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https://github.com/ZLMediaKit/ZLMediaKit.git
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Format code
This commit is contained in:
xiongziliang
parent
d8893877b2
commit
7aaafa18e7
435
webrtc/Sdp.cpp
435
webrtc/Sdp.cpp
File diff suppressed because it is too large
Load Diff
461
webrtc/Sdp.h
461
webrtc/Sdp.h
@ -22,97 +22,87 @@
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namespace mediakit {
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//https://datatracker.ietf.org/doc/rfc4566/?include_text=1
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//https://blog.csdn.net/aggresss/article/details/109850434
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//https://aggresss.blog.csdn.net/article/details/106436703
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//Session description
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// v= (protocol version)
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// o= (originator and session identifier)
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// s= (session name)
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// i=* (session information)
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// u=* (URI of description)
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// e=* (email address)
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// p=* (phone number)
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// c=* (connection information -- not required if included in
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// all media)
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// b=* (zero or more bandwidth information lines)
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// One or more time descriptions ("t=" and "r=" lines; see below)
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// z=* (time zone adjustments)
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// k=* (encryption key)
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// a=* (zero or more session attribute lines)
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// Zero or more media descriptions
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// https://datatracker.ietf.org/doc/rfc4566/?include_text=1
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// https://blog.csdn.net/aggresss/article/details/109850434
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// https://aggresss.blog.csdn.net/article/details/106436703
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// Session description
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// v= (protocol version)
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// o= (originator and session identifier)
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// s= (session name)
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// i=* (session information)
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// u=* (URI of description)
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// e=* (email address)
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// p=* (phone number)
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// c=* (connection information -- not required if included in
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// all media)
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// b=* (zero or more bandwidth information lines)
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// One or more time descriptions ("t=" and "r=" lines; see below)
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// z=* (time zone adjustments)
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// k=* (encryption key)
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// a=* (zero or more session attribute lines)
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// Zero or more media descriptions
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//
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// Time description
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// t= (time the session is active)
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// r=* (zero or more repeat times)
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// Time description
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// t= (time the session is active)
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// r=* (zero or more repeat times)
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//
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// Media description, if present
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// m= (media name and transport address)
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// i=* (media title)
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// c=* (connection information -- optional if included at
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// session level)
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// b=* (zero or more bandwidth information lines)
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// k=* (encryption key)
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// a=* (zero or more media attribute lines)
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// Media description, if present
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// m= (media name and transport address)
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// i=* (media title)
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// c=* (connection information -- optional if included at
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// session level)
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// b=* (zero or more bandwidth information lines)
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// k=* (encryption key)
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// a=* (zero or more media attribute lines)
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enum class RtpDirection {
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invalid = -1,
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//只发送
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// 只发送
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sendonly,
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//只接收
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// 只接收
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recvonly,
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//同时发送接收
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// 同时发送接收
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sendrecv,
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//禁止发送数据
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// 禁止发送数据
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inactive
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};
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enum class DtlsRole {
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invalid = -1,
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//客户端
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// 客户端
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active,
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//服务端
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// 服务端
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passive,
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//既可作做客户端也可以做服务端
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// 既可作做客户端也可以做服务端
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actpass,
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};
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enum class SdpType {
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invalid = -1,
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offer,
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answer
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};
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enum class SdpType { invalid = -1, offer, answer };
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DtlsRole getDtlsRole(const std::string &str);
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const char* getDtlsRoleString(DtlsRole role);
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const char *getDtlsRoleString(DtlsRole role);
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RtpDirection getRtpDirection(const std::string &str);
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const char* getRtpDirectionString(RtpDirection val);
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const char *getRtpDirectionString(RtpDirection val);
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class SdpItem {
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public:
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using Ptr = std::shared_ptr<SdpItem>;
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virtual ~SdpItem() = default;
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virtual void parse(const std::string &str) {
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value = str;
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}
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virtual std::string toString() const {
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return value;
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}
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virtual const char* getKey() const = 0;
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virtual void parse(const std::string &str) { value = str; }
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virtual std::string toString() const { return value; }
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virtual const char *getKey() const = 0;
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void reset() {
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value.clear();
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}
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void reset() { value.clear(); }
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protected:
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mutable std::string value;
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};
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template <char KEY>
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class SdpString : public SdpItem{
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class SdpString : public SdpItem {
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public:
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SdpString() = default;
