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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 <stdint.h>
#include "config/aom_config.h"
#include "config/aom_scale_rtcd.h"
#include "aom/aom_codec.h"
#include "aom/aom_encoder.h"
#include "aom_ports/system_state.h"
#include "av1/common/av1_common_int.h"
#include "av1/encoder/encoder.h"
#include "av1/encoder/firstpass.h"
#include "av1/encoder/gop_structure.h"
// Set parameters for frames between 'start' and 'end' (excluding both).
static void set_multi_layer_params(const TWO_PASS *twopass,
GF_GROUP *const gf_group, RATE_CONTROL *rc,
FRAME_INFO *frame_info, int start, int end,
int *cur_frame_idx, int *frame_ind,
int arf_ind, int layer_depth) {
const int num_frames_to_process = end - start - 1;
assert(num_frames_to_process >= 0);
if (num_frames_to_process == 0) return;
// Either we are at the last level of the pyramid, or we don't have enough
// frames between 'l' and 'r' to create one more level.
if (layer_depth > gf_group->max_layer_depth_allowed ||
num_frames_to_process < 3) {
// Leaf nodes.
while (++start < end) {
gf_group->update_type[*frame_ind] = LF_UPDATE;
gf_group->arf_src_offset[*frame_ind] = 0;
++*cur_frame_idx;
gf_group->cur_frame_idx[*frame_ind] = *cur_frame_idx;
gf_group->frame_disp_idx[*frame_ind] = start;
gf_group->layer_depth[*frame_ind] = MAX_ARF_LAYERS;
gf_group->arf_boost[*frame_ind] = av1_calc_arf_boost(
twopass, rc, frame_info, start, end - start, 0, NULL, NULL);
gf_group->max_layer_depth =
AOMMAX(gf_group->max_layer_depth, layer_depth);
++(*frame_ind);
}
} else {
const int m = (start + end) / 2;
// Internal ARF.
gf_group->update_type[*frame_ind] = INTNL_ARF_UPDATE;
gf_group->arf_src_offset[*frame_ind] = m - start - 1;
gf_group->cur_frame_idx[*frame_ind] = *cur_frame_idx;
gf_group->frame_disp_idx[*frame_ind] = m;
gf_group->layer_depth[*frame_ind] = layer_depth;
// Get the boost factor for intermediate ARF frames.
gf_group->arf_boost[*frame_ind] = av1_calc_arf_boost(
twopass, rc, frame_info, m, end - m, m - start, NULL, NULL);
++(*frame_ind);
// Frames displayed before this internal ARF.
set_multi_layer_params(twopass, gf_group, rc, frame_info, start, m,
cur_frame_idx, frame_ind, 1, layer_depth + 1);
// Overlay for internal ARF.
gf_group->update_type[*frame_ind] = INTNL_OVERLAY_UPDATE;
gf_group->arf_src_offset[*frame_ind] = 0;
gf_group->cur_frame_idx[*frame_ind] = *cur_frame_idx;
gf_group->frame_disp_idx[*frame_ind] = m;
gf_group->arf_boost[*frame_ind] = 0;
gf_group->layer_depth[*frame_ind] = layer_depth;
++(*frame_ind);
// Frames displayed after this internal ARF.
set_multi_layer_params(twopass, gf_group, rc, frame_info, m, end,
cur_frame_idx, frame_ind, arf_ind, layer_depth + 1);
}
}
static int construct_multi_layer_gf_structure(
AV1_COMP *cpi, TWO_PASS *twopass, GF_GROUP *const gf_group,
RATE_CONTROL *rc, FRAME_INFO *const frame_info, int gf_interval,
FRAME_UPDATE_TYPE first_frame_update_type) {
int frame_index = 0;
// Keyframe / Overlay frame / Golden frame.
assert(gf_interval >= 1);
assert(first_frame_update_type == KF_UPDATE ||
first_frame_update_type == OVERLAY_UPDATE ||
first_frame_update_type == GF_UPDATE);
gf_group->update_type[frame_index] = first_frame_update_type;
gf_group->arf_src_offset[frame_index] = 0;
gf_group->cur_frame_idx[frame_index] = 0;
gf_group->layer_depth[frame_index] =
first_frame_update_type == OVERLAY_UPDATE ? MAX_ARF_LAYERS + 1 : 0;
gf_group->max_layer_depth = 0;
++frame_index;
// ALTREF.
const int use_altref = gf_group->max_layer_depth_allowed > 0;
if (use_altref) {
gf_group->update_type[frame_index] = ARF_UPDATE;
gf_group->arf_src_offset[frame_index] = gf_interval - 1;
gf_group->cur_frame_idx[frame_index] = 0;
gf_group->frame_disp_idx[frame_index] = gf_interval;
gf_group->layer_depth[frame_index] = 1;
gf_group->arf_boost[frame_index] = cpi->rc.gfu_boost;
gf_group->max_layer_depth = 1;
++frame_index;
}
int cur_frame_index = 0;
// Rest of the frames.
