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diff --git a/media/libaom/src/av1/common/mvref_common.h b/media/libaom/src/av1/common/mvref_common.h
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+/*
+ * 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 AOM_AV1_COMMON_MVREF_COMMON_H_
+#define AOM_AV1_COMMON_MVREF_COMMON_H_
+
+#include "av1/common/onyxc_int.h"
+#include "av1/common/blockd.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define MVREF_ROW_COLS 3
+
+// Set the upper limit of the motion vector component magnitude.
+// This would make a motion vector fit in 26 bits. Plus 3 bits for the
+// reference frame index. A tuple of motion vector can hence be stored within
+// 32 bit range for efficient load/store operations.
+#define REFMVS_LIMIT ((1 << 12) - 1)
+
+typedef struct position {
+ int row;
+ int col;
+} POSITION;
+
+// clamp_mv_ref
+#define MV_BORDER (16 << 3) // Allow 16 pels in 1/8th pel units
+
+static INLINE int get_relative_dist(const AV1_COMMON *cm, int a, int b) {
+ if (!cm->seq_params.enable_order_hint) return 0;
+
+ const int bits = cm->seq_params.order_hint_bits_minus_1 + 1;
+
+ assert(bits >= 1);
+ assert(a >= 0 && a < (1 << bits));
+ assert(b >= 0 && b < (1 << bits));
+
+ int diff = a - b;
+ const int m = 1 << (bits - 1);
+ diff = (diff & (m - 1)) - (diff & m);
+ return diff;
+}
+
+static INLINE void clamp_mv_ref(MV *mv, int bw, int bh, const MACROBLOCKD *xd) {
+ clamp_mv(mv, xd->mb_to_left_edge - bw * 8 - MV_BORDER,
+ xd->mb_to_right_edge + bw * 8 + MV_BORDER,
+ xd->mb_to_top_edge - bh * 8 - MV_BORDER,
+ xd->mb_to_bottom_edge + bh * 8 + 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 MB_MODE_INFO *candidate,
+ int which_mv, int search_col) {
+ (void)search_col;
+ return candidate->mv[which_mv];
+}
+
+static INLINE int_mv get_sub_block_pred_mv(const MB_MODE_INFO *candidate,
+ int which_mv, int search_col) {
+ (void)search_col;
+ return candidate->mv[which_mv];
+}
+
+// Performs mv sign inversion if indicated by the reference frame combination.
+static INLINE int_mv scale_mv(const MB_MODE_INFO *mbmi, int ref,
+ const MV_REFERENCE_FRAME this_ref_frame,
+ const int *ref_sign_bias) {
+ int_mv mv = mbmi->mv[ref];
+ if (ref_sign_bias[mbmi->ref_frame[ref]] != ref_sign_bias[this_ref_frame]) {
+ mv.as_mv.row *= -1;
+ mv.as_mv.col *= -1;
+ }
+ return mv;
+}
+
+// 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,
+ const POSITION *mi_pos) {
+ return !(mi_row + mi_pos->row < tile->mi_row_start ||
+ mi_col + mi_pos->col < tile->mi_col_start ||
+ mi_row + mi_pos->row >= tile->mi_row_end ||
+ mi_col + mi_pos->col >= tile->mi_col_end);
+}
+
+static INLINE int find_valid_row_offset(const TileInfo *const tile, int mi_row,
+ int row_offset) {
+ return clamp(row_offset, tile->mi_row_start - mi_row,
+ tile->mi_row_end - mi_row - 1);
+}
+
+static INLINE int find_valid_col_offset(const TileInfo *const tile, int mi_col,
+ int col_offset) {
+ return clamp(col_offset, tile->mi_col_start - mi_col,
+ tile->mi_col_end - mi_col - 1);
+}
+
+static INLINE void lower_mv_precision(MV *mv, int allow_hp, int is_integer) {
+ if (is_integer) {
+ integer_mv_precision(mv);
+ } else {
+ if (!allow_hp) {
+ if (mv->row & 1) mv->row += (mv->row > 0 ? -1 : 1);
