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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include <limits.h>
#include "config/av1_rtcd.h"
#include "config/aom_dsp_rtcd.h"
#include "aom_dsp/aom_dsp_common.h"
#include "aom_mem/aom_mem.h"
#include "aom_ports/system_state.h"
#include "av1/encoder/segmentation.h"
#include "av1/encoder/mcomp.h"
#include "av1/common/blockd.h"
#include "av1/common/reconinter.h"
#include "av1/common/reconintra.h"
static unsigned int do_16x16_motion_iteration(AV1_COMP *cpi, const MV *ref_mv,
int mb_row, int mb_col) {
MACROBLOCK *const x = &cpi->td.mb;
MACROBLOCKD *const xd = &x->e_mbd;
const MV_SPEED_FEATURES *const mv_sf = &cpi->sf.mv;
const aom_variance_fn_ptr_t v_fn_ptr = cpi->fn_ptr[BLOCK_16X16];
const MvLimits tmp_mv_limits = x->mv_limits;
MV ref_full;
int cost_list[5];
// Further step/diamond searches as necessary
int step_param = mv_sf->reduce_first_step_size;
step_param = AOMMIN(step_param, MAX_MVSEARCH_STEPS - 2);
av1_set_mv_search_range(&x->mv_limits, ref_mv);
ref_full.col = ref_mv->col >> 3;
ref_full.row = ref_mv->row >> 3;
/*cpi->sf.search_method == HEX*/
av1_hex_search(x, &ref_full, step_param, x->errorperbit, 0,
cond_cost_list(cpi, cost_list), &v_fn_ptr, 0, ref_mv);
// Try sub-pixel MC
// if (bestsme > error_thresh && bestsme < INT_MAX)
if (cpi->common.cur_frame_force_integer_mv == 1) {
x->best_mv.as_mv.row *= 8;
x->best_mv.as_mv.col *= 8;
} else {
int distortion;
unsigned int sse;
cpi->find_fractional_mv_step(
x, &cpi->common, mb_row, mb_col, ref_mv,
cpi->common.allow_high_precision_mv, x->errorperbit, &v_fn_ptr, 0,
mv_sf->subpel_iters_per_step, cond_cost_list(cpi, cost_list), NULL,
NULL, &distortion, &sse, NULL, NULL, 0, 0, 0, 0, 0);
}
if (has_second_ref(xd->mi[0]))
xd->mi[0]->mode = NEW_NEWMV;
else
xd->mi[0]->mode = NEWMV;
xd->mi[0]->mv[0] = x->best_mv;
xd->mi[0]->ref_frame[1] = NONE_FRAME;
av1_build_inter_predictors_sby(&cpi->common, xd, mb_row, mb_col, NULL,
BLOCK_16X16);
/* restore UMV window */
x->mv_limits = tmp_mv_limits;
return aom_sad16x16(x->plane[0].src.buf, x->plane[0].src.stride,
xd->plane[0].dst.buf, xd->plane[0].dst.stride);
}
static int do_16x16_motion_search(AV1_COMP *cpi, const MV *ref_mv, int mb_row,
int mb_col) {
MACROBLOCK *const x = &cpi->td.mb;
MACROBLOCKD *const xd = &x->e_mbd;
unsigned int err, tmp_err;
MV best_mv;
// Try zero MV first
// FIXME should really use something like near/nearest MV and/or MV prediction
err = aom_sad16x16(x->plane[0].src.buf, x->plane[0].src.stride,
xd->plane[0].pre[0].buf, xd->plane[0].pre[0].stride);
best_mv.col = best_mv.row = 0;
// Test last reference frame using the previous best mv as the
// starting point (best reference) for the search
tmp_err = do_16x16_motion_iteration(cpi, ref_mv, mb_row, mb_col);
if (tmp_err < err) {
err = tmp_err;
best_mv = x->best_mv.as_mv;
}
// If the current best reference mv is not centered on 0,0 then do a 0,0
// based search as well.
