| /* |
| * 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 <assert.h> |
| #include <math.h> |
| |
| #include "av1/encoder/encoder.h" |
| #include "av1/encoder/encoder_alloc.h" |
| |
| static void swap_ptr(void *a, void *b) { |
| void **a_p = (void **)a; |
| void **b_p = (void **)b; |
| void *c = *a_p; |
| *a_p = *b_p; |
| *b_p = c; |
| } |
| |
| void av1_init_layer_context(AV1_COMP *const cpi) { |
| AV1_COMMON *const cm = &cpi->common; |
| const AV1EncoderConfig *const oxcf = &cpi->oxcf; |
| SVC *const svc = &cpi->svc; |
| int mi_rows = cpi->common.mi_params.mi_rows; |
| int mi_cols = cpi->common.mi_params.mi_cols; |
| svc->base_framerate = 30.0; |
| svc->current_superframe = 0; |
| svc->force_zero_mode_spatial_ref = 1; |
| svc->num_encoded_top_layer = 0; |
| svc->use_flexible_mode = 0; |
| svc->has_lower_quality_layer = 0; |
| |
| for (int sl = 0; sl < svc->number_spatial_layers; ++sl) { |
| for (int tl = 0; tl < svc->number_temporal_layers; ++tl) { |
| int layer = LAYER_IDS_TO_IDX(sl, tl, svc->number_temporal_layers); |
| LAYER_CONTEXT *const lc = &svc->layer_context[layer]; |
| RATE_CONTROL *const lrc = &lc->rc; |
| PRIMARY_RATE_CONTROL *const lp_rc = &lc->p_rc; |
| lrc->ni_av_qi = oxcf->rc_cfg.worst_allowed_q; |
| lp_rc->total_actual_bits = 0; |
| lrc->ni_tot_qi = 0; |
| lp_rc->tot_q = 0.0; |
| lp_rc->avg_q = 0.0; |
| lp_rc->ni_frames = 0; |
| lrc->decimation_count = 0; |
| lrc->decimation_factor = 0; |
| lrc->worst_quality = av1_quantizer_to_qindex(lc->max_q); |
| lrc->best_quality = av1_quantizer_to_qindex(lc->min_q); |
| lrc->rtc_external_ratectrl = 0; |
| for (int i = 0; i < RATE_FACTOR_LEVELS; ++i) { |
| lp_rc->rate_correction_factors[i] = 1.0; |
| } |
| lc->target_bandwidth = lc->layer_target_bitrate; |
| lp_rc->last_q[INTER_FRAME] = lrc->worst_quality; |
| lp_rc->avg_frame_qindex[INTER_FRAME] = lrc->worst_quality; |
| lp_rc->avg_frame_qindex[KEY_FRAME] = lrc->worst_quality; |
| lp_rc->buffer_level = |
| oxcf->rc_cfg.starting_buffer_level_ms * lc->target_bandwidth / 1000; |
| lp_rc->bits_off_target = lp_rc->buffer_level; |
| // Initialize the cyclic refresh parameters. If spatial layers are used |
| // (i.e., ss_number_layers > 1), these need to be updated per spatial |
| // layer. Cyclic refresh is only applied on base temporal layer. |
| if (svc->number_spatial_layers > 1 && tl == 0) { |
| lc->sb_index = 0; |
| lc->actual_num_seg1_blocks = 0; |
| lc->actual_num_seg2_blocks = 0; |
| lc->counter_encode_maxq_scene_change = 0; |
| aom_free(lc->map); |
| CHECK_MEM_ERROR(cm, lc->map, |
| aom_calloc(mi_rows * mi_cols, sizeof(*lc->map))); |
| } |
| } |
| svc->downsample_filter_type[sl] = BILINEAR; |
| svc->downsample_filter_phase[sl] = 8; |
| svc->last_layer_dropped[sl] = false; |
| svc->drop_spatial_layer[sl] = false; |
| } |
| if (svc->number_spatial_layers == 3) { |
| svc->downsample_filter_type[0] = EIGHTTAP_SMOOTH; |
| } |
| } |
| |
| bool av1_alloc_layer_context(AV1_COMP *cpi, int num_layers) { |
| SVC *const svc = &cpi->svc; |
| if (svc->layer_context == NULL || svc->num_allocated_layers < num_layers) { |
| assert(num_layers > 1); |
| aom_free(svc->layer_context); |
| svc->num_allocated_layers = 0; |
| svc->layer_context = |
| (LAYER_CONTEXT *)aom_calloc(num_layers, sizeof(*svc->layer_context)); |
| if (svc->layer_context == NULL) return false; |
| svc->num_allocated_layers = num_layers; |
| } |
| return true; |
| } |
| |
| // Update the layer context from a change_config() call. |
| void av1_update_layer_context_change_config(AV1_COMP *const cpi, |
| const int64_t target_bandwidth) { |
| const RATE_CONTROL *const rc = &cpi->rc; |
| const PRIMARY_RATE_CONTROL *const p_rc = &cpi->ppi->p_rc; |
| AV1_COMMON *const cm = &cpi->common; |
| SVC *const svc = &cpi->svc; |
| int layer = 0; |
