/* * Copyright (c) 2020, 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 "av1/common/av1_common_int.h" #include "av1/common/cfl.h" #include "av1/common/reconintra.h" #include "av1/encoder/intra_mode_search.h" #include "av1/encoder/intra_mode_search_utils.h" #include "av1/encoder/palette.h" #include "av1/encoder/speed_features.h" #include "av1/encoder/tx_search.h" // Even though there are 7 delta angles, this macro is set to 9 to facilitate // the rd threshold check to prune -3 and 3 delta angles. #define SIZE_OF_ANGLE_DELTA_RD_COST_ARRAY (2 * MAX_ANGLE_DELTA + 3) // The order for evaluating delta angles while processing the luma directional // intra modes. Currently, this order of evaluation is applicable only when // speed feature prune_luma_odd_delta_angles_in_intra is enabled. In this case, // even angles are evaluated first in order to facilitate the pruning of odd // delta angles based on the rd costs of the neighboring delta angles. static const int8_t luma_delta_angles_order[2 * MAX_ANGLE_DELTA] = { -2, 2, -3, -1, 1, 3, }; /*!\cond */ static const PREDICTION_MODE intra_rd_search_mode_order[INTRA_MODES] = { DC_PRED, H_PRED, V_PRED, SMOOTH_PRED, PAETH_PRED, SMOOTH_V_PRED, SMOOTH_H_PRED, D135_PRED, D203_PRED, D157_PRED, D67_PRED, D113_PRED, D45_PRED, }; static const UV_PREDICTION_MODE uv_rd_search_mode_order[UV_INTRA_MODES] = { UV_DC_PRED, UV_CFL_PRED, UV_H_PRED, UV_V_PRED, UV_SMOOTH_PRED, UV_PAETH_PRED, UV_SMOOTH_V_PRED, UV_SMOOTH_H_PRED, UV_D135_PRED, UV_D203_PRED, UV_D157_PRED, UV_D67_PRED, UV_D113_PRED, UV_D45_PRED, }; // The bitmask corresponds to the filter intra modes as defined in enums.h // FILTER_INTRA_MODE enumeration type. Setting a bit to 0 in the mask means to // disable the evaluation of corresponding filter intra mode. The table // av1_derived_filter_intra_mode_used_flag is used when speed feature // prune_filter_intra_level is 1. The evaluated filter intra modes are union // of the following: // 1) FILTER_DC_PRED // 2) mode that corresponds to best mode so far of DC_PRED, V_PRED, H_PRED, // D157_PRED and PAETH_PRED. (Eg: FILTER_V_PRED if best mode so far is V_PRED). static const uint8_t av1_derived_filter_intra_mode_used_flag[INTRA_MODES] = { 0x01, // DC_PRED: 0000 0001 0x03, // V_PRED: 0000 0011 0x05, // H_PRED: 0000 0101 0x01, // D45_PRED: 0000 0001 0x01, // D135_PRED: 0000 0001 0x01, // D113_PRED: 0000 0001 0x09, // D157_PRED: 0000 1001 0x01, // D203_PRED: 0000 0001 0x01, // D67_PRED: 0000 0001 0x01, // SMOOTH_PRED: 0000 0001 0x01, // SMOOTH_V_PRED: 0000 0001 0x01, // SMOOTH_H_PRED: 0000 0001 0x11 // PAETH_PRED: 0001 0001 }; // The bitmask corresponds to the chroma intra modes as defined in enums.h // UV_PREDICTION_MODE enumeration type. Setting a bit to 0 in the mask means to // disable the evaluation of corresponding chroma intra mode. The table // av1_derived_chroma_intra_mode_used_flag is used when speed feature // prune_chroma_modes_using_luma_winner is enabled. The evaluated chroma // intra modes are union of the following: // 1) UV_DC_PRED // 2) UV_SMOOTH_PRED // 3) UV_CFL_PRED // 4) mode that corresponds to luma intra mode winner (Eg : UV_V_PRED if luma // intra mode winner is V_PRED). static const uint16_t av1_derived_chroma_intra_mode_used_flag[INTRA_MODES] = { 0x2201, // DC_PRED: 0010 0010 0000 0001 0x2203, // V_PRED: 0010 0010 0000 0011 0x2205, // H_PRED: 0010 0010 0000 0101 0x2209, // D45_PRED: 0010 0010 0000 1001 0x2211, // D135_PRED: 0010 0010 0001 0001 0x2221, // D113_PRED: 0010 0010 0010 0001 0x2241, // D157_PRED: 0010 0010 0100 0001 0x2281, // D203_PRED: 0010 0010 1000 0001 0x2301, // D67_PRED: 0010 0011 0000 0001 0x2201, // SMOOTH_PRED: 0010 0010 0000 0001 0x2601, // SMOOTH_V_PRED: 0010 0110 0000 0001 0x2a01, // SMOOTH_H_PRED: 0010 1010 0000 0001 0x3201 // PAETH_PRED: 0011 0010 0000 0001 }; DECLARE_ALIGNED(16, static const uint8_t, all_zeros[MAX_SB_SIZE]) = { 0 }; DECLARE_ALIGNED(16, static const uint16_t, highbd_all_zeros[MAX_SB_SIZE]) = { 0 }; int av1_calc_normalized_variance(aom_variance_fn_t vf, const uint8_t *const buf, const int stride, const int is_hbd) { unsigned int sse; if (is_hbd) return vf(buf, stride, CONVERT_TO_BYTEPTR(highbd_all_zeros), 0, &sse); else return vf(buf, stride, all_zeros, 0, &sse); } // Computes average of log(1 + variance) across 4x4 sub-blocks for source and // reconstructed blocks. static void compute_avg_log_variance(const AV1_COMP *const cpi, MACROBLOCK *x, const BLOCK_SIZE bs, double *avg_log_src_variance, double *avg_log_recon_variance) { const MACROBLOCKD *const xd = &x->e_mbd; const BLOCK_SIZE sb_size = cpi->common.seq_params->sb_size; const int mi_row_in_sb = x->e_mbd.mi_row & (mi_size_high[sb_size] - 1); const int mi_col_in_sb = x->e_mbd.mi_col & (mi_size_wide[sb_size] - 1); const int right_overflow = (xd->mb_to_right_edge < 0) ? ((-xd->mb_to_right_edge) >> 3) : 0; const int bottom_overflow = (xd->mb_to_bottom_edge < 0) ? ((-xd->mb_to_bottom_edge) >> 3) : 0; const int bw = (MI_SIZE * mi_size_wide[bs] - right_overflow); const int bh = (MI_SIZE * mi_size_high[bs] - bottom_overflow); const int is_hbd = is_cur_buf_hbd(xd); for (int i = 0; i < bh; i += MI_SIZE) { const int r = mi_row_in_sb + (i >> MI_SIZE_LOG2); for (int j = 0; j < bw; j += MI_SIZE) { const int c = mi_col_in_sb + (j >> MI_SIZE_LOG2); const int mi_offset = r * mi_size_wide[sb_size] + c; Block4x4VarInfo *block_4x4_var_info = &x->src_var_info_of_4x4_sub_blocks[mi_offset]; int src_var = block_4x4_var_info->var; double log_src_var = block_4x4_var_info->log_var; // Compute average of log(1 + variance) for the source block from 4x4 // sub-block variance values. Calculate and store 4x4 sub-block variance // and log(1 + variance), if the values present in // src_var_of_4x4_sub_blocks are invalid. Reuse the same if it is readily // available with valid values. if (src_var < 0) { src_var = av1_calc_normalized_variance( cpi->ppi->fn_ptr[BLOCK_4X4].vf, x->plane[0].src.buf + i * x->plane[0].src.stride + j, x->plane[0].src.stride, is_hbd); block_4x4_var_info->var = src_var; log_src_var = log1p(src_var / 16.0); block_4x4_var_info->log_var = log_src_var; } else { // When source variance is already calculated and available for // retrieval, check if log(1 + variance) is also available. If it is // available, then retrieve from buffer. Else, calculate the same and // store to the buffer. if (log_src_var < 0) { log_src_var = log1p(src_var / 16.0); block_4x4_var_info->log_var = log_src_var; } } *avg_log_src_variance += log_src_var; const int recon_var = av1_calc_normalized_variance( cpi->ppi->fn_ptr[BLOCK_4X4].vf, xd->plane[0].dst.buf + i * xd->plane[0].dst.stride + j, xd->plane[0].dst.stride, is_hbd); *avg_log_recon_variance += log1p(recon_var / 16.0); } } const int blocks = (bw * bh) / 16; *avg_log_src_variance /= (double)blocks; *avg_log_recon_variance /= (double)blocks; } // Returns a factor to be applied to the RD value based on how well the // reconstructed block variance matches the source variance. static double intra_rd_variance_factor(const AV1_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bs) { double threshold = INTRA_RD_VAR_THRESH(cpi->oxcf.speed); // For non-positive threshold values, the comparison of source and // reconstructed variances with threshold evaluates to false // (src_var < threshold/rec_var < threshold) as these metrics are greater than // than 0. Hence further calculations are skipped. if (threshold <= 0) return 1.0; double variance_rd_factor = 1.0; double avg_log_src_variance = 0.0; double avg_log_recon_variance = 0.0; double var_diff = 0.0; compute_avg_log_variance(cpi, x, bs, &avg_log_src_variance, &avg_log_recon_variance); // Dont allow 0 to prevent / 0 below. avg_log_src_variance += 0.000001; avg_log_recon_variance += 0.000001; if (avg_log_src_variance >= avg_log_recon_variance) { var_diff = (avg_log_src_variance - avg_log_recon_variance); if ((var_diff > 0.5) && (avg_log_recon_variance < threshold)) { variance_rd_factor = 1.0 + ((var_diff * 2) / avg_log_src_variance); } } else { var_diff = (avg_log_recon_variance - avg_log_src_variance); if ((var_diff > 0.5) && (avg_log_src_variance < threshold)) { variance_rd_factor = 1.0 + (var_diff / (2 * avg_log_src_variance)); } } // Limit adjustment; variance_rd_factor = AOMMIN(3.0, variance_rd_factor); return variance_rd_factor; } /*!