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Diffstat (limited to 'third_party/libwebrtc/video/unique_timestamp_counter.h')
-rw-r--r-- | third_party/libwebrtc/video/unique_timestamp_counter.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/third_party/libwebrtc/video/unique_timestamp_counter.h b/third_party/libwebrtc/video/unique_timestamp_counter.h new file mode 100644 index 0000000000..5dfb758bce --- /dev/null +++ b/third_party/libwebrtc/video/unique_timestamp_counter.h @@ -0,0 +1,44 @@ +/* + * Copyright (c) 2019 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 VIDEO_UNIQUE_TIMESTAMP_COUNTER_H_ +#define VIDEO_UNIQUE_TIMESTAMP_COUNTER_H_ + +#include <cstdint> +#include <memory> +#include <set> + +namespace webrtc { + +// Counts number of uniquely seen frames (aka pictures, aka temporal units) +// identified by their rtp timestamp. +class UniqueTimestampCounter { + public: + UniqueTimestampCounter(); + UniqueTimestampCounter(const UniqueTimestampCounter&) = delete; + UniqueTimestampCounter& operator=(const UniqueTimestampCounter&) = delete; + ~UniqueTimestampCounter() = default; + + void Add(uint32_t timestamp); + // Returns number of different `timestamp` passed to the UniqueCounter. + int GetUniqueSeen() const { return unique_seen_; } + + private: + int unique_seen_ = 0; + // Stores several last seen unique values for quick search. + std::set<uint32_t> search_index_; + // The same unique values in the circular buffer in the insertion order. + std::unique_ptr<uint32_t[]> latest_; + // Last inserted value for optimization purpose. + int64_t last_ = -1; +}; + +} // namespace webrtc + +#endif // VIDEO_UNIQUE_TIMESTAMP_COUNTER_H_ |