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SdpString(std::string val) {value = std::move(val);}
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SdpString(std::string val) { value = std::move(val); }
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// *=*
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const char* getKey() const override { static std::string key(1, KEY); return key.data();}
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};
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@ -126,34 +116,34 @@ public:
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this->value = std::move(val);
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}
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const char* getKey() const 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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class SdpTime : public SdpItem {
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public:
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//5.9. Timing ("t=")
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// t=<start-time> <stop-time>
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uint64_t start {0};
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uint64_t stop {0};
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// 5.9. Timing ("t=")
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// t=<start-time> <stop-time>
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uint64_t start { 0 };
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uint64_t stop { 0 };
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void parse(const std::string &str) override;
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std::string toString() const override;
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const char* getKey() const 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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class SdpOrigin : public SdpItem {
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public:
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// 5.2. Origin ("o=")
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// o=jdoe 2890844526 2890842807 IN IP4 10.47.16.5
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// o=<username> <sess-id> <sess-version> <nettype> <addrtype> <unicast-address>
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std::string username {"-"};
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std::string username { "-" };
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std::string session_id;
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std::string session_version;
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std::string nettype {"IN"};
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std::string addrtype {"IP4"};
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std::string address {"0.0.0.0"};
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std::string nettype { "IN" };
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std::string addrtype { "IP4" };
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std::string address { "0.0.0.0" };
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void parse(const std::string &str) override;
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std::string toString() const override;
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const char* getKey() const override { return "o";}
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const char *getKey() const override { return "o"; }
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bool empty() const {
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return username.empty() || session_id.empty() || session_version.empty()
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|| nettype.empty() || addrtype.empty() || address.empty();
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@ -165,28 +155,28 @@ public:
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// 5.7. Connection Data ("c=")
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// c=IN IP4 224.2.17.12/127
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// c=<nettype> <addrtype> <connection-address>
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std::string nettype {"IN"};
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std::string addrtype {"IP4"};
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std::string address {"0.0.0.0"};
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std::string nettype { "IN" };
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std::string addrtype { "IP4" };
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std::string address { "0.0.0.0" };
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void parse(const std::string &str) override;
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std::string toString() const override;
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const char* getKey() const override { return "c";}
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bool empty() const {return address.empty();}
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const char *getKey() const override { return "c"; }
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bool empty() const { return address.empty(); }
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};
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class SdpBandwidth : public SdpItem {
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public:
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//5.8. Bandwidth ("b=")
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//b=<bwtype>:<bandwidth>
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// 5.8. Bandwidth ("b=")
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// b=<bwtype>:<bandwidth>
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//AS、CT
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std::string bwtype {"AS"};
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uint32_t bandwidth {0};
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// AS、CT
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std::string bwtype { "AS" };
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uint32_t bandwidth { 0 };
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void parse(const std::string &str) override;
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std::string toString() const override;
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const char* getKey() const override { return "b";}
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bool empty() const {return bandwidth == 0;}
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const char *getKey() const override { return "b"; }
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bool empty() const { return bandwidth == 0; }
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};
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class SdpMedia : public SdpItem {
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@ -195,287 +185,284 @@ public:
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// m=<media> <port> <proto> <fmt> ...
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TrackType type;
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uint16_t port;
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//RTP/AVP：应用场景为视频/音频的 RTP 协议。参考 RFC 3551
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//RTP/SAVP：应用场景为视频/音频的 SRTP 协议。参考 RFC 3711
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//RTP/AVPF: 应用场景为视频/音频的 RTP 协议，支持 RTCP-based Feedback。参考 RFC 4585
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//RTP/SAVPF: 应用场景为视频/音频的 SRTP 协议，支持 RTCP-based Feedback。参考 RFC 5124
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// RTP/AVP：应用场景为视频/音频的 RTP 协议。参考 RFC 3551
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// RTP/SAVP：应用场景为视频/音频的 SRTP 协议。参考 RFC 3711
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// RTP/AVPF: 应用场景为视频/音频的 RTP 协议，支持 RTCP-based Feedback。参考 RFC 4585
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// RTP/SAVPF: 应用场景为视频/音频的 SRTP 协议，支持 RTCP-based Feedback。参考 RFC 5124
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std::string proto;
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std::vector<std::string> fmts;
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void parse(const std::string &str) override;
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std::string toString() const override;
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const char* getKey() const 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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class SdpAttr : public SdpItem {
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public:
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using Ptr = std::shared_ptr<SdpAttr>;
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//5.13. Attributes ("a=")
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//a=<attribute>
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//a=<attribute>:<value>
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// 5.13. Attributes ("a=")
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// a=<attribute>
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// a=<attribute>:<value>
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SdpItem::Ptr detail;
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void parse(const std::string &str) override;
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std::string toString() const override;
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const char* getKey() const 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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class SdpAttrGroup : public SdpItem {
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public:
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//a=group:BUNDLE line with all the 'mid' identifiers part of the
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// BUNDLE group is included at the session-level.
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//a=group:LS session level attribute MUST be included wth the 'mid'
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// identifiers that are part of the same lip sync group.
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std::string type {"BUNDLE"};
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// a=group:BUNDLE line with all the 'mid' identifiers part of the
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// BUNDLE group is included at the session-level.
