| |
| /* |
| * 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 "vp10/common/common.h" |
| #include "vp10/common/pred_common.h" |
| #include "vp10/common/seg_common.h" |
| |
| // Returns a context number for the given MB prediction signal |
| int vp10_get_pred_context_switchable_interp(const MACROBLOCKD *xd) { |
| // Note: |
| // 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. |
| const MB_MODE_INFO *const left_mbmi = xd->left_mbmi; |
| const int left_type = xd->left_available && is_inter_block(left_mbmi) ? |
| left_mbmi->interp_filter : SWITCHABLE_FILTERS; |
| const MB_MODE_INFO *const above_mbmi = xd->above_mbmi; |
| const int above_type = xd->up_available && is_inter_block(above_mbmi) ? |
| above_mbmi->interp_filter : SWITCHABLE_FILTERS; |
| |
| if (left_type == above_type) |
| return left_type; |
| else if (left_type == SWITCHABLE_FILTERS && above_type != SWITCHABLE_FILTERS) |
| return above_type; |
| else if (left_type != SWITCHABLE_FILTERS && above_type == SWITCHABLE_FILTERS) |
| return left_type; |
| else |
| return SWITCHABLE_FILTERS; |
| } |
| |
| // 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 |
| int vp10_get_intra_inter_context(const MACROBLOCKD *xd) { |
| const MB_MODE_INFO *const above_mbmi = xd->above_mbmi; |
| const MB_MODE_INFO *const left_mbmi = xd->left_mbmi; |
| const int has_above = xd->up_available; |
| const int has_left = xd->left_available; |
| |
| if (has_above && has_left) { // both edges available |
| const int above_intra = !is_inter_block(above_mbmi); |
| const int left_intra = !is_inter_block(left_mbmi); |
| return left_intra && above_intra ? 3 |
| : left_intra || above_intra; |
| } else if (has_above || has_left) { // one edge available |
| return 2 * !is_inter_block(has_above ? above_mbmi : left_mbmi); |
| } else { |
| return 0; |
| } |
| } |
| |
| int vp10_get_reference_mode_context(const VP10_COMMON *cm, |
| const MACROBLOCKD *xd) { |
| int ctx; |
| const MB_MODE_INFO *const above_mbmi = xd->above_mbmi; |
| const MB_MODE_INFO *const left_mbmi = xd->left_mbmi; |
| const int has_above = xd->up_available; |
| const int has_left = xd->left_available; |
| // Note: |
| // 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. |
| if (has_above && has_left) { // 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 (has_above || has_left) { // one edge available |
| const MB_MODE_INFO *edge_mbmi = has_above ? 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 |
| int vp10_get_pred_context_comp_ref_p(const VP10_COMMON *cm, |
| const MACROBLOCKD *xd) { |
| int pred_context; |
| const MB_MODE_INFO *const above_mbmi = xd->above_mbmi; |
| const MB_MODE_INFO *const left_mbmi = xd->left_mbmi; |
| const int above_in_image = xd->up_available; |
| const int left_in_image = xd->left_available; |
| |
| // Note: |
| // 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. |
| 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 |
| const int above_intra = !is_inter_block(above_mbmi); |
| const int left_intra = !is_inter_block(left_mbmi); |
| |
| 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); |
| const MV_REFERENCE_FRAME vrfa = a_sg ? above_mbmi->ref_frame[0] |
| : above_mbmi->ref_frame[var_ref_idx]; |
| const 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 |
| const MV_REFERENCE_FRAME vrfc = l_sg ? vrfa : vrfl; |
| const 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; |
| } |
| |
| int vp10_get_pred_context_single_ref_p1(const MACROBLOCKD *xd) { |
| int pred_context; |
| const MB_MODE_INFO *const above_mbmi = xd->above_mbmi; |
| const MB_MODE_INFO *const left_mbmi = xd->left_mbmi; |
| const int has_above = xd->up_available; |
| const int has_left = xd->left_available; |
