mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-22 19:00:01 +08:00
添加sdp自动化解析机制
This commit is contained in:
xiongziliang
parent
3dac9e1c51
commit
f4746d161c
228
webrtc/Sdp.cpp
228
webrtc/Sdp.cpp
@ -3,3 +3,231 @@
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//
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#include "Sdp.h"
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using onCreateSdpItem = function<SdpItem::Ptr(const string &key, const string &value)>;
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static unordered_map<string, onCreateSdpItem> 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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InfoL << "register sdp item:" << item.getKey();
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sdpItemCreator.emplace(item.getKey(), std::move(func));
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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<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<SdpAttrSctpMap>();
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return true;
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}
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void RtcSdp::parse(const string &str) {
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static auto flag = registerAllItem();
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RtcMedia *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 (key == "m") {
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medias.emplace_back(RtcMedia());
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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 RtcSdp::toString() const {
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return std::string();
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}
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void SdpAttr::parse(const string &str) {
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SdpItem::parse(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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void test_sdp(){
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char str1[] = "v=0\n"
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"o=- 380154348540553537 2 IN IP4 127.0.0.1\n"
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"s=-\n"
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"t=0 0\n"
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"a=group:BUNDLE video\n"
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"a=msid-semantic: WMS\n"
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"m=video 9 RTP/SAVPF 96\n"
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"c=IN IP4 0.0.0.0\n"
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"a=rtcp:9 IN IP4 0.0.0.0\n"
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"a=ice-ufrag:1ZFN\n"
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"a=ice-pwd:70P3H0jPlGz1fiJl5XZfXMZH\n"
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"a=ice-options:trickle\n"
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"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"
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"a=setup:active\n"
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"a=mid:video\n"
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"a=recvonly\n"
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"a=rtcp-mux\n"
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"a=rtpmap:96 H264/90000\n"
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"a=fmtp:96 level-asymmetry-allowed=1;packetization-mode=0;profile-level-id=42e01f";
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char str2[] = "v=0\n"
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"o=- 2584450093346841581 2 IN IP4 127.0.0.1\n"
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"s=-\n"
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"t=0 0\n"
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"a=group:BUNDLE audio video data\n"
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"a=msid-semantic: WMS 616cfbb1-33a3-4d8c-8275-a199d6005549\n"
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"m=audio 9 UDP/TLS/RTP/SAVPF 111 103 104 9 0 8 106 105 13 110 112 113 126\n"
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"c=IN IP4 0.0.0.0\n"
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"a=rtcp:9 IN IP4 0.0.0.0\n"
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"a=ice-ufrag:sXJ3\n"
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"a=ice-pwd:yEclOTrLg1gEubBFefOqtmyV\n"
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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\n"
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"a=setup:actpass\n"
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"a=mid:audio\n"
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"a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level\n"
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"a=sendrecv\n"
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"a=rtcp-mux\n"
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"a=rtpmap:111 opus/48000/2\n"
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"a=rtcp-fb:111 transport-cc\n"
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"a=fmtp:111 minptime=10;useinbandfec=1\n"
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"a=rtpmap:103 ISAC/16000\n"
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"a=rtpmap:104 ISAC/32000\n"
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"a=rtpmap:9 G722/8000\n"
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"a=rtpmap:0 PCMU/8000\n"
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"a=rtpmap:8 PCMA/8000\n"
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"a=rtpmap:106 CN/32000\n"
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"a=rtpmap:105 CN/16000\n"
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"a=rtpmap:13 CN/8000\n"
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"a=rtpmap:110 telephone-event/48000\n"
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"a=rtpmap:112 telephone-event/32000\n"
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"a=rtpmap:113 telephone-event/16000\n"
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"a=rtpmap:126 telephone-event/8000\n"
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"a=ssrc:120276603 cname:iSkJ2vn5cYYubTve\n"
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"a=ssrc:120276603 msid:616cfbb1-33a3-4d8c-8275-a199d6005549 1da3d329-7399-4fe9-b20f-69606bebd363\n"
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"a=ssrc:120276603 mslabel:616cfbb1-33a3-4d8c-8275-a199d6005549\n"
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"a=ssrc:120276603 label:1da3d329-7399-4fe9-b20f-69606bebd363\n"
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"m=video 9 UDP/TLS/RTP/SAVPF 96 98 100 102 127 97 99 101 125\n"
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"c=IN IP4 0.0.0.0\n"