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// a=group:LS session level attribute MUST be included wth the 'mid'
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// identifiers that are part of the same lip sync group.
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std::string type { "BUNDLE" };
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std::vector<std::string> mids;
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void parse(const std::string &str) override ;
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std::string toString() const override ;
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const char* getKey() const override { return "group";}
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void parse(const std::string &str) override;
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std::string toString() const override;
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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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public:
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//https://tools.ietf.org/html/draft-alvestrand-rtcweb-msid-02#section-3
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//3. The Msid-Semantic Attribute
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// https://tools.ietf.org/html/draft-alvestrand-rtcweb-msid-02#section-3
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// 3. The Msid-Semantic Attribute
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//
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// In order to fully reproduce the semantics of the SDP and SSRC
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// grouping frameworks, a session-level attribute is defined for
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// signalling the semantics associated with an msid grouping.
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// In order to fully reproduce the semantics of the SDP and SSRC
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// grouping frameworks, a session-level attribute is defined for
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// signalling the semantics associated with an msid grouping.
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//
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// This OPTIONAL attribute gives the message ID and its group semantic.
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// a=msid-semantic: examplefoo LS
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// This OPTIONAL attribute gives the message ID and its group semantic.
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// a=msid-semantic: examplefoo LS
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//
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//
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// The ABNF of msid-semantic is:
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// The ABNF of msid-semantic is:
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//
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// msid-semantic-attr = "msid-semantic:" " " msid token
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// token = <as defined in RFC 4566>
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// msid-semantic-attr = "msid-semantic:" " " msid token
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// token = <as defined in RFC 4566>
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//
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// The semantic field may hold values from the IANA registries
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// "Semantics for the "ssrc-group" SDP Attribute" and "Semantics for the
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// "group" SDP Attribute".
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//a=msid-semantic: WMS 616cfbb1-33a3-4d8c-8275-a199d6005549
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std::string msid{"WMS"};
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// The semantic field may hold values from the IANA registries
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// "Semantics for the "ssrc-group" SDP Attribute" and "Semantics for the
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// "group" SDP Attribute".
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// a=msid-semantic: WMS 616cfbb1-33a3-4d8c-8275-a199d6005549
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std::string msid { "WMS" };
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std::string token;
