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aomedia / aom / bc47270afe77c792dd837a594432485739e90958 / . / av1 / encoder / var_based_part.c
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/*
* Copyright (c) 2019, 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 <limits.h>
#include <math.h>
#include <stdbool.h>
#include <stdio.h>
#include "config/aom_config.h"
#include "config/aom_dsp_rtcd.h"
#include "config/av1_rtcd.h"
#include "aom_dsp/aom_dsp_common.h"
#include "aom_dsp/binary_codes_writer.h"
#include "aom_ports/mem.h"
#include "aom_ports/aom_timer.h"
#include "aom_ports/system_state.h"
#include "av1/common/reconinter.h"
#include "av1/common/blockd.h"
#include "av1/encoder/encodeframe.h"
#include "av1/encoder/var_based_part.h"
#include "av1/encoder/reconinter_enc.h"
extern const uint8_t AV1_VAR_OFFS[];
typedef struct {
VPVariance *part_variances;
VPartVar *split[4];
} variance_node;
static AOM_INLINE void tree_to_node(void *data, BLOCK_SIZE bsize,
variance_node *node) {
int i;
node->part_variances = NULL;
switch (bsize) {
case BLOCK_128X128: {
VP128x128 *vt = (VP128x128 *)data;
node->part_variances = &vt->part_variances;
for (i = 0; i < 4; i++)
node->split[i] = &vt->split[i].part_variances.none;
break;
}
case BLOCK_64X64: {
VP64x64 *vt = (VP64x64 *)data;
node->part_variances = &vt->part_variances;
for (i = 0; i < 4; i++)
node->split[i] = &vt->split[i].part_variances.none;
break;
}
case BLOCK_32X32: {
VP32x32 *vt = (VP32x32 *)data;
node->part_variances = &vt->part_variances;
for (i = 0; i < 4; i++)
node->split[i] = &vt->split[i].part_variances.none;
break;
}
case BLOCK_16X16: {
VP16x16 *vt = (VP16x16 *)data;
node->part_variances = &vt->part_variances;
for (i = 0; i < 4; i++)
node->split[i] = &vt->split[i].part_variances.none;
break;
}
case BLOCK_8X8: {
VP8x8 *vt = (VP8x8 *)data;
node->part_variances = &vt->part_variances;
for (i = 0; i < 4; i++)
node->split[i] = &vt->split[i].part_variances.none;
break;
}
default: {
VP4x4 *vt = (VP4x4 *)data;
assert(bsize == BLOCK_4X4);
node->part_variances = &vt->part_variances;
for (i = 0; i < 4; i++) node->split[i] = &vt->split[i];
break;
}
}
}
// Set variance values given sum square error, sum error, count.
static AOM_INLINE void fill_variance(uint32_t s2, int32_t s, int c,
VPartVar *v) {
v->sum_square_error = s2;
v->sum_error = s;
v->log2_count = c;
}
static AOM_INLINE void get_variance(VPartVar *v) {
v->variance =
(int)(256 * (v->sum_square_error -
(uint32_t)(((int64_t)v->sum_error * v->sum_error) >>
v->log2_count)) >>
v->log2_count);
}
static AOM_INLINE void sum_2_variances(const VPartVar *a, const VPartVar *b,
VPartVar *r) {
assert(a->log2_count == b->log2_count);
fill_variance(a->sum_square_error + b->sum_square_error,
a->sum_error + b->sum_error, a->log2_count + 1, r);
}
static AOM_INLINE void fill_variance_tree(void *data, BLOCK_SIZE bsize) {
variance_node node;
memset(&node, 0, sizeof(node));
tree_to_node(data, bsize, &node);
sum_2_variances(node.split[0], node.split[1], &node.part_variances->horz[0]);
sum_2_variances(node.split[2], node.split[3], &node.part_variances->horz[1]);
sum_2_variances(node.split[0], node.split[2], &node.part_variances->vert[0]);
sum_2_variances(node.split[1], node.split[3], &node.part_variances->vert[1]);
sum_2_variances(&node.part_variances->vert[0], &node.part_variances->vert[1],
&node.part_variances->none);
}
static AOM_INLINE void set_block_size(AV1_COMP *const cpi, MACROBLOCK *const x,
MACROBLOCKD *const xd, int mi_row,
int mi_col, BLOCK_SIZE bsize) {
if (cpi->common.mi_params.mi_cols > mi_col &&
cpi->common.mi_params.mi_rows > mi_row) {
set_mode_info_offsets(&cpi->common.mi_params, &cpi->mbmi_ext_info, x, xd,
mi_row, mi_col);
xd->mi[0]->bsize = bsize;
}
}
static int set_vt_partitioning(AV1_COMP *cpi, MACROBLOCK *const x,
MACROBLOCKD *const xd,
const TileInfo *const tile, void *data,
BLOCK_SIZE bsize, int mi_row, int mi_col,
int64_t threshold, BLOCK_SIZE bsize_min,
int force_split) {
AV1_COMMON *const cm = &cpi->common;
variance_node vt;
const int block_width = mi_size_wide[bsize];
const int block_height = mi_size_high[bsize];
assert(block_height == block_width);
tree_to_node(data, bsize, &vt);
if (force_split == 1) return 0;
// For bsize=bsize_min (16x16/8x8 for 8x8/4x4 downsampling), select if
// variance is below threshold, otherwise split will be selected.
