mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-10-06 20:23:43 +08:00
1079 lines
35 KiB
C++
1079 lines
35 KiB
C++
//
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// Created by xzl on 2021/3/27.
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//
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#include "Sdp.h"
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#include "assert.h"
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#include "Common/Parser.h"
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#include <inttypes.h>
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#define CHECK(exp) Assert_Throw(!(exp), #exp, __FUNCTION__, __FILE__, __LINE__);
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using onCreateSdpItem = function<SdpItem::Ptr(const string &key, const string &value)>;
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static map<string, onCreateSdpItem, StrCaseCompare> sdpItemCreator;
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template <typename Item>
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void registerSdpItem(){
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onCreateSdpItem func = [](const string &key, const string &value) {
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auto ret = std::make_shared<Item>();
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ret->parse(value);
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return ret;
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};
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Item item;
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sdpItemCreator.emplace(item.getKey(), std::move(func));
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}
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class DirectionInterface {
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public:
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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() 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() 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() 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() 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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registerSdpItem<SdpString<'v'> >();
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registerSdpItem<SdpString<'s'> >();
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registerSdpItem<SdpString<'i'> >();
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registerSdpItem<SdpString<'u'> >();
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registerSdpItem<SdpString<'e'> >();
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registerSdpItem<SdpString<'p'> >();
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registerSdpItem<SdpString<'z'> >();
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registerSdpItem<SdpString<'k'> >();
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registerSdpItem<SdpString<'r'> >();
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registerSdpItem<SdpTime>();
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registerSdpItem<SdpOrigin>();
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registerSdpItem<SdpConnection>();
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registerSdpItem<SdpBandwidth>();
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registerSdpItem<SdpMedia>();
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registerSdpItem<SdpAttr>();
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registerSdpItem<SdpAttrGroup>();
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registerSdpItem<SdpAttrMsidSemantic>();
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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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registerSdpItem<SdpAttrExtmap>();
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registerSdpItem<SdpAttrRtpMap>();
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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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registerSdpItem<SdpDirectionRecvonly>();
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registerSdpItem<SdpDirectionSendrecv>();
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registerSdpItem<SdpDirectionInactive>();
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return true;
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}
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static map<string, DtlsRole, StrCaseCompare> dtls_role_map = {
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{"active", DtlsRole::active},
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{"passive", DtlsRole::passive},
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{"actpass", DtlsRole::actpass}
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};
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DtlsRole getDtlsRole(const string &str) {
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auto it = dtls_role_map.find(str);
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return it == dtls_role_map.end() ? DtlsRole::invalid : it->second;
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}
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const char* getDtlsRoleString(DtlsRole role){
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switch (role) {
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case DtlsRole::active : return "active";
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case DtlsRole::passive : return "passive";
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case DtlsRole::actpass : return "actpass";
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default: return "invalid";
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}
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}
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static map<string, RtpDirection, StrCaseCompare> direction_map = {
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{"sendonly", RtpDirection::sendonly},
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{"recvonly", RtpDirection::recvonly},
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{"sendrecv", RtpDirection::sendrecv},