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void parse(const std::string &str) override;
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std::string toString() const override;
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const char* getKey() const override { return "msid-semantic";}
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bool empty() const {
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return msid.empty();
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}
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const char *getKey() const override { return "msid-semantic"; }
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bool empty() const { return msid.empty(); }
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};
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class SdpAttrRtcp : public SdpItem {
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public:
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// a=rtcp:9 IN IP4 0.0.0.0
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uint16_t port{0};
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std::string nettype {"IN"};
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std::string addrtype {"IP4"};
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std::string address {"0.0.0.0"};
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void parse(const std::string &str) override;;
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uint16_t port { 0 };
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std::string nettype { "IN" };
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std::string addrtype { "IP4" };
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std::string address { "0.0.0.0" };
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void parse(const std::string &str) override;
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;
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std::string toString() const override;
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const char* getKey() const override { return "rtcp";}
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bool empty() const {
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return address.empty() || !port;
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}
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const char *getKey() const override { return "rtcp"; }
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bool empty() const { return address.empty() || !port; }
|
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};
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class SdpAttrIceUfrag : public SdpItem {
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public:
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SdpAttrIceUfrag() = default;
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SdpAttrIceUfrag(std::string str) {value = std::move(str);}
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//a=ice-ufrag:sXJ3
|
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const char* getKey() const override { return "ice-ufrag";}
|
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SdpAttrIceUfrag(std::string str) { value = std::move(str); }
|
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// a=ice-ufrag:sXJ3
|
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const char *getKey() const override { return "ice-ufrag"; }
|
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};
|
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|
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class SdpAttrIcePwd : public SdpItem {
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public:
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SdpAttrIcePwd() = default;
|
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SdpAttrIcePwd(std::string str) {value = std::move(str);}
|
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//a=ice-pwd:yEclOTrLg1gEubBFefOqtmyV
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const char* getKey() const override { return "ice-pwd";}
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SdpAttrIcePwd(std::string str) { value = std::move(str); }
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// a=ice-pwd:yEclOTrLg1gEubBFefOqtmyV
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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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bool trickle{false};
|
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bool renomination{false};
|
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// a=ice-options:trickle
|
