| /* |
| * Copyright (c) 2016, 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 <stdio.h> |
| #include <string.h> |
| |
| #include "aom_mem/aom_mem.h" |
| |
| #include "av1/common/entropy.h" |
| #include "av1/common/pred_common.h" |
| #include "av1/common/scan.h" |
| #include "av1/common/seg_common.h" |
| |
| #include "av1/encoder/cost.h" |
| #include "av1/encoder/encoder.h" |
| #include "av1/encoder/encodetxb.h" |
| #include "av1/encoder/rdopt.h" |
| #include "av1/encoder/tokenize.h" |
| |
| static AOM_INLINE int av1_fast_palette_color_index_context_on_edge( |
| const uint8_t *color_map, int stride, int r, int c, int *color_idx) { |
| const bool has_left = (c - 1 >= 0); |
| const bool has_above = (r - 1 >= 0); |
| assert(r > 0 || c > 0); |
| assert(has_above ^ has_left); |
| assert(color_idx); |
| (void)has_left; |
| |
| const uint8_t color_neighbor = has_above |
| ? color_map[(r - 1) * stride + (c - 0)] |
| : color_map[(r - 0) * stride + (c - 1)]; |
| // If the neighbor color has higher index than current color index, then we |
| // move up by 1. |
| const uint8_t current_color = *color_idx = color_map[r * stride + c]; |
| if (color_neighbor > current_color) { |
| (*color_idx)++; |
| } else if (color_neighbor == current_color) { |
| *color_idx = 0; |
| } |
| |
| // Get hash value of context. |
| // The non-diagonal neighbors get a weight of 2. |
| const uint8_t color_score = 2; |
| const uint8_t hash_multiplier = 1; |
| const uint8_t color_index_ctx_hash = color_score * hash_multiplier; |
| |
| // Lookup context from hash. |
| const int color_index_ctx = |
| av1_palette_color_index_context_lookup[color_index_ctx_hash]; |
| assert(color_index_ctx == 0); |
| (void)color_index_ctx; |
| return 0; |
| } |
| |
| #define SWAP(i, j) \ |
| do { \ |
| const uint8_t tmp_score = score_rank[i]; \ |
| const uint8_t tmp_color = color_rank[i]; \ |
| score_rank[i] = score_rank[j]; \ |
| color_rank[i] = color_rank[j]; \ |
| score_rank[j] = tmp_score; \ |
| color_rank[j] = tmp_color; \ |
| } while (0) |
| #define INVALID_COLOR_IDX (UINT8_MAX) |
| |
| // A faster version of av1_get_palette_color_index_context used by the encoder |
| // exploiting the fact that the encoder does not need to maintain a color order. |
| static AOM_INLINE int av1_fast_palette_color_index_context( |
| const uint8_t *color_map, int stride, int r, int c, int *color_idx) { |
| assert(r > 0 || c > 0); |
| |
| const bool has_above = (r - 1 >= 0); |
| const bool has_left = (c - 1 >= 0); |
| assert(has_above || has_left); |
| if (has_above ^ has_left) { |
| return av1_fast_palette_color_index_context_on_edge(color_map, stride, r, c, |
| color_idx); |
| } |
| |
| // This goes in the order of left, top, and top-left. This has the advantage |
| // that unless anything here are not distinct or invalid, this will already |
| // be in sorted order. Furthermore, if either of the first two is |
| // invalid, we know the last one is also invalid. |
| uint8_t color_neighbors[NUM_PALETTE_NEIGHBORS]; |
| color_neighbors[0] = color_map[(r - 0) * stride + (c - 1)]; |
| color_neighbors[1] = color_map[(r - 1) * stride + (c - 0)]; |
| color_neighbors[2] = color_map[(r - 1) * stride + (c - 1)]; |
| |
| // Aggregate duplicated values. |
| // Since our array is so small, using a couple if statements is faster |
| uint8_t scores[NUM_PALETTE_NEIGHBORS] = { 2, 2, 1 }; |
| uint8_t num_invalid_colors = 0; |
| if (color_neighbors[0] == color_neighbors[1]) { |
| scores[0] += scores[1]; |
| color_neighbors[1] = INVALID_COLOR_IDX; |
