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优化rtp重发列队性能

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This commit is contained in:
xiongziliang 2022-02-27 12:24:54 +08:00
parent 6707b13418
commit a0b464958c
2 changed files with 24 additions and 15 deletions
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38
webrtc/Nack.cpp
View File

@ -15,12 +15,17 @@ using namespace toolkit;
using namespace mediakit;
static constexpr uint32_t kMaxNackMS = 5 * 1000;
static constexpr uint32_t kRtpCacheCheckInterval = 100;
void NackList::pushBack(RtpPacket::Ptr rtp) {
auto seq = rtp->getSeq();
_nack_cache_seq.emplace_back(seq);
_nack_cache_pkt.emplace(seq, std::move(rtp));
while (getCacheMS() > kMaxNackMS) {
if (++_cache_ms_check < kRtpCacheCheckInterval) {
return;
}
_cache_ms_check = 0;
while (getCacheMS() >= kMaxNackMS) {
//需要清除部分nack缓存
popFront();
}
@ -57,23 +62,26 @@ RtpPacket::Ptr *NackList::getRtp(uint16_t seq) {
}
uint32_t NackList::getCacheMS() {
auto back_stamp = getRtpStamp(_nack_cache_seq.back());
if (back_stamp == -1) {
_nack_cache_seq.pop_back();
return 0;
}
while (_nack_cache_seq.size() > 2) {
auto back_stamp = getRtpStamp(_nack_cache_seq.back());
if (back_stamp == -1) {
_nack_cache_seq.pop_back();
continue;
}
auto front_stamp = getRtpStamp(_nack_cache_seq.front());
if (front_stamp == -1) {
_nack_cache_seq.pop_front();
return 0;
}
auto front_stamp = getRtpStamp(_nack_cache_seq.front());
if (front_stamp == -1) {
_nack_cache_seq.pop_front();
continue;
}
if (back_stamp >= front_stamp) {
return back_stamp - front_stamp;
if (back_stamp >= front_stamp) {
return back_stamp - front_stamp;
}
//很有可能回环了
return back_stamp + (UINT32_MAX - front_stamp);
}
//很有可能回环了
return back_stamp + (UINT32_MAX - front_stamp);
return 0;
}
int64_t NackList::getRtpStamp(uint16_t seq) {

1
webrtc/Nack.h
View File

@ -30,6 +30,7 @@ private:
mediakit::RtpPacket::Ptr *getRtp(uint16_t seq);
private:
int _cache_ms_check = 0;
std::deque<uint16_t> _nack_cache_seq;
std::unordered_map<uint16_t, mediakit::RtpPacket::Ptr> _nack_cache_pkt;
};