| int64_t spatial_layer_target = 0; |
| float bitrate_alloc = 1.0; |
| const int mi_rows = cm->mi_params.mi_rows; |
| const int mi_cols = cm->mi_params.mi_cols; |
| for (int sl = 0; sl < svc->number_spatial_layers; ++sl) { |
| for (int tl = 0; tl < svc->number_temporal_layers; ++tl) { |
| layer = LAYER_IDS_TO_IDX(sl, tl, svc->number_temporal_layers); |
| LAYER_CONTEXT *const lc = &svc->layer_context[layer]; |
| svc->layer_context[layer].target_bandwidth = lc->layer_target_bitrate; |
| } |
| spatial_layer_target = svc->layer_context[layer].target_bandwidth; |
| for (int tl = 0; tl < svc->number_temporal_layers; ++tl) { |
| LAYER_CONTEXT *const lc = |
| &svc->layer_context[sl * svc->number_temporal_layers + tl]; |
| RATE_CONTROL *const lrc = &lc->rc; |
| PRIMARY_RATE_CONTROL *const lp_rc = &lc->p_rc; |
| lc->spatial_layer_target_bandwidth = spatial_layer_target; |
| if (target_bandwidth != 0) { |
| bitrate_alloc = (float)lc->target_bandwidth / target_bandwidth; |
| } |
| lp_rc->starting_buffer_level = |
| (int64_t)(p_rc->starting_buffer_level * bitrate_alloc); |
| lp_rc->optimal_buffer_level = |
| (int64_t)(p_rc->optimal_buffer_level * bitrate_alloc); |
| lp_rc->maximum_buffer_size = |
| (int64_t)(p_rc->maximum_buffer_size * bitrate_alloc); |
| lp_rc->bits_off_target = |
| AOMMIN(lp_rc->bits_off_target, lp_rc->maximum_buffer_size); |
| lp_rc->buffer_level = |
| AOMMIN(lp_rc->buffer_level, lp_rc->maximum_buffer_size); |
| lc->framerate = cpi->framerate / lc->framerate_factor; |
| lrc->avg_frame_bandwidth = |
| (int)round(lc->target_bandwidth / lc->framerate); |
| lrc->max_frame_bandwidth = rc->max_frame_bandwidth; |
| lrc->rtc_external_ratectrl = rc->rtc_external_ratectrl; |
| lrc->worst_quality = av1_quantizer_to_qindex(lc->max_q); |
| lrc->best_quality = av1_quantizer_to_qindex(lc->min_q); |
| if (rc->use_external_qp_one_pass) { |
| lrc->worst_quality = rc->worst_quality; |
| lrc->best_quality = rc->best_quality; |
| } |
| // Reset the cyclic refresh parameters, if needed (map is NULL), |
| // or number of spatial layers has changed. |
| // Cyclic refresh is only applied on base temporal layer. |
| if (svc->number_spatial_layers > 1 && tl == 0 && |
| (lc->map == NULL || |
| svc->prev_number_spatial_layers != svc->number_spatial_layers)) { |
| lc->sb_index = 0; |
| lc->actual_num_seg1_blocks = 0; |
| lc->actual_num_seg2_blocks = 0; |
| lc->counter_encode_maxq_scene_change = 0; |
| aom_free(lc->map); |
| CHECK_MEM_ERROR(cm, lc->map, |
| aom_calloc(mi_rows * mi_cols, sizeof(*lc->map))); |
| } |
| } |
| } |
| } |
| |
| /*!\brief Return layer context for current layer. |
| * |
| * \ingroup rate_control |
| * \param[in] cpi Top level encoder structure |
| * |
| * \return LAYER_CONTEXT for current layer. |
| */ |
| static LAYER_CONTEXT *get_layer_context(AV1_COMP *const cpi) { |
| return &cpi->svc.layer_context[cpi->svc.spatial_layer_id * |
| cpi->svc.number_temporal_layers + |
| cpi->svc.temporal_layer_id]; |
| } |
| |
| void av1_update_temporal_layer_framerate(AV1_COMP *const cpi) { |
| SVC *const svc = &cpi->svc; |
| LAYER_CONTEXT *const lc = get_layer_context(cpi); |
| RATE_CONTROL *const lrc = &lc->rc; |
| const int tl = svc->temporal_layer_id; |
| lc->framerate = cpi->framerate / lc->framerate_factor; |
| lrc->avg_frame_bandwidth = |
| saturate_cast_double_to_int(round(lc->target_bandwidth / lc->framerate)); |
| lrc->max_frame_bandwidth = cpi->rc.max_frame_bandwidth; |
| // Update the average layer frame size (non-cumulative per-frame-bw). |
| if (tl == 0) { |
| lc->avg_frame_size = lrc->avg_frame_bandwidth; |
| } else { |
| int prev_layer = svc->spatial_layer_id * svc->number_temporal_layers + |
| svc->temporal_layer_id - 1; |
| LAYER_CONTEXT *const lcprev = &svc->layer_context[prev_layer]; |
