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| -rw-r--r-- | third_party/aom/av1/encoder/gop_structure.c | 867 |
1 files changed, 867 insertions, 0 deletions
diff --git a/third_party/aom/av1/encoder/gop_structure.c b/third_party/aom/av1/encoder/gop_structure.c new file mode 100644 index 0000000000..5078098450 --- /dev/null +++ b/third_party/aom/av1/encoder/gop_structure.c @@ -0,0 +1,867 @@ +/* + * 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 "av1/common/blockd.h" +#include "config/aom_config.h" +#include "config/aom_scale_rtcd.h" + +#include "aom/aom_codec.h" +#include "aom/aom_encoder.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/pass2_strategy.h" + +// This function sets gf_group->frame_parallel_level for LF_UPDATE frames based +// on the value of parallel_frame_count. +static void set_frame_parallel_level(int *frame_parallel_level, + int *parallel_frame_count, + int max_parallel_frames) { + assert(*parallel_frame_count > 0); + // parallel_frame_count > 1 indicates subsequent frame(s) in the current + // parallel encode set. + *frame_parallel_level = 1 + (*parallel_frame_count > 1); + // Update the count of no. of parallel frames. + (*parallel_frame_count)++; + if (*parallel_frame_count > max_parallel_frames) *parallel_frame_count = 1; +} + +// This function sets gf_group->src_offset based on frame_parallel_level. +// Outputs are gf_group->src_offset and first_frame_index +static void set_src_offset(GF_GROUP *const gf_group, int *first_frame_index, + int cur_frame_idx, int frame_ind) { + if (gf_group->frame_parallel_level[frame_ind] > 0) { + if (gf_group->frame_parallel_level[frame_ind] == 1) { + *first_frame_index = cur_frame_idx; + } + + // Obtain the offset of the frame at frame_ind in the lookahead queue by + // subtracting the display order hints of the current frame from the display + // order hint of the first frame in parallel encoding set (at + // first_frame_index). + gf_group->src_offset[frame_ind] = + (cur_frame_idx + gf_group->arf_src_offset[frame_ind]) - + *first_frame_index; + } +} + +// Sets the GF_GROUP params for LF_UPDATE frames. +static AOM_INLINE void set_params_for_leaf_frames( + const TWO_PASS *twopass, const TWO_PASS_FRAME *twopass_frame, + const PRIMARY_RATE_CONTROL *p_rc, FRAME_INFO *frame_info, + GF_GROUP *const gf_group, int *cur_frame_idx, int *frame_ind, + int *parallel_frame_count, int max_parallel_frames, + int do_frame_parallel_encode, int *first_frame_index, int *cur_disp_index, + int layer_depth, int start, int 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->frame_type[*frame_ind] = INTER_FRAME; + gf_group->refbuf_state[*frame_ind] = REFBUF_UPDATE; + gf_group->max_layer_depth = AOMMAX(gf_group->max_layer_depth, layer_depth); + gf_group->display_idx[*frame_ind] = (*cur_disp_index); + gf_group->arf_boost[*frame_ind] = + av1_calc_arf_boost(twopass, twopass_frame, p_rc, frame_info, start, + end - start, 0, NULL, NULL, 0); + ++(*cur_disp_index); + + // Set the level of parallelism for the LF_UPDATE frame. + if (do_frame_parallel_encode) { + set_frame_parallel_level(&gf_group->frame_parallel_level[*frame_ind], + parallel_frame_count, max_parallel_frames); + // Set LF_UPDATE frames as non-reference frames. + gf_group->is_frame_non_ref[*frame_ind] = true; + } + set_src_offset(gf_group, first_frame_index, *cur_frame_idx, *frame_ind); + + ++(*frame_ind); + ++(*cur_frame_idx); +} + +// Sets the GF_GROUP params for INTNL_OVERLAY_UPDATE frames. +static AOM_INLINE void set_params_for_intnl_overlay_frames( + GF_GROUP *const gf_group, int *cur_frame_idx, int *frame_ind, + int *first_frame_index, int *cur_disp_index, int layer_depth) { + 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->layer_depth[*frame_ind] = layer_depth; + gf_group->frame_type[*frame_ind] = INTER_FRAME; + gf_group->refbuf_state[*frame_ind] = REFBUF_UPDATE; + gf_group->display_idx[*frame_ind] = (*cur_disp_index); + ++(*cur_disp_index); + + set_src_offset(gf_group, first_frame_index, *cur_frame_idx, *frame_ind); + ++(*frame_ind); + ++(*cur_frame_idx); +} + +// Sets the GF_GROUP params for INTNL_ARF_UPDATE frames. +static AOM_INLINE void set_params_for_internal_arfs( + const TWO_PASS *twopass, const TWO_PASS_FRAME *twopass_frame, + const PRIMARY_RATE_CONTROL *p_rc, FRAME_INFO *frame_info, + GF_GROUP *const gf_group, int *cur_frame_idx, int *frame_ind, + int *parallel_frame_count, int max_parallel_frames, + int do_frame_parallel_encode, int *first_frame_index, int depth_thr, + int *cur_disp_idx, int layer_depth, int arf_src_offset, int offset, + int f_frames, int b_frames) { + gf_group->update_type[*frame_ind] = INTNL_ARF_UPDATE; + gf_group->arf_src_offset[*frame_ind] = arf_src_offset; + gf_group->cur_frame_idx[*frame_ind] = *cur_frame_idx; + gf_group->layer_depth[*frame_ind] = layer_depth; + gf_group->frame_type[*frame_ind] = INTER_FRAME; + gf_group->refbuf_state[*frame_ind] = REFBUF_UPDATE; + gf_group->display_idx[*frame_ind] = + (*cur_disp_idx) + gf_group->arf_src_offset[*frame_ind]; + gf_group->arf_boost[*frame_ind] = + av1_calc_arf_boost(twopass, twopass_frame, p_rc, frame_info, offset, + f_frames, b_frames, NULL, NULL, 0); + + if (do_frame_parallel_encode) { + if (depth_thr != INT_MAX) { + assert(depth_thr == 3 || depth_thr == 4); + assert(IMPLIES(depth_thr == 3, layer_depth == 4)); + assert(IMPLIES(depth_thr == 4, layer_depth == 5)); + // Set frame_parallel_level of the first frame in the given layer to 1. + if (gf_group->layer_depth[(*frame_ind) - 1] != layer_depth) { + gf_group->frame_parallel_level[*frame_ind] = 1; + } else { + // Set frame_parallel_level of the consecutive frame in the same given + // layer to 2. + assert(gf_group->frame_parallel_level[(*frame_ind) - 1] == 1); + gf_group->frame_parallel_level[*frame_ind] = 2; + // Store the display order hints of the past 2 INTNL_ARF_UPDATE + // frames which would not have been displayed at the time of the encode + // of current frame. + gf_group->skip_frame_refresh[*frame_ind][0] = + gf_group->display_idx[(*frame_ind) - 1]; + gf_group->skip_frame_refresh[*frame_ind][1] = + gf_group->display_idx[(*frame_ind) - 2]; + // Set the display_idx of frame_parallel_level 1 frame in + // gf_group->skip_frame_as_ref. + gf_group->skip_frame_as_ref[*frame_ind] = + gf_group->display_idx[(*frame_ind) - 1]; + } + } + // If max_parallel_frames is not exceeded and if the frame will not be + // temporally filtered, encode the next internal ARF frame in parallel. + if (*parallel_frame_count > 1 && + *parallel_frame_count <= max_parallel_frames) { + if (gf_group->arf_src_offset[*frame_ind] < TF_LOOKAHEAD_IDX_THR) + gf_group->frame_parallel_level[*frame_ind] = 2; + *parallel_frame_count = 1; + } + } + set_src_offset(gf_group, first_frame_index, *cur_frame_idx, *frame_ind); + ++(*frame_ind); +} + +// Set parameters for frames between 'start' and 'end' (excluding both). +static void set_multi_layer_params_for_fp( + const TWO_PASS *twopass, const TWO_PASS_FRAME *twopass_frame, + GF_GROUP *const gf_group, const PRIMARY_RATE_CONTROL *p_rc, + RATE_CONTROL *rc, FRAME_INFO *frame_info, int start, int end, + int *cur_frame_idx, int *frame_ind, int *parallel_frame_count, + int max_parallel_frames, int do_frame_parallel_encode, + int *first_frame_index, int depth_thr, int *cur_disp_idx, int layer_depth) { + const int num_frames_to_process = end - start; + + // 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) { + set_params_for_leaf_frames(twopass, twopass_frame, p_rc, frame_info, + gf_group, cur_frame_idx, frame_ind, + parallel_frame_count, max_parallel_frames, + do_frame_parallel_encode, first_frame_index, + cur_disp_idx, layer_depth, start, end); + ++start; + } + } else { + const int m = (start + end - 1) / 2; + + // Internal ARF. + int arf_src_offset = m - start; + set_params_for_internal_arfs( + twopass, twopass_frame, p_rc, frame_info, gf_group, cur_frame_idx, + frame_ind, parallel_frame_count, max_parallel_frames, + do_frame_parallel_encode, first_frame_index, INT_MAX, cur_disp_idx, + layer_depth, arf_src_offset, m, end - m, m - start); + + // If encode reordering is enabled, configure the multi-layers accordingly + // and return. For e.g., the encode order for gf-interval 16 after + // reordering would be 0-> 16-> 8-> 4-> 2-> 6-> 1-> 3-> 5-> 7-> 12-> 10-> + // 14-> 9-> 11-> 13-> 15. + if (layer_depth >= depth_thr) { + int m1 = (m + start - 1) / 2; + int m2 = (m + 1 + end) / 2; + int arf_src_offsets[2] = { m1 - start, m2 - start }; + // Parameters to compute arf_boost. + int offset[2] = { m1, m2 }; + int f_frames[2] = { m - m1, end - m2 }; + int b_frames[2] = { m1 - start, m2 - (m + 1) }; + + // Set GF_GROUP params for INTNL_ARF_UPDATE frames which are reordered. + for (int i = 0; i < 2; i++) { + set_params_for_internal_arfs( + twopass, twopass_frame, p_rc, frame_info, gf_group, cur_frame_idx, + frame_ind, parallel_frame_count, max_parallel_frames, + do_frame_parallel_encode, first_frame_index, depth_thr, + cur_disp_idx, layer_depth + 1, arf_src_offsets[i], offset[i], + f_frames[i], b_frames[i]); + } + + // Initialize the start and end indices to configure LF_UPDATE frames. + int start_idx[4] = { start, m1 + 1, m + 1, end - 1 }; + int end_idx[4] = { m1, m, m2, end }; + int layer_depth_for_intnl_overlay[4] = { layer_depth + 1, layer_depth, + layer_depth + 1, INVALID_IDX }; + + // Set GF_GROUP params for the rest of LF_UPDATE and INTNL_OVERLAY_UPDATE + // frames after reordering. + for (int i = 0; i < 4; i++) { + set_multi_layer_params_for_fp( + twopass, twopass_frame, gf_group, p_rc, rc, frame_info, + start_idx[i], end_idx[i], cur_frame_idx, frame_ind, + parallel_frame_count, max_parallel_frames, do_frame_parallel_encode, + first_frame_index, depth_thr, cur_disp_idx, layer_depth + 2); + if (layer_depth_for_intnl_overlay[i] != INVALID_IDX) + set_params_for_intnl_overlay_frames( + gf_group, cur_frame_idx, frame_ind, first_frame_index, + cur_disp_idx, layer_depth_for_intnl_overlay[i]); + } + return; + } + + // Frames displayed before this internal ARF. + set_multi_layer_params_for_fp( + twopass, twopass_frame, gf_group, p_rc, rc, frame_info, start, m, + cur_frame_idx, frame_ind, parallel_frame_count, max_parallel_frames, + do_frame_parallel_encode, first_frame_index, depth_thr, cur_disp_idx, + layer_depth + 1); + + // Overlay for internal ARF. + set_params_for_intnl_overlay_frames(gf_group, cur_frame_idx, frame_ind, + first_frame_index, cur_disp_idx, + layer_depth); + + // Frames displayed after this internal ARF. + set_multi_layer_params_for_fp( + twopass, twopass_frame, gf_group, p_rc, rc, frame_info, m + 1, end, + cur_frame_idx, frame_ind, parallel_frame_count, max_parallel_frames, + do_frame_parallel_encode, first_frame_index, depth_thr, cur_disp_idx, + layer_depth + 1); + } +} + +// Structure for bookkeeping start, end and display indices to configure +// INTNL_ARF_UPDATE frames. +typedef struct { + int start; + int end; + int display_index; +} FRAME_REORDER_INFO; + +// Updates the stats required to configure the GF_GROUP. +static AOM_INLINE void fill_arf_frame_stats(FRAME_REORDER_INFO *arf_frame_stats, + int arf_frame_index, + int display_idx, int start, + int end) { + arf_frame_stats[arf_frame_index].start = start; + arf_frame_stats[arf_frame_index].end = end; + arf_frame_stats[arf_frame_index].display_index = display_idx; +} + +// Sets GF_GROUP params for INTNL_ARF_UPDATE frames. Also populates +// doh_gf_index_map and arf_frame_stats. +static AOM_INLINE void set_params_for_internal_arfs_in_gf14( + GF_GROUP *const gf_group, FRAME_REORDER_INFO *arf_frame_stats, + int *cur_frame_idx, int *cur_disp_idx, int *frame_ind, + int *count_arf_frames, int *doh_gf_index_map, int start, int end, + int layer_depth, int layer_with_parallel_encodes) { + int index = (start + end - 1) / 2; + gf_group->update_type[*frame_ind] = INTNL_ARF_UPDATE; + gf_group->arf_src_offset[*frame_ind] = index - 1; + gf_group->cur_frame_idx[*frame_ind] = *cur_frame_idx; + gf_group->layer_depth[*frame_ind] = layer_depth; + gf_group->frame_type[*frame_ind] = INTER_FRAME; + gf_group->refbuf_state[*frame_ind] = REFBUF_UPDATE; + gf_group->display_idx[*frame_ind] = + (*cur_disp_idx) + gf_group->arf_src_offset[*frame_ind]; + + // Update the display index of the current frame with its gf index. + doh_gf_index_map[index] = *frame_ind; + if (layer_with_parallel_encodes) { + assert(layer_depth == 4); + // Set frame_parallel_level of the first frame in the given layer depth + // to 1. + if (gf_group->layer_depth[(*frame_ind) - 1] != layer_depth) { + gf_group->frame_parallel_level[*frame_ind] = 1; + } else { + // Set frame_parallel_level of the consecutive frame in the same given + // layer depth to 2. + assert(gf_group->frame_parallel_level[(*frame_ind) - 1] == 1); + gf_group->frame_parallel_level[*frame_ind] = 2; + // Set the display_idx of frame_parallel_level 1 