1 /* 2 * Copyright 2021 HIMSA II K/S - www.himsa.com. 3 * Represented by EHIMA - www.ehima.com 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 #pragma once 19 20 #include <optional> 21 #include <string> 22 23 #include "bt_types.h" 24 #include "hardware/bt_has.h" 25 26 namespace le_audio { 27 namespace has { 28 /* Represents preset instance. It stores properties such as preset name, 29 * preset index and if it supports renaming. Also stores all the needed 30 * GATT characteristics and descriptor informations. 31 */ 32 class HasPreset { 33 private: 34 mutable std::string name_; 35 mutable uint8_t properties_; 36 uint8_t index_; 37 38 public: 39 static constexpr size_t kCharValueMinSize = 1 /*index*/ + 1 /*properties*/; 40 41 static constexpr uint8_t kPropertyWritable = 0x01; 42 static constexpr uint8_t kPropertyAvailable = 0x02; 43 44 static constexpr uint8_t kPresetNameLengthLimit = 40; 45 46 HasPreset(uint8_t index, uint8_t props = 0, 47 std::optional<std::string> name = std::nullopt) properties_(props)48 : properties_(props), index_(index) { 49 name_ = name.value_or(""); 50 } HasPreset()51 HasPreset() 52 : name_(""), 53 properties_(0), 54 index_(bluetooth::has::kHasPresetIndexInvalid) {} 55 GetName()56 auto& GetName() const { return name_; } GetIndex()57 decltype(index_) GetIndex() const { return index_; } GetProperties()58 decltype(properties_) GetProperties() const { return properties_; } IsWritable()59 bool IsWritable() const { return properties_ & kPropertyWritable; } IsAvailable()60 bool IsAvailable() const { return properties_ & kPropertyAvailable; } 61 62 HasPreset& operator=(const HasPreset& other) { 63 LOG_ASSERT(index_ == other.GetIndex()) 64 << "Assigning immutable preset index!"; 65 66 if ((this != &other) && (*this != other)) { 67 index_ = other.GetIndex(); 68 name_ = other.GetName(); 69 } 70 return *this; 71 } 72 73 bool operator==(const HasPreset& b) const { 74 return (index_ == b.index_) && (properties_ == b.properties_) && 75 (name_ == b.name_); 76 } 77 bool operator!=(const HasPreset& b) const { 78 return (index_ != b.index_) || (properties_ != b.properties_) || 79 (name_ != b.name_); 80 } 81 bool operator<(const HasPreset& b) const { return index_ < b.index_; } 82 friend std::ostream& operator<<(std::ostream& os, const HasPreset& b); 83 84 struct ComparatorDesc { 85 using is_transparent = void; operatorComparatorDesc86 bool operator()(HasPreset const& a, int index) const { 87 return a.index_ < index; 88 } operatorComparatorDesc89 bool operator()(int index, HasPreset const& a) const { 90 return index < a.index_; 91 } operatorComparatorDesc92 bool operator()(HasPreset const& a, HasPreset const& b) const { 93 return a.index_ < b.index_; 94 } 95 }; 96 97 static std::optional<HasPreset> FromCharacteristicValue(uint16_t& len, 98 const uint8_t* value); 99 void ToCharacteristicValue(std::vector<uint8_t>& value) const; 100 101 /* Calculates buffer space that the preset will use when serialized */ SerializedSize()102 uint8_t SerializedSize() const { 103 return (sizeof(index_) + sizeof(properties_) + 1 /* name length */ 104 + name_.length()); 105 } 106 /* Serializes into binary blob for the persistent storage */ 107 uint8_t* Serialize(uint8_t* p_out, size_t buffer_size) const; 108 /* Deserializes binary blob read from the persistent storage */ 109 static const uint8_t* Deserialize(const uint8_t* p_in, size_t len, 110 HasPreset& preset); 111 }; 112 113 } // namespace has 114 } // namespace le_audio 115