| num_invalid_colors += 1; |
| |
| if (color_neighbors[0] == color_neighbors[2]) { |
| scores[0] += scores[2]; |
| num_invalid_colors += 1; |
| } |
| } else if (color_neighbors[0] == color_neighbors[2]) { |
| scores[0] += scores[2]; |
| num_invalid_colors += 1; |
| } else if (color_neighbors[1] == color_neighbors[2]) { |
| scores[1] += scores[2]; |
| num_invalid_colors += 1; |
| } |
| |
| const uint8_t num_valid_colors = NUM_PALETTE_NEIGHBORS - num_invalid_colors; |
| |
| uint8_t *color_rank = color_neighbors; |
| uint8_t *score_rank = scores; |
| |
| // Sort everything |
| if (num_valid_colors > 1) { |
| if (color_neighbors[1] == INVALID_COLOR_IDX) { |
| scores[1] = scores[2]; |
| color_neighbors[1] = color_neighbors[2]; |
| } |
| |
| // We need to swap the first two elements if they have the same score but |
| // the color indices are not in the right order |
| if (score_rank[0] < score_rank[1] || |
| (score_rank[0] == score_rank[1] && color_rank[0] > color_rank[1])) { |
| SWAP(0, 1); |
| } |
| if (num_valid_colors > 2) { |
| if (score_rank[0] < score_rank[2]) { |
| SWAP(0, 2); |
| } |
| if (score_rank[1] < score_rank[2]) { |
| SWAP(1, 2); |
| } |
| } |
| } |
| |
| // If any of the neighbor colors has higher index than current color index, |
| // then we move up by 1 unless the current color is the same as one of the |
| // neighbors. |
| const uint8_t current_color = *color_idx = color_map[r * stride + c]; |
| for (int idx = 0; idx < num_valid_colors; idx++) { |
| if (color_rank[idx] > current_color) { |
| (*color_idx)++; |
| } else if (color_rank[idx] == current_color) { |
| *color_idx = idx; |
| break; |
| } |
| } |
| |
| // Get hash value of context. |
| uint8_t color_index_ctx_hash = 0; |
| static const uint8_t hash_multipliers[NUM_PALETTE_NEIGHBORS] = { 1, 2, 2 }; |
| for (int idx = 0; idx < num_valid_colors; ++idx) { |
| color_index_ctx_hash += score_rank[idx] * hash_multipliers[idx]; |
| } |
| assert(color_index_ctx_hash > 0); |
| assert(color_index_ctx_hash <= MAX_COLOR_CONTEXT_HASH); |
| |
| // Lookup context from hash. |
| const int color_index_ctx = 9 - color_index_ctx_hash; |
| assert(color_index_ctx == |
| av1_palette_color_index_context_lookup[color_index_ctx_hash]); |
| assert(color_index_ctx >= 0); |
| assert(color_index_ctx < PALETTE_COLOR_INDEX_CONTEXTS); |
| return color_index_ctx; |
| } |
| #undef INVALID_COLOR_IDX |
| #undef SWAP |
| |
| static int cost_and_tokenize_map(Av1ColorMapParam *param, TokenExtra **t, |
| int plane, int calc_rate, int allow_update_cdf, |
| FRAME_COUNTS *counts) { |
| const uint8_t *const color_map = param->color_map; |
| MapCdf map_cdf = param->map_cdf; |
| ColorCost color_cost = param->color_cost; |
| const int plane_block_width = param->plane_width; |
| const int rows = param->rows; |
| const int cols = param->cols; |
| const int n = param->n_colors; |
| const int palette_size_idx = n - PALETTE_MIN_SIZE; |
| int this_rate = 0; |
| |
| (void)plane; |
| (void)counts; |
| |
| for (int k = 1; k < rows + cols - 1; ++k) { |
| for (int j = AOMMIN(k, cols - 1); j >= AOMMAX(0, k - rows + 1); --j) { |
| int i = k - j; |
| int color_new_idx; |
| const int color_ctx = av1_fast_palette_color_index_context( |
| color_map, plane_block_width, i, j, &color_new_idx); |
| assert(color_new_idx >= 0 && color_new_idx < n); |
| if (calc_rate) { |
| this_rate += color_cost[palette_size_idx][color_ctx][color_new_idx]; |
| } else { |
| (*t)->token = color_new_idx; |
| (*t)->color_ctx = color_ctx; |