+ if (mv->col & 1) mv->col += (mv->col > 0 ? -1 : 1);
+ }
+ }
+}
+
+static INLINE int8_t get_uni_comp_ref_idx(const MV_REFERENCE_FRAME *const rf) {
+ // Single ref pred
+ if (rf[1] <= INTRA_FRAME) return -1;
+
+ // Bi-directional comp ref pred
+ if ((rf[0] < BWDREF_FRAME) && (rf[1] >= BWDREF_FRAME)) return -1;
+
+ for (int8_t ref_idx = 0; ref_idx < TOTAL_UNIDIR_COMP_REFS; ++ref_idx) {
+ if (rf[0] == comp_ref0(ref_idx) && rf[1] == comp_ref1(ref_idx))
+ return ref_idx;
+ }
+ return -1;
+}
+
+static INLINE int8_t av1_ref_frame_type(const MV_REFERENCE_FRAME *const rf) {
+ if (rf[1] > INTRA_FRAME) {
+ const int8_t uni_comp_ref_idx = get_uni_comp_ref_idx(rf);
+ if (uni_comp_ref_idx >= 0) {
+ assert((REF_FRAMES + FWD_REFS * BWD_REFS + uni_comp_ref_idx) <
+ MODE_CTX_REF_FRAMES);
+ return REF_FRAMES + FWD_REFS * BWD_REFS + uni_comp_ref_idx;
+ } else {
+ return REF_FRAMES + FWD_RF_OFFSET(rf[0]) +
+ BWD_RF_OFFSET(rf[1]) * FWD_REFS;
+ }
+ }
+
+ return rf[0];
+}
+
+// clang-format off
+static MV_REFERENCE_FRAME ref_frame_map[TOTAL_COMP_REFS][2] = {
+ { LAST_FRAME, BWDREF_FRAME }, { LAST2_FRAME, BWDREF_FRAME },
+ { LAST3_FRAME, BWDREF_FRAME }, { GOLDEN_FRAME, BWDREF_FRAME },
+
+ { LAST_FRAME, ALTREF2_FRAME }, { LAST2_FRAME, ALTREF2_FRAME },
+ { LAST3_FRAME, ALTREF2_FRAME }, { GOLDEN_FRAME, ALTREF2_FRAME },
+
+ { LAST_FRAME, ALTREF_FRAME }, { LAST2_FRAME, ALTREF_FRAME },
+ { LAST3_FRAME, ALTREF_FRAME }, { GOLDEN_FRAME, ALTREF_FRAME },
+
+ { LAST_FRAME, LAST2_FRAME }, { LAST_FRAME, LAST3_FRAME },
+ { LAST_FRAME, GOLDEN_FRAME }, { BWDREF_FRAME, ALTREF_FRAME },
+
+ // NOTE: Following reference frame pairs are not supported to be explicitly
+ // signalled, but they are possibly chosen by the use of skip_mode,
+ // which may use the most recent one-sided reference frame pair.
+ { LAST2_FRAME, LAST3_FRAME }, { LAST2_FRAME, GOLDEN_FRAME },
+ { LAST3_FRAME, GOLDEN_FRAME }, {BWDREF_FRAME, ALTREF2_FRAME},
+ { ALTREF2_FRAME, ALTREF_FRAME }
+};
+// clang-format on
+
+static INLINE void av1_set_ref_frame(MV_REFERENCE_FRAME *rf,
+ int8_t ref_frame_type) {
+ if (ref_frame_type >= REF_FRAMES) {
+ rf[0] = ref_frame_map[ref_frame_type - REF_FRAMES][0];
+ rf[1] = ref_frame_map[ref_frame_type - REF_FRAMES][1];
+ } else {
+ rf[0] = ref_frame_type;
+ rf[1] = NONE_FRAME;
+ assert(ref_frame_type > NONE_FRAME);
+ }
+}
+
+static uint16_t compound_mode_ctx_map[3][COMP_NEWMV_CTXS] = {
+ { 0, 1, 1, 1, 1 },
+ { 1, 2, 3, 4, 4 },
+ { 4, 4, 5, 6, 7 },
+};
+
+static INLINE int16_t av1_mode_context_analyzer(
+ const int16_t *const mode_context, const MV_REFERENCE_FRAME *const rf) {
+ const int8_t ref_frame = av1_ref_frame_type(rf);
+
+ if (rf[1] <= INTRA_FRAME) return mode_context[ref_frame];
+
+ const int16_t newmv_ctx = mode_context[ref_frame] & NEWMV_CTX_MASK;
+ const int16_t refmv_ctx =
+ (mode_context[ref_frame] >> REFMV_OFFSET) & REFMV_CTX_MASK;
+
+ const int16_t comp_ctx = compound_mode_ctx_map[refmv_ctx >> 1][AOMMIN(
+ newmv_ctx, COMP_NEWMV_CTXS - 1)];
+ return comp_ctx;
+}
+
+static INLINE uint8_t av1_drl_ctx(const CANDIDATE_MV *ref_mv_stack,
+ int ref_idx) {
+ if (ref_mv_stack[ref_idx].weight >= REF_CAT_LEVEL &&
+ ref_mv_stack[ref_idx + 1].weight >= REF_CAT_LEVEL)
