mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-10-06 20:23:43 +08:00
744 lines
23 KiB
C++
744 lines
23 KiB
C++
/*
|
||
* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
|
||
*
|
||
* This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
|
||
*
|
||
* Use of this source code is governed by MIT license that can be found in the
|
||
* LICENSE file in the root of the source tree. All contributing project authors
|
||
* may be found in the AUTHORS file in the root of the source tree.
|
||
*/
|
||
|
||
#ifndef ZLMEDIAKIT_SDP_H
|
||
#define ZLMEDIAKIT_SDP_H
|
||
|
||
#include <string>
|
||
#include <vector>
|
||
#include "RtpExt.h"
|
||
#include "assert.h"
|
||
#include "Extension/Frame.h"
|
||
#include "Common/Parser.h"
|
||
using namespace std;
|
||
using namespace mediakit;
|
||
|
||
//https://datatracker.ietf.org/doc/rfc4566/?include_text=1
|
||
//https://blog.csdn.net/aggresss/article/details/109850434
|
||
//https://aggresss.blog.csdn.net/article/details/106436703
|
||
//Session description
|
||
// v= (protocol version)
|
||
// o= (originator and session identifier)
|
||
// s= (session name)
|
||
// i=* (session information)
|
||
// u=* (URI of description)
|
||
// e=* (email address)
|
||
// p=* (phone number)
|
||
// c=* (connection information -- not required if included in
|
||
// all media)
|
||
// b=* (zero or more bandwidth information lines)
|
||
// One or more time descriptions ("t=" and "r=" lines; see below)
|
||
// z=* (time zone adjustments)
|
||
// k=* (encryption key)
|
||
// a=* (zero or more session attribute lines)
|
||
// Zero or more media descriptions
|
||
//
|
||
// Time description
|
||
// t= (time the session is active)
|
||
// r=* (zero or more repeat times)
|
||
//
|
||
// Media description, if present
|
||
// m= (media name and transport address)
|
||
// i=* (media title)
|
||
// c=* (connection information -- optional if included at
|
||
// session level)
|
||
// b=* (zero or more bandwidth information lines)
|
||
// k=* (encryption key)
|
||
// a=* (zero or more media attribute lines)
|
||
|
||
enum class RtpDirection {
|
||
invalid = -1,
|
||
//只发送
|
||
sendonly,
|
||
//只接收
|
||
recvonly,
|
||
//同时发送接收
|
||
sendrecv,
|
||
//禁止发送数据
|
||
inactive
|
||
};
|
||
|
||
enum class DtlsRole {
|
||
invalid = -1,
|
||
//客户端
|
||
active,
|
||
//服务端
|
||
passive,
|
||
//既可作做客户端也可以做服务端
|
||
actpass,
|
||
};
|
||
|
||
enum class SdpType {
|
||
invalid = -1,
|
||
offer,
|
||
answer
|
||
};
|
||
|
||
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>;
|
||
virtual ~SdpItem() = default;
|
||
virtual void parse(const string &str) {
|
||
value = str;
|
||
}
|
||
virtual string toString() const {
|
||
return value;
|
||
}
|
||
virtual const char* getKey() const = 0;
|
||
|
||
void reset() {
|
||
value.clear();
|
||
}
|
||
|
||
protected:
|
||
mutable string value;
|
||
};
|
||
|
||
template <char KEY>
|
||
class SdpString : public SdpItem{
|
||
public:
|
||
SdpString() = default;
|
||
SdpString(string val) {value = std::move(val);}
|
||
// *=*
|
||
const char* getKey() const override { static string key(1, KEY); return key.data();}
|
||
};
|
||
|
||
class SdpCommon : public SdpItem {
|
||
public:
|
||
string key;
|
||
SdpCommon(string key) { this->key = std::move(key); }
|
||
SdpCommon(string key, string val) {
|
||
this->key = std::move(key);
|
||
this->value = std::move(val);
|
||
}
|
||
|
||
const char* getKey() const override { return key.data();}
|
||
};
|
||
|
||
class SdpTime : public SdpItem{
|
||
public:
|
||
//5.9. Timing ("t=")
|
||
// t=<start-time> <stop-time>
|
||
uint64_t start {0};
|
||
uint64_t stop {0};
|
||
void parse(const string &str) override;
|
||
string toString() const override;
|
||
const char* getKey() const override { return "t";}
|
||
};
|
||
|
||
class SdpOrigin : public SdpItem{
|
||
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 session_id;
|
||
string session_version;
|
||
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() const override { return "o";}
|
||
bool empty() const {
|
||
return username.empty() || session_id.empty() || session_version.empty()
|
||
|| nettype.empty() || addrtype.empty() || address.empty();
|
||
}
|
||
};
|
||
|
||
class SdpConnection : public SdpItem {
|
||
public:
|
||
// 5.7. Connection Data ("c=")
|
||
// c=IN IP4 224.2.17.12/127
|
||
// c=<nettype> <addrtype> <connection-address>
|
||
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() const override { return "c";}
|
||
bool empty() const {return address.empty();}
|
||
};
|
||
|
||
class SdpBandwidth : public SdpItem {
|
||
public:
|
||
//5.8. Bandwidth ("b=")
|
||
//b=<bwtype>:<bandwidth>
|
||
|
||
//AS、CT
|
||
string bwtype {"AS"};
|
||
uint32_t bandwidth {0};
|
||
|
||
void parse(const string &str) override;
|
||
string toString() const override;
|
||
const char* getKey() const override { return "b";}
|
||
bool empty() const {return bandwidth == 0;}
|
||
};
|
||
|
||
class SdpMedia : public SdpItem {
|
||
public:
|
||
// 5.14. Media Descriptions ("m=")
|
||
// m=<media> <port> <proto> <fmt> ...