// No check for vert/horiz split as too few samples for variance.
if (bsize == bsize_min) {
// Variance already computed to set the force_split.
if (frame_is_intra_only(cm)) get_variance(&vt.part_variances->none);
if (mi_col + block_width <= tile->mi_col_end &&
mi_row + block_height <= tile->mi_row_end &&
vt.part_variances->none.variance < threshold) {
set_block_size(cpi, x, xd, mi_row, mi_col, bsize);
return 1;
}
return 0;
} else if (bsize > bsize_min) {
// Variance already computed to set the force_split.
if (frame_is_intra_only(cm)) get_variance(&vt.part_variances->none);
// For key frame: take split for bsize above 32X32 or very high variance.
if (frame_is_intra_only(cm) &&
(bsize > BLOCK_32X32 ||
vt.part_variances->none.variance > (threshold << 4))) {
return 0;
}
// If variance is low, take the bsize (no split).
if (mi_col + block_width <= tile->mi_col_end &&
mi_row + block_height <= tile->mi_row_end &&
vt.part_variances->none.variance < threshold) {
set_block_size(cpi, x, xd, mi_row, mi_col, bsize);
return 1;
}
// Check vertical split.
if (mi_row + block_height <= tile->mi_row_end &&
mi_col + block_width / 2 <= tile->mi_col_end) {
BLOCK_SIZE subsize = get_partition_subsize(bsize, PARTITION_VERT);
get_variance(&vt.part_variances->vert[0]);
get_variance(&vt.part_variances->vert[1]);
if (vt.part_variances->vert[0].variance < threshold &&
vt.part_variances->vert[1].variance < threshold &&
get_plane_block_size(subsize, xd->plane[1].subsampling_x,
xd->plane[1].subsampling_y) < BLOCK_INVALID) {
set_block_size(cpi, x, xd, mi_row, mi_col, subsize);
set_block_size(cpi, x, xd, mi_row, mi_col + block_width / 2, subsize);
return 1;
}
}
// Check horizontal split.
if (mi_col + block_width <= tile->mi_col_end &&
mi_row + block_height / 2 <= tile->mi_row_end) {
BLOCK_SIZE subsize = get_partition_subsize(bsize, PARTITION_HORZ);
get_variance(&vt.part_variances->horz[0]);
get_variance(&vt.part_variances->horz[1]);
if (vt.part_variances->horz[0].variance < threshold &&
vt.part_variances->horz[1].variance < threshold &&
get_plane_block_size(subsize, xd->plane[1].subsampling_x,
xd->plane[1].subsampling_y) < BLOCK_INVALID) {
set_block_size(cpi, x, xd, mi_row, mi_col, subsize);
set_block_size(cpi, x, xd, mi_row + block_height / 2, mi_col, subsize);
return 1;
}
}
return 0;
}
return 0;
}
static AOM_INLINE void fill_variance_8x8avg(const uint8_t *s, int sp,
const uint8_t *d, int dp,
int x16_idx, int y16_idx,
VP16x16 *vst,
#if CONFIG_AV1_HIGHBITDEPTH
int highbd_flag,
#endif
int pixels_wide, int pixels_high,
int is_key_frame) {
int k;
for (k = 0; k < 4; k++) {
int x8_idx = x16_idx + ((k & 1) << 3);
int y8_idx = y16_idx + ((k >> 1) << 3);
unsigned int sse = 0;
int sum = 0;
if (x8_idx < pixels_wide && y8_idx < pixels_high) {
int s_avg;
int d_avg = 128;
#if CONFIG_AV1_HIGHBITDEPTH
if (highbd_flag & YV12_FLAG_HIGHBITDEPTH) {
s_avg = aom_highbd_avg_8x8(s + y8_idx * sp + x8_idx, sp);
if (!is_key_frame)
d_avg = aom_highbd_avg_8x8(d + y8_idx * dp + x8_idx, dp);
} else {
s_avg = aom_avg_8x8(s + y8_idx * sp + x8_idx, sp);
if (!is_key_frame) d_avg = aom_avg_8x8(d + y8_idx * dp + x8_idx, dp);
}
#else
s_avg = aom_avg_8x8(s + y8_idx * sp + x8_idx, sp);
if (!is_key_frame) d_avg = aom_avg_8x8(d + y8_idx * dp + x8_idx, dp);
#endif
sum = s_avg - d_avg;
sse = sum * sum;
}
fill_variance(sse, sum, 0, &vst->split[k].part_variances.none);
}
}
static int compute_minmax_8x8(const uint8_t *s, int sp, const uint8_t *d,
int dp, int x16_idx, int y16_idx,
#if CONFIG_AV1_HIGHBITDEPTH
int highbd_flag,
#endif
int pixels_wide, int pixels_high) {
int k;
int minmax_max = 0;
int minmax_min = 255;
// Loop over the 4 8x8 subblocks.
for (k = 0; k < 4; k++) {
int x8_idx = x16_idx + ((k & 1) << 3);
int y8_idx = y16_idx + ((k >> 1) << 3);
int min = 0;
int max = 0;
if (x8_idx < pixels_wide && y8_idx < pixels_high) {
#if CONFIG_AV1_HIGHBITDEPTH
if (highbd_flag & YV12_FLAG_HIGHBITDEPTH) {
aom_highbd_minmax_8x8(s + y8_idx * sp + x8_idx, sp,
d + y8_idx * dp + x8_idx, dp, &min, &max);
} else {
aom_minmax_8x8(s + y8_idx * sp + x8_idx, sp, d + y8_idx * dp + x8_idx,
dp, &min, &max);
}
#else
aom_minmax_8x8(s + y8_idx * sp + x8_idx, sp, d + y8_idx * dp + x8_idx, dp,
&min, &max);
#endif
if ((max - min) > minmax_max) minmax_max = (max - min);
if ((max - min) < minmax_min) minmax_min = (max - min);
}
}
return (minmax_max - minmax_min);
}
static AOM_INLINE void fill_variance_4x4avg(const uint8_t *s, int sp,
const uint8_t *d, int dp,
int x8_idx, int y8_idx, VP8x8 *vst,
#if CONFIG_AV1_HIGHBITDEPTH
int highbd_flag,
#endif
int pixels_wide, int pixels_high,
int is_key_frame) {
int k;
for (k = 0; k < 4; k++) {
int x4_idx = x8_idx + ((k & 1) << 2);
int y4_idx = y8_idx + ((k >> 1) << 2);
unsigned int sse = 0;
int sum = 0;
if (x4_idx < pixels_wide && y4_idx < pixels_high) {
int s_avg;
int d_avg = 128;
#if CONFIG_AV1_HIGHBITDEPTH
if (highbd_flag & YV12_FLAG_HIGHBITDEPTH) {
s_avg = aom_highbd_avg_4x4(s + y4_idx * sp + x4_idx, sp);
if (!is_key_frame)
