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基本完成sdp的解析和生成

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This commit is contained in:
xiongziliang 2021-03-28 17:32:53 +08:00
parent f4746d161c
commit 81f29fea61
3 changed files with 650 additions and 225 deletions
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2
src/Extension/Frame.h
View File

@ -38,7 +38,7 @@ typedef enum {
TrackVideo = 0,
TrackAudio,
TrackTitle,
TrackData,
TrackApplication,
TrackMax = 4
} TrackType;

535
webrtc/Sdp.cpp
View File

@ -3,6 +3,7 @@
//
#include "Sdp.h"
#include <inttypes.h>
using onCreateSdpItem = function<SdpItem::Ptr(const string &key, const string &value)>;
static unordered_map<string, onCreateSdpItem> sdpItemCreator;
@ -15,10 +16,38 @@ void registerSdpItem(){
return ret;
};
Item item;
InfoL << "register sdp item:" << item.getKey();
sdpItemCreator.emplace(item.getKey(), std::move(func));
}
class DirectionInterface {
public:
virtual RtpDirection getDirection() = 0;
};
class SdpDirectionSendonly : public SdpItem, public DirectionInterface{
public:
const char* getKey() override { return getRtpDirectionString(getDirection());}
RtpDirection getDirection() override {return RtpDirection::sendonly;}
};
class SdpDirectionRecvonly : public SdpItem, public DirectionInterface{
public:
const char* getKey() override { return getRtpDirectionString(getDirection());}
RtpDirection getDirection() override {return RtpDirection::recvonly;}
};
class SdpDirectionSendrecv : public SdpItem, public DirectionInterface{
public:
const char* getKey() override { return getRtpDirectionString(getDirection());}
RtpDirection getDirection() override {return RtpDirection::sendrecv;}
};
class SdpDirectionInactive : public SdpItem, public DirectionInterface{
public:
const char* getKey() override { return getRtpDirectionString(getDirection());}
RtpDirection getDirection() override {return RtpDirection::inactive;}
};
static bool registerAllItem(){
registerSdpItem<SdpString<'v'> >();
registerSdpItem<SdpString<'s'> >();
@ -49,9 +78,87 @@ static bool registerAllItem(){
registerSdpItem<SdpAttrFmtp>();
registerSdpItem<SdpAttrSSRC>();
registerSdpItem<SdpAttrSctpMap>();
registerSdpItem<SdpAttrCandidate>();
registerSdpItem<SdpDirectionSendonly>();
registerSdpItem<SdpDirectionRecvonly>();
registerSdpItem<SdpDirectionSendrecv>();
registerSdpItem<SdpDirectionInactive>();
return true;
}
TrackType getTrackType(const string &str){
if (str == "video") {
return TrackVideo;
}
if (str == "audio") {
return TrackAudio;
}
if (str == "application") {
return TrackApplication;
}
return TrackInvalid;
}
const char* getTrackString(TrackType type){
switch (type) {
case TrackVideo : return "video";
case TrackAudio : return "audio";
case TrackApplication : return "application";
default: return "invalid";
}
}
DtlsRole getDtlsRole(const string &str){
if (str == "active") {
return DtlsRole::active;
}
if (str == "passive") {
return DtlsRole::passive;
}
if (str == "actpass") {
return DtlsRole::actpass;
}
return DtlsRole::invalid;
}
const char* getDtlsRoleString(DtlsRole role){
switch (role) {
case DtlsRole::active : return "active";
case DtlsRole::passive : return "passive";
case DtlsRole::actpass : return "actpass";
default: return "invalid";
}
}
RtpDirection getRtpDirection(const string &str){
if (str == "sendonly") {
return RtpDirection::sendonly;
}
if (str == "recvonly") {
return RtpDirection::recvonly;
}
if (str == "sendrecv") {
return RtpDirection::sendrecv;
}
if (str == "inactive") {
return RtpDirection::inactive;
}
