| /* |
| * 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" |
| #include "av1/encoder/subgop.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 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; |
| gf_group->cur_frame_idx[*frame_ind] = *cur_frame_idx; |
| 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); |
| ++(*cur_frame_idx); |
| } |
| } 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->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, 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->arf_boost[*frame_ind] = 0; |
| gf_group->layer_depth[*frame_ind] = layer_depth; |
| ++(*frame_ind); |
| ++(*cur_frame_idx); |
| |
| // Frames displayed after this internal ARF. |
| set_multi_layer_params(twopass, gf_group, rc, frame_info, m, end, |
| cur_frame_idx, frame_ind, layer_depth + 1); |
| } |
| } |
| |
| static int find_backward_alt_ref(const SubGOPCfg *subgop_cfg, int cur_idx) { |
| int cur_disp_idx = subgop_cfg->step[cur_idx].disp_frame_idx; |
| int cur_pyr_level = subgop_cfg->step[cur_idx].pyr_level; |
| int bwd_alt_ref_disp_idx = 0; |
| |
| for (int i = 0; i < cur_idx; ++i) { |
| int disp_idx = subgop_cfg->step[i].disp_frame_idx; |
| int pyr_level = subgop_cfg->step[i].pyr_level; |
| if (pyr_level < cur_pyr_level && disp_idx < cur_disp_idx) { |
| if (disp_idx > bwd_alt_ref_disp_idx) bwd_alt_ref_disp_idx = disp_idx; |
| } |
| } |
| |
| return bwd_alt_ref_disp_idx; |
| } |
| |
| static int find_forward_alt_ref(const SubGOPCfg *subgop_cfg, int cur_idx) { |
| int cur_disp_idx = subgop_cfg->step[cur_idx].disp_frame_idx; |
| int cur_pyr_level = subgop_cfg->step[cur_idx].pyr_level; |
| int fwd_alt_ref_disp_idx = subgop_cfg->num_frames; |
| |
| for (int i = 0; i < cur_idx; ++i) { |
| int disp_idx = subgop_cfg->step[i].disp_frame_idx; |
| int pyr_level = subgop_cfg->step[i].pyr_level; |
| if (pyr_level < cur_pyr_level && disp_idx > cur_disp_idx) { |
| if (disp_idx < fwd_alt_ref_disp_idx) fwd_alt_ref_disp_idx = disp_idx; |
| } |
| } |
| |
| return fwd_alt_ref_disp_idx; |
| } |
| |
| static void set_multi_layer_params_from_subgop_cfg( |
| const TWO_PASS *twopass, GF_GROUP *const gf_group, |
| const SubGOPCfg *subgop_cfg, RATE_CONTROL *rc, FRAME_INFO *frame_info, |
| int *cur_frame_idx, int *frame_index) { |
| int last_shown_frame = 0; |
| int min_pyr_level = MAX_ARF_LAYERS; |
| |
| for (int idx = 0; idx < subgop_cfg->num_steps; ++idx) { |
| const SubGOPStepCfg *frame = &subgop_cfg->step[idx]; |
| |
| if (frame->pyr_level < min_pyr_level) min_pyr_level = frame->pyr_level; |
| } |
| |
| for (int idx = 0; idx < subgop_cfg->num_steps; ++idx) { |
| const SubGOPStepCfg *frame = &subgop_cfg->step[idx]; |
| FRAME_TYPE_CODE type = frame->type_code; |
| int pyr_level = frame->pyr_level; |
| int disp_idx = frame->disp_frame_idx; |
| |
| if (type == FRAME_TYPE_OOO_FILTERED || |
| type == FRAME_TYPE_OOO_UNFILTERED) { // ARF |
| gf_group->update_type[*frame_index] = |
| pyr_level == min_pyr_level ? ARF_UPDATE : INTNL_ARF_UPDATE; |
| if (pyr_level == min_pyr_level) { |
| gf_group->arf_index = *frame_index; |
| gf_group->arf_boost[*frame_index] = rc->gfu_boost; |
| } else { |
| int fwd_arf_disp_idx = find_forward_alt_ref(subgop_cfg, idx); |
| int bwd_arf_disp_idx = find_backward_alt_ref(subgop_cfg, idx); |
| gf_group->arf_boost[*frame_index] = av1_calc_arf_boost( |
| twopass, rc, frame_info, disp_idx, fwd_arf_disp_idx - disp_idx, |
| disp_idx - bwd_arf_disp_idx, NULL, NULL); |
| } |
| gf_group->arf_src_offset[*frame_index] = disp_idx - last_shown_frame - 1; |
| } else if (type == FRAME_TYPE_INO_VISIBLE) { // Leaf |
| gf_group->update_type[*frame_index] = |
| pyr_level == min_pyr_level ? GF_UPDATE : LF_UPDATE; |
| |
| int fwd_arf_disp_idx = find_forward_alt_ref(subgop_cfg, idx); |
| gf_group->arf_boost[*frame_index] = |
| av1_calc_arf_boost(twopass, rc, frame_info, disp_idx, |