| // Note: |
| // 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. |
| if (has_above && has_left) { // both edges available |
| const int above_intra = !is_inter_block(above_mbmi); |
| const int left_intra = !is_inter_block(left_mbmi); |
| |
| 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 |
| const int above_has_second = has_second_ref(above_mbmi); |
| const int left_has_second = has_second_ref(left_mbmi); |
| const MV_REFERENCE_FRAME above0 = above_mbmi->ref_frame[0]; |
| const MV_REFERENCE_FRAME above1 = above_mbmi->ref_frame[1]; |
| const MV_REFERENCE_FRAME left0 = left_mbmi->ref_frame[0]; |
| const MV_REFERENCE_FRAME left1 = left_mbmi->ref_frame[1]; |
| |
| if (above_has_second && left_has_second) { |
| pred_context = 1 + (above0 == LAST_FRAME || above1 == LAST_FRAME || |
| left0 == LAST_FRAME || left1 == LAST_FRAME); |
| } else if (above_has_second || left_has_second) { |
| const MV_REFERENCE_FRAME rfs = !above_has_second ? above0 : left0; |
| const MV_REFERENCE_FRAME crf1 = above_has_second ? above0 : left0; |
| const MV_REFERENCE_FRAME crf2 = above_has_second ? above1 : left1; |
| |
| if (rfs == LAST_FRAME) |
| pred_context = 3 + (crf1 == LAST_FRAME || crf2 == LAST_FRAME); |
| else |
| pred_context = (crf1 == LAST_FRAME || crf2 == LAST_FRAME); |
| } else { |
| pred_context = 2 * (above0 == LAST_FRAME) + 2 * (left0 == LAST_FRAME); |
| } |
| } |
| } else if (has_above || has_left) { // one edge available |
| const MB_MODE_INFO *edge_mbmi = has_above ? 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; |
| } |
| |
| int vp10_get_pred_context_single_ref_p2(const MACROBLOCKD *xd) { |
| int pred_context; |
| const MB_MODE_INFO *const above_mbmi = xd->above_mbmi; |
| const MB_MODE_INFO *const left_mbmi = xd->left_mbmi; |
| const int has_above = xd->up_available; |
| const int has_left = xd->left_available; |
| |
| // Note: |
| // 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. |
| if (has_above && has_left) { // both edges available |
| const int above_intra = !is_inter_block(above_mbmi); |
| const int left_intra = !is_inter_block(left_mbmi); |
| |
| 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 |
| const int above_has_second = has_second_ref(above_mbmi); |
| const int left_has_second = has_second_ref(left_mbmi); |
| const MV_REFERENCE_FRAME above0 = above_mbmi->ref_frame[0]; |
| const MV_REFERENCE_FRAME above1 = above_mbmi->ref_frame[1]; |
| const MV_REFERENCE_FRAME left0 = left_mbmi->ref_frame[0]; |
| const MV_REFERENCE_FRAME left1 = left_mbmi->ref_frame[1]; |
| |
| if (above_has_second && left_has_second) { |
| if (above0 == left0 && above1 == left1) |
| pred_context = 3 * (above0 == GOLDEN_FRAME || |
| above1 == GOLDEN_FRAME || |
| left0 == GOLDEN_FRAME || |
| left1 == GOLDEN_FRAME); |
| else |
| pred_context = 2; |
| } else if (above_has_second || left_has_second) { |
| const MV_REFERENCE_FRAME rfs = !above_has_second ? above0 : left0; |
| const MV_REFERENCE_FRAME crf1 = above_has_second ? above0 : left0; |
| const MV_REFERENCE_FRAME crf2 = above_has_second ? above1 : left1; |
| |
| 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 (above0 == LAST_FRAME && left0 == LAST_FRAME) { |
| pred_context = 3; |
| } else if (above0 == LAST_FRAME || left0 == LAST_FRAME) { |
| const MV_REFERENCE_FRAME edge0 = (above0 == LAST_FRAME) ? left0 |
| : above0; |
| pred_context = 4 * (edge0 == GOLDEN_FRAME); |
| } else { |
| pred_context = 2 * (above0 == GOLDEN_FRAME) + |
| 2 * (left0 == GOLDEN_FRAME); |
| } |
| } |
| } |
| } else if (has_above || has_left) { // one edge available |
| const MB_MODE_INFO *edge_mbmi = has_above ? 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; |
| } |
