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This is a space efficient way to store more records about decoded frames, which is needed for long term references. Bug: webrtc:9710 Change-Id: I051d59d34a966d48db011142466d9cd15304b7d9 Reviewed-on: https://webrtc-review.googlesource.com/c/116792 Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org> Reviewed-by: Philip Eliasson <philipel@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26240}
60 lines
2 KiB
C++
60 lines
2 KiB
C++
/*
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* Copyright (c) 2019 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_UTILITY_DECODED_FRAMES_HISTORY_H_
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#define MODULES_VIDEO_CODING_UTILITY_DECODED_FRAMES_HISTORY_H_
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#include <stdint.h>
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#include <bitset>
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#include <vector>
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#include "absl/types/optional.h"
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#include "api/video/encoded_frame.h"
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namespace webrtc {
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namespace video_coding {
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class DecodedFramesHistory {
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public:
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// window_size - how much frames back to the past are actually remembered.
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explicit DecodedFramesHistory(size_t window_size);
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~DecodedFramesHistory();
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// Called for each decoded frame. Assumes picture id's are non-decreasing.
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void InsertDecoded(const VideoLayerFrameId& frameid, uint32_t timestamp);
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// Query if the following (picture_id, spatial_id) pair was inserted before.
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// Should be at most less by window_size-1 than the last inserted picture id.
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bool WasDecoded(const VideoLayerFrameId& frameid);
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void Clear();
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absl::optional<VideoLayerFrameId> GetLastDecodedFrameId();
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absl::optional<uint32_t> GetLastDecodedFrameTimestamp();
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private:
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struct LayerHistory {
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LayerHistory();
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~LayerHistory();
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// Cyclic bitset buffer. Stores last known |window_size| bits.
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// last_stored_index is the last actually stored bit. Previous
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// |window_size-1| bits are also in the memory. Value for i-th bit is at
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// buffer[i % window_size].
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std::vector<bool> buffer;
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int64_t last_stored_index;
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};
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const int window_size_;
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std::vector<LayerHistory> layers_;
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absl::optional<VideoLayerFrameId> last_decoded_frame_;
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absl::optional<uint32_t> last_decoded_frame_timestamp_;
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};
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} // namespace video_coding
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} // namespace webrtc
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#endif // MODULES_VIDEO_CODING_UTILITY_DECODED_FRAMES_HISTORY_H_
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