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
|
/*
* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef API_AUDIO_CODECS_AUDIO_CODEC_PAIR_ID_H_
#define API_AUDIO_CODECS_AUDIO_CODEC_PAIR_ID_H_
#include <stdint.h>
#include <utility>
namespace webrtc {
class AudioCodecPairId final {
public:
// Copyable, but not default constructible.
AudioCodecPairId() = delete;
AudioCodecPairId(const AudioCodecPairId&) = default;
AudioCodecPairId(AudioCodecPairId&&) = default;
AudioCodecPairId& operator=(const AudioCodecPairId&) = default;
AudioCodecPairId& operator=(AudioCodecPairId&&) = default;
friend void swap(AudioCodecPairId& a, AudioCodecPairId& b) {
using std::swap;
swap(a.id_, b.id_);
}
// Creates a new ID, unequal to any previously created ID.
static AudioCodecPairId Create();
// IDs can be tested for equality.
friend bool operator==(AudioCodecPairId a, AudioCodecPairId b) {
return a.id_ == b.id_;
}
friend bool operator!=(AudioCodecPairId a, AudioCodecPairId b) {
return a.id_ != b.id_;
}
// Comparisons. The ordering of ID values is completely arbitrary, but
// stable, so it's useful e.g. if you want to use IDs as keys in an ordered
// map.
friend bool operator<(AudioCodecPairId a, AudioCodecPairId b) {
return a.id_ < b.id_;
}
friend bool operator<=(AudioCodecPairId a, AudioCodecPairId b) {
return a.id_ <= b.id_;
}
friend bool operator>=(AudioCodecPairId a, AudioCodecPairId b) {
return a.id_ >= b.id_;
}
friend bool operator>(AudioCodecPairId a, AudioCodecPairId b) {
return a.id_ > b.id_;
}
// Returns a numeric representation of the ID. The numeric values are
// completely arbitrary, but stable, collision-free, and reasonably evenly
// distributed, so they are e.g. useful as hash values in unordered maps.
uint64_t NumericRepresentation() const { return id_; }
private:
explicit AudioCodecPairId(uint64_t id) : id_(id) {}
uint64_t id_;
};
} // namespace webrtc
#endif // API_AUDIO_CODECS_AUDIO_CODEC_PAIR_ID_H_
|
