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) { 47 if (media_id_to_uid_.find(media_id) != media_id_to_uid_.end()) { 48 return media_id_to_uid_[media_id]; 49 } 50 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 64
