blob: 7f24ab4e6ddc6545dbf1555892083d1ec3667394 [file] [log] [blame]
/*
* 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.
*/
#include <stdlib.h>
#include "av1/common/mvref_common.h"
#include "av1/common/warped_motion.h"
// Although we assign 32 bit integers, all the values are strictly under 14
// bits.
static int div_mult[32] = { 0, 16384, 8192, 5461, 4096, 3276, 2730, 2340,
2048, 1820, 1638, 1489, 1365, 1260, 1170, 1092,
1024, 963, 910, 862, 819, 780, 744, 712,
682, 655, 630, 606, 585, 564, 546, 528 };
// TODO(jingning): Consider the use of lookup table for (num / den)
// altogether.
static void get_mv_projection(MV *output, MV ref, int num, int den) {
den = AOMMIN(den, MAX_FRAME_DISTANCE);
num = num > 0 ? AOMMIN(num, MAX_FRAME_DISTANCE)
: AOMMAX(num, -MAX_FRAME_DISTANCE);
const int mv_row =
ROUND_POWER_OF_TWO_SIGNED(ref.row * num * div_mult[den], 14);
const int mv_col =
ROUND_POWER_OF_TWO_SIGNED(ref.col * num * div_mult[den], 14);
const int clamp_max = MV_UPP - 1;
const int clamp_min = MV_LOW + 1;
output->row = (int16_t)clamp(mv_row, clamp_min, clamp_max);
output->col = (int16_t)clamp(mv_col, clamp_min, clamp_max);
}
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) {
const int frame_mvs_stride = ROUND_POWER_OF_TWO(cm->mi_cols, 1);
MV_REF *frame_mvs =
cm->cur_frame->mvs + (mi_row >> 1) * frame_mvs_stride + (mi_col >> 1);
x_mis = ROUND_POWER_OF_TWO(x_mis, 1);
y_mis = ROUND_POWER_OF_TWO(y_mis, 1);
int w, h;
for (h = 0; h < y_mis; h++) {
MV_REF *mv = frame_mvs;
for (w = 0; w < x_mis; w++) {
mv->ref_frame = NONE_FRAME;
mv->mv.as_int = 0;
for (int idx = 0; idx < 2; ++idx) {
MV_REFERENCE_FRAME ref_frame = mi->ref_frame[idx];
if (ref_frame > INTRA_FRAME) {
int8_t ref_idx = cm->ref_frame_side[ref_frame];
if (ref_idx) continue;
if ((abs(mi->mv[idx].as_mv.row) > REFMVS_LIMIT) ||
(abs(mi->mv[idx].as_mv.col) > REFMVS_LIMIT))
continue;
mv->ref_frame = ref_frame;
mv->mv.as_int = mi->mv[idx].as_int;
}
}
mv++;
}
frame_mvs += frame_mvs_stride;
}
}
static void add_ref_mv_candidate(
const MB_MODE_INFO *const candidate, const MV_REFERENCE_FRAME rf[2],
uint8_t *refmv_count, uint8_t *ref_match_count, uint8_t *newmv_count,
CANDIDATE_MV *ref_mv_stack, int_mv *gm_mv_candidates,
const WarpedMotionParams *gm_params, int col, int weight) {
if (!is_inter_block(candidate)) return; // for intrabc
int index = 0, ref;
assert(weight % 2 == 0);
if (rf[1] == NONE_FRAME) {
// single reference frame
for (ref = 0; ref < 2; ++ref) {
if (candidate->ref_frame[ref] == rf[0]) {
int_mv this_refmv;
if (is_global_mv_block(candidate, gm_params[rf[0]].wmtype))
this_refmv = gm_mv_candidates[0];
else
this_refmv = get_sub_block_mv(candidate, ref, col);
for (index = 0; index < *refmv_count; ++index)
if (ref_mv_stack[index].this_mv.as_int == this_refmv.as_int) break;
if (index < *refmv_count) ref_mv_stack[index].weight += weight;
// Add a new item to the list.
if (index == *refmv_count && *refmv_count < MAX_REF_MV_STACK_SIZE) {
ref_mv_stack[index].this_mv = this_refmv;
ref_mv_stack[index].weight = weight;
++(*refmv_count);
}
if (have_newmv_in_inter_mode(candidate->mode)) ++*newmv_count;
++*ref_match_count;
}
}
} else {
// compound reference frame
if (candidate->ref_frame[0] == rf[0] && candidate->ref_frame[1] == rf[1]) {
int_mv this_refmv[2];
for (ref = 0; ref < 2; ++ref) {
if (is_global_mv_block(candidate, gm_params[rf[ref]].wmtype))
this_refmv[ref] = gm_mv_candidates[ref];
else
this_refmv[ref] = get_sub_block_mv(candidate, ref, col);
}
for (index = 0; index < *refmv_count; ++index)
if ((ref_mv_stack[index].this_mv.as_int == this_refmv[0].as_int) &&
(ref_mv_stack[index].comp_mv.as_int == this_refmv[1].as_int))
break;
if (index < *refmv_count) ref_mv_stack[index].weight += weight;
// Add a new item to the list.
if (index == *refmv_count && *refmv_count < MAX_REF_MV_STACK_SIZE) {
ref_mv_stack[index].this_mv = this_refmv[0];
ref_mv_stack[index].comp_mv = this_refmv[1];
ref_mv_stack[index].weight = weight;
++(*refmv_count);
}
if (have_newmv_in_inter_mode(candidate->mode)) ++*newmv_count;
++*ref_match_count;
}
}
}
static void scan_row_mbmi(const AV1_COMMON *cm, const MACROBLOCKD *xd,
int mi_row, int mi_col,
const MV_REFERENCE_FRAME rf[2], int row_offset,
CANDIDATE_MV *ref_mv_stack, uint8_t *refmv_count,
uint8_t *ref_match_count, uint8_t *newmv_count,
int_mv *gm_mv_candidates, int max_row_offset,
int *processed_rows) {
int end_mi = AOMMIN(xd->n4_w, cm->mi_cols - mi_col);
end_mi = AOMMIN(end_mi, mi_size_wide[BLOCK_64X64]);
const int n8_w_8 = mi_size_wide[BLOCK_8X8];
const int n8_w_16 = mi_size_wide[BLOCK_16X16];
int i;
int col_offset = 0;
// TODO(jingning): Revisit this part after cb4x4 is stable.
if (abs(row_offset) > 1) {
col_offset = 1;
if ((mi_col & 0x01) && xd->n4_w < n8_w_8) --col_offset;
}
const int use_step_16 = (xd->n4_w >= 16);
MB_MODE_INFO **const candidate_mi0 = xd->mi + row_offset * xd->mi_stride;
(void)mi_row;
for (i = 0; i < end_mi;) {
const MB_MODE_INFO *const candidate = candidate_mi0[col_offset + i];
const int candidate_bsize = candidate->sb_type;
const int n4_w = mi_size_wide[candidate_bsize];
int len = AOMMIN(xd->n4_w, n4_w);
if (use_step_16)
len = AOMMAX(n8_w_16, len);
else if (abs(row_offset) > 1)
len = AOMMAX(len, n8_w_8);
int weight = 2;
if (xd->n4_w >= n8_w_8 && xd->n4_w <= n4_w) {
int inc = AOMMIN(-max_row_offset + row_offset + 1,
mi_size_high[candidate_bsize]);
// Obtain range used in weight calculation.
weight = AOMMAX(weight, inc);
// Update processed rows.
*processed_rows = inc - row_offset - 1;
}
add_ref_mv_candidate(candidate, rf, refmv_count, ref_match_count,
newmv_count, ref_mv_stack, gm_mv_candidates,
cm->global_motion, col_offset + i, len * weight);
i += len;
}
}
static void scan_col_mbmi(const AV1_COMMON *cm, const MACROBLOCKD *xd,
int mi_row, int mi_col,
const MV_REFERENCE_FRAME rf[2], int col_offset,
CANDIDATE_MV *ref_mv_stack, uint8_t *refmv_count,
uint8_t *ref_match_count, uint8_t *newmv_count,
int_mv *gm_mv_candidates, int max_col_offset,
int *processed_cols) {
int end_mi = AOMMIN(xd->n4_h, cm->mi_rows - mi_row);
end_mi = AOMMIN(end_mi, mi_size_high[BLOCK_64X64]);
const int n8_h_8 = mi_size_high[BLOCK_8X8];
const int n8_h_16 = mi_size_high[BLOCK_16X16];
int i;
int row_offset = 0;
if (abs(col_offset) > 1) {
row_offset = 1;
if ((mi_row & 0x01) && xd->n4_h < n8_h_8) --row_offset;
}
const int use_step_16 = (xd->n4_h >= 16);
(void)mi_col;
for (i = 0; i < end_mi;) {
const MB_MODE_INFO *const candidate =
xd->mi[(row_offset + i) * xd->mi_stride + col_offset];
const int candidate_bsize = candidate->sb_type;
const int n4_h = mi_size_high[candidate_bsize];
int len = AOMMIN(xd->n4_h, n4_h);
if (use_step_16)
len = AOMMAX(n8_h_16, len);
else if (abs(col_offset) > 1)
len = AOMMAX(len, n8_h_8);
int weight = 2;
if (xd->n4_h >= n8_h_8 && xd->n4_h <= n4_h) {
int inc = AOMMIN(-max_col_offset + col_offset + 1,
mi_size_wide[candidate_bsize]);
// Obtain range used in weight calculation.
weight = AOMMAX(weight, inc);
// Update processed cols.
