6ef805eb9d
Code intra/inter, then comp/single, then the ref frame selection. Use contextualization for all steps. Don't code two past frames in comp pred mode. Change-Id: I4639a78cd5cccb283023265dbcc07898c3e7cf95
339 lines
12 KiB
C
339 lines
12 KiB
C
/*
|
|
* Copyright (c) 2012 The WebM project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#include "vp9/common/vp9_mvref_common.h"
|
|
|
|
#define MVREF_NEIGHBOURS 8
|
|
|
|
static int b_mv_ref_search[MVREF_NEIGHBOURS][2] = {
|
|
{0, -1}, {-1, 0}, {-1, -1}, {0, -2},
|
|
{-2, 0}, {-1, -2}, {-2, -1}, {-2, -2}
|
|
};
|
|
|
|
static int mb_mv_ref_search[MVREF_NEIGHBOURS][2] = {
|
|
{0, -1}, {-1, 0}, {-1, -1}, {0, -3},
|
|
{-3, 0}, {-1, -3}, {-3, -1}, {-3, -3}
|
|
};
|
|
|
|
static int sb_mv_ref_search[MVREF_NEIGHBOURS][2] = {
|
|
{0, -1}, {-1, 0}, {2, -1}, {-1, 2},
|
|
{-1, -1}, {0, -3}, {-3, 0}, {-1, -3}
|
|
};
|
|
|
|
static int sb64_mv_ref_search[MVREF_NEIGHBOURS][2] = {
|
|
{0, -1}, {-1, 0}, {2, -1}, {-1, 2},
|
|
{4, -1}, {-1, 4}, {6, -1}, {-1, -1}
|
|
};
|
|
|
|
// clamp_mv_ref
|
|
#define MV_BORDER (16 << 3) // Allow 16 pels in 1/8th pel units
|
|
|
|
static void clamp_mv_ref(const MACROBLOCKD *xd, int_mv *mv) {
|
|
mv->as_mv.col = clamp(mv->as_mv.col, xd->mb_to_left_edge - MV_BORDER,
|
|
xd->mb_to_right_edge + MV_BORDER);
|
|
mv->as_mv.row = clamp(mv->as_mv.row, xd->mb_to_top_edge - MV_BORDER,
|
|
xd->mb_to_bottom_edge + MV_BORDER);
|
|
}
|
|
|
|
// Gets a candidate refenence motion vector from the given mode info
|
|
// structure if one exists that matches the given reference frame.
|
|
static int get_matching_candidate(const MODE_INFO *candidate_mi,
|
|
MV_REFERENCE_FRAME ref_frame,
|
|
int_mv *c_mv, int block_idx) {
|
|
if (ref_frame == candidate_mi->mbmi.ref_frame[0]) {
|
|
if (block_idx >= 0 && candidate_mi->mbmi.sb_type < BLOCK_SIZE_SB8X8)
|
|
c_mv->as_int = candidate_mi->bmi[block_idx].as_mv[0].as_int;
|
|
else
|
|
c_mv->as_int = candidate_mi->mbmi.mv[0].as_int;
|
|
} else if (ref_frame == candidate_mi->mbmi.ref_frame[1]) {
|
|
if (block_idx >= 0 && candidate_mi->mbmi.sb_type < BLOCK_SIZE_SB8X8)
|
|
c_mv->as_int = candidate_mi->bmi[block_idx].as_mv[1].as_int;
|
|
else
|
|
c_mv->as_int = candidate_mi->mbmi.mv[1].as_int;
|
|
} else {
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
// Gets candidate refenence motion vector(s) from the given mode info
|
|
// structure if they exists and do NOT match the given reference frame.
|
|
static void get_non_matching_candidates(const MODE_INFO *candidate_mi,
|
|
MV_REFERENCE_FRAME ref_frame,
|
|
MV_REFERENCE_FRAME *c_ref_frame,
|
|
int_mv *c_mv,
|
|
MV_REFERENCE_FRAME *c2_ref_frame,
|
|
int_mv *c2_mv) {
|
|
|
|
c_mv->as_int = 0;
|
|
c2_mv->as_int = 0;
|
|
*c_ref_frame = INTRA_FRAME;
|
|
*c2_ref_frame = INTRA_FRAME;
|
|
|
|
// If first candidate not valid neither will be.
