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Diffstat (limited to 'third_party/libwebrtc/api/audio_codecs/audio_codec_pair_id.h')
-rw-r--r-- | third_party/libwebrtc/api/audio_codecs/audio_codec_pair_id.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/audio_codecs/audio_codec_pair_id.h b/third_party/libwebrtc/api/audio_codecs/audio_codec_pair_id.h new file mode 100644 index 0000000000..b10f14ea66 --- /dev/null +++ b/third_party/libwebrtc/api/audio_codecs/audio_codec_pair_id.h @@ -0,0 +1,74 @@ +/* + * 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_ |