| |
| /* |
| * Copyright (c) 2012 The WebM project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include <limits.h> |
| |
| #include "vp9/common/vp9_common.h" |
| #include "vp9/common/vp9_pred_common.h" |
| #include "vp9/common/vp9_seg_common.h" |
| #include "vp9/common/vp9_treecoder.h" |
| |
| static INLINE const MB_MODE_INFO *get_above_mbmi(const MODE_INFO *const above) { |
| return (above != NULL) ? &above->mbmi : NULL; |
| } |
| |
| static INLINE const MB_MODE_INFO *get_left_mbmi(const MODE_INFO *const left) { |
| return (left != NULL) ? &left->mbmi : NULL; |
| } |
| |
| // Returns a context number for the given MB prediction signal |
| unsigned char vp9_get_pred_context_switchable_interp(const MACROBLOCKD *xd) { |
| const MODE_INFO *const above_mi = get_above_mi(xd); |
| const MODE_INFO *const left_mi = get_left_mi(xd); |
| const int above_in_image = above_mi != NULL; |
| const int left_in_image = left_mi != NULL; |
| // Note: |
| // The mode info data structure has a one element border above and to the |
| // left of the entries correpsonding to real macroblocks. |
| // The prediction flags in these dummy entries are initialised to 0. |
| // left |
| const int left_mv_pred = left_in_image ? is_inter_block(&left_mi->mbmi) |
| : 0; |
| const int left_interp = left_in_image && left_mv_pred |
| ? left_mi->mbmi.interp_filter |
| : SWITCHABLE_FILTERS; |
| |
| // above |
| const int above_mv_pred = above_in_image ? is_inter_block(&above_mi->mbmi) |
| : 0; |
| const int above_interp = above_in_image && above_mv_pred |
| ? above_mi->mbmi.interp_filter |
| : SWITCHABLE_FILTERS; |
| |
| if (left_interp == above_interp) |
| return left_interp; |
| else if (left_interp == SWITCHABLE_FILTERS && |
| above_interp != SWITCHABLE_FILTERS) |
| return above_interp; |
| else if (left_interp != SWITCHABLE_FILTERS && |
| above_interp == SWITCHABLE_FILTERS) |
| return left_interp; |
| else |
| return SWITCHABLE_FILTERS; |
| } |
| // Returns a context number for the given MB prediction signal |
| int vp9_get_intra_inter_context(const MACROBLOCKD *xd) { |
| const MB_MODE_INFO *const above_mbmi = get_above_mbmi(get_above_mi(xd)); |
| const MB_MODE_INFO *const left_mbmi = get_left_mbmi(get_left_mi(xd)); |
| const int above_in_image = above_mbmi != NULL; |
| const int left_in_image = left_mbmi != NULL; |
| const int above_intra = above_in_image ? !is_inter_block(above_mbmi) : 1; |
| const int left_intra = left_in_image ? !is_inter_block(left_mbmi) : 1; |
| |
| // The mode info data structure has a one element border above and to the |
| // left of the entries corresponding to real macroblocks. |
| // The prediction flags in these dummy entries are initialized to 0. |
| // 0 - inter/inter, inter/--, --/inter, --/-- |
| // 1 - intra/inter, inter/intra |
| // 2 - intra/--, --/intra |
| // 3 - intra/intra |
| if (above_in_image && left_in_image) // both edges available |
| return left_intra && above_intra ? 3 |
| : left_intra || above_intra; |
| else if (above_in_image || left_in_image) // one edge available |
| return 2 * (above_in_image ? above_intra : left_intra); |
| else |
| return 0; |
| } |
| |
| int vp9_get_reference_mode_context(const VP9_COMMON *cm, |
| const MACROBLOCKD *xd) { |
| int ctx; |
| const MB_MODE_INFO *const above_mbmi = get_above_mbmi(get_above_mi(xd)); |
| const MB_MODE_INFO *const left_mbmi = get_left_mbmi(get_left_mi(xd)); |