| const double prev_layer_framerate = |
| cpi->framerate / lcprev->framerate_factor; |
| const int64_t prev_layer_target_bandwidth = lcprev->layer_target_bitrate; |
| if (lc->framerate > prev_layer_framerate) { |
| lc->avg_frame_size = |
| (int)round((lc->target_bandwidth - prev_layer_target_bandwidth) / |
| (lc->framerate - prev_layer_framerate)); |
| } else { |
| lc->avg_frame_size = (int)round(lc->target_bandwidth / lc->framerate); |
| } |
| } |
| } |
| |
| bool av1_check_ref_is_low_spatial_res_super_frame(AV1_COMP *const cpi, |
| int ref_frame) { |
| SVC *svc = &cpi->svc; |
| RTC_REF *const rtc_ref = &cpi->ppi->rtc_ref; |
| int ref_frame_idx = rtc_ref->ref_idx[ref_frame - 1]; |
| return rtc_ref->buffer_time_index[ref_frame_idx] == svc->current_superframe && |
| rtc_ref->buffer_spatial_layer[ref_frame_idx] <= |
| svc->spatial_layer_id - 1; |
| } |
| |
| void av1_restore_layer_context(AV1_COMP *const cpi) { |
| SVC *const svc = &cpi->svc; |
| RTC_REF *const rtc_ref = &cpi->ppi->rtc_ref; |
| const AV1_COMMON *const cm = &cpi->common; |
| LAYER_CONTEXT *const lc = get_layer_context(cpi); |
| const int old_frame_since_key = cpi->rc.frames_since_key; |
| const int old_frame_to_key = cpi->rc.frames_to_key; |
| const int frames_since_scene_change = cpi->rc.frames_since_scene_change; |
| const int last_encoded_size_keyframe = cpi->rc.last_encoded_size_keyframe; |
| const int last_target_size_keyframe = cpi->rc.last_target_size_keyframe; |
| const int max_consec_drop = cpi->rc.max_consec_drop; |
| const int postencode_drop = cpi->rc.postencode_drop; |
| const int static_since_last_scene_change = |
| cpi->rc.static_since_last_scene_change; |
| // Restore layer rate control. |
| cpi->rc = lc->rc; |
| cpi->ppi->p_rc = lc->p_rc; |
| cpi->oxcf.rc_cfg.target_bandwidth = lc->target_bandwidth; |
| cpi->gf_frame_index = 0; |
| cpi->mv_search_params.max_mv_magnitude = lc->max_mv_magnitude; |
| if (cpi->mv_search_params.max_mv_magnitude == 0) |
| cpi->mv_search_params.max_mv_magnitude = AOMMAX(cm->width, cm->height); |
| // Reset the following parameters to their values before |
| // the layer restore. Keep these defined for the stream (not layer). |
| cpi->rc.frames_since_key = old_frame_since_key; |
| cpi->rc.frames_to_key = old_frame_to_key; |
| cpi->rc.frames_since_scene_change = frames_since_scene_change; |
| cpi->rc.last_encoded_size_keyframe = last_encoded_size_keyframe; |
| cpi->rc.last_target_size_keyframe = last_target_size_keyframe; |
| cpi->rc.max_consec_drop = max_consec_drop; |
| cpi->rc.postencode_drop = postencode_drop; |
| cpi->rc.static_since_last_scene_change = static_since_last_scene_change; |
| // For spatial-svc, allow cyclic-refresh to be applied on the spatial layers, |
| // for the base temporal layer. |
| if (cpi->oxcf.q_cfg.aq_mode == CYCLIC_REFRESH_AQ && |
| svc->number_spatial_layers > 1 && svc->temporal_layer_id == 0) { |
| CYCLIC_REFRESH *const cr = cpi->cyclic_refresh; |
| swap_ptr(&cr->map, &lc->map); |
| cr->sb_index = lc->sb_index; |
| cr->actual_num_seg1_blocks = lc->actual_num_seg1_blocks; |
| cr->actual_num_seg2_blocks = lc->actual_num_seg2_blocks; |
| cr->counter_encode_maxq_scene_change = lc->counter_encode_maxq_scene_change; |
| } |
| svc->skip_mvsearch_last = 0; |
| svc->skip_mvsearch_gf = 0; |
| svc->skip_mvsearch_altref = 0; |
| // For each reference (LAST/GOLDEN) set the skip_mvsearch_last/gf frame flags. |
| // This is to skip searching mv for that reference if it was last |
| // refreshed (i.e., buffer slot holding that reference was refreshed) on the |
| // previous spatial layer(s) at the same time (current_superframe). |
| if (rtc_ref->set_ref_frame_config && svc->force_zero_mode_spatial_ref && |
| cpi->sf.rt_sf.use_nonrd_pick_mode) { |