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{"inactive", RtpDirection::inactive}
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};
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RtpDirection getRtpDirection(const string &str) {
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auto it = direction_map.find(str);
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return it == direction_map.end() ? RtpDirection::invalid : it->second;
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}
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const char* getRtpDirectionString(RtpDirection val){
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switch (val) {
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case RtpDirection::sendonly : return "sendonly";
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case RtpDirection::recvonly : return "recvonly";
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case RtpDirection::sendrecv : return "sendrecv";
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case RtpDirection::inactive : return "inactive";
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default: return "invalid";
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}
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}
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//////////////////////////////////////////////////////////////////////////////////////////
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string RtcSdpBase::toString() const {
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_StrPrinter printer;
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for (auto &item : items) {
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printer << item->getKey() << "=" << item->toString() << "\r\n";
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}
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return std::move(printer);
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}
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RtpDirection RtcSdpBase::getDirection() const{
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for (auto &item : items) {
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auto attr = dynamic_pointer_cast<SdpAttr>(item);
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if (attr) {
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auto dir = dynamic_pointer_cast<DirectionInterface>(attr->detail);
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if (dir) {
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return dir->getDirection();
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}
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}
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}
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return RtpDirection::invalid;
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}
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SdpItem::Ptr RtcSdpBase::getItem(char key_c, const char *attr_key) const {
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for (auto item : items) {
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string key(1, key_c);
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if (strcasecmp(item->getKey(), key.data()) == 0) {
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if (!attr_key) {
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return item;
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}
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auto attr = dynamic_pointer_cast<SdpAttr>(item);
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if (attr && !strcasecmp(attr->detail->getKey() , attr_key)) {
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return attr->detail;
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}
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}
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}
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return SdpItem::Ptr();
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}
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int RtcSdpBase::getVersion() const {
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return atoi(getStringItem('v').data());
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}
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SdpOrigin RtcSdpBase::getOrigin() const {
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return getItemClass<SdpOrigin>('o');
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}
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string RtcSdpBase::getSessionName() const {
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return getStringItem('s');
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}
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string RtcSdpBase::getSessionInfo() const {
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return getStringItem('i');
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}
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SdpTime RtcSdpBase::getSessionTime() const{
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return getItemClass<SdpTime>('t');
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}
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SdpConnection RtcSdpBase::getConnection() const {
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return getItemClass<SdpConnection>('c');
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}
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SdpBandwidth RtcSdpBase::getBandwidth() const {
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return getItemClass<SdpBandwidth>('b');
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}
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string RtcSdpBase::getUri() const {
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return getStringItem('u');
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}
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string RtcSdpBase::getEmail() const {
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return getStringItem('e');
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}
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string RtcSdpBase::getPhone() const {