frame in + // gf_group->skip_frame_as_ref. + gf_group->skip_frame_as_ref[*frame_ind] = + gf_group->display_idx[(*frame_ind) - 1]; + } + } + ++(*frame_ind); + + // Update arf_frame_stats. + fill_arf_frame_stats(arf_frame_stats, *count_arf_frames, index, start, end); + ++(*count_arf_frames); +} + +// Sets GF_GROUP params for all INTNL_ARF_UPDATE frames in the given layer +// dpeth. +static AOM_INLINE void set_params_for_cur_layer_frames( + GF_GROUP *const gf_group, FRAME_REORDER_INFO *arf_frame_stats, + int *cur_frame_idx, int *cur_disp_idx, int *frame_ind, + int *count_arf_frames, int *doh_gf_index_map, int num_dir, int node_start, + int node_end, int layer_depth) { + assert(num_dir < 3); + int start, end; + // Iterate through the nodes in the previous layer depth. + for (int i = node_start; i < node_end; i++) { + // For each node, check if a frame can be coded as INTNL_ARF_UPDATE frame on + // either direction. + for (int dir = 0; dir < num_dir; dir++) { + // Checks for a frame to the left of current node. + if (dir == 0) { + start = arf_frame_stats[i].start; + end = arf_frame_stats[i].display_index; + } else { + // Checks for a frame to the right of current node. + start = arf_frame_stats[i].display_index + 1; + end = arf_frame_stats[i].end; + } + const int num_frames_to_process = end - start; + // Checks if a frame can be coded as INTNL_ARF_UPDATE frame. If + // num_frames_to_process is less than 3, then there are not enough frames + // between 'start' and 'end' to create another level. + if (num_frames_to_process >= 3) { + // Flag to indicate the lower layer depths for which parallel encoding + // is enabled. Currently enabled for layer 4 frames. + int layer_with_parallel_encodes = layer_depth == 4; + set_params_for_internal_arfs_in_gf14( + gf_group, arf_frame_stats, cur_frame_idx, cur_disp_idx, frame_ind, + count_arf_frames, doh_gf_index_map, start, end, layer_depth, + layer_with_parallel_encodes); + } + } + } +} + +// Configures multi-layers of the GF_GROUP when consecutive encode of frames in +// the same layer depth is enbaled. +static AOM_INLINE void set_multi_layer_params_for_gf14( + const TWO_PASS *twopass, const TWO_PASS_FRAME *twopass_frame, + const PRIMARY_RATE_CONTROL *p_rc, FRAME_INFO *frame_info, + GF_GROUP *const gf_group, FRAME_REORDER_INFO *arf_frame_stats, + int *cur_frame_idx, int *frame_ind, int *count_arf_frames, + int *doh_gf_index_map, int *parallel_frame_count, int *first_frame_index, + int *cur_disp_index, int gf_interval, int layer_depth, + int max_parallel_frames) { + assert(layer_depth == 2); + assert(gf_group->max_layer_depth_allowed >= 4); + int layer, node_start, node_end = 0; + // Maximum layer depth excluding LF_UPDATE frames is 4 since applicable only + // for gf-interval 14. + const int max_layer_depth = 4; + // Iterate through each layer depth starting from 2 till 'max_layer_depth'. + for (layer = layer_depth; layer <= max_layer_depth; layer++) { + // 'node_start' and 'node_end' indicate the number of nodes from the + // previous layer depth to be considered. It also corresponds to the indices + // of arf_frame_stats. + node_start = node_end; + node_end = (*count_arf_frames); + // 'num_dir' indicates the number of directions to traverse w.r.t. a given + // node in order to choose an INTNL_ARF_UPDATE frame. Layer depth 2 would + // have only one frame and hence needs to traverse only in the left + // direction w.r.t the node in the previous layer. + int num_dir = layer == 2 ? 1 : 2; + set_params_for_cur_layer_frames(gf_group, arf_frame_stats, cur_frame_idx, + cur_disp_index, frame_ind, count_arf_frames, + doh_gf_index_map, num_dir, node_start, + node_end, layer); + } + + for (int i = 1; i < gf_interval; i++) { + // Since doh_gf_index_map is already populated for all INTNL_ARF_UPDATE + // frames in the GF_GROUP, any frame with INVALID_IDX would correspond to an + // LF_UPDATE frame. + if (doh_gf_index_map[i] == INVALID_IDX) { + // LF_UPDATE frames. + // TODO(Remya): Correct start and end parameters passed to + // set_params_for_leaf_frames() once encode reordering for gf-interval 14 + // is enbaled for parallel encode of lower layer frames. + set_params_for_leaf_frames( + twopass, twopass_frame, p_rc, frame_info, gf_group, cur_frame_idx, + frame_ind, parallel_frame_count, max_parallel_frames, 