if (ref_mv->row != 0 || ref_mv->col != 0) {
MV zero_ref_mv = kZeroMv;
tmp_err = do_16x16_motion_iteration(cpi, &zero_ref_mv, mb_row, mb_col);
if (tmp_err < err) {
err = tmp_err;
best_mv = x->best_mv.as_mv;
}
}
x->best_mv.as_mv = best_mv;
return err;
}
static int do_16x16_zerozero_search(AV1_COMP *cpi, int_mv *dst_mv) {
MACROBLOCK *const x = &cpi->td.mb;
MACROBLOCKD *const xd = &x->e_mbd;
unsigned int err;
// Try zero MV first
// FIXME should really use something like near/nearest MV and/or MV prediction
err = aom_sad16x16(x->plane[0].src.buf, x->plane[0].src.stride,
xd->plane[0].pre[0].buf, xd->plane[0].pre[0].stride);
dst_mv->as_int = 0;
return err;
}
static int find_best_16x16_intra(AV1_COMP *cpi, PREDICTION_MODE *pbest_mode) {
const AV1_COMMON *cm = &cpi->common;
MACROBLOCK *const x = &cpi->td.mb;
MACROBLOCKD *const xd = &x->e_mbd;
PREDICTION_MODE best_mode = -1, mode;
unsigned int best_err = INT_MAX;
// calculate SATD for each intra prediction mode;
// we're intentionally not doing 4x4, we just want a rough estimate
for (mode = DC_PRED; mode <= PAETH_PRED; mode++) {
unsigned int err;
xd->mi[0]->mode = mode;
av1_predict_intra_block(cm, xd, 16, 16, TX_16X16, mode, 0, 0,
FILTER_INTRA_MODES, x->plane[0].src.buf,
x->plane[0].src.stride, xd->plane[0].dst.buf,
xd->plane[0].dst.stride, 0, 0, 0);
err = aom_sad16x16(x->plane[0].src.buf, x->plane[0].src.stride,
xd->plane[0].dst.buf, xd->plane[0].dst.stride);
// find best
if (err < best_err) {
best_err = err;
best_mode = mode;
}
}
if (pbest_mode) *pbest_mode = best_mode;
return best_err;
}
static void update_mbgraph_mb_stats(AV1_COMP *cpi, MBGRAPH_MB_STATS *stats,
YV12_BUFFER_CONFIG *buf, int mb_y_offset,
YV12_BUFFER_CONFIG *golden_ref,
const MV *prev_golden_ref_mv,
YV12_BUFFER_CONFIG *alt_ref, int mb_row,
int mb_col) {
MACROBLOCK *const x = &cpi->td.mb;
MACROBLOCKD *const xd = &x->e_mbd;
int intra_error;
AV1_COMMON *cm = &cpi->common;
// FIXME in practice we're completely ignoring chroma here
x->plane[0].src.buf = buf->y_buffer + mb_y_offset;
x->plane[0].src.stride = buf->y_stride;
xd->plane[0].dst.buf = get_frame_new_buffer(cm)->y_buffer + mb_y_offset;
xd->plane[0].dst.stride = get_frame_new_buffer(cm)->y_stride;
// do intra 16x16 prediction
intra_error = find_best_16x16_intra(cpi, &stats->ref[INTRA_FRAME].m.mode);
if (intra_error <= 0) intra_error = 1;
stats->ref[INTRA_FRAME].err = intra_error;
// Golden frame MV search, if it exists and is different than last frame
if (golden_ref) {
int g_motion_error;
xd->plane[0].pre[0].buf = golden_ref->y_buffer + mb_y_offset;
xd->plane[0].pre[0].stride = golden_ref->y_stride;
g_motion_error =
do_16x16_motion_search(cpi, prev_golden_ref_mv, mb_row, mb_col);
stats->ref[GOLDEN_FRAME].m.mv = x->best_mv;
stats->ref[GOLDEN_FRAME].err = g_motion_error;
} else {
stats->ref[GOLDEN_FRAME].err = INT_MAX;
stats->ref[GOLDEN_FRAME].m.mv.as_int = 0;
}
// Do an Alt-ref frame MV search, if it exists and is different than
// last/golden frame.
