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sdp 支持ssrc-group属性

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This commit is contained in:
xiongziliang
2021-03-28 23:31:21 +08:00
parent 81f29fea61
commit 6fa385f3a1
2 changed files with 105 additions and 33 deletions
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57
webrtc/Sdp.cpp
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@@ -21,31 +21,31 @@ void registerSdpItem(){
class DirectionInterface {
public:
virtual RtpDirection getDirection() = 0;
virtual RtpDirection getDirection() const = 0;
};
class SdpDirectionSendonly : public SdpItem, public DirectionInterface{
public:
const char* getKey() override { return getRtpDirectionString(getDirection());}
RtpDirection getDirection() override {return RtpDirection::sendonly;}
const char* getKey() const override { return getRtpDirectionString(getDirection());}
RtpDirection getDirection() const override {return RtpDirection::sendonly;}
};
class SdpDirectionRecvonly : public SdpItem, public DirectionInterface{
public:
const char* getKey() override { return getRtpDirectionString(getDirection());}
RtpDirection getDirection() override {return RtpDirection::recvonly;}
const char* getKey() const override { return getRtpDirectionString(getDirection());}
RtpDirection getDirection() const override {return RtpDirection::recvonly;}
};
class SdpDirectionSendrecv : public SdpItem, public DirectionInterface{
public:
const char* getKey() override { return getRtpDirectionString(getDirection());}
RtpDirection getDirection() override {return RtpDirection::sendrecv;}
const char* getKey() const override { return getRtpDirectionString(getDirection());}
RtpDirection getDirection() const override {return RtpDirection::sendrecv;}
};
class SdpDirectionInactive : public SdpItem, public DirectionInterface{
public:
const char* getKey() override { return getRtpDirectionString(getDirection());}
RtpDirection getDirection() override {return RtpDirection::inactive;}
const char* getKey() const override { return getRtpDirectionString(getDirection());}
RtpDirection getDirection() const override {return RtpDirection::inactive;}
};
static bool registerAllItem(){
@@ -69,6 +69,7 @@ static bool registerAllItem(){
registerSdpItem<SdpAttrRtcp>();
registerSdpItem<SdpAttrIceUfrag>();
registerSdpItem<SdpAttrIcePwd>();
registerSdpItem<SdpAttrIceOption>();
registerSdpItem<SdpAttrFingerprint>();
registerSdpItem<SdpAttrSetup>();
registerSdpItem<SdpAttrMid>();
@@ -77,6 +78,7 @@ static bool registerAllItem(){
registerSdpItem<SdpAttrRtcpFb>();
registerSdpItem<SdpAttrFmtp>();
registerSdpItem<SdpAttrSSRC>();
registerSdpItem<SdpAttrSSRCGroup>();
registerSdpItem<SdpAttrSctpMap>();
registerSdpItem<SdpAttrCandidate>();
registerSdpItem<SdpDirectionSendonly>();
@@ -230,6 +232,8 @@ RtpDirection RtcMedia::getDirection() const{
//////////////////////////////////////////////////////////////////////////////////////////
#define SDP_THROW() throw std::invalid_argument(StrPrinter << "解析sdp " << getKey() << " 字段失败:" << str)
#define SDP_THROW2() throw std::invalid_argument(StrPrinter << "生成sdp " << getKey() << " 字段失败")
void SdpTime::parse(const string &str) {
if (sscanf(str.data(), "%" PRIu64 " %" PRIu64, &start, &stop) != 2) {
SDP_THROW();
@@ -555,6 +559,41 @@ string SdpAttrSSRC::toString() const {
return SdpItem::toString();
}
void SdpAttrSSRCGroup::parse(const string &str) {
auto vec = split(str, " ");
if (vec.size() == 3) {
if (vec[0] != "FID") {
SDP_THROW();
}
type = std::move(vec[0]);
u.fid.rtp_ssrc = atoi(vec[1].data());
u.fid.rtx_ssrc = atoi(vec[2].data());
} else if (vec.size() == 4) {
if (vec[0] != "SIM") {
SDP_THROW();
}
type = std::move(vec[0]);
u.sim.rtp_ssrc_low = atoi(vec[1].data());
u.sim.rtp_ssrc_mid = atoi(vec[2].data());
u.sim.rtp_ssrc_high = atoi(vec[3].data());
} else {
SDP_THROW();
}
}
string SdpAttrSSRCGroup::toString() const {
if (value.empty()) {
if (type == "FID") {
value = type + " " + to_string(u.fid.rtp_ssrc) + " " + to_string(u.fid.rtx_ssrc);
} else if (type == "SIM") {
value = type + " " + to_string(u.sim.rtp_ssrc_low) + " " + to_string(u.sim.rtp_ssrc_mid) + " " + to_string(u.sim.rtp_ssrc_high);
} else {
SDP_THROW2();
}
}
return SdpItem::toString();
}
void SdpAttrSctpMap::parse(const string &str) {
char subtypes_buf[64] = {0};
if (3 == sscanf(str.data(), "%" PRIu16 " %63[^ ] %" PRId32, &port, subtypes_buf, &streams)) {