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"a=rtcp:9 IN IP4 0.0.0.0\n"
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"a=ice-ufrag:sXJ3\n"
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"a=ice-pwd:yEclOTrLg1gEubBFefOqtmyV\n"
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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\n"
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"a=setup:actpass\n"
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"a=mid:video\n"
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"a=extmap:2 urn:ietf:params:rtp-hdrext:toffset\n"
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"a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time\n"
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"a=extmap:4 urn:3gpp:video-orientation\n"
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"a=extmap:5 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01\n"
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"a=extmap:6 http://www.webrtc.org/experiments/rtp-hdrext/playout-delay\n"
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"a=sendrecv\n"
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"a=rtcp-mux\n"
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"a=rtcp-rsize\n"
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"a=rtpmap:96 VP8/90000\n"
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"a=rtcp-fb:96 ccm fir\n"
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"a=rtcp-fb:96 nack\n"
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"a=rtcp-fb:96 nack pli\n"
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"a=rtcp-fb:96 goog-remb\n"
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"a=rtcp-fb:96 transport-cc\n"
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"a=rtpmap:98 VP9/90000\n"
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"a=rtcp-fb:98 ccm fir\n"
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"a=rtcp-fb:98 nack\n"
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"a=rtcp-fb:98 nack pli\n"
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"a=rtcp-fb:98 goog-remb\n"
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"a=rtcp-fb:98 transport-cc\n"
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"a=rtpmap:100 H264/90000\n"
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"a=rtcp-fb:100 ccm fir\n"
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"a=rtcp-fb:100 nack\n"
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"a=rtcp-fb:100 nack pli\n"
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"a=rtcp-fb:100 goog-remb\n"
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"a=rtcp-fb:100 transport-cc\n"
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"a=fmtp:100 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f\n"
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"a=rtpmap:102 red/90000\n"
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"a=rtpmap:127 ulpfec/90000\n"
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"a=rtpmap:97 rtx/90000\n"
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"a=fmtp:97 apt=96\n"
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"a=rtpmap:99 rtx/90000\n"
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"a=fmtp:99 apt=98\n"
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"a=rtpmap:101 rtx/90000\n"
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"a=fmtp:101 apt=100\n"
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"a=rtpmap:125 rtx/90000\n"
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"a=fmtp:125 apt=102\n"
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"a=ssrc-group:FID 2580761338 611523443\n"
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"a=ssrc:2580761338 cname:iSkJ2vn5cYYubTve\n"
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"a=ssrc:2580761338 msid:616cfbb1-33a3-4d8c-8275-a199d6005549 bf270496-a23e-47b5-b901-ef23096cd961\n"
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"a=ssrc:2580761338 mslabel:616cfbb1-33a3-4d8c-8275-a199d6005549\n"
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"a=ssrc:2580761338 label:bf270496-a23e-47b5-b901-ef23096cd961\n"
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"a=ssrc:611523443 cname:iSkJ2vn5cYYubTve\n"
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"a=ssrc:611523443 msid:616cfbb1-33a3-4d8c-8275-a199d6005549 bf270496-a23e-47b5-b901-ef23096cd961\n"
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"a=ssrc:611523443 mslabel:616cfbb1-33a3-4d8c-8275-a199d6005549\n"
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"a=ssrc:611523443 label:bf270496-a23e-47b5-b901-ef23096cd961\n"
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"a=candidate:1 1 udp %u %s %u typ host\n"
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"m=application 9 DTLS/SCTP 5000\n"
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"c=IN IP4 0.0.0.0\n"
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"a=ice-ufrag:sXJ3\n"
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"a=ice-pwd:yEclOTrLg1gEubBFefOqtmyV\n"
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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\n"
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"a=setup:actpass\n"
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"a=mid:data\n"
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"a=sctpmap:5000 webrtc-datachannel 1024";
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RtcSdp sdp1;
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sdp1.parse(str1);
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RtcSdp sdp2;
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sdp2.parse(str2);
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InfoL << sdp1.toString();
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InfoL << sdp2.toString();
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}
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215
webrtc/Sdp.h
215
webrtc/Sdp.h
@ -103,6 +103,7 @@ using namespace mediakit;
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//a=ssrc:611523443 msid:616cfbb1-33a3-4d8c-8275-a199d6005549 bf270496-a23e-47b5-b901-ef23096cd961
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//a=ssrc:611523443 mslabel:616cfbb1-33a3-4d8c-8275-a199d6005549
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//a=ssrc:611523443 label:bf270496-a23e-47b5-b901-ef23096cd961
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//a=candidate:1 1 udp %u %s %u typ host
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//m=application 9 DTLS/SCTP 5000
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//c=IN IP4 0.0.0.0
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//a=ice-ufrag:sXJ3
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@ -172,21 +173,40 @@ enum class SdpType {
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class SdpItem {
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public:
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SdpItem() = default;
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using Ptr = std::shared_ptr<SdpItem>;
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string value;
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virtual ~SdpItem() = default;
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virtual void parse(const string &str) = 0;
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virtual string toString() const = 0;
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virtual void parse(const string &str) {
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value = str;
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}
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virtual string toString() const {
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return value;
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}
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virtual const char* getKey() = 0;
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};
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template <char KEY>
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class SdpString : public SdpItem{
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public:
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// *=*
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const char* getKey() override { static string key(1, KEY); return key.data();}
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};
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class SdpCommon : public SdpItem {
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public:
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string key;
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SdpCommon(string key) { this->key = std::move(key); }
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const char* getKey() override { return key.data();}
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};
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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;
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uint64_t stop;
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void parse(const string &str) override;
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string toString() const override;
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void parse(const string &str) override {SdpItem::parse(str); };
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string toString() const override { return SdpItem::toString(); };
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const char* getKey() override { return "t";}
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};
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@ -201,8 +221,8 @@ public:
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string nettype;
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string addrtype;
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string address;
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void parse(const string &str) override;
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string toString() const override;
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void parse(const string &str) override {SdpItem::parse(str); };
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string toString() const override { return SdpItem::toString(); };
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const char* getKey() override { return "o";}
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};
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@ -214,8 +234,8 @@ public:
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string nettype;
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string addrtype;
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string address;
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void parse(const string &str) override;
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string toString() const override;
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void parse(const string &str) override {SdpItem::parse(str); };
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string toString() const override { return SdpItem::toString(); };
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const char* getKey() override { return "c";}
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};
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@ -228,8 +248,8 @@ public:
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string bwtype;
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int bandwidth;
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void parse(const string &str) override;
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string toString() const override;
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void parse(const string &str) override {SdpItem::parse(str); };
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string toString() const override { return SdpItem::toString(); };
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const char* getKey() override { return "b";}
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};
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@ -242,20 +262,20 @@ public:
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vector<string> proto;
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vector<uint8_t> fmt;
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void parse(const string &str) override;
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string toString() const override;
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void parse(const string &str) override {SdpItem::parse(str); };
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string toString() const override { return SdpItem::toString(); };
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const char* getKey() override { return "m";}
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};
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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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string name;
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string value;
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SdpItem::Ptr detail;
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void parse(const string &str) override;
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string toString() const override;
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string toString() const override { return SdpItem::toString(); };
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const char* getKey() override { return "a";}
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};
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@ -267,26 +287,168 @@ public:
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// identifiers that are part of the same lip sync group.
