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代码优化: _last_seq_out -> next_seq, (#4069)

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mtdxc 2024-12-20 11:15:15 +08:00 committed by GitHub
parent 8bf48ed333
commit cffd98042b
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1 changed files with 16 additions and 20 deletions
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36
src/Rtsp/RtpReceiver.h
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@ -68,10 +68,9 @@ public:
// 记录第一个seq [AUTO-TRANSLATED:410c831f]
// Record the first seq
_started = true;
_last_seq_out = seq - 1;
_next_seq = seq;
}
auto next_seq = static_cast<SEQ>(_last_seq_out + 1);
if (seq == next_seq) {
if (seq == _next_seq) {
// 收到下一个seq [AUTO-TRANSLATED:44960fea]
// Receive the next seq
output(seq, std::move(packet));
@ -82,14 +81,14 @@ public:
return;
}
if (seq < next_seq && !mayLooped(next_seq, seq)) {
if (seq < _next_seq && !mayLooped(_next_seq, seq)) {
// 无回环风险, 缓存seq回退包 [AUTO-TRANSLATED:4200dd1b]
// No loop risk, cache seq rollback packets
_pkt_drop_cache_map.emplace(seq, std::move(packet));
if (_pkt_drop_cache_map.size() > _max_distance || _ticker.elapsedTime() > _max_buffer_ms) {
// seq回退包太多，可能源端重置seq计数器，这部分数据需要输出 [AUTO-TRANSLATED:d31aead7]
// Too many seq rollback packets, the source may reset the seq counter, this part of data needs to be output
forceFlush(next_seq);
forceFlush(_next_seq);
// 旧的seq计数器的数据清空后把新seq计数器的数据赋值给排序列队 [AUTO-TRANSLATED:f69f864c]
// After clearing the data of the old seq counter, assign the data of the new seq counter to the sorting queue
_pkt_sort_cache_map = std::move(_pkt_drop_cache_map);
@ -100,13 +99,13 @@ public:
_pkt_sort_cache_map.emplace(seq, std::move(packet));
if (needForceFlush(seq)) {
forceFlush(next_seq);
forceFlush(_next_seq);
}
}
void flush() {
if (!_pkt_sort_cache_map.empty()) {
forceFlush(static_cast<SEQ>(_last_seq_out + 1));
forceFlush(_next_seq);
_pkt_sort_cache_map.clear();
}
}
@ -120,11 +119,10 @@ public:
private:
SEQ distance(SEQ seq) {
SEQ ret;
auto next_seq = static_cast<SEQ>(_last_seq_out + 1);
if (seq > next_seq) {
ret = seq - next_seq;
if (seq > _next_seq) {
ret = seq - _next_seq;
} else {
ret = next_seq - seq;
ret = _next_seq - seq;
}
if (ret > SEQ_MAX >> 1) {
return SEQ_MAX - ret;
@ -171,9 +169,8 @@ private:
if (_pkt_sort_cache_map.empty()) {
return;
}
auto next_seq = static_cast<SEQ>(_last_seq_out + 1);
auto it = _pkt_sort_cache_map.lower_bound(next_seq);
if (!mayLooped(next_seq, next_seq)) {
auto it = _pkt_sort_cache_map.lower_bound(_next_seq);
if (!mayLooped(_next_seq, _next_seq)) {
// 无回环风险, 清空 < next_seq的值 [AUTO-TRANSLATED:10c77bf9]
// No loop risk, clear values less than next_seq
it = _pkt_sort_cache_map.erase(_pkt_sort_cache_map.begin(), it);
@ -182,7 +179,7 @@ private:
while (it != _pkt_sort_cache_map.end()) {
// 找到下一个包 [AUTO-TRANSLATED:8e20ab9f]
// Find the next packet
if (it->first == static_cast<SEQ>(_last_seq_out + 1)) {
if (it->first == _next_seq) {
it = popIterator(it);
continue;
}
@ -196,14 +193,13 @@ private:
}
void output(SEQ seq, T packet) {
auto next_seq = static_cast<SEQ>(_last_seq_out + 1);
if (seq != next_seq) {
WarnL << "packet dropped: " << next_seq << " -> " << static_cast<SEQ>(seq - 1)
if (seq != _next_seq) {
WarnL << "packet dropped: " << _next_seq << " -> " << static_cast<SEQ>(seq - 1)
<< ", latest seq: " << _latest_seq
<< ", jitter buffer size: " << _pkt_sort_cache_map.size()
<< ", jitter buffer ms: " << _ticker.elapsedTime();
}
_last_seq_out = seq;
_next_seq = static_cast<SEQ>(seq + 1);
_cb(seq, std::move(packet));
_ticker.resetTime();
}
@ -227,7 +223,7 @@ private:
SEQ _latest_seq = 0;
// 下次应该输出的SEQ [AUTO-TRANSLATED:e757a4fa]
// The next SEQ to be output
SEQ _last_seq_out = 0;
SEQ _next_seq = 0;
// pkt排序缓存，根据seq排序 [AUTO-TRANSLATED:3787f9a6]
// pkt sorting cache, sorted by seq
std::map<SEQ, T> _pkt_sort_cache_map;