|
|
if (candidate_mi->mbmi.ref_frame[0] > INTRA_FRAME) {
|
|
// First candidate
|
|
if (candidate_mi->mbmi.ref_frame[0] != ref_frame) {
|
|
*c_ref_frame = candidate_mi->mbmi.ref_frame[0];
|
|
c_mv->as_int = candidate_mi->mbmi.mv[0].as_int;
|
|
}
|
|
|
|
// Second candidate
|
|
if ((candidate_mi->mbmi.ref_frame[1] > INTRA_FRAME) &&
|
|
(candidate_mi->mbmi.ref_frame[1] != ref_frame) &&
|
|
(candidate_mi->mbmi.mv[1].as_int != candidate_mi->mbmi.mv[0].as_int)) {
|
|
*c2_ref_frame = candidate_mi->mbmi.ref_frame[1];
|
|
c2_mv->as_int = candidate_mi->mbmi.mv[1].as_int;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// Performs mv sign inversion if indicated by the reference frame combination.
|
|
static void scale_mv(MACROBLOCKD *xd, MV_REFERENCE_FRAME this_ref_frame,
|
|
MV_REFERENCE_FRAME candidate_ref_frame,
|
|
int_mv *candidate_mv, int *ref_sign_bias) {
|
|
|
|
// Sign inversion where appropriate.
|
|
if (ref_sign_bias[candidate_ref_frame] != ref_sign_bias[this_ref_frame]) {
|
|
candidate_mv->as_mv.row = -candidate_mv->as_mv.row;
|
|
candidate_mv->as_mv.col = -candidate_mv->as_mv.col;
|
|
}
|
|
}
|
|
|
|
// Add a candidate mv.
|
|
// Discard if it has already been seen.
|
|
static void add_candidate_mv(int_mv *mv_list, int *mv_scores,
|
|
int *candidate_count, int_mv candidate_mv,
|
|
int weight) {
|
|
if (*candidate_count == 0) {
|
|
mv_list[0].as_int = candidate_mv.as_int;
|
|
mv_scores[0] = weight;
|
|
*candidate_count += 1;
|
|
} else if ((*candidate_count == 1) &&
|
|
(candidate_mv.as_int != mv_list[0].as_int)) {
|
|
mv_list[1].as_int = candidate_mv.as_int;
|
|
mv_scores[1] = weight;
|
|
*candidate_count += 1;
|
|
}
|
|
}
|
|
|
|
// This function searches the neighbourhood of a given MB/SB
|
|
// to try and find candidate reference vectors.
|
|
//
|
|
void vp9_find_mv_refs_idx(VP9_COMMON *cm, MACROBLOCKD *xd, MODE_INFO *here,
|
|
MODE_INFO *lf_here, MV_REFERENCE_FRAME ref_frame,
|
|
int_mv *mv_ref_list, int *ref_sign_bias,
|
|
int block_idx) {
|
|
int i;
|
|
MODE_INFO *candidate_mi;
|
|
MB_MODE_INFO * mbmi = &xd->mode_info_context->mbmi;
|
|
int_mv c_refmv;
|
|
int_mv c2_refmv;
|
|
MV_REFERENCE_FRAME c_ref_frame;
|
|
MV_REFERENCE_FRAME c2_ref_frame;
|
|
int candidate_scores[MAX_MV_REF_CANDIDATES];
|
|
int refmv_count = 0;
|
|
int split_count = 0;
|
|
int (*mv_ref_search)[2];
|
|
const int mi_col = get_mi_col(xd);
|
|
int intra_count = 0;
|
|
int zero_count = 0;
|
|
int newmv_count = 0;
|
|
int x_idx = 0, y_idx = 0;
|
|
|
|
// Blank the reference vector lists and other local structures.