+ return 0;
+
+ if (ref_mv_stack[ref_idx].weight >= REF_CAT_LEVEL &&
+ ref_mv_stack[ref_idx + 1].weight < REF_CAT_LEVEL)
+ return 1;
+
+ if (ref_mv_stack[ref_idx].weight < REF_CAT_LEVEL &&
+ ref_mv_stack[ref_idx + 1].weight < REF_CAT_LEVEL)
+ return 2;
+
+ return 0;
+}
+
+void av1_setup_frame_buf_refs(AV1_COMMON *cm);
+void av1_setup_frame_sign_bias(AV1_COMMON *cm);
+void av1_setup_skip_mode_allowed(AV1_COMMON *cm);
+void av1_setup_motion_field(AV1_COMMON *cm);
+void av1_set_frame_refs(AV1_COMMON *const cm, int lst_map_idx, int gld_map_idx);
+
+static INLINE void av1_collect_neighbors_ref_counts(MACROBLOCKD *const xd) {
+ av1_zero(xd->neighbors_ref_counts);
+
+ uint8_t *const ref_counts = xd->neighbors_ref_counts;
+
+ const MB_MODE_INFO *const above_mbmi = xd->above_mbmi;
+ const MB_MODE_INFO *const left_mbmi = xd->left_mbmi;
+ const int above_in_image = xd->up_available;
+ const int left_in_image = xd->left_available;
+
+ // Above neighbor
+ if (above_in_image && is_inter_block(above_mbmi)) {
+ ref_counts[above_mbmi->ref_frame[0]]++;
+ if (has_second_ref(above_mbmi)) {
+ ref_counts[above_mbmi->ref_frame[1]]++;
+ }
+ }
+
+ // Left neighbor
+ if (left_in_image && is_inter_block(left_mbmi)) {
+ ref_counts[left_mbmi->ref_frame[0]]++;
+ if (has_second_ref(left_mbmi)) {
+ ref_counts[left_mbmi->ref_frame[1]]++;
+ }
+ }
+}
+
+void av1_copy_frame_mvs(const AV1_COMMON *const cm,
+ const MB_MODE_INFO *const mi, int mi_row, int mi_col,
+ int x_mis, int y_mis);
+
+void av1_find_mv_refs(const AV1_COMMON *cm, const MACROBLOCKD *xd,
+ MB_MODE_INFO *mi, MV_REFERENCE_FRAME ref_frame,
+ uint8_t ref_mv_count[MODE_CTX_REF_FRAMES],
+ CANDIDATE_MV ref_mv_stack[][MAX_REF_MV_STACK_SIZE],
+ int_mv mv_ref_list[][MAX_MV_REF_CANDIDATES],
+ int_mv *global_mvs, int mi_row, int mi_col,
+ int16_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 av1_find_best_ref_mvs(int allow_hp, int_mv *mvlist, int_mv *nearest_mv,
+ int_mv *near_mv, int is_integer);
+
+int selectSamples(MV *mv, int *pts, int *pts_inref, int len, BLOCK_SIZE bsize);
+int findSamples(const AV1_COMMON *cm, MACROBLOCKD *xd, int mi_row, int mi_col,
+ int *pts, int *pts_inref);
+
+#define INTRABC_DELAY_PIXELS 256 // Delay of 256 pixels
+#define INTRABC_DELAY_SB64 (INTRABC_DELAY_PIXELS / 64)
+
+static INLINE void av1_find_ref_dv(int_mv *ref_dv, const TileInfo *const tile,
+ int mib_size, int mi_row, int mi_col) {
+ (void)mi_col;
+ if (mi_row - mib_size < tile->mi_row_start) {
+ ref_dv->as_mv.row = 0;
+ ref_dv->as_mv.col = -MI_SIZE * mib_size - INTRABC_DELAY_PIXELS;
+ } else {
+ ref_dv->as_mv.row = -MI_SIZE * mib_size;
+ ref_dv->as_mv.col = 0;
+ }
+ ref_dv->as_mv.row *= 8;
+ ref_dv->as_mv.col *= 8;
+}
+
+static INLINE int av1_is_dv_valid(const MV dv, const AV1_COMMON *cm,
+ const MACROBLOCKD *xd, int mi_row, int mi_col,
+ BLOCK_SIZE bsize, int mib_size_log2) {
+ const int bw = block_size_wide[bsize];
+ const int bh = block_size_high[bsize];
+ const int SCALE_PX_TO_MV = 8;
+ // Disallow subpixel for now
+ // SUBPEL_MASK is not the correct scale
+ if (((dv.row & (SCALE_PX_TO_MV - 1)) || (dv.col & (SCALE_PX_TO_MV - 1))))
+ return 0;
+
+ const TileInfo *const tile = &xd->tile;
+ // Is the source top-left inside the current tile?
