1 /*
2 * Copyright 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "change_path.h"
18
19 namespace bluetooth {
20 namespace avrcp {
21
22 std::unique_ptr<ChangePathResponseBuilder>
MakeBuilder(Status status,uint32_t num_items_in_folder)23 ChangePathResponseBuilder::MakeBuilder(Status status,
24 uint32_t num_items_in_folder) {
25 std::unique_ptr<ChangePathResponseBuilder> builder(
26 new ChangePathResponseBuilder(status, num_items_in_folder));
27
28 return builder;
29 }
30
size() const31 size_t ChangePathResponseBuilder::size() const {
32 size_t len = BrowsePacket::kMinSize();
33 len += 1; // Status
34 if (status_ != Status::NO_ERROR) return len;
35
36 len += 4; // Number of items in folder
37 return len;
38 }
39
Serialize(const std::shared_ptr<::bluetooth::Packet> & pkt)40 bool ChangePathResponseBuilder::Serialize(
41 const std::shared_ptr<::bluetooth::Packet>& pkt) {
42 ReserveSpace(pkt, size());
43
44 BrowsePacketBuilder::PushHeader(pkt, size() - BrowsePacket::kMinSize());
45
46 AddPayloadOctets1(pkt, (uint8_t)status_);
47 if (status_ != Status::NO_ERROR) return true;
48
49 AddPayloadOctets4(pkt, base::ByteSwap(num_items_in_folder_));
50 return true;
51 }
52
GetUidCounter() const53 uint16_t ChangePathRequest::GetUidCounter() const {
54 auto it = begin() + BrowsePacket::kMinSize();
55 return it.extractBE<uint16_t>();
56 }
57
GetDirection() const58 Direction ChangePathRequest::GetDirection() const {
59 auto it = begin() + BrowsePacket::kMinSize() + static_cast<size_t>(2);
60 return static_cast<Direction>(*it);
61 }
62
GetUid() const63 uint64_t ChangePathRequest::GetUid() const {
64 auto it = begin() + BrowsePacket::kMinSize() + static_cast<size_t>(3);
65 return it.extractBE<uint64_t>();
66 }
67
IsValid() const68 bool ChangePathRequest::IsValid() const {
69 if (!BrowsePacket::IsValid()) return false;
70 // Change path request packets are always the same size
71 return size() == kMinSize();
72 }
73
ToString() const74 std::string ChangePathRequest::ToString() const {
75 std::stringstream ss;
76 ss << "ChangePathRequestPacket: " << std::endl;
77 ss << " └ PDU = " << GetPdu() << std::endl;
78 ss << " └ Length = " << GetLength() << std::endl;
79 ss << " └ UID Counter = " << loghex(GetUidCounter()) << std::endl;
80 ss << " └ Direction = " << GetDirection() << std::endl;
81 ss << " └ UID Requested = " << loghex(GetUid()) << std::endl;
82 ss << std::endl;
83
84 return ss.str();
85 }
86
MakeBuilder(uint16_t uid_counter,Direction direction,uint64_t folder_uid)87 std::unique_ptr<ChangePathRequestBuilder> ChangePathRequestBuilder::MakeBuilder(
88 uint16_t uid_counter, Direction direction, uint64_t folder_uid) {
89 std::unique_ptr<ChangePathRequestBuilder> builder(
90 new ChangePathRequestBuilder(uid_counter, direction, folder_uid));
91
92 return builder;
93 }
94
size() const95 size_t ChangePathRequestBuilder::size() const {
96 return ChangePathRequest::kMinSize();
97 }
98
Serialize(const std::shared_ptr<::bluetooth::Packet> & pkt)99 bool ChangePathRequestBuilder::Serialize(
100 const std::shared_ptr<::bluetooth::Packet>& pkt) {
101 ReserveSpace(pkt, size());
102
103 BrowsePacketBuilder::PushHeader(pkt, size() - BrowsePacket::kMinSize());
104
105 AddPayloadOctets2(pkt, base::ByteSwap(uid_counter_));
106 AddPayloadOctets1(pkt, static_cast<uint8_t>(direction_));
107 AddPayloadOctets8(pkt, base::ByteSwap(folder_uid_));
108 return true;
109 }
110
111 } // namespace avrcp
112 } // namespace bluetooth
113