| if (av1_check_ref_is_low_spatial_res_super_frame(cpi, LAST_FRAME)) { |
| svc->skip_mvsearch_last = 1; |
| } |
| if (av1_check_ref_is_low_spatial_res_super_frame(cpi, GOLDEN_FRAME)) { |
| svc->skip_mvsearch_gf = 1; |
| } |
| if (av1_check_ref_is_low_spatial_res_super_frame(cpi, ALTREF_FRAME)) { |
| svc->skip_mvsearch_altref = 1; |
| } |
| } |
| } |
| |
| void av1_svc_update_buffer_slot_refreshed(AV1_COMP *const cpi) { |
| SVC *const svc = &cpi->svc; |
| RTC_REF *const rtc_ref = &cpi->ppi->rtc_ref; |
| const unsigned int current_frame = |
| cpi->ppi->use_svc ? svc->current_superframe |
| : cpi->common.current_frame.frame_number; |
| // For any buffer slot that is refreshed, update it with |
| // the spatial_layer_id and the current_superframe. |
| if (cpi->common.current_frame.frame_type == KEY_FRAME) { |
| // All slots are refreshed on KEY. |
| for (unsigned int i = 0; i < REF_FRAMES; i++) { |
| rtc_ref->buffer_time_index[i] = current_frame; |
| rtc_ref->buffer_spatial_layer[i] = svc->spatial_layer_id; |
| } |
| } else if (rtc_ref->set_ref_frame_config) { |
| for (unsigned int i = 0; i < INTER_REFS_PER_FRAME; i++) { |
| const int ref_frame_map_idx = rtc_ref->ref_idx[i]; |
| if (rtc_ref->refresh[ref_frame_map_idx]) { |
| rtc_ref->buffer_time_index[ref_frame_map_idx] = current_frame; |
| rtc_ref->buffer_spatial_layer[ref_frame_map_idx] = |
| svc->spatial_layer_id; |
| } |
| } |
| } |
| } |
| |
| void av1_save_layer_context(AV1_COMP *const cpi) { |
| SVC *const svc = &cpi->svc; |
| const AV1_COMMON *const cm = &cpi->common; |
| LAYER_CONTEXT *lc = get_layer_context(cpi); |
| lc->rc = cpi->rc; |
| lc->p_rc = cpi->ppi->p_rc; |
| lc->target_bandwidth = (int)cpi->oxcf.rc_cfg.target_bandwidth; |
| lc->group_index = cpi->gf_frame_index; |
| lc->max_mv_magnitude = cpi->mv_search_params.max_mv_magnitude; |
| if (svc->spatial_layer_id == 0) svc->base_framerate = cpi->framerate; |
| // For spatial-svc, allow cyclic-refresh to be applied on the spatial layers, |
| // for the base temporal layer. |
| if (cpi->oxcf.q_cfg.aq_mode == CYCLIC_REFRESH_AQ && |
| cpi->svc.number_spatial_layers > 1 && svc->temporal_layer_id == 0) { |
| CYCLIC_REFRESH *const cr = cpi->cyclic_refresh; |
| signed char *temp = lc->map; |
| lc->map = cr->map; |
| cr->map = temp; |
| lc->sb_index = cr->sb_index; |
| lc->actual_num_seg1_blocks = cr->actual_num_seg1_blocks; |
| lc->actual_num_seg2_blocks = cr->actual_num_seg2_blocks; |
| lc->counter_encode_maxq_scene_change = cr->counter_encode_maxq_scene_change; |
| } |
| if (!cpi->is_dropped_frame) { |
| av1_svc_update_buffer_slot_refreshed(cpi); |
| for (unsigned int i = 0; i < REF_FRAMES; i++) { |
| if (frame_is_intra_only(cm) || |
| cm->current_frame.refresh_frame_flags & (1 << i)) { |
| svc->spatial_layer_fb[i] = svc->spatial_layer_id; |
| svc->temporal_layer_fb[i] = svc->temporal_layer_id; |
| } |
| } |
| } |
| if (svc->spatial_layer_id == svc->number_spatial_layers - 1) { |
| svc->current_superframe++; |
| // Reset drop flag to false for next superframe. |
| for (int sl = 0; sl < svc->number_spatial_layers; sl++) |
| svc->drop_spatial_layer[sl] = false; |
| } |
| } |
| |
| int av1_svc_primary_ref_frame(const AV1_COMP *const cpi) { |
| const SVC *const svc = &cpi->svc; |
| const AV1_COMMON *const cm = &cpi->common; |
| int fb_idx = -1; |
| int primary_ref_frame = PRIMARY_REF_NONE; |
| if (cpi->svc.number_spatial_layers > 1 || |
| cpi->svc.number_temporal_layers > 1) { |
| // Set the primary_ref_frame to LAST_FRAME if that buffer slot for LAST |
| // was last updated on a lower temporal layer (or base TL0) and for the |
| // same spatial layer. For RTC patterns this allows for continued decoding |
| // when set of enhancement layers are dropped (continued decoding starting |
