Ajay Panicker | 2c822c9 | 2018-02-21 21:04:24 -0800 | [diff] [blame] | 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 | #pragma once |
| 18 | |
| 19 | #include <map> |
| 20 | |
| 21 | namespace bluetooth { |
| 22 | namespace avrcp { |
| 23 | |
| 24 | // A helper class to convert Media ID's (represented as strings) that are |
| 25 | // received from the AVRCP Media Interface layer into UID's to be used |
| 26 | // with connected devices. |
| 27 | class MediaIdMap { |
| 28 | public: |
| 29 | void clear() { |
| 30 | media_id_to_uid_.clear(); |
| 31 | uid_to_media_id_.clear(); |
| 32 | } |
| 33 | |
| 34 | std::string get_media_id(uint64_t uid) { |
| 35 | const auto& uid_it = uid_to_media_id_.find(uid); |
| 36 | if (uid_it == uid_to_media_id_.end()) return ""; |
| 37 | return uid_it->second; |
| 38 | } |
| 39 | |
| 40 | uint64_t get_uid(std::string media_id) { |
| 41 | const auto& media_id_it = media_id_to_uid_.find(media_id); |
| 42 | if (media_id_it == media_id_to_uid_.end()) return 0; |
| 43 | return media_id_it->second; |
| 44 | } |
| 45 | |
| 46 | uint64_t insert(std::string media_id) { |
Ajay Panicker | fc136d1 | 2018-04-02 18:21:04 -0700 | [diff] [blame^] | 47 | if (media_id_to_uid_.find(media_id) != media_id_to_uid_.end()) { |
| 48 | return media_id_to_uid_[media_id]; |
| 49 | } |
| 50 | |
Ajay Panicker | 2c822c9 | 2018-02-21 21:04:24 -0800 | [diff] [blame] | 51 | uint64_t uid = media_id_to_uid_.size() + 1; |
| 52 | media_id_to_uid_.insert(std::pair<std::string, uint64_t>(media_id, uid)); |
| 53 | uid_to_media_id_.insert(std::pair<uint64_t, std::string>(uid, media_id)); |
| 54 | return uid; |
| 55 | } |
| 56 | |
| 57 | private: |
| 58 | std::map<std::string, uint64_t> media_id_to_uid_; |
| 59 | std::map<uint64_t, std::string> uid_to_media_id_; |
| 60 | }; |
| 61 | |
| 62 | } // namespace avrcp |
| 63 | } // namespace bluetooth |