\endcond */ /*!\brief Search for the best filter_intra mode when coding intra frame. * * \ingroup intra_mode_search * \callergraph * This function loops through all filter_intra modes to find the best one. * * \return Returns 1 if a new filter_intra mode is selected; 0 otherwise. */ static int rd_pick_filter_intra_sby(const AV1_COMP *const cpi, MACROBLOCK *x, int *rate, int *rate_tokenonly, int64_t *distortion, uint8_t *skippable, BLOCK_SIZE bsize, int mode_cost, PREDICTION_MODE best_mode_so_far, int64_t *best_rd, int64_t *best_model_rd, PICK_MODE_CONTEXT *ctx) { // Skip the evaluation of filter intra modes. if (cpi->sf.intra_sf.prune_filter_intra_level == 2) return 0; MACROBLOCKD *const xd = &x->e_mbd; MB_MODE_INFO *mbmi = xd->mi[0]; int filter_intra_selected_flag = 0; FILTER_INTRA_MODE mode; TX_SIZE best_tx_size = TX_8X8; FILTER_INTRA_MODE_INFO filter_intra_mode_info; uint8_t best_tx_type_map[MAX_MIB_SIZE * MAX_MIB_SIZE]; av1_zero(filter_intra_mode_info); mbmi->filter_intra_mode_info.use_filter_intra = 1; mbmi->mode = DC_PRED; mbmi->palette_mode_info.palette_size[0] = 0; // Skip the evaluation of filter-intra if cached MB_MODE_INFO does not have // filter-intra as winner. if (x->use_mb_mode_cache && !x->mb_mode_cache->filter_intra_mode_info.use_filter_intra) return 0; for (mode = 0; mode < FILTER_INTRA_MODES; ++mode) { int64_t this_rd; RD_STATS tokenonly_rd_stats; mbmi->filter_intra_mode_info.filter_intra_mode = mode; if ((cpi->sf.intra_sf.prune_filter_intra_level == 1) && !(av1_derived_filter_intra_mode_used_flag[best_mode_so_far] & (1 << mode))) continue; // Skip the evaluation of modes that do not match with the winner mode in // x->mb_mode_cache. if (x->use_mb_mode_cache && mode != x->mb_mode_cache->filter_intra_mode_info.filter_intra_mode) continue; if (model_intra_yrd_and_prune(cpi, x, bsize, best_model_rd)) { continue; } av1_pick_uniform_tx_size_type_yrd(cpi, x, &tokenonly_rd_stats, bsize, *best_rd); if (tokenonly_rd_stats.rate == INT_MAX) continue; const int this_rate = tokenonly_rd_stats.rate + intra_mode_info_cost_y(cpi, x, mbmi, bsize, mode_cost, 0); this_rd = RDCOST(x->rdmult, this_rate, tokenonly_rd_stats.dist); // Visual quality adjustment based on recon vs source variance. if ((cpi->oxcf.mode == ALLINTRA) && (this_rd != INT64_MAX)) { this_rd = (int64_t)(this_rd * intra_rd_variance_factor(cpi, x, bsize)); } // Collect mode stats for multiwinner mode processing const int txfm_search_done = 1; store_winner_mode_stats( &cpi->common, x, mbmi, NULL, NULL, NULL, 0, NULL, bsize, this_rd, cpi->sf.winner_mode_sf.multi_winner_mode_type, txfm_search_done); if (this_rd < *best_rd) { *best_rd = this_rd; best_tx_size = mbmi->tx_size; filter_intra_mode_info = mbmi->filter_intra_mode_info; av1_copy_array(best_tx_type_map, xd->tx_type_map, ctx->num_4x4_blk); memcpy(ctx->blk_skip, x->txfm_search_info.blk_skip, sizeof(x->txfm_search_info.blk_skip[0]) * ctx->num_4x4_blk); *rate = this_rate; *rate_tokenonly = tokenonly_rd_stats.rate; *distortion = tokenonly_rd_stats.dist; *skippable = tokenonly_rd_stats.skip_txfm; filter_intra_selected_flag = 1; } } if (filter_intra_selected_flag) { mbmi->mode = DC_PRED; mbmi->tx_size = best_tx_size; mbmi->filter_intra_mode_info = filter_intra_mode_info; av1_copy_array(ctx->tx_type_map, best_tx_type_map, ctx->num_4x4_blk); return 1; } else { return 0; } } void av1_count_colors(const uint8_t *src, int stride, int rows, int cols, int *val_count, int *num_colors) { const int max_pix_val = 1 << 8; memset(val_count, 0, max_pix_val * sizeof(val_count[0])); for (int r = 0; r < rows; ++r) { for (int c = 0; c < cols; ++c) { const int this_val = src[r * stride + c]; assert(this_val < max_pix_val); ++val_count[this_val]; } } int n = 0; for (int i = 0; i < max_pix_val; ++i) { if (val_count[i]) ++n; } *num_colors = n; } void av1_count_colors_highbd(const uint8_t *src8, int stride, int rows, int cols, int bit_depth, int *val_count, int *bin_val_count, int *num_color_bins, int *num_colors) { assert(bit_depth <= 12); const int max_bin_val = 1 << 8; const int max_pix_val = 1 << bit_depth; const uint16_t *src = CONVERT_TO_SHORTPTR(src8); memset(bin_val_count, 0, max_bin_val * sizeof(val_count[0])); if (val_count != NULL) memset(val_count, 0, max_pix_val * sizeof(val_count[0])); for (int r = 0; r < rows; ++r) { for (int c = 0; c < cols; ++c) { /* * Down-convert the pixels to 8-bit domain before counting. * This provides consistency of behavior for palette search * between lbd and hbd encodes. This down-converted pixels * are only used for calculating the threshold (n). */ const int this_val = ((src[r * stride + c]) >> (bit_depth - 8)); assert(this_val < max_bin_val); if (this_val >= max_bin_val) continue; ++bin_val_count[this_val]; if (val_count != NULL) ++val_count[(src[r * stride + c])]; } } int n = 0; // Count the colors based on 8-bit domain used to gate the palette path for (int i = 0; i < max_bin_val; ++i) { if (bin_val_count[i]) ++n; } *num_color_bins = n; // Count the actual hbd colors used to create top_colors n = 0; if (val_count != NULL) { for (int i = 0; i < max_pix_val; ++i) { if (val_count[i]) ++n; } *num_colors = n; } } void set_y_mode_and_delta_angle(const int mode_idx, MB_MODE_INFO *const mbmi, int reorder_delta_angle_eval) { if (mode_idx < INTRA_MODE_END) { mbmi->mode = intra_rd_search_mode_order[mode_idx]; mbmi->angle_delta[PLANE_TYPE_Y] = 0; } else { mbmi->mode = (mode_idx - INTRA_MODE_END) / (MAX_ANGLE_DELTA * 2) + V_PRED; int delta_angle_eval_idx = (mode_idx - INTRA_MODE_END) % (MAX_ANGLE_DELTA * 2); if (reorder_delta_angle_eval) { mbmi->angle_delta[PLANE_TYPE_Y] = luma_delta_angles_order[delta_angle_eval_idx]; } else { mbmi->angle_delta[PLANE_TYPE_Y] = (delta_angle_eval_idx < 3 ? (delta_angle_eval_idx - 3) : (delta_angle_eval_idx - 2)); } } } static inline int get_model_rd_index_for_pruning( const MACROBLOCK *const x, const INTRA_MODE_SPEED_FEATURES *const intra_sf) { const int top_intra_model_count_allowed = intra_sf->top_intra_model_count_allowed; if (!intra_sf->adapt_top_model_rd_count_using_neighbors) return top_intra_model_count_allowed - 1; const MACROBLOCKD *const xd = &x->e_mbd; const PREDICTION_MODE mode = xd->mi[0]->mode; int model_rd_index_for_pruning = top_intra_model_count_allowed - 1; int is_left_mode_neq_cur_mode = 0, is_above_mode_neq_cur_mode = 0; if (xd->left_available) is_left_mode_neq_cur_mode = xd->left_mbmi->mode != mode; if (xd->up_available) is_above_mode_neq_cur_mode = xd->above_mbmi->mode != mode; // The pruning of luma intra modes is made more aggressive at lower quantizers // and vice versa. The value for model_rd_index_for_pruning is derived as // follows. // qidx 0 to 127: Reduce the index of a candidate used for comparison only if // the current mode does not match either of the available neighboring modes. // qidx 128 to 255: Reduce the index of a candidate used for comparison only // if the current mode does not match both the available neighboring modes. if (x->qindex <= 127) { if (is_left_mode_neq_cur_mode || is_above_mode_neq_cur_mode) model_rd_index_for_pruning = AOMMAX(model_rd_index_for_pruning - 1, 0); } else { if (is_left_mode_neq_cur_mode && is_above_mode_neq_cur_mode) model_rd_index_for_pruning = AOMMAX(model_rd_index_for_pruning - 1, 0); } return model_rd_index_for_pruning; } /*! \brief prune luma intra mode based on the model rd. * \param[in] this_model_rd model rd for current mode. * \param[in] best_model_rd Best model RD seen for this block so * far. * \param[in] top_intra_model_rd Top intra model RD seen for this * block so far. * \param[in] max_model_cnt_allowed