349 строки
12 KiB
C
349 строки
12 KiB
C
/*
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* Copyright (c) 2012 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VP10_COMMON_MVREF_COMMON_H_
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#define VP10_COMMON_MVREF_COMMON_H_
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#include "vp10/common/onyxc_int.h"
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#include "vp10/common/blockd.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define MVREF_NEIGHBOURS 8
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typedef struct position {
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int row;
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int col;
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} POSITION;
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typedef enum {
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BOTH_ZERO = 0,
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ZERO_PLUS_PREDICTED = 1,
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BOTH_PREDICTED = 2,
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NEW_PLUS_NON_INTRA = 3,
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BOTH_NEW = 4,
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INTRA_PLUS_NON_INTRA = 5,
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BOTH_INTRA = 6,
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INVALID_CASE = 9
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} motion_vector_context;
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// This is used to figure out a context for the ref blocks. The code flattens
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// an array that would have 3 possible counts (0, 1 & 2) for 3 choices by
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// adding 9 for each intra block, 3 for each zero mv and 1 for each new
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// motion vector. This single number is then converted into a context
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// with a single lookup ( counter_to_context ).
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static const int mode_2_counter[MB_MODE_COUNT] = {
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9, // DC_PRED
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9, // V_PRED
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9, // H_PRED
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9, // D45_PRED
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9, // D135_PRED
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9, // D117_PRED
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9, // D153_PRED
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9, // D207_PRED
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9, // D63_PRED
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9, // TM_PRED
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0, // NEARESTMV
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0, // NEARMV
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3, // ZEROMV
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1, // NEWMV
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#if CONFIG_EXT_INTER
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1, // NEWFROMNEARMV
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0, // NEAREST_NEARESTMV
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0, // NEAREST_NEARMV
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0, // NEAR_NEARESTMV
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1, // NEAREST_NEWMV
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1, // NEW_NEARESTMV
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1, // NEAR_NEWMV
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1, // NEW_NEARMV
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3, // ZERO_ZEROMV
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1, // NEW_NEWMV
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#endif // CONFIG_EXT_INTER
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};
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// There are 3^3 different combinations of 3 counts that can be either 0,1 or
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// 2. However the actual count can never be greater than 2 so the highest
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// counter we need is 18. 9 is an invalid counter that's never used.
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static const int counter_to_context[19] = {
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BOTH_PREDICTED, // 0
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NEW_PLUS_NON_INTRA, // 1
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BOTH_NEW, // 2
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ZERO_PLUS_PREDICTED, // 3
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NEW_PLUS_NON_INTRA, // 4
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INVALID_CASE, // 5
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BOTH_ZERO, // 6
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INVALID_CASE, // 7
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INVALID_CASE, // 8
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INTRA_PLUS_NON_INTRA, // 9
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INTRA_PLUS_NON_INTRA, // 10
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INVALID_CASE, // 11
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INTRA_PLUS_NON_INTRA, // 12
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INVALID_CASE, // 13
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INVALID_CASE, // 14
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INVALID_CASE, // 15
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INVALID_CASE, // 16
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INVALID_CASE, // 17