return RtpDirection::invalid;
}
const char* getRtpDirectionString(RtpDirection val){
switch (val) {
case RtpDirection::sendonly : return "sendonly";
case RtpDirection::recvonly : return "recvonly";
case RtpDirection::sendrecv : return "sendrecv";
case RtpDirection::inactive : return "inactive";
default: return "invalid";
}
}
//////////////////////////////////////////////////////////////////////////////////////////
void RtcSdp::parse(const string &str) {
static auto flag = registerAllItem();
RtcMedia *media = nullptr;
@ -85,11 +192,142 @@ void RtcSdp::parse(const string &str) {
}
string RtcSdp::toString() const {
return std::string();
_StrPrinter printer;
for (auto &item : items) {
printer << item->getKey() << "=" << item->toString() << "\r\n";
}
for (auto &media : medias) {
printer << media.toString();
}
return std::move(printer);
}
//////////////////////////////////////////////////////////////////////
string RtcMedia::toString() const {
_StrPrinter printer;
for (auto &item : items) {
printer << item->getKey() << "=" << item->toString() << "\r\n";
}
return std::move(printer);
}
RtpDirection RtcMedia::getDirection() const{
for (auto &item : items) {
auto attr = dynamic_pointer_cast<SdpAttr>(item);
if (attr) {
auto dir = dynamic_pointer_cast<DirectionInterface>(attr->detail);
if (dir) {
return dir->getDirection();
}
}
}
return RtpDirection::invalid;
}
//////////////////////////////////////////////////////////////////////////////////////////
#define SDP_THROW() throw std::invalid_argument(StrPrinter << "解析sdp " << getKey() << " 字段失败:" << str)
void SdpTime::parse(const string &str) {
if (sscanf(str.data(), "%" PRIu64 " %" PRIu64, &start, &stop) != 2) {
SDP_THROW();
}
}
string SdpTime::toString() const {
if (value.empty()) {
value = to_string(start) + " " + to_string(stop);
}
return SdpItem::toString();
}
void SdpOrigin::parse(const string &str) {
auto vec = split(str, " ");
if (vec.size() != 6) {
SDP_THROW();
}
username = vec[0];
session_id = vec[1];
session_version = vec[2];
nettype = vec[3];
addrtype = vec[4];
address = vec[6];
}
string SdpOrigin::toString() const {
if (value.empty()) {
value = username + " " + session_id + " " + session_version + " " + nettype + " " + addrtype + " " + address;
}
return SdpItem::toString();
}
void SdpConnection::parse(const string &str) {
auto vec = split(str, " ");
if (vec.size() != 3) {
SDP_THROW();
}
nettype = vec[0];
addrtype = vec[1];
address = vec[2];
}
string SdpConnection::toString() const {
if (value.empty()) {
value = nettype + " " + addrtype + " " + address;
}
return SdpItem::toString();
}
void SdpBandwidth::parse(const string &str) {
auto vec = split(str, ":");
if (vec.size() != 2) {
SDP_THROW();
}
bwtype = vec[0];
bandwidth = atoi(vec[1].data());
}
string SdpBandwidth::toString() const {
if (value.empty()) {
value = bwtype + ":" + to_string(bandwidth);
}
return SdpItem::toString();
}
void SdpMedia::parse(const string &str) {
auto vec = split(str, " ");
if (vec.size() < 4) {
SDP_THROW();
}
type = getTrackType(vec[0]);
if (type == TrackInvalid) {
SDP_THROW();
}
port = atoi(vec[1].data());
proto = vec[2];
for (int i = 3; i < vec.size(); ++i) {
auto pt = atoi(vec[i].data());
if (type != TrackApplication && pt > 0xFF) {
SDP_THROW();
}
fmts.emplace_back(pt);
}
}
string SdpMedia::toString() const {
if (value.empty()) {
value = string(getTrackString(type)) + " " + to_string(port) + " " + proto;
for (auto fmt : fmts) {
value += ' ';
value += to_string(fmt);
}
}
return SdpItem::toString();
}
void SdpAttr::parse(const string &str) {
