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| -rw-r--r-- | third_party/aom/av1/common/mvref_common.h | 342 |
1 files changed, 342 insertions, 0 deletions
diff --git a/third_party/aom/av1/common/mvref_common.h b/third_party/aom/av1/common/mvref_common.h new file mode 100644 index 0000000000..3ab784c1ed --- /dev/null +++ b/third_party/aom/av1/common/mvref_common.h @@ -0,0 +1,342 @@ +/* + * 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/av1_common_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 OrderHintInfo *oh, int a, int b) { + if (!oh->enable_order_hint) return 0; + + const int bits = oh->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) { + const SubpelMvLimits mv_limits = { + xd->mb_to_left_edge - GET_MV_SUBPEL(bw) - MV_BORDER, + xd->mb_to_right_edge + GET_MV_SUBPEL(bw) + MV_BORDER, + xd->mb_to_top_edge - GET_MV_SUBPEL(bh) - MV_BORDER, + xd->mb_to_bottom_edge + GET_MV_SUBPEL(bh) + MV_BORDER + }; + clamp_mv(mv, &mv_limits); +} + +static INLINE int_mv get_block_mv(const MB_MODE_INFO *candidate, int which_mv) { + return candidate->mv[which_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, + MV_REFERENCE_FRAME 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 { + assert(ref_frame_type > NONE_FRAME); + rf[0] = ref_frame_type; + rf[1] = 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 uint16_t *ref_mv_weight, int ref_idx) { + if (ref_mv_weight[ref_idx] >= REF_CAT_LEVEL && + ref_mv_weight[ref_idx + 1] >= REF_CAT_LEVEL) + return 0; + + if (ref_mv_weight[ref_idx] >= REF_CAT_LEVEL && + ref_mv_weight[ref_idx + 1] < REF_CAT_LEVEL) + return 1; + + if (ref_mv_weight[ref_idx] < REF_CAT_LEVEL && + ref_mv_weight[ref_idx + 1] < 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_calculate_ref_frame_side(AV1_COMMON *cm); +void av1_setup_motion_field(AV1_COMMON *cm); +void av1_set_frame_refs(AV1_COMMON *const cm, int *remapped_ref_idx, + 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); + +// The global_mvs output parameter points to an array of REF_FRAMES elements. +// The caller may pass a null global_mvs if it does not need the global_mvs +// output. +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], + uint16_t ref_mv_weight[][MAX_REF_MV_STACK_SIZE], + int_mv mv_ref_list[][MAX_MV_REF_CANDIDATES], + int_mv *global_mvs, 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); + +uint8_t av1_selectSamples(MV *mv, int *pts, int *pts_inref, int len, + BLOCK_SIZE bsize); +uint8_t av1_findSamples(const AV1_COMMON *cm, MACROBLOCKD *xd, 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) { + if (mi_row - mib_size < tile->mi_row_start) { + ref_dv->as_fullmv.row = 0; + ref_dv->as_fullmv.col = -MI_SIZE * mib_size - INTRABC_DELAY_PIXELS; + } else { + ref_dv->as_fullmv.row = -MI_SIZE * mib_size; + ref_dv->as_fullmv.col = 0; + } + convert_fullmv_to_mv(ref_dv); +} + +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. + if (xd->is_chroma_ref && av1_num_planes(cm) > 1) { + const struct macroblockd_plane *const pd = &xd->plane[1]; + 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_ |