d_avg = aom_highbd_avg_4x4(d + y4_idx * dp + x4_idx, dp);
} else {
s_avg = aom_avg_4x4(s + y4_idx * sp + x4_idx, sp);
if (!is_key_frame) d_avg = aom_avg_4x4(d + y4_idx * dp + x4_idx, dp);
}
#else
s_avg = aom_avg_4x4(s + y4_idx * sp + x4_idx, sp);
if (!is_key_frame) d_avg = aom_avg_4x4(d + y4_idx * dp + x4_idx, dp);
#endif
sum = s_avg - d_avg;
sse = sum * sum;
}
fill_variance(sse, sum, 0, &vst->split[k].part_variances.none);
}
}
// TODO(kyslov) Bring back threshold adjustment based on content state
static int64_t scale_part_thresh_content(int64_t threshold_base, int speed,
int width, int height,
int non_reference_frame) {
(void)width;
(void)height;
int64_t threshold = threshold_base;
if (non_reference_frame) threshold = (3 * threshold) >> 1;
if (speed >= 8) {
return (5 * threshold) >> 2;
}
return threshold;
}
static AOM_INLINE void set_vbp_thresholds(AV1_COMP *cpi, int64_t thresholds[],
int q, int content_lowsumdiff,
int segment_id) {
AV1_COMMON *const cm = &cpi->common;
const int is_key_frame = frame_is_intra_only(cm);
const int threshold_multiplier = is_key_frame ? 40 : 1;
int64_t threshold_base =
(int64_t)(threshold_multiplier *
cpi->enc_quant_dequant_params.dequants.y_dequant_QTX[q][1]);
const int current_qindex = cm->quant_params.base_qindex;
if (is_key_frame) {
thresholds[0] = threshold_base;
thresholds[1] = threshold_base;
thresholds[2] = threshold_base >> 2;
thresholds[3] = threshold_base >> 2;
thresholds[4] = threshold_base << 2;
} else {
// Increase partition thresholds for noisy content. Apply it only for
// superblocks where sumdiff is low, as we assume the sumdiff of superblock
// whose only change is due to noise will be low (i.e, noise will average
// out over large block).
if (cpi->noise_estimate.enabled && content_lowsumdiff &&
(cm->width * cm->height > 640 * 480) &&
cm->current_frame.frame_number > 60) {
NOISE_LEVEL noise_level =
av1_noise_estimate_extract_level(&cpi->noise_estimate);
if (noise_level == kHigh)
threshold_base = (5 * threshold_base) >> 1;
else if (noise_level == kMedium &&
!cpi->sf.rt_sf.force_large_partition_blocks)
threshold_base = (5 * threshold_base) >> 2;
}
// TODO(kyslov) Enable var based partition adjusment on temporal denoising
#if 0 // CONFIG_AV1_TEMPORAL_DENOISING
if (cpi->oxcf.noise_sensitivity > 0 && denoise_svc(cpi) &&
cpi->oxcf.speed > 5 && cpi->denoiser.denoising_level >= kDenLow)
threshold_base =
av1_scale_part_thresh(threshold_base, cpi->denoiser.denoising_level,
content_state, cpi->svc.temporal_layer_id);
else
threshold_base =
scale_part_thresh_content(threshold_base, cpi->oxcf.speed, cm->width,
cm->height, cpi->svc.non_reference_frame);
#else
// Increase base variance threshold based on content_state/sum_diff level.
threshold_base =
scale_part_thresh_content(threshold_base, cpi->oxcf.speed, cm->width,
cm->height, cpi->svc.non_reference_frame);
#endif
thresholds[0] = threshold_base >> 1;
thresholds[1] = threshold_base;
thresholds[3] = threshold_base << cpi->oxcf.speed;
if (cm->width >= 1280 && cm->height >= 720)
thresholds[3] = thresholds[3] << 1;
if (cm->width * cm->height <= 352 * 288) {
if (current_qindex >= QINDEX_HIGH_THR) {
threshold_base = (5 * threshold_base) >> 1;
thresholds[1] = threshold_base >> 3;
thresholds[2] = threshold_base << 2;
thresholds[3] = threshold_base << 5;
} else if (current_qindex < QINDEX_LOW_THR) {
thresholds[1] = threshold_base >> 3;
thresholds[2] = threshold_base >> 1;
thresholds[3] = threshold_base << 3;
} else {
int64_t qi_diff_low = current_qindex - QINDEX_LOW_THR;
int64_t qi_diff_high = QINDEX_HIGH_THR - current_qindex;
int64_t threshold_diff = QINDEX_HIGH_THR - QINDEX_LOW_THR;
int64_t threshold_base_high = (5 * threshold_base) >> 1;
threshold_diff = threshold_diff > 0 ? threshold_diff : 1;
threshold_base = (qi_diff_low * threshold_base_high +
qi_diff_high * threshold_base) /
threshold_diff;
thresholds[1] = threshold_base >> 3;
thresholds[2] = ((qi_diff_low * threshold_base) +
qi_diff_high * (threshold_base >> 1)) /
threshold_diff;
thresholds[3] = ((qi_diff_low * (threshold_base << 5)) +
qi_diff_high * (threshold_base << 3)) /
threshold_diff;
}
} else if (cm->width < 1280 && cm->height < 720) {
thresholds[2] = (5 * threshold_base) >> 2;
} else if (cm->width < 1920 && cm->height < 1080) {
thresholds[2] = threshold_base << 1;
} else {
thresholds[2] = (5 * threshold_base) >> 1;
}
if (cpi->sf.rt_sf.force_large_partition_blocks) {
if (cm->width * cm->height <= 352 * 288) {
thresholds[1] <<= 2;
thresholds[2] <<= 5;
thresholds[3] = INT32_MAX;
} else if (cm->width * cm->height > 640 * 480 && segment_id == 0) {
thresholds[0] = (3 * thresholds[0]) >> 1;
thresholds[3] = INT32_MAX;
if (current_qindex >= QINDEX_LARGE_BLOCK_THR) {
thresholds[1] <<= 1;
thresholds[2] <<= 1;
}
} else if (current_qindex > QINDEX_LARGE_BLOCK_THR && segment_id == 0) {
thresholds[1] <<= 2;
thresholds[2] <<= 5;
thresholds[3] = INT32_MAX;
}
}
}
}
// Set temporal variance low flag for superblock 64x64.