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string type;
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vector<string> mid;
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void parse(const string &str) override;
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string toString() const override;
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void parse(const string &str) override {SdpItem::parse(str); };
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string toString() const override { return SdpItem::toString(); };
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const char* getKey() override { return "group";}
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};
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class SdpAttrMsidSemantic : public SdpItem {
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public:
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string name{"WMS"};
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string mid;
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void parse(const string &str) override {SdpItem::parse(str); };
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string toString() const override { return SdpItem::toString(); };
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const char* getKey() override { return "msid-semantic";}
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};
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class SdpAttrRtcp : public SdpItem {
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public:
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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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uint16_t port;
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string nettype;
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string addrtype;
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string address;
|
||||
void parse(const string &str) override {SdpItem::parse(str); };
|
||||
string toString() const override { return SdpItem::toString(); };
|
||||
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";}
|
||||
};
|
||||
|
||||
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(); };
|
||||
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(); };
|
||||
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";}
|
||||
};
|
||||
|
||||
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(); };
|
||||
const char* getKey() override { return "extmap";}
|
||||
};
|
||||
|
||||
class SdpAttrRtpMap : public SdpItem {
|
||||
public:
|
||||
//a=rtpmap:111 opus/48000/2
|
||||
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(); };
|
||||
const char* getKey() override { return "rtpmap";}
|
||||
};
|
||||
|
||||
class SdpAttrRtcpFb : public SdpItem {
|
||||
public:
|
||||
//a=rtcp-fb:111 transport-cc
|
||||
uint8_t pt;
|
||||
string value;
|
||||
void parse(const string &str) override {SdpItem::parse(str); };
|
||||
string toString() const override { return SdpItem::toString(); };
|
||||
const char* getKey() override { return "rtcp-fb";}
|
||||
};
|
||||
|
||||
class SdpAttrFmtp : public SdpItem {
|
||||
public:
|
||||
//a=rtcp-fb:111 transport-cc
|
||||
uint8_t pt;
|
||||
map<string, string> values;
|
||||
void parse(const string &str) override {SdpItem::parse(str); };
|
||||
string toString() const override { return SdpItem::toString(); };
|
||||
const char* getKey() override { return "fmtp";}
|
||||
};
|
||||
|
||||
class SdpAttrSSRC : public SdpItem {
|
||||
public:
|
||||
//a=ssrc:120276603 cname:iSkJ2vn5cYYubTve
|
||||
uint32_t ssrc;
|
||||
string key;
|
||||
string value;
|
||||
void parse(const string &str) override {SdpItem::parse(str); };
|
||||
string toString() const override { return SdpItem::toString(); };
|
||||
const char* getKey() override { return "ssrc";}
|
||||
};
|
||||
|
||||
class SdpAttrSctpMap : public SdpItem {
|
||||
public:
|
||||
//a=ssrc:120276603 cname:iSkJ2vn5cYYubTve
|
||||
uint16_t port;
|
||||
string name;
|
||||
int mtu;
|
||||
void parse(const string &str) override {SdpItem::parse(str); };
|
||||
string toString() const override { return SdpItem::toString(); };
|
||||
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(); };
|
||||
const char* getKey() override { return "candidate";}
|
||||
};
|
||||
|
||||
|
||||
class RtcMedia {
|
||||
public:
|
||||
//m=<media> <port> <proto> <fmt> ...
|
||||
SdpMedia media;
|
||||
//c=<nettype> <addrtype> <connection-address>
|
||||
SdpConnection connection;
|
||||
//a=<attribute>:<value>
|
||||
vector<SdpAttr> attributes;
|
||||
|
||||
vector<SdpItem::Ptr> items;
|
||||
bool haveAttr(const char *attr) const;
|
||||
string getAttrValue(const char *attr) const;
|
||||
};
|
||||
|
||||
class RtcSdp {
|
||||
public:
|
||||
vector<SdpItem::Ptr> items;
|
||||
vector<RtcMedia> medias;
|
||||
|
||||
void parse(const string &str);
|
||||
string toString() const;
|
||||
|
||||
#if 0
|
||||
/////Session description（会话级别描述）////
|
||||
//v= (protocol version)
|
||||
int version;
|
||||
@ -319,8 +481,7 @@ public:
|
||||
//r=* (zero or more repeat times)
|
||||
//r=<repeat interval> <active duration> <offsets from start-time>
|
||||
string repeat;
|
||||
//a=* (zero or more media attribute lines)
|
||||
vector<SdpAttr> attributes;
|
||||
#endif
|
||||
};
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user