The maximum number of top intra * model RD allowed. * \param[in] model_rd_index_for_pruning Index of the candidate used for * pruning based on model rd. */ static int prune_intra_y_mode(int64_t this_model_rd, int64_t *best_model_rd, int64_t top_intra_model_rd[], int max_model_cnt_allowed, int model_rd_index_for_pruning) { const double thresh_best = 1.50; const double thresh_top = 1.00; for (int i = 0; i < max_model_cnt_allowed; i++) { if (this_model_rd < top_intra_model_rd[i]) { for (int j = max_model_cnt_allowed - 1; j > i; j--) { top_intra_model_rd[j] = top_intra_model_rd[j - 1]; } top_intra_model_rd[i] = this_model_rd; break; } } if (top_intra_model_rd[model_rd_index_for_pruning] != INT64_MAX && this_model_rd > thresh_top * top_intra_model_rd[model_rd_index_for_pruning]) return 1; if (this_model_rd != INT64_MAX && this_model_rd > thresh_best * (*best_model_rd)) return 1; if (this_model_rd < *best_model_rd) *best_model_rd = this_model_rd; return 0; } // Run RD calculation with given chroma intra prediction angle., and return // the RD cost. Update the best mode info. if the RD cost is the best so far. static int64_t pick_intra_angle_routine_sbuv( const AV1_COMP *const cpi, MACROBLOCK *x, BLOCK_SIZE bsize, int rate_overhead, int64_t best_rd_in, int *rate, RD_STATS *rd_stats, int *best_angle_delta, int64_t *best_rd) { MB_MODE_INFO *mbmi = x->e_mbd.mi[0]; assert(!is_inter_block(mbmi)); int this_rate; int64_t this_rd; RD_STATS tokenonly_rd_stats; if (!av1_txfm_uvrd(cpi, x, &tokenonly_rd_stats, bsize, best_rd_in)) return INT64_MAX; this_rate = tokenonly_rd_stats.rate + intra_mode_info_cost_uv(cpi, x, mbmi, bsize, rate_overhead); this_rd = RDCOST(x->rdmult, this_rate, tokenonly_rd_stats.dist); if (this_rd < *best_rd) { *best_rd = this_rd; *best_angle_delta = mbmi->angle_delta[PLANE_TYPE_UV]; *rate = this_rate; rd_stats->rate = tokenonly_rd_stats.rate; rd_stats->dist = tokenonly_rd_stats.dist; rd_stats->skip_txfm = tokenonly_rd_stats.skip_txfm; } return this_rd; } /*!\brief Search for the best angle delta for chroma prediction * * \ingroup intra_mode_search * \callergraph * Given a chroma directional intra prediction mode, this function will try to * estimate the best delta_angle. * * \returns Return if there is a new mode with smaller rdcost than best_rd. */ static int rd_pick_intra_angle_sbuv(const AV1_COMP *const cpi, MACROBLOCK *x, BLOCK_SIZE bsize, int rate_overhead, int64_t best_rd, int *rate, RD_STATS *rd_stats) { MACROBLOCKD *const xd = &x->e_mbd; MB_MODE_INFO *mbmi = xd->mi[0]; assert(!is_inter_block(mbmi)); int i, angle_delta, best_angle_delta = 0; int64_t this_rd, best_rd_in, rd_cost[2 * (MAX_ANGLE_DELTA + 2)]; rd_stats->rate = INT_MAX; rd_stats->skip_txfm = 0; rd_stats->dist = INT64_MAX; for (i = 0; i < 2 * (MAX_ANGLE_DELTA + 2); ++i) rd_cost[i] = INT64_MAX; for (angle_delta = 0; angle_delta <= MAX_ANGLE_DELTA; angle_delta += 2) { for (i = 0; i < 2; ++i) { best_rd_in = (best_rd == INT64_MAX) ? INT64_MAX : (best_rd + (best_rd >> ((angle_delta == 0) ? 3 : 5))); mbmi->angle_delta[PLANE_TYPE_UV] = (1 - 2 * i) * angle_delta; this_rd = pick_intra_angle_routine_sbuv(cpi, x, bsize, rate_overhead, best_rd_in, rate, rd_stats, &best_angle_delta, &best_rd); rd_cost[2 * angle_delta + i] = this_rd; if (angle_delta == 0) { if (this_rd == INT64_MAX) return 0; rd_cost[1] = this_rd; break; } } } assert(best_rd != INT64_MAX); for (angle_delta = 1; angle_delta <= MAX_ANGLE_DELTA; angle_delta += 2) { int64_t rd_thresh; for (i = 0; i < 2; ++i) { int skip_search = 0; rd_thresh = best_rd + (best_rd >> 5); if (rd_cost[2 * (angle_delta + 1) + i] > rd_thresh && rd_cost[2 * (angle_delta - 1) + i] > rd_thresh) skip_search = 1; if (!skip_search) { mbmi->angle_delta[PLANE_TYPE_UV] = (1 - 2 * i) * angle_delta; pick_intra_angle_routine_sbuv(cpi, x, bsize, rate_overhead, best_rd, rate, rd_stats, &best_angle_delta, &best_rd); } } } mbmi->angle_delta[PLANE_TYPE_UV] = best_angle_delta; return rd_stats->rate != INT_MAX; } #define PLANE_SIGN_TO_JOINT_SIGN(plane, a, b) \ (plane == CFL_PRED_U ? a * CFL_SIGNS + b - 1 : b * CFL_SIGNS + a - 1) static void cfl_idx_to_sign_and_alpha(int cfl_idx, CFL_SIGN_TYPE *cfl_sign, int *cfl_alpha) { int cfl_linear_idx = cfl_idx - CFL_INDEX_ZERO; if (cfl_linear_idx == 0) { *cfl_sign = CFL_SIGN_ZERO; *cfl_alpha = 0; } else { *cfl_sign = cfl_linear_idx > 0 ? CFL_SIGN_POS : CFL_SIGN_NEG; *cfl_alpha = abs(cfl_linear_idx) - 1; } } static int64_t cfl_compute_rd(const AV1_COMP *const cpi, MACROBLOCK *x, int plane, TX_SIZE tx_size, BLOCK_SIZE plane_bsize, int cfl_idx, int fast_mode, RD_STATS *rd_stats) { assert(IMPLIES(fast_mode, rd_stats == NULL)); const AV1_COMMON *const cm = &cpi->common; MACROBLOCKD *const xd = &x->e_mbd; MB_MODE_INFO *const mbmi = xd->mi[0]; int cfl_plane = get_cfl_pred_type(plane); CFL_SIGN_TYPE cfl_sign; int cfl_alpha; cfl_idx_to_sign_and_alpha(cfl_idx, &cfl_sign, &cfl_alpha); // We conly build CFL for a given plane, the other plane's sign is dummy int dummy_sign = CFL_SIGN_NEG; const int8_t orig_cfl_alpha_signs = mbmi->cfl_alpha_signs; const uint8_t orig_cfl_alpha_idx = mbmi->cfl_alpha_idx; mbmi->cfl_alpha_signs = PLANE_SIGN_TO_JOINT_SIGN(cfl_plane, cfl_sign, dummy_sign); mbmi->cfl_alpha_idx = (cfl_alpha << CFL_ALPHABET_SIZE_LOG2) + cfl_alpha; int64_t cfl_cost; if (fast_mode) { cfl_cost = intra_model_rd(cm, x, plane, plane_bsize, tx_size, /*use_hadamard=*/0); } else { av1_init_rd_stats(rd_stats); av1_txfm_rd_in_plane(x, cpi, rd_stats, INT64_MAX, 0, plane, plane_bsize, tx_size, FTXS_NONE, 0); av1_rd_cost_update(x->rdmult, rd_stats); cfl_cost = rd_stats->rdcost; } mbmi->cfl_alpha_signs = orig_cfl_alpha_signs; mbmi->cfl_alpha_idx = orig_cfl_alpha_idx; return cfl_cost; } static const int cfl_dir_ls[2] = { 1, -1 }; // If cfl_search_range is CFL_MAGS_SIZE, return zero. Otherwise return the index // of the best alpha found using intra_model_rd(). static int cfl_pick_plane_parameter(const AV1_COMP *const cpi, MACROBLOCK *x, int plane, TX_SIZE tx_size, int cfl_search_range) { assert(cfl_search_range >= 1 && cfl_search_range <= CFL_MAGS_SIZE); if (cfl_search_range == CFL_MAGS_SIZE) return CFL_INDEX_ZERO; const MACROBLOCKD *const xd = &x->e_mbd; const MB_MODE_INFO *const mbmi = xd->mi[0]; assert(mbmi->uv_mode == UV_CFL_PRED); const MACROBLOCKD_PLANE *pd = &xd->plane[plane]; const BLOCK_SIZE plane_bsize = get_plane_block_size(mbmi->bsize, pd->subsampling_x, pd->subsampling_y); int est_best_cfl_idx = CFL_INDEX_ZERO; int fast_mode = 1; int start_cfl_idx = CFL_INDEX_ZERO; int64_t best_cfl_cost = cfl_compute_rd(cpi, x, plane, tx_size, plane_bsize, start_cfl_idx, fast_mode, NULL); for (int si = 0; si < 2; ++si) { const int dir = cfl_dir_ls[si]; for (int i = 1; i < CFL_MAGS_SIZE; ++i) { int cfl_idx = start_cfl_idx + dir * i; if (cfl_idx < 0 || cfl_idx >= CFL_MAGS_SIZE) break; int64_t cfl_cost = cfl_compute_rd(cpi, x, plane, tx_size, plane_bsize, cfl_idx, fast_mode, NULL); if (cfl_cost < best_cfl_cost) { best_cfl_cost = cfl_cost; est_best_cfl_idx = cfl_idx; } else { break; } } } return est_best_cfl_idx; } static inline void set_invalid_cfl_parameters(uint8_t *best_cfl_alpha_idx, int8_t *best_cfl_alpha_signs) { *best_cfl_alpha_idx = 0; *best_cfl_alpha_signs = 0; } static void cfl_pick_plane_rd(const AV1_COMP *const cpi, MACROBLOCK *x, int plane, TX_SIZE tx_size, int cfl_search_range, RD_STATS cfl_rd_arr[CFL_MAGS_SIZE], int est_best_cfl_idx) { assert(cfl_search_range >= 1 && cfl_search_range <= CFL_MAGS_SIZE); const MACROBLOCKD *const xd = &x->e_mbd; const MB_MODE_INFO *const mbmi = xd->mi[0]; assert(mbmi->uv_mode == UV_CFL_PRED); const MACROBLOCKD_PLANE *pd = &xd->plane[plane]; const BLOCK_SIZE plane_bsize = get_plane_block_size(mbmi->bsize, pd->subsampling_x, pd->subsampling_y); for (int cfl_idx = 0; cfl_idx < CFL_MAGS_SIZE; ++cfl_idx) { av1_invalid_rd_stats(&cfl_rd_arr[cfl_idx]); } int fast_mode = 0; int start_cfl_idx = est_best_cfl_idx; cfl_compute_rd(cpi, x, plane, tx_size, plane_bsize, start_cfl_idx, fast_mode, &cfl_rd_arr[start_cfl_idx]); if (cfl_search_range == 1) return; for (int si = 0; si < 2; ++si) { const int dir = cfl_dir_ls[si]; for (int i = 1; i < cfl_search_range; ++i) { int cfl_idx = start_cfl_idx + dir * i; if (cfl_idx < 0 || cfl_idx >= CFL_MAGS_SIZE) break; cfl_compute_rd(cpi, x, plane, tx_size, plane_bsize, cfl_idx, fast_mode, &cfl_rd_arr[cfl_idx]); } } } /*!