| // at next base TL0), so error_resilience can be off/0 for all layers. |
| fb_idx = get_ref_frame_map_idx(cm, LAST_FRAME); |
| if (cpi->ppi->rtc_ref.reference[0] == 1 && |
| svc->spatial_layer_fb[fb_idx] == svc->spatial_layer_id && |
| (svc->temporal_layer_fb[fb_idx] < svc->temporal_layer_id || |
| svc->temporal_layer_fb[fb_idx] == 0)) { |
| primary_ref_frame = 0; // LAST_FRAME: ref_frame - LAST_FRAME |
| } |
| } else if (cpi->ppi->rtc_ref.set_ref_frame_config) { |
| const ExternalFlags *const ext_flags = &cpi->ext_flags; |
| int flags = ext_flags->ref_frame_flags; |
| if (flags & AOM_LAST_FLAG) { |
| primary_ref_frame = 0; // LAST_FRAME: ref_frame - LAST_FRAME |
| } else if (flags & AOM_GOLD_FLAG) { |
| primary_ref_frame = GOLDEN_FRAME - LAST_FRAME; |
| } else if (flags & AOM_ALT_FLAG) { |
| primary_ref_frame = ALTREF_FRAME - LAST_FRAME; |
| } |
| } |
| return primary_ref_frame; |
| } |
| |
| void av1_free_svc_cyclic_refresh(AV1_COMP *const cpi) { |
| SVC *const svc = &cpi->svc; |
| for (int sl = 0; sl < svc->number_spatial_layers; ++sl) { |
| for (int tl = 0; tl < svc->number_temporal_layers; ++tl) { |
| int layer = LAYER_IDS_TO_IDX(sl, tl, svc->number_temporal_layers); |
| LAYER_CONTEXT *const lc = &svc->layer_context[layer]; |
| aom_free(lc->map); |
| lc->map = NULL; |
| } |
| } |
| } |
| |
| void av1_svc_reset_temporal_layers(AV1_COMP *const cpi, int is_key) { |
| SVC *const svc = &cpi->svc; |
| LAYER_CONTEXT *lc = NULL; |
| for (int sl = 0; sl < svc->number_spatial_layers; ++sl) { |
| for (int tl = 0; tl < svc->number_temporal_layers; ++tl) { |
| lc = &cpi->svc.layer_context[sl * svc->number_temporal_layers + tl]; |
| if (is_key) lc->frames_from_key_frame = 0; |
| } |
| } |
| av1_update_temporal_layer_framerate(cpi); |
| av1_restore_layer_context(cpi); |
| } |
| |
| void av1_get_layer_resolution(const int width_org, const int height_org, |
| const int num, const int den, int *width_out, |
| int *height_out) { |
| int w, h; |
| if (width_out == NULL || height_out == NULL || den == 0) return; |
| if (den == 1 && num == 1) { |
| *width_out = width_org; |
| *height_out = height_org; |
| return; |
| } |
| w = width_org * num / den; |
| h = height_org * num / den; |
| // Make height and width even. |
| w += w % 2; |
| h += h % 2; |
| *width_out = w; |
| *height_out = h; |
| } |
| |
| void av1_one_pass_cbr_svc_start_layer(AV1_COMP *const cpi) { |
| SVC *const svc = &cpi->svc; |
| AV1_COMMON *const cm = &cpi->common; |
| LAYER_CONTEXT *lc = NULL; |
| int width = 0, height = 0; |
| lc = &svc->layer_context[svc->spatial_layer_id * svc->number_temporal_layers + |
| svc->temporal_layer_id]; |
| // Set the lower quality layer flag. |
| svc->has_lower_quality_layer = 0; |
| if (cpi->svc.spatial_layer_id > 0) { |
| const LAYER_CONTEXT *lc_prev = |
| &svc->layer_context[(svc->spatial_layer_id - 1) * |
| svc->number_temporal_layers + |
| svc->temporal_layer_id]; |
| if (lc_prev->scaling_factor_den == 1 && lc_prev->scaling_factor_num == 1) |
| svc->has_lower_quality_layer = 1; |
| } |
| av1_get_layer_resolution(cpi->oxcf.frm_dim_cfg.width, |
| cpi->oxcf.frm_dim_cfg.height, lc->scaling_factor_num, |
| lc->scaling_factor_den, &width, &height); |
| // Use Eightap_smooth for low resolutions. |
| if (width * height <= 320 * 240) |
| svc->downsample_filter_type[svc->spatial_layer_id] = EIGHTTAP_SMOOTH; |
| |
| cm->width = width; |
| cm->height = height; |
| alloc_mb_mode_info_buffers(cpi); |
| av1_update_frame_size(cpi); |
| if (svc->spatial_layer_id == svc->number_spatial_layers - 1) { |
| svc->mi_cols_full_resoln = cm->mi_params.mi_cols; |
| svc->mi_rows_full_resoln = cm->mi_params.mi_rows; |
| } |
| } |
| |
| enum { |
| SVC_LAST_FRAME = 0, |
| SVC_LAST2_FRAME, |
| SVC_LAST3_FRAME, |
| SVC_GOLDEN_FRAME, |
| SVC_BWDREF_FRAME, |