if (alt_ref) {
int a_motion_error;
xd->plane[0].pre[0].buf = alt_ref->y_buffer + mb_y_offset;
xd->plane[0].pre[0].stride = alt_ref->y_stride;
a_motion_error =
do_16x16_zerozero_search(cpi, &stats->ref[ALTREF_FRAME].m.mv);
stats->ref[ALTREF_FRAME].err = a_motion_error;
} else {
stats->ref[ALTREF_FRAME].err = INT_MAX;
stats->ref[ALTREF_FRAME].m.mv.as_int = 0;
}
}
static void update_mbgraph_frame_stats(AV1_COMP *cpi,
MBGRAPH_FRAME_STATS *stats,
YV12_BUFFER_CONFIG *buf,
YV12_BUFFER_CONFIG *golden_ref,
YV12_BUFFER_CONFIG *alt_ref) {
MACROBLOCK *const x = &cpi->td.mb;
MACROBLOCKD *const xd = &x->e_mbd;
AV1_COMMON *const cm = &cpi->common;
int mb_col, mb_row, offset = 0;
int mb_y_offset = 0, arf_y_offset = 0, gld_y_offset = 0;
MV gld_top_mv = kZeroMv;
MB_MODE_INFO mi_local;
av1_zero(mi_local);
// Set up limit values for motion vectors to prevent them extending outside
// the UMV borders.
x->mv_limits.row_min = -BORDER_MV_PIXELS_B16;
x->mv_limits.row_max = (cm->mb_rows - 1) * 8 + BORDER_MV_PIXELS_B16;
xd->up_available = 0;
xd->plane[0].dst.stride = buf->y_stride;
xd->plane[0].pre[0].stride = buf->y_stride;
xd->plane[1].dst.stride = buf->uv_stride;
xd->mi[0] = &mi_local;
mi_local.sb_type = BLOCK_16X16;
mi_local.ref_frame[0] = LAST_FRAME;
mi_local.ref_frame[1] = NONE_FRAME;
for (mb_row = 0; mb_row < cm->mb_rows; mb_row++) {
MV gld_left_mv = gld_top_mv;
int mb_y_in_offset = mb_y_offset;
int arf_y_in_offset = arf_y_offset;
int gld_y_in_offset = gld_y_offset;
// Set up limit values for motion vectors to prevent them extending outside
// the UMV borders.
x->mv_limits.col_min = -BORDER_MV_PIXELS_B16;
x->mv_limits.col_max = (cm->mb_cols - 1) * 8 + BORDER_MV_PIXELS_B16;
xd->left_available = 0;
for (mb_col = 0; mb_col < cm->mb_cols; mb_col++) {
MBGRAPH_MB_STATS *mb_stats = &stats->mb_stats[offset + mb_col];
update_mbgraph_mb_stats(cpi, mb_stats, buf, mb_y_in_offset, golden_ref,
&gld_left_mv, alt_ref, mb_row, mb_col);
gld_left_mv = mb_stats->ref[GOLDEN_FRAME].m.mv.as_mv;
if (mb_col == 0) {
gld_top_mv = gld_left_mv;
}
xd->left_available = 1;
mb_y_in_offset += 16;
gld_y_in_offset += 16;
arf_y_in_offset += 16;
x->mv_limits.col_min -= 16;
x->mv_limits.col_max -= 16;
}
xd->up_available = 1;
mb_y_offset += buf->y_stride * 16;
gld_y_offset += golden_ref->y_stride * 16;
if (alt_ref) arf_y_offset += alt_ref->y_stride * 16;
x->mv_limits.row_min -= 16;
x->mv_limits.row_max -= 16;
offset += cm->mb_cols;
}
}
// void separate_arf_mbs_byzz
static void separate_arf_mbs(AV1_COMP *cpi) {
AV1_COMMON *const cm = &cpi->common;
int mb_col, mb_row, offset, i;
int mi_row, mi_col;
int ncnt[4] = { 0 };
int n_frames = cpi->mbgraph_n_frames;
int *arf_not_zz;
CHECK_MEM_ERROR(
cm, arf_not_zz,
aom_calloc(cm->mb_rows * cm->mb_cols * sizeof(*arf_not_zz), 1));
// We are not interested in results beyond the alt ref itself.