\brief Pick the optimal parameters for Chroma to Luma (CFL) component * * \ingroup intra_mode_search * \callergraph * * This function will use DCT_DCT followed by computing SATD (sum of absolute * transformed differences) to estimate the RD score and find the best possible * CFL parameter. * * Then the function will apply a full RD search near the best possible CFL * parameter to find the best actual CFL parameter. * * Side effect: * We use ths buffers in x->plane[] and xd->plane[] as throw-away buffers for RD * search. * * \param[in] x Encoder prediction block structure. * \param[in] cpi Top-level encoder instance structure. * \param[in] tx_size Transform size. * \param[in] ref_best_rd Reference best RD. * \param[in] cfl_search_range The search range of full RD search near the * estimated best CFL parameter. * * \param[out] best_rd_stats RD stats of the best CFL parameter * \param[out] best_cfl_alpha_idx Best CFL alpha index * \param[out] best_cfl_alpha_signs Best CFL joint signs * */ static int cfl_rd_pick_alpha(MACROBLOCK *const x, const AV1_COMP *const cpi, TX_SIZE tx_size, int64_t ref_best_rd, int cfl_search_range, RD_STATS *best_rd_stats, uint8_t *best_cfl_alpha_idx, int8_t *best_cfl_alpha_signs) { assert(cfl_search_range >= 1 && cfl_search_range <= CFL_MAGS_SIZE); const ModeCosts *mode_costs = &x->mode_costs; RD_STATS cfl_rd_arr_u[CFL_MAGS_SIZE]; RD_STATS cfl_rd_arr_v[CFL_MAGS_SIZE]; MACROBLOCKD *const xd = &x->e_mbd; int est_best_cfl_idx_u, est_best_cfl_idx_v; av1_invalid_rd_stats(best_rd_stats); // As the dc pred data is same for different values of alpha, enable the // caching of dc pred data. Call clear_cfl_dc_pred_cache_flags() before // returning to avoid the unintentional usage of cached dc pred data. xd->cfl.use_dc_pred_cache = true; // Evaluate alpha parameter of each chroma plane. est_best_cfl_idx_u = cfl_pick_plane_parameter(cpi, x, 1, tx_size, cfl_search_range); est_best_cfl_idx_v = cfl_pick_plane_parameter(cpi, x, 2, tx_size, cfl_search_range); if (cfl_search_range == 1) { // For cfl_search_range=1, further refinement of alpha is not enabled. Hence // CfL index=0 for both the chroma planes implies invalid CfL mode. if (est_best_cfl_idx_u == CFL_INDEX_ZERO && est_best_cfl_idx_v == CFL_INDEX_ZERO) { set_invalid_cfl_parameters(best_cfl_alpha_idx, best_cfl_alpha_signs); clear_cfl_dc_pred_cache_flags(&xd->cfl); return 0; } int cfl_alpha_u, cfl_alpha_v; CFL_SIGN_TYPE cfl_sign_u, cfl_sign_v; const MB_MODE_INFO *mbmi = xd->mi[0]; cfl_idx_to_sign_and_alpha(est_best_cfl_idx_u, &cfl_sign_u, &cfl_alpha_u); cfl_idx_to_sign_and_alpha(est_best_cfl_idx_v, &cfl_sign_v, &cfl_alpha_v); const int joint_sign = cfl_sign_u * CFL_SIGNS + cfl_sign_v - 1; // Compute alpha and mode signaling rate. const int rate_overhead = mode_costs->cfl_cost[joint_sign][CFL_PRED_U][cfl_alpha_u] + mode_costs->cfl_cost[joint_sign][CFL_PRED_V][cfl_alpha_v] + mode_costs ->intra_uv_mode_cost[is_cfl_allowed(xd)][mbmi->mode][UV_CFL_PRED]; // Skip the CfL mode evaluation if the RD cost derived using the rate needed // to signal the CfL mode and alpha parameter exceeds the ref_best_rd. if (RDCOST(x->rdmult, rate_overhead, 0) > ref_best_rd) { set_invalid_cfl_parameters(best_cfl_alpha_idx, best_cfl_alpha_signs); clear_cfl_dc_pred_cache_flags(&xd->cfl); return 0; } } // Compute the rd cost of each chroma plane using the alpha parameters which // were already evaluated. cfl_pick_plane_rd(cpi, x, 1, tx_size, cfl_search_range, cfl_rd_arr_u, est_best_cfl_idx_u); cfl_pick_plane_rd(cpi, x, 2, tx_size, cfl_search_range, cfl_rd_arr_v, est_best_cfl_idx_v); clear_cfl_dc_pred_cache_flags(&xd->cfl); for (int ui = 0; ui < CFL_MAGS_SIZE; ++ui) { if (cfl_rd_arr_u[ui].rate == INT_MAX) continue; int cfl_alpha_u; CFL_SIGN_TYPE cfl_sign_u; cfl_idx_to_sign_and_alpha(ui, &cfl_sign_u, &cfl_alpha_u); for (int vi = 0; vi < CFL_MAGS_SIZE; ++vi) { if (cfl_rd_arr_v[vi].rate == INT_MAX) continue; int cfl_alpha_v; CFL_SIGN_TYPE cfl_sign_v; cfl_idx_to_sign_and_alpha(vi, &cfl_sign_v, &cfl_alpha_v); // cfl_sign_u == CFL_SIGN_ZERO && cfl_sign_v == CFL_SIGN_ZERO is not a // valid parameter for CFL if (cfl_sign_u == CFL_SIGN_ZERO && cfl_sign_v == CFL_SIGN_ZERO) continue; int joint_sign = cfl_sign_u * CFL_SIGNS + cfl_sign_v - 1; RD_STATS rd_stats = cfl_rd_arr_u[ui]; av1_merge_rd_stats(&rd_stats, &cfl_rd_arr_v[vi]); if (rd_stats.rate != INT_MAX) { rd_stats.rate += mode_costs->cfl_cost[joint_sign][CFL_PRED_U][cfl_alpha_u]; rd_stats.rate += mode_costs->cfl_cost[joint_sign][CFL_PRED_V][cfl_alpha_v]; } av1_rd_cost_update(x->rdmult, &rd_stats); if (rd_stats.rdcost < best_rd_stats->rdcost) { *best_rd_stats = rd_stats; *best_cfl_alpha_idx = (cfl_alpha_u << CFL_ALPHABET_SIZE_LOG2) + cfl_alpha_v; *best_cfl_alpha_signs = joint_sign; } } } if (best_rd_stats->rdcost >= ref_best_rd) { av1_invalid_rd_stats(best_rd_stats); // Set invalid CFL parameters here since the rdcost is not better than // ref_best_rd. set_invalid_cfl_parameters(best_cfl_alpha_idx, best_cfl_alpha_signs); return 0; } return 1; } static bool should_prune_chroma_smooth_pred_based_on_source_variance( const AV1_COMP *cpi, const MACROBLOCK *x, BLOCK_SIZE bsize) { if (!cpi->sf.intra_sf.prune_smooth_intra_mode_for_chroma) return false; // If the source variance of both chroma planes is less than 20 (empirically // derived), prune UV_SMOOTH_PRED. for (int i = AOM_PLANE_U; i < av1_num_planes(&cpi->common); i++) { const unsigned int variance = av1_get_perpixel_variance_facade( cpi, &x->e_mbd, &x->plane[i].src, bsize, i); if (variance >= 20) return false; } return true; } int64_t av1_rd_pick_intra_sbuv_mode(const AV1_COMP *const cpi, MACROBLOCK *x, int *rate, int *rate_tokenonly, int64_t *distortion, uint8_t *skippable, BLOCK_SIZE bsize, TX_SIZE max_tx_size) { const AV1_COMMON *const cm = &cpi->common; MACROBLOCKD *xd = &x->e_mbd; MB_MODE_INFO *mbmi = xd->mi[0]; assert(!is_inter_block(mbmi)); MB_MODE_INFO best_mbmi = *mbmi; int64_t best_rd = INT64_MAX, this_rd; const ModeCosts *mode_costs = &x->mode_costs; const IntraModeCfg *const intra_mode_cfg = &cpi->oxcf.intra_mode_cfg; init_sbuv_mode(mbmi); // Return if the current block does not correspond to a chroma block. if (!xd->is_chroma_ref) { *rate = 0; *rate_tokenonly = 0; *distortion = 0; *skippable = 1; return INT64_MAX; } // Only store reconstructed luma when there's chroma RDO. When there's no // chroma RDO, the reconstructed luma will be stored in encode_superblock(). xd->cfl.store_y = store_cfl_required_rdo(cm, x); if (xd->cfl.store_y) { // Restore reconstructed luma values. // TODO(chiyotsai@google.com): right now we are re-computing the txfm in // this function everytime we search through uv modes. There is some // potential speed up here if we cache the result to avoid redundant // computation. av1_encode_intra_block_plane(cpi, x, mbmi->bsize, AOM_PLANE_Y, DRY_RUN_NORMAL, cpi->optimize_seg_arr[mbmi->segment_id]); xd->cfl.store_y = 0; } IntraModeSearchState intra_search_state; init_intra_mode_search_state(&intra_search_state); const CFL_ALLOWED_TYPE cfl_allowed = is_cfl_allowed(xd); // Search through all non-palette modes. for (int mode_idx = 0; mode_idx < UV_INTRA_MODES; ++mode_idx) { int this_rate; RD_STATS tokenonly_rd_stats; UV_PREDICTION_MODE uv_mode = uv_rd_search_mode_order[mode_idx]; // Skip the current mode evaluation if the RD cost derived using the mode // signaling rate exceeds the best_rd so far. const int mode_rate = mode_costs->intra_uv_mode_cost[cfl_allowed][mbmi->mode][uv_mode]; if (RDCOST(x->rdmult, mode_rate, 0) > best_rd) continue; PREDICTION_MODE intra_mode = get_uv_mode(uv_mode); const int is_diagonal_mode = av1_is_diagonal_mode(intra_mode); const int is_directional_mode = av1_is_directional_mode(intra_mode); if (is_diagonal_mode && !cpi->oxcf.intra_mode_cfg.enable_diagonal_intra) continue; if (is_directional_mode && !cpi->oxcf.intra_mode_cfg.enable_directional_intra) continue; if (!