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return getStringItem('p');
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}
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string RtcSdpBase::getTimeZone() const {
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return getStringItem('z');
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}
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string RtcSdpBase::getEncryptKey() const {
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return getStringItem('k');
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}
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string RtcSdpBase::getRepeatTimes() const {
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return getStringItem('r');
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}
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//////////////////////////////////////////////////////////////////////
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void RtcSessionSdp::parse(const string &str) {
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static auto flag = registerAllItem();
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RtcSdpBase *media = nullptr;
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auto lines = split(str, "\n");
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for(auto &line : lines){
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trim(line);
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if(line.size() < 3 || line[1] != '='){
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continue;
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}
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auto key = line.substr(0, 1);
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auto value = line.substr(2);
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if (!strcasecmp(key.data(), "m")) {
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medias.emplace_back(RtcSdpBase());
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media = &medias.back();
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}
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SdpItem::Ptr item;
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auto it = sdpItemCreator.find(key);
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if (it != sdpItemCreator.end()) {
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item = it->second(key, value);
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} else {
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item = std::make_shared<SdpCommon>(key);
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item->parse(value);
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}
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if (media) {
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media->items.push_back(std::move(item));
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} else {
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items.push_back(std::move(item));
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}
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}
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}
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string RtcSessionSdp::toString() const {
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_StrPrinter printer;
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printer << RtcSdpBase::toString();
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for (auto &media : medias) {
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printer << media.toString();
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}
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return std::move(printer);
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}
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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(), "%" SCNu64 " %" SCNu64, &start, &stop) != 2) {
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SDP_THROW();
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}
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}
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string SdpTime::toString() const {
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if (value.empty()) {
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value = to_string(start) + " " + to_string(stop);
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}
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return SdpItem::toString();
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}
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void SdpOrigin::parse(const string &str) {
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auto vec = split(str, " ");
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if (vec.size() != 6) {
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SDP_THROW();
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}
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username = vec[0];
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session_id = vec[1];
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session_version = vec[2];
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nettype = vec[3];
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addrtype = vec[4];
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address = vec[5];
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}
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string SdpOrigin::toString() const {
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if (value.empty()) {
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value = username + " " + session_id + " " + session_version + " " + nettype + " " + addrtype + " " + address;
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}
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return SdpItem::toString();
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}
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void SdpConnection::parse(const string &str) {
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auto vec = split(str, " ");
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if (vec.size() != 3) {
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SDP_THROW();