| const int above_in_image = above_mbmi != NULL; |
| const int left_in_image = left_mbmi != NULL; |
| // Note: |
| // The mode info data structure has a one element border above and to the |
| // left of the entries correpsonding to real macroblocks. |
| // The prediction flags in these dummy entries are initialised to 0. |
| if (above_in_image && left_in_image) { // both edges available |
| if (!has_second_ref(above_mbmi) && !has_second_ref(left_mbmi)) |
| // neither edge uses comp pred (0/1) |
| ctx = (above_mbmi->ref_frame[0] == cm->comp_fixed_ref) ^ |
| (left_mbmi->ref_frame[0] == cm->comp_fixed_ref); |
| else if (!has_second_ref(above_mbmi)) |
| // one of two edges uses comp pred (2/3) |
| ctx = 2 + (above_mbmi->ref_frame[0] == cm->comp_fixed_ref || |
| !is_inter_block(above_mbmi)); |
| else if (!has_second_ref(left_mbmi)) |
| // one of two edges uses comp pred (2/3) |
| ctx = 2 + (left_mbmi->ref_frame[0] == cm->comp_fixed_ref || |
| !is_inter_block(left_mbmi)); |
| else // both edges use comp pred (4) |
| ctx = 4; |
| } else if (above_in_image || left_in_image) { // one edge available |
| const MB_MODE_INFO *edge_mbmi = above_in_image ? above_mbmi : left_mbmi; |
| |
| if (!has_second_ref(edge_mbmi)) |
| // edge does not use comp pred (0/1) |
| ctx = edge_mbmi->ref_frame[0] == cm->comp_fixed_ref; |
| else |
| // edge uses comp pred (3) |
| ctx = 3; |
| } else { // no edges available (1) |
| ctx = 1; |
| } |
| assert(ctx >= 0 && ctx < COMP_INTER_CONTEXTS); |
| return ctx; |
| } |
| |
| // Returns a context number for the given MB prediction signal |
| unsigned char vp9_get_pred_context_comp_ref_p(const VP9_COMMON *cm, |
| const MACROBLOCKD *xd) { |
| int pred_context; |
| const MODE_INFO *const above_mi = get_above_mi(xd); |
| const MODE_INFO *const left_mi = get_left_mi(xd); |
| const MB_MODE_INFO *const above_mbmi = get_above_mbmi(above_mi); |
| const MB_MODE_INFO *const left_mbmi = get_left_mbmi(left_mi); |
| const int above_in_image = above_mi != NULL; |
| const int left_in_image = left_mi != NULL; |
| const int above_intra = above_in_image ? !is_inter_block(above_mbmi) : 1; |
| const int left_intra = left_in_image ? !is_inter_block(left_mbmi) : 1; |
| // Note: |
| // The mode info data structure has a one element border above and to the |
| // left of the entries correpsonding to real macroblocks. |
| // The prediction flags in these dummy entries are initialised to 0. |
| const int fix_ref_idx = cm->ref_frame_sign_bias[cm->comp_fixed_ref]; |
| const int var_ref_idx = !fix_ref_idx; |
| |
| if (above_in_image && left_in_image) { // both edges available |
| if (above_intra && left_intra) { // intra/intra (2) |
| pred_context = 2; |
| } else if (above_intra || left_intra) { // intra/inter |
| const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi; |
| |
| if (!has_second_ref(edge_mbmi)) // single pred (1/3) |
| pred_context = 1 + 2 * (edge_mbmi->ref_frame[0] != cm->comp_var_ref[1]); |
| else // comp pred (1/3) |
| pred_context = 1 + 2 * (edge_mbmi->ref_frame[var_ref_idx] |
| != cm->comp_var_ref[1]); |
| } else { // inter/inter |
| const int l_sg = !has_second_ref(left_mbmi); |
| const int a_sg = !has_second_ref(above_mbmi); |
| MV_REFERENCE_FRAME vrfa = a_sg ? above_mbmi->ref_frame[0] |
| : above_mbmi->ref_frame[var_ref_idx]; |
| MV_REFERENCE_FRAME vrfl = l_sg ? left_mbmi->ref_frame[0] |