*processed_cols = inc - col_offset - 1;
}
add_ref_mv_candidate(candidate, rf, refmv_count, ref_match_count,
newmv_count, ref_mv_stack, gm_mv_candidates,
cm->global_motion, col_offset, len * weight);
i += len;
}
}
static void scan_blk_mbmi(const AV1_COMMON *cm, const MACROBLOCKD *xd,
const int mi_row, const int mi_col,
const MV_REFERENCE_FRAME rf[2], int row_offset,
int col_offset, CANDIDATE_MV *ref_mv_stack,
uint8_t *ref_match_count, uint8_t *newmv_count,
int_mv *gm_mv_candidates,
uint8_t refmv_count[MODE_CTX_REF_FRAMES]) {
const TileInfo *const tile = &xd->tile;
POSITION mi_pos;
mi_pos.row = row_offset;
mi_pos.col = col_offset;
if (is_inside(tile, mi_col, mi_row, &mi_pos)) {
const MB_MODE_INFO *const candidate =
xd->mi[mi_pos.row * xd->mi_stride + mi_pos.col];
const int len = mi_size_wide[BLOCK_8X8];
add_ref_mv_candidate(candidate, rf, refmv_count, ref_match_count,
newmv_count, ref_mv_stack, gm_mv_candidates,
cm->global_motion, mi_pos.col, 2 * len);
} // Analyze a single 8x8 block motion information.
}
static int has_top_right(const AV1_COMMON *cm, const MACROBLOCKD *xd,
int mi_row, int mi_col, int bs) {
const int sb_mi_size = mi_size_wide[cm->seq_params.sb_size];
const int mask_row = mi_row & (sb_mi_size - 1);
const int mask_col = mi_col & (sb_mi_size - 1);
if (bs > mi_size_wide[BLOCK_64X64]) return 0;
// In a split partition all apart from the bottom right has a top right
int has_tr = !((mask_row & bs) && (mask_col & bs));
// bs > 0 and bs is a power of 2
assert(bs > 0 && !(bs & (bs - 1)));
// For each 4x4 group of blocks, when the bottom right is decoded the blocks
// to the right have not been decoded therefore the bottom right does
// not have a top right
while (bs < sb_mi_size) {
if (mask_col & bs) {
if ((mask_col & (2 * bs)) && (mask_row & (2 * bs))) {
has_tr = 0;
break;
}
} else {
break;
}
bs <<= 1;
}
// The left hand of two vertical rectangles always has a top right (as the
// block above will have been decoded)
if (xd->n4_w < xd->n4_h)
if (!xd->is_sec_rect) has_tr = 1;
// The bottom of two horizontal rectangles never has a top right (as the block
// to the right won't have been decoded)
if (xd->n4_w > xd->n4_h)
if (xd->is_sec_rect) has_tr = 0;
// The bottom left square of a Vertical A (in the old format) does
// not have a top right as it is decoded before the right hand
// rectangle of the partition
if (xd->mi[0]->partition == PARTITION_VERT_A) {
if (xd->n4_w == xd->n4_h)
if (mask_row & bs) has_tr = 0;
}
return has_tr;
}
static int check_sb_border(const int mi_row, const int mi_col,
const int row_offset, const int col_offset) {
const int sb_mi_size = mi_size_wide[BLOCK_64X64];
const int row = mi_row & (sb_mi_size - 1);
const int col = mi_col & (sb_mi_size - 1);
if (row + row_offset < 0 || row + row_offset >= sb_mi_size ||
col + col_offset < 0 || col + col_offset >= sb_mi_size)
return 0;
return 1;
}
static int add_tpl_ref_mv(const AV1_COMMON *cm, const MACROBLOCKD *xd,
int mi_row, int mi_col, MV_REFERENCE_FRAME ref_frame,
int blk_row, int blk_col, int_mv *gm_mv_candidates,
uint8_t refmv_count[MODE_CTX_REF_FRAMES],
CANDIDATE_MV ref_mv_stacks[][MAX_REF_MV_STACK_SIZE],
int16_t *mode_context) {
POSITION mi_pos;
int idx;
const int weight_unit = 1; // mi_size_wide[BLOCK_8X8];
mi_pos.row = (mi_row & 0x01) ? blk_row : blk_row + 1;
mi_pos.col = (mi_col & 0x01) ? blk_col : blk_col + 1;
if (!is_inside(&xd->tile, mi_col, mi_row, &mi_pos)) return 0;
const TPL_MV_REF *prev_frame_mvs =
cm->tpl_mvs + ((mi_row + mi_pos.row) >> 1) * (cm->mi_stride >> 1) +
((mi_col + mi_pos.col) >> 1);
MV_REFERENCE_FRAME rf[2];
av1_set_ref_frame(rf, ref_frame);
if (rf[1] == NONE_FRAME) {
int cur_frame_index = cm->cur_frame->cur_frame_offset;
int buf_idx_0 = cm->frame_refs[FWD_RF_OFFSET(rf[0])].idx;
int frame0_index = cm->buffer_pool->frame_bufs[buf_idx_0].cur_frame_offset;
int cur_offset_0 = get_relative_dist(cm, cur_frame_index, frame0_index);
CANDIDATE_MV *ref_mv_stack = ref_mv_stacks[rf[0]];
if (prev_frame_mvs->mfmv0.as_int != INVALID_MV) {
int_mv this_refmv;
get_mv_projection(&this_refmv.as_mv, prev_frame_mvs->mfmv0.as_mv,
cur_offset_0, prev_frame_mvs->ref_frame_offset);
lower_mv_precision(&this_refmv.as_mv, cm->allow_high_precision_mv,
cm->cur_frame_force_integer_mv);
if (blk_row == 0 && blk_col == 0)
if (abs(this_refmv.as_mv.row - gm_mv_candidates[0].as_mv.row) >= 16 ||
abs(this_refmv.as_mv.col - gm_mv_candidates[0].as_mv.col) >= 16)
mode_context[ref_frame] |= (1 << GLOBALMV_OFFSET);
for (idx = 0; idx < refmv_count[rf[0]]; ++idx)
if (this_refmv.as_int == ref_mv_stack[idx].this_mv.as_int) break;
if (idx < refmv_count[rf[0]]) ref_mv_stack[idx].weight += 2 * weight_unit;
if (idx == refmv_count[rf[0]] &&
refmv_count[rf[0]] < MAX_REF_MV_STACK_SIZE) {
ref_mv_stack[idx].this_mv.as_int = this_refmv.as_int;
ref_mv_stack[idx].weight = 2 * weight_unit;
++(refmv_count[rf[0]]);
}
return 1;
}
} else {
// Process compound inter mode
int cur_frame_index = cm->cur_frame->cur_frame_offset;
int buf_idx_0 = cm->frame_refs[FWD_RF_OFFSET(rf[0])].idx;
int frame0_index = cm->buffer_pool->frame_bufs[buf_idx_0].cur_frame_offset;
int cur_offset_0 = get_relative_dist(cm, cur_frame_index, frame0_index);
int buf_idx_1 = cm->frame_refs[FWD_RF_OFFSET(rf[1])].idx;
int frame1_index = cm->buffer_pool->frame_bufs[buf_idx_1].cur_frame_offset;
int cur_offset_1 = get_relative_dist(cm, cur_frame_index, frame1_index);
CANDIDATE_MV *ref_mv_stack = ref_mv_stacks[ref_frame];
if (prev_frame_mvs->mfmv0.as_int != INVALID_MV) {
int_mv this_refmv;
int_mv comp_refmv;
