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合并pr:#1158

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This commit is contained in:
ziyue 2021-10-13 20:28:10 +08:00 committed by Johnny
parent 638ef8c731
commit 702c505a17
2 changed files with 119 additions and 100 deletions
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162
src/Rtcp/RtcpContext.cpp
View File

@ -14,14 +14,97 @@ using namespace toolkit;
namespace mediakit {
void RtcpContext::onRtp(uint16_t seq, uint32_t stamp, uint64_t ntp_stamp_ms, uint32_t sample_rate, size_t bytes) {
void RtcpContext::onRtp(uint16_t /*seq*/, uint32_t stamp, uint64_t ntp_stamp_ms, uint32_t /*sample_rate*/, size_t bytes) {
++_packets;
_bytes += bytes;
_last_rtp_stamp = stamp;
_last_ntp_stamp_ms = ntp_stamp_ms;
}
size_t RtcpContext::getExpectedPackets() const {
throw std::runtime_error("没有实现, rtp发送者无法统计应收包数");
}
size_t RtcpContext::getExpectedPacketsInterval() {
throw std::runtime_error("没有实现, rtp发送者无法统计应收包数");
}
size_t RtcpContext::getLost() {
throw std::runtime_error("没有实现, rtp发送者无法统计丢包率");
}
size_t RtcpContext::geLostInterval() {
throw std::runtime_error("没有实现, rtp发送者无法统计丢包率");
}
Buffer::Ptr RtcpContext::createRtcpSR(uint32_t rtcp_ssrc) {
throw std::runtime_error("没有实现, rtp接收者尝试发送sr包");
}
Buffer::Ptr RtcpContext::createRtcpRR(uint32_t rtcp_ssrc, uint32_t rtp_ssrc) {
throw std::runtime_error("没有实现, rtp发送者尝试发送rr包");
}
////////////////////////////////////////////////////////////////////////////////////
void RtcpContextForSend::onRtcp(RtcpHeader *rtcp) {
switch ((RtcpType) rtcp->pt) {
case RtcpType::RTCP_RR: {
auto rtcp_rr = (RtcpRR *) rtcp;
for (auto item : rtcp_rr->getItemList()) {
if (!item->last_sr_stamp) {
continue;
}
auto it = _sender_report_ntp.find(item->last_sr_stamp);
if (it == _sender_report_ntp.end()) {
continue;
}
//发送sr到收到rr之间的时间戳增量
auto ms_inc = getCurrentMillisecond() - it->second;
//rtp接收端收到sr包后，回复rr包的延时，已转换为毫秒
auto delay_ms = (uint64_t) item->delay_since_last_sr * 1000 / 65536;
auto rtt = (int) (ms_inc - delay_ms);
if (rtt >= 0) {
//rtt不可能小于0
_rtt[item->ssrc] = rtt;
//InfoL << "ssrc:" << item->ssrc << ",rtt:" << rtt;
}
}
break;
}
default: break;
}
}
uint32_t RtcpContextForSend::getRtt(uint32_t ssrc) const {
auto it = _rtt.find(ssrc);
if (it == _rtt.end()) {
return 0;
}
return it->second;
}
Buffer::Ptr RtcpContextForSend::createRtcpSR(uint32_t rtcp_ssrc) {
auto rtcp = RtcpSR::create(0);
rtcp->setNtpStamp(_last_ntp_stamp_ms);
rtcp->rtpts = htonl(_last_rtp_stamp);
rtcp->ssrc = htonl(rtcp_ssrc);
rtcp->packet_count = htonl((uint32_t) _packets);
rtcp->octet_count = htonl((uint32_t) _bytes);
//记录上次发送的sender report信息，用于后续统计rtt
auto last_sr_lsr = ((ntohl(rtcp->ntpmsw) & 0xFFFF) << 16) | ((ntohl(rtcp->ntplsw) >> 16) & 0xFFFF);
_sender_report_ntp[last_sr_lsr] = getCurrentMillisecond();
if (_sender_report_ntp.size() >= 5) {
//删除最早的sr rtcp
_sender_report_ntp.erase(_sender_report_ntp.begin());
}
return RtcpHeader::toBuffer(std::move(rtcp));