| ++(*t); |
| if (allow_update_cdf) |
| update_cdf(map_cdf[palette_size_idx][color_ctx], color_new_idx, n); |
| #if CONFIG_ENTROPY_STATS |
| if (plane) { |
| ++counts->palette_uv_color_index[palette_size_idx][color_ctx] |
| [color_new_idx]; |
| } else { |
| ++counts->palette_y_color_index[palette_size_idx][color_ctx] |
| [color_new_idx]; |
| } |
| #endif |
| } |
| } |
| } |
| if (calc_rate) return this_rate; |
| return 0; |
| } |
| |
| static void get_palette_params(const MACROBLOCK *const x, int plane, |
| BLOCK_SIZE bsize, Av1ColorMapParam *params) { |
| const MACROBLOCKD *const xd = &x->e_mbd; |
| const MB_MODE_INFO *const mbmi = xd->mi[0]; |
| const PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info; |
| params->color_map = xd->plane[plane].color_index_map; |
| params->map_cdf = plane ? xd->tile_ctx->palette_uv_color_index_cdf |
| : xd->tile_ctx->palette_y_color_index_cdf; |
| params->color_cost = plane ? x->mode_costs.palette_uv_color_cost |
| : x->mode_costs.palette_y_color_cost; |
| params->n_colors = pmi->palette_size[plane]; |
| av1_get_block_dimensions(bsize, plane, xd, ¶ms->plane_width, NULL, |
| ¶ms->rows, ¶ms->cols); |
| } |
| |
| // TODO(any): Remove this function |
| static void get_color_map_params(const MACROBLOCK *const x, int plane, |
| BLOCK_SIZE bsize, TX_SIZE tx_size, |
| COLOR_MAP_TYPE type, |
| Av1ColorMapParam *params) { |
| (void)tx_size; |
| memset(params, 0, sizeof(*params)); |
| switch (type) { |
| case PALETTE_MAP: get_palette_params(x, plane, bsize, params); break; |
| default: assert(0 && "Invalid color map type"); return; |
| } |
| } |
| |
| int av1_cost_color_map(const MACROBLOCK *const x, int plane, BLOCK_SIZE bsize, |
| TX_SIZE tx_size, COLOR_MAP_TYPE type) { |
| assert(plane == 0 || plane == 1); |
| Av1ColorMapParam color_map_params; |
| get_color_map_params(x, plane, bsize, tx_size, type, &color_map_params); |
| return cost_and_tokenize_map(&color_map_params, NULL, plane, 1, 0, NULL); |
| } |
| |
| void av1_tokenize_color_map(const MACROBLOCK *const x, int plane, |
| TokenExtra **t, BLOCK_SIZE bsize, TX_SIZE tx_size, |
| COLOR_MAP_TYPE type, int allow_update_cdf, |
| FRAME_COUNTS *counts) { |
| assert(plane == 0 || plane == 1); |
| Av1ColorMapParam color_map_params; |
| get_color_map_params(x, plane, bsize, tx_size, type, &color_map_params); |
| // The first color index does not use context or entropy. |
| (*t)->token = color_map_params.color_map[0]; |
| (*t)->color_ctx = -1; |
| ++(*t); |
| cost_and_tokenize_map(&color_map_params, t, plane, 0, allow_update_cdf, |
| counts); |
| } |
| |
| static void tokenize_vartx(ThreadData *td, TX_SIZE tx_size, |
| BLOCK_SIZE plane_bsize, int blk_row, int blk_col, |
| int block, int plane, void *arg) { |
| MACROBLOCK *const x = &td->mb; |
| MACROBLOCKD *const xd = &x->e_mbd; |
| MB_MODE_INFO *const mbmi = xd->mi[0]; |
| const struct macroblockd_plane *const pd = &xd->plane[plane]; |
| const int max_blocks_high = max_block_high(xd, plane_bsize, plane); |
| const int max_blocks_wide = max_block_wide(xd, plane_bsize, plane); |
| |
| if (blk_row >= max_blocks_high || blk_col >= max_blocks_wide) return; |
| |
| const TX_SIZE plane_tx_size = |
| plane ? av1_get_max_uv_txsize(mbmi->bsize, pd->subsampling_x, |
| pd->subsampling_y) |
| : mbmi->inter_tx_size[av1_get_txb_size_index(plane_bsize, blk_row, |
| blk_col)]; |
| |
| if (tx_size == plane_tx_size || plane) { |
| plane_bsize = |
| get_plane_block_size(mbmi->bsize, pd->subsampling_x, pd->subsampling_y); |
| |