SdpItem::parse(str);
auto pos = str.find(':');
auto key = pos == string::npos ? str : str.substr(0, pos);
auto value = pos == string::npos ? string() : str.substr(pos + 1);
@ -102,10 +340,290 @@ void SdpAttr::parse(const string &str) {
}
}
string SdpAttr::toString() const {
if (value.empty()) {
auto detail_value = detail->toString();
if (detail_value.empty()) {
value = detail->getKey();
} else {
value = string(detail->getKey()) + ":" + detail_value;
}
}
return SdpItem::toString();
}
void SdpAttrGroup::parse(const string &str) {
auto vec = split(str, " ");
if (vec.size() < 2) {
SDP_THROW();
}
type = vec[0];
vec.erase(vec.begin());
mids = std::move(vec);
}
string SdpAttrGroup::toString() const {
if (value.empty()) {
value = type;
for (auto mid : mids) {
value += ' ';
value += mid;
}
}
return SdpItem::toString();
}
void SdpAttrMsidSemantic::parse(const string &str) {
auto vec = split(str, " ");
if (vec.size() < 1) {
SDP_THROW();
}
msid = vec[0];
token = vec.size() > 1 ? vec[1] : "";
}
string SdpAttrMsidSemantic::toString() const {
if (value.empty()) {
if (token.empty()) {
value = string(" ") + msid;
} else {
value = string(" ") + msid + " " + token;
}
}
return SdpItem::toString();
}
void SdpAttrRtcp::parse(const string &str) {
auto vec = split(str, " ");
if (vec.size() != 4) {
SDP_THROW();
}
port = atoi(vec[0].data());
nettype = vec[1];
addrtype = vec[2];
address = vec[3];
}
string SdpAttrRtcp::toString() const {
if (value.empty()) {
value = to_string(port) + " " + nettype + " " + addrtype + " " + address;
}
return SdpItem::toString();
}
void SdpAttrFingerprint::parse(const string &str) {
auto vec = split(str, " ");
if (vec.size() != 2) {
SDP_THROW();
}
algorithm = vec[0];
hash = vec[1];
}
string SdpAttrFingerprint::toString() const {
if (value.empty()) {
value = algorithm + " " + hash;
}
return SdpItem::toString();
}
void SdpAttrSetup::parse(const string &str) {
role = getDtlsRole(str);
if (role == DtlsRole::invalid) {
SDP_THROW();
}
}
string SdpAttrSetup::toString() const {
if (value.empty()) {
value = getDtlsRoleString(role);
}
return SdpItem::toString();
}
void SdpAttrExtmap::parse(const string &str) {
char buf[128] = {0};
if (sscanf(str.data(), "%" PRId32 " %127s", &index, buf) != 2) {
SDP_THROW();
}
ext = buf;
}
string SdpAttrExtmap::toString() const {
if (value.empty()) {
value = to_string(index) + " " + ext;
}
return SdpItem::toString();
}
void SdpAttrRtpMap::parse(const string &str) {
char buf[32] = {0};
if (sscanf(str.data(), "%" PRId8 " %31[^/]/%" PRId32 "/%" PRId32, &pt, buf, &sample_rate, &channel) != 4) {
if (sscanf(str.data(), "%" PRId8 " %31[^/]/%" PRId32, &pt, buf, &sample_rate) != 3) {
SDP_THROW();
}
}
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();
}
void SdpAttrRtcpFb::parse(const string &str) {
auto vec = split(str, " ");
if (vec.size() < 2) {
SDP_THROW();
}
pt = atoi(vec[0].data());
vec.erase(vec.begin());
arr = std::move(vec);
}
string SdpAttrRtcpFb::toString() const {
if (value.empty()) {
value = to_string(pt);
for (auto &item : arr) {
value += ' ';
value += item;
}
}
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) {
char attr_buf[32] = {0};
char attr_val_buf[128] = {0};
if (3 == sscanf(str.data(), "%" PRIu32 " %31[^:]:%127[^\0]", &ssrc, attr_buf, attr_val_buf)) {
attribute = attr_buf;
attribute_value = attr_val_buf;
} else if (2 == sscanf(str.data(), "%" PRIu32 " %31s", &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 SdpAttrSctpMap::parse(const string &str) {
char subtypes_buf[64] = {0};