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}
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nettype = vec[0];
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addrtype = vec[1];
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address = vec[2];
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}
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string SdpConnection::toString() const {
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if (value.empty()) {
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value = nettype + " " + addrtype + " " + address;
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}
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return SdpItem::toString();
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}
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void SdpBandwidth::parse(const string &str) {
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auto vec = split(str, ":");
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if (vec.size() != 2) {
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SDP_THROW();
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}
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bwtype = vec[0];
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bandwidth = atoi(vec[1].data());
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}
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string SdpBandwidth::toString() const {
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if (value.empty()) {
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value = bwtype + ":" + to_string(bandwidth);
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}
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return SdpItem::toString();
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}
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void SdpMedia::parse(const string &str) {
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auto vec = split(str, " ");
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if (vec.size() < 4) {
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SDP_THROW();
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}
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type = getTrackType(vec[0]);
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if (type == TrackInvalid) {
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SDP_THROW();
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}
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port = atoi(vec[1].data());
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proto = vec[2];
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for (size_t i = 3; i < vec.size(); ++i) {
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auto pt = atoi(vec[i].data());
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if (type != TrackApplication && pt > 0xFF) {
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SDP_THROW();
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}
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fmts.emplace_back(pt);
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}
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}
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string SdpMedia::toString() const {
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if (value.empty()) {
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value = string(getTrackString(type)) + " " + to_string(port) + " " + proto;
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for (auto fmt : fmts) {
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value += ' ';
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value += to_string(fmt);
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}
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}
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return SdpItem::toString();
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}
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void SdpAttr::parse(const string &str) {
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auto pos = str.find(':');
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auto key = pos == string::npos ? str : str.substr(0, pos);
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auto value = pos == string::npos ? string() : str.substr(pos + 1);
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auto it = sdpItemCreator.find(key);
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if (it != sdpItemCreator.end()) {
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detail = it->second(key, value);
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} else {
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detail = std::make_shared<SdpCommon>(key);
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detail->parse(value);
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}
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}
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string SdpAttr::toString() const {
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if (value.empty()) {
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auto detail_value = detail->toString();
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if (detail_value.empty()) {
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value = detail->getKey();
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} else {
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value = string(detail->getKey()) + ":" + detail_value;
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}
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}
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return SdpItem::toString();
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}
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void SdpAttrGroup::parse(const string &str) {
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auto vec = split(str, " ");
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if (vec.size() < 2) {
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SDP_THROW();
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}
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type = vec[0];