}
////////////////////////////////////////////////////////////////////////////////////
void RtcpContextForRecv::onRtp(uint16_t seq, uint32_t stamp, uint64_t ntp_stamp_ms, uint32_t sample_rate, size_t bytes) {
{
//接收者才做复杂的统计运算
@ -64,7 +147,7 @@ void RtcpContextForRecv::onRtp(uint16_t seq, uint32_t stamp, uint64_t ntp_stamp_
RtcpContext::onRtp(seq, stamp, ntp_stamp_ms, sample_rate, bytes);
}
void RtcpContext::onRtcp(RtcpHeader *rtcp) {
void RtcpContextForRecv::onRtcp(RtcpHeader *rtcp) {
switch ((RtcpType) rtcp->pt) {
case RtcpType::RTCP_SR: {
auto rtcp_sr = (RtcpSR *) rtcp;
@ -79,50 +162,14 @@ void RtcpContext::onRtcp(RtcpHeader *rtcp) {
_last_sr_ntp_sys = getCurrentMillisecond();
break;
}
case RtcpType::RTCP_RR: {
auto rtcp_rr = (RtcpRR *) rtcp;
for (auto item : rtcp_rr->getItemList()) {
if (!item->last_sr_stamp) {
continue;
}
auto it = _sender_report_ntp.find(item->last_sr_stamp);
if (it == _sender_report_ntp.end()) {
continue;
}
//发送sr到收到rr之间的时间戳增量
auto ms_inc = getCurrentMillisecond() - it->second;
//rtp接收端收到sr包后，回复rr包的延时，已转换为毫秒
auto delay_ms = (uint64_t) item->delay_since_last_sr * 1000 / 65536;
auto rtt = (int) (ms_inc - delay_ms);
if (rtt >= 0) {
//rtt不可能小于0
_rtt[item->ssrc] = rtt;
//InfoL << "ssrc:" << item->ssrc << ",rtt:" << rtt;
}
}
break;
}
default: break;
}
}
uint32_t RtcpContext::getRtt(uint32_t ssrc) const {
auto it = _rtt.find(ssrc);
if (it == _rtt.end()) {
return 0;
}
return it->second;
}
size_t RtcpContext::getExpectedPackets() const {
throw std::runtime_error("没有实现, rtp发送者无法统计应收包数");
}
size_t RtcpContextForRecv::getExpectedPackets() const {
return (_seq_cycles << 16) + _seq_max - _seq_base + 1;
}
size_t RtcpContext::getExpectedPacketsInterval() {
throw std::runtime_error("没有实现, rtp发送者无法统计应收包数");
}
size_t RtcpContextForRecv::getExpectedPacketsInterval() {
auto expected = getExpectedPackets();
auto ret = expected - _last_expected;
@ -130,17 +177,10 @@ size_t RtcpContextForRecv::getExpectedPacketsInterval() {
return ret;
}
size_t RtcpContext::getLost() {
throw std::runtime_error("没有实现, rtp发送者无法统计丢包率");
}
size_t RtcpContextForRecv::getLost() {
return getExpectedPackets() - _packets;
}
size_t RtcpContext::geLostInterval() {
throw std::runtime_error("没有实现, rtp发送者无法统计丢包率");
}
size_t RtcpContextForRecv::geLostInterval() {
auto lost = getLost();
auto ret = lost - _last_lost;
@ -148,34 +188,6 @@ size_t RtcpContextForRecv::geLostInterval() {
return ret;
}
Buffer::Ptr RtcpContext::createRtcpSR(uint32_t rtcp_ssrc) {
throw std::runtime_error("没有实现, rtp接收者尝试发送sr包");
}
Buffer::Ptr RtcpContextForSend::createRtcpSR(uint32_t rtcp_ssrc) {
auto rtcp = RtcpSR::create(0);
rtcp->setNtpStamp(_last_ntp_stamp_ms);
rtcp->rtpts = htonl(_last_rtp_stamp);
rtcp->ssrc = htonl(rtcp_ssrc);
rtcp->packet_count = htonl((uint32_t) _packets);
rtcp->octet_count = htonl((uint32_t) _bytes);
//记录上次发送的sender report信息，用于后续统计rtt
auto last_sr_lsr = ((ntohl(rtcp->ntpmsw) & 0xFFFF) << 16) | ((ntohl(rtcp->ntplsw) >> 16) & 0xFFFF);