set_multi_layer_params(twopass, gf_group, rc, frame_info, 0, gf_interval,
&cur_frame_index, &frame_index, 0, use_altref + 1);
// The end frame will be Overlay frame for an ARF GOP; otherwise set it to
// be GF, for consistency, which will be updated in the next GOP.
gf_group->update_type[frame_index] = use_altref ? OVERLAY_UPDATE : GF_UPDATE;
gf_group->arf_src_offset[frame_index] = 0;
return frame_index;
}
#define CHECK_GF_PARAMETER 0
#if CHECK_GF_PARAMETER
void check_frame_params(GF_GROUP *const gf_group, int gf_interval) {
static const char *update_type_strings[FRAME_UPDATE_TYPES] = {
"KF_UPDATE", "LF_UPDATE", "GF_UPDATE",
"ARF_UPDATE", "OVERLAY_UPDATE", "INTNL_OVERLAY_UPDATE",
"INTNL_ARF_UPDATE"
};
FILE *fid = fopen("GF_PARAMS.txt", "a");
fprintf(fid, "\ngf_interval = {%d}\n", gf_interval);
for (int i = 0; i < gf_group->size; ++i) {
fprintf(fid, "#%2d : %s %d %d %d %d\n", i,
update_type_strings[gf_group->update_type[i]],
gf_group->arf_src_offset[i], gf_group->arf_pos_in_gf[i],
gf_group->arf_update_idx[i], gf_group->pyramid_level[i]);
}
fprintf(fid, "number of nodes in each level: \n");
for (int i = 0; i < gf_group->pyramid_height; ++i) {
fprintf(fid, "lvl %d: %d ", i, gf_group->pyramid_lvl_nodes[i]);
}
fprintf(fid, "\n");
fclose(fid);
}
#endif // CHECK_GF_PARAMETER
#define REF_IDX(ref) ((ref)-LAST_FRAME)
static INLINE void reset_ref_frame_idx(int *ref_idx, int reset_value) {
for (int i = 0; i < REF_FRAMES; ++i) ref_idx[i] = reset_value;
}
static INLINE void set_ref_frame_disp_idx(GF_GROUP *const gf_group) {
for (int i = 0; i < gf_group->size; ++i) {
for (int ref = 0; ref < INTER_REFS_PER_FRAME + 1; ++ref) {
int ref_gop_idx = gf_group->ref_frame_gop_idx[i][ref];
if (ref_gop_idx == -1) {
gf_group->ref_frame_disp_idx[i][ref] = -1;
} else {
gf_group->ref_frame_disp_idx[i][ref] =
gf_group->frame_disp_idx[ref_gop_idx];
}
}
}
}
static void set_gop_ref_frame_map(GF_GROUP *const gf_group) {
// Initialize the reference slots as all -1.
for (int frame_idx = 0; frame_idx < gf_group->size; ++frame_idx)
reset_ref_frame_idx(gf_group->ref_frame_gop_idx[frame_idx], -1);
// Set the map for frames in the current gop
for (int frame_idx = 0; frame_idx < gf_group->size; ++frame_idx) {
const FRAME_UPDATE_TYPE update_type = gf_group->update_type[frame_idx];
// TODO(yuec): need to figure out how to determine
// (1) whether a KEY_FRAME has show_frame on
// (2) whether a frame with INTNL_OVERLAY_UPDATE type has
// show_existing_frame on
const int show_frame =
update_type != ARF_UPDATE && update_type != INTNL_ARF_UPDATE;
const int show_existing_frame =
update_type == OVERLAY_UPDATE || update_type == INTNL_OVERLAY_UPDATE;
int this_ref_map[INTER_REFS_PER_FRAME + 1];
memcpy(this_ref_map, gf_group->ref_frame_gop_idx[frame_idx],
sizeof(this_ref_map));
int *next_ref_map = &gf_group->ref_frame_gop_idx[frame_idx + 1][0];
switch (update_type) {
case KF_UPDATE:
if (show_frame) {
reset_ref_frame_idx(this_ref_map, frame_idx);
} else {
this_ref_map[REF_IDX(LAST3_FRAME)] = frame_idx;
this_ref_map[REF_IDX(EXTREF_FRAME)] = frame_idx;
this_ref_map[REF_IDX(ALTREF2_FRAME)] = frame_idx;