// Only first 25 in the array are used in this case.
static AOM_INLINE void set_low_temp_var_flag_64x64(
CommonModeInfoParams *mi_params, PartitionSearchInfo *part_info,
MACROBLOCKD *xd, VP64x64 *vt, const int64_t thresholds[], int mi_col,
int mi_row) {
if (xd->mi[0]->bsize == BLOCK_64X64) {
if ((vt->part_variances).none.variance < (thresholds[0] >> 1))
part_info->variance_low[0] = 1;
} else if (xd->mi[0]->bsize == BLOCK_64X32) {
for (int i = 0; i < 2; i++) {
if (vt->part_variances.horz[i].variance < (thresholds[0] >> 2))
part_info->variance_low[i + 1] = 1;
}
} else if (xd->mi[0]->bsize == BLOCK_32X64) {
for (int i = 0; i < 2; i++) {
if (vt->part_variances.vert[i].variance < (thresholds[0] >> 2))
part_info->variance_low[i + 3] = 1;
}
} else {
static const int idx[4][2] = { { 0, 0 }, { 0, 8 }, { 8, 0 }, { 8, 8 } };
for (int i = 0; i < 4; i++) {
const int idx_str =
mi_params->mi_stride * (mi_row + idx[i][0]) + mi_col + idx[i][1];
MB_MODE_INFO **this_mi = mi_params->mi_grid_base + idx_str;
if (mi_params->mi_cols <= mi_col + idx[i][1] ||
mi_params->mi_rows <= mi_row + idx[i][0])
continue;
if (*this_mi == NULL) continue;
if ((*this_mi)->bsize == BLOCK_32X32) {
int64_t threshold_32x32 = (5 * thresholds[1]) >> 3;
if (vt->split[i].part_variances.none.variance < threshold_32x32)
part_info->variance_low[i + 5] = 1;
} else {
// For 32x16 and 16x32 blocks, the flag is set on each 16x16 block
// inside.
if ((*this_mi)->bsize == BLOCK_16X16 ||
(*this_mi)->bsize == BLOCK_32X16 ||
(*this_mi)->bsize == BLOCK_16X32) {
for (int j = 0; j < 4; j++) {
if (vt->split[i].split[j].part_variances.none.variance <
(thresholds[2] >> 8))
part_info->variance_low[(i << 2) + j + 9] = 1;
}
}
}
}
}
}
static AOM_INLINE void set_low_temp_var_flag_128x128(
CommonModeInfoParams *mi_params, PartitionSearchInfo *part_info,
MACROBLOCKD *xd, VP128x128 *vt, const int64_t thresholds[], int mi_col,
int mi_row) {
if (xd->mi[0]->bsize == BLOCK_128X128) {
if (vt->part_variances.none.variance < (thresholds[0] >> 1))
part_info->variance_low[0] = 1;
} else if (xd->mi[0]->bsize == BLOCK_128X64) {
for (int i = 0; i < 2; i++) {
if (vt->part_variances.horz[i].variance < (thresholds[0] >> 2))
part_info->variance_low[i + 1] = 1;
}
} else if (xd->mi[0]->bsize == BLOCK_64X128) {
for (int i = 0; i < 2; i++) {
if (vt->part_variances.vert[i].variance < (thresholds[0] >> 2))
part_info->variance_low[i + 3] = 1;
}
} else {
static const int idx64[4][2] = {
{ 0, 0 }, { 0, 16 }, { 16, 0 }, { 16, 16 }
};
static const int idx32[4][2] = { { 0, 0 }, { 0, 8 }, { 8, 0 }, { 8, 8 } };
for (int i = 0; i < 4; i++) {
const int idx_str =
mi_params->mi_stride * (mi_row + idx64[i][0]) + mi_col + idx64[i][1];
MB_MODE_INFO **mi_64 = mi_params->mi_grid_base + idx_str;
if (*mi_64 == NULL) continue;
if (mi_params->mi_cols <= mi_col + idx64[i][1] ||
mi_params->mi_rows <= mi_row + idx64[i][0])
continue;
const int64_t threshold_64x64 = (5 * thresholds[1]) >> 3;
if ((*mi_64)->bsize == BLOCK_64X64) {
if (vt->split[i].part_variances.none.variance < threshold_64x64)
part_info->variance_low[5 + i] = 1;
} else if ((*mi_64)->bsize == BLOCK_64X32) {
for (int j = 0; j < 2; j++)
if (vt->split[i].part_variances.horz[j].variance <
(threshold_64x64 >> 1))
part_info->variance_low[9 + (i << 1) + j] = 1;
} else if ((*mi_64)->bsize == BLOCK_32X64) {
for (int j = 0; j < 2; j++)
if (vt->split[i].part_variances.vert[j].variance <
(threshold_64x64 >> 1))
part_info->variance_low[17 + (i << 1) + j] = 1;
} else {
for (int k = 0; k < 4; k++) {
const int idx_str1 = mi_params->mi_stride * idx32[k][0] + idx32[k][1];
MB_MODE_INFO **mi_32 = mi_params->mi_grid_base + idx_str + idx_str1;
if (*mi_32 == NULL) continue;
if (mi_params->mi_cols <= mi_col + idx64[i][1] + idx32[k][1] ||
mi_params->mi_rows <= mi_row + idx64[i][0] + idx32[k][0])
continue;
const int64_t threshold_32x32 = (5 * thresholds[2]) >> 3;
if ((*mi_32)->bsize == BLOCK_32X32) {
if (vt->split[i].split[k].part_variances.none.variance <
threshold_32x32)
part_info->variance_low[25 + (i << 2) + k] = 1;
} else {
// For 32x16 and 16x32 blocks, the flag is set on each 16x16 block
// inside.