get_mv_projection(&this_refmv.as_mv, prev_frame_mvs->mfmv0.as_mv,
cur_offset_0, prev_frame_mvs->ref_frame_offset);
get_mv_projection(&comp_refmv.as_mv, prev_frame_mvs->mfmv0.as_mv,
cur_offset_1, prev_frame_mvs->ref_frame_offset);
lower_mv_precision(&this_refmv.as_mv, cm->allow_high_precision_mv,
cm->cur_frame_force_integer_mv);
lower_mv_precision(&comp_refmv.as_mv, cm->allow_high_precision_mv,
cm->cur_frame_force_integer_mv);
if (blk_row == 0 && blk_col == 0)
if (abs(this_refmv.as_mv.row - gm_mv_candidates[0].as_mv.row) >= 16 ||
abs(this_refmv.as_mv.col - gm_mv_candidates[0].as_mv.col) >= 16 ||
abs(comp_refmv.as_mv.row - gm_mv_candidates[1].as_mv.row) >= 16 ||
abs(comp_refmv.as_mv.col - gm_mv_candidates[1].as_mv.col) >= 16)
mode_context[ref_frame] |= (1 << GLOBALMV_OFFSET);
for (idx = 0; idx < refmv_count[ref_frame]; ++idx)
if (this_refmv.as_int == ref_mv_stack[idx].this_mv.as_int &&
comp_refmv.as_int == ref_mv_stack[idx].comp_mv.as_int)
break;
if (idx < refmv_count[ref_frame])
ref_mv_stack[idx].weight += 2 * weight_unit;
if (idx == refmv_count[ref_frame] &&
refmv_count[ref_frame] < MAX_REF_MV_STACK_SIZE) {
ref_mv_stack[idx].this_mv.as_int = this_refmv.as_int;
ref_mv_stack[idx].comp_mv.as_int = comp_refmv.as_int;
ref_mv_stack[idx].weight = 2 * weight_unit;
++(refmv_count[ref_frame]);
}
return 1;
}
}
return 0;
}
static void process_compound_ref_mv_candidate(
const MB_MODE_INFO *const candidate, const AV1_COMMON *const cm,
const MV_REFERENCE_FRAME *const rf, int_mv ref_id[2][2],
int ref_id_count[2], int_mv ref_diff[2][2], int ref_diff_count[2]) {
for (int rf_idx = 0; rf_idx < 2; ++rf_idx) {
MV_REFERENCE_FRAME can_rf = candidate->ref_frame[rf_idx];
for (int cmp_idx = 0; cmp_idx < 2; ++cmp_idx) {
if (can_rf == rf[cmp_idx] && ref_id_count[cmp_idx] < 2) {
ref_id[cmp_idx][ref_id_count[cmp_idx]] = candidate->mv[rf_idx];
++ref_id_count[cmp_idx];
} else if (can_rf > INTRA_FRAME && ref_diff_count[cmp_idx] < 2) {
int_mv this_mv = candidate->mv[rf_idx];
if (cm->ref_frame_sign_bias[can_rf] !=
cm->ref_frame_sign_bias[rf[cmp_idx]]) {
this_mv.as_mv.row = -this_mv.as_mv.row;
this_mv.as_mv.col = -this_mv.as_mv.col;
}
ref_diff[cmp_idx][ref_diff_count[cmp_idx]] = this_mv;
++ref_diff_count[cmp_idx];
}
}
}
}
static void process_single_ref_mv_candidate(
const MB_MODE_INFO *const candidate, const AV1_COMMON *const cm,
MV_REFERENCE_FRAME ref_frame, uint8_t refmv_count[MODE_CTX_REF_FRAMES],
CANDIDATE_MV ref_mv_stack[][MAX_REF_MV_STACK_SIZE]) {
for (int rf_idx = 0; rf_idx < 2; ++rf_idx) {
if (candidate->ref_frame[rf_idx] > INTRA_FRAME) {
int_mv this_mv = candidate->mv[rf_idx];
if (cm->ref_frame_sign_bias[candidate->ref_frame[rf_idx]] !=
cm->ref_frame_sign_bias[ref_frame]) {
this_mv.as_mv.row = -this_mv.as_mv.row;
this_mv.as_mv.col = -this_mv.as_mv.col;
}
int stack_idx;
for (stack_idx = 0; stack_idx < refmv_count[ref_frame]; ++stack_idx) {
const int_mv stack_mv = ref_mv_stack[ref_frame][stack_idx].this_mv;
if (this_mv.as_int == stack_mv.as_int) break;
}
if (stack_idx == refmv_count[ref_frame]) {
ref_mv_stack[ref_frame][stack_idx].this_mv = this_mv;
// TODO(jingning): Set an arbitrary small number here. The weight
// doesn't matter as long as it is properly initialized.
ref_mv_stack[ref_frame][stack_idx].weight = 2;
++refmv_count[ref_frame];
}
}
}
}
static void setup_ref_mv_list(
const AV1_COMMON *cm, const MACROBLOCKD *xd, MV_REFERENCE_FRAME ref_frame,
uint8_t refmv_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 *gm_mv_candidates,
int mi_row, int mi_col, int16_t *mode_context) {
const int bs = AOMMAX(xd->n4_w, xd->n4_h);
const int has_tr = has_top_right(cm, xd, mi_row, mi_col, bs);
MV_REFERENCE_FRAME rf[2];
const TileInfo *const tile = &xd->tile;
int max_row_offset = 0, max_col_offset = 0;
const int row_adj = (xd->n4_h < mi_size_high[BLOCK_8X8]) && (mi_row & 0x01);
const int col_adj = (xd->n4_w < mi_size_wide[BLOCK_8X8]) && (mi_col & 0x01);
int processed_rows = 0;
int processed_cols = 0;
av1_set_ref_frame(rf, ref_frame);
mode_context[ref_frame] = 0;
refmv_count[ref_frame] = 0;
// Find valid maximum row/col offset.
if (xd->up_available) {
max_row_offset = -(MVREF_ROW_COLS << 1) + row_adj;
if (xd->n4_h < mi_size_high[BLOCK_8X8])
max_row_offset = -(2 << 1) + row_adj;
max_row_offset = find_valid_row_offset(tile, mi_row, max_row_offset);
}
if (xd->left_available) {
max_col_offset = -(MVREF_ROW_COLS << 1) + col_adj;
if (xd->n4_w < mi_size_wide[BLOCK_8X8])
max_col_offset = -(2 << 1) + col_adj;
max_col_offset = find_valid_col_offset(tile, mi_col, max_col_offset);
}
uint8_t col_match_count = 0;
uint8_t row_match_count = 0;
uint8_t newmv_count = 0;
// Scan the first above row mode info. row_offset = -1;
if (abs(max_row_offset) >= 1)
scan_row_mbmi(cm, xd, mi_row, mi_col, rf, -1, ref_mv_stack[ref_frame],
&refmv_count[ref_frame], &row_match_count, &newmv_count,
gm_mv_candidates, max_row_offset, &processed_rows);
// Scan the first left column mode info. col_offset = -1;
if (abs(max_col_offset) >= 1)
scan_col_mbmi(cm, xd, mi_row, mi_col, rf, -1, ref_mv_stack[ref_frame],
&refmv_count[ref_frame], &col_match_count, &newmv_count,
gm_mv_candidates, max_col_offset, &processed_cols);
// Check top-right boundary
if (has_tr)
scan_blk_mbmi(cm, xd, mi_row, mi_col, rf, -1, xd->n4_w,
ref_mv_stack[ref_frame], &row_match_count, &newmv_count,
gm_mv_candidates, &refmv_count[ref_frame]);
const uint8_t nearest_match = (row_match_count > 0) + (col_match_count > 0);
const uint8_t nearest_refmv_count = refmv_count[ref_frame];
// TODO(yunqing): for comp_search, do it for all 3 cases.