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BOTH_INTRA // 18
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};
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static const POSITION mv_ref_blocks[BLOCK_SIZES][MVREF_NEIGHBOURS] = {
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// 4X4
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{{-1, 0}, {0, -1}, {-1, -1}, {-2, 0}, {0, -2}, {-2, -1}, {-1, -2}, {-2, -2}},
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// 4X8
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{{-1, 0}, {0, -1}, {-1, -1}, {-2, 0}, {0, -2}, {-2, -1}, {-1, -2}, {-2, -2}},
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// 8X4
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{{-1, 0}, {0, -1}, {-1, -1}, {-2, 0}, {0, -2}, {-2, -1}, {-1, -2}, {-2, -2}},
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// 8X8
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{{-1, 0}, {0, -1}, {-1, -1}, {-2, 0}, {0, -2}, {-2, -1}, {-1, -2}, {-2, -2}},
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// 8X16
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{{0, -1}, {-1, 0}, {1, -1}, {-1, -1}, {0, -2}, {-2, 0}, {-2, -1}, {-1, -2}},
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// 16X8
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{{-1, 0}, {0, -1}, {-1, 1}, {-1, -1}, {-2, 0}, {0, -2}, {-1, -2}, {-2, -1}},
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// 16X16
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{{-1, 0}, {0, -1}, {-1, 1}, {1, -1}, {-1, -1}, {-3, 0}, {0, -3}, {-3, -3}},
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// 16X32
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{{0, -1}, {-1, 0}, {2, -1}, {-1, -1}, {-1, 1}, {0, -3}, {-3, 0}, {-3, -3}},
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// 32X16
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{{-1, 0}, {0, -1}, {-1, 2}, {-1, -1}, {1, -1}, {-3, 0}, {0, -3}, {-3, -3}},
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// 32X32
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{{-1, 1}, {1, -1}, {-1, 2}, {2, -1}, {-1, -1}, {-3, 0}, {0, -3}, {-3, -3}},
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// 32X64
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{{0, -1}, {-1, 0}, {4, -1}, {-1, 2}, {-1, -1}, {0, -3}, {-3, 0}, {2, -1}},
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// 64X32
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{{-1, 0}, {0, -1}, {-1, 4}, {2, -1}, {-1, -1}, {-3, 0}, {0, -3}, {-1, 2}},
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// 64X64
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{{-1, 3}, {3, -1}, {-1, 4}, {4, -1}, {-1, -1}, {-1, 0}, {0, -1}, {-1, 6}}
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};
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static const int idx_n_column_to_subblock[4][2] = {
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{1, 2},
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{1, 3},
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{3, 2},
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{3, 3}
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};
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// clamp_mv_ref
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#define MV_BORDER (8 << 3) // Allow 8 pels in 1/8th pel units
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static INLINE void clamp_mv_ref(MV *mv, int bw, int bh, const MACROBLOCKD *xd) {
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clamp_mv(mv, xd->mb_to_left_edge - bw * 8 - MV_BORDER,
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xd->mb_to_right_edge + bw * 8 + MV_BORDER,
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xd->mb_to_top_edge - bh * 8 - MV_BORDER,
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xd->mb_to_bottom_edge + bh * 8 + MV_BORDER);
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}
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// This function returns either the appropriate sub block or block's mv
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// on whether the block_size < 8x8 and we have check_sub_blocks set.
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static INLINE int_mv get_sub_block_mv(const MODE_INFO *candidate, int which_mv,
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int search_col, int block_idx) {
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return block_idx >= 0 && candidate->mbmi.sb_type < BLOCK_8X8
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? candidate->bmi[idx_n_column_to_subblock[block_idx][search_col == 0]]
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.as_mv[which_mv]
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: candidate->mbmi.mv[which_mv];
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}
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#if CONFIG_REF_MV
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static INLINE int_mv get_sub_block_pred_mv(const MODE_INFO *candidate,
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int which_mv,
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int search_col, int block_idx) {
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return block_idx >= 0 && candidate->mbmi.sb_type < BLOCK_8X8
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? candidate->bmi[idx_n_column_to_subblock[block_idx][search_col == 0]]
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.pred_mv[which_mv]
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: candidate->mbmi.pred_mv[which_mv];
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}
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#endif
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// Performs mv sign inversion if indicated by the reference frame combination.