if (n_frames > cpi->rc.frames_till_gf_update_due)
n_frames = cpi->rc.frames_till_gf_update_due;
// defer cost to reference frames
for (i = n_frames - 1; i >= 0; i--) {
MBGRAPH_FRAME_STATS *frame_stats = &cpi->mbgraph_stats[i];
for (offset = 0, mb_row = 0; mb_row < cm->mb_rows;
offset += cm->mb_cols, mb_row++) {
for (mb_col = 0; mb_col < cm->mb_cols; mb_col++) {
MBGRAPH_MB_STATS *mb_stats = &frame_stats->mb_stats[offset + mb_col];
int altref_err = mb_stats->ref[ALTREF_FRAME].err;
int intra_err = mb_stats->ref[INTRA_FRAME].err;
int golden_err = mb_stats->ref[GOLDEN_FRAME].err;
// Test for altref vs intra and gf and that its mv was 0,0.
if (altref_err > 1000 || altref_err > intra_err ||
altref_err > golden_err) {
arf_not_zz[offset + mb_col]++;
}
}
}
}
// arf_not_zz is indexed by MB, but this loop is indexed by MI to avoid out
// of bound access in segmentation_map
for (mi_row = 0; mi_row < cm->mi_rows; mi_row++) {
for (mi_col = 0; mi_col < cm->mi_cols; mi_col++) {
// If any of the blocks in the sequence failed then the MB
// goes in segment 0
if (arf_not_zz[mi_row / 2 * cm->mb_cols + mi_col / 2]) {
ncnt[0]++;
cpi->segmentation_map[mi_row * cm->mi_cols + mi_col] = 0;
} else {
cpi->segmentation_map[mi_row * cm->mi_cols + mi_col] = 1;
ncnt[1]++;
}
}
}
// Only bother with segmentation if over 10% of the MBs in static segment
// if ( ncnt[1] && (ncnt[0] / ncnt[1] < 10) )
if (1) {
// Note % of blocks that are marked as static
if (cm->MBs)
cpi->static_mb_pct = (ncnt[1] * 100) / (cm->mi_rows * cm->mi_cols);
// This error case should not be reachable as this function should
// never be called with the common data structure uninitialized.
else
cpi->static_mb_pct = 0;
av1_enable_segmentation(&cm->seg);
} else {
cpi->static_mb_pct = 0;
av1_disable_segmentation(&cm->seg);
}
// Free localy allocated storage
aom_free(arf_not_zz);
}
void av1_update_mbgraph_stats(AV1_COMP *cpi) {
AV1_COMMON *const cm = &cpi->common;
int i, n_frames = av1_lookahead_depth(cpi->lookahead);
YV12_BUFFER_CONFIG *golden_ref = get_ref_frame_buffer(cpi, GOLDEN_FRAME);
assert(golden_ref != NULL);
// we need to look ahead beyond where the ARF transitions into
// being a GF - so exit if we don't look ahead beyond that
if (n_frames <= cpi->rc.frames_till_gf_update_due) return;
if (n_frames > MAX_LAG_BUFFERS) n_frames = MAX_LAG_BUFFERS;
cpi->mbgraph_n_frames = n_frames;
for (i = 0; i < n_frames; i++) {
MBGRAPH_FRAME_STATS *frame_stats = &cpi->mbgraph_stats[i];
memset(frame_stats->mb_stats, 0,
cm->mb_rows * cm->mb_cols * sizeof(*cpi->mbgraph_stats[i].mb_stats));
}
// do motion search to find contribution of each reference to data
// later on in this GF group
// FIXME really, the GF/last MC search should be done forward, and
// the ARF MC search backwards, to get optimal results for MV caching
for (i = 0; i < n_frames; i++) {
MBGRAPH_FRAME_STATS *frame_stats = &cpi->mbgraph_stats[i];
struct lookahead_entry *q_cur = av1_lookahead_peek(cpi->lookahead, i);
assert(q_cur != NULL);
update_mbgraph_frame_stats(cpi, frame_stats, &q_cur->img, golden_ref,
cpi->source);
}
aom_clear_system_state();
separate_arf_mbs(cpi);
}