for (int idx = 0; idx < nearest_refmv_count; ++idx)
ref_mv_stack[ref_frame][idx].weight += REF_CAT_LEVEL;
if (cm->allow_ref_frame_mvs) {
int is_available = 0;
const int voffset = AOMMAX(mi_size_high[BLOCK_8X8], xd->n4_h);
const int hoffset = AOMMAX(mi_size_wide[BLOCK_8X8], xd->n4_w);
const int blk_row_end = AOMMIN(xd->n4_h, mi_size_high[BLOCK_64X64]);
const int blk_col_end = AOMMIN(xd->n4_w, mi_size_wide[BLOCK_64X64]);
const int tpl_sample_pos[3][2] = {
{ voffset, -2 },
{ voffset, hoffset },
{ voffset - 2, hoffset },
};
const int allow_extension = (xd->n4_h >= mi_size_high[BLOCK_8X8]) &&
(xd->n4_h < mi_size_high[BLOCK_64X64]) &&
(xd->n4_w >= mi_size_wide[BLOCK_8X8]) &&
(xd->n4_w < mi_size_wide[BLOCK_64X64]);
const int step_h = (xd->n4_h >= mi_size_high[BLOCK_64X64])
? mi_size_high[BLOCK_16X16]
: mi_size_high[BLOCK_8X8];
const int step_w = (xd->n4_w >= mi_size_wide[BLOCK_64X64])
? mi_size_wide[BLOCK_16X16]
: mi_size_wide[BLOCK_8X8];
for (int blk_row = 0; blk_row < blk_row_end; blk_row += step_h) {
for (int blk_col = 0; blk_col < blk_col_end; blk_col += step_w) {
int ret = add_tpl_ref_mv(cm, xd, mi_row, mi_col, ref_frame, blk_row,
blk_col, gm_mv_candidates, refmv_count,
ref_mv_stack, mode_context);
if (blk_row == 0 && blk_col == 0) is_available = ret;
}
}
if (is_available == 0) mode_context[ref_frame] |= (1 << GLOBALMV_OFFSET);
for (int i = 0; i < 3 && allow_extension; ++i) {
const int blk_row = tpl_sample_pos[i][0];
const int blk_col = tpl_sample_pos[i][1];
if (!check_sb_border(mi_row, mi_col, blk_row, blk_col)) continue;
add_tpl_ref_mv(cm, xd, mi_row, mi_col, ref_frame, blk_row, blk_col,
gm_mv_candidates, refmv_count, ref_mv_stack, mode_context);
}
}
uint8_t dummy_newmv_count = 0;
// Scan the second outer area.
scan_blk_mbmi(cm, xd, mi_row, mi_col, rf, -1, -1, ref_mv_stack[ref_frame],
&row_match_count, &dummy_newmv_count, gm_mv_candidates,
&refmv_count[ref_frame]);
for (int idx = 2; idx <= MVREF_ROW_COLS; ++idx) {
const int row_offset = -(idx << 1) + 1 + row_adj;
const int col_offset = -(idx << 1) + 1 + col_adj;
if (abs(row_offset) <= abs(max_row_offset) &&
abs(row_offset) > processed_rows)
scan_row_mbmi(cm, xd, mi_row, mi_col, rf, row_offset,
ref_mv_stack[ref_frame], &refmv_count[ref_frame],
&row_match_count, &dummy_newmv_count, gm_mv_candidates,
max_row_offset, &processed_rows);
if (abs(col_offset) <= abs(max_col_offset) &&
abs(col_offset) > processed_cols)
scan_col_mbmi(cm, xd, mi_row, mi_col, rf, col_offset,
ref_mv_stack[ref_frame], &refmv_count[ref_frame],
&col_match_count, &dummy_newmv_count, gm_mv_candidates,
max_col_offset, &processed_cols);
}
const uint8_t ref_match_count = (row_match_count > 0) + (col_match_count > 0);
switch (nearest_match) {
case 0:
mode_context[ref_frame] |= 0;
if (ref_match_count >= 1) mode_context[ref_frame] |= 1;
if (ref_match_count == 1)
mode_context[ref_frame] |= (1 << REFMV_OFFSET);
else if (ref_match_count >= 2)
mode_context[ref_frame] |= (2 << REFMV_OFFSET);
break;
case 1:
mode_context[ref_frame] |= (newmv_count > 0) ? 2 : 3;
if (ref_match_count == 1)
mode_context[ref_frame] |= (3 << REFMV_OFFSET);
else if (ref_match_count >= 2)
mode_context[ref_frame] |= (4 << REFMV_OFFSET);
break;
case 2:
default:
if (newmv_count >= 1)
mode_context[ref_frame] |= 4;
else
mode_context[ref_frame] |= 5;
mode_context[ref_frame] |= (5 << REFMV_OFFSET);
break;
}
// Rank the likelihood and assign nearest and near mvs.
int len = nearest_refmv_count;
while (len > 0) {
int nr_len = 0;
for (int idx = 1; idx < len; ++idx) {
if (ref_mv_stack[ref_frame][idx - 1].weight <
ref_mv_stack[ref_frame][idx].weight) {
CANDIDATE_MV tmp_mv = ref_mv_stack[ref_frame][idx - 1];
ref_mv_stack[ref_frame][idx - 1] = ref_mv_stack[ref_frame][idx];
ref_mv_stack[ref_frame][idx] = tmp_mv;
nr_len = idx;
}
}
len = nr_len;
}
len = refmv_count[ref_frame];
while (len > nearest_refmv_count) {
int nr_len = nearest_refmv_count;
for (int idx = nearest_refmv_count + 1; idx < len; ++idx) {
if (ref_mv_stack[ref_frame][idx - 1].weight <
ref_mv_stack[ref_frame][idx].weight) {
CANDIDATE_MV tmp_mv = ref_mv_stack[ref_frame][idx - 1];
ref_mv_stack[ref_frame][idx - 1] = ref_mv_stack[ref_frame][idx];
ref_mv_stack[ref_frame][idx] = tmp_mv;
nr_len = idx;
}
}
len = nr_len;
}
if (rf[1] > NONE_FRAME) {
// TODO(jingning, yunqing): Refactor and consolidate the compound and
// single reference frame modes. Reduce unnecessary redundancy.
if (refmv_count[ref_frame] < MAX_MV_REF_CANDIDATES) {
int_mv ref_id[2][2], ref_diff[2][2];
int ref_id_count[2] = { 0 }, ref_diff_count[2] = { 0 };
int mi_width = AOMMIN(mi_size_wide[BLOCK_64X64], xd->n4_w);
mi_width = AOMMIN(mi_width, cm->mi_cols - mi_col);
int mi_height = AOMMIN(mi_size_high[BLOCK_64X64], xd->n4_h);
mi_height = AOMMIN(mi_height, cm->mi_rows - mi_row);
int mi_size = AOMMIN(mi_width, mi_height);
for (int idx = 0; abs(max_row_offset) >= 1 && idx < mi_size;) {
const MB_MODE_INFO *const candidate = xd->mi[-xd->mi_stride + idx];
process_compound_ref_mv_candidate(
candidate, cm, rf, ref_id, ref_id_count, ref_diff, ref_diff_count);
idx += mi_size_wide[candidate->sb_type];
}
for (int idx = 0; abs(max_col_offset) >= 1 && idx < mi_size;) {
const MB_MODE_INFO *const candidate = xd->mi[idx * xd->mi_stride - 1];
process_compound_ref_mv_candidate(
candidate, cm, rf, ref_id, ref_id_count, ref_diff, ref_diff_count);
idx += mi_size_high[candidate->sb_type];
}
// Build up the compound mv predictor
int_mv comp_list[3][2];
for (int idx = 0; idx < 2; ++idx) {
int comp_idx = 0;
for (int list_idx = 0; list_idx < ref_id_count[idx] && comp_idx < 2;
++list_idx, ++comp_idx)
comp_list[comp_idx][idx] = ref_id[idx][list_idx];
for (int list_idx = 0; list_idx < ref_diff_count[idx] && comp_idx < 2;
++list_idx, ++comp_idx)
comp_list[comp_idx][idx] = ref_diff[idx][list_idx];
for (; comp_idx < 3; ++comp_idx)
comp_list[comp_idx][idx] = gm_mv_candidates[idx];
}
if (refmv_count[ref_frame]) {
assert(refmv_count[ref_frame] == 1);
if (comp_list[0][0].as_int ==
ref_mv_stack[ref_frame][0].this_mv.as_int &&
comp_list[0][1].as_int ==
ref_mv_stack[ref_frame][0].comp_mv.as_int) {
