1 /*
2 * Copyright (C) 2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "box/item_ref_box.h"
17
18 #include <algorithm>
19
20 namespace OHOS {
21 namespace ImagePlugin {
ParseItemRef(HeifStreamReader & reader,Reference & ref)22 void HeifIrefBox::ParseItemRef(HeifStreamReader &reader, Reference& ref)
23 {
24 if (GetVersion() == HEIF_BOX_VERSION_ZERO) {
25 ref.fromItemId = reader.Read16();
26 int nRefs = reader.Read16();
27 for (int i = 0; i < nRefs; i++) {
28 ref.toItemIds.push_back(reader.Read16());
29 if (reader.IsAtEnd()) {
30 break;
31 }
32 }
33 } else {
34 ref.fromItemId = reader.Read32();
35 int nRefs = reader.Read16();
36 for (int i = 0; i < nRefs; i++) {
37 ref.toItemIds.push_back(reader.Read32());
38 if (reader.IsAtEnd()) {
39 break;
40 }
41 }
42 }
43 }
44
ParseContent(HeifStreamReader & reader)45 heif_error HeifIrefBox::ParseContent(HeifStreamReader &reader)
46 {
47 ParseFullHeader(reader);
48 while (!reader.IsAtEnd()) {
49 Reference ref;
50 heif_error err = ref.box.ParseHeader(reader);
51 if (err != heif_error_ok) {
52 return err;
53 }
54 ParseItemRef(reader, ref);
55 references_.push_back(ref);
56 }
57
58 return reader.GetError();
59 }
60
InferFullBoxVersion()61 void HeifIrefBox::InferFullBoxVersion()
62 {
63 uint8_t version = 0;
64 for (auto &ref: references_) {
65 if ((ref.fromItemId >> TWO_BYTES_SHIFT) > 0) {
66 version = HEIF_BOX_VERSION_ONE;
67 SetVersion(version);
68 return;
69 }
70
71 for (auto id: ref.toItemIds) {
72 if ((id >> TWO_BYTES_SHIFT) > 0) {
73 version = HEIF_BOX_VERSION_ONE;
74 SetVersion(version);
75 return;
76 }
77 }
78 }
79 SetVersion(version);
80 }
81
82
Write(HeifStreamWriter & writer) const83 heif_error HeifIrefBox::Write(HeifStreamWriter &writer) const
84 {
85 size_t boxStart = ReserveHeader(writer);
86
87 int idSize = ((GetVersion() == HEIF_BOX_VERSION_ZERO) ? UINT16_BYTES_NUM : UINT32_BYTES_NUM);
88
89 for (const auto &ref: references_) {
90 auto box_size = uint32_t(UINT32_BYTES_NUM + UINT32_BYTES_NUM + UINT16_BYTES_NUM +
91 static_cast<size_t>(idSize) * (UINT8_BYTES_NUM + ref.toItemIds.size()));
92
93 writer.Write32(box_size);
94 writer.Write32(ref.box.GetBoxType());
95
96 writer.Write(idSize, ref.fromItemId);
97 writer.Write16((uint16_t) ref.toItemIds.size());
98
99 for (uint32_t r: ref.toItemIds) {
100 writer.Write(idSize, r);
101 }
102 }
103 WriteCalculatedHeader(writer, boxStart);
104
105 return heif_error_ok;
106 }
107
HasReferences(heif_item_id itemId) const108 bool HeifIrefBox::HasReferences(heif_item_id itemId) const
109 {
110 return std::any_of(references_.begin(), references_.end(), [&itemId](const auto& ref) {
111 return ref.fromItemId == itemId;
112 });
113 }
114
115
GetReferencesFrom(heif_item_id itemId) const116 std::vector<HeifIrefBox::Reference> HeifIrefBox::GetReferencesFrom(heif_item_id itemId) const
117 {
118 std::vector<Reference> references;
119 for (const Reference &ref: references_) {
120 if (ref.fromItemId == itemId) {
121 references.push_back(ref);
122 }
123 }
124 return references;
125 }
126
127
GetReferences(heif_item_id itemId,uint32_t ref_type) const128 std::vector<uint32_t> HeifIrefBox::GetReferences(heif_item_id itemId, uint32_t ref_type) const
129 {
130 std::vector<uint32_t> res{};
131 auto iter = std::find_if(references_.begin(), references_.end(), [&itemId, &ref_type](const auto& ref) {
132 return ref.fromItemId == itemId && ref.box.GetBoxType() == ref_type;
133 });
134 return iter == references_.end() ? res : iter->toItemIds;
135 }
136
137
AddReferences(heif_item_id from_id,uint32_t type,const std::vector<heif_item_id> & to_ids)138 void HeifIrefBox::AddReferences(heif_item_id from_id, uint32_t type, const std::vector<heif_item_id> &to_ids)
139 {
140 Reference ref;
141 ref.box.SetBoxType(type);
142 ref.fromItemId = from_id;
143 ref.toItemIds = to_ids;
144 references_.push_back(ref);
145 }
146 } // namespace ImagePlugin
147 } // namespace OHOS