if ((*mi_32)->bsize == BLOCK_16X16 ||
(*mi_32)->bsize == BLOCK_32X16 ||
(*mi_32)->bsize == BLOCK_16X32) {
for (int j = 0; j < 4; j++) {
if (vt->split[i]
.split[k]
.split[j]
.part_variances.none.variance < (thresholds[3] >> 8))
part_info->variance_low[41 + (i << 4) + (k << 2) + j] = 1;
}
}
}
}
}
}
}
}
static AOM_INLINE void set_low_temp_var_flag(
AV1_COMP *cpi, PartitionSearchInfo *part_info, MACROBLOCKD *xd,
VP128x128 *vt, int64_t thresholds[], MV_REFERENCE_FRAME ref_frame_partition,
int mi_col, int mi_row) {
AV1_COMMON *const cm = &cpi->common;
const int mv_thr = cm->width > 640 ? 8 : 4;
// Check temporal variance for bsize >= 16x16, if LAST_FRAME was selected and
// int_pro mv is small. If the temporal variance is small set the flag
// variance_low for the block. The variance threshold can be adjusted, the
// higher the more aggressive.
if (ref_frame_partition == LAST_FRAME &&
(cpi->sf.rt_sf.short_circuit_low_temp_var == 1 ||
(cpi->sf.rt_sf.estimate_motion_for_var_based_partition &&
xd->mi[0]->mv[0].as_mv.col < mv_thr &&
xd->mi[0]->mv[0].as_mv.col > -mv_thr &&
xd->mi[0]->mv[0].as_mv.row < mv_thr &&
xd->mi[0]->mv[0].as_mv.row > -mv_thr))) {
const int is_small_sb = (cm->seq_params.sb_size == BLOCK_64X64);
if (is_small_sb)
set_low_temp_var_flag_64x64(&cm->mi_params, part_info, xd,
&(vt->split[0]), thresholds, mi_col, mi_row);
else
set_low_temp_var_flag_128x128(&cm->mi_params, part_info, xd, vt,
thresholds, mi_col, mi_row);
}
}
void av1_set_variance_partition_thresholds(AV1_COMP *cpi, int q,
int content_lowsumdiff) {
SPEED_FEATURES *const sf = &cpi->sf;
if (sf->part_sf.partition_search_type != VAR_BASED_PARTITION) {
return;
} else {
set_vbp_thresholds(cpi, cpi->vbp_info.thresholds, q, content_lowsumdiff, 0);
// The threshold below is not changed locally.
cpi->vbp_info.threshold_minmax = 15 + (q >> 3);
}
}
static AOM_INLINE void chroma_check(AV1_COMP *cpi, MACROBLOCK *x,
BLOCK_SIZE bsize, unsigned int y_sad,
int is_key_frame) {
int i;
MACROBLOCKD *xd = &x->e_mbd;
if (is_key_frame || cpi->oxcf.tool_cfg.enable_monochrome) return;
for (i = 1; i <= 2; ++i) {
unsigned int uv_sad = UINT_MAX;
struct macroblock_plane *p = &x->plane[i];
struct macroblockd_plane *pd = &xd->plane[i];
const BLOCK_SIZE bs =
get_plane_block_size(bsize, pd->subsampling_x, pd->subsampling_y);
if (bs != BLOCK_INVALID)
uv_sad = cpi->fn_ptr[bs].sdf(p->src.buf, p->src.stride, pd->dst.buf,
pd->dst.stride);
x->color_sensitivity[i - 1] = uv_sad > (y_sad >> 2);
}
}
static void fill_variance_tree_leaves(
AV1_COMP *cpi, MACROBLOCK *x, VP128x128 *vt, VP16x16 *vt2,
unsigned char *force_split, int avg_16x16[][4], int maxvar_16x16[][4],
int minvar_16x16[][4], int *variance4x4downsample, int64_t *thresholds,
uint8_t *src, int src_stride, const uint8_t *dst, int dst_stride) {
AV1_COMMON *cm = &cpi->common;
MACROBLOCKD *xd = &x->e_mbd;
const int is_key_frame = frame_is_intra_only(cm);
const int is_small_sb = (cm->seq_params.sb_size == BLOCK_64X64);
const int num_64x64_blocks = is_small_sb ? 1 : 4;
// TODO(kyslov) Bring back compute_minmax_variance with content type detection
const int compute_minmax_variance = 0;
const int segment_id = xd->mi[0]->segment_id;
int pixels_wide = 128, pixels_high = 128;
if (is_small_sb) {
pixels_wide = 64;
pixels_high = 64;
}
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);
for (int m = 0; m < num_64x64_blocks; m++) {
const int x64_idx = ((m & 1) << 6);
const int y64_idx = ((m >> 1) << 6);
const int m2 = m << 2;
force_split[m + 1] = 0;
for (int i = 0; i < 4; i++) {
const int x32_idx = x64_idx + ((i & 1) << 5);
const int y32_idx = y64_idx + ((i >> 1) << 5);
const int i2 = (m2 + i) << 2;
force_split[5 + m2 + i] = 0;
avg_16x16[m][i] = 0;
maxvar_16x16[m][i] = 0;
minvar_16x16[m][i] = INT_MAX;
for (int j = 0; j < 4; j++) {
const int x16_idx = x32_idx + ((j & 1) << 4);
const int y16_idx = y32_idx + ((j >> 1) << 4);
const int split_index = 21 + i2 + j;
VP16x16 *vst = &vt->split[m].split[i].split[j];
force_split[split_index] = 0;
variance4x4downsample[i2 + j] = 0;
if (!is_key_frame) {
fill_variance_8x8avg(src, src_stride, dst, dst_stride, x16_idx,
y16_idx, vst,
#if CONFIG_AV1_HIGHBITDEPTH
xd->cur_buf->flags,
#endif
pixels_wide, pixels_high, is_key_frame);
fill_variance_tree(&vt->split[m].split[i].split[j], BLOCK_16X16);
get_variance(&vt->split[m].split[i].split[j].part_variances.none);
avg_16x16[m][i] +=
vt->split[m].split[i].split[j].part_variances.none.variance;
if (vt->split[m].split[i].split[j].part_variances.none.variance <
minvar_16x16[m][i])
minvar_16x16[m][i] =
vt->split[m].split[i].split[j].part_variances.none.variance;
if (vt->split[m].split[i].split[j].part_variances.none.variance >
maxvar_16x16[m][i])
maxvar_16x16[m][i] =
vt->split[m].split[i].split[j].part_variances.none.variance;
if (vt->split[m].split[i].split[j].part_variances.none.variance >
thresholds[3]) {
// 16X16 variance is above threshold for split, so force split to
// 8x8 for this 16x16 block (this also forces splits for upper
// levels).