(cpi->sf.intra_sf.intra_uv_mode_mask[txsize_sqr_up_map[max_tx_size]] & (1 << uv_mode))) continue; if (!intra_mode_cfg->enable_smooth_intra && uv_mode >= UV_SMOOTH_PRED && uv_mode <= UV_SMOOTH_H_PRED) continue; if (!intra_mode_cfg->enable_paeth_intra && uv_mode == UV_PAETH_PRED) continue; assert(mbmi->mode < INTRA_MODES); if (cpi->sf.intra_sf.prune_chroma_modes_using_luma_winner && !(av1_derived_chroma_intra_mode_used_flag[mbmi->mode] & (1 << uv_mode))) continue; mbmi->uv_mode = uv_mode; // Init variables for cfl and angle delta const SPEED_FEATURES *sf = &cpi->sf; mbmi->angle_delta[PLANE_TYPE_UV] = 0; if (uv_mode == UV_CFL_PRED) { if (!cfl_allowed || !intra_mode_cfg->enable_cfl_intra) continue; assert(!is_directional_mode); const TX_SIZE uv_tx_size = av1_get_tx_size(AOM_PLANE_U, xd); if (!cfl_rd_pick_alpha(x, cpi, uv_tx_size, best_rd, sf->intra_sf.cfl_search_range, &tokenonly_rd_stats, &mbmi->cfl_alpha_idx, &mbmi->cfl_alpha_signs)) { continue; } } else if (is_directional_mode && av1_use_angle_delta(mbmi->bsize) && intra_mode_cfg->enable_angle_delta) { if (sf->intra_sf.chroma_intra_pruning_with_hog && !intra_search_state.dir_mode_skip_mask_ready) { static const float thresh[2][4] = { { -1.2f, 0.0f, 0.0f, 1.2f }, // Interframe { -1.2f, -1.2f, -0.6f, 0.4f }, // Intraframe }; const int is_chroma = 1; const int is_intra_frame = frame_is_intra_only(cm); prune_intra_mode_with_hog( x, bsize, cm->seq_params->sb_size, thresh[is_intra_frame] [sf->intra_sf.chroma_intra_pruning_with_hog - 1], intra_search_state.directional_mode_skip_mask, is_chroma); intra_search_state.dir_mode_skip_mask_ready = 1; } if (intra_search_state.directional_mode_skip_mask[uv_mode]) { continue; } // Search through angle delta const int rate_overhead = mode_costs->intra_uv_mode_cost[cfl_allowed][mbmi->mode][uv_mode]; if (!rd_pick_intra_angle_sbuv(cpi, x, bsize, rate_overhead, best_rd, &this_rate, &tokenonly_rd_stats)) continue; } else { if (uv_mode == UV_SMOOTH_PRED && should_prune_chroma_smooth_pred_based_on_source_variance(cpi, x, bsize)) continue; // Predict directly if we don't need to search for angle delta. if (!av1_txfm_uvrd(cpi, x, &tokenonly_rd_stats, bsize, best_rd)) { continue; } } const int mode_cost = mode_costs->intra_uv_mode_cost[cfl_allowed][mbmi->mode][uv_mode]; this_rate = tokenonly_rd_stats.rate + intra_mode_info_cost_uv(cpi, x, mbmi, bsize, mode_cost); this_rd = RDCOST(x->rdmult, this_rate, tokenonly_rd_stats.dist); if (this_rd < best_rd) { best_mbmi = *mbmi; best_rd = this_rd; *rate = this_rate; *rate_tokenonly = tokenonly_rd_stats.rate; *distortion = tokenonly_rd_stats.dist; *skippable = tokenonly_rd_stats.skip_txfm; } } // Search palette mode const int try_palette = cpi->oxcf.tool_cfg.enable_palette && av1_allow_palette(cpi->common.features.allow_screen_content_tools, mbmi->bsize); if (try_palette) { uint8_t *best_palette_color_map = x->palette_buffer->best_palette_color_map; av1_rd_pick_palette_intra_sbuv( cpi, x, mode_costs->intra_uv_mode_cost[cfl_allowed][mbmi->mode][UV_DC_PRED], best_palette_color_map, &best_mbmi, &best_rd, rate, rate_tokenonly, distortion, skippable); } *mbmi = best_mbmi; // Make sure we actually chose a mode assert(best_rd < INT64_MAX); return best_rd; } // Searches palette mode for luma channel in inter frame. int av1_search_palette_mode(IntraModeSearchState *intra_search_state, const AV1_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bsize, unsigned int ref_frame_cost, PICK_MODE_CONTEXT *ctx, RD_STATS *this_rd_cost, int64_t best_rd) { const AV1_COMMON *const cm = &cpi->common; MB_MODE_INFO *const mbmi = x->e_mbd.mi[0]; PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info; const int num_planes = av1_num_planes(cm); MACROBLOCKD *const xd = &x->e_mbd; int rate2 = 0; int64_t distortion2 = 0, best_rd_palette = best_rd, this_rd; int skippable = 0; uint8_t *const best_palette_color_map = x->palette_buffer->best_palette_color_map; uint8_t *const color_map = xd->plane[0].color_index_map; MB_MODE_INFO best_mbmi_palette = *mbmi; uint8_t best_blk_skip[MAX_MIB_SIZE * MAX_MIB_SIZE]; uint8_t best_tx_type_map[MAX_MIB_SIZE * MAX_MIB_SIZE]; const ModeCosts *mode_costs = &x->mode_costs; const int *const intra_mode_cost = mode_costs->mbmode_cost[size_group_lookup[bsize]]; const int rows = block_size_high[bsize]; const int cols = block_size_wide[bsize]; mbmi->mode = DC_PRED; mbmi->uv_mode = UV_DC_PRED; mbmi->ref_frame[0] = INTRA_FRAME; mbmi->ref_frame[1] = NONE_FRAME; av1_zero(pmi->palette_size); RD_STATS rd_stats_y; av1_invalid_rd_stats(&rd_stats_y); av1_rd_pick_palette_intra_sby(cpi, x, bsize, intra_mode_cost[DC_PRED], &best_mbmi_palette, best_palette_color_map, &best_rd_palette, &rd_stats_y.rate, NULL, &rd_stats_y.dist, &rd_stats_y.skip_txfm, NULL, ctx, best_blk_skip, best_tx_type_map); if (rd_stats_y.rate == INT_MAX || pmi->palette_size[0] == 0) { this_rd_cost->rdcost = INT64_MAX; return skippable; } memcpy(x->txfm_search_info.blk_skip, best_blk_skip, sizeof(best_blk_skip[0]) * bsize_to_num_blk(bsize)); av1_copy_array(xd->tx_type_map, best_tx_type_map, ctx->num_4x4_blk); memcpy(color_map, best_palette_color_map, rows * cols * sizeof(best_palette_color_map[0])); skippable = rd_stats_y.skip_txfm; distortion2 = rd_stats_y.dist; rate2 = rd_stats_y.rate + ref_frame_cost; if (num_planes > 1) { if (intra_search_state->rate_uv_intra == INT_MAX) { // We have not found any good uv mode yet, so we need to search for it. TX_SIZE uv_tx = av1_get_tx_size(AOM_PLANE_U, xd); av1_rd_pick_intra_sbuv_mode(cpi, x, &intra_search_state->rate_uv_intra, &intra_search_state->rate_uv_tokenonly, &intra_search_state->dist_uvs, &intra_search_state->skip_uvs, bsize, uv_tx); intra_search_state->mode_uv = mbmi->uv_mode; intra_search_state->pmi_uv = *pmi; intra_search_state->uv_angle_delta = mbmi->angle_delta[PLANE_TYPE_UV]; } // We have found at least one good uv mode before, so copy and paste it // over. mbmi->uv_mode = intra_search_state->mode_uv; pmi->palette_size[1] = intra_search_state->pmi_uv.palette_size[1]; if (pmi->palette_size[1] > 0) { memcpy(pmi->palette_colors + PALETTE_MAX_SIZE, intra_search_state->pmi_uv.palette_colors + PALETTE_MAX_SIZE, 2 * PALETTE_MAX_SIZE * sizeof(pmi->palette_colors[0])); } mbmi->angle_delta[PLANE_TYPE_UV] = intra_search_state->uv_angle_delta; skippable = skippable && intra_search_state->skip_uvs; distortion2 += intra_search_state->dist_uvs; rate2 += intra_search_state->rate_uv_intra; } if (skippable) { rate2 -= rd_stats_y.rate; if (num_planes > 1) rate2 -= intra_search_state->rate_uv_tokenonly; rate2 += mode_costs->skip_txfm_cost[av1_get_skip_txfm_context(xd)][1]; } else { rate2 += mode_costs->skip_txfm_cost[av1_get_skip_txfm_context(xd)][0]; } this_rd = RDCOST(x->rdmult, rate2, distortion2); this_rd_cost->rate = rate2; this_rd_cost->dist = distortion2; this_rd_cost->rdcost = this_rd; return skippable; } void av1_search_palette_mode_luma(const AV1_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bsize, unsigned int ref_frame_cost, PICK_MODE_CONTEXT *ctx, RD_STATS *this_rd_cost, int64_t best_rd) { MB_MODE_INFO *const mbmi = x->e_mbd.mi[0]; PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info; MACROBLOCKD *const xd = &x->e_mbd; int64_t best_rd_palette = best_rd, this_rd; uint8_t *const best_palette_color_map = x->palette_buffer->best_palette_color_map; uint8_t *const color_map = xd->plane[0].color_index_map; MB_MODE_INFO best_mbmi_palette = *mbmi; uint8_t best_blk_skip[MAX_MIB_SIZE * MAX_MIB_SIZE]; uint8_t best_tx_type_map[MAX_MIB_SIZE * MAX_MIB_SIZE]; const ModeCosts *mode_costs = &x->mode_costs; const int *const intra_mode_cost = mode_costs->mbmode_cost[size_group_lookup[bsize]]; const int rows = block_size_high[bsize]; const int cols = block_size_wide[bsize]; mbmi->mode = DC_PRED; mbmi->uv_mode = UV_DC_PRED; mbmi->ref_frame[0] = INTRA_FRAME; mbmi->ref_frame[1] = NONE_FRAME; av1_zero(pmi->palette_size); RD_STATS rd_stats_y; av1_invalid_rd_stats(&rd_stats_y); av1_rd_pick_palette_intra_sby(cpi, x, bsize, intra_mode_cost[DC_PRED], &best_mbmi_palette, best_palette_color_map, &best_rd_palette, &rd_stats_y.rate, NULL, &rd_stats_y.dist, &rd_stats_y.skip_txfm, NULL, ctx, best_blk_skip, best_tx_type_map); if (rd_stats_y.rate == INT_MAX || pmi->palette_size[0] == 0) { this_rd_cost->rdcost = INT64_MAX; return; } memcpy(x->txfm_search_info.blk_skip, best_blk_skip, sizeof(best_blk_skip[0]) * bsize_to_num_blk(bsize)); av1_copy_array(xd->tx_type_map, best_tx_type_map, ctx->num_4x4_blk); memcpy(color_map, best_palette_color_map, rows * cols * sizeof(best_palette_color_map[0])); rd_stats_y.rate += ref_frame_cost; if (rd_stats_y.skip_txfm) { rd_stats_y.rate = ref_frame_cost + mode_costs->skip_txfm_cost[av1_get_skip_txfm_context(xd)][1]; } else { rd_stats_y.rate += mode_costs->skip_txfm_cost[av1_get_skip_txfm_context(xd)][0]; } this_rd = RDCOST(x->rdmult, rd_stats_y.rate, rd_stats_y.dist); this_rd_cost->rate = rd_stats_y.rate; this_rd_cost->dist = rd_stats_y.dist; this_rd_cost->rdcost = this_rd; this_rd_cost->skip_txfm = rd_stats_y.skip_txfm; } /*!\brief Get the intra prediction by searching through tx_type and tx_size. * * \ingroup intra_mode_search * \callergraph * Currently this function is only used in the intra frame code path for * winner-mode processing. * * \return Returns whether the current mode is an improvement over best_rd. */ static inline int intra_block_yrd(const AV1_COMP *const cpi, MACROBLOCK *x, BLOCK_SIZE bsize, const int *bmode_costs, int64_t *best_rd, int *rate, int *rate_tokenonly, int64_t *distortion, uint8_t *skippable, MB_MODE_INFO *best_mbmi, PICK_MODE_CONTEXT *ctx) { MACROBLOCKD *const xd = &x->e_mbd; MB_MODE_INFO *const mbmi = xd->mi[0]; RD_STATS rd_stats; // In order to improve txfm search, avoid rd based breakouts during winner // mode evaluation. Hence passing ref_best_rd as INT64_MAX by default when the // speed feature use_rd_based_breakout_for_intra_tx_search is disabled. int64_t ref_best_rd = cpi->sf.tx_sf.use_rd_based_breakout_for_intra_tx_search ? *best_rd : INT64_MAX; av1_pick_uniform_tx_size_type_yrd(cpi, x, &rd_stats, bsize, ref_best_rd); if (rd_stats.rate == INT_MAX) return 0; int this_rate_tokenonly = rd_stats.rate; if (!xd->lossless[mbmi->segment_id] && block_signals_txsize(mbmi->bsize)) { // av1_pick_uniform_tx_size_type_yrd above includes the cost of the tx_size // in the tokenonly rate, but for intra blocks, tx_size is always coded // (prediction granularity), so we account for it in the full rate, // not the tokenonly rate. this_rate_tokenonly -= tx_size_cost(x, bsize, mbmi->tx_size); } const int this_rate = rd_stats.rate + intra_mode_info_cost_y(cpi, x, mbmi, bsize, bmode_costs[mbmi->mode], 0); const int64_t this_rd = RDCOST(x->rdmult, this_rate, rd_stats.dist); if (this_rd < *best_rd) { *best_mbmi = *mbmi; *best_rd = this_rd; *rate = this_rate; *rate_tokenonly = this_rate_tokenonly; *distortion = rd_stats.dist; *skippable = rd_stats.skip_txfm; av1_copy_array(ctx->blk_skip, x->txfm_search_info.blk_skip, ctx->num_4x4_blk); av1_copy_array(ctx->tx_type_map, xd->tx_type_map, ctx->num_4x4_blk); return 1; } return 0; } /*!\brief Search for the best filter_intra mode when coding inter frame. * * \ingroup intra_mode_search * \callergraph * This function loops through all filter_intra modes to find the best one. * * \remark Returns nothing, but updates the mbmi and rd_stats. */ static inline void handle_filter_intra_mode(const AV1_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bsize, const PICK_MODE_CONTEXT *ctx, RD_STATS *rd_stats_y, int mode_cost, int64_t best_rd, int64_t best_rd_so_far) { MACROBLOCKD *const xd = &x->e_mbd; MB_MODE_INFO *const mbmi = xd->mi[0]; assert(mbmi->mode == DC_PRED && av1_filter_intra_allowed_bsize(&cpi->common, bsize)); RD_STATS rd_stats_y_fi; int filter_intra_selected_flag = 0; TX_SIZE best_tx_size = mbmi->tx_size; FILTER_INTRA_MODE best_fi_mode = FILTER_DC_PRED; uint8_t best_blk_skip[MAX_MIB_SIZE * MAX_MIB_SIZE]; memcpy(best_blk_skip, x->txfm_search_info.blk_skip, sizeof(best_blk_skip[0]) * ctx->num_4x4_blk); uint8_t best_tx_type_map[MAX_MIB_SIZE * MAX_MIB_SIZE]; av1_copy_array(best_tx_type_map, xd->tx_type_map, ctx->num_4x4_blk); mbmi->filter_intra_mode_info.use_filter_intra = 1; for (FILTER_INTRA_MODE fi_mode = FILTER_DC_PRED; fi_mode < FILTER_INTRA_MODES; ++fi_mode) { mbmi->filter_intra_mode_info.filter_intra_mode = fi_mode; av1_pick_uniform_tx_size_type_yrd(cpi, x, &rd_stats_y_fi, bsize, best_rd); if (rd_stats_y_fi.rate == INT_MAX) continue; const int this_rate_tmp = rd_stats_y_fi.rate + intra_mode_info_cost_y(cpi, x, mbmi, bsize, mode_cost, 0); const int64_t this_rd_tmp = RDCOST(x->rdmult, this_rate_tmp, rd_stats_y_fi.dist); if (this_rd_tmp != INT64_MAX && this_rd_tmp / 2 > best_rd) { break; } if (this_rd_tmp < best_rd_so_far) { best_tx_size = mbmi->tx_size; av1_copy_array(best_tx_type_map, xd->tx_type_map, ctx->num_4x4_blk); memcpy(best_blk_skip, x->txfm_search_info.blk_skip, sizeof(best_blk_skip[0]) * ctx->num_4x4_blk); best_fi_mode = fi_mode; *rd_stats_y = rd_stats_y_fi; filter_intra_selected_flag = 1; best_rd_so_far = this_rd_tmp; } } mbmi->tx_size = best_tx_size; av1_copy_array(xd->tx_type_map, best_tx_type_map, ctx->num_4x4_blk); memcpy(x->txfm_search_info.blk_skip, best_blk_skip, sizeof(x->txfm_search_info.blk_skip[0]) * ctx->num_4x4_blk); if (filter_intra_selected_flag) { mbmi->filter_intra_mode_info.use_filter_intra = 1; mbmi->filter_intra_mode_info.filter_intra_mode = best_fi_mode; } else { mbmi->filter_intra_mode_info.use_filter_intra = 0; } } // Evaluate a given luma intra-mode in inter frames. int av1_handle_intra_y_mode(IntraModeSearchState *intra_search_state, const AV1_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bsize, unsigned int ref_frame_cost, const PICK_MODE_CONTEXT *ctx, RD_STATS *rd_stats_y, int64_t best_rd, int *mode_cost_y, int64_t *rd_y, int64_t *best_model_rd, int64_t top_intra_model_rd[]) { const AV1_COMMON *cm = &cpi->common; const INTRA_MODE_SPEED_FEATURES *const intra_sf = &cpi->sf.intra_sf; MACROBLOCKD *const xd = &x->e_mbd; MB_MODE_INFO *const mbmi = xd->mi[0]; assert(mbmi->ref_frame[0] == INTRA_FRAME); const PREDICTION_MODE mode = mbmi->mode; const ModeCosts *mode_costs = &x->mode_costs; const int mode_cost = mode_costs->mbmode_cost[size_group_lookup[bsize]][mode] + ref_frame_cost; const int skip_ctx = av1_get_skip_txfm_context(xd); int known_rate = mode_cost; const int intra_cost_penalty = av1_get_intra_cost_penalty( cm->quant_params.base_qindex, cm->quant_params.y_dc_delta_q, cm->seq_params->bit_depth); if (mode != DC_PRED && mode != PAETH_PRED) known_rate += intra_cost_penalty; known_rate += AOMMIN(mode_costs->skip_txfm_cost[skip_ctx][0], mode_costs->skip_txfm_cost[skip_ctx][1]); const int64_t known_rd = RDCOST(x->rdmult, known_rate, 0); if (known_rd > best_rd) { intra_search_state->skip_intra_modes = 1; return 0; } const int is_directional_mode = av1_is_directional_mode(mode); if (is_directional_mode && av1_use_angle_delta(bsize) && cpi->oxcf.intra_mode_cfg.enable_angle_delta) { if (intra_sf->intra_pruning_with_hog && !intra_search_state->dir_mode_skip_mask_ready) { const float thresh[4] = { -1.2f, 0.0f, 0.0f, 1.2f }; const int is_chroma = 0; prune_intra_mode_with_hog(x, bsize, cm->seq_params->sb_size, thresh[intra_sf->intra_pruning_with_hog - 1], intra_search_state->directional_mode_skip_mask, is_chroma); intra_search_state->dir_mode_skip_mask_ready = 1; } if (intra_search_state->directional_mode_skip_mask[mode]) return 0; } const TX_SIZE tx_size = AOMMIN(TX_32X32, max_txsize_lookup[bsize]); const int64_t this_model_rd = intra_model_rd(&cpi->common, x, 0, bsize, tx_size, /*use_hadamard=*/1); const int model_rd_index_for_pruning = get_model_rd_index_for_pruning(x, intra_sf); if (prune_intra_y_mode(this_model_rd, best_model_rd, top_intra_model_rd, intra_sf->top_intra_model_count_allowed, model_rd_index_for_pruning)) return 0; av1_init_rd_stats(rd_stats_y); av1_pick_uniform_tx_size_type_yrd(cpi, x, rd_stats_y, bsize, best_rd); // Pick filter intra modes. if (mode == DC_PRED && av1_filter_intra_allowed_bsize(cm, bsize)) { int try_filter_intra = 1; int64_t best_rd_so_far = INT64_MAX; if (rd_stats_y->rate != INT_MAX) { // best_rd_so_far is the rdcost of DC_PRED without using filter_intra. // Later, in filter intra search, best_rd_so_far is used for comparison. mbmi->filter_intra_mode_info.use_filter_intra = 0; const int tmp_rate = rd_stats_y->rate + intra_mode_info_cost_y(cpi, x, mbmi, bsize, mode_cost, 0); best_rd_so_far = RDCOST(x->rdmult, tmp_rate, rd_stats_y->dist); try_filter_intra = (best_rd_so_far / 2) <= best_rd; } else if (intra_sf->skip_filter_intra_in_inter_frames >= 1) { // As rd cost of luma intra dc mode is more than best_rd (i.e., // rd_stats_y->rate = INT_MAX), skip the evaluation of filter intra modes. try_filter_intra = 0; } if (try_filter_intra) { handle_filter_intra_mode(cpi, x, bsize, ctx, rd_stats_y, mode_cost, best_rd, best_rd_so_far); } } if (rd_stats_y->rate == INT_MAX) return 0; *mode_cost_y = intra_mode_info_cost_y(cpi, x, mbmi, bsize, mode_cost, 0); const int rate_y = rd_stats_y->skip_txfm ? mode_costs->skip_txfm_cost[skip_ctx][1] : rd_stats_y->rate; *rd_y = RDCOST(x->rdmult, rate_y + *mode_cost_y, rd_stats_y->dist); if (best_rd < (INT64_MAX / 2) && *rd_y > (best_rd + (best_rd >> 2))) { intra_search_state->skip_intra_modes = 1; return 0; } return 1; } int av1_search_intra_uv_modes_in_interframe( IntraModeSearchState *intra_search_state, const AV1_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bsize, RD_STATS *rd_stats, const RD_STATS *rd_stats_y, RD_STATS *rd_stats_uv, int64_t best_rd) { const AV1_COMMON *cm = &cpi->common; MACROBLOCKD *const xd = &x->e_mbd; MB_MODE_INFO *const mbmi = xd->mi[0]; assert(mbmi->ref_frame[0] == INTRA_FRAME); // TODO(chiyotsai@google.com): Consolidate the chroma search code here with // the one in av1_search_palette_mode. PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info; const int try_palette = cpi->oxcf.tool_cfg.enable_palette && av1_allow_palette(cm->features.allow_screen_content_tools, mbmi->bsize); assert(intra_search_state->rate_uv_intra == INT_MAX); if (intra_search_state->rate_uv_intra == INT_MAX) { // If no good uv-predictor had been found, search for it. const TX_SIZE uv_tx = av1_get_tx_size(AOM_PLANE_U, xd); av1_rd_pick_intra_sbuv_mode(cpi, x, &intra_search_state->rate_uv_intra, &intra_search_state->rate_uv_tokenonly, &intra_search_state->dist_uvs, &intra_search_state->skip_uvs, bsize, uv_tx); intra_search_state->mode_uv = mbmi->uv_mode; if (try_palette) intra_search_state->pmi_uv = *pmi; intra_search_state->uv_angle_delta = mbmi->angle_delta[PLANE_TYPE_UV]; const int uv_rate = intra_search_state->rate_uv_tokenonly; const int64_t uv_dist = intra_search_state->dist_uvs; const int64_t uv_rd = RDCOST(x->rdmult, uv_rate, uv_dist); if (uv_rd > best_rd) { // If there is no good intra uv-mode available, we can skip all intra // modes. intra_search_state->skip_intra_modes = 1; return 0; } } // If we are here, then the encoder has found at least one good intra uv // predictor, so we can directly copy its statistics over. // TODO(any): the stats here is not right if the best uv mode is CFL but the // best y mode is palette. rd_stats_uv->rate = intra_search_state->rate_uv_tokenonly; rd_stats_uv->dist = intra_search_state->dist_uvs; rd_stats_uv->skip_txfm = intra_search_state->skip_uvs; rd_stats->skip_txfm = rd_stats_y->skip_txfm && rd_stats_uv->skip_txfm; mbmi->uv_mode = intra_search_state->mode_uv; if (try_palette) { pmi->palette_size[1] = intra_search_state->pmi_uv.palette_size[1]; memcpy(pmi->palette_colors + PALETTE_MAX_SIZE, intra_search_state->pmi_uv.palette_colors + PALETTE_MAX_SIZE, 2 * PALETTE_MAX_SIZE * sizeof(pmi->palette_colors[0])); } mbmi->angle_delta[PLANE_TYPE_UV] = intra_search_state->uv_angle_delta; return 1; } // Checks if odd delta angles can be pruned based on rdcosts of even delta // angles of the corresponding directional mode. static inline int prune_luma_odd_delta_angles_using_rd_cost( const MB_MODE_INFO *const mbmi, const int64_t *const intra_modes_rd_cost, int64_t best_rd, int prune_luma_odd_delta_angles_in_intra) { const int luma_delta_angle = mbmi->angle_delta[PLANE_TYPE_Y]; if (!prune_luma_odd_delta_angles_in_intra || !av1_is_directional_mode(mbmi->mode) || !(abs(luma_delta_angle) & 1) || best_rd == INT64_MAX) return 0; const int64_t rd_thresh = best_rd + (best_rd >> 3); // Neighbour rdcosts are considered for pruning of odd delta angles as // mentioned below: // Delta angle Delta angle rdcost // to be pruned to be considered // -3 -2 // -1 -2, 0 // 1 0, 2 // 3 2 return intra_modes_rd_cost[luma_delta_angle + MAX_ANGLE_DELTA] > rd_thresh && intra_modes_rd_cost[luma_delta_angle + MAX_ANGLE_DELTA + 2] > rd_thresh; } // Finds the best non-intrabc mode on an intra frame. int64_t av1_rd_pick_intra_sby_mode(const AV1_COMP *const cpi, MACROBLOCK *x, int *rate, int *rate_tokenonly, int64_t *distortion, uint8_t *skippable, BLOCK_SIZE bsize, int64_t best_rd, PICK_MODE_CONTEXT *ctx) { MACROBLOCKD *const xd = &x->e_mbd; MB_MODE_INFO *const mbmi = xd->mi[0]; assert(!is_inter_block(mbmi)); int64_t best_model_rd = INT64_MAX; int is_directional_mode; uint8_t directional_mode_skip_mask[INTRA_MODES] = { 0 }; // Flag to check rd of any intra mode is better than best_rd passed to this // function int beat_best_rd = 0; const int *bmode_costs; const IntraModeCfg *const intra_mode_cfg = &cpi->oxcf.intra_mode_cfg; PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info; const int try_palette = cpi->oxcf.tool_cfg.enable_palette && av1_allow_palette(cpi->common.features.allow_screen_content_tools, mbmi->bsize); uint8_t *best_palette_color_map = try_palette ? x->palette_buffer->best_palette_color_map : NULL; const MB_MODE_INFO *above_mi = xd->above_mbmi; const MB_MODE_INFO *left_mi = xd->left_mbmi; const PREDICTION_MODE A = av1_above_block_mode(above_mi); const PREDICTION_MODE L = av1_left_block_mode(left_mi); const int above_ctx = intra_mode_context[A]; const int left_ctx = intra_mode_context[L]; bmode_costs = x->mode_costs.y_mode_costs[above_ctx][left_ctx]; mbmi->angle_delta[PLANE_TYPE_Y] = 0; const INTRA_MODE_SPEED_FEATURES *const intra_sf = &cpi->sf.intra_sf; if (intra_sf->intra_pruning_with_hog) { // Less aggressive thresholds are used here than those used in inter frame // encoding in av1_handle_intra_y_mode() because we want key frames/intra // frames to have higher quality. const float thresh[4] = { -1.2f, -1.2f, -0.6f, 0.4f }; const int is_chroma = 0; prune_intra_mode_with_hog(x, bsize, cpi->common.seq_params->sb_size, thresh[intra_sf->intra_pruning_with_hog - 1], directional_mode_skip_mask, is_chroma); } mbmi->filter_intra_mode_info.use_filter_intra = 0; pmi->palette_size[0] = 0; // Set params for mode evaluation set_mode_eval_params(cpi, x, MODE_EVAL); MB_MODE_INFO best_mbmi = *mbmi; const int max_winner_mode_count = winner_mode_count_allowed[cpi->sf.winner_mode_sf.multi_winner_mode_type]; zero_winner_mode_stats(bsize, max_winner_mode_count, x->winner_mode_stats); x->winner_mode_count = 0; // Searches the intra-modes except for intrabc, palette, and filter_intra. int64_t top_intra_model_rd[TOP_INTRA_MODEL_COUNT]; for (int i = 0; i < TOP_INTRA_MODEL_COUNT; i++) { top_intra_model_rd[i] = INT64_MAX; } // Initialize the rdcost corresponding to all the directional and // non-directional intra modes. // 1. For directional modes, it stores the rdcost values for delta angles -4, // -3, ..., 3, 4. // 2. The rdcost value for luma_delta_angle