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bool trickle { false };
|
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bool renomination { false };
|
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void parse(const std::string &str) override;
|
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std::string toString() const override;
|
||||
const char* getKey() const override { return "ice-options";}
|
||||
const char *getKey() const override { return "ice-options"; }
|
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};
|
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|
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class SdpAttrFingerprint : public SdpItem {
|
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public:
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//a=fingerprint:sha-256 22:14:B5:AF:66:12:C7:C7:8D:EF:4B:DE:40:25:ED:5D:8F:17:54:DD:88:33:C0:13:2E:FD:1A:FA:7E:7A:1B:79
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// a=fingerprint:sha-256 22:14:B5:AF:66:12:C7:C7:8D:EF:4B:DE:40:25:ED:5D:8F:17:54:DD:88:33:C0:13:2E:FD:1A:FA:7E:7A:1B:79
|
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std::string algorithm;
|
||||
std::string hash;
|
||||
void parse(const std::string &str) override;
|
||||
std::string toString() const override;
|
||||
const char* getKey() const override { return "fingerprint";}
|
||||
const char *getKey() const override { return "fingerprint"; }
|
||||
bool empty() const { return algorithm.empty() || hash.empty(); }
|
||||
};
|
||||
|
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class SdpAttrSetup : public SdpItem {
|
||||
public:
|
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//a=setup:actpass
|
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// a=setup:actpass
|
||||
SdpAttrSetup() = default;
|
||||
SdpAttrSetup(DtlsRole r) { role = r; }
|
||||
DtlsRole role{DtlsRole::actpass};
|
||||
DtlsRole role { DtlsRole::actpass };
|
||||
void parse(const std::string &str) override;
|
||||
std::string toString() const override;
|
||||
const char* getKey() const override { return "setup";}
|
||||
const char *getKey() const override { return "setup"; }
|
||||
};
|
||||
|
||||
class SdpAttrMid : public SdpItem {
|
||||
public:
|
||||
SdpAttrMid() = default;
|
||||
SdpAttrMid(std::string val) { value = std::move(val); }
|
||||
//a=mid:audio
|
||||
const char* getKey() const override { return "mid";}
|
||||
// a=mid:audio
|
||||
const char *getKey() const override { return "mid"; }
|
||||
};
|
||||
|
||||
class SdpAttrExtmap : public SdpItem {
|
||||
public:
|
||||
//https://aggresss.blog.csdn.net/article/details/106436703
|
||||
//a=extmap:1[/sendonly] urn:ietf:params:rtp-hdrext:ssrc-audio-level
|
||||
// https://aggresss.blog.csdn.net/article/details/106436703
|
||||
// a=extmap:1[/sendonly] urn:ietf:params:rtp-hdrext:ssrc-audio-level
|
||||
uint8_t id;
|
||||
RtpDirection direction{RtpDirection::invalid};
|
||||
RtpDirection direction { RtpDirection::invalid };
|
||||
std::string ext;
|
||||
void parse(const std::string &str) override;
|
||||
std::string toString() const override;
|
||||
const char* getKey() const override { return "extmap";}
|
||||
const char *getKey() const override { return "extmap"; }
|
||||
};
|
||||
|
||||
class SdpAttrRtpMap : public SdpItem {
|
||||
public:
|
||||
//a=rtpmap:111 opus/48000/2
|
||||
// a=rtpmap:111 opus/48000/2
|
||||
uint8_t pt;
|
||||
std::string codec;
|
||||
uint32_t sample_rate;
|
||||
uint32_t channel {0};
|
||||
uint32_t channel { 0 };
|
||||
void parse(const std::string &str) override;
|
||||
std::string toString() const override;
|
||||
const char* getKey() const override { return "rtpmap";}
|
||||
const char *getKey() const override { return "rtpmap"; }
|
||||
};
|
||||
|
||||
class SdpAttrRtcpFb : public SdpItem {
|
||||
public:
|
||||
//a=rtcp-fb:98 nack pli
|
||||
//a=rtcp-fb:120 nack 支持 nack 重传，nack (Negative-Acknowledgment) 。
|
||||
//a=rtcp-fb:120 nack pli 支持 nack 关键帧重传，PLI (Picture Loss Indication) 。
|
||||
//a=rtcp-fb:120 ccm fir 支持编码层关键帧请求，CCM (Codec Control Message)，FIR (Full Intra Request )，通常与 nack pli 有同样的效果，但是 nack pli 是用于重传时的关键帧请求。
|
||||
//a=rtcp-fb:120 goog-remb 支持 REMB (Receiver Estimated Maximum Bitrate) 。
|
||||
//a=rtcp-fb:120 transport-cc 支持 TCC (Transport Congest Control) 。
|
||||
// a=rtcp-fb:98 nack pli
|
||||
// a=rtcp-fb:120 nack 支持 nack 重传，nack (Negative-Acknowledgment) 。
|
||||
// a=rtcp-fb:120 nack pli 支持 nack 关键帧重传，PLI (Picture Loss Indication) 。
|
||||
// a=rtcp-fb:120 ccm fir 支持编码层关键帧请求，CCM (Codec Control Message)，FIR (Full Intra Request )，通常与 nack pli 有同样的效果，但是 nack pli
|
||||