_sender_report_ntp[last_sr_lsr] = getCurrentMillisecond();
if (_sender_report_ntp.size() >= 5) {
//删除最早的sr rtcp
_sender_report_ntp.erase(_sender_report_ntp.begin());
}
return RtcpHeader::toBuffer(std::move(rtcp));
}
Buffer::Ptr RtcpContext::createRtcpRR(uint32_t rtcp_ssrc, uint32_t rtp_ssrc) {
throw std::runtime_error("没有实现, rtp发送者尝试发送rr包");
}
Buffer::Ptr RtcpContextForRecv::createRtcpRR(uint32_t rtcp_ssrc, uint32_t rtp_ssrc) {
auto rtcp = RtcpRR::create(1);
rtcp->ssrc = htonl(rtcp_ssrc);

57
src/Rtcp/RtcpContext.h
View File

@ -36,7 +36,7 @@ public:
* 输入sr rtcp包
* @param rtcp 输入一个rtcp
*/
void onRtcp(RtcpHeader *rtcp);
virtual void onRtcp(RtcpHeader *rtcp) = 0;
/**
* 计算总丢包数
@ -63,13 +63,6 @@ public:
*/
virtual Buffer::Ptr createRtcpRR(uint32_t rtcp_ssrc, uint32_t rtp_ssrc);
/**
* 获取rtt
* @param ssrc rtp ssrc
* @return rtt,单位毫秒
*/
uint32_t getRtt(uint32_t ssrc) const;
/**
* 上次结果与本次结果间应收包数
*/
@ -88,24 +81,36 @@ protected:
//上次的rtp时间戳,毫秒
uint32_t _last_rtp_stamp = 0;
uint64_t _last_ntp_stamp_ms = 0;
//上次统计的丢包总数
size_t _last_lost = 0;
//上次统计应收rtp包总数
size_t _last_expected = 0;
//上次收到sr包时计算出的Last SR timestamp
uint32_t _last_sr_lsr = 0;
//上次收到sr时的系统时间戳,单位毫秒
uint64_t _last_sr_ntp_sys = 0;
map<uint32_t/*ssrc*/, uint32_t/*rtt*/> _rtt;
map<uint32_t/*last_sr_lsr*/, uint64_t/*ntp stamp*/> _sender_report_ntp;
};
class RtcpContextForSend : public RtcpContext {
public:
Buffer::Ptr createRtcpSR(uint32_t rtcp_ssrc) override;
void onRtcp(RtcpHeader *rtcp) override;
/**
* 获取rtt
* @param ssrc rtp ssrc
* @return rtt,单位毫秒
*/
uint32_t getRtt(uint32_t ssrc) const;
private:
map<uint32_t/*ssrc*/, uint32_t/*rtt*/> _rtt;
map<uint32_t/*last_sr_lsr*/, uint64_t/*ntp stamp*/> _sender_report_ntp;
};
class RtcpContextForRecv : public RtcpContext {
public:
void onRtp(uint16_t seq, uint32_t stamp, uint64_t ntp_stamp_ms, uint32_t sample_rate, size_t bytes) override;
Buffer::Ptr createRtcpRR(uint32_t rtcp_ssrc, uint32_t rtp_ssrc) override;
size_t getExpectedPackets() const override;
size_t getExpectedPacketsInterval() override;
size_t getLost() override;
size_t geLostInterval() override;
void onRtcp(RtcpHeader *rtcp) override;
private:
//时间戳抖动值
double _jitter = 0;
//第一个seq的值
@ -120,13 +125,15 @@ class RtcpContextForRecv : public RtcpContext {
uint16_t _last_rtp_seq = 0;
//上次的rtp的系统时间戳(毫秒)用于统计抖动
uint64_t _last_rtp_sys_stamp = 0;
public:
void onRtp(uint16_t seq, uint32_t stamp, uint64_t ntp_stamp_ms, uint32_t sample_rate, size_t bytes) override;
Buffer::Ptr createRtcpRR(uint32_t rtcp_ssrc, uint32_t rtp_ssrc) override;
size_t getExpectedPackets() const override;
size_t getExpectedPacketsInterval() override;
size_t getLost() override;
size_t geLostInterval() override;
//上次统计的丢包总数
size_t _last_lost = 0;
//上次统计应收rtp包总数
size_t _last_expected = 0;
//上次收到sr包时计算出的Last SR timestamp
uint32_t _last_sr_lsr = 0;
//上次收到sr时的系统时间戳,单位毫秒
uint64_t _last_sr_ntp_sys = 0;
};
}//namespace mediakit
#endif //ZLMEDIAKIT_RTCPCONTEXT_H