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Diffstat (limited to '')
-rw-r--r-- | third_party/libwebrtc/modules/video_coding/chain_diff_calculator.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/video_coding/chain_diff_calculator.h b/third_party/libwebrtc/modules/video_coding/chain_diff_calculator.h new file mode 100644 index 0000000000..bca7340c6f --- /dev/null +++ b/third_party/libwebrtc/modules/video_coding/chain_diff_calculator.h @@ -0,0 +1,46 @@ +/* + * Copyright (c) 2020 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 MODULES_VIDEO_CODING_CHAIN_DIFF_CALCULATOR_H_ +#define MODULES_VIDEO_CODING_CHAIN_DIFF_CALCULATOR_H_ + +#include <stdint.h> + +#include <vector> + +#include "absl/container/inlined_vector.h" +#include "absl/types/optional.h" + +namespace webrtc { + +// This class is thread compatible. +class ChainDiffCalculator { + public: + ChainDiffCalculator() = default; + ChainDiffCalculator(const ChainDiffCalculator&) = default; + ChainDiffCalculator& operator=(const ChainDiffCalculator&) = default; + + // Restarts chains, i.e. for position where chains[i] == true next chain_diff + // will be 0. Saves chains.size() as number of chains in the stream. + void Reset(const std::vector<bool>& chains); + + // Returns chain diffs based on flags if frame is part of the chain. + absl::InlinedVector<int, 4> From(int64_t frame_id, + const std::vector<bool>& chains); + + private: + absl::InlinedVector<int, 4> ChainDiffs(int64_t frame_id) const; + + absl::InlinedVector<absl::optional<int64_t>, 4> last_frame_in_chain_; +}; + +} // namespace webrtc + +#endif // MODULES_VIDEO_CODING_CHAIN_DIFF_CALCULATOR_H_ |