mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-25 20:27:34 +08:00
sdp 支持ssrc-group属性
This commit is contained in:
xiongziliang
parent
81f29fea61
commit
6fa385f3a1
@ -21,31 +21,31 @@ void registerSdpItem(){
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class DirectionInterface {
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public:
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virtual RtpDirection getDirection() = 0;
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virtual RtpDirection getDirection() const = 0;
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};
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class SdpDirectionSendonly : public SdpItem, public DirectionInterface{
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public:
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const char* getKey() override { return getRtpDirectionString(getDirection());}
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RtpDirection getDirection() override {return RtpDirection::sendonly;}
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const char* getKey() const override { return getRtpDirectionString(getDirection());}
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RtpDirection getDirection() const override {return RtpDirection::sendonly;}
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};
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class SdpDirectionRecvonly : public SdpItem, public DirectionInterface{
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public:
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const char* getKey() override { return getRtpDirectionString(getDirection());}
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RtpDirection getDirection() override {return RtpDirection::recvonly;}
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const char* getKey() const override { return getRtpDirectionString(getDirection());}
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RtpDirection getDirection() const override {return RtpDirection::recvonly;}
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};
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class SdpDirectionSendrecv : public SdpItem, public DirectionInterface{
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public:
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const char* getKey() override { return getRtpDirectionString(getDirection());}
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RtpDirection getDirection() override {return RtpDirection::sendrecv;}
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const char* getKey() const override { return getRtpDirectionString(getDirection());}
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RtpDirection getDirection() const override {return RtpDirection::sendrecv;}
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};
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class SdpDirectionInactive : public SdpItem, public DirectionInterface{
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public:
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const char* getKey() override { return getRtpDirectionString(getDirection());}
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RtpDirection getDirection() override {return RtpDirection::inactive;}
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const char* getKey() const override { return getRtpDirectionString(getDirection());}
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RtpDirection getDirection() const override {return RtpDirection::inactive;}
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};
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static bool registerAllItem(){
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@ -69,6 +69,7 @@ static bool registerAllItem(){
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registerSdpItem<SdpAttrRtcp>();
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registerSdpItem<SdpAttrIceUfrag>();
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registerSdpItem<SdpAttrIcePwd>();
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registerSdpItem<SdpAttrIceOption>();
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registerSdpItem<SdpAttrFingerprint>();
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registerSdpItem<SdpAttrSetup>();
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registerSdpItem<SdpAttrMid>();
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@ -77,6 +78,7 @@ static bool registerAllItem(){
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registerSdpItem<SdpAttrRtcpFb>();
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registerSdpItem<SdpAttrFmtp>();
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registerSdpItem<SdpAttrSSRC>();
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registerSdpItem<SdpAttrSSRCGroup>();
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registerSdpItem<SdpAttrSctpMap>();
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registerSdpItem<SdpAttrCandidate>();
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registerSdpItem<SdpDirectionSendonly>();
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@ -230,6 +232,8 @@ RtpDirection RtcMedia::getDirection() const{
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//////////////////////////////////////////////////////////////////////////////////////////
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#define SDP_THROW() throw std::invalid_argument(StrPrinter << "解析sdp " << getKey() << " 字段失败:" << str)
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#define SDP_THROW2() throw std::invalid_argument(StrPrinter << "生成sdp " << getKey() << " 字段失败")
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void SdpTime::parse(const string &str) {
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if (sscanf(str.data(), "%" PRIu64 " %" PRIu64, &start, &stop) != 2) {
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SDP_THROW();
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@ -555,6 +559,41 @@ string SdpAttrSSRC::toString() const {
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return SdpItem::toString();
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}
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void SdpAttrSSRCGroup::parse(const string &str) {
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auto vec = split(str, " ");
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if (vec.size() == 3) {
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if (vec[0] != "FID") {
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SDP_THROW();
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}
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type = std::move(vec[0]);
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u.fid.rtp_ssrc = atoi(vec[1].data());
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u.fid.rtx_ssrc = atoi(vec[2].data());
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} else if (vec.size() == 4) {
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if (vec[0] != "SIM") {
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SDP_THROW();
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}
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type = std::move(vec[0]);
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u.sim.rtp_ssrc_low = atoi(vec[1].data());
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u.sim.rtp_ssrc_mid = atoi(vec[2].data());
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u.sim.rtp_ssrc_high = atoi(vec[3].data());
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} else {
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SDP_THROW();
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}
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}
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string SdpAttrSSRCGroup::toString() const {
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if (value.empty()) {