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vec.erase(vec.begin());
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mids = std::move(vec);
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}
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string SdpAttrGroup::toString() const {
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if (value.empty()) {
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value = type;
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for (auto mid : mids) {
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value += ' ';
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value += mid;
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}
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}
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return SdpItem::toString();
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}
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void SdpAttrMsidSemantic::parse(const string &str) {
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auto vec = split(str, " ");
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if (vec.size() < 1) {
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SDP_THROW();
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}
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msid = vec[0];
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token = vec.size() > 1 ? vec[1] : "";
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}
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string SdpAttrMsidSemantic::toString() const {
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if (value.empty()) {
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if (token.empty()) {
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value = string(" ") + msid;
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} else {
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value = string(" ") + msid + " " + token;
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}
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}
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return SdpItem::toString();
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}
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void SdpAttrRtcp::parse(const string &str) {
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auto vec = split(str, " ");
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if (vec.size() != 4) {
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SDP_THROW();
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}
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port = atoi(vec[0].data());
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nettype = vec[1];
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addrtype = vec[2];
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address = vec[3];
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}
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string SdpAttrRtcp::toString() const {
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if (value.empty()) {
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value = to_string(port) + " " + nettype + " " + addrtype + " " + address;
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}
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return SdpItem::toString();
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}
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void SdpAttrFingerprint::parse(const string &str) {
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auto vec = split(str, " ");
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if (vec.size() != 2) {
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SDP_THROW();
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}
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algorithm = vec[0];
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hash = vec[1];
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}
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string SdpAttrFingerprint::toString() const {
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if (value.empty()) {
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value = algorithm + " " + hash;
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}
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return SdpItem::toString();
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}
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void SdpAttrSetup::parse(const string &str) {
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role = getDtlsRole(str);
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if (role == DtlsRole::invalid) {
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SDP_THROW();
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}
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}
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string SdpAttrSetup::toString() const {
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if (value.empty()) {
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value = getDtlsRoleString(role);
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}
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return SdpItem::toString();
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}
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void SdpAttrExtmap::parse(const string &str) {
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char buf[128] = {0};
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char direction_buf[32] = {0};
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if (sscanf(str.data(), "%" SCNd32 "/%31[^ ] %127s", &index, direction_buf, buf) != 3) {
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if (sscanf(str.data(), "%" SCNd32 " %127s", &index, buf) != 2) {
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SDP_THROW();
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}
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} else {
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direction = getRtpDirection(direction_buf);
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}
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ext = buf;
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}
|