// 是用于重传时的关键帧请求。 a=rtcp-fb:120 goog-remb 支持 REMB (Receiver Estimated Maximum Bitrate) 。 a=rtcp-fb:120 transport-cc 支持 TCC (Transport
|
||||
// Congest Control) 。
|
||||
uint8_t pt;
|
||||
std::string rtcp_type;
|
||||
void parse(const std::string &str) override;
|
||||
std::string toString() const override;
|
||||
const char* getKey() const override { return "rtcp-fb";}
|
||||
const char *getKey() const override { return "rtcp-fb"; }
|
||||
};
|
||||
|
||||
class SdpAttrFmtp : public SdpItem {
|
||||
public:
|
||||
//fmtp:96 level-asymmetry-allowed=1;packetization-mode=0;profile-level-id=42e01f
|
||||
// fmtp:96 level-asymmetry-allowed=1;packetization-mode=0;profile-level-id=42e01f
|
||||
uint8_t pt;
|
||||
std::map<std::string/*key*/, std::string/*value*/, StrCaseCompare> fmtp;
|
||||
std::map<std::string /*key*/, std::string /*value*/, StrCaseCompare> fmtp;
|
||||
void parse(const std::string &str) override;
|
||||
std::string toString() const override;
|
||||
const char* getKey() const override { return "fmtp";}
|
||||
const char *getKey() const override { return "fmtp"; }
|
||||
};
|
||||
|
||||
class SdpAttrSSRC : public SdpItem {
|
||||
public:
|
||||
//a=ssrc:3245185839 cname:Cx4i/VTR51etgjT7
|
||||
//a=ssrc:3245185839 msid:cb373bff-0fea-4edb-bc39-e49bb8e8e3b9 0cf7e597-36a2-4480-9796-69bf0955eef5
|
||||
//a=ssrc:3245185839 mslabel:cb373bff-0fea-4edb-bc39-e49bb8e8e3b9
|
||||
//a=ssrc:3245185839 label:0cf7e597-36a2-4480-9796-69bf0955eef5
|
||||
//a=ssrc:<ssrc-id> <attribute>
|
||||
//a=ssrc:<ssrc-id> <attribute>:<value>
|
||||
//cname 是必须的，msid/mslabel/label 这三个属性都是 WebRTC 自创的，或者说 Google 自创的，可以参考 https://tools.ietf.org/html/draft-ietf-mmusic-msid-17，
|
||||
// 理解它们三者的关系需要先了解三个概念：RTP stream / MediaStreamTrack / MediaStream ：
|
||||
//一个 a=ssrc 代表一个 RTP stream ；
|
||||
//一个 MediaStreamTrack 通常包含一个或多个 RTP stream，例如一个视频 MediaStreamTrack 中通常包含两个 RTP stream，一个用于常规传输，一个用于 nack 重传；
|
||||
//一个 MediaStream 通常包含一个或多个 MediaStreamTrack ，例如 simulcast 场景下，一个 MediaStream 通常会包含三个不同编码质量的 MediaStreamTrack ；
|
||||
//这种标记方式并不被 Firefox 认可，在 Firefox 生成的 SDP 中一个 a=ssrc 通常只有一行，例如：
|
||||
//a=ssrc:3245185839 cname:Cx4i/VTR51etgjT7
|
||||
// a=ssrc:3245185839 cname:Cx4i/VTR51etgjT7
|
||||
// a=ssrc:3245185839 msid:cb373bff-0fea-4edb-bc39-e49bb8e8e3b9 0cf7e597-36a2-4480-9796-69bf0955eef5
|
||||
// a=ssrc:3245185839 mslabel:cb373bff-0fea-4edb-bc39-e49bb8e8e3b9
|
||||
// a=ssrc:3245185839 label:0cf7e597-36a2-4480-9796-69bf0955eef5
|
||||
// a=ssrc:<ssrc-id> <attribute>
|
||||
// a=ssrc:<ssrc-id> <attribute>:<value>
|
||||
// cname 是必须的，msid/mslabel/label 这三个属性都是 WebRTC 自创的，或者说 Google 自创的，可以参考 https://tools.ietf.org/html/draft-ietf-mmusic-msid-17，
|
||||
// 理解它们三者的关系需要先了解三个概念：RTP stream / MediaStreamTrack / MediaStream ：
|
||||
// 一个 a=ssrc 代表一个 RTP stream ；
|
||||
// 一个 MediaStreamTrack 通常包含一个或多个 RTP stream，例如一个视频 MediaStreamTrack 中通常包含两个 RTP stream，一个用于常规传输，一个用于 nack 重传；
|
||||
// 一个 MediaStream 通常包含一个或多个 MediaStreamTrack ，例如 simulcast 场景下，一个 MediaStream 通常会包含三个不同编码质量的 MediaStreamTrack ；
|
||||
// 这种标记方式并不被 Firefox 认可，在 Firefox 生成的 SDP 中一个 a=ssrc 通常只有一行，例如：
|
||||
// a=ssrc:3245185839 cname:Cx4i/VTR51etgjT7
|
||||
|
||||
uint32_t ssrc;
|
||||
std::string attribute;
|
||||
std::string attribute_value;
|
||||
void parse(const std::string &str) override;
|
||||
std::string toString() const override;
|
||||
const char* getKey() const override { return "ssrc";}
|
||||
const char *getKey() const override { return "ssrc"; }
|
||||
};
|
||||
|
||||
class SdpAttrSSRCGroup : public SdpItem {
|
||||
public:
|
||||
//a=ssrc-group 定义参考 RFC 5576(https://tools.ietf.org/html/rfc5576) ，用于描述多个 ssrc 之间的关联，常见的有两种：
|
||||
//a=ssrc-group:FID 2430709021 3715850271
|
||||
// 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 。
|
||||
//a=ssrc-group:SIM 360918977 360918978 360918980
|
||||
// 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。
|
||||
std::string type{"FID"};
|
||||
// a=ssrc-group 定义参考 RFC 5576(https://tools.ietf.org/html/rfc5576) ，用于描述多个 ssrc 之间的关联，常见的有两种：
|
||||
// a=ssrc-group:FID 2430709021 3715850271
|
||||
// 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 。
|
||||
// a=ssrc-group:SIM 360918977 360918978 360918980
|
||||
// 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。
|
||||
std::string type { "FID" };
|
||||
std::vector<uint32_t> ssrcs;
|
||||
|
||||
bool isFID() const { return type == "FID"; }
|
||||
bool isSIM() const { return type == "SIM"; }
|
||||
void parse(const std::string &str) override;
|
||||
std::string toString() const override;
|
||||
const char* getKey() const override { return "ssrc-group";}
|
||||
const char *getKey() const override { return "ssrc-group"; }