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if (type == "FID") {
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value = type + " " + to_string(u.fid.rtp_ssrc) + " " + to_string(u.fid.rtx_ssrc);
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} else if (type == "SIM") {
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value = type + " " + to_string(u.sim.rtp_ssrc_low) + " " + to_string(u.sim.rtp_ssrc_mid) + " " + to_string(u.sim.rtp_ssrc_high);
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} else {
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SDP_THROW2();
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}
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}
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return SdpItem::toString();
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}
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void SdpAttrSctpMap::parse(const string &str) {
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char subtypes_buf[64] = {0};
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if (3 == sscanf(str.data(), "%" PRIu16 " %63[^ ] %" PRId32, &port, subtypes_buf, &streams)) {
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81
webrtc/Sdp.h
81
webrtc/Sdp.h
@ -87,7 +87,7 @@ public:
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virtual string toString() const {
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return value;
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}
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virtual const char* getKey() = 0;
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virtual const char* getKey() const = 0;
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protected:
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mutable string value;
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@ -97,14 +97,14 @@ template <char KEY>
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class SdpString : public SdpItem{
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public:
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// *=*
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const char* getKey() override { static string key(1, KEY); return key.data();}
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const char* getKey() const override { static string key(1, KEY); return key.data();}
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};
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class SdpCommon : public SdpItem {
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public:
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string key;
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SdpCommon(string key) { this->key = std::move(key); }
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const char* getKey() override { return key.data();}
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const char* getKey() const override { return key.data();}
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};
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class SdpTime : public SdpItem{
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@ -115,7 +115,7 @@ public:
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uint64_t stop {0};
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() override { return "t";}
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const char* getKey() const override { return "t";}
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};
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class SdpOrigin : public SdpItem{
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@ -131,7 +131,7 @@ public:
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string address {"0.0.0.0"};
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() override { return "o";}
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const char* getKey() const override { return "o";}
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};
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class SdpConnection : public SdpItem {
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@ -144,7 +144,7 @@ public:
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string address {"0.0.0.0"};
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() override { return "c";}
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const char* getKey() const override { return "c";}
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};
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class SdpBandwidth : public SdpItem {
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@ -158,7 +158,7 @@ public:
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() override { return "b";}
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const char* getKey() const override { return "b";}
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};
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class SdpMedia : public SdpItem {
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@ -172,7 +172,7 @@ public:
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() override { return "m";}
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const char* getKey() const override { return "m";}
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};
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class SdpAttr : public SdpItem{
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@ -184,7 +184,7 @@ public:
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SdpItem::Ptr detail;
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() override { return "a";}
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const char* getKey() const override { return "a";}
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};
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class SdpAttrGroup : public SdpItem{
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@ -197,7 +197,7 @@ public:
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vector<string> mids;
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void parse(const string &str) override ;
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string toString() const override ;
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const char* getKey() override { return "group";}
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const char* getKey() const override { return "group";}
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};
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class SdpAttrMsidSemantic : public SdpItem {
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@ -226,7 +226,7 @@ public:
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string token;
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() override { return "msid-semantic";}
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const char* getKey() const override { return "msid-semantic";}
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};
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class SdpAttrRtcp : public SdpItem {
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@ -238,19 +238,25 @@ public:
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string address {"0.0.0.0"};
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void parse(const string &str) override;;
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string toString() const override;
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const char* getKey() override { return "rtcp";}
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const char* getKey() const override { return "rtcp";}
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};
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class SdpAttrIceUfrag : public SdpItem {
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public:
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//a=ice-ufrag:sXJ3
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const char* getKey() override { return "ice-ufrag";}