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static INLINE int_mv scale_mv(const MB_MODE_INFO *mbmi, int ref,
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const MV_REFERENCE_FRAME this_ref_frame,
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const int *ref_sign_bias) {
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int_mv mv = mbmi->mv[ref];
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if (ref_sign_bias[mbmi->ref_frame[ref]] != ref_sign_bias[this_ref_frame]) {
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mv.as_mv.row *= -1;
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mv.as_mv.col *= -1;
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}
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return mv;
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}
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#define CLIP_IN_ADD(mv, bw, bh, xd) clamp_mv_ref(mv, bw, bh, xd)
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// This macro is used to add a motion vector mv_ref list if it isn't
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// already in the list. If it's the second motion vector it will also
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// skip all additional processing and jump to done!
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#define ADD_MV_REF_LIST(mv, refmv_count, mv_ref_list, bw, bh, xd, Done) \
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do { \
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(mv_ref_list)[(refmv_count)] = (mv); \
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CLIP_IN_ADD(&(mv_ref_list)[(refmv_count)].as_mv, (bw), (bh), (xd)); \
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if (refmv_count && (mv_ref_list)[1].as_int != (mv_ref_list)[0].as_int) { \
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(refmv_count) = 2; \
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goto Done; \
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} \
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(refmv_count) = 1; \
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} while (0)
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// If either reference frame is different, not INTRA, and they
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// are different from each other scale and add the mv to our list.
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#define IF_DIFF_REF_FRAME_ADD_MV(mbmi, ref_frame, ref_sign_bias, refmv_count, \
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mv_ref_list, bw, bh, xd, Done) \
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do { \
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if (is_inter_block(mbmi)) { \
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if ((mbmi)->ref_frame[0] != ref_frame) \
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ADD_MV_REF_LIST(scale_mv((mbmi), 0, ref_frame, ref_sign_bias), \
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refmv_count, mv_ref_list, bw, bh, xd, Done); \
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if (has_second_ref(mbmi) && \
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(mbmi)->ref_frame[1] != ref_frame) \
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ADD_MV_REF_LIST(scale_mv((mbmi), 1, ref_frame, ref_sign_bias), \
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refmv_count, mv_ref_list, bw, bh, xd, Done); \
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} \
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} while (0)
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// Checks that the given mi_row, mi_col and search point
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// are inside the borders of the tile.
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static INLINE int is_inside(const TileInfo *const tile,
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int mi_col, int mi_row, int mi_rows,
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const POSITION *mi_pos) {
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return !(mi_row + mi_pos->row < 0 ||
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mi_col + mi_pos->col < tile->mi_col_start ||
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mi_row + mi_pos->row >= mi_rows ||
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mi_col + mi_pos->col >= tile->mi_col_end);
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}
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static INLINE void lower_mv_precision(MV *mv, int allow_hp) {
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const int use_hp = allow_hp && vp10_use_mv_hp(mv);
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if (!use_hp) {
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if (mv->row & 1)
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mv->row += (mv->row > 0 ? -1 : 1);
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if (mv->col & 1)
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mv->col += (mv->col > 0 ? -1 : 1);
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}
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}
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#if CONFIG_REF_MV
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static INLINE int vp10_nmv_ctx(const uint8_t ref_mv_count,
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const CANDIDATE_MV *ref_mv_stack) {
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#if CONFIG_EXT_INTER
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return 0;
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#endif
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if (ref_mv_stack[0].weight > REF_CAT_LEVEL &&
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ref_mv_count > 0) {
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if (abs(ref_mv_stack[0].this_mv.as_mv.row -
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ref_mv_stack[0].pred_mv.as_mv.row) <= 4 &&
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abs(ref_mv_stack[0].this_mv.as_mv.col -
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ref_mv_stack[0].pred_mv.as_mv.col) <= 4)
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return 2;
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else
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return 1;
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}
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return 0;
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}
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static INLINE int8_t vp10_ref_frame_type(const MV_REFERENCE_FRAME *const rf) {
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if (rf[1] > INTRA_FRAME)
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return rf[0] + ALTREF_FRAME;