ref_mv_stack[ref_frame][refmv_count[ref_frame]].this_mv =
comp_list[1][0];
ref_mv_stack[ref_frame][refmv_count[ref_frame]].comp_mv =
comp_list[1][1];
} else {
ref_mv_stack[ref_frame][refmv_count[ref_frame]].this_mv =
comp_list[0][0];
ref_mv_stack[ref_frame][refmv_count[ref_frame]].comp_mv =
comp_list[0][1];
}
ref_mv_stack[ref_frame][refmv_count[ref_frame]].weight = 2;
++refmv_count[ref_frame];
} else {
for (int idx = 0; idx < MAX_MV_REF_CANDIDATES; ++idx) {
ref_mv_stack[ref_frame][refmv_count[ref_frame]].this_mv =
comp_list[idx][0];
ref_mv_stack[ref_frame][refmv_count[ref_frame]].comp_mv =
comp_list[idx][1];
ref_mv_stack[ref_frame][refmv_count[ref_frame]].weight = 2;
++refmv_count[ref_frame];
}
}
}
assert(refmv_count[ref_frame] >= 2);
for (int idx = 0; idx < refmv_count[ref_frame]; ++idx) {
clamp_mv_ref(&ref_mv_stack[ref_frame][idx].this_mv.as_mv,
xd->n4_w << MI_SIZE_LOG2, xd->n4_h << MI_SIZE_LOG2, xd);
clamp_mv_ref(&ref_mv_stack[ref_frame][idx].comp_mv.as_mv,
xd->n4_w << MI_SIZE_LOG2, xd->n4_h << MI_SIZE_LOG2, xd);
}
} else {
// Handle single reference frame extension
int mi_width = AOMMIN(mi_size_wide[BLOCK_64X64], xd->n4_w);
mi_width = AOMMIN(mi_width, cm->mi_cols - mi_col);
int mi_height = AOMMIN(mi_size_high[BLOCK_64X64], xd->n4_h);
mi_height = AOMMIN(mi_height, cm->mi_rows - mi_row);
int mi_size = AOMMIN(mi_width, mi_height);
for (int idx = 0; abs(max_row_offset) >= 1 && idx < mi_size &&
refmv_count[ref_frame] < MAX_MV_REF_CANDIDATES;) {
const MB_MODE_INFO *const candidate = xd->mi[-xd->mi_stride + idx];
process_single_ref_mv_candidate(candidate, cm, ref_frame, refmv_count,
ref_mv_stack);
idx += mi_size_wide[candidate->sb_type];
}
for (int idx = 0; abs(max_col_offset) >= 1 && idx < mi_size &&
refmv_count[ref_frame] < MAX_MV_REF_CANDIDATES;) {
const MB_MODE_INFO *const candidate = xd->mi[idx * xd->mi_stride - 1];
process_single_ref_mv_candidate(candidate, cm, ref_frame, refmv_count,
ref_mv_stack);
idx += mi_size_high[candidate->sb_type];
}
for (int idx = 0; idx < refmv_count[ref_frame]; ++idx) {
clamp_mv_ref(&ref_mv_stack[ref_frame][idx].this_mv.as_mv,
xd->n4_w << MI_SIZE_LOG2, xd->n4_h << MI_SIZE_LOG2, xd);
}
if (mv_ref_list != NULL) {
for (int idx = refmv_count[ref_frame]; idx < MAX_MV_REF_CANDIDATES; ++idx)
mv_ref_list[rf[0]][idx].as_int = gm_mv_candidates[0].as_int;
for (int idx = 0;
idx < AOMMIN(MAX_MV_REF_CANDIDATES, refmv_count[ref_frame]); ++idx) {
mv_ref_list[rf[0]][idx].as_int =
ref_mv_stack[ref_frame][idx].this_mv.as_int;
}
}
}
}
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) {
int_mv zeromv[2];
BLOCK_SIZE bsize = mi->sb_type;
MV_REFERENCE_FRAME rf[2];
av1_set_ref_frame(rf, ref_frame);
if (ref_frame < REF_FRAMES) {
if (ref_frame != INTRA_FRAME) {
global_mvs[ref_frame] = gm_get_motion_vector(
&cm->global_motion[ref_frame], cm->allow_high_precision_mv, bsize,
mi_col, mi_row, cm->cur_frame_force_integer_mv);
} else {
global_mvs[ref_frame].as_int = INVALID_MV;
}
}
if (ref_frame != INTRA_FRAME) {
zeromv[0].as_int =
gm_get_motion_vector(&cm->global_motion[rf[0]],
cm->allow_high_precision_mv, bsize, mi_col, mi_row,
cm->cur_frame_force_integer_mv)
.as_int;
zeromv[1].as_int =
(rf[1] != NONE_FRAME)
? gm_get_motion_vector(&cm->global_motion[rf[1]],
cm->allow_high_precision_mv, bsize, mi_col,
mi_row, cm->cur_frame_force_integer_mv)
.as_int
: 0;
} else {
zeromv[0].as_int = zeromv[1].as_int = 0;
}
setup_ref_mv_list(cm, xd, ref_frame, ref_mv_count, ref_mv_stack, mv_ref_list,
zeromv, mi_row, mi_col, mode_context);
}
void av1_find_best_ref_mvs(int allow_hp, int_mv *mvlist, int_mv *nearest_mv,
int_mv *near_mv, int is_integer) {
int i;
// Make sure all the candidates are properly clamped etc
for (i = 0; i < MAX_MV_REF_CANDIDATES; ++i) {
lower_mv_precision(&mvlist[i].as_mv, allow_hp, is_integer);
}
*nearest_mv = mvlist[0];
*near_mv = mvlist[1];
}
void av1_setup_frame_buf_refs(AV1_COMMON *cm) {
cm->cur_frame->cur_frame_offset = cm->frame_offset;
MV_REFERENCE_FRAME ref_frame;
for (ref_frame = LAST_FRAME; ref_frame <= ALTREF_FRAME; ++ref_frame) {
const int buf_idx = cm->frame_refs[ref_frame - LAST_FRAME].idx;
if (buf_idx >= 0)
cm->cur_frame->ref_frame_offset[ref_frame - LAST_FRAME] =
cm->buffer_pool->frame_bufs[buf_idx].cur_frame_offset;
}
}
void av1_setup_frame_sign_bias(AV1_COMMON *cm) {
MV_REFERENCE_FRAME ref_frame;
for (ref_frame = LAST_FRAME; ref_frame <= ALTREF_FRAME; ++ref_frame) {
const int buf_idx = cm->frame_refs[ref_frame - LAST_FRAME].idx;
if (cm->seq_params.enable_order_hint && buf_idx != INVALID_IDX) {
const int ref_frame_offset =
cm->buffer_pool->frame_bufs[buf_idx].cur_frame_offset;
cm->ref_frame_sign_bias[ref_frame] =
(get_relative_dist(cm, ref_frame_offset, (int)cm->frame_offset) <= 0)
? 0
: 1;
} else {
cm->ref_frame_sign_bias[ref_frame] = 0;
}
}
}
#define MAX_OFFSET_WIDTH 64
#define MAX_OFFSET_HEIGHT 0
static int get_block_position(AV1_COMMON *cm, int *mi_r, int *mi_c, int blk_row,
int blk_col, MV mv, int sign_bias) {
const int base_blk_row = (blk_row >> 3) << 3;
const int base_blk_col = (blk_col >> 3) << 3;
const int row_offset = (mv.row >= 0) ? (mv.row >> (4 + MI_SIZE_LOG2))
: -((-mv.row) >> (4 + MI_SIZE_LOG2));
const int col_offset = (mv.col >= 0) ? (mv.col >> (4 + MI_SIZE_LOG2))
: -((-mv.col) >> (4 + MI_SIZE_LOG2));
const int row =
(sign_bias == 1) ? blk_row - row_offset : blk_row + row_offset;
const int col =
(sign_bias == 1) ? blk_col - col_offset : blk_col + col_offset;
if (row < 0 || row >= (cm->mi_rows >> 1) || col < 0 ||
col >= (cm->mi_cols >> 1))
return 0;
if (row < base_blk_row - (MAX_OFFSET_HEIGHT >> 3) ||
row >= base_blk_row + 8 + (MAX_OFFSET_HEIGHT >> 3) ||
col < base_blk_col - (MAX_OFFSET_WIDTH >> 3) ||
col >= base_blk_col + 8 + (MAX_OFFSET_WIDTH >> 3))
return 0;
*mi_r = row;
*mi_c = col;
return 1;
}
// Note: motion_filed_projection finds motion vectors of current frame's
// reference frame, and projects them to current frame. To make it clear,
// let's call current frame's reference frame as start frame.
// Call Start frame's reference frames as reference frames.
