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61bc0d1ed3
to convert flags which chains a video frame part of into chain_diffs Bug: webrtc:10342 Change-Id: I6fb899eae934078223b101c9f85e2ac101980d4c Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/175108 Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Philip Eliasson <philipel@webrtc.org> Cr-Commit-Position: refs/heads/master@{#31306}
46 lines
1.5 KiB
C++
46 lines
1.5 KiB
C++
/*
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* Copyright (c) 2020 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 MODULES_VIDEO_CODING_CHAIN_DIFF_CALCULATOR_H_
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#define MODULES_VIDEO_CODING_CHAIN_DIFF_CALCULATOR_H_
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#include <stdint.h>
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#include <vector>
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#include "absl/container/inlined_vector.h"
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#include "absl/types/optional.h"
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namespace webrtc {
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// This class is thread compatible.
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class ChainDiffCalculator {
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public:
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ChainDiffCalculator() = default;
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ChainDiffCalculator(const ChainDiffCalculator&) = default;
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ChainDiffCalculator& operator=(const ChainDiffCalculator&) = default;
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// Restarts chains, i.e. for position where chains[i] == true next chain_diff
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// will be 0. Saves chains.size() as number of chains in the stream.
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void Reset(const std::vector<bool>& chains);
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// Returns chain diffs based on flags if frame is part of the chain.
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absl::InlinedVector<int, 4> From(int64_t frame_id,
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const std::vector<bool>& chains);
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private:
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absl::InlinedVector<int, 4> ChainDiffs(int64_t frame_id) const;
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absl::InlinedVector<absl::optional<int64_t>, 4> last_frame_in_chain_;
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};
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} // namespace webrtc
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#endif // MODULES_VIDEO_CODING_CHAIN_DIFF_CALCULATOR_H_
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