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完善rtp ext处理相关逻辑

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This commit is contained in:
xiongziliang 2021-05-16 20:56:03 +08:00
parent bda378c340
commit a84bcec4aa
3 changed files with 29 additions and 19 deletions
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6
webrtc/Sdp.cpp
View File

@ -1412,7 +1412,8 @@ void RtcConfigure::RtcTrackConfigure::setDefaultSetting(TrackType type){
RtpExtType::csrc_audio_level,
RtpExtType::abs_send_time,
RtpExtType::transport_cc,
RtpExtType::sdes_mid,
//rtx重传rtp时，忽略sdes_mid类型的rtp ext,实测发现Firefox在接收rtx时，如果存在sdes_mid的ext,将导致无法播放
//RtpExtType::sdes_mid,
RtpExtType::sdes_rtp_stream_id,
RtpExtType::sdes_repaired_rtp_stream_id
};
@ -1425,7 +1426,8 @@ void RtcConfigure::RtcTrackConfigure::setDefaultSetting(TrackType type){
extmap = {
RtpExtType::abs_send_time,
RtpExtType::transport_cc,
RtpExtType::sdes_mid,
//rtx重传rtp时，忽略sdes_mid类型的rtp ext,实测发现Firefox在接收rtx时，如果存在sdes_mid的ext,将导致无法播放
//RtpExtType::sdes_mid,
RtpExtType::sdes_rtp_stream_id,
RtpExtType::sdes_repaired_rtp_stream_id,
RtpExtType::video_timing,

35
webrtc/WebRtcTransport.cpp
View File

@ -668,24 +668,30 @@ void WebRtcTransportImp::onRtcp(const char *buf, size_t len) {
///////////////////////////////////////////////////////////////////
static void setExtType(RtpExt &ext, uint8_t tp) {}
static void setExtType(RtpExt &ext, RtpExtType tp) {
ext.setType(tp);
}
template<typename Type>
static void changeRtpExtId(const RtpHeader *header, const Type &map) {
void WebRtcTransportImp::changeRtpExtId(const RtpHeader *header, bool is_recv, bool is_rtx) const{
auto ext_map = RtpExt::getExtValue(header);
for (auto &pr : ext_map) {
auto it = map.find((typename Type::key_type) (pr.first));
if (it == map.end()) {
WarnL << "未处理的rtp ext, 类型不识别:" << (int) pr.first;
if (is_recv) {
auto it = _rtp_ext_id_to_type.find(pr.first);
if (it == _rtp_ext_id_to_type.end()) {
WarnL << "接收rtp时,忽略不识别的rtp ext, id=" << (int) pr.first;
pr.second.clearExt();
continue;
}
setExtType(pr.second, it->first);
setExtType(pr.second, it->second);
pr.second.setType(it->second);
//重新赋值ext id为 ext type，作为后面处理ext的统一中间类型
pr.second.setExtId((uint8_t) it->second);
} else {
pr.second.setType((RtpExtType) pr.first);
auto it = _rtp_ext_type_to_id.find((RtpExtType) pr.first);
if (it == _rtp_ext_type_to_id.end()) {
WarnL << "发送rtp时, 忽略不被客户端支持rtp ext:" << pr.second.dumpString();
pr.second.clearExt();
continue;
}
//重新赋值ext id为客户端sdp声明的类型
pr.second.setExtId(it->second);
}
}
}
@ -726,7 +732,7 @@ void WebRtcTransportImp::onRtp_l(const char *buf, size_t len, bool rtx) {
info->rtcp_context_recv->onRtp(seq, stamp_ms, len);
}
//修改ext id至统一
changeRtpExtId(rtp, _rtp_ext_id_to_type);
changeRtpExtId(rtp, true);
//解析并排序rtp
info->receiver->inputRtp(info->media->type, info->plan_rtp->sample_rate, (uint8_t *) buf, len);
return;
@ -808,14 +814,15 @@ void WebRtcTransportImp::onSendRtp(const RtpPacket::Ptr &rtp, bool flush, bool r
void WebRtcTransportImp::onBeforeEncryptRtp(const char *buf, size_t &len, void *ctx) {
auto pr = (pair<bool/*rtx*/, RtpPayloadInfo *> *) ctx;
auto header = (RtpHeader *) buf;
changeRtpExtId(header, _rtp_ext_type_to_id);
if (!pr->first || !pr->second->plan_rtx) {
//普通的rtp,或者不支持rtx, 修改目标pt和ssrc
changeRtpExtId(header, false, false);
header->pt = pr->second->plan_rtp->pt;
header->ssrc = htonl(pr->second->answer_ssrc_rtp);
} else {
//重传的rtp, rtx
changeRtpExtId(header, false, true);
header->pt = pr->second->plan_rtx->pt;
if (pr->second->answer_ssrc_rtx) {
//有rtx单独的ssrc,有些情况下，浏览器支持rtx，但是未指定rtx单独的ssrc

1
webrtc/WebRtcTransport.h
View File

@ -338,6 +338,7 @@ private:
SdpAttrCandidate::Ptr getIceCandidate() const;
bool canSendRtp() const;
bool canRecvRtp() const;
void changeRtpExtId(const RtpHeader *header, bool is_recv, bool is_rtx = false) const;
class RtpPayloadInfo {
public: