91 lines
3.2 KiB
C
91 lines
3.2 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved.
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#include <assert.h>
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#include "av1/common/av1_loopfilter.h"
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#include "av1/common/blockd.h"
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#include "av1/common/seg_common.h"
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#include "av1/common/quant_common.h"
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static const int seg_feature_data_signed[SEG_LVL_MAX] = {
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1, 1, 1, 1, 1, 0, 0, 0
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};
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static const int seg_feature_data_max[SEG_LVL_MAX] = { MAXQ,
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MAX_LOOP_FILTER,
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MAX_LOOP_FILTER,
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MAX_LOOP_FILTER,
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MAX_LOOP_FILTER,
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7,
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0,
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0 };
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// These functions provide access to new segment level features.
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// Eventually these function may be "optimized out" but for the moment,
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// the coding mechanism is still subject to change so these provide a
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// convenient single point of change.
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void av1_clearall_segfeatures(struct segmentation *seg) {
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av1_zero(seg->feature_data);
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av1_zero(seg->feature_mask);
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}
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void av1_calculate_segdata(struct segmentation *seg) {
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seg->segid_preskip = 0;
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seg->last_active_segid = 0;
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for (int i = 0; i < MAX_SEGMENTS; i++) {
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for (int j = 0; j < SEG_LVL_MAX; j++) {
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if (seg->feature_mask[i] & (1 << j)) {
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seg->segid_preskip |= (j >= SEG_LVL_REF_FRAME);
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seg->last_active_segid = i;
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}
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}
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}
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}
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void av1_enable_segfeature(struct segmentation *seg, int segment_id,
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SEG_LVL_FEATURES feature_id) {
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seg->feature_mask[segment_id] |= 1 << feature_id;
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}
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int av1_seg_feature_data_max(SEG_LVL_FEATURES feature_id) {
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return seg_feature_data_max[feature_id];
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}
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int av1_is_segfeature_signed(SEG_LVL_FEATURES feature_id) {
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return seg_feature_data_signed[feature_id];
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}
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// The 'seg_data' given for each segment can be either deltas (from the default
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// value chosen for the frame) or absolute values.
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//
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// Valid range for abs values is (0-127 for MB_LVL_ALT_Q), (0-63 for
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// SEGMENT_ALT_LF)
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// Valid range for delta values are (+/-127 for MB_LVL_ALT_Q), (+/-63 for
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// SEGMENT_ALT_LF)
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//
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// abs_delta = SEGMENT_DELTADATA (deltas) abs_delta = SEGMENT_ABSDATA (use
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// the absolute values given).
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void av1_set_segdata(struct segmentation *seg, int segment_id,
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SEG_LVL_FEATURES feature_id, int seg_data) {
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if (seg_data < 0) {
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assert(seg_feature_data_signed[feature_id]);
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assert(-seg_data <= seg_feature_data_max[feature_id]);
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} else {
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assert(seg_data <= seg_feature_data_max[feature_id]);
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}
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seg->feature_data[segment_id][feature_id] = seg_data;
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}
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// TBD? Functions to read and write segment data with range / validity checking
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