is stored at index // luma_delta_angle + MAX_ANGLE_DELTA + 1. // 3. The rdcost values for fictitious/nonexistent luma_delta_angle -4 and 4 // (array indices 0 and 8) are always set to INT64_MAX (the initial value). int64_t intra_modes_rd_cost[INTRA_MODE_END] [SIZE_OF_ANGLE_DELTA_RD_COST_ARRAY]; for (int i = 0; i < INTRA_MODE_END; i++) { for (int j = 0; j < SIZE_OF_ANGLE_DELTA_RD_COST_ARRAY; j++) { intra_modes_rd_cost[i][j] = INT64_MAX; } } for (int mode_idx = INTRA_MODE_START; mode_idx < LUMA_MODE_COUNT; ++mode_idx) { set_y_mode_and_delta_angle(mode_idx, mbmi, intra_sf->prune_luma_odd_delta_angles_in_intra); RD_STATS this_rd_stats; int this_rate, this_rate_tokenonly, s; int is_diagonal_mode; int64_t this_distortion, this_rd; const int luma_delta_angle = mbmi->angle_delta[PLANE_TYPE_Y]; is_diagonal_mode = av1_is_diagonal_mode(mbmi->mode); if (is_diagonal_mode && !intra_mode_cfg->enable_diagonal_intra) continue; if (av1_is_directional_mode(mbmi->mode) && !intra_mode_cfg->enable_directional_intra) continue; // The smooth prediction mode appears to be more frequently picked // than horizontal / vertical smooth prediction modes. Hence treat // them differently in speed features. if ((!intra_mode_cfg->enable_smooth_intra || intra_sf->disable_smooth_intra) && (mbmi->mode == SMOOTH_H_PRED || mbmi->mode == SMOOTH_V_PRED)) continue; if (!intra_mode_cfg->enable_smooth_intra && mbmi->mode == SMOOTH_PRED) continue; // The functionality of filter intra modes and smooth prediction // overlap. Hence smooth prediction is pruned only if all the // filter intra modes are enabled. if (intra_sf->disable_smooth_intra && intra_sf->prune_filter_intra_level == 0 && mbmi->mode == SMOOTH_PRED) continue; if (!intra_mode_cfg->enable_paeth_intra && mbmi->mode == PAETH_PRED) continue; // Skip the evaluation of modes that do not match with the winner mode in // x->mb_mode_cache. if (x->use_mb_mode_cache && mbmi->mode != x->mb_mode_cache->mode) continue; is_directional_mode = av1_is_directional_mode(mbmi->mode); if (is_directional_mode && directional_mode_skip_mask[mbmi->mode]) continue; if (is_directional_mode && !(av1_use_angle_delta(bsize) && intra_mode_cfg->enable_angle_delta) && luma_delta_angle != 0) continue; // Use intra_y_mode_mask speed feature to skip intra mode evaluation. if (!(intra_sf->intra_y_mode_mask[max_txsize_lookup[bsize]] & (1 << mbmi->mode))) continue; if (prune_luma_odd_delta_angles_using_rd_cost( mbmi, intra_modes_rd_cost[mbmi->mode], best_rd, intra_sf->prune_luma_odd_delta_angles_in_intra)) continue; const TX_SIZE tx_size = AOMMIN(TX_32X32, max_txsize_lookup[bsize]); const int64_t this_model_rd = intra_model_rd(&cpi->common, x, 0, bsize, tx_size, /*use_hadamard=*/1); const int model_rd_index_for_pruning = get_model_rd_index_for_pruning(x, intra_sf); if (prune_intra_y_mode(this_model_rd, &best_model_rd, top_intra_model_rd, intra_sf->top_intra_model_count_allowed, model_rd_index_for_pruning)) continue; // Builds the actual prediction. The prediction from // model_intra_yrd_and_prune was just an estimation that did not take into // account the effect of txfm pipeline, so we need to redo it for real // here. av1_pick_uniform_tx_size_type_yrd(cpi, x, &this_rd_stats, bsize, best_rd); this_rate_tokenonly = this_rd_stats.rate; this_distortion = this_rd_stats.dist; s = this_rd_stats.skip_txfm; if (this_rate_tokenonly == INT_MAX) continue; if (!xd->lossless[mbmi->segment_id] && block_signals_txsize(mbmi->bsize)) { // av1_pick_uniform_tx_size_type_yrd above includes the cost of the // tx_size in the tokenonly rate, but for intra blocks, tx_size is always // coded (prediction granularity), so we account for it in the full rate, // not the tokenonly rate. this_rate_tokenonly -= tx_size_cost(x, bsize, mbmi->tx_size); } this_rate = this_rd_stats.rate + intra_mode_info_cost_y(cpi, x, mbmi, bsize, bmode_costs[mbmi->mode], 0); this_rd = RDCOST(x->rdmult, this_rate, this_distortion); // Visual quality adjustment based on recon vs source variance. if ((cpi->oxcf.mode == ALLINTRA) && (this_rd != INT64_MAX)) { this_rd = (int64_t)(this_rd * intra_rd_variance_factor(cpi, x, bsize)); } intra_modes_rd_cost[mbmi->mode][luma_delta_angle + MAX_ANGLE_DELTA + 1] = this_rd; // Collect mode stats for multiwinner mode processing const int txfm_search_done = 1; store_winner_mode_stats( &cpi->common, x, mbmi, NULL, NULL, NULL, 0, NULL, bsize, this_rd, cpi->sf.winner_mode_sf.multi_winner_mode_type, txfm_search_done); if (this_rd < best_rd) { best_mbmi = *mbmi; best_rd = this_rd; // Setting beat_best_rd flag because current mode rd is better than // best_rd passed to this function beat_best_rd = 1; *rate = this_rate; *rate_tokenonly = this_rate_tokenonly; *distortion = this_distortion; *skippable = s; memcpy(ctx->blk_skip, x->txfm_search_info.blk_skip, sizeof(x->txfm_search_info.blk_skip[0]) * ctx->num_4x4_blk); av1_copy_array(ctx->tx_type_map, xd->tx_type_map, ctx->num_4x4_blk); } } // Searches palette if (try_palette) { av1_rd_pick_palette_intra_sby( cpi, x, bsize, bmode_costs[DC_PRED], &best_mbmi, best_palette_color_map, &best_rd, rate, rate_tokenonly, distortion, skippable, &beat_best_rd, ctx, ctx->blk_skip, ctx->tx_type_map); } // Searches filter_intra if (beat_best_rd && av1_filter_intra_allowed_bsize(&cpi->common, bsize)) { if (rd_pick_filter_intra_sby(cpi, x, rate, rate_tokenonly, distortion, skippable, bsize, bmode_costs[DC_PRED], best_mbmi.mode, &best_rd, &best_model_rd, ctx)) { best_mbmi = *mbmi; } } // No mode is identified with less rd value than best_rd passed to this // function. In such cases winner mode processing is not necessary and return // best_rd as INT64_MAX to indicate best mode is not identified if (!beat_best_rd) return INT64_MAX; // In multi-winner mode processing, perform tx search for few best modes // identified during mode evaluation. Winner mode processing uses best tx // configuration for tx search. if (cpi->sf.winner_mode_sf.multi_winner_mode_type) { int best_mode_idx = 0; int block_width, block_height; uint8_t *color_map_dst = xd->plane[PLANE_TYPE_Y].color_index_map; av1_get_block_dimensions(bsize, AOM_PLANE_Y, xd, &block_width, &block_height, NULL, NULL); for (int mode_idx = 0; mode_idx < x->winner_mode_count; mode_idx++) { *mbmi = x->winner_mode_stats[mode_idx].mbmi; if (is_winner_mode_processing_enabled(cpi, x, mbmi, 0)) { // Restore color_map of palette mode before winner mode processing if (mbmi->palette_mode_info.palette_size[0] > 0) { uint8_t *color_map_src = x->winner_mode_stats[mode_idx].color_index_map; memcpy(color_map_dst, color_map_src, block_width * block_height * sizeof(*color_map_src)); } // Set params for winner mode evaluation set_mode_eval_params(cpi, x, WINNER_MODE_EVAL); // Winner mode processing // If previous searches use only the default tx type/no R-D optimization // of quantized coeffs, do an extra search for the best tx type/better // R-D optimization of quantized coeffs if (intra_block_yrd(cpi, x, bsize, bmode_costs, &best_rd, rate, rate_tokenonly, distortion, skippable, &best_mbmi, ctx)) best_mode_idx = mode_idx; } } // Copy color_map of palette mode for final winner mode if (best_mbmi.palette_mode_info.palette_size[0] > 0) { uint8_t *color_map_src = x->winner_mode_stats[best_mode_idx].color_index_map; memcpy(color_map_dst, color_map_src, block_width * block_height * sizeof(*color_map_src)); } } else { // If previous searches use only the default tx type/no R-D optimization of // quantized coeffs, do an extra search for the best tx type/better R-D // optimization of quantized coeffs if (is_winner_mode_processing_enabled(cpi, x, mbmi, 0)) { // Set params for winner mode evaluation set_mode_eval_params(cpi, x, WINNER_MODE_EVAL); *mbmi = best_mbmi; intra_block_yrd(cpi, x, bsize, bmode_costs, &best_rd, rate, rate_tokenonly, distortion, skippable, &best_mbmi, ctx); } } *mbmi = best_mbmi; av1_copy_array(xd->tx_type_map, ctx->tx_type_map, ctx->num_4x4_blk); return best_rd; }