| : left_mbmi->ref_frame[var_ref_idx]; |
| |
| if (vrfa == vrfl && cm->comp_var_ref[1] == vrfa) { |
| pred_context = 0; |
| } else if (l_sg && a_sg) { // single/single |
| if ((vrfa == cm->comp_fixed_ref && vrfl == cm->comp_var_ref[0]) || |
| (vrfl == cm->comp_fixed_ref && vrfa == cm->comp_var_ref[0])) |
| pred_context = 4; |
| else if (vrfa == vrfl) |
| pred_context = 3; |
| else |
| pred_context = 1; |
| } else if (l_sg || a_sg) { // single/comp |
| MV_REFERENCE_FRAME vrfc = l_sg ? vrfa : vrfl; |
| MV_REFERENCE_FRAME rfs = a_sg ? vrfa : vrfl; |
| if (vrfc == cm->comp_var_ref[1] && rfs != cm->comp_var_ref[1]) |
| pred_context = 1; |
| else if (rfs == cm->comp_var_ref[1] && vrfc != cm->comp_var_ref[1]) |
| pred_context = 2; |
| else |
| pred_context = 4; |
| } else if (vrfa == vrfl) { // comp/comp |
| pred_context = 4; |
| } else { |
| pred_context = 2; |
| } |
| } |
| } else if (above_in_image || left_in_image) { // one edge available |
| const MB_MODE_INFO *edge_mbmi = above_in_image ? above_mbmi : left_mbmi; |
| |
| if (!is_inter_block(edge_mbmi)) { |
| pred_context = 2; |
| } else { |
| if (has_second_ref(edge_mbmi)) |
| pred_context = 4 * (edge_mbmi->ref_frame[var_ref_idx] |
| != cm->comp_var_ref[1]); |
| else |
| pred_context = 3 * (edge_mbmi->ref_frame[0] != cm->comp_var_ref[1]); |
| } |
| } else { // no edges available (2) |
| pred_context = 2; |
| } |
| assert(pred_context >= 0 && pred_context < REF_CONTEXTS); |
| |
| return pred_context; |
| } |
| unsigned char vp9_get_pred_context_single_ref_p1(const MACROBLOCKD *xd) { |
| int pred_context; |
| const MODE_INFO *const above_mi = get_above_mi(xd); |
| const MODE_INFO *const left_mi = get_left_mi(xd); |
| const MB_MODE_INFO *const above_mbmi = get_above_mbmi(above_mi); |
| const MB_MODE_INFO *const left_mbmi = get_left_mbmi(left_mi); |
| const int above_in_image = above_mi != NULL; |
| const int left_in_image = left_mi != NULL; |
| const int above_intra = above_in_image ? !is_inter_block(above_mbmi) : 1; |
| const int left_intra = left_in_image ? !is_inter_block(left_mbmi) : 1; |
| // Note: |
| // The mode info data structure has a one element border above and to the |
| // left of the entries correpsonding to real macroblocks. |
| // The prediction flags in these dummy entries are initialised to 0. |
| if (above_in_image && left_in_image) { // both edges available |
| if (above_intra && left_intra) { // intra/intra |
| pred_context = 2; |
| } else if (above_intra || left_intra) { // intra/inter or inter/intra |
| const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi; |
| if (!has_second_ref(edge_mbmi)) |
| pred_context = 4 * (edge_mbmi->ref_frame[0] == LAST_FRAME); |
| else |
| pred_context = 1 + (edge_mbmi->ref_frame[0] == LAST_FRAME || |
| edge_mbmi->ref_frame[1] == LAST_FRAME); |
| } else { // inter/inter |
| if (!has_second_ref(above_mbmi) && !has_second_ref(left_mbmi)) { |
| pred_context = 2 * (above_mbmi->ref_frame[0] == LAST_FRAME) + |
| 2 * (left_mbmi->ref_frame[0] == LAST_FRAME); |
| } else if (has_second_ref(above_mbmi) && has_second_ref(left_mbmi)) { |
| pred_context = 1 + (above_mbmi->ref_frame[0] == LAST_FRAME || |
| above_mbmi->ref_frame[1] == LAST_FRAME || |
| left_mbmi->ref_frame[0] == LAST_FRAME || |
| left_mbmi->ref_frame[1] == LAST_FRAME); |
| } else { |
| const MV_REFERENCE_FRAME rfs = !has_second_ref(above_mbmi) ? |