| SVC_ALTREF2_FRAME, |
| SVC_ALTREF_FRAME |
| }; |
| |
| // For fixed svc mode: fixed pattern is set based on the number of |
| // spatial and temporal layers, and the ksvc_fixed_mode. |
| void av1_set_svc_fixed_mode(AV1_COMP *const cpi) { |
| SVC *const svc = &cpi->svc; |
| RTC_REF *const rtc_ref = &cpi->ppi->rtc_ref; |
| int i; |
| assert(svc->use_flexible_mode == 0); |
| assert(svc->number_spatial_layers >= 1 && svc->number_temporal_layers >= 1); |
| // Fixed SVC mode only supports at most 3 spatial or temporal layers. |
| if (svc->number_spatial_layers > 3 || svc->number_temporal_layers > 3) { |
| aom_internal_error(&cpi->ppi->error, AOM_CODEC_INVALID_PARAM, |
| "Invalid number of spatial/temporal layers for fixed " |
| "SVC mode (max: 3)"); |
| } |
| rtc_ref->set_ref_frame_config = 1; |
| int superframe_cnt = svc->current_superframe; |
| // Set the reference map buffer idx for the 7 references: |
| // LAST_FRAME (0), LAST2_FRAME(1), LAST3_FRAME(2), GOLDEN_FRAME(3), |
| // BWDREF_FRAME(4), ALTREF2_FRAME(5), ALTREF_FRAME(6). |
| for (i = 0; i < INTER_REFS_PER_FRAME; i++) { |
| rtc_ref->reference[i] = 0; |
| rtc_ref->ref_idx[i] = i; |
| } |
| for (i = 0; i < REF_FRAMES; i++) rtc_ref->refresh[i] = 0; |
| // Always reference LAST, and reference GOLDEN on SL > 0. |
| // For KSVC: GOLDEN reference will be removed on INTER_FRAMES later |
| // when frame_type is set. |
| rtc_ref->reference[SVC_LAST_FRAME] = 1; |
| if (svc->spatial_layer_id > 0) rtc_ref->reference[SVC_GOLDEN_FRAME] = 1; |
| if (svc->temporal_layer_id == 0) { |
| // Base temporal layer. |
| if (svc->spatial_layer_id == 0) { |
| // Set all buffer_idx to 0. Update slot 0 (LAST). |
| for (i = 0; i < INTER_REFS_PER_FRAME; i++) rtc_ref->ref_idx[i] = 0; |
| rtc_ref->refresh[0] = 1; |
| } else if (svc->spatial_layer_id == 1) { |
| // Set buffer_idx for LAST to slot 1, GOLDEN (and all other refs) to |
| // slot 0. Update slot 1 (LAST). |
| for (i = 0; i < INTER_REFS_PER_FRAME; i++) rtc_ref->ref_idx[i] = 0; |
| rtc_ref->ref_idx[SVC_LAST_FRAME] = 1; |
| rtc_ref->refresh[1] = 1; |
| } else if (svc->spatial_layer_id == 2) { |
| // Set buffer_idx for LAST to slot 2, GOLDEN (and all other refs) to |
| // slot 1. Update slot 2 (LAST). |
| for (i = 0; i < INTER_REFS_PER_FRAME; i++) rtc_ref->ref_idx[i] = 1; |
| rtc_ref->ref_idx[SVC_LAST_FRAME] = 2; |
| rtc_ref->refresh[2] = 1; |
| } |
| } else if (svc->temporal_layer_id == 2 && (superframe_cnt - 1) % 4 == 0) { |
| // First top temporal enhancement layer. |
| if (svc->spatial_layer_id == 0) { |
| // Reference LAST (slot 0). |
| // Set GOLDEN to slot 3 and update slot 3. |
| // Set all other buffer_idx to slot 0. |
| for (i = 0; i < INTER_REFS_PER_FRAME; i++) rtc_ref->ref_idx[i] = 0; |
| if (svc->spatial_layer_id < svc->number_spatial_layers - 1) { |
| rtc_ref->ref_idx[SVC_GOLDEN_FRAME] = 3; |
| rtc_ref->refresh[3] = 1; |
| } |
| } else if (svc->spatial_layer_id == 1) { |
| // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 1, |
| // GOLDEN (and all other refs) to slot 3. |
| // Set LAST2 to slot 4 and Update slot 4. |
| for (i = 0; i < INTER_REFS_PER_FRAME; i++) rtc_ref->ref_idx[i] = 3; |
| rtc_ref->ref_idx[SVC_LAST_FRAME] = 1; |
| if (svc->spatial_layer_id < svc->number_spatial_layers - 1) { |
| rtc_ref->ref_idx[SVC_LAST2_FRAME] = 4; |
| rtc_ref->refresh[4] = 1; |
| } |
| } else if (svc->spatial_layer_id == 2) { |
| // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 2, |
| // GOLDEN (and all other refs) to slot 4. |
| // No update. |
| for (i = 0; i < INTER_REFS_PER_FRAME; i++) rtc_ref->ref_idx[i] = 4; |
| rtc_ref->ref_idx[SVC_LAST_FRAME] = 2; |
| } |
| } else if (svc->temporal_layer_id == 1) { |
| // Middle temporal enhancement layer. |
| if (svc->spatial_layer_id == 0) { |