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const char* getKey() const override { return "ice-ufrag";}
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};
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class SdpAttrIcePwd : public SdpItem {
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public:
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//a=ice-pwd:yEclOTrLg1gEubBFefOqtmyV
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const char* getKey() override { return "ice-pwd";}
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const char* getKey() const override { return "ice-pwd";}
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};
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class SdpAttrIceOption : public SdpItem {
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public:
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//a=ice-options:trickle
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const char* getKey() const override { return "ice-options";}
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};
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class SdpAttrFingerprint : public SdpItem {
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@ -260,7 +266,7 @@ public:
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string hash;
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() override { return "fingerprint";}
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const char* getKey() const override { return "fingerprint";}
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};
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class SdpAttrSetup : public SdpItem {
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@ -269,13 +275,13 @@ public:
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DtlsRole role{DtlsRole::actpass};
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() override { return "setup";}
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const char* getKey() const override { return "setup";}
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};
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class SdpAttrMid : public SdpItem {
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public:
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//a=mid:audio
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const char* getKey() override { return "mid";}
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const char* getKey() const override { return "mid";}
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};
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class SdpAttrExtmap : public SdpItem {
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@ -285,7 +291,7 @@ public:
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string ext;
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() override { return "extmap";}
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const char* getKey() const override { return "extmap";}
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};
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class SdpAttrRtpMap : public SdpItem {
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@ -297,7 +303,7 @@ public:
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int channel {0};
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() override { return "rtpmap";}
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const char* getKey() const override { return "rtpmap";}
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};
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class SdpAttrRtcpFb : public SdpItem {
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@ -307,7 +313,7 @@ public:
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vector<string> arr;
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() override { return "rtcp-fb";}
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const char* getKey() const override { return "rtcp-fb";}
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};
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class SdpAttrFmtp : public SdpItem {
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@ -317,7 +323,7 @@ public:
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vector<std::pair<string, string> > arr;
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() override { return "fmtp";}
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const char* getKey() const override { return "fmtp";}
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};
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class SdpAttrSSRC : public SdpItem {
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@ -330,7 +336,34 @@ public:
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string attribute_value;
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() override { return "ssrc";}
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const char* getKey() const override { return "ssrc";}
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};
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class SdpAttrSSRCGroup : public SdpItem {
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public:
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//a=ssrc-group 定义参考 RFC 5576 ，用于描述多个 ssrc 之间的关联，常见的有两种：
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//a=ssrc-group:FID 2430709021 3715850271
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// FID (Flow Identification) 最初用在 FEC 的关联中，WebRTC 中通常用于关联一组常规 RTP stream 和 重传 RTP stream 。
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//a=ssrc-group:SIM 360918977 360918978 360918980
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// 在 Chrome 独有的 SDP munging 风格的 simulcast 中使用，将三组编码质量由低到高的 MediaStreamTrack 关联在一起。
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string type{"FID"};
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union {
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struct {
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uint32_t rtp_ssrc;
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uint32_t rtx_ssrc;
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} fid;
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struct {
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uint32_t rtp_ssrc_low;
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uint32_t rtp_ssrc_mid;
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uint32_t rtp_ssrc_high;
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} sim;
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} u;
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() const override { return "ssrc-group";}
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};
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class SdpAttrSctpMap : public SdpItem {
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@ -343,7 +376,7 @@ public:
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int streams;
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() override { return "sctpmap";}
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const char* getKey() const override { return "sctpmap";}
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};
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class SdpAttrCandidate : public SdpItem {
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@ -363,7 +396,7 @@ public:
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void parse(const string &str) override;
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string toString() const override;
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const char* getKey() override { return "candidate";}
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const char* getKey() const override { return "candidate";}
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};
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class RtcMedia {
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