| above_mbmi->ref_frame[0] : left_mbmi->ref_frame[0]; |
| const MV_REFERENCE_FRAME crf1 = has_second_ref(above_mbmi) ? |
| above_mbmi->ref_frame[0] : left_mbmi->ref_frame[0]; |
| const MV_REFERENCE_FRAME crf2 = has_second_ref(above_mbmi) ? |
| above_mbmi->ref_frame[1] : left_mbmi->ref_frame[1]; |
| |
| if (rfs == LAST_FRAME) |
| pred_context = 3 + (crf1 == LAST_FRAME || crf2 == LAST_FRAME); |
| else |
| pred_context = crf1 == LAST_FRAME || crf2 == LAST_FRAME; |
| } |
| } |
| } else if (above_in_image || left_in_image) { // one edge available |
| const MB_MODE_INFO *edge_mbmi = above_in_image ? above_mbmi : left_mbmi; |
| if (!is_inter_block(edge_mbmi)) { // intra |
| pred_context = 2; |
| } else { // inter |
| if (!has_second_ref(edge_mbmi)) |
| pred_context = 4 * (edge_mbmi->ref_frame[0] == LAST_FRAME); |
| else |
| pred_context = 1 + (edge_mbmi->ref_frame[0] == LAST_FRAME || |
| edge_mbmi->ref_frame[1] == LAST_FRAME); |
| } |
| } else { // no edges available |
| pred_context = 2; |
| } |
| |
| assert(pred_context >= 0 && pred_context < REF_CONTEXTS); |
| return pred_context; |
| } |
| |
| unsigned char vp9_get_pred_context_single_ref_p2(const MACROBLOCKD *xd) { |
| int pred_context; |
| const MODE_INFO *const above_mi = get_above_mi(xd); |
| const MODE_INFO *const left_mi = get_left_mi(xd); |
| const MB_MODE_INFO *const above_mbmi = get_above_mbmi(above_mi); |
| const MB_MODE_INFO *const left_mbmi = get_left_mbmi(left_mi); |
| const int above_in_image = above_mi != NULL; |
| const int left_in_image = left_mi != NULL; |
| const int above_intra = above_in_image ? !is_inter_block(above_mbmi) : 1; |
| const int left_intra = left_in_image ? !is_inter_block(left_mbmi) : 1; |
| |
| // Note: |
| // The mode info data structure has a one element border above and to the |
| // left of the entries correpsonding to real macroblocks. |
| // The prediction flags in these dummy entries are initialised to 0. |
| if (above_in_image && left_in_image) { // both edges available |
| if (above_intra && left_intra) { // intra/intra |
| pred_context = 2; |
| } else if (above_intra || left_intra) { // intra/inter or inter/intra |
| const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi; |
| if (!has_second_ref(edge_mbmi)) { |
| if (edge_mbmi->ref_frame[0] == LAST_FRAME) |
| pred_context = 3; |
| else |
| pred_context = 4 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME); |
| } else { |
| pred_context = 1 + 2 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME || |
| edge_mbmi->ref_frame[1] == GOLDEN_FRAME); |
| } |
| } else { // inter/inter |
| if (!has_second_ref(above_mbmi) && !has_second_ref(left_mbmi)) { |
| if (above_mbmi->ref_frame[0] == LAST_FRAME && |
| left_mbmi->ref_frame[0] == LAST_FRAME) { |
| pred_context = 3; |
| } else if (above_mbmi->ref_frame[0] == LAST_FRAME || |
| left_mbmi->ref_frame[0] == LAST_FRAME) { |
| const MB_MODE_INFO *edge_mbmi = |
| above_mbmi->ref_frame[0] == LAST_FRAME ? left_mbmi : above_mbmi; |
| |
| pred_context = 4 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME); |
| } else { |
| pred_context = 2 * (above_mbmi->ref_frame[0] == GOLDEN_FRAME) + |
| 2 * (left_mbmi->ref_frame[0] == GOLDEN_FRAME); |
| } |
| } else if (has_second_ref(above_mbmi) && has_second_ref(left_mbmi)) { |
| if (above_mbmi->ref_frame[0] == left_mbmi->ref_frame[0] && |