| // Reference LAST. |
| // Set all buffer_idx to 0. |
| // Set GOLDEN to slot 5 and update slot 5. |
| for (i = 0; i < INTER_REFS_PER_FRAME; i++) rtc_ref->ref_idx[i] = 0; |
| if (svc->temporal_layer_id < svc->number_temporal_layers - 1 || |
| svc->spatial_layer_id < svc->number_spatial_layers - 1) { |
| rtc_ref->ref_idx[SVC_GOLDEN_FRAME] = 5; |
| rtc_ref->refresh[5] = 1; |
| } |
| } else if (svc->spatial_layer_id == 1) { |
| // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 1, |
| // GOLDEN (and all other refs) to slot 5. |
| // Set LAST3 to slot 6 and update slot 6. |
| for (i = 0; i < INTER_REFS_PER_FRAME; i++) rtc_ref->ref_idx[i] = 5; |
| rtc_ref->ref_idx[SVC_LAST_FRAME] = 1; |
| if (svc->temporal_layer_id < svc->number_temporal_layers - 1 || |
| svc->spatial_layer_id < svc->number_spatial_layers - 1) { |
| rtc_ref->ref_idx[SVC_LAST3_FRAME] = 6; |
| rtc_ref->refresh[6] = 1; |
| } |
| } else if (svc->spatial_layer_id == 2) { |
| // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 2, |
| // GOLDEN (and all other refs) to slot 6. |
| // Set LAST3 to slot 7 and update slot 7. |
| for (i = 0; i < INTER_REFS_PER_FRAME; i++) rtc_ref->ref_idx[i] = 6; |
| rtc_ref->ref_idx[SVC_LAST_FRAME] = 2; |
| if (svc->temporal_layer_id < svc->number_temporal_layers - 1) { |
| rtc_ref->ref_idx[SVC_LAST3_FRAME] = 7; |
| rtc_ref->refresh[7] = 1; |
| } |
| } |
| } else if (svc->temporal_layer_id == 2 && (superframe_cnt - 3) % 4 == 0) { |
| // Second top temporal enhancement layer. |
| if (svc->spatial_layer_id == 0) { |
| // Set LAST to slot 5 and reference LAST. |
| // Set GOLDEN to slot 3 and update slot 3. |
| // Set all other buffer_idx to 0. |
| for (i = 0; i < INTER_REFS_PER_FRAME; i++) rtc_ref->ref_idx[i] = 0; |
| rtc_ref->ref_idx[SVC_LAST_FRAME] = 5; |
| if (svc->spatial_layer_id < svc->number_spatial_layers - 1) { |
| rtc_ref->ref_idx[SVC_GOLDEN_FRAME] = 3; |
| rtc_ref->refresh[3] = 1; |
| } |
| } else if (svc->spatial_layer_id == 1) { |
| // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 6, |
| // GOLDEN to slot 3. Set LAST2 to slot 4 and update slot 4. |
| for (i = 0; i < INTER_REFS_PER_FRAME; i++) rtc_ref->ref_idx[i] = 0; |
| rtc_ref->ref_idx[SVC_LAST_FRAME] = 6; |
| rtc_ref->ref_idx[SVC_GOLDEN_FRAME] = 3; |
| if (svc->spatial_layer_id < svc->number_spatial_layers - 1) { |
| rtc_ref->ref_idx[SVC_LAST2_FRAME] = 4; |
| rtc_ref->refresh[4] = 1; |
| } |
| } else if (svc->spatial_layer_id == 2) { |
| // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 7, |
| // GOLDEN to slot 4. No update. |
| for (i = 0; i < INTER_REFS_PER_FRAME; i++) rtc_ref->ref_idx[i] = 0; |
| rtc_ref->ref_idx[SVC_LAST_FRAME] = 7; |
| rtc_ref->ref_idx[SVC_GOLDEN_FRAME] = 4; |
| } |
| } |
| } |
| |
| void av1_svc_check_reset_layer_rc_flag(AV1_COMP *const cpi) { |
| SVC *const svc = &cpi->svc; |
| for (int sl = 0; sl < svc->number_spatial_layers; ++sl) { |
| // Check for reset based on avg_frame_bandwidth for spatial layer sl. |
| // If avg_frame_bandwidth for top temporal layer is not set |
| // (because enhancement layer was inactive), use the base TL0 |
| int layer = LAYER_IDS_TO_IDX(sl, svc->number_temporal_layers - 1, |
| svc->number_temporal_layers); |
| LAYER_CONTEXT *lc = &svc->layer_context[layer]; |
| RATE_CONTROL *lrc = &lc->rc; |
| int avg_frame_bandwidth = lrc->avg_frame_bandwidth; |
| int prev_avg_frame_bandwidth = lrc->prev_avg_frame_bandwidth; |
| if (avg_frame_bandwidth == 0 || prev_avg_frame_bandwidth == 0) { |
| // Use base TL0. |
| layer = LAYER_IDS_TO_IDX(sl, 0, svc->number_temporal_layers); |
| lc = &svc->layer_context[layer]; |
| lrc = &lc->rc; |
| avg_frame_bandwidth = lrc->avg_frame_bandwidth; |
| prev_avg_frame_bandwidth = lrc->prev_avg_frame_bandwidth; |
| } |
| if (avg_frame_bandwidth / 3 > (prev_avg_frame_bandwidth >> 1) || |
