/src/aom/av1/common/seg_common.c

Source
/*
 * 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

Line	Count	Source
1		/*
2		* Copyright (c) 2016, Alliance for Open Media. All rights reserved.
3		*
4		* This source code is subject to the terms of the BSD 2 Clause License and
5		* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6		* was not distributed with this source code in the LICENSE file, you can
7		* obtain it at www.aomedia.org/license/software. If the Alliance for Open
8		* Media Patent License 1.0 was not distributed with this source code in the
9		* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10		*/
11
12		#include <assert.h>
13
14		#include "av1/common/av1_loopfilter.h"
15		#include "av1/common/blockd.h"
16		#include "av1/common/seg_common.h"
17		#include "av1/common/quant_common.h"
18
19		static const int seg_feature_data_signed[SEG_LVL_MAX] = {
20		1, 1, 1, 1, 1, 0, 0, 0
21		};
22
23		static const int seg_feature_data_max[SEG_LVL_MAX] = { MAXQ,
24		MAX_LOOP_FILTER,
25		MAX_LOOP_FILTER,
26		MAX_LOOP_FILTER,
27		MAX_LOOP_FILTER,
28		7,
29		0,
30		0 };
31
32		// These functions provide access to new segment level features.
33		// Eventually these function may be "optimized out" but for the moment,
34		// the coding mechanism is still subject to change so these provide a
35		// convenient single point of change.
36
37	139k	void av1_clearall_segfeatures(struct segmentation *seg) {
38	139k	av1_zero(seg->feature_data);
39	139k	av1_zero(seg->feature_mask);
40	139k	}
41
42	14.1k	void av1_calculate_segdata(struct segmentation *seg) {
43	14.1k	seg->segid_preskip = 0;
44	14.1k	seg->last_active_segid = 0;
45	127k	for (int i = 0; i < MAX_SEGMENTS; i++) {
46	1.01M	for (int j = 0; j < SEG_LVL_MAX; j++) {
47	905k	if (seg->feature_mask[i] & (1 << j)) {
48	238k	seg->segid_preskip \|= (j >= SEG_LVL_REF_FRAME);
49	238k	seg->last_active_segid = i;
50	238k	}
51	905k	}
52	113k	}
53	14.1k	}
54
55		void av1_enable_segfeature(struct segmentation *seg, int segment_id,
56	259k	SEG_LVL_FEATURES feature_id) {
57	259k	seg->feature_mask[segment_id] \|= 1 << feature_id;
58	259k	}
59
60	259k	int av1_seg_feature_data_max(SEG_LVL_FEATURES feature_id) {
61	259k	return seg_feature_data_max[feature_id];
62	259k	}
63
64	259k	int av1_is_segfeature_signed(SEG_LVL_FEATURES feature_id) {
65	259k	return seg_feature_data_signed[feature_id];
66	259k	}
67
68		// The 'seg_data' given for each segment can be either deltas (from the default
69		// value chosen for the frame) or absolute values.
70		//
71		// Valid range for abs values is (0-127 for MB_LVL_ALT_Q), (0-63 for
72		// SEGMENT_ALT_LF)
73		// Valid range for delta values are (+/-127 for MB_LVL_ALT_Q), (+/-63 for
74		// SEGMENT_ALT_LF)
75		//
76		// abs_delta = SEGMENT_DELTADATA (deltas) abs_delta = SEGMENT_ABSDATA (use
77		// the absolute values given).
78
79		void av1_set_segdata(struct segmentation *seg, int segment_id,
80	1.01M	SEG_LVL_FEATURES feature_id, int seg_data) {
81	1.01M	if (seg_data < 0) {
82	87.7k	assert(seg_feature_data_signed[feature_id]);
83	87.7k	assert(-seg_data <= seg_feature_data_max[feature_id]);
84	922k	} else {
85	922k	assert(seg_data <= seg_feature_data_max[feature_id]);
86	922k	}
87
88	1.01M	seg->feature_data[segment_id][feature_id] = seg_data;
89	1.01M	}
90
91		// TBD? Functions to read and write segment data with range / validity checking

Coverage Report

Created: 2026-07-14 07:20