| above_mbmi->ref_frame[1] == left_mbmi->ref_frame[1]) |
| pred_context = 3 * (above_mbmi->ref_frame[0] == GOLDEN_FRAME || |
| above_mbmi->ref_frame[1] == GOLDEN_FRAME || |
| left_mbmi->ref_frame[0] == GOLDEN_FRAME || |
| left_mbmi->ref_frame[1] == GOLDEN_FRAME); |
| else |
| pred_context = 2; |
| } else { |
| const MV_REFERENCE_FRAME rfs = !has_second_ref(above_mbmi) ? |
| above_mbmi->ref_frame[0] : left_mbmi->ref_frame[0]; |
| const MV_REFERENCE_FRAME crf1 = has_second_ref(above_mbmi) ? |
| above_mbmi->ref_frame[0] : left_mbmi->ref_frame[0]; |
| const MV_REFERENCE_FRAME crf2 = has_second_ref(above_mbmi) ? |
| above_mbmi->ref_frame[1] : left_mbmi->ref_frame[1]; |
| |
| if (rfs == GOLDEN_FRAME) |
| pred_context = 3 + (crf1 == GOLDEN_FRAME || crf2 == GOLDEN_FRAME); |
| else if (rfs == ALTREF_FRAME) |
| pred_context = crf1 == GOLDEN_FRAME || crf2 == GOLDEN_FRAME; |
| else |
| pred_context = 1 + 2 * (crf1 == GOLDEN_FRAME || crf2 == GOLDEN_FRAME); |
| } |
| } |
| } else if (above_in_image || left_in_image) { // one edge available |
| const MB_MODE_INFO *edge_mbmi = above_in_image ? above_mbmi : left_mbmi; |
| |
| if (!is_inter_block(edge_mbmi) || |
| (edge_mbmi->ref_frame[0] == LAST_FRAME && !has_second_ref(edge_mbmi))) |
| pred_context = 2; |
| else if (!has_second_ref(edge_mbmi)) |
| pred_context = 4 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME); |
| else |
| pred_context = 3 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME || |
| edge_mbmi->ref_frame[1] == GOLDEN_FRAME); |
| } else { // no edges available (2) |
| pred_context = 2; |
| } |
| assert(pred_context >= 0 && pred_context < REF_CONTEXTS); |
| return pred_context; |
| } |
| // Returns a context number for the given MB prediction signal |
| // The mode info data structure has a one element border above and to the |
| // left of the entries corresponding to real blocks. |
| // The prediction flags in these dummy entries are initialized to 0. |
| unsigned char vp9_get_pred_context_tx_size(const MACROBLOCKD *xd) { |
| const int max_tx_size = max_txsize_lookup[xd->mi_8x8[0]->mbmi.sb_type]; |
| const MB_MODE_INFO *const above_mbmi = get_above_mbmi(get_above_mi(xd)); |
| const MB_MODE_INFO *const left_mbmi = get_left_mbmi(get_left_mi(xd)); |
| const int has_above = above_mbmi != NULL; |
| const int has_left = left_mbmi != NULL; |
| int above_ctx = (has_above && !above_mbmi->skip_coeff) ? above_mbmi->tx_size |
| : max_tx_size; |
| int left_ctx = (has_left && !left_mbmi->skip_coeff) ? left_mbmi->tx_size |
| : max_tx_size; |
| if (!has_left) |
| left_ctx = above_ctx; |
| |
| if (!has_above) |
| above_ctx = left_ctx; |
| |
| return (above_ctx + left_ctx) > max_tx_size; |
| } |
| |
| int vp9_get_segment_id(VP9_COMMON *cm, const uint8_t *segment_ids, |
| BLOCK_SIZE bsize, int mi_row, int mi_col) { |
| const int mi_offset = mi_row * cm->mi_cols + mi_col; |
| const int bw = num_8x8_blocks_wide_lookup[bsize]; |
| const int bh = num_8x8_blocks_high_lookup[bsize]; |
| const int xmis = MIN(cm->mi_cols - mi_col, bw); |
| const int ymis = MIN(cm->mi_rows - mi_row, bh); |
| int x, y, segment_id = INT_MAX; |
| |
| for (y = 0; y < ymis; y++) |
| for (x = 0; x < xmis; x++) |
| segment_id = MIN(segment_id, |
| segment_ids[mi_offset + y * cm->mi_cols + x]); |
| |
| assert(segment_id >= 0 && segment_id < MAX_SEGMENTS); |
| return segment_id; |
| } |