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return rf[0];
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}
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static INLINE void vp10_set_ref_frame(MV_REFERENCE_FRAME *rf,
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int8_t ref_frame_type) {
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if (ref_frame_type > ALTREF_FRAME) {
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rf[0] = ref_frame_type - ALTREF_FRAME;
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rf[1] = ALTREF_FRAME;
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} else {
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rf[0] = ref_frame_type;
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rf[1] = NONE;
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assert(ref_frame_type > INTRA_FRAME && ref_frame_type < MAX_REF_FRAMES);
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}
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}
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static INLINE int16_t vp10_mode_context_analyzer(
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const int16_t *const mode_context, const MV_REFERENCE_FRAME *const rf,
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BLOCK_SIZE bsize, int block) {
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int16_t mode_ctx = 0;
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if (block >= 0) {
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mode_ctx = mode_context[rf[0]] & 0x00ff;
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if (block > 0 && bsize < BLOCK_8X8 && bsize > BLOCK_4X4)
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mode_ctx |= (1 << SKIP_NEARESTMV_SUB8X8_OFFSET);
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return mode_ctx;
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}
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if (rf[1] > INTRA_FRAME)
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return mode_context[rf[0]] & (mode_context[rf[1]] | 0x00ff);
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else if (rf[0] != ALTREF_FRAME)
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return mode_context[rf[0]] & ~(mode_context[ALTREF_FRAME] & 0xfe00);
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else
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return mode_context[rf[0]];
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}
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static INLINE uint8_t vp10_drl_ctx(const CANDIDATE_MV *ref_mv_stack,
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int ref_idx) {
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if (ref_mv_stack[ref_idx].weight > REF_CAT_LEVEL &&
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ref_mv_stack[ref_idx + 1].weight > REF_CAT_LEVEL)
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return 0;
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if (ref_mv_stack[ref_idx].weight > REF_CAT_LEVEL &&
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ref_mv_stack[ref_idx + 1].weight < REF_CAT_LEVEL)
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return 1;
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if (ref_mv_stack[ref_idx].weight < REF_CAT_LEVEL &&
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ref_mv_stack[ref_idx + 1].weight < REF_CAT_LEVEL)
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return 2;
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assert(0);
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return 0;
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}
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#endif
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typedef void (*find_mv_refs_sync)(void *const data, int mi_row);
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void vp10_find_mv_refs(const VP10_COMMON *cm, const MACROBLOCKD *xd,
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MODE_INFO *mi, MV_REFERENCE_FRAME ref_frame,
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#if CONFIG_REF_MV
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uint8_t *ref_mv_count,
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CANDIDATE_MV *ref_mv_stack,
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#if CONFIG_EXT_INTER
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int16_t *compound_mode_context,
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#endif // CONFIG_EXT_INTER
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#endif
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int_mv *mv_ref_list, int mi_row, int mi_col,
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find_mv_refs_sync sync, void *const data,
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int16_t *mode_context);
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// check a list of motion vectors by sad score using a number rows of pixels
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// above and a number cols of pixels in the left to select the one with best
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// score to use as ref motion vector
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void vp10_find_best_ref_mvs(int allow_hp,
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int_mv *mvlist, int_mv *nearest_mv, int_mv *near_mv);
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void vp10_append_sub8x8_mvs_for_idx(VP10_COMMON *cm, MACROBLOCKD *xd,
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int block, int ref, int mi_row, int mi_col,
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#if CONFIG_EXT_INTER
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int_mv *mv_list,
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#endif // CONFIG_EXT_INTER
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int_mv *nearest_mv, int_mv *near_mv);
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#if CONFIG_EXT_INTER
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// This function keeps a mode count for a given MB/SB
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void vp10_update_mv_context(const VP10_COMMON *cm, const MACROBLOCKD *xd,
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MODE_INFO *mi, MV_REFERENCE_FRAME ref_frame,
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int_mv *mv_ref_list,
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int block, int mi_row, int mi_col,
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int16_t *mode_context);
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#endif // CONFIG_EXT_INTER
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // VP10_COMMON_MVREF_COMMON_H_
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