Mirror/ZLMediaKit
1
0
Fork 0
mirror of https://github.com/ZLMediaKit/ZLMediaKit.git synced 2026-06-19 06:42:21 +08:00
Code Issues Packages Projects Releases Wiki Activity

AI automatically translates all comments in the code into English (#3917)

Browse Source
This commit is contained in:
alex
2024-09-19 14:53:50 +08:00
committed by GitHub
parent 046de691cb
commit 4152dcd409
279 changed files with 10602 additions and 3038 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
src/Rtcp/RtcpContext.cpp
View File

@@ -64,13 +64,16 @@ void RtcpContextForSend::onRtcp(RtcpHeader *rtcp) {
if (it == _sender_report_ntp.end()) {
continue;
}
// 发送sr到收到rr之间的时间戳增量
// 发送sr到收到rr之间的时间戳增量 [AUTO-TRANSLATED:da014bf1]
// Timestamp increment between sending sr and receiving rr
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
// rtp接收端收到sr包后，回复rr包的延时，已转换为毫秒 [AUTO-TRANSLATED:bfab8622]
// Delay of the rtp receiver replying to the rr packet after receiving the sr packet, converted to milliseconds
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不可能小于0 [AUTO-TRANSLATED:34914014]
// RTT cannot be less than 0
_rtt[item->ssrc] = rtt;
// InfoL << "ssrc:" << item->ssrc << ",rtt:" << rtt;
}
@@ -111,11 +114,13 @@ Buffer::Ptr RtcpContextForSend::createRtcpSR(uint32_t 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
// 记录上次发送的sender report信息，用于后续统计rtt [AUTO-TRANSLATED:1d22d2c8]
// Record the last sent sender report information for subsequent RTT statistics
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
// 删除最早的sr rtcp [AUTO-TRANSLATED:2457e08d]
// Delete the earliest sr rtcp
_sender_report_ntp.erase(_sender_report_ntp.begin());
}
@@ -141,7 +146,8 @@ toolkit::Buffer::Ptr RtcpContextForSend::createRtcpXRDLRR(uint32_t rtcp_ssrc, ui
rtcp->items.dlrr = 0;
WarnL;
} else {
// now - Last SR time,单位毫秒
// now - Last SR time,单位毫秒 [AUTO-TRANSLATED:cc449199]
// now - Last SR time, in milliseconds
auto delay = getCurrentMillisecond() - _xr_rrtr_recv_sys_stamp[rtp_ssrc];
// in units of 1/65536 seconds
auto dlsr = (uint32_t)(delay / 1000.0f * 65536);
@@ -155,38 +161,46 @@ toolkit::Buffer::Ptr RtcpContextForSend::createRtcpXRDLRR(uint32_t rtcp_ssrc, ui
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
// 接收者才做复杂的统计运算 [AUTO-TRANSLATED:853c68e0]
// The receiver performs complex statistical calculations
auto sys_stamp = getCurrentMillisecond();
if (_last_rtp_sys_stamp) {
// 计算时间戳抖动值
// 计算时间戳抖动值 [AUTO-TRANSLATED:cd3571b4]
// Calculate the timestamp jitter value
double diff = double(
(int64_t(sys_stamp) - int64_t(_last_rtp_sys_stamp)) * (sample_rate / double(1000.0))
- (int64_t(stamp) - int64_t(_last_rtp_stamp)));
if (diff < 0) {
diff = -diff;
}
// 抖动单位为采样次数
// 抖动单位为采样次数 [AUTO-TRANSLATED:b713633a]
// Jitter unit is the number of samples
_jitter += (diff - _jitter) / 16.0;
} else {
_jitter = 0;
}
if (_last_rtp_seq > 0xFF00 && seq < 0xFF && (!_seq_cycles || _packets - _last_cycle_packets > 0x1FFF)) {
// 上次seq大于0xFF00且本次seq小于0xFF，
// 且未发生回环或者距离上次回环间隔超过0x1FFF个包，则认为回环
// 上次seq大于0xFF00且本次seq小于0xFF， [AUTO-TRANSLATED:82dd69fa]
// Last seq is greater than 0xFF00 and this seq is less than 0xFF,
// 且未发生回环或者距离上次回环间隔超过0x1FFF个包，则认为回环 [AUTO-TRANSLATED:2907b595]
// and no loopback occurs or the interval between the last loopback is greater than 0x1FFF packets, then it is considered a loopback
++_seq_cycles;
_last_cycle_packets = _packets;
_seq_max = seq;
} else if (seq > _seq_max) {
// 本次回环前最大seq
// 本次回环前最大seq [AUTO-TRANSLATED:c02f6a87]
// Maximum seq before this loopback
_seq_max = seq;
}
if (!_seq_base) {
// 记录第一个rtp的seq
// 记录第一个rtp的seq [AUTO-TRANSLATED:ce2bb7d7]
// Record the seq of the first rtp
_seq_base = seq;
} else if (!_seq_cycles && seq < _seq_base) {
// 未发生回环，那么取最新的seq为基准seq
// 未发生回环，那么取最新的seq为基准seq [AUTO-TRANSLATED:721b37fc]
// If no loopback occurs, then take the latest seq as the base seq
_seq_base = seq;
}
@@ -258,7 +272,8 @@ Buffer::Ptr RtcpContextForRecv::createRtcpRR(uint32_t rtcp_ssrc, uint32_t rtp_ss
item->jitter = htonl(uint32_t(_jitter));
item->last_sr_stamp = htonl(_last_sr_lsr);
// now - Last SR time,单位毫秒
// now - Last SR time,单位毫秒 [AUTO-TRANSLATED:cc449199]
// now - Last SR time, in milliseconds
auto delay = getCurrentMillisecond() - _last_sr_ntp_sys;
// in units of 1/65536 seconds
auto dlsr = (uint32_t)(delay / 1000.0f * 65536);