force_split[split_index] = 1;
force_split[5 + m2 + i] = 1;
force_split[m + 1] = 1;
force_split[0] = 1;
} else if (!cyclic_refresh_segment_id_boosted(segment_id) &&
compute_minmax_variance &&
vt->split[m]
.split[i]
.split[j]
.part_variances.none.variance > thresholds[2]) {
// We have some nominal amount of 16x16 variance (based on average),
// compute the minmax over the 8x8 sub-blocks, and if above
// threshold, force split to 8x8 block for this 16x16 block.
int minmax = compute_minmax_8x8(src, src_stride, dst, dst_stride,
x16_idx, y16_idx,
#if CONFIG_AV1_HIGHBITDEPTH
xd->cur_buf->flags,
#endif
pixels_wide, pixels_high);
int thresh_minmax = (int)cpi->vbp_info.threshold_minmax;
if (minmax > thresh_minmax) {
force_split[split_index] = 1;
force_split[5 + m2 + i] = 1;
force_split[m + 1] = 1;
force_split[0] = 1;
}
}
}
if (is_key_frame) {
force_split[split_index] = 0;
// Go down to 4x4 down-sampling for variance.
variance4x4downsample[i2 + j] = 1;
for (int k = 0; k < 4; k++) {
int x8_idx = x16_idx + ((k & 1) << 3);
int y8_idx = y16_idx + ((k >> 1) << 3);
VP8x8 *vst2 = is_key_frame ? &vst->split[k] : &vt2[i2 + j].split[k];
fill_variance_4x4avg(src, src_stride, dst, dst_stride, x8_idx,
y8_idx, vst2,
#if CONFIG_AV1_HIGHBITDEPTH
xd->cur_buf->flags,
#endif
pixels_wide, pixels_high, is_key_frame);
}
}
}
}
}
}
static void setup_planes(AV1_COMP *cpi, MACROBLOCK *x, unsigned int *y_sad,
unsigned int *y_sad_g,
MV_REFERENCE_FRAME *ref_frame_partition, int mi_row,
int mi_col) {
AV1_COMMON *const cm = &cpi->common;
MACROBLOCKD *xd = &x->e_mbd;
const int num_planes = av1_num_planes(cm);
const int is_small_sb = (cm->seq_params.sb_size == BLOCK_64X64);
BLOCK_SIZE bsize = is_small_sb ? BLOCK_64X64 : BLOCK_128X128;
// TODO(kyslov): we are assuming that the ref is LAST_FRAME! Check if it
// is!!
MB_MODE_INFO *mi = xd->mi[0];
const YV12_BUFFER_CONFIG *yv12 = get_ref_frame_yv12_buf(cm, LAST_FRAME);
assert(yv12 != NULL);
const YV12_BUFFER_CONFIG *yv12_g = NULL;
// For non-SVC GOLDEN is another temporal reference. Check if it should be
// used as reference for partitioning.
if (!cpi->use_svc && (cpi->ref_frame_flags & AOM_GOLD_FLAG) &&
cpi->sf.rt_sf.use_nonrd_pick_mode) {
yv12_g = get_ref_frame_yv12_buf(cm, GOLDEN_FRAME);
if (yv12_g && yv12_g != yv12) {
av1_setup_pre_planes(xd, 0, yv12_g, mi_row, mi_col,
get_ref_scale_factors(cm, GOLDEN_FRAME), num_planes);
*y_sad_g = cpi->fn_ptr[bsize].sdf(
x->plane[0].src.buf, x->plane[0].src.stride, xd->plane[0].pre[0].buf,
xd->plane[0].pre[0].stride);
}
}
av1_setup_pre_planes(xd, 0, yv12, mi_row, mi_col,
get_ref_scale_factors(cm, LAST_FRAME), num_planes);
mi->ref_frame[0] = LAST_FRAME;
mi->ref_frame[1] = NONE_FRAME;
mi->bsize = cm->seq_params.sb_size;
mi->mv[0].as_int = 0;
mi->interp_filters = av1_broadcast_interp_filter(BILINEAR);
if (cpi->sf.rt_sf.estimate_motion_for_var_based_partition) {
if (xd->mb_to_right_edge >= 0 && xd->mb_to_bottom_edge >= 0) {
const MV dummy_mv = { 0, 0 };
*y_sad = av1_int_pro_motion_estimation(cpi, x, cm->seq_params.sb_size,
mi_row, mi_col, &dummy_mv);
}
}
if (*y_sad == UINT_MAX) {
*y_sad = cpi->fn_ptr[bsize].sdf(x->plane[0].src.buf, x->plane[0].src.stride,
xd->plane[0].pre[0].buf,
xd->plane[0].pre[0].stride);
}
// Pick the ref frame for partitioning, use golden frame only if its
// lower sad.