if (3 == sscanf(str.data(), "%" PRIu16 " %63[^ ] %" PRId32, &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 transport_buf[16] = {0};
char address_buf[32] = {0};
char type_buf[16] = {0};
if (7 != sscanf(str.data(), "%" PRIu32 " %" PRIu32 " %15[^ ] %" PRIu32 " %31[^ ] %" PRIu16 " typ %15[^ \0]",
&foundation, &component, transport_buf, &priority, address_buf, &port, type_buf)) {
SDP_THROW();
}
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 = to_string(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"
@ -212,7 +730,7 @@ void test_sdp(){
"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:1 1 udp %u %s %u typ host\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"
@ -220,7 +738,8 @@ void test_sdp(){
"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";
"a=sctpmap:5000 webrtc-datachannel 1024\n"
"a=sctp-port:5000";
RtcSdp sdp1;
sdp1.parse(str1);
@ -228,6 +747,12 @@ void test_sdp(){
RtcSdp 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();
}

338
webrtc/Sdp.h
View File

@ -12,107 +12,6 @@ using namespace std;
using namespace mediakit;
//https://datatracker.ietf.org/doc/rfc4566/?include_text=1
//v=0
//o=- 2584450093346841581 2 IN IP4 127.0.0.1
//s=-
//t=0 0
//a=group:BUNDLE audio video data
//a=msid-semantic: WMS 616cfbb1-33a3-4d8c-8275-a199d6005549
//m=audio 9 UDP/TLS/RTP/SAVPF 111 103 104 9 0 8 106 105 13 110 112 113 126
//c=IN IP4 0.0.0.0
//a=rtcp:9 IN IP4 0.0.0.0
//a=ice-ufrag:sXJ3
//a=ice-pwd:yEclOTrLg1gEubBFefOqtmyV
//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
//a=setup:actpass
//a=mid:audio
//a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
//a=sendrecv
//a=rtcp-mux
//a=rtpmap:111 opus/48000/2
//a=rtcp-fb:111 transport-cc
//a=fmtp:111 minptime=10;useinbandfec=1
//a=rtpmap:103 ISAC/16000
//a=rtpmap:104 ISAC/32000
//a=rtpmap:9 G722/8000
//a=rtpmap:0 PCMU/8000
//a=rtpmap:8 PCMA/8000
//a=rtpmap:106 CN/32000
//a=rtpmap:105 CN/16000
//a=rtpmap:13 CN/8000
//a=rtpmap:110 telephone-event/48000
//a=rtpmap:112 telephone-event/32000
//a=rtpmap:113 telephone-event/16000
//a=rtpmap:126 telephone-event/8000
//a=ssrc:120276603 cname:iSkJ2vn5cYYubTve
//a=ssrc:120276603 msid:616cfbb1-33a3-4d8c-8275-a199d6005549 1da3d329-7399-4fe9-b20f-69606bebd363
//a=ssrc:120276603 mslabel:616cfbb1-33a3-4d8c-8275-a199d6005549
//a=ssrc:120276603 label:1da3d329-7399-4fe9-b20f-69606bebd363
//m=video 9 UDP/TLS/RTP/SAVPF 96 98 100 102 127 97 99 101 125
//c=IN IP4 0.0.0.0
//a=rtcp:9 IN IP4 0.0.0.0
//a=ice-ufrag:sXJ3
//a=ice-pwd:yEclOTrLg1gEubBFefOqtmyV
//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
//a=setup:actpass
//a=mid:video
//a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
//a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
//a=extmap:4 urn:3gpp:video-orientation
//a=extmap:5 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
//a=extmap:6 http://www.webrtc.org/experiments/rtp-hdrext/playout-delay
//a=sendrecv
//a=rtcp-mux
//a=rtcp-rsize
//a=rtpmap:96 VP8/90000
//a=rtcp-fb:96 ccm fir
//a=rtcp-fb:96 nack
//a=rtcp-fb:96 nack pli
//a=rtcp-fb:96 goog-remb
//a=rtcp-fb:96 transport-cc
//a=rtpmap:98 VP9/90000
//a=rtcp-fb:98 ccm fir
//a=rtcp-fb:98 nack
//a=rtcp-fb:98 nack pli
//a=rtcp-fb:98 goog-remb
//a=rtcp-fb:98 transport-cc
//a=rtpmap:100 H264/90000
//a=rtcp-fb:100 ccm fir
//a=rtcp-fb:100 nack
//a=rtcp-fb:100 nack pli
//a=rtcp-fb:100 goog-remb
//a=rtcp-fb:100 transport-cc
//a=fmtp:100 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f
//a=rtpmap:102 red/90000
//a=rtpmap:127 ulpfec/90000
//a=rtpmap:97 rtx/90000
//a=fmtp:97 apt=96
//a=rtpmap:99 rtx/90000
