refmv_count, mv_ref_list, Done); \
} \
} while (0)
// Checks that the given mi_row, mi_col and search point
// are inside the borders of the tile.
static INLINE int is_inside(const TileInfo *const tile, int mi_col, int mi_row,
int mi_rows, const POSITION *mi_pos) {
return !(mi_row + mi_pos->row < 0 ||
mi_col + mi_pos->col < tile->mi_col_start ||
mi_row + mi_pos->row >= mi_rows ||
mi_col + mi_pos->col >= tile->mi_col_end);
}
// TODO(jingning): this mv clamping function should be block size dependent.
static INLINE void clamp_mv2(MV *mv, const MACROBLOCKD *xd) {
clamp_mv(mv, xd->mb_to_left_edge - LEFT_TOP_MARGIN,
xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN,
xd->mb_to_top_edge - LEFT_TOP_MARGIN,
xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN);
}
static INLINE void lower_mv_precision(MV *mv, int allow_hp) {
const int use_hp = allow_hp && use_mv_hp(mv);
if (!use_hp) {
if (mv->row & 1) mv->row += (mv->row > 0 ? -1 : 1);
if (mv->col & 1) mv->col += (mv->col > 0 ? -1 : 1);
}
}
typedef void (*find_mv_refs_sync)(void *const data, int mi_row);
void vp9_find_mv_refs(const VP9_COMMON *cm, const MACROBLOCKD *xd,
MODE_INFO *mi, MV_REFERENCE_FRAME ref_frame,
int_mv *mv_ref_list, int mi_row, int mi_col,
uint8_t *mode_context);
// check a list of motion vectors by sad score using a number rows of pixels
// above and a number cols of pixels in the left to select the one with best
// score to use as ref motion vector
void vp9_find_best_ref_mvs(MACROBLOCKD *xd, int allow_hp, int_mv *mvlist,
int_mv *nearest_mv, int_mv *near_mv);
void vp9_append_sub8x8_mvs_for_idx(VP9_COMMON *cm, MACROBLOCKD *xd, int block,
int ref, int mi_row, int mi_col,
int_mv *nearest_mv, int_mv *near_mv,
uint8_t *mode_context);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // VPX_VP9_COMMON_VP9_MVREF_COMMON_H_