1, + first_frame_index, cur_disp_index, layer, 0, 0); + } else { + // In order to obtain the layer depths of INTNL_OVERLAY_UPDATE frames, get + // the gf index of corresponding INTNL_ARF_UPDATE frames. + int intnl_arf_index = doh_gf_index_map[i]; + int ld = gf_group->layer_depth[intnl_arf_index]; + set_params_for_intnl_overlay_frames(gf_group, cur_frame_idx, frame_ind, + first_frame_index, cur_disp_index, + ld); + } + } +} + +// Set parameters for frames between 'start' and 'end' (excluding both). +static void set_multi_layer_params( + const TWO_PASS *twopass, const TWO_PASS_FRAME *twopass_frame, + GF_GROUP *const gf_group, const PRIMARY_RATE_CONTROL *p_rc, + RATE_CONTROL *rc, FRAME_INFO *frame_info, int start, int end, + int *cur_frame_idx, int *frame_ind, int *parallel_frame_count, + int max_parallel_frames, int do_frame_parallel_encode, + int *first_frame_index, int *cur_disp_idx, int layer_depth) { + const int num_frames_to_process = end - start; + + // 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->display_idx[*frame_ind] = *cur_disp_idx; + gf_group->layer_depth[*frame_ind] = MAX_ARF_LAYERS; + gf_group->arf_boost[*frame_ind] = + av1_calc_arf_boost(twopass, twopass_frame, p_rc, frame_info, start, + end - start, 0, NULL, NULL, 0); + gf_group->frame_type[*frame_ind] = INTER_FRAME; + gf_group->refbuf_state[*frame_ind] = REFBUF_UPDATE; + gf_group->max_layer_depth = + AOMMAX(gf_group->max_layer_depth, layer_depth); + // Set the level of parallelism for the LF_UPDATE frame. + if (do_frame_parallel_encode) { + set_frame_parallel_level(&gf_group->frame_parallel_level[*frame_ind], + parallel_frame_count, max_parallel_frames); + // Set LF_UPDATE frames as non-reference frames. + gf_group->is_frame_non_ref[*frame_ind] = true; + } + set_src_offset(gf_group, first_frame_index, *cur_frame_idx, *frame_ind); + ++(*frame_ind); + ++(*cur_frame_idx); + ++(*cur_disp_idx); + ++start; + } + } else { + const int m = (start + end - 1) / 2; + + // Internal ARF. + gf_group->update_type[*frame_ind] = INTNL_ARF_UPDATE; + gf_group->arf_src_offset[*frame_ind] = m - start; + gf_group->cur_frame_idx[*frame_ind] = *cur_frame_idx; + gf_group->display_idx[*frame_ind] = + *cur_disp_idx + gf_group->arf_src_offset[*frame_ind]; + gf_group->layer_depth[*frame_ind] = layer_depth; + gf_group->frame_type[*frame_ind] = INTER_FRAME; + gf_group->refbuf_state[*frame_ind] = REFBUF_UPDATE; + + if (do_frame_parallel_encode) { + // If max_parallel_frames is not exceeded and if the frame will not be + // temporally filtered, encode the next internal ARF frame in parallel. + if (*parallel_frame_count > 1 && + *parallel_frame_count <= max_parallel_frames) { + if (gf_group->arf_src_offset[*frame_ind] < TF_LOOKAHEAD_IDX_THR) + gf_group->frame_parallel_level[*frame_ind] = 2; + *parallel_frame_count = 1; + } + } + set_src_offset(gf_group, first_frame_index, *cur_frame_idx, *frame_ind); + + // Get the boost factor for intermediate ARF frames. + gf_group->arf_boost[*frame_ind] = + av1_calc_arf_boost(twopass, twopass_frame, p_rc, frame_info, m, end - m, + m - start, NULL, NULL, 0); + ++(*frame_ind); + + // Frames displayed before this internal ARF. + set_multi_layer_params(twopass, twopass_frame, gf_group, p_rc, rc, + frame_info, start, m, cur_frame_idx, frame_ind, + parallel_frame_count, max_parallel_frames, + do_frame_parallel_encode, first_frame_index, + cur_disp_idx, 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->display_idx[*frame_ind] = *cur_disp_idx; + gf_group->arf_boost[*frame_ind] = 0; + gf_group->layer_depth[*frame_ind] = layer_depth; + gf_group->frame_type[*frame_ind] = INTER_FRAME; + gf_group->refbuf_state[*frame_ind] = REFBUF_UPDATE; + + set_src_offset(gf_group, first_frame_index, *cur_frame_idx, *frame_ind); + ++(*frame_ind); + ++(*cur_frame_idx); + ++(*cur_disp_idx); + + // Frames displayed after this internal ARF. + set_multi_layer_params(twopass, twopass_frame, gf_group, p_rc, rc, + frame_info, m + 1, end, cur_frame_idx, frame_ind, + parallel_frame_count, max_parallel_frames, + do_frame_parallel_encode, first_frame_index, + cur_disp_idx, 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 baseline_gf_interval, + FRAME_UPDATE_TYPE first_frame_update_type) { + PRIMARY_RATE_CONTROL *const p_rc = &cpi->ppi->p_rc; + // TODO(angiebird): Why do we need "-1" here? + const int gf_interval = baseline_gf_interval - 1; + int frame_index = 0; + int cur_frame_index = 0; + + // Set the display order hint for the first frame in the GF_GROUP. + int cur_disp_index = (first_frame_update_type == KF_UPDATE) + ? 