| struct tokenize_b_args *args = arg; |
| if (args->allow_update_cdf) |
| av1_update_and_record_txb_context(plane, block, blk_row, blk_col, |
| plane_bsize, tx_size, arg); |
| else |
| av1_record_txb_context(plane, block, blk_row, blk_col, plane_bsize, |
| tx_size, arg); |
| |
| } else { |
| // Half the block size in transform block unit. |
| const TX_SIZE sub_txs = sub_tx_size_map[tx_size]; |
| const int bsw = tx_size_wide_unit[sub_txs]; |
| const int bsh = tx_size_high_unit[sub_txs]; |
| const int step = bsw * bsh; |
| const int row_end = |
| AOMMIN(tx_size_high_unit[tx_size], max_blocks_high - blk_row); |
| const int col_end = |
| AOMMIN(tx_size_wide_unit[tx_size], max_blocks_wide - blk_col); |
| |
| assert(bsw > 0 && bsh > 0); |
| |
| for (int row = 0; row < row_end; row += bsh) { |
| const int offsetr = blk_row + row; |
| for (int col = 0; col < col_end; col += bsw) { |
| const int offsetc = blk_col + col; |
| |
| tokenize_vartx(td, sub_txs, plane_bsize, offsetr, offsetc, block, plane, |
| arg); |
| block += step; |
| } |
| } |
| } |
| } |
| |
| void av1_tokenize_sb_vartx(const AV1_COMP *cpi, ThreadData *td, |
| RUN_TYPE dry_run, BLOCK_SIZE bsize, int *rate, |
| uint8_t allow_update_cdf) { |
| assert(bsize < BLOCK_SIZES_ALL); |
| const AV1_COMMON *const cm = &cpi->common; |
| MACROBLOCK *const x = &td->mb; |
| MACROBLOCKD *const xd = &x->e_mbd; |
| const int mi_row = xd->mi_row; |
| const int mi_col = xd->mi_col; |
| if (mi_row >= cm->mi_params.mi_rows || mi_col >= cm->mi_params.mi_cols) |
| return; |
| |
| const int num_planes = av1_num_planes(cm); |
| MB_MODE_INFO *const mbmi = xd->mi[0]; |
| struct tokenize_b_args arg = { cpi, td, 0, allow_update_cdf, dry_run }; |
| |
| if (mbmi->skip_txfm) { |
| av1_reset_entropy_context(xd, bsize, num_planes); |
| return; |
| } |
| |
| for (int plane = 0; plane < num_planes; ++plane) { |
| if (plane && !xd->is_chroma_ref) break; |
| const struct macroblockd_plane *const pd = &xd->plane[plane]; |
| const int ss_x = pd->subsampling_x; |
| const int ss_y = pd->subsampling_y; |
| const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, ss_x, ss_y); |
| assert(plane_bsize < BLOCK_SIZES_ALL); |
| const int mi_width = mi_size_wide[plane_bsize]; |
| const int mi_height = mi_size_high[plane_bsize]; |
| const TX_SIZE max_tx_size = get_vartx_max_txsize(xd, plane_bsize, plane); |
| const BLOCK_SIZE txb_size = txsize_to_bsize[max_tx_size]; |
| const int bw = mi_size_wide[txb_size]; |
| const int bh = mi_size_high[txb_size]; |
| int block = 0; |
| const int step = |
| tx_size_wide_unit[max_tx_size] * tx_size_high_unit[max_tx_size]; |
| |
| const BLOCK_SIZE max_unit_bsize = |
| get_plane_block_size(BLOCK_64X64, ss_x, ss_y); |
| int mu_blocks_wide = mi_size_wide[max_unit_bsize]; |
| int mu_blocks_high = mi_size_high[max_unit_bsize]; |
| |
| mu_blocks_wide = AOMMIN(mi_width, mu_blocks_wide); |
| mu_blocks_high = AOMMIN(mi_height, mu_blocks_high); |
| |
| for (int idy = 0; idy < mi_height; idy += mu_blocks_high) { |
| for (int idx = 0; idx < mi_width; idx += mu_blocks_wide) { |
| const int unit_height = AOMMIN(mu_blocks_high + idy, mi_height); |
| const int unit_width = AOMMIN(mu_blocks_wide + idx, mi_width); |
| for (int blk_row = idy; blk_row < unit_height; blk_row += bh) { |
| for (int blk_col = idx; blk_col < unit_width; blk_col += bw) { |
| tokenize_vartx(td, max_tx_size, plane_bsize, blk_row, blk_col, |
| block, plane, &arg); |
| block += step; |
| } |
| } |
| } |
| } |
| } |
| if (rate) *rate += arg.this_rate; |
| } |
