1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
/*
* Copyright 2021 HIMSA II K/S - www.himsa.com.
* Represented by EHIMA - www.ehima.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <optional>
#include <string>
#include "bt_types.h"
#include "hardware/bt_has.h"
namespace le_audio {
namespace has {
/* Represents preset instance. It stores properties such as preset name,
* preset index and if it supports renaming. Also stores all the needed
* GATT characteristics and descriptor informations.
*/
class HasPreset {
private:
mutable std::string name_;
mutable uint8_t properties_;
uint8_t index_;
public:
static constexpr size_t kCharValueMinSize = 1 /*index*/ + 1 /*properties*/;
static constexpr uint8_t kPropertyWritable = 0x01;
static constexpr uint8_t kPropertyAvailable = 0x02;
static constexpr uint8_t kPresetNameLengthLimit = 40;
HasPreset(uint8_t index, uint8_t props = 0,
std::optional<std::string> name = std::nullopt)
: properties_(props), index_(index) {
name_ = name.value_or("");
}
HasPreset()
: name_(""),
properties_(0),
index_(bluetooth::has::kHasPresetIndexInvalid) {}
auto& GetName() const { return name_; }
decltype(index_) GetIndex() const { return index_; }
decltype(properties_) GetProperties() const { return properties_; }
bool IsWritable() const { return properties_ & kPropertyWritable; }
bool IsAvailable() const { return properties_ & kPropertyAvailable; }
HasPreset& operator=(const HasPreset& other) {
LOG_ASSERT(index_ == other.GetIndex())
<< "Assigning immutable preset index!";
if ((this != &other) && (*this != other)) {
index_ = other.GetIndex();
name_ = other.GetName();
}
return *this;
}
bool operator==(const HasPreset& b) const {
return (index_ == b.index_) && (properties_ == b.properties_) &&
(name_ == b.name_);
}
bool operator!=(const HasPreset& b) const {
return (index_ != b.index_) || (properties_ != b.properties_) ||
(name_ != b.name_);
}
bool operator<(const HasPreset& b) const { return index_ < b.index_; }
friend std::ostream& operator<<(std::ostream& os, const HasPreset& b);
struct ComparatorDesc {
using is_transparent = void;
bool operator()(HasPreset const& a, int index) const {
return a.index_ < index;
}
bool operator()(int index, HasPreset const& a) const {
return index < a.index_;
}
bool operator()(HasPreset const& a, HasPreset const& b) const {
return a.index_ < b.index_;
}
};
static std::optional<HasPreset> FromCharacteristicValue(uint16_t& len,
const uint8_t* value);
void ToCharacteristicValue(std::vector<uint8_t>& value) const;
/* Calculates buffer space that the preset will use when serialized */
uint8_t SerializedSize() const {
return (sizeof(index_) + sizeof(properties_) + 1 /* name length */
+ name_.length());
}
/* Serializes into binary blob for the persistent storage */
uint8_t* Serialize(uint8_t* p_out, size_t buffer_size) const;
/* Deserializes binary blob read from the persistent storage */
static const uint8_t* Deserialize(const uint8_t* p_in, size_t len,
HasPreset& preset);
};
} // namespace has
} // namespace le_audio
|