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|
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string SdpAttrExtmap::toString() const {
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if (value.empty()) {
|
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if(direction == RtpDirection::invalid){
|
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value = to_string(index) + " " + ext;
|
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} else {
|
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value = to_string(index) + "/" + getRtpDirectionString(direction) + " " + ext;
|
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}
|
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}
|
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return SdpItem::toString();
|
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}
|
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|
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void SdpAttrRtpMap::parse(const string &str) {
|
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char buf[32] = {0};
|
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if (sscanf(str.data(), "%" SCNu8 " %31[^/]/%" SCNd32 "/%" SCNd32, &pt, buf, &sample_rate, &channel) != 4) {
|
||
if (sscanf(str.data(), "%" SCNu8 " %31[^/]/%" SCNd32, &pt, buf, &sample_rate) != 3) {
|
||
SDP_THROW();
|
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}
|
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}
|
||
codec = buf;
|
||
}
|
||
|
||
string SdpAttrRtpMap::toString() const {
|
||
if (value.empty()) {
|
||
value = to_string(pt) + " " + codec + "/" + to_string(sample_rate);
|
||
if (channel) {
|
||
value += '/';
|
||
value += to_string(channel);
|
||
}
|
||
}
|
||
return SdpItem::toString();
|
||
}
|
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|
||
void SdpAttrRtcpFb::parse(const string &str_in) {
|
||
auto str = str_in + "\n";
|
||
char rtcp_type_buf[32] = {0};
|
||
if (2 != sscanf(str.data(), "%" SCNu8 " %31[^\n]", &pt, rtcp_type_buf)) {
|
||
SDP_THROW();
|
||
}
|
||
rtcp_type = rtcp_type_buf;
|
||
}
|
||
|
||
string SdpAttrRtcpFb::toString() const {
|
||
if (value.empty()) {
|
||
value = to_string(pt) + " " + rtcp_type;
|
||
}
|
||
return SdpItem::toString();
|
||
}
|
||
|
||
void SdpAttrFmtp::parse(const string &str) {
|
||
auto pos = str.find(' ');
|
||
if (pos == string::npos) {
|
||
SDP_THROW();
|
||
}
|
||
pt = atoi(str.substr(0, pos).data());
|
||
auto vec = split(str.substr(pos + 1), ";");
|
||
for (auto &item : vec) {
|
||
trim(item);
|
||
auto pr_vec = split(item, "=");
|
||
if (pr_vec.size() != 2) {
|
||
SDP_THROW();
|
||
}
|
||
arr.emplace_back(std::make_pair(pr_vec[0], pr_vec[1]));
|
||
}
|
||
if (arr.empty()) {
|
||
SDP_THROW();
|
||
}
|
||
}
|
||
|
||
string SdpAttrFmtp::toString() const {
|
||
if (value.empty()) {
|
||
value = to_string(pt);
|
||
int i = 0;
|
||
for (auto &pr : arr) {
|
||
value += (i++ ? ';' : ' ');
|
||
value += pr.first + "=" + pr.second;
|
||
}
|
||
}
|
||
return SdpItem::toString();
|
||
}
|
||
|
||
void SdpAttrSSRC::parse(const string &str_in) {
|
||
auto str = str_in + '\n';
|
||
char attr_buf[32] = {0};
|
||
char attr_val_buf[128] = {0};
|
||
if (3 == sscanf(str.data(), "%" SCNu32 " %31[^:]:%127[^\n]", &ssrc, attr_buf, attr_val_buf)) {
|
||
attribute = attr_buf;
|
||
attribute_value = attr_val_buf;
|
||
} else if (2 == sscanf(str.data(), "%" SCNu32 " %31s[^\n]", &ssrc, attr_buf)) {
|
||
attribute = attr_buf;
|
||
} else {
|
||
SDP_THROW();
|
||
}
|
||
}
|
||
|
||
string SdpAttrSSRC::toString() const {
|
||
if (value.empty()) {
|
||
value = to_string(ssrc) + ' ';
|
||
value += attribute;
|
||
if (!attribute_value.empty()) {
|
||
value += ':';
|
||
value += attribute_value;
|
||
}
|
||
}
|
||
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(), "%" SCNu16 " %63[^ ] %" SCNd32, &port, subtypes_buf, &streams)) {
|
||
subtypes = subtypes_buf;
|
||
} else {
|
||
SDP_THROW();
|
||
}
|
||
}
|
||
|
||
string SdpAttrSctpMap::toString() const {
|
||
if (value.empty()) {
|
||
value = to_string(port);
|
||
value += ' ';
|
||
value += subtypes;
|
||
value += ' ';
|
||
value += to_string(streams);
|
||
}
|
||
return SdpItem::toString();
|
||
}
|
||
|
||
void SdpAttrCandidate::parse(const string &str) {
|
||
char foundation_buf[32] = {0};
|
||
char transport_buf[16] = {0};
|
||
char address_buf[32] = {0};
|
||
char type_buf[16] = {0};
|
||
|
||
if (7 != sscanf(str.data(), "%31[^ ] %" SCNu32 " %15[^ ] %" SCNu32 " %31[^ ] %" SCNu16 " typ %15[^ ]",
|
||
foundation_buf, &component, transport_buf, &priority, address_buf, &port, type_buf)) {
|
||
SDP_THROW();
|
||
}
|
||
foundation = foundation_buf;
|
||
transport = transport_buf;
|
||
address = address_buf;
|
||
type = type_buf;
|
||
auto pos = str.find(type);
|
||
if (pos != string::npos) {
|
||
auto remain = str.substr(pos + type.size());
|
||
trim(remain);
|
||
if (!remain.empty()) {
|
||
auto vec = split(remain, " ");
|
||
string key;
|
||
for (auto &item : vec) {
|
||
if (key.empty()) {
|
||
key = item;
|
||
} else {
|
||
arr.emplace_back(std::make_pair(std::move(key), std::move(item)));
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
string SdpAttrCandidate::toString() const {
|
||
if (value.empty()) {
|
||
value = foundation + " " + to_string(component) + " " + transport + " " + to_string(priority) +
|
||
" " + address + " " + to_string(port) + " typ " + type;
|
||
for (auto &pr : arr) {
|
||
value += ' ';
|
||
value += pr.first;
|
||
value += ' ';
|
||
value += pr.second;
|
||
}
|
||
}
|
||
return SdpItem::toString();
|
||
}
|
||
|
||
void test_sdp(){
|
||
char str1[] = "v=0\n"
|
||
"o=- 380154348540553537 2 IN IP4 127.0.0.1\n"
|
||
"s=-\n"
|
||
"b=CT:1900\n"
|
||
"t=0 0\n"
|
||
"a=group:BUNDLE video\n"
|
||
"a=msid-semantic: WMS\n"
|
||
"m=video 9 RTP/SAVPF 96\n"
|
||
"c=IN IP4 0.0.0.0\n"
|
||
"a=rtcp:9 IN IP4 0.0.0.0\n"
|
||
"a=ice-ufrag:1ZFN\n"
|
||
"a=ice-pwd:70P3H0jPlGz1fiJl5XZfXMZH\n"
|
||
"a=ice-options:trickle\n"
|
||
"a=fingerprint:sha-256 3E:10:35:6B:9A:9E:B0:55:AC:2A:88:F5:74:C1:70:32:B5:8D:88:1D:37:B0:9C:69:A6:DD:07:10:73:27:1A:16\n"
|
||
"a=setup:active\n"
|
||
"a=mid:video\n"
|
||
"a=recvonly\n"
|
||
"a=rtcp-mux\n"
|
||
"a=rtpmap:96 H264/90000\n"
|
||
"a=fmtp:96 level-asymmetry-allowed=1;packetization-mode=0;profile-level-id=42e01f";