aom_clear_system_state();
if (*y_sad_g < 0.9 * *y_sad) {
av1_setup_pre_planes(xd, 0, yv12_g, mi_row, mi_col,
get_ref_scale_factors(cm, GOLDEN_FRAME), num_planes);
mi->ref_frame[0] = GOLDEN_FRAME;
mi->mv[0].as_int = 0;
*y_sad = *y_sad_g;
*ref_frame_partition = GOLDEN_FRAME;
x->nonrd_prune_ref_frame_search = 0;
} else {
*ref_frame_partition = LAST_FRAME;
x->nonrd_prune_ref_frame_search =
cpi->sf.rt_sf.nonrd_prune_ref_frame_search;
}
set_ref_ptrs(cm, xd, mi->ref_frame[0], mi->ref_frame[1]);
av1_enc_build_inter_predictor(cm, xd, mi_row, mi_col, NULL,
cm->seq_params.sb_size, AOM_PLANE_Y,
AOM_PLANE_Y);
}
int av1_choose_var_based_partitioning(AV1_COMP *cpi, const TileInfo *const tile,
ThreadData *td, MACROBLOCK *x, int mi_row,
int mi_col) {
AV1_COMMON *const cm = &cpi->common;
MACROBLOCKD *xd = &x->e_mbd;
const int64_t *const vbp_thresholds = cpi->vbp_info.thresholds;
int i, j, k, m;
VP128x128 *vt;
VP16x16 *vt2 = NULL;
unsigned char force_split[85];
int avg_32x32;
int avg_64x64;
int max_var_32x32[4];
int min_var_32x32[4];
int var_32x32;
int var_64x64;
int min_var_64x64 = INT_MAX;
int max_var_64x64 = 0;
int avg_16x16[4][4];
int maxvar_16x16[4][4];
int minvar_16x16[4][4];
int64_t threshold_4x4avg;
uint8_t *s;
const uint8_t *d;
int sp;
int dp;
NOISE_LEVEL noise_level = kLow;
int is_key_frame =
(frame_is_intra_only(cm) ||
(cpi->use_svc &&
cpi->svc.layer_context[cpi->svc.temporal_layer_id].is_key_frame));
assert(cm->seq_params.sb_size == BLOCK_64X64 ||
cm->seq_params.sb_size == BLOCK_128X128);
const int is_small_sb = (cm->seq_params.sb_size == BLOCK_64X64);
const int num_64x64_blocks = is_small_sb ? 1 : 4;
unsigned int y_sad = UINT_MAX;
unsigned int y_sad_g = UINT_MAX;
BLOCK_SIZE bsize = is_small_sb ? BLOCK_64X64 : BLOCK_128X128;
// Ref frame used in partitioning.
MV_REFERENCE_FRAME ref_frame_partition = LAST_FRAME;
CHECK_MEM_ERROR(cm, vt, aom_malloc(sizeof(*vt)));
vt->split = td->vt64x64;
int64_t thresholds[5] = { vbp_thresholds[0], vbp_thresholds[1],
vbp_thresholds[2], vbp_thresholds[3],
vbp_thresholds[4] };
const int low_res = (cm->width <= 352 && cm->height <= 288);
int variance4x4downsample[64];
const int segment_id = xd->mi[0]->segment_id;
if (cpi->oxcf.q_cfg.aq_mode == CYCLIC_REFRESH_AQ && cm->seg.enabled &&
cyclic_refresh_segment_id_boosted(segment_id) &&
cpi->sf.rt_sf.use_nonrd_pick_mode) {
int q = av1_get_qindex(&cm->seg, segment_id, cm->quant_params.base_qindex);
set_vbp_thresholds(cpi, thresholds, q, x->content_state_sb.low_sumdiff, 1);
} else {
set_vbp_thresholds(cpi, thresholds, cm->quant_params.base_qindex,
x->content_state_sb.low_sumdiff, 0);
}
// For non keyframes, disable 4x4 average for low resolution when speed = 8
threshold_4x4avg = INT64_MAX;
s = x->plane[0].src.buf;
sp = x->plane[0].src.stride;
// Index for force_split: 0 for 64x64, 1-4 for 32x32 blocks,
// 5-20 for the 16x16 blocks.
force_split[0] = 0;
memset(x->part_search_info.variance_low, 0,
sizeof(x->part_search_info.variance_low));
// Check if LAST frame is NULL or if the resolution of LAST is
// different than the current frame resolution, and if so, treat this frame
// as a key frame, for the purpose of the superblock partitioning.
// LAST == NULL can happen in cases where enhancement spatial layers are
// enabled dyanmically and the only reference is the spatial(GOLDEN).
// TODO(marpan): Check se of scaled references for the different resoln.
if (!frame_is_intra_only(cm)) {
const YV12_BUFFER_CONFIG *const ref =
get_ref_frame_yv12_buf(cm, LAST_FRAME);
if (ref == NULL || ref->y_crop_height != cm->height ||
ref->y_crop_width != cm->width) {
is_key_frame = 1;
}
}
if (!is_key_frame) {
setup_planes(cpi, x, &y_sad, &y_sad_g, &ref_frame_partition, mi_row,
mi_col);
d = xd->plane[0].dst.buf;
dp = xd->plane[0].dst.stride;
} else {
d = AV1_VAR_OFFS;
dp = 0;
}
if (cpi->noise_estimate.enabled)
noise_level = av1_noise_estimate_extract_level(&cpi->noise_estimate);
if (low_res && threshold_4x4avg < INT64_MAX)
CHECK_MEM_ERROR(cm, vt2, aom_malloc(sizeof(*vt2)));
// Fill in the entire tree of 8x8 (or 4x4 under some conditions) variances
// for splits.
fill_variance_tree_leaves(cpi, x, vt, vt2, force_split, avg_16x16,
maxvar_16x16, minvar_16x16, variance4x4downsample,
thresholds, s, sp, d, dp);
avg_64x64 = 0;
for (m = 0; m < num_64x64_blocks; ++m) {
avg_32x32 = 0;
max_var_32x32[m] = 0;
min_var_32x32[m] = INT_MAX;
const int m2 = m << 2;
for (i = 0; i < 4; i++) {
const int i2 = (m2 + i) << 2;
for (j = 0; j < 4; j++) {
const int split_index = 21 + i2 + j;
if (variance4x4downsample[i2 + j] == 1) {
VP16x16 *vtemp =
(!is_key_frame) ? &vt2[i2 + j] : &vt->split[m].split[i].split[j];
for (k = 0; k < 4; k++)
fill_variance_tree(&vtemp->split[k], BLOCK_8X8);
fill_variance_tree(vtemp, BLOCK_16X16);
// If variance of this 16x16 block is above the threshold, force block
// to split. This also forces a split on the upper levels.