|
|
vpx_memset(mv_ref_list, 0, sizeof(int_mv) * MAX_MV_REF_CANDIDATES);
|
|
vpx_memset(candidate_scores, 0, sizeof(candidate_scores));
|
|
|
|
if (xd->mb_to_right_edge < 0 || xd->mb_to_bottom_edge < 0) {
|
|
int pixels_wide = 4 * b_width_log2(mbmi->sb_type);
|
|
int pixels_high = 4 * b_height_log2(mbmi->sb_type);
|
|
int pixels_square = 0;
|
|
|
|
if (xd->mb_to_right_edge < 0)
|
|
pixels_wide += (xd->mb_to_right_edge >> 3);
|
|
|
|
if (xd->mb_to_bottom_edge < 0)
|
|
pixels_high += (xd->mb_to_bottom_edge >> 3);
|
|
|
|
if ( pixels_wide < pixels_high )
|
|
pixels_square = pixels_wide;
|
|
else
|
|
pixels_square = pixels_high;
|
|
|
|
if (pixels_square == 64) {
|
|
mv_ref_search = sb64_mv_ref_search;
|
|
} else if (pixels_square == 32) {
|
|
mv_ref_search = sb_mv_ref_search;
|
|
} else if (pixels_square == 16) {
|
|
mv_ref_search = mb_mv_ref_search;
|
|
} else {
|
|
mv_ref_search = b_mv_ref_search;
|
|
if (mbmi->sb_type < BLOCK_SIZE_SB8X8) {
|
|
x_idx = block_idx & 1;
|
|
y_idx = block_idx >> 1;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
if (mbmi->sb_type == BLOCK_SIZE_SB64X64) {
|
|
mv_ref_search = sb64_mv_ref_search;
|
|
} else if (mbmi->sb_type >= BLOCK_SIZE_SB32X32) {
|
|
mv_ref_search = sb_mv_ref_search;
|
|
} else if (mbmi->sb_type >= BLOCK_SIZE_MB16X16) {
|
|
mv_ref_search = mb_mv_ref_search;
|
|
} else {
|
|
mv_ref_search = b_mv_ref_search;
|
|
if (mbmi->sb_type < BLOCK_SIZE_SB8X8) {
|
|
x_idx = block_idx & 1;
|
|
y_idx = block_idx >> 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
// We first scan for candidate vectors that match the current reference frame
|
|
// Look at nearest neigbours
|
|
for (i = 0; i < 2; ++i) {
|
|
const int mi_search_col = mi_col + mv_ref_search[i][0];
|
|
|
|
if ((mi_search_col >= cm->cur_tile_mi_col_start) &&
|
|
(mi_search_col < cm->cur_tile_mi_col_end) &&
|
|
((mv_ref_search[i][1] << 6) >= xd->mb_to_top_edge)) {
|
|
int b;
|
|
|
|
candidate_mi = here + mv_ref_search[i][0] +
|
|
(mv_ref_search[i][1] * xd->mode_info_stride);
|
|
|
|
if (block_idx >= 0) {
|
|
if (mv_ref_search[i][0])
|
|
b = 1 + y_idx * 2;
|
|
else
|
|
b = 2 + x_idx;
|
|
} else {
|
|
b = -1;
|
|
}
|
|
if (get_matching_candidate(candidate_mi, ref_frame, &c_refmv, b)) {
|
|
add_candidate_mv(mv_ref_list, candidate_scores,
|
|
&refmv_count, c_refmv, 16);
|
|
}
|
|
split_count += (candidate_mi->mbmi.sb_type < BLOCK_SIZE_SB8X8 &&
|
|
candidate_mi->mbmi.ref_frame[0] != INTRA_FRAME);
|
|
|
|
// Count number of neihgbours coded intra and zeromv
|
|
intra_count += (candidate_mi->mbmi.mode < NEARESTMV);
|
|
zero_count += (candidate_mi->mbmi.mode == ZEROMV);
|
|
newmv_count += (candidate_mi->mbmi.mode >= NEWMV);
|
|
}
|
|
}
|
|
|
|
// More distant neigbours
|
|
for (i = 2; (i < MVREF_NEIGHBOURS) &&
|
|
(refmv_count < MAX_MV_REF_CANDIDATES); ++i) {
|
|
const int mi_search_col = mi_col + mv_ref_search[i][0];
|
|
|
|
if ((mi_search_col >= cm->cur_tile_mi_col_start) &&
|
|
(mi_search_col < cm->cur_tile_mi_col_end) &&
|
|
((mv_ref_search[i][1] << 6) >= xd->mb_to_top_edge)) {
|
|
candidate_mi = here + mv_ref_search[i][0] +
|
|
(mv_ref_search[i][1] * xd->mode_info_stride);
|
|
|
|
if (get_matching_candidate(candidate_mi, ref_frame, &c_refmv, -1)) {
|
|
add_candidate_mv(mv_ref_list, candidate_scores,
|
|
&refmv_count, c_refmv, 16);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Look in the last frame if it exists
|
|
if (lf_here && (refmv_count < MAX_MV_REF_CANDIDATES)) {
|
|
candidate_mi = lf_here;
|
|
if (get_matching_candidate(candidate_mi, ref_frame, &c_refmv, -1)) {
|
|
add_candidate_mv(mv_ref_list, candidate_scores,
|
|
&refmv_count, c_refmv, 16);
|
|
}
|
|
}
|
|
|
|
// If we have not found enough candidates consider ones where the
|
|
// reference frame does not match. Break out when we have
|
|
// MAX_MV_REF_CANDIDATES candidates.