|
||||
};
|
||||
|
||||
class SdpAttrSctpMap : public SdpItem {
|
||||
public:
|
||||
//https://tools.ietf.org/html/draft-ietf-mmusic-sctp-sdp-05
|
||||
//a=sctpmap:5000 webrtc-datachannel 1024
|
||||
//a=sctpmap: sctpmap-number media-subtypes [streams]
|
||||
// https://tools.ietf.org/html/draft-ietf-mmusic-sctp-sdp-05
|
||||
// a=sctpmap:5000 webrtc-datachannel 1024
|
||||
// a=sctpmap: sctpmap-number media-subtypes [streams]
|
||||
uint16_t port = 0;
|
||||
std::string subtypes;
|
||||
uint32_t streams = 0;
|
||||
void parse(const std::string &str) override;
|
||||
std::string toString() const override;
|
||||
const char* getKey() const override { return "sctpmap";}
|
||||
const char *getKey() const override { return "sctpmap"; }
|
||||
bool empty() const { return port == 0 && subtypes.empty() && streams == 0; }
|
||||
};
|
||||
|
||||
class SdpAttrCandidate : public SdpItem {
|
||||
public:
|
||||
using Ptr = std::shared_ptr<SdpAttrCandidate>;
|
||||
//https://tools.ietf.org/html/rfc5245
|
||||
//15.1. "candidate" Attribute
|
||||
//a=candidate:4 1 udp 2 192.168.1.7 58107 typ host
|
||||
//a=candidate:<foundation> <component-id> <transport> <priority> <address> <port> typ <cand-type>
|
||||
// https://tools.ietf.org/html/rfc5245
|
||||
// 15.1. "candidate" Attribute
|
||||
// a=candidate:4 1 udp 2 192.168.1.7 58107 typ host
|
||||
// a=candidate:<foundation> <component-id> <transport> <priority> <address> <port> typ <cand-type>
|
||||
std::string foundation;
|
||||
//传输媒体的类型,1代表RTP;2代表 RTCP。
|
||||
// 传输媒体的类型,1代表RTP;2代表 RTCP。
|
||||
uint32_t component;
|
||||
std::string transport {"udp"};
|
||||
std::string transport { "udp" };
|
||||
uint32_t priority;
|
||||
std::string address;
|
||||
uint16_t port;
|
||||
std::string type;
|
||||
std::vector<std::pair<std::string, std::string> > arr;
|
||||
std::vector<std::pair<std::string, std::string>> arr;
|
||||
|
||||
void parse(const std::string &str) override;
|
||||
std::string toString() const override;
|
||||
const char* getKey() const override { return "candidate";}
|
||||
const char *getKey() const override { return "candidate"; }
|
||||
};
|
||||
|
||||
class SdpAttrMsid : public SdpItem{
|
||||
class SdpAttrMsid : public SdpItem {
|
||||
public:
|
||||
const char* getKey() const override { return "msid";}
|
||||
const char *getKey() const override { return "msid"; }
|
||||
};
|
||||
|
||||
class SdpAttrExtmapAllowMixed : public SdpItem{
|
||||
class SdpAttrExtmapAllowMixed : public SdpItem {
|
||||
public:
|
||||
const char* getKey() const override { return "extmap-allow-mixed";}
|
||||
const char *getKey() const override { return "extmap-allow-mixed"; }
|
||||
};
|
||||
|
||||
class SdpAttrSimulcast : public SdpItem{
|
||||
class SdpAttrSimulcast : public SdpItem {
|
||||
public:
|
||||
//https://www.meetecho.com/blog/simulcast-janus-ssrc/
|
||||
//https://tools.ietf.org/html/draft-ietf-mmusic-sdp-simulcast-14
|
||||
const char* getKey() const override { return "simulcast";}
|
||||
// https://www.meetecho.com/blog/simulcast-janus-ssrc/
|
||||
// https://tools.ietf.org/html/draft-ietf-mmusic-sdp-simulcast-14
|
||||
const char *getKey() const override { return "simulcast"; }
|
||||
void parse(const std::string &str) override;
|
||||
std::string toString() const override;
|
||||
bool empty() const { return rids.empty(); }
|
||||
@ -483,11 +470,11 @@ public:
|
||||
std::vector<std::string> rids;
|
||||
};
|
||||
|
||||
class SdpAttrRid : public SdpItem{
|
||||
class SdpAttrRid : public SdpItem {
|
||||
public:
|
||||
void parse(const std::string &str) override;
|
||||
std::string toString() const override;
|
||||
const char* getKey() const override { return "rid";}
|
||||
const char *getKey() const override { return "rid"; }
|
||||
std::string direction;
|
||||
std::string rid;
|
||||
};
|
||||
@ -507,8 +494,8 @@ public:
|
||||
|
||||
RtpDirection getDirection() const;
|
||||
|
||||
template<typename cls>
|
||||
cls getItemClass(char key, const char *attr_key = nullptr) const{
|
||||
template <typename cls>
|
||||
cls getItemClass(char key, const char *attr_key = nullptr) const {
|
||||
auto item = std::dynamic_pointer_cast<cls>(getItem(key, attr_key));
|
||||
if (!item) {
|
||||
return cls();
|
||||
@ -516,7 +503,7 @@ public:
|
||||
return *item;
|
||||
}
|
||||
|
||||
std::string getStringItem(char key, const char *attr_key = nullptr) const{
|
||||
std::string getStringItem(char key, const char *attr_key = nullptr) const {
|
||||
auto item = getItem(key, attr_key);
|
||||
if (!item) {
|
||||
return "";
|
||||
@ -526,7 +513,7 @@ public:
|
||||
|
||||
SdpItem::Ptr getItem(char key, const char *attr_key = nullptr) const;