get_variance(&vtemp->part_variances.none);
if (vtemp->part_variances.none.variance > thresholds[3]) {
force_split[split_index] = 1;
force_split[5 + m2 + i] = 1;
force_split[m + 1] = 1;
force_split[0] = 1;
}
}
}
fill_variance_tree(&vt->split[m].split[i], BLOCK_32X32);
// If variance of this 32x32 block is above the threshold, or if its above
// (some threshold of) the average variance over the sub-16x16 blocks,
// then force this block to split. This also forces a split on the upper
// (64x64) level.
if (!force_split[5 + m2 + i]) {
get_variance(&vt->split[m].split[i].part_variances.none);
var_32x32 = vt->split[m].split[i].part_variances.none.variance;
max_var_32x32[m] = AOMMAX(var_32x32, max_var_32x32[m]);
min_var_32x32[m] = AOMMIN(var_32x32, min_var_32x32[m]);
if (vt->split[m].split[i].part_variances.none.variance >
thresholds[2] ||
(!is_key_frame &&
vt->split[m].split[i].part_variances.none.variance >
(thresholds[2] >> 1) &&
vt->split[m].split[i].part_variances.none.variance >
(avg_16x16[m][i] >> 1))) {
force_split[5 + m2 + i] = 1;
force_split[m + 1] = 1;
force_split[0] = 1;
} else if (!is_key_frame && cm->height <= 360 &&
(maxvar_16x16[m][i] - minvar_16x16[m][i]) >
(thresholds[2] >> 1) &&
maxvar_16x16[m][i] > thresholds[2]) {
force_split[5 + m2 + i] = 1;
force_split[m + 1] = 1;
force_split[0] = 1;
}
avg_32x32 += var_32x32;
}
}
if (!force_split[1 + m]) {
fill_variance_tree(&vt->split[m], BLOCK_64X64);
get_variance(&vt->split[m].part_variances.none);
var_64x64 = vt->split[m].part_variances.none.variance;
max_var_64x64 = AOMMAX(var_64x64, max_var_64x64);
min_var_64x64 = AOMMIN(var_64x64, min_var_64x64);
// If the difference of the max-min variances of sub-blocks or max
// variance of a sub-block is above some threshold of then force this
// block to split. Only checking this for noise level >= medium, if
// encoder is in SVC or if we already forced large blocks.
if (!is_key_frame &&
(max_var_32x32[m] - min_var_32x32[m]) > 3 * (thresholds[1] >> 3) &&
max_var_32x32[m] > thresholds[1] >> 1 &&
(noise_level >= kMedium || cpi->use_svc ||
cpi->sf.rt_sf.force_large_partition_blocks)) {
force_split[1 + m] = 1;
force_split[0] = 1;
}
avg_64x64 += var_64x64;
}
if (is_small_sb) force_split[0] = 1;
}
if (!force_split[0]) {
fill_variance_tree(vt, BLOCK_128X128);
get_variance(&vt->part_variances.none);
if (!is_key_frame &&
vt->part_variances.none.variance > (9 * avg_64x64) >> 5)
force_split[0] = 1;
if (!is_key_frame &&
(max_var_64x64 - min_var_64x64) > 3 * (thresholds[0] >> 3) &&
max_var_64x64 > thresholds[0] >> 1)
force_split[0] = 1;
}
if (mi_col + 32 > tile->mi_col_end || mi_row + 32 > tile->mi_row_end ||
!set_vt_partitioning(cpi, x, xd, tile, vt, BLOCK_128X128, mi_row, mi_col,
thresholds[0], BLOCK_16X16, force_split[0])) {
for (m = 0; m < num_64x64_blocks; ++m) {
const int x64_idx = ((m & 1) << 4);
const int y64_idx = ((m >> 1) << 4);
const int m2 = m << 2;
// Now go through the entire structure, splitting every block size until
// we get to one that's got a variance lower than our threshold.
if (!set_vt_partitioning(cpi, x, xd, tile, &vt->split[m], BLOCK_64X64,
mi_row + y64_idx, mi_col + x64_idx,
thresholds[1], BLOCK_16X16,
force_split[1 + m])) {
for (i = 0; i < 4; ++i) {
const int x32_idx = ((i & 1) << 3);
const int y32_idx = ((i >> 1) << 3);
const int i2 = (m2 + i) << 2;
if (!set_vt_partitioning(cpi, x, xd, tile, &vt->split[m].split[i],
BLOCK_32X32, (mi_row + y64_idx + y32_idx),
(mi_col + x64_idx + x32_idx), thresholds[2],
BLOCK_16X16, force_split[5 + m2 + i])) {
for (j = 0; j < 4; ++j) {
const int x16_idx = ((j & 1) << 2);
const int y16_idx = ((j >> 1) << 2);
const int split_index = 21 + i2 + j;
// For inter frames: if variance4x4downsample[] == 1 for this
// 16x16 block, then the variance is based on 4x4 down-sampling,
// so use vt2 in set_vt_partioning(), otherwise use vt.
VP16x16 *vtemp =
(!is_key_frame && variance4x4downsample[i2 + j] == 1)
? &vt2[i2 + j]
: &vt->split[m].split[i].split[j];
if (!set_vt_partitioning(cpi, x, xd, tile, vtemp, BLOCK_16X16,
mi_row + y64_idx + y32_idx + y16_idx,
mi_col + x64_idx + x32_idx + x16_idx,
thresholds[3], BLOCK_8X8,
force_split[split_index])) {
for (k = 0; k < 4; ++k) {
const int x8_idx = (k & 1) << 1;
const int y8_idx = (k >> 1) << 1;
set_block_size(
cpi, x, xd,
(mi_row + y64_idx + y32_idx + y16_idx + y8_idx),
(mi_col + x64_idx + x32_idx + x16_idx + x8_idx),
BLOCK_8X8);
}
}
}
}
}
}
}
}
if (cpi->sf.rt_sf.short_circuit_low_temp_var) {
set_low_temp_var_flag(cpi, &x->part_search_info, xd, vt, thresholds,
ref_frame_partition, mi_col, mi_row);
}
chroma_check(cpi, x, bsize, y_sad, is_key_frame);
if (vt2) aom_free(vt2);
if (vt) aom_free(vt);
return 0;
}