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nack/rtx支持多次重传，提高抗丢包率

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ziyue
2021-07-27 20:37:43 +08:00
parent 3840ff2a3f
commit c59a7a04c3
7 changed files with 206 additions and 40 deletions
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22
webrtc/Nack.h
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@@ -36,22 +36,40 @@ private:
class NackContext {
public:
using Ptr = std::shared_ptr<NackContext>;
using onNack = function<void(const FCI_NACK &nack)>;
//最大保留的rtp丢包状态个数
static constexpr auto kNackMaxSize = 100;
//rtp丢包状态最长保留时间
static constexpr auto kNackMaxMS = 3 * 1000;
//nack最多请求重传10次
static constexpr auto kNackMaxCount = 10;
NackContext() = default;
~NackContext() = default;
void received(uint16_t seq);
void received(uint16_t seq, bool is_rtx = false);
void setOnNack(onNack cb);
uint64_t reSendNack();
private:
void eraseFrontSeq();
void doNack(const FCI_NACK &nack);
void doNack(const FCI_NACK &nack, bool record_nack);
void recordNack(const FCI_NACK &nack);
void onRtx(uint16_t seq);
private:
int _rtt = 50;
onNack _cb;
set<uint16_t> _seq;
uint16_t _last_max_seq = 0;
struct NackStatus{
uint64_t first_stamp;
uint64_t update_stamp;
int nack_count = 0;
};
map<uint16_t/*seq*/, NackStatus > _nack_send_ntp;
};
#endif //ZLMEDIAKIT_NACK_H