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/*
* 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 MODULES_VIDEO_CODING_UTILITY_DECODED_FRAMES_HISTORY_H_
#define MODULES_VIDEO_CODING_UTILITY_DECODED_FRAMES_HISTORY_H_
#include <stdint.h>
#include <cstddef>
#include <optional>
#include <vector>
namespace webrtc {
namespace video_coding {
class DecodedFramesHistory {
public:
// window_size - how much frames back to the past are actually remembered.
explicit DecodedFramesHistory(size_t window_size);
~DecodedFramesHistory();
// Called for each decoded frame. Assumes frame id's are non-decreasing.
void InsertDecoded(int64_t frame_id, uint32_t timestamp);
// Query if the following (frame_id, spatial_id) pair was inserted before.
// Should be at most less by window_size-1 than the last inserted frame id.
bool WasDecoded(int64_t frame_id) const;
void Clear();
std::optional<int64_t> GetLastDecodedFrameId() const;
std::optional<uint32_t> GetLastDecodedFrameTimestamp() const;
private:
int FrameIdToIndex(int64_t frame_id) const;
std::vector<bool> buffer_;
std::optional<int64_t> last_frame_id_;
std::optional<int64_t> last_decoded_frame_;
std::optional<uint32_t> last_decoded_frame_timestamp_;
};
} // namespace video_coding
} // namespace webrtc
#endif // MODULES_VIDEO_CODING_UTILITY_DECODED_FRAMES_HISTORY_H_
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