Coverage Report

Created: 2025-06-13 07:07

/src/aom/av1/common/seg_common.c
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Source
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/*
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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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168k
void av1_clearall_segfeatures(struct segmentation *seg) {
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168k
  av1_zero(seg->feature_data);
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168k
  av1_zero(seg->feature_mask);
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168k
}
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16.5k
void av1_calculate_segdata(struct segmentation *seg) {
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16.5k
  seg->segid_preskip = 0;
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16.5k
  seg->last_active_segid = 0;
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148k
  for (int i = 0; i < MAX_SEGMENTS; i++) {
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1.18M
    for (int j = 0; j < SEG_LVL_MAX; j++) {
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1.05M
      if (seg->feature_mask[i] & (1 << j)) {
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263k
        seg->segid_preskip |= (j >= SEG_LVL_REF_FRAME);
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263k
        seg->last_active_segid = i;
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263k
      }
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1.05M
    }
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132k
  }
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16.5k
}
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void av1_enable_segfeature(struct segmentation *seg, int segment_id,
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278k
                           SEG_LVL_FEATURES feature_id) {
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278k
  seg->feature_mask[segment_id] |= 1 << feature_id;
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278k
}
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278k
int av1_seg_feature_data_max(SEG_LVL_FEATURES feature_id) {
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278k
  return seg_feature_data_max[feature_id];
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278k
}
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278k
int av1_is_segfeature_signed(SEG_LVL_FEATURES feature_id) {
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278k
  return seg_feature_data_signed[feature_id];
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278k
}
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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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1.13M
                     SEG_LVL_FEATURES feature_id, int seg_data) {
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1.13M
  if (seg_data < 0) {
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89.8k
    assert(seg_feature_data_signed[feature_id]);
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89.8k
    assert(-seg_data <= seg_feature_data_max[feature_id]);
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1.04M
  } else {
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1.04M
    assert(seg_data <= seg_feature_data_max[feature_id]);
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1.04M
  }
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1.13M
  seg->feature_data[segment_id][feature_id] = seg_data;
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1.13M
}
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// TBD? Functions to read and write segment data with range / validity checking