// Call ref_offset as frame distances between start frame and its reference
// frames.
static int motion_field_projection(AV1_COMMON *cm,
MV_REFERENCE_FRAME start_frame, int dir) {
TPL_MV_REF *tpl_mvs_base = cm->tpl_mvs;
int ref_offset[REF_FRAMES] = { 0 };
(void)dir;
const int start_frame_idx = cm->frame_refs[FWD_RF_OFFSET(start_frame)].idx;
if (start_frame_idx < 0) return 0;
if (cm->buffer_pool->frame_bufs[start_frame_idx].intra_only) return 0;
if (cm->buffer_pool->frame_bufs[start_frame_idx].mi_rows != cm->mi_rows ||
cm->buffer_pool->frame_bufs[start_frame_idx].mi_cols != cm->mi_cols)
return 0;
const int start_frame_offset =
cm->buffer_pool->frame_bufs[start_frame_idx].cur_frame_offset;
const unsigned int *const ref_frame_offsets =
&cm->buffer_pool->frame_bufs[start_frame_idx].ref_frame_offset[0];
const int cur_frame_offset = cm->cur_frame->cur_frame_offset;
int start_to_current_frame_offset =
get_relative_dist(cm, start_frame_offset, cur_frame_offset);
for (MV_REFERENCE_FRAME rf = LAST_FRAME; rf <= INTER_REFS_PER_FRAME; ++rf) {
ref_offset[rf] = get_relative_dist(cm, start_frame_offset,
ref_frame_offsets[rf - LAST_FRAME]);
}
if (dir == 2) start_to_current_frame_offset = -start_to_current_frame_offset;
MV_REF *mv_ref_base = cm->buffer_pool->frame_bufs[start_frame_idx].mvs;
const int mvs_rows = (cm->mi_rows + 1) >> 1;
const int mvs_cols = (cm->mi_cols + 1) >> 1;
for (int blk_row = 0; blk_row < mvs_rows; ++blk_row) {
for (int blk_col = 0; blk_col < mvs_cols; ++blk_col) {
MV_REF *mv_ref = &mv_ref_base[blk_row * mvs_cols + blk_col];
MV fwd_mv = mv_ref->mv.as_mv;
if (mv_ref->ref_frame > INTRA_FRAME) {
int_mv this_mv;
int mi_r, mi_c;
const int ref_frame_offset = ref_offset[mv_ref->ref_frame];
int pos_valid =
abs(ref_frame_offset) <= MAX_FRAME_DISTANCE &&
ref_frame_offset > 0 &&
abs(start_to_current_frame_offset) <= MAX_FRAME_DISTANCE;
if (pos_valid) {
get_mv_projection(&this_mv.as_mv, fwd_mv,
start_to_current_frame_offset, ref_frame_offset);
pos_valid = get_block_position(cm, &mi_r, &mi_c, blk_row, blk_col,
this_mv.as_mv, dir >> 1);
}
if (pos_valid) {
const int mi_offset = mi_r * (cm->mi_stride >> 1) + mi_c;
tpl_mvs_base[mi_offset].mfmv0.as_mv.row = fwd_mv.row;
tpl_mvs_base[mi_offset].mfmv0.as_mv.col = fwd_mv.col;
tpl_mvs_base[mi_offset].ref_frame_offset = ref_frame_offset;
}
}
}
}
return 1;
}
void av1_setup_motion_field(AV1_COMMON *cm) {
memset(cm->ref_frame_side, 0, sizeof(cm->ref_frame_side));
if (!cm->seq_params.enable_order_hint) return;
TPL_MV_REF *tpl_mvs_base = cm->tpl_mvs;
int size = ((cm->mi_rows + MAX_MIB_SIZE) >> 1) * (cm->mi_stride >> 1);
for (int idx = 0; idx < size; ++idx) {
tpl_mvs_base[idx].mfmv0.as_int = INVALID_MV;
tpl_mvs_base[idx].ref_frame_offset = 0;
}
const int cur_order_hint = cm->cur_frame->cur_frame_offset;
RefCntBuffer *const frame_bufs = cm->buffer_pool->frame_bufs;
int ref_buf_idx[INTER_REFS_PER_FRAME];
int ref_order_hint[INTER_REFS_PER_FRAME];
for (int ref_frame = LAST_FRAME; ref_frame <= ALTREF_FRAME; ref_frame++) {
const int ref_idx = ref_frame - LAST_FRAME;
const int buf_idx = cm->frame_refs[ref_idx].idx;
int order_hint = 0;
if (buf_idx >= 0) order_hint = frame_bufs[buf_idx].cur_frame_offset;
ref_buf_idx[ref_idx] = buf_idx;
ref_order_hint[ref_idx] = order_hint;
if (get_relative_dist(cm, order_hint, cur_order_hint) > 0)
cm->ref_frame_side[ref_frame] = 1;
else if (order_hint == cur_order_hint)
cm->ref_frame_side[ref_frame] = -1;
}
int ref_stamp = MFMV_STACK_SIZE - 1;
if (ref_buf_idx[LAST_FRAME - LAST_FRAME] >= 0) {
const int alt_of_lst_order_hint =
frame_bufs[ref_buf_idx[LAST_FRAME - LAST_FRAME]]
.ref_frame_offset[ALTREF_FRAME - LAST_FRAME];
const int is_lst_overlay =
(alt_of_lst_order_hint == ref_order_hint[GOLDEN_FRAME - LAST_FRAME]);
if (!is_lst_overlay) motion_field_projection(cm, LAST_FRAME, 2);
--ref_stamp;
}
if (get_relative_dist(cm, ref_order_hint[BWDREF_FRAME - LAST_FRAME],
cur_order_hint) > 0) {
if (motion_field_projection(cm, BWDREF_FRAME, 0)) --ref_stamp;
}
if (get_relative_dist(cm, ref_order_hint[ALTREF2_FRAME - LAST_FRAME],
cur_order_hint) > 0) {
if (motion_field_projection(cm, ALTREF2_FRAME, 0)) --ref_stamp;
}
if (get_relative_dist(cm, ref_order_hint[ALTREF_FRAME - LAST_FRAME],
cur_order_hint) > 0 &&
ref_stamp >= 0)
if (motion_field_projection(cm, ALTREF_FRAME, 0)) --ref_stamp;
if (ref_stamp >= 0 && ref_buf_idx[LAST2_FRAME - LAST_FRAME] >= 0)
if (motion_field_projection(cm, LAST2_FRAME, 2)) --ref_stamp;
}
static INLINE void record_samples(MB_MODE_INFO *mbmi, int *pts, int *pts_inref,
int row_offset, int sign_r, int col_offset,
int sign_c) {
int bw = block_size_wide[mbmi->sb_type];
int bh = block_size_high[mbmi->sb_type];
int x = col_offset * MI_SIZE + sign_c * AOMMAX(bw, MI_SIZE) / 2 - 1;
int y = row_offset * MI_SIZE + sign_r * AOMMAX(bh, MI_SIZE) / 2 - 1;
pts[0] = (x * 8);
pts[1] = (y * 8);
pts_inref[0] = (x * 8) + mbmi->mv[0].as_mv.col;
pts_inref[1] = (y * 8) + mbmi->mv[0].as_mv.row;
}
// Select samples according to the motion vector difference.
int selectSamples(MV *mv, int *pts, int *pts_inref, int len, BLOCK_SIZE bsize) {
const int bw = block_size_wide[bsize];
const int bh = block_size_high[bsize];
const int thresh = clamp(AOMMAX(bw, bh), 16, 112);
int pts_mvd[SAMPLES_ARRAY_SIZE] = { 0 };
int i, j, k, l = len;
int ret = 0;
assert(len <= LEAST_SQUARES_SAMPLES_MAX);
// Obtain the motion vector difference.
for (i = 0; i < len; ++i) {
pts_mvd[i] = abs(pts_inref[2 * i] - pts[2 * i] - mv->col) +
abs(pts_inref[2 * i + 1] - pts[2 * i + 1] - mv->row);
if (pts_mvd[i] > thresh)
pts_mvd[i] = -1;
else
ret++;
}
// Keep at least 1 sample.
if (!ret) return 1;
i = 0;
j = l - 1;
for (k = 0; k < l - ret; k++) {
while (pts_mvd[i] != -1) i++;
while (pts_mvd[j] == -1) j--;
assert(i != j);
if (i > j) break;
// Replace the discarded samples;
pts_mvd[i] = pts_mvd[j];
pts[2 * i] = pts[2 * j];
pts[2 * i + 1] = pts[2 * j + 1];
pts_inref[2 * i] = pts_inref[2 * j];
pts_inref[2 * i + 1] = pts_inref[2 * j + 1];
i++;
j--;
}
return ret;
}
// Note: Samples returned are at 1/8-pel precision
// Sample are the neighbor block center point's coordinates relative to the
// left-top pixel of current block.
