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