| fwd_arf_disp_idx - disp_idx, 0, NULL, NULL); |
| gf_group->arf_src_offset[*frame_index] = 0; |
| last_shown_frame = disp_idx; |
| |
| (*cur_frame_idx)++; |
| } else if (type == FRAME_TYPE_INO_REPEAT || |
| type == FRAME_TYPE_INO_SHOWEXISTING) { // Overlay |
| gf_group->update_type[*frame_index] = |
| pyr_level == min_pyr_level ? OVERLAY_UPDATE : INTNL_OVERLAY_UPDATE; |
| gf_group->arf_boost[*frame_index] = 0; |
| gf_group->arf_src_offset[*frame_index] = 0; |
| last_shown_frame = disp_idx; |
| (*cur_frame_idx)++; |
| } |
| gf_group->is_filtered[*frame_index] = (type == FRAME_TYPE_OOO_FILTERED); |
| gf_group->cur_frame_idx[*frame_index] = *cur_frame_idx; |
| gf_group->layer_depth[*frame_index] = pyr_level; |
| gf_group->max_layer_depth = AOMMAX(gf_group->max_layer_depth, pyr_level); |
| |
| if (idx != (subgop_cfg->num_steps - 1)) (*frame_index)++; |
| } |
| for (int idx = 1; idx <= *frame_index; idx++) { |
| if (gf_group->layer_depth[idx] == gf_group->max_layer_depth) |
| gf_group->layer_depth[idx] = MAX_ARF_LAYERS; |
| } |
| } |
| |
| 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; |
| int cur_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); |
| |
| if (first_frame_update_type == KF_UPDATE && |
| cpi->oxcf.kf_cfg.enable_keyframe_filtering > 1) { |
| gf_group->has_overlay_for_key_frame = 1; |
| gf_group->update_type[frame_index] = KFFLT_UPDATE; |
| gf_group->arf_src_offset[frame_index] = 0; |
| gf_group->cur_frame_idx[frame_index] = cur_frame_index; |
| gf_group->layer_depth[frame_index] = 0; |
| gf_group->max_layer_depth = 0; |
| ++frame_index; |
| |
| gf_group->update_type[frame_index] = KFFLT_OVERLAY_UPDATE; |
| gf_group->arf_src_offset[frame_index] = 0; |
| gf_group->cur_frame_idx[frame_index] = cur_frame_index; |
| gf_group->layer_depth[frame_index] = 0; |
| gf_group->max_layer_depth = 0; |
| ++frame_index; |
| cur_frame_index++; |
| } else { |
| 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] = cur_frame_index; |
| 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; |
| ++cur_frame_index; |
| } |
| |
| // Rest of the frames. |
| SubGOPSetCfg *subgop_cfg_set = &cpi->subgop_config_set; |
| gf_group->subgop_cfg = NULL; |
| gf_group->is_user_specified = 0; |
| const SubGOPCfg *subgop_cfg; |
| subgop_cfg = av1_find_subgop_config(subgop_cfg_set, gf_interval, |
| rc->frames_to_key - 1 <= gf_interval + 2, |
| first_frame_update_type == KF_UPDATE); |
| if (subgop_cfg) { |
| gf_group->subgop_cfg = subgop_cfg; |
| gf_group->is_user_specified = 1; |
| set_multi_layer_params_from_subgop_cfg(twopass, gf_group, subgop_cfg, rc, |
| frame_info, &cur_frame_index, |
| &frame_index); |
| } else { |
| // 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] = cur_frame_index; |
| gf_group->layer_depth[frame_index] = 1; |
| gf_group->arf_boost[frame_index] = cpi->rc.gfu_boost; |
| gf_group->max_layer_depth = 1; |
| gf_group->arf_index = frame_index; |
| ++frame_index; |
| } else { |
| gf_group->arf_index = -1; |
| } |
| set_multi_layer_params(twopass, gf_group, rc, frame_info, 0, gf_interval, |
| &cur_frame_index, &frame_index, 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", "KFFLT_UPDATE", "KFFLT_OVERLAY_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 |
| |
| 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->is_user_specified = 0; |
| gf_group->has_overlay_for_key_frame = 0; |
| if (cpi->print_per_frame_stats) { |
| printf("baseline_gf_interval = %d\n", rc->baseline_gf_interval); |
| } |
| gf_group->size = construct_multi_layer_gf_structure( |
| cpi, twopass, gf_group, rc, frame_info, rc->baseline_gf_interval, |
| first_frame_update_type); |
| cpi->rc.level1_qp = -1; // Set to uninitialized. |
| |
| #if CHECK_GF_PARAMETER |
| check_frame_params(gf_group, rc->baseline_gf_interval); |
| #endif |
| } |
