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> 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 31 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 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 53 uint16_t ChangePathRequest::GetUidCounter() const { 54 auto it = begin() + BrowsePacket::kMinSize(); 55 return base::ByteSwap(it.extract<uint16_t>()); 56 } 57 58 Direction ChangePathRequest::GetDirection() const { 59 auto it = begin() + BrowsePacket::kMinSize() + static_cast<size_t>(2); 60 return static_cast<Direction>(*it); 61 } 62 63 uint64_t ChangePathRequest::GetUid() const { 64 auto it = begin() + BrowsePacket::kMinSize() + static_cast<size_t>(3); 65 return base::ByteSwap(it.extract<uint64_t>()); 66 } 67 68 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 74 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 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 95 size_t ChangePathRequestBuilder::size() const { 96 return ChangePathRequest::kMinSize(); 97 } 98 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