//a=fmtp:99 apt=98
//a=rtpmap:101 rtx/90000
//a=fmtp:101 apt=100
//a=rtpmap:125 rtx/90000
//a=fmtp:125 apt=102
//a=ssrc-group:FID 2580761338 611523443
//a=ssrc:2580761338 cname:iSkJ2vn5cYYubTve
//a=ssrc:2580761338 msid:616cfbb1-33a3-4d8c-8275-a199d6005549 bf270496-a23e-47b5-b901-ef23096cd961
//a=ssrc:2580761338 mslabel:616cfbb1-33a3-4d8c-8275-a199d6005549
//a=ssrc:2580761338 label:bf270496-a23e-47b5-b901-ef23096cd961
//a=ssrc:611523443 cname:iSkJ2vn5cYYubTve
//a=ssrc:611523443 msid:616cfbb1-33a3-4d8c-8275-a199d6005549 bf270496-a23e-47b5-b901-ef23096cd961
//a=ssrc:611523443 mslabel:616cfbb1-33a3-4d8c-8275-a199d6005549
//a=ssrc:611523443 label:bf270496-a23e-47b5-b901-ef23096cd961
//a=candidate:1 1 udp %u %s %u typ host
//m=application 9 DTLS/SCTP 5000
//c=IN IP4 0.0.0.0
//a=ice-ufrag:sXJ3
//a=ice-pwd:yEclOTrLg1gEubBFefOqtmyV
//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
//a=setup:actpass
//a=mid:data
//a=sctpmap:5000 webrtc-datachannel 1024
//Session description
// v= (protocol version)
// o= (originator and session identifier)
@ -148,7 +47,7 @@ enum class RtpDirection {
//只发送
sendonly,
//只接收
revonly,
recvonly,
//同时发送接收
sendrecv,
//禁止发送数据
@ -171,10 +70,16 @@ enum class SdpType {
answer
};
TrackType getTrackType(const string &str);
const char* getTrackString(TrackType type);
DtlsRole getDtlsRole(const string &str);
const char* getDtlsRoleString(DtlsRole role);
RtpDirection getRtpDirection(const string &str);
const char* getRtpDirectionString(RtpDirection val);
class SdpItem {
public:
using Ptr = std::shared_ptr<SdpItem>;
string value;
virtual ~SdpItem() = default;
virtual void parse(const string &str) {
value = str;
@ -183,6 +88,9 @@ public:
return value;
}
virtual const char* getKey() = 0;
protected:
mutable string value;
};
template <char KEY>
@ -203,10 +111,10 @@ class SdpTime : public SdpItem{
public:
//5.9. Timing ("t=")
// t=<start-time> <stop-time>
uint64_t start;
uint64_t stop;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
uint64_t start {0};
uint64_t stop {0};
void parse(const string &str) override;
string toString() const override;
const char* getKey() override { return "t";}
};
@ -215,14 +123,14 @@ public:
// 5.2. Origin ("o=")
// o=jdoe 2890844526 2890842807 IN IP4 10.47.16.5
// o=<username> <sess-id> <sess-version> <nettype> <addrtype> <unicast-address>
string username;
string username {"-"};
string session_id;
string session_version;
string nettype;
string addrtype;
string address;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
string nettype {"IN"};
string addrtype {"IP4"};
string address {"0.0.0.0"};
void parse(const string &str) override;
string toString() const override;
const char* getKey() override { return "o";}
};
@ -231,11 +139,11 @@ public:
// 5.7. Connection Data ("c=")
// c=IN IP4 224.2.17.12/127
// c=<nettype> <addrtype> <connection-address>
string nettype;
string addrtype;
string address;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
string nettype {"IN"};
string addrtype {"IP4"};
string address {"0.0.0.0"};
void parse(const string &str) override;
string toString() const override;
const char* getKey() override { return "c";}
};
@ -245,11 +153,11 @@ public:
//b=<bwtype>:<bandwidth>
//AS、CT
string bwtype;
int bandwidth;
string bwtype {"AS"};
uint32_t bandwidth {0};
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
void parse(const string &str) override;
string toString() const override;
const char* getKey() override { return "b";}
};
@ -259,11 +167,11 @@ public:
// m=<media> <port> <proto> <fmt> ...