|
||||
|
||||
template<typename cls>
|
||||
template <typename cls>
|
||||
std::vector<cls> getAllItem(char key_c, const char *attr_key = nullptr) const {
|
||||
std::vector<cls> ret;
|
||||
std::string key(1, key_c);
|
||||
@ -555,7 +542,7 @@ private:
|
||||
std::vector<SdpItem::Ptr> items;
|
||||
};
|
||||
|
||||
class RtcSessionSdp : public RtcSdpBase{
|
||||
class RtcSessionSdp : public RtcSdpBase {
|
||||
public:
|
||||
using Ptr = std::shared_ptr<RtcSessionSdp>;
|
||||
int getVersion() const;
|
||||
@ -572,7 +559,7 @@ public:
|
||||
std::string getTimeZone() const;
|
||||
std::string getEncryptKey() const;
|
||||
std::string getRepeatTimes() const;
|
||||
|
||||
|
||||
std::vector<RtcSdpBase> medias;
|
||||
void parse(const std::string &str);
|
||||
std::string toString() const override;
|
||||
@ -580,45 +567,45 @@ public:
|
||||
|
||||
//////////////////////////////////////////////////////////////////
|
||||
|
||||
//ssrc相关信息
|
||||
class RtcSSRC{
|
||||
// ssrc相关信息
|
||||
class RtcSSRC {
|
||||
public:
|
||||
uint32_t ssrc {0};
|
||||
uint32_t rtx_ssrc {0};
|
||||
uint32_t ssrc { 0 };
|
||||
uint32_t rtx_ssrc { 0 };
|
||||
std::string cname;
|
||||
std::string msid;
|
||||
std::string mslabel;
|
||||
std::string label;
|
||||
|
||||
bool empty() const {return ssrc == 0 && cname.empty();}
|
||||
bool empty() const { return ssrc == 0 && cname.empty(); }
|
||||
};
|
||||
|
||||
//rtc传输编码方案
|
||||
class RtcCodecPlan{
|
||||
// rtc传输编码方案
|
||||
class RtcCodecPlan {
|
||||
public:
|
||||
using Ptr = std::shared_ptr<RtcCodecPlan>;
|
||||
uint8_t pt;
|
||||
std::string codec;
|
||||
uint32_t sample_rate;
|
||||
//音频时有效
|
||||
// 音频时有效
|
||||
uint32_t channel = 0;
|
||||
//rtcp反馈
|
||||
// rtcp反馈
|
||||
std::set<std::string> rtcp_fb;
|
||||
std::map<std::string/*key*/, std::string/*value*/, StrCaseCompare> fmtp;
|
||||
std::map<std::string /*key*/, std::string /*value*/, StrCaseCompare> fmtp;
|
||||
|
||||
std::string getFmtp(const char *key) const;
|
||||
};
|
||||
|
||||
//rtc 媒体描述
|
||||
class RtcMedia{
|
||||
// rtc 媒体描述
|
||||
class RtcMedia {
|
||||
public:
|
||||
TrackType type{TrackType::TrackInvalid};
|
||||
TrackType type { TrackType::TrackInvalid };
|
||||
std::string mid;
|
||||
uint16_t port{0};
|
||||
uint16_t port { 0 };
|
||||
SdpConnection addr;
|
||||
SdpBandwidth bandwidth;
|
||||
std::string proto;
|
||||
RtpDirection direction{RtpDirection::invalid};
|
||||
RtpDirection direction { RtpDirection::invalid };
|
||||
std::vector<RtcCodecPlan> plan;
|
||||
|
||||
//////// rtp ////////
|
||||
@ -629,20 +616,20 @@ public:
|
||||
std::vector<std::string> rtp_rids;
|
||||
|
||||
//////// rtcp ////////
|
||||
bool rtcp_mux{false};
|
||||
bool rtcp_rsize{false};
|
||||
bool rtcp_mux { false };
|
||||
bool rtcp_rsize { false };
|
||||
SdpAttrRtcp rtcp_addr;
|
||||
|
||||
//////// ice ////////
|
||||
bool ice_trickle{false};
|
||||
bool ice_lite{false};
|
||||
bool ice_renomination{false};
|
||||
bool ice_trickle { false };
|
||||
bool ice_lite { false };
|
||||
bool ice_renomination { false };
|
||||
std::string ice_ufrag;
|
||||
std::string ice_pwd;
|
||||
std::vector<SdpAttrCandidate> candidate;
|
||||
|
||||
//////// dtls ////////
|
||||
DtlsRole role{DtlsRole::invalid};
|
||||
DtlsRole role { DtlsRole::invalid };
|
||||
SdpAttrFingerprint fingerprint;
|
||||
|
||||
//////// extmap ////////
|
||||
@ -650,7 +637,7 @@ public:
|
||||
|
||||
//////// sctp ////////////
|
||||
SdpAttrSctpMap sctpmap;
|
||||
uint32_t sctp_port{0};
|
||||
uint32_t sctp_port { 0 };
|
||||
|
||||
void checkValid() const;
|
||||
const RtcCodecPlan *getPlan(uint8_t pt) const;
|
||||
@ -679,7 +666,7 @@ public:
|
||||
void checkValid() const;
|
||||
std::string toString() const;
|
||||
std::string toRtspSdp() const;
|
||||
const RtcMedia *getMedia(TrackType type) const;
|
||||
const RtcMedia *getMedia(TrackType type) const;
|
||||
bool supportRtcpFb(const std::string &name, TrackType type = TrackType::TrackVideo) const;
|
||||
bool supportSimulcast() const;
|
||||
bool isOnlyDatachannel() const;
|
||||
@ -705,7 +692,7 @@ public:
|
||||
std::string ice_ufrag;
|
||||
std::string ice_pwd;
|
||||
|
||||
RtpDirection direction{RtpDirection::invalid};
|
||||
RtpDirection direction { RtpDirection::invalid };
|
||||
SdpAttrFingerprint fingerprint;
|
||||
|
||||
std::set<std::string> rtcp_fb;
|
||||
@ -752,6 +739,6 @@ private:
|
||||
~SdpConst() = delete;
|
||||
};
|
||||
|
||||
}// namespace mediakit
|
||||
} // namespace mediakit
|
||||
|
||||
#endif //ZLMEDIAKIT_SDP_H
|
||||
#endif // ZLMEDIAKIT_SDP_H
|
||||
|
||||
Loading…
Reference in New Issue
Block a user