+ const int src_top_edge = mi_row * MI_SIZE * SCALE_PX_TO_MV + dv.row;
+ const int tile_top_edge = tile->mi_row_start * MI_SIZE * SCALE_PX_TO_MV;
+ if (src_top_edge < tile_top_edge) return 0;
+ const int src_left_edge = mi_col * MI_SIZE * SCALE_PX_TO_MV + dv.col;
+ const int tile_left_edge = tile->mi_col_start * MI_SIZE * SCALE_PX_TO_MV;
+ if (src_left_edge < tile_left_edge) return 0;
+ // Is the bottom right inside the current tile?
+ const int src_bottom_edge = (mi_row * MI_SIZE + bh) * SCALE_PX_TO_MV + dv.row;
+ const int tile_bottom_edge = tile->mi_row_end * MI_SIZE * SCALE_PX_TO_MV;
+ if (src_bottom_edge > tile_bottom_edge) return 0;
+ const int src_right_edge = (mi_col * MI_SIZE + bw) * SCALE_PX_TO_MV + dv.col;
+ const int tile_right_edge = tile->mi_col_end * MI_SIZE * SCALE_PX_TO_MV;
+ if (src_right_edge > tile_right_edge) return 0;
+
+ // Special case for sub 8x8 chroma cases, to prevent referring to chroma
+ // pixels outside current tile.
+ for (int plane = 1; plane < av1_num_planes(cm); ++plane) {
+ const struct macroblockd_plane *const pd = &xd->plane[plane];
+ if (is_chroma_reference(mi_row, mi_col, bsize, pd->subsampling_x,
+ pd->subsampling_y)) {
+ if (bw < 8 && pd->subsampling_x)
+ if (src_left_edge < tile_left_edge + 4 * SCALE_PX_TO_MV) return 0;
+ if (bh < 8 && pd->subsampling_y)
+ if (src_top_edge < tile_top_edge + 4 * SCALE_PX_TO_MV) return 0;
+ }
+ }
+
+ // Is the bottom right within an already coded SB? Also consider additional
+ // constraints to facilitate HW decoder.
+ const int max_mib_size = 1 << mib_size_log2;
+ const int active_sb_row = mi_row >> mib_size_log2;
+ const int active_sb64_col = (mi_col * MI_SIZE) >> 6;
+ const int sb_size = max_mib_size * MI_SIZE;
+ const int src_sb_row = ((src_bottom_edge >> 3) - 1) / sb_size;
+ const int src_sb64_col = ((src_right_edge >> 3) - 1) >> 6;
+ const int total_sb64_per_row =
+ ((tile->mi_col_end - tile->mi_col_start - 1) >> 4) + 1;
+ const int active_sb64 = active_sb_row * total_sb64_per_row + active_sb64_col;
+ const int src_sb64 = src_sb_row * total_sb64_per_row + src_sb64_col;
+ if (src_sb64 >= active_sb64 - INTRABC_DELAY_SB64) return 0;
+
+ // Wavefront constraint: use only top left area of frame for reference.
+ const int gradient = 1 + INTRABC_DELAY_SB64 + (sb_size > 64);
+ const int wf_offset = gradient * (active_sb_row - src_sb_row);
+ if (src_sb_row > active_sb_row ||
+ src_sb64_col >= active_sb64_col - INTRABC_DELAY_SB64 + wf_offset)
+ return 0;
+
+ return 1;
+}
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // AOM_AV1_COMMON_MVREF_COMMON_H_
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