TrackType type;
uint16_t port;
vector<string> proto;
vector<uint8_t> fmt;
string proto;
vector<uint32_t> fmts;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
void parse(const string &str) override;
string toString() const override;
const char* getKey() override { return "m";}
};
@ -275,7 +183,7 @@ public:
//a=<attribute>:<value>
SdpItem::Ptr detail;
void parse(const string &str) override;
string toString() const override { return SdpItem::toString(); };
string toString() const override;
const char* getKey() override { return "a";}
};
@ -285,50 +193,63 @@ public:
// BUNDLE group is included at the session-level.
//a=group:LS session level attribute MUST be included wth the 'mid'
// identifiers that are part of the same lip sync group.
string type;
vector<string> mid;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
string type {"BUNDLE"};
vector<string> mids;
void parse(const string &str) override ;
string toString() const override ;
const char* getKey() override { return "group";}
};
class SdpAttrMsidSemantic : public SdpItem {
public:
string name{"WMS"};
string mid;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
//https://tools.ietf.org/html/draft-alvestrand-rtcweb-msid-02#section-3
//3. The Msid-Semantic Attribute
//
// In order to fully reproduce the semantics of the SDP and SSRC
// grouping frameworks, a session-level attribute is defined for
// signalling the semantics associated with an msid grouping.
//
// This OPTIONAL attribute gives the message ID and its group semantic.
// a=msid-semantic: examplefoo LS
//
//
// The ABNF of msid-semantic is:
//
// msid-semantic-attr = "msid-semantic:" " " msid token
// token = <as defined in RFC 4566>
//
// The semantic field may hold values from the IANA registries
// "Semantics for the "ssrc-group" SDP Attribute" and "Semantics for the
// "group" SDP Attribute".
//a=msid-semantic: WMS 616cfbb1-33a3-4d8c-8275-a199d6005549
string msid{"WMS"};
string token;
void parse(const string &str) override;
string toString() const override;
const char* getKey() override { return "msid-semantic";}
};
class SdpAttrRtcp : public SdpItem {
public:
// c=IN IP4 224.2.17.12/127
// c=<nettype> <addrtype> <connection-address>
// a=rtcp:9 IN IP4 0.0.0.0
uint16_t port;
string nettype;
string addrtype;
string address;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
string nettype {"IN"};
string addrtype {"IP4"};
string address {"0.0.0.0"};
void parse(const string &str) override;;
string toString() const override;
const char* getKey() override { return "rtcp";}
};
class SdpAttrIceUfrag : public SdpItem {
public:
//a=ice-ufrag:sXJ3
string value;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
const char* getKey() override { return "ice-ufrag";}
};
class SdpAttrIcePwd : public SdpItem {
public:
//a=ice-pwd:yEclOTrLg1gEubBFefOqtmyV
string value;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
const char* getKey() override { return "ice-pwd";}
};
@ -336,27 +257,24 @@ class SdpAttrFingerprint : public SdpItem {
public:
//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
string algorithm;
string value;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
string hash;
void parse(const string &str) override;
string toString() const override;
const char* getKey() override { return "fingerprint";}
};
class SdpAttrSetup : public SdpItem {
public:
//a=setup:actpass
DtlsRole role{DtlsRole::invalid};
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
DtlsRole role{DtlsRole::actpass};
void parse(const string &str) override;
string toString() const override;
const char* getKey() override { return "setup";}
};
class SdpAttrMid : public SdpItem {
public:
//a=mid:audio
string mid;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
const char* getKey() override { return "mid";}
};
@ -364,9 +282,9 @@ class SdpAttrExtmap : public SdpItem {
public:
//a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
int index;
string value;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
string ext;
void parse(const string &str) override;
string toString() const override;
const char* getKey() override { return "extmap";}
};
@ -376,68 +294,85 @@ public:
uint8_t pt;
string codec;
int sample_rate;
int channel;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
int channel {0};
void parse(const string &str) override;
string toString() const override;
const char* getKey() override { return "rtpmap";}
};
class SdpAttrRtcpFb : public SdpItem {
public:
//a=rtcp-fb:111 transport-cc
//a=rtcp-fb:98 nack pli
uint8_t pt;
string value;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
vector<string> arr;
void parse(const string &str) override;
string toString() const override;
const char* getKey() override { return "rtcp-fb";}
};
class SdpAttrFmtp : public SdpItem {
public:
//a=rtcp-fb:111 transport-cc
//fmtp:96 level-asymmetry-allowed=1;packetization-mode=0;profile-level-id=42e01f
uint8_t pt;
map<string, string> values;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
vector<std::pair<string, string> > arr;
void parse(const string &str) override;
string toString() const override;
const char* getKey() override { return "fmtp";}
};
class SdpAttrSSRC : public SdpItem {
public:
//a=ssrc:120276603 cname:iSkJ2vn5cYYubTve
//a=ssrc:<ssrc-id> <attribute>
//a=ssrc:<ssrc-id> <attribute>:<value>
uint32_t ssrc;
string key;
string value;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
string attribute;
string attribute_value;
void parse(const string &str) override;
string toString() const override;
const char* getKey() override { return "ssrc";}
};
class SdpAttrSctpMap : public SdpItem {
public:
//a=ssrc:120276603 cname:iSkJ2vn5cYYubTve
//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;
string name;
int mtu;
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
string subtypes;
int streams;
void parse(const string &str) override;
string toString() const override;
const char* getKey() override { return "sctpmap";}
};
class SdpAttrCandidate : public SdpItem {
public:
//a=candidate:%s 1 udp %u %s %u typ %s
void parse(const string &str) override {SdpItem::parse(str); };
string toString() const override { return SdpItem::toString(); };
//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>
uint32_t foundation;
uint32_t component;
string transport {"udp"};
uint32_t priority;
string address;
uint16_t port;
string type;
vector<std::pair<string, string> > arr;
void parse(const string &str) override;
string toString() const override;
const char* getKey() override { return "candidate";}
};
class RtcMedia {
public:
vector<SdpItem::Ptr> items;
string toString() const;
bool haveAttr(const char *attr) const;
string getAttrValue(const char *attr) const;
RtpDirection getDirection() const;
};
class RtcSdp {
@ -447,41 +382,6 @@ public:
void parse(const string &str);
string toString() const;
#if 0
/////Session description（会话级别描述）////
//v= (protocol version)
int version;
//o= (session origin information )
SdpOrigin origin;
//s= (session name)
string session_name;
//t= (time the session is active)
SdpTime time;
//// 非必须 ////
//i=* (session information)
string information;
//u=* (URI of description)
string url;
//e=* (email address)
string email;
//p=* (phone number)
string phone;
//c=* (connection information -- not required if included in all media)
SdpConnection connection;
//b=* (zero or more bandwidth information lines)
SdpBandwidth bandwidth;
//z=* (time zone adjustments)
//z=<adjustment time> <offset> <adjustment time> <offset> ....
string time_zone;
//k=* (encryption key)
//k=<method>, k=<method>:<encryption key>
string crypt_key;
//r=* (zero or more repeat times)
//r=<repeat interval> <active duration> <offsets from start-time>
string repeat;
#endif
};