this_ref_map[REF_IDX(GOLDEN_FRAME)] = frame_idx;
this_ref_map[REF_IDX(ALTREF_FRAME)] = frame_idx;
}
break;
case LF_UPDATE: this_ref_map[REF_IDX(LAST3_FRAME)] = frame_idx; break;
case GF_UPDATE:
this_ref_map[REF_IDX(LAST3_FRAME)] = frame_idx;
this_ref_map[REF_IDX(GOLDEN_FRAME)] = frame_idx;
break;
case OVERLAY_UPDATE:
this_ref_map[REF_IDX(ALTREF_FRAME)] = frame_idx;
break;
case ARF_UPDATE: this_ref_map[REF_IDX(ALTREF_FRAME)] = frame_idx; break;
case INTNL_OVERLAY_UPDATE:
if (!show_existing_frame)
this_ref_map[REF_IDX(LAST3_FRAME)] = frame_idx;
break;
case INTNL_ARF_UPDATE:
this_ref_map[REF_IDX(EXTREF_FRAME)] = frame_idx;
break;
default: assert(0); break;
}
memcpy(next_ref_map, this_ref_map, sizeof(this_ref_map));
switch (update_type) {
case LF_UPDATE:
case GF_UPDATE:
next_ref_map[REF_IDX(LAST3_FRAME)] = this_ref_map[REF_IDX(LAST2_FRAME)];
next_ref_map[REF_IDX(LAST2_FRAME)] = this_ref_map[REF_IDX(LAST_FRAME)];
next_ref_map[REF_IDX(LAST_FRAME)] = this_ref_map[REF_IDX(LAST3_FRAME)];
break;
case INTNL_OVERLAY_UPDATE:
if (!show_existing_frame) {
next_ref_map[REF_IDX(LAST3_FRAME)] =
this_ref_map[REF_IDX(LAST2_FRAME)];
next_ref_map[REF_IDX(LAST2_FRAME)] =
this_ref_map[REF_IDX(LAST_FRAME)];
next_ref_map[REF_IDX(LAST_FRAME)] =
this_ref_map[REF_IDX(LAST3_FRAME)];
} else {
next_ref_map[REF_IDX(LAST_FRAME)] =
this_ref_map[REF_IDX(BWDREF_FRAME)];
next_ref_map[REF_IDX(LAST2_FRAME)] =
this_ref_map[REF_IDX(LAST_FRAME)];
next_ref_map[REF_IDX(LAST3_FRAME)] =
this_ref_map[REF_IDX(LAST2_FRAME)];
next_ref_map[REF_IDX(BWDREF_FRAME)] =
this_ref_map[REF_IDX(ALTREF2_FRAME)];
next_ref_map[REF_IDX(ALTREF2_FRAME)] =
this_ref_map[REF_IDX(EXTREF_FRAME)];
next_ref_map[REF_IDX(EXTREF_FRAME)] =
this_ref_map[REF_IDX(LAST3_FRAME)];
}
break;
case INTNL_ARF_UPDATE:
if (!show_existing_frame) {
next_ref_map[REF_IDX(BWDREF_FRAME)] =
this_ref_map[REF_IDX(EXTREF_FRAME)];
next_ref_map[REF_IDX(ALTREF2_FRAME)] =
this_ref_map[REF_IDX(BWDREF_FRAME)];
next_ref_map[REF_IDX(EXTREF_FRAME)] =
this_ref_map[REF_IDX(ALTREF2_FRAME)];
}
break;
case OVERLAY_UPDATE:
next_ref_map[REF_IDX(ALTREF_FRAME)] =
this_ref_map[REF_IDX(GOLDEN_FRAME)];
next_ref_map[REF_IDX(GOLDEN_FRAME)] =
this_ref_map[REF_IDX(ALTREF_FRAME)];
break;
default: break;
}
}
// Set the map in display order index by converting from gop indices in the
// above map
set_ref_frame_disp_idx(gf_group);
}
void av1_gop_setup_structure(AV1_COMP *cpi,
const EncodeFrameParams *const frame_params) {
RATE_CONTROL *const rc = &cpi->rc;
GF_GROUP *const gf_group = &cpi->gf_group;
TWO_PASS *const twopass = &cpi->twopass;
FRAME_INFO *const frame_info = &cpi->frame_info;
const int key_frame = (frame_params->frame_type == KEY_FRAME);
const FRAME_UPDATE_TYPE first_frame_update_type =
key_frame ? KF_UPDATE
: rc->source_alt_ref_active ? OVERLAY_UPDATE : GF_UPDATE;
gf_group->size = construct_multi_layer_gf_structure(
cpi, twopass, gf_group, rc, frame_info, rc->baseline_gf_interval,
first_frame_update_type);
set_gop_ref_frame_map(gf_group);
#if CHECK_GF_PARAMETER
check_frame_params(gf_group, rc->baseline_gf_interval);
#endif
}