0 + : cpi->common.current_frame.frame_number; + + // Initialize gf_group->frame_parallel_level, gf_group->is_frame_non_ref, + // gf_group->src_offset and gf_group->is_frame_dropped with 0. + memset(gf_group->frame_parallel_level, 0, + sizeof(gf_group->frame_parallel_level)); + memset(gf_group->is_frame_non_ref, 0, sizeof(gf_group->is_frame_non_ref)); + memset(gf_group->src_offset, 0, sizeof(gf_group->src_offset)); + memset(gf_group->is_frame_dropped, 0, sizeof(gf_group->is_frame_dropped)); + // Initialize gf_group->skip_frame_refresh and gf_group->skip_frame_as_ref + // with INVALID_IDX. + memset(gf_group->skip_frame_refresh, INVALID_IDX, + sizeof(gf_group->skip_frame_refresh)); + memset(gf_group->skip_frame_as_ref, INVALID_IDX, + sizeof(gf_group->skip_frame_as_ref)); + + int kf_decomp = cpi->oxcf.kf_cfg.enable_keyframe_filtering > 1; + // This is a patch that fixes https://crbug.com/aomedia/3163 + // enable_keyframe_filtering > 1 will introduce an extra overlay frame at + // key frame location. However when + // baseline_gf_interval == MAX_STATIC_GF_GROUP_LENGTH, we can't + // afford to have an extra overlay frame. Otherwise, the gf_group->size will + // become MAX_STATIC_GF_GROUP_LENGTH + 1, which causes memory error. + // A cheap solution is to turn of kf_decomp here. + // TODO(angiebird): Find a systematic way to solve this issue. + if (baseline_gf_interval == MAX_STATIC_GF_GROUP_LENGTH) { + kf_decomp = 0; + } + if (first_frame_update_type == KF_UPDATE) { + gf_group->update_type[frame_index] = kf_decomp ? ARF_UPDATE : KF_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->frame_type[frame_index] = KEY_FRAME; + gf_group->refbuf_state[frame_index] = REFBUF_RESET; + gf_group->max_layer_depth = 0; + gf_group->display_idx[frame_index] = cur_disp_index; + if (!kf_decomp) cur_disp_index++; + ++frame_index; + + if (kf_decomp) { + gf_group->update_type[frame_index] = 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->frame_type[frame_index] = INTER_FRAME; + gf_group->refbuf_state[frame_index] = REFBUF_UPDATE; + gf_group->max_layer_depth = 0; + gf_group->display_idx[frame_index] = cur_disp_index; + cur_disp_index++; + ++frame_index; + } + cur_frame_index++; + } + + if (first_frame_update_type == GF_UPDATE) { + gf_group->update_type[frame_index] = GF_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->frame_type[frame_index] = INTER_FRAME; + gf_group->refbuf_state[frame_index] = REFBUF_UPDATE; + gf_group->max_layer_depth = 0; + gf_group->display_idx[frame_index] = cur_disp_index; + cur_disp_index++; + ++frame_index; + ++cur_frame_index; + } + + // ALTREF. + const int use_altref = gf_group->max_layer_depth_allowed > 0; + int is_fwd_kf = rc->frames_to_fwd_kf == gf_interval; + + if (use_altref) { + gf_group->update_type[frame_index] = ARF_UPDATE; + gf_group->arf_src_offset[frame_index] = gf_interval - cur_frame_index; + gf_group->cur_frame_idx[frame_index] = cur_frame_index; + gf_group->layer_depth[frame_index] = 1; + gf_group->arf_boost[frame_index] = cpi->ppi->p_rc.gfu_boost; + gf_group->frame_type[frame_index] = is_fwd_kf ? KEY_FRAME : INTER_FRAME; + gf_group->refbuf_state[frame_index] = REFBUF_UPDATE; + gf_group->max_layer_depth = 1; + gf_group->arf_index = frame_index; + gf_group->display_idx[frame_index] = + cur_disp_index + gf_group->arf_src_offset[frame_index]; + ++frame_index; + } else { + gf_group->arf_index = -1; + } + + // Flag to indicate if multi-layer configuration is complete. + int is_multi_layer_configured = 0; + + // Running count of no. of frames that is part of a given parallel + // encode set in a gf_group. Value of 1 indicates no parallel encode. + int parallel_frame_count = 1; + // Enable parallel encode of frames if gf_group has a multi-layer pyramid + // structure with minimum 4 layers. + int do_frame_parallel_encode = (cpi->ppi->num_fp_contexts > 1 && use_altref && + gf_group->max_layer_depth_allowed >= 4); + + int first_frame_index = cur_frame_index; + if (do_frame_parallel_encode) { + // construct_multi_layer_gf_structure() takes the input parameter + // 'gf_interval' as p_rc->baseline_gf_interval - 1 . Below code computes the + // actual GF_GROUP length by compensating for this offset. + int actual_gf_length = ((first_frame_update_type == KF_UPDATE) || + (first_frame_update_type == GF_UPDATE)) + ? gf_interval + : gf_interval + 1; + + // In order to facilitate parallel encoding of frames in lower layer depths, + // encode reordering is done. Currently encode reordering is enabled only + // for gf-intervals 16 and 32. NOTE: Since the buffer holding the + // reference frames is of size 8 (ref_frame_map[REF_FRAMES]), there is a + // limitation on the number of hidden frames possible at any given point and + // hence the reordering is enabled only for gf-intervals 16 and 32. + // Disabling encode reordering for gf-interval 14 since some cross-frame + // dependencies related to temporal filtering for FPMT is currently not + // handled. + int disable_gf14_reorder = 1; + if (actual_gf_length == 14 && !disable_gf14_reorder) { + // This array holds the gf index of INTNL_ARF_UPDATE frames in the slot + // corresponding to their display order hint. This is used while + // configuring the LF_UPDATE frames and INTNL_OVERLAY_UPDATE frames. + int doh_gf_index_map[FIXED_GF_INTERVAL]; + // Initialize doh_gf_index_map with INVALID_IDX. + memset(&doh_gf_index_map[0], INVALID_IDX, + (sizeof(doh_gf_index_map[0]) * FIXED_GF_INTERVAL)); + + FRAME_REORDER_INFO arf_frame_stats[REF_FRAMES - 1]; + // Store the stats corresponding to layer 1 frame. + fill_arf_frame_stats(arf_frame_stats, 0, actual_gf_length, 1, + actual_gf_length); + int count_arf_frames = 1; + + // Sets multi-layer params for gf-interval 14 to consecutively encode + // frames in the same layer depth, i.e., encode order would be 0-> 14-> + // 7-> 3-> 10-> 5-> 12-> 1-> 2-> 4-> 6-> 8-> 9-> 11-> 13. + // TODO(Remya): Set GF_GROUP param 'arf_boost' for all frames. + set_multi_layer_params_for_gf14( + twopass, &cpi->twopass_frame, p_rc, frame_info, gf_group, + arf_frame_stats, &cur_frame_index, &frame_index, &count_arf_frames, + doh_gf_index_map, ¶llel_frame_count, &first_frame_index, + &cur_disp_index, actual_gf_length, use_altref + 1, + cpi->ppi->num_fp_contexts); + + // Set gf_group->skip_frame_refresh. + for (int i = 0; i < actual_gf_length; i++) { + int count = 0; + if (gf_group->update_type[i] == INTNL_ARF_UPDATE) { + for (int j = 0; j < i; j++) { + // Store the display order hint of the frames which would not + // have been displayed at the encode call of frame 'i'. + if ((gf_group->display_idx[j] < gf_group->display_idx[i]) && + gf_group->update_type[j] == INTNL_ARF_UPDATE) { + gf_group->skip_frame_refresh[i][count++] = + gf_group->display_idx[j]; + } + } + } + } + } else { + // Set layer depth threshold for reordering as per the gf length. + int depth_thr = (actual_gf_length == 16) ? 3 + : (actual_gf_length == 32) ? 4 + : INT_MAX; + + set_multi_layer_params_for_fp( + twopass, &cpi->twopass_frame, gf_group, p_rc, rc, frame_info, + cur_frame_index, gf_interval, &cur_frame_index, &frame_index, + ¶llel_frame_count, cpi->ppi->num_fp_contexts, + do_frame_parallel_encode, &first_frame_index, depth_thr, + &cur_disp_index, use_altref + 1); + } + is_multi_layer_configured = 1; + } + + // Rest of the frames. + if (!is_multi_layer_configured) + set_multi_layer_params(twopass, &cpi->twopass_frame, gf_group, p_rc, rc, + frame_info, cur_frame_index, gf_interval, + &cur_frame_index, &frame_index, + ¶llel_frame_count, cpi->ppi->num_fp_contexts, + do_frame_parallel_encode, &first_frame_index, + &cur_disp_index, use_altref + 1); + + if (use_altref) { + gf_group->update_type[frame_index] = 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] = MAX_ARF_LAYERS; + gf_group->arf_boost[frame_index] = NORMAL_BOOST; + gf_group->frame_type[frame_index] = INTER_FRAME; + gf_group->refbuf_state[frame_index] = + is_fwd_kf ? REFBUF_RESET : REFBUF_UPDATE; + gf_group->display_idx[frame_index] = cur_disp_index; + ++frame_index; + } else { + for (; cur_frame_index <= gf_interval; ++cur_frame_index) { + gf_group->update_type[frame_index] = LF_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] = MAX_ARF_LAYERS; + gf_group->arf_boost[frame_index] = NORMAL_BOOST; + gf_group->frame_type[frame_index] = INTER_FRAME; + gf_group->refbuf_state[frame_index] = REFBUF_UPDATE; + gf_group->max_layer_depth = AOMMAX(gf_group->max_layer_depth, 2); + set_src_offset(gf_group, &first_frame_index, cur_frame_index, + frame_index); + gf_group->display_idx[frame_index] = cur_disp_index; + cur_disp_index++; + ++frame_index; + } + } + if (do_frame_parallel_encode) { + // Iterate through the gf_group and reset frame_parallel_level to 0 in case + // a frame is marked as frame_parallel_level 1 with no subsequent + // frame_parallel_level 2 frame(s). + int level1_frame_idx = INT_MAX; + int level2_frame_count = 0; + for (int frame_idx = 0; frame_idx < frame_index; frame_idx++) { + if (gf_group->frame_parallel_level[frame_idx] == 1) { + // Set frame_parallel_level to 0 if only one frame is present in a + // parallel encode set. + if (level1_frame_idx != INT_MAX && !level2_frame_count) + gf_group->frame_parallel_level[level1_frame_idx] = 0; + // Book-keep frame_idx of frame_parallel_level 1 frame and reset the + // count of frame_parallel_level 2 frames in the corresponding parallel + // encode set. + level1_frame_idx = frame_idx; + level2_frame_count = 0; + } + if (gf_group->frame_parallel_level[frame_idx] == 2) level2_frame_count++; + } + // If frame_parallel_level is set to 1 for the last LF_UPDATE + // frame in the gf_group, reset it to zero since there are no subsequent + // frames in the gf_group. + if (gf_group->frame_parallel_level[frame_index - 2] == 1) { + assert(gf_group->update_type[frame_index - 2] == LF_UPDATE); + gf_group->frame_parallel_level[frame_index - 2] = 0; + } + } + + for (int gf_idx = frame_index; gf_idx < MAX_STATIC_GF_GROUP_LENGTH; + ++gf_idx) { + gf_group->update_type[gf_idx] = LF_UPDATE; + gf_group->arf_src_offset[gf_idx] = 0; + gf_group->cur_frame_idx[gf_idx] = gf_idx; + gf_group->layer_depth[gf_idx] = MAX_ARF_LAYERS; + gf_group->arf_boost[gf_idx] = NORMAL_BOOST; + gf_group->frame_type[gf_idx] = INTER_FRAME; + gf_group->refbuf_state[gf_idx] = REFBUF_UPDATE; + gf_group->max_layer_depth = AOMMAX(gf_group->max_layer_depth, 2); + } + + return frame_index; +} + +static void set_ld_layer_depth(GF_GROUP *gf_group, int gop_length) { + int log_gop_length = 0; + while ((1 << log_gop_length) < gop_length) { + ++log_gop_length; + } + + for (int gf_index = 0; gf_index < gf_group->size; ++gf_index) { + int count = 0; + // Find the trailing zeros + for (; count < MAX_ARF_LAYERS; ++count) { + if ((gf_index >> count) & 0x01) break; + } + gf_group->layer_depth[gf_index] = AOMMAX(log_gop_length - count, 0); + } + gf_group->max_layer_depth = AOMMIN(log_gop_length, MAX_ARF_LAYERS); +} + +void av1_gop_setup_structure(AV1_COMP *cpi) { + RATE_CONTROL *const rc = &cpi->rc; + PRIMARY_RATE_CONTROL *const p_rc = &cpi->ppi->p_rc; + GF_GROUP *const gf_group = &cpi->ppi->gf_group; + TWO_PASS *const twopass = &cpi->ppi->twopass; + FRAME_INFO *const frame_info = &cpi->frame_info; + const int key_frame = rc->frames_since_key == 0; + FRAME_UPDATE_TYPE first_frame_update_type = ARF_UPDATE; + + if (key_frame) { + first_frame_update_type = KF_UPDATE; + if (cpi->oxcf.kf_max_pyr_height != -1) { + gf_group->max_layer_depth_allowed = AOMMIN( + cpi->oxcf.kf_max_pyr_height, gf_group->max_layer_depth_allowed); + } + } else if (!cpi->ppi->gf_state.arf_gf_boost_lst) { + first_frame_update_type = GF_UPDATE; + } + + gf_group->size = construct_multi_layer_gf_structure( + cpi, twopass, gf_group, rc, frame_info, p_rc->baseline_gf_interval, + first_frame_update_type); + + if (gf_group->max_layer_depth_allowed == 0) + set_ld_layer_depth(gf_group, p_rc->baseline_gf_interval); +} + +int av1_gop_check_forward_keyframe(const GF_GROUP *gf_group, + int gf_frame_index) { + return gf_group->frame_type[gf_frame_index] == KEY_FRAME && + gf_group->refbuf_state[gf_frame_index] == REFBUF_UPDATE; +} + +int av1_gop_is_second_arf(const GF_GROUP *gf_group, int gf_frame_index) { + const int arf_src_offset = gf_group->arf_src_offset[gf_frame_index]; + // TODO(angiebird): when gf_group->size == 32, it's possble to + // have "two" second arf. Check if this is acceptable. + if (gf_group->update_type[gf_frame_index] == INTNL_ARF_UPDATE && + arf_src_offset >= TF_LOOKAHEAD_IDX_THR) { + return 1; + } + return 0; +} |