int findSamples(const AV1_COMMON *cm, MACROBLOCKD *xd, int mi_row, int mi_col,
int *pts, int *pts_inref) {
MB_MODE_INFO *const mbmi0 = xd->mi[0];
int ref_frame = mbmi0->ref_frame[0];
int up_available = xd->up_available;
int left_available = xd->left_available;
int i, mi_step = 1, np = 0;
const TileInfo *const tile = &xd->tile;
int do_tl = 1;
int do_tr = 1;
// scan the nearest above rows
if (up_available) {
int mi_row_offset = -1;
MB_MODE_INFO *mbmi = xd->mi[mi_row_offset * xd->mi_stride];
uint8_t n4_w = mi_size_wide[mbmi->sb_type];
if (xd->n4_w <= n4_w) {
// Handle "current block width <= above block width" case.
int col_offset = -mi_col % n4_w;
if (col_offset < 0) do_tl = 0;
if (col_offset + n4_w > xd->n4_w) do_tr = 0;
if (mbmi->ref_frame[0] == ref_frame && mbmi->ref_frame[1] == NONE_FRAME) {
record_samples(mbmi, pts, pts_inref, 0, -1, col_offset, 1);
pts += 2;
pts_inref += 2;
np++;
if (np >= LEAST_SQUARES_SAMPLES_MAX) return LEAST_SQUARES_SAMPLES_MAX;
}
} else {
// Handle "current block width > above block width" case.
for (i = 0; i < AOMMIN(xd->n4_w, cm->mi_cols - mi_col); i += mi_step) {
int mi_col_offset = i;
mbmi = xd->mi[mi_col_offset + mi_row_offset * xd->mi_stride];
n4_w = mi_size_wide[mbmi->sb_type];
mi_step = AOMMIN(xd->n4_w, n4_w);
if (mbmi->ref_frame[0] == ref_frame &&
mbmi->ref_frame[1] == NONE_FRAME) {
record_samples(mbmi, pts, pts_inref, 0, -1, i, 1);
pts += 2;
pts_inref += 2;
np++;
if (np >= LEAST_SQUARES_SAMPLES_MAX) return LEAST_SQUARES_SAMPLES_MAX;
}
}
}
}
assert(np <= LEAST_SQUARES_SAMPLES_MAX);
// scan the nearest left columns
if (left_available) {
int mi_col_offset = -1;
MB_MODE_INFO *mbmi = xd->mi[mi_col_offset];
uint8_t n4_h = mi_size_high[mbmi->sb_type];
if (xd->n4_h <= n4_h) {
// Handle "current block height <= above block height" case.
int row_offset = -mi_row % n4_h;
if (row_offset < 0) do_tl = 0;
if (mbmi->ref_frame[0] == ref_frame && mbmi->ref_frame[1] == NONE_FRAME) {
record_samples(mbmi, pts, pts_inref, row_offset, 1, 0, -1);
pts += 2;
pts_inref += 2;
np++;
if (np >= LEAST_SQUARES_SAMPLES_MAX) return LEAST_SQUARES_SAMPLES_MAX;
}
} else {
// Handle "current block height > above block height" case.
for (i = 0; i < AOMMIN(xd->n4_h, cm->mi_rows - mi_row); i += mi_step) {
int mi_row_offset = i;
mbmi = xd->mi[mi_col_offset + mi_row_offset * xd->mi_stride];
n4_h = mi_size_high[mbmi->sb_type];
mi_step = AOMMIN(xd->n4_h, n4_h);
if (mbmi->ref_frame[0] == ref_frame &&
mbmi->ref_frame[1] == NONE_FRAME) {
record_samples(mbmi, pts, pts_inref, i, 1, 0, -1);
pts += 2;
pts_inref += 2;
np++;
if (np >= LEAST_SQUARES_SAMPLES_MAX) return LEAST_SQUARES_SAMPLES_MAX;
}
}
}
}
assert(np <= LEAST_SQUARES_SAMPLES_MAX);
// Top-left block
if (do_tl && left_available && up_available) {
int mi_row_offset = -1;
int mi_col_offset = -1;
MB_MODE_INFO *mbmi = xd->mi[mi_col_offset + mi_row_offset * xd->mi_stride];
if (mbmi->ref_frame[0] == ref_frame && mbmi->ref_frame[1] == NONE_FRAME) {
record_samples(mbmi, pts, pts_inref, 0, -1, 0, -1);
pts += 2;
pts_inref += 2;
np++;
if (np >= LEAST_SQUARES_SAMPLES_MAX) return LEAST_SQUARES_SAMPLES_MAX;
}
}
assert(np <= LEAST_SQUARES_SAMPLES_MAX);
// Top-right block
if (do_tr &&
has_top_right(cm, xd, mi_row, mi_col, AOMMAX(xd->n4_w, xd->n4_h))) {
POSITION trb_pos = { -1, xd->n4_w };
if (is_inside(tile, mi_col, mi_row, &trb_pos)) {
int mi_row_offset = -1;
int mi_col_offset = xd->n4_w;
MB_MODE_INFO *mbmi =
xd->mi[mi_col_offset + mi_row_offset * xd->mi_stride];
if (mbmi->ref_frame[0] == ref_frame && mbmi->ref_frame[1] == NONE_FRAME) {
record_samples(mbmi, pts, pts_inref, 0, -1, xd->n4_w, 1);
np++;
if (np >= LEAST_SQUARES_SAMPLES_MAX) return LEAST_SQUARES_SAMPLES_MAX;
}
}
}
assert(np <= LEAST_SQUARES_SAMPLES_MAX);
return np;
}
void av1_setup_skip_mode_allowed(AV1_COMMON *cm) {
cm->is_skip_mode_allowed = 0;
cm->ref_frame_idx_0 = cm->ref_frame_idx_1 = INVALID_IDX;
if (!cm->seq_params.enable_order_hint || frame_is_intra_only(cm) ||
cm->reference_mode == SINGLE_REFERENCE)
return;
RefCntBuffer *const frame_bufs = cm->buffer_pool->frame_bufs;
const int cur_frame_offset = cm->frame_offset;
int ref_frame_offset[2] = { -1, INT_MAX };
int ref_idx[2] = { INVALID_IDX, INVALID_IDX };
// Identify the nearest forward and backward references.
for (int i = 0; i < INTER_REFS_PER_FRAME; ++i) {
const int buf_idx = cm->frame_refs[i].idx;
if (buf_idx == INVALID_IDX) continue;
const int ref_offset = frame_bufs[buf_idx].cur_frame_offset;
if (get_relative_dist(cm, ref_offset, cur_frame_offset) < 0) {
// Forward reference
if (ref_frame_offset[0] == -1 ||
get_relative_dist(cm, ref_offset, ref_frame_offset[0]) > 0) {
ref_frame_offset[0] = ref_offset;
ref_idx[0] = i;
}
} else if (get_relative_dist(cm, ref_offset, cur_frame_offset) > 0) {
// Backward reference
if (ref_frame_offset[1] == INT_MAX ||
get_relative_dist(cm, ref_offset, ref_frame_offset[1]) < 0) {
ref_frame_offset[1] = ref_offset;
ref_idx[1] = i;
}
}
}
if (ref_idx[0] != INVALID_IDX && ref_idx[1] != INVALID_IDX) {
// == Bi-directional prediction ==
cm->is_skip_mode_allowed = 1;
cm->ref_frame_idx_0 = AOMMIN(ref_idx[0], ref_idx[1]);
cm->ref_frame_idx_1 = AOMMAX(ref_idx[0], ref_idx[1]);
} else if (ref_idx[0] != INVALID_IDX && ref_idx[1] == INVALID_IDX) {
// == Forward prediction only ==
// Identify the second nearest forward reference.