|
||
char str2[] = "v=0\n"
|
||
"o=- 2584450093346841581 2 IN IP4 127.0.0.1\n"
|
||
"s=-\n"
|
||
"t=0 0\n"
|
||
"a=group:BUNDLE audio video data\n"
|
||
"a=msid-semantic: WMS 616cfbb1-33a3-4d8c-8275-a199d6005549\n"
|
||
"m=audio 9 UDP/TLS/RTP/SAVPF 111 103 104 9 0 8 106 105 13 110 112 113 126\n"
|
||
"c=IN IP4 0.0.0.0\n"
|
||
"a=rtcp:9 IN IP4 0.0.0.0\n"
|
||
"a=ice-ufrag:sXJ3\n"
|
||
"a=ice-pwd:yEclOTrLg1gEubBFefOqtmyV\n"
|
||
"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\n"
|
||
"a=setup:actpass\n"
|
||
"a=mid:audio\n"
|
||
"a=extmap:1/sendonly urn:ietf:params:rtp-hdrext:ssrc-audio-level\n"
|
||
"a=sendrecv\n"
|
||
"a=rtcp-mux\n"
|
||
"a=rtpmap:111 opus/48000/2\n"
|
||
"a=rtcp-fb:111 transport-cc\n"
|
||
"a=fmtp:111 minptime=10;useinbandfec=1\n"
|
||
"a=rtpmap:103 ISAC/16000\n"
|
||
"a=rtpmap:104 ISAC/32000\n"
|
||
"a=rtpmap:9 G722/8000\n"
|
||
"a=rtpmap:0 PCMU/8000\n"
|
||
"a=rtpmap:8 PCMA/8000\n"
|
||
"a=rtpmap:106 CN/32000\n"
|
||
"a=rtpmap:105 CN/16000\n"
|
||
"a=rtpmap:13 CN/8000\n"
|
||
"a=rtpmap:110 telephone-event/48000\n"
|
||
"a=rtpmap:112 telephone-event/32000\n"
|
||
"a=rtpmap:113 telephone-event/16000\n"
|
||
"a=rtpmap:126 telephone-event/8000\n"
|
||
"a=ssrc:120276603 cname:iSkJ2vn5cYYubTve\n"
|
||
"a=ssrc:120276603 msid:616cfbb1-33a3-4d8c-8275-a199d6005549 1da3d329-7399-4fe9-b20f-69606bebd363\n"
|
||
"a=ssrc:120276603 mslabel:616cfbb1-33a3-4d8c-8275-a199d6005549\n"
|
||
"a=ssrc:120276603 label:1da3d329-7399-4fe9-b20f-69606bebd363\n"
|
||
"m=video 9 UDP/TLS/RTP/SAVPF 96 98 100 102 127 97 99 101 125\n"
|
||
"c=IN IP4 0.0.0.0\n"
|
||
"a=rtcp:9 IN IP4 0.0.0.0\n"
|
||
"a=ice-ufrag:sXJ3\n"
|
||
"a=ice-pwd:yEclOTrLg1gEubBFefOqtmyV\n"
|
||
"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\n"
|
||
"a=setup:actpass\n"
|
||
"a=mid:video\n"
|
||
"a=extmap:2 urn:ietf:params:rtp-hdrext:toffset\n"
|
||
"a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time\n"
|
||
"a=extmap:4 urn:3gpp:video-orientation\n"
|
||
"a=extmap:5 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01\n"
|
||
"a=extmap:6 http://www.webrtc.org/experiments/rtp-hdrext/playout-delay\n"
|
||
"a=sendrecv\n"
|
||
"a=rtcp-mux\n"
|
||
"a=rtcp-rsize\n"
|
||
"a=rtpmap:96 VP8/90000\n"
|
||
"a=rtcp-fb:96 ccm fir\n"
|
||
"a=rtcp-fb:96 nack\n"
|
||
"a=rtcp-fb:96 nack pli\n"
|
||
"a=rtcp-fb:96 goog-remb\n"
|
||
"a=rtcp-fb:96 transport-cc\n"
|
||
"a=rtpmap:98 VP9/90000\n"
|
||
"a=rtcp-fb:98 ccm fir\n"
|
||
"a=rtcp-fb:98 nack\n"
|
||
"a=rtcp-fb:98 nack pli\n"
|
||
"a=rtcp-fb:98 goog-remb\n"
|
||
"a=rtcp-fb:98 transport-cc\n"
|
||
"a=rtpmap:100 H264/90000\n"
|
||
"a=rtcp-fb:100 ccm fir\n"
|
||
"a=rtcp-fb:100 nack\n"
|
||
"a=rtcp-fb:100 nack pli\n"
|
||
"a=rtcp-fb:100 goog-remb\n"
|
||
"a=rtcp-fb:100 transport-cc\n"
|
||
"a=fmtp:100 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f\n"
|
||
"a=rtpmap:102 red/90000\n"
|
||
"a=rtpmap:127 ulpfec/90000\n"
|
||
"a=rtpmap:97 rtx/90000\n"
|
||
"a=fmtp:97 apt=96\n"
|
||
"a=rtpmap:99 rtx/90000\n"
|
||
"a=fmtp:99 apt=98\n"
|
||
"a=rtpmap:101 rtx/90000\n"
|
||
"a=fmtp:101 apt=100\n"
|
||
"a=rtpmap:125 rtx/90000\n"
|
||
"a=fmtp:125 apt=102\n"
|
||
"a=ssrc-group:FID 2580761338 611523443\n"
|
||
"a=ssrc:2580761338 cname:iSkJ2vn5cYYubTve\n"
|
||
"a=ssrc:2580761338 msid:616cfbb1-33a3-4d8c-8275-a199d6005549 bf270496-a23e-47b5-b901-ef23096cd961\n"
|
||
"a=ssrc:2580761338 mslabel:616cfbb1-33a3-4d8c-8275-a199d6005549\n"
|
||
"a=ssrc:2580761338 label:bf270496-a23e-47b5-b901-ef23096cd961\n"
|
||
"a=ssrc:611523443 cname:iSkJ2vn5cYYubTve\n"
|
||
"a=ssrc:611523443 msid:616cfbb1-33a3-4d8c-8275-a199d6005549 bf270496-a23e-47b5-b901-ef23096cd961\n"
|
||
"a=ssrc:611523443 mslabel:616cfbb1-33a3-4d8c-8275-a199d6005549\n"
|
||
"a=ssrc:611523443 label:bf270496-a23e-47b5-b901-ef23096cd961\n"
|
||
"a=candidate:3575467457 1 udp 2113937151 10.15.83.23 57857 typ host generation 0 ufrag 6R0z network-cost 999\n"
|
||
"m=application 9 DTLS/SCTP 5000\n"
|
||
"c=IN IP4 0.0.0.0\n"
|
||
"a=ice-ufrag:sXJ3\n"
|
||
"a=ice-pwd:yEclOTrLg1gEubBFefOqtmyV\n"
|
||
"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\n"
|
||
"a=setup:actpass\n"
|
||
"a=mid:data\n"
|
||
"a=sctpmap:5000 webrtc-datachannel 1024\n"
|
||
"a=sctp-port:5000";
|
||
|
||
RtcSessionSdp sdp1;
|
||
sdp1.parse(str1);
|
||
|
||
RtcSessionSdp sdp2;
|
||
sdp2.parse(str2);
|
||
|
||
for (auto media : sdp1.medias) {
|
||
InfoL << getRtpDirectionString(media.getDirection());
|
||
}
|
||
for (auto media : sdp2.medias) {
|
||
InfoL << getRtpDirectionString(media.getDirection());
|
||
}
|
||
InfoL << sdp1.toString();
|
||
InfoL << sdp2.toString();
|
||
|
||
RtcSession session1;
|
||
session1.loadFrom(str1);
|
||
|
||
RtcSession session2;
|
||
session2.loadFrom(str2);
|
||
InfoL;
|
||
}
|
||
|
||
void RtcSession::loadFrom(const string &str) {
|
||
RtcSessionSdp sdp;
|
||
sdp.parse(str);
|
||
|
||
version = sdp.getVersion();
|
||
origin = sdp.getOrigin();
|
||
session_name = sdp.getSessionName();
|
||
session_info = sdp.getSessionInfo();
|
||
connection = sdp.getConnection();
|
||
bandwidth = sdp.getBandwidth();
|
||
time = sdp.getSessionTime();
|
||
msid_semantic = sdp.getItemClass<SdpAttrMsidSemantic>('a', "msid-semantic");
|
||
for (auto &media : sdp.medias) {
|
||
auto mline = media.getItemClass<SdpMedia>('m');
|
||
switch (mline.type) {
|
||
case TrackVideo:
|
||
case TrackAudio:
|
||
case TrackApplication: break;
|
||
default: throw std::invalid_argument(StrPrinter << "不识别的media类型:" << mline.toString());
|
||
}
|
||
this->media.emplace_back();
|
||
auto &rtc_media = this->media.back();
|
||
rtc_media.type = mline.type;
|
||
rtc_media.mid = media.getStringItem('a', "mid");
|
||
rtc_media.proto = mline.proto;
|
||
rtc_media.type = mline.type;
|
||
rtc_media.port = mline.port;
|
||
rtc_media.addr = media.getItemClass<SdpConnection>('c');
|
||
rtc_media.ice_ufrag = media.getStringItem('a', "ice-ufrag");
|
||
rtc_media.ice_pwd = media.getStringItem('a', "ice-pwd");
|
||
rtc_media.role = media.getItemClass<SdpAttrSetup>('a', "setup").role;
|
||
rtc_media.fingerprint = media.getItemClass<SdpAttrFingerprint>('a', "fingerprint");
|
||
rtc_media.ice_trickle = media.getItem('a', "ice-trickle").operator bool();
|
||
rtc_media.ice_lite = media.getItem('a', "ice-lite").operator bool();
|
||
rtc_media.ice_renomination = media.getItem('a', "ice-renomination").operator bool();
