| /* |
| * 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 "av1/common/av1_loopfilter.h" |
| #include "av1/common/blockd.h" |
| #include "av1/common/seg_common.h" |
| #include "av1/common/quant_common.h" |
| |
| static const int seg_feature_data_signed[SEG_LVL_MAX] = { |
| 1, 1, 1, 1, 1, 0, 0, 0 |
| }; |
| |
| static const int seg_feature_data_max[SEG_LVL_MAX] = { MAXQ, |
| MAX_LOOP_FILTER, |
| MAX_LOOP_FILTER, |
| MAX_LOOP_FILTER, |
| MAX_LOOP_FILTER, |
| 7, |
| 0, |
| 0 }; |
| |
| // These functions provide access to new segment level features. |
| // Eventually these function may be "optimized out" but for the moment, |
| // the coding mechanism is still subject to change so these provide a |
| // convenient single point of change. |
| |
| void av1_clearall_segfeatures(struct segmentation *seg) { |
| av1_zero(seg->feature_data); |
| av1_zero(seg->feature_mask); |
| } |
| |
| void av1_calculate_segdata(struct segmentation *seg) { |
| seg->segid_preskip = 0; |
| seg->last_active_segid = 0; |
| for (int i = 0; i < MAX_SEGMENTS; i++) { |
| for (int j = 0; j < SEG_LVL_MAX; j++) { |
| if (seg->feature_mask[i] & (1 << j)) { |
| seg->segid_preskip |= (j >= SEG_LVL_REF_FRAME); |
| seg->last_active_segid = i; |
| } |
| } |
| } |
| } |
| |
| void av1_enable_segfeature(struct segmentation *seg, int segment_id, |
| SEG_LVL_FEATURES feature_id) { |
| seg->feature_mask[segment_id] |= 1 << feature_id; |
| } |
| |
| int av1_seg_feature_data_max(SEG_LVL_FEATURES feature_id) { |
| return seg_feature_data_max[feature_id]; |
| } |
| |
| int av1_is_segfeature_signed(SEG_LVL_FEATURES feature_id) { |
| return seg_feature_data_signed[feature_id]; |
| } |
| |
| // The 'seg_data' given for each segment can be either deltas (from the default |
| // value chosen for the frame) or absolute values. |
| // |
| // Valid range for abs values is (0-127 for MB_LVL_ALT_Q), (0-63 for |
| // SEGMENT_ALT_LF) |
| // Valid range for delta values are (+/-127 for MB_LVL_ALT_Q), (+/-63 for |
| // SEGMENT_ALT_LF) |
| // |
| // abs_delta = SEGMENT_DELTADATA (deltas) abs_delta = SEGMENT_ABSDATA (use |
| // the absolute values given). |
| |
| void av1_set_segdata(struct segmentation *seg, int segment_id, |
| SEG_LVL_FEATURES feature_id, int seg_data) { |
| if (seg_data < 0) { |
| assert(seg_feature_data_signed[feature_id]); |
| assert(-seg_data <= seg_feature_data_max[feature_id]); |
| } else { |
| assert(seg_data <= seg_feature_data_max[feature_id]); |
| } |
| |
| seg->feature_data[segment_id][feature_id] = seg_data; |
| } |
| |
| // TBD? Functions to read and write segment data with range / validity checking |