mirror of
https://gitee.com/xia-chu/ZLMediaKit.git
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122 lines
3.0 KiB
C++
122 lines
3.0 KiB
C++
/*
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* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
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*
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* Use of this source code is governed by MIT 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_RTCPCONTEXT_H
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#define ZLMEDIAKIT_RTCPCONTEXT_H
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#include <stdint.h>
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#include <stddef.h>
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#include "Rtcp.h"
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namespace mediakit {
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class RtcpContext {
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public:
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using Ptr = std::shared_ptr<RtcpContext>;
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/**
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* 创建rtcp上下文
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* @param sample_rate 音频采用率，视频一般为90000
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* @param is_receiver 是否为rtp接收者，接收者更消耗性能
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*/
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RtcpContext(uint32_t sample_rate, bool is_receiver);
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/**
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* 输出或输入rtp时调用
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* @param seq rtp的seq
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* @param stamp rtp的时间戳，单位毫秒
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* @param bytes rtp数据长度
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*/
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void onRtp(uint16_t seq, uint32_t stamp, size_t bytes);
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/**
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* 输入sr rtcp包
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* @param rtcp 输入一个rtcp
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*/
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void onRtcp(RtcpHeader *rtcp);
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/**
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* 计算总丢包数
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*/
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size_t getLost();
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/**
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* 返回理应收到的rtp数
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*/
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size_t getExpectedPackets() const;
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/**
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* 创建SR rtcp包
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* @param rtcp_ssrc rtcp的ssrc
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* @return rtcp包
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*/
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Buffer::Ptr createRtcpSR(uint32_t rtcp_ssrc);
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/**
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* 创建RR rtcp包
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* @param rtcp_ssrc rtcp的ssrc
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* @param rtp_ssrc rtp的ssrc
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* @return rtcp包
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*/
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Buffer::Ptr createRtcpRR(uint32_t rtcp_ssrc, uint32_t rtp_ssrc);
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/**
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* 清空状态
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*/
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void clear();
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private:
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/**
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* 上次结果与本次结果间应收包数
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*/
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size_t getExpectedPacketsInterval();
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/**
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* 上次结果与本次结果间丢包个数
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*/
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size_t geLostInterval();
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private:
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//是否为接收者
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bool _is_receiver;
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//时间戳抖动值
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double _jitter = 0;
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//视频默认90000,音频为采样率
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uint32_t _sample_rate;
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//收到或发送的rtp的字节数
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size_t _bytes = 0;
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//收到或发送的rtp的个数
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size_t _packets = 0;
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//第一个seq的值
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uint16_t _seq_base = 0;
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//rtp最大seq
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uint16_t _seq_max = 0;
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//rtp回环次数
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uint16_t _seq_cycles = 0;
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//上次回环发生时，记录的rtp包数
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size_t _last_cycle_packets = 0;
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//上次的seq
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uint16_t _last_rtp_seq = 0;
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//上次的rtp时间戳,毫秒
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uint32_t _last_rtp_stamp = 0;
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//上次的rtp的系统时间戳(毫秒)用于统计抖动
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uint64_t _last_rtp_sys_stamp = 0;
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//上次统计的丢包总数
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size_t _last_lost = 0;
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//上次统计应收rtp包总数
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size_t _last_expected = 0;
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//上次收到sr包时计算出的Last SR timestamp
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uint32_t _last_sr_lsr = 0;
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//上次收到sr时的系统时间戳,单位毫秒
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uint64_t _last_sr_ntp_sys = 0;
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};
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}//namespace mediakit
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#endif //ZLMEDIAKIT_RTCPCONTEXT_H
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