|
||
rtc_media.candidate = media.getAllItem<SdpAttrCandidate>('a', "candidate");
|
||
|
||
if (mline.type == TrackType::TrackApplication) {
|
||
rtc_media.sctp_port = atoi(media.getStringItem('a', "sctp-port").data());
|
||
rtc_media.sctpmap = media.getItemClass<SdpAttrSctpMap>('a', "sctpmap");
|
||
continue;
|
||
}
|
||
rtc_media.rtcp_addr = media.getItemClass<SdpAttrRtcp>('a', "rtcp");
|
||
rtc_media.direction = media.getDirection();
|
||
rtc_media.extmap = media.getAllItem<SdpAttrExtmap>('a', "extmap");
|
||
rtc_media.rtcp_mux = media.getItem('a', "rtcp-mux").operator bool();
|
||
rtc_media.rtcp_rsize = media.getItem('a', "rtcp-rsize").operator bool();
|
||
|
||
map<uint32_t, RtcSSRC> rtc_ssrc_map;
|
||
for (auto &ssrc : media.getAllItem<SdpAttrSSRC>('a', "ssrc")) {
|
||
auto &rtc_ssrc = rtc_ssrc_map[ssrc.ssrc];
|
||
rtc_ssrc.ssrc = ssrc.ssrc;
|
||
if (!strcasecmp(ssrc.attribute.data(), "cname")) {
|
||
rtc_ssrc.cname = ssrc.attribute_value;
|
||
continue;
|
||
}
|
||
if (!strcasecmp(ssrc.attribute.data(), "msid")) {
|
||
rtc_ssrc.msid = ssrc.attribute_value;
|
||
continue;
|
||
}
|
||
if (!strcasecmp(ssrc.attribute.data(), "mslabel")) {
|
||
rtc_ssrc.mslabel = ssrc.attribute_value;
|
||
continue;
|
||
}
|
||
if (!strcasecmp(ssrc.attribute.data(), "label")) {
|
||
rtc_ssrc.label = ssrc.attribute_value;
|
||
continue;
|
||
}
|
||
}
|
||
|
||
uint32_t ssrc_rtp = 0, ssrc_rtx = 0, ssrc_rtp_low = 0, ssrc_rtp_mid = 0, ssrc_rtp_high = 0;
|
||
auto ssrc_groups = media.getAllItem<SdpAttrSSRCGroup>('a', "ssrc-group");
|
||
for (auto &group : ssrc_groups) {
|
||
if (group.isFID()) {
|
||
ssrc_rtp = group.u.fid.rtp_ssrc;
|
||
ssrc_rtx = group.u.fid.rtx_ssrc;
|
||
} else if (group.isSIM()) {
|
||
ssrc_rtp_low = group.u.sim.rtp_ssrc_low;
|
||
ssrc_rtp_mid = group.u.sim.rtp_ssrc_mid;
|
||
ssrc_rtp_high = group.u.sim.rtp_ssrc_high;
|
||
}
|
||
}
|
||
|
||
if (!ssrc_rtp) {
|
||
//没有指定ssrc-group字段，那么只有一个ssrc
|
||
if (rtc_ssrc_map.size() > 1) {
|
||
throw std::invalid_argument("sdp中不存在a=ssrc-group:FID字段,但是ssrc却有多个");
|
||
}
|
||
ssrc_rtp = rtc_ssrc_map.begin()->second.ssrc;
|
||
}
|
||
for (auto &pr : rtc_ssrc_map) {
|
||
auto &rtc_ssrc = pr.second;
|
||
if (rtc_ssrc.ssrc == ssrc_rtp) {
|
||
rtc_media.rtp_ssrc = rtc_ssrc;
|
||
}
|
||
if (rtc_ssrc.ssrc == ssrc_rtx) {
|
||
rtc_media.rtx_ssrc = rtc_ssrc;
|
||
}
|
||
if (rtc_ssrc.ssrc == ssrc_rtp_low) {
|
||
rtc_media.rtp_ssrc_low = rtc_ssrc;
|
||
}
|
||
if (rtc_ssrc.ssrc == ssrc_rtp_mid) {
|
||
rtc_media.rtp_ssrc_mid = rtc_ssrc;
|
||
}
|
||
if (rtc_ssrc.ssrc == ssrc_rtp_high) {
|
||
rtc_media.rtp_ssrc_high = rtc_ssrc;
|
||
}
|
||
}
|
||
|
||
auto rtpmap_arr = media.getAllItem<SdpAttrRtpMap>('a', "rtpmap");
|
||
auto rtcpfb_arr = media.getAllItem<SdpAttrRtcpFb>('a', "rtcp-fb");
|
||
auto fmtp_aar = media.getAllItem<SdpAttrFmtp>('a', "fmtp");
|
||
//方便根据pt查找rtpmap,一个pt必有一条
|
||
map<uint8_t, SdpAttrRtpMap &> rtpmap_map;
|
||
//方便根据pt查找rtcp-fb,一个pt可能有多条或0条
|
||
multimap<uint8_t, SdpAttrRtcpFb &> rtcpfb_map;
|
||
//方便根据pt查找fmtp，一个pt最多一条
|
||
map<uint8_t, SdpAttrFmtp &> fmtp_map;
|
||
|
||
for (auto &rtpmap : rtpmap_arr) {
|
||
if (!rtpmap_map.emplace(rtpmap.pt, rtpmap).second) {
|
||
//添加失败，有多条
|
||
throw std::invalid_argument(StrPrinter << "该pt存在多条a=rtpmap:" << rtpmap.pt);
|
||
}
|
||
}
|
||
for (auto &rtpfb : rtcpfb_arr) {
|
||
rtcpfb_map.emplace(rtpfb.pt, rtpfb);
|
||
}
|
||
for (auto &fmtp : fmtp_aar) {
|
||
if (!fmtp_map.emplace(fmtp.pt, fmtp).second) {
|
||
//添加失败，有多条
|
||
throw std::invalid_argument(StrPrinter << "该pt存在多条a=fmtp:" << fmtp.pt);
|
||
}
|
||
}
|
||
for (auto &pt : mline.fmts) {
|
||
//遍历所有编码方案的pt
|
||
rtc_media.plan.emplace_back();
|
||
auto &plan = rtc_media.plan.back();
|
||
auto rtpmap_it = rtpmap_map.find(pt);
|
||
if (rtpmap_it == rtpmap_map.end()) {
|
||
throw std::invalid_argument(StrPrinter << "该pt不存在相对于的a=rtpmap:" << pt);
|
||
}
|
||
plan.pt = rtpmap_it->second.pt;
|
||
plan.codec = rtpmap_it->second.codec;
|
||
plan.sample_rate = rtpmap_it->second.sample_rate;
|
||
plan.channel = rtpmap_it->second.channel;
|
||
auto fmtp_it = fmtp_map.find(pt);
|
||
if (fmtp_it != fmtp_map.end()) {
|
||
plan.fmtp = fmtp_it->second.arr;
|
||
}
|
||
for (auto rtpfb_it = rtcpfb_map.find(pt);
|
||
rtpfb_it != rtcpfb_map.end() && rtpfb_it->second.pt == pt; ++rtpfb_it) {
|
||
plan.rtcp_fb.emplace_back(rtpfb_it->second.rtcp_type);
|
||
}
|
||
}
|
||
}
|
||
|
||
group = sdp.getItemClass<SdpAttrGroup>('a', "group");
|
||
checkValid();
|
||
}
|
||
|
||
string RtcCodecPlan::getFmtp(const char *key) const{
|
||
for (auto &item : fmtp) {
|
||
if (strcasecmp(item.first.data(), key) == 0) {
|
||
return item.second;
|
||
}
|
||
}
|
||
return "";
|
||
}
|
||
|
||
const RtcCodecPlan *RtcMedia::getPlan(uint8_t pt) const{
|
||
for (auto &item : plan) {
|
||
if (item.pt == pt) {
|
||
return &item;
|
||
}
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
const RtcCodecPlan *RtcMedia::getPlan(const char *codec) const{
|
||
for (auto &item : plan) {
|
||
if (strcasecmp(item.codec.data(), codec) == 0) {
|
||
return &item;
|
||
}
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
const RtcCodecPlan *RtcMedia::getRelatedRtxPlan(uint8_t pt) const{
|
||
for (auto &item : plan) {
|
||
if (strcasecmp(item.codec.data(), "rtx") == 0) {
|
||
auto apt = atoi(item.getFmtp("apt").data());
|
||
if (pt == apt) {
|
||
return &item;
|
||
}
|
||
}
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
void RtcMedia::checkValid() const{
|
||
CHECK(type != TrackInvalid);
|
||
CHECK(!mid.empty());
|
||
CHECK(!proto.empty());
|
||
CHECK(direction != RtpDirection::invalid || type == TrackApplication);
|
||
CHECK(!plan.empty() || type == TrackApplication );
|
||
bool send_rtp = (direction == RtpDirection::sendonly || direction == RtpDirection::sendrecv);
|
||
CHECK(!rtp_ssrc.empty() || !send_rtp);
|
||
auto rtx_plan = getPlan("rtx");
|
||
if (rtx_plan) {
|
||
//开启rtx后必须指定rtx_ssrc
|
||
CHECK(!rtx_ssrc.empty() || !send_rtp);
|
||
}
|
||
}
|
||
|
||
void RtcSession::checkValid() const{
|
||
CHECK(version == 0);
|
||
CHECK(!origin.empty());
|
||
CHECK(!session_name.empty());
|
||
CHECK(!msid_semantic.empty());
|
||
CHECK(!media.empty());
|
||
CHECK(group.mids.size() <= media.size());
|
||
for (auto &item : media) {
|
||
item.checkValid();
|
||
}
|
||
} |