|
|
// Look first at spatial neighbours
|
|
for (i = 0; (i < MVREF_NEIGHBOURS) &&
|
|
(refmv_count < MAX_MV_REF_CANDIDATES); ++i) {
|
|
const int mi_search_col = mi_col + mv_ref_search[i][0];
|
|
|
|
if ((mi_search_col >= cm->cur_tile_mi_col_start) &&
|
|
(mi_search_col < cm->cur_tile_mi_col_end) &&
|
|
((mv_ref_search[i][1] << 6) >= xd->mb_to_top_edge)) {
|
|
candidate_mi = here + mv_ref_search[i][0] +
|
|
(mv_ref_search[i][1] * xd->mode_info_stride);
|
|
|
|
get_non_matching_candidates(candidate_mi, ref_frame,
|
|
&c_ref_frame, &c_refmv,
|
|
&c2_ref_frame, &c2_refmv);
|
|
|
|
if (c_ref_frame != INTRA_FRAME) {
|
|
scale_mv(xd, ref_frame, c_ref_frame, &c_refmv, ref_sign_bias);
|
|
add_candidate_mv(mv_ref_list, candidate_scores,
|
|
&refmv_count, c_refmv, 1);
|
|
}
|
|
|
|
if (c2_ref_frame != INTRA_FRAME) {
|
|
scale_mv(xd, ref_frame, c2_ref_frame, &c2_refmv, ref_sign_bias);
|
|
add_candidate_mv(mv_ref_list, candidate_scores,
|
|
&refmv_count, c2_refmv, 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Look at the last frame if it exists
|
|
if (lf_here && (refmv_count < MAX_MV_REF_CANDIDATES)) {
|
|
candidate_mi = lf_here;
|
|
get_non_matching_candidates(candidate_mi, ref_frame,
|
|
&c_ref_frame, &c_refmv,
|
|
&c2_ref_frame, &c2_refmv);
|
|
|
|
if (c_ref_frame != INTRA_FRAME) {
|
|
scale_mv(xd, ref_frame, c_ref_frame, &c_refmv, ref_sign_bias);
|
|
add_candidate_mv(mv_ref_list, candidate_scores,
|
|
&refmv_count, c_refmv, 1);
|
|
}
|
|
|
|
if (c2_ref_frame != INTRA_FRAME) {
|
|
scale_mv(xd, ref_frame, c2_ref_frame, &c2_refmv, ref_sign_bias);
|
|
add_candidate_mv(mv_ref_list, candidate_scores,
|
|
&refmv_count, c2_refmv, 1);
|
|
}
|
|
}
|
|
|
|
if (!intra_count) {
|
|
if (!newmv_count) {
|
|
// 0 = both zero mv
|
|
// 1 = one zero mv + one a predicted mv
|
|
// 2 = two predicted mvs
|
|
mbmi->mb_mode_context[ref_frame] = 2 - zero_count;
|
|
} else {
|
|
// 3 = one predicted/zero and one new mv
|
|
// 4 = two new mvs
|
|
mbmi->mb_mode_context[ref_frame] = 2 + newmv_count;
|
|
}
|
|
} else {
|
|
// 5 = one intra neighbour + x
|
|
// 6 = two intra neighbours
|
|
mbmi->mb_mode_context[ref_frame] = 4 + intra_count;
|
|
}
|
|
|
|
// Clamp vectors
|
|
for (i = 0; i < MAX_MV_REF_CANDIDATES; ++i) {
|
|
clamp_mv_ref(xd, &mv_ref_list[i]);
|
|
}
|
|
}
|