| avg_frame_bandwidth < (prev_avg_frame_bandwidth >> 1)) { |
| // Reset for all temporal layers with spatial layer sl. |
| for (int tl = 0; tl < svc->number_temporal_layers; ++tl) { |
| int layer2 = LAYER_IDS_TO_IDX(sl, tl, svc->number_temporal_layers); |
| LAYER_CONTEXT *lc2 = &svc->layer_context[layer2]; |
| RATE_CONTROL *lrc2 = &lc2->rc; |
| PRIMARY_RATE_CONTROL *lp_rc2 = &lc2->p_rc; |
| PRIMARY_RATE_CONTROL *const lp_rc = &lc2->p_rc; |
| lrc2->rc_1_frame = 0; |
| lrc2->rc_2_frame = 0; |
| lp_rc2->bits_off_target = lp_rc->optimal_buffer_level; |
| lp_rc2->buffer_level = lp_rc->optimal_buffer_level; |
| } |
| } |
| } |
| } |
| |
| void av1_svc_set_last_source(AV1_COMP *const cpi, EncodeFrameInput *frame_input, |
| YV12_BUFFER_CONFIG *prev_source) { |
| frame_input->last_source = prev_source != NULL ? prev_source : NULL; |
| if (!cpi->ppi->use_svc && cpi->rc.prev_frame_is_dropped && |
| cpi->rc.frame_number_encoded > 0) { |
| frame_input->last_source = &cpi->svc.source_last_TL0; |
| } else { |
| RTC_REF *const rtc_ref = &cpi->ppi->rtc_ref; |
| if (cpi->svc.spatial_layer_id == 0) { |
| // For base spatial layer: if the LAST reference (index 0) is not |
| // the previous (super)frame set the last_source to the source |
| // corresponding to the last TL0, otherwise keep it at prev_source. |
| // Always use source_last_TL0 if previous base TL0 was dropped. |
| if (cpi->svc.current_superframe > 0) { |
| const int buffslot_last = rtc_ref->ref_idx[0]; |
| // Check if previous frame was dropped on base TL0 layer. |
| const int layer = |
| LAYER_IDS_TO_IDX(0, 0, cpi->svc.number_temporal_layers); |
| LAYER_CONTEXT *lc = &cpi->svc.layer_context[layer]; |
| RATE_CONTROL *lrc = &lc->rc; |
| if (lrc->prev_frame_is_dropped || |
| rtc_ref->buffer_time_index[buffslot_last] < |
| cpi->svc.current_superframe - 1) { |
| frame_input->last_source = &cpi->svc.source_last_TL0; |
| } |
| } |
| } else if (cpi->svc.spatial_layer_id > 0) { |
| // For spatial enhancement layers: the previous source (prev_source) |
| // corresponds to the lower spatial layer (which is the same source so |
| // we can't use that), so always set the last_source to the source of the |
| // last TL0. |
| if (cpi->svc.current_superframe > 0) |
| frame_input->last_source = &cpi->svc.source_last_TL0; |
| else |
| frame_input->last_source = NULL; |
| } |
| } |
| } |
| |
| int av1_svc_get_min_ref_dist(const AV1_COMP *cpi) { |
| RTC_REF *const rtc_ref = &cpi->ppi->rtc_ref; |
| int min_dist = INT_MAX; |
| const unsigned int current_frame_num = |
| cpi->ppi->use_svc ? cpi->svc.current_superframe |
| : cpi->common.current_frame.frame_number; |
| for (unsigned int i = 0; i < INTER_REFS_PER_FRAME; i++) { |
| if (rtc_ref->reference[i]) { |
| const int ref_frame_map_idx = rtc_ref->ref_idx[i]; |
| const int dist = (1 + current_frame_num) - |
| rtc_ref->buffer_time_index[ref_frame_map_idx]; |
| if (dist < min_dist) min_dist = dist; |
| } |
| } |
| return min_dist; |
| } |
| |
| void av1_svc_set_reference_was_previous(AV1_COMP *cpi) { |
| RTC_REF *const rtc_ref = &cpi->ppi->rtc_ref; |
| // Check if the encoded frame had some reference that was the |
| // previous frame. |
| const unsigned int current_frame = |
| cpi->ppi->use_svc ? cpi->svc.current_superframe |
| : cpi->common.current_frame.frame_number; |
| rtc_ref->reference_was_previous_frame = true; |
| if (current_frame > 0) { |
| rtc_ref->reference_was_previous_frame = false; |
| for (unsigned int i = 0; i < INTER_REFS_PER_FRAME; i++) { |
| if (rtc_ref->reference[i]) { |
| const int ref_frame_map_idx = rtc_ref->ref_idx[i]; |
| if (rtc_ref->buffer_time_index[ref_frame_map_idx] == current_frame - 1) |
| rtc_ref->reference_was_previous_frame = true; |
| } |
| } |
| } |
| } |
