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/*
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* Copyright (c) 2021 The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/ZLMediaKit/ZLMediaKit).
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*
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* Use of this source code is governed by MIT-like license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef ZLMEDIAKIT_TWCCCONTEXT_H
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#define ZLMEDIAKIT_TWCCCONTEXT_H
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#include <stdint.h>
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#include <map>
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#include <functional>
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#include <string>
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namespace mediakit {
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class TwccContext {
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public:
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using onSendTwccCB = std::function<void(uint32_t ssrc, std::string fci)>;
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// 每个twcc rtcp包最多表明的rtp ext seq增量 [AUTO-TRANSLATED:530d1e35]
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// Maximum RTP ext seq increment indicated by each twcc rtcp packet
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static constexpr size_t kMaxSeqSize = 20;
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// 每个twcc rtcp包发送的最大时间间隔，单位毫秒 [AUTO-TRANSLATED:e45656da]
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// Maximum time interval for sending each twcc rtcp packet, in milliseconds
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static constexpr size_t kMaxTimeDelta = 256;
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void onRtp(uint32_t ssrc, uint16_t twcc_ext_seq, uint64_t stamp_ms);
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void setOnSendTwccCB(onSendTwccCB cb);
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private:
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void onSendTwcc(uint32_t ssrc);
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bool needSendTwcc() const;
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int checkSeqStatus(uint16_t twcc_ext_seq) const;
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void clearStatus();
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private:
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uint64_t _min_stamp = 0;
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uint64_t _max_stamp;
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std::map<uint32_t /*twcc_ext_seq*/, uint64_t/*recv time in ms*/> _rtp_recv_status;
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uint8_t _twcc_pkt_count = 0;
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onSendTwccCB _cb;
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};
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}// namespace mediakit
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#endif //ZLMEDIAKIT_TWCCCONTEXT_H
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