ref_frame_offset[1] = -1;
for (int i = 0; i < INTER_REFS_PER_FRAME; ++i) {
const int buf_idx = cm->frame_refs[i].idx;
if (buf_idx == INVALID_IDX) continue;
const int ref_offset = frame_bufs[buf_idx].cur_frame_offset;
if ((ref_frame_offset[0] != -1 &&
get_relative_dist(cm, ref_offset, ref_frame_offset[0]) < 0) &&
(ref_frame_offset[1] == -1 ||
get_relative_dist(cm, ref_offset, ref_frame_offset[1]) > 0)) {
// Second closest forward reference
ref_frame_offset[1] = ref_offset;
ref_idx[1] = i;
}
}
if (ref_frame_offset[1] != -1) {
cm->is_skip_mode_allowed = 1;
cm->ref_frame_idx_0 = AOMMIN(ref_idx[0], ref_idx[1]);
cm->ref_frame_idx_1 = AOMMAX(ref_idx[0], ref_idx[1]);
}
}
}
typedef struct {
int map_idx; // frame map index
int buf_idx; // frame buffer index
int sort_idx; // index based on the offset to be used for sorting
} REF_FRAME_INFO;
static int compare_ref_frame_info(const void *arg_a, const void *arg_b) {
const REF_FRAME_INFO *info_a = (REF_FRAME_INFO *)arg_a;
const REF_FRAME_INFO *info_b = (REF_FRAME_INFO *)arg_b;
if (info_a->sort_idx < info_b->sort_idx) return -1;
if (info_a->sort_idx > info_b->sort_idx) return 1;
return (info_a->map_idx < info_b->map_idx)
? -1
: ((info_a->map_idx > info_b->map_idx) ? 1 : 0);
}
static void set_ref_frame_info(AV1_COMMON *const cm, int frame_idx,
REF_FRAME_INFO *ref_info) {
assert(frame_idx >= 0 && frame_idx < INTER_REFS_PER_FRAME);
const int buf_idx = ref_info->buf_idx;
cm->frame_refs[frame_idx].idx = buf_idx;
cm->frame_refs[frame_idx].buf = &cm->buffer_pool->frame_bufs[buf_idx].buf;
cm->frame_refs[frame_idx].map_idx = ref_info->map_idx;
}
void av1_set_frame_refs(AV1_COMMON *const cm, int lst_map_idx,
int gld_map_idx) {
BufferPool *const pool = cm->buffer_pool;
RefCntBuffer *const frame_bufs = pool->frame_bufs;
int lst_frame_sort_idx = -1;
int gld_frame_sort_idx = -1;
assert(cm->seq_params.enable_order_hint);
assert(cm->seq_params.order_hint_bits_minus_1 >= 0);
const int cur_frame_offset = (int)cm->frame_offset;
const int cur_frame_sort_idx = 1 << cm->seq_params.order_hint_bits_minus_1;
REF_FRAME_INFO ref_frame_info[REF_FRAMES];
int ref_flag_list[INTER_REFS_PER_FRAME] = { 0, 0, 0, 0, 0, 0, 0 };
for (int i = 0; i < REF_FRAMES; ++i) {
const int map_idx = i;
ref_frame_info[i].map_idx = map_idx;
ref_frame_info[i].sort_idx = -1;
const int buf_idx = cm->ref_frame_map[map_idx];
ref_frame_info[i].buf_idx = buf_idx;
if (buf_idx < 0 || buf_idx >= FRAME_BUFFERS) continue;
// TODO(zoeliu@google.com): To verify the checking on ref_count.
if (frame_bufs[buf_idx].ref_count <= 0) continue;
const int offset = (int)frame_bufs[buf_idx].cur_frame_offset;
ref_frame_info[i].sort_idx =
(offset == -1) ? -1
: cur_frame_sort_idx +
get_relative_dist(cm, offset, cur_frame_offset);
assert(ref_frame_info[i].sort_idx >= -1);
if (map_idx == lst_map_idx) lst_frame_sort_idx = ref_frame_info[i].sort_idx;
if (map_idx == gld_map_idx) gld_frame_sort_idx = ref_frame_info[i].sort_idx;
}
// Confirm both LAST_FRAME and GOLDEN_FRAME are valid forward reference
// frames.
if (lst_frame_sort_idx == -1 || lst_frame_sort_idx >= cur_frame_sort_idx) {
aom_internal_error(&cm->error, AOM_CODEC_CORRUPT_FRAME,
"Inter frame requests a look-ahead frame as LAST");
}
if (gld_frame_sort_idx == -1 || gld_frame_sort_idx >= cur_frame_sort_idx) {
aom_internal_error(&cm->error, AOM_CODEC_CORRUPT_FRAME,
"Inter frame requests a look-ahead frame as GOLDEN");
}
// Sort ref frames based on their frame_offset values.
qsort(ref_frame_info, REF_FRAMES, sizeof(REF_FRAME_INFO),
compare_ref_frame_info);
// Identify forward and backward reference frames.
// Forward reference: offset < cur_frame_offset
// Backward reference: offset >= cur_frame_offset
int fwd_start_idx = 0, fwd_end_idx = REF_FRAMES - 1;
for (int i = 0; i < REF_FRAMES; i++) {
if (ref_frame_info[i].sort_idx == -1) {
fwd_start_idx++;
continue;
}
if (ref_frame_info[i].sort_idx >= cur_frame_sort_idx) {
fwd_end_idx = i - 1;
break;
}
}
int bwd_start_idx = fwd_end_idx + 1;
int bwd_end_idx = REF_FRAMES - 1;
// === Backward Reference Frames ===
// == ALTREF_FRAME ==
if (bwd_start_idx <= bwd_end_idx) {
set_ref_frame_info(cm, ALTREF_FRAME - LAST_FRAME,
&ref_frame_info[bwd_end_idx]);
ref_flag_list[ALTREF_FRAME - LAST_FRAME] = 1;
bwd_end_idx--;
}
// == BWDREF_FRAME ==
if (bwd_start_idx <= bwd_end_idx) {
set_ref_frame_info(cm, BWDREF_FRAME - LAST_FRAME,
&ref_frame_info[bwd_start_idx]);
ref_flag_list[BWDREF_FRAME - LAST_FRAME] = 1;
bwd_start_idx++;
}
// == ALTREF2_FRAME ==
if (bwd_start_idx <= bwd_end_idx) {
set_ref_frame_info(cm, ALTREF2_FRAME - LAST_FRAME,
&ref_frame_info[bwd_start_idx]);
ref_flag_list[ALTREF2_FRAME - LAST_FRAME] = 1;
}
// === Forward Reference Frames ===
for (int i = fwd_start_idx; i <= fwd_end_idx; ++i) {
// == LAST_FRAME ==
if (ref_frame_info[i].map_idx == lst_map_idx) {
set_ref_frame_info(cm, LAST_FRAME - LAST_FRAME, &ref_frame_info[i]);
ref_flag_list[LAST_FRAME - LAST_FRAME] = 1;
}
// == GOLDEN_FRAME ==
if (ref_frame_info[i].map_idx == gld_map_idx) {
set_ref_frame_info(cm, GOLDEN_FRAME - LAST_FRAME, &ref_frame_info[i]);
ref_flag_list[GOLDEN_FRAME - LAST_FRAME] = 1;
}
}
assert(ref_flag_list[LAST_FRAME - LAST_FRAME] == 1 &&
ref_flag_list[GOLDEN_FRAME - LAST_FRAME] == 1);
// == LAST2_FRAME ==
// == LAST3_FRAME ==
// == BWDREF_FRAME ==
// == ALTREF2_FRAME ==
// == ALTREF_FRAME ==
// Set up the reference frames in the anti-chronological order.
static const MV_REFERENCE_FRAME ref_frame_list[INTER_REFS_PER_FRAME - 2] = {
LAST2_FRAME, LAST3_FRAME, BWDREF_FRAME, ALTREF2_FRAME, ALTREF_FRAME
};
int ref_idx;
for (ref_idx = 0; ref_idx < (INTER_REFS_PER_FRAME - 2); ref_idx++) {
const MV_REFERENCE_FRAME ref_frame = ref_frame_list[ref_idx];
if (ref_flag_list[ref_frame - LAST_FRAME] == 1) continue;
while (fwd_start_idx <= fwd_end_idx &&
(ref_frame_info[fwd_end_idx].map_idx == lst_map_idx ||
ref_frame_info[fwd_end_idx].map_idx == gld_map_idx)) {
fwd_end_idx--;
}
if (fwd_start_idx > fwd_end_idx) break;
set_ref_frame_info(cm, ref_frame - LAST_FRAME,
&ref_frame_info[fwd_end_idx]);
ref_flag_list[ref_frame - LAST_FRAME] = 1;
fwd_end_idx--;
}
// Assign all the remaining frame(s), if any, to the earliest reference frame.
for (; ref_idx < (INTER_REFS_PER_FRAME - 2); ref_idx++) {
const MV_REFERENCE_FRAME ref_frame = ref_frame_list[ref_idx];
if (ref_flag_list[ref_frame - LAST_FRAME] == 1) continue;
set_ref_frame_info(cm, ref_frame - LAST_FRAME,
&ref_frame_info[fwd_start_idx]);
ref_flag_list[ref_frame - LAST_FRAME] = 1;
}
for (int i = 0; i < INTER_REFS_PER_FRAME; i++) {
assert(ref_flag_list[i] == 1);
}
}