|
||
TrackType type;
|
||
uint16_t port;
|
||
//RTP/AVP：应用场景为视频/音频的 RTP 协议。参考 RFC 3551
|
||
//RTP/SAVP：应用场景为视频/音频的 SRTP 协议。参考 RFC 3711
|
||
//RTP/AVPF: 应用场景为视频/音频的 RTP 协议，支持 RTCP-based Feedback。参考 RFC 4585
|
||
//RTP/SAVPF: 应用场景为视频/音频的 SRTP 协议，支持 RTCP-based Feedback。参考 RFC 5124
|
||
string proto;
|
||
vector<uint32_t> fmts;
|
||
|
||
void parse(const string &str) override;
|
||
string toString() const override;
|
||
const char* getKey() const override { return "m";}
|
||
};
|
||
|
||
class SdpAttr : public SdpItem{
|
||
public:
|
||
using Ptr = std::shared_ptr<SdpAttr>;
|
||
//5.13. Attributes ("a=")
|
||
//a=<attribute>
|
||
//a=<attribute>:<value>
|
||
SdpItem::Ptr detail;
|
||
void parse(const string &str) override;
|
||
string toString() const override;
|
||
const char* getKey() const override { return "a";}
|
||
};
|
||
|
||
class SdpAttrGroup : public SdpItem{
|
||
public:
|
||
//a=group:BUNDLE line with all the 'mid' identifiers part of the
|
||
// 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 {"BUNDLE"};
|
||
vector<string> mids;
|
||
void parse(const string &str) override ;
|
||
string toString() const override ;
|
||
const char* getKey() const override { return "group";}
|
||
};
|
||
|
||
class SdpAttrMsidSemantic : public SdpItem {
|
||
public:
|
||
//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() const override { return "msid-semantic";}
|
||
bool empty() const {
|
||
return msid.empty();
|
||
}
|
||
};
|
||
|
||
class SdpAttrRtcp : public SdpItem {
|
||
public:
|
||
// a=rtcp:9 IN IP4 0.0.0.0
|
||
uint16_t port{0};
|
||
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() const override { return "rtcp";}
|
||
bool empty() const {
|
||
return address.empty() || !port;
|
||
}
|
||
};
|
||
|
||
class SdpAttrIceUfrag : public SdpItem {
|
||
public:
|
||
SdpAttrIceUfrag() = default;
|
||
SdpAttrIceUfrag(string str) {value = std::move(str);}
|
||
//a=ice-ufrag:sXJ3
|
||
const char* getKey() const override { return "ice-ufrag";}
|
||
};
|
||
|
||
class SdpAttrIcePwd : public SdpItem {
|
||
public:
|
||
SdpAttrIcePwd() = default;
|
||
SdpAttrIcePwd(string str) {value = std::move(str);}
|
||
//a=ice-pwd:yEclOTrLg1gEubBFefOqtmyV
|
||
const char* getKey() const override { return "ice-pwd";}
|
||
};
|
||
|
||
class SdpAttrIceOption : public SdpItem {
|
||
public:
|
||
//a=ice-options:trickle
|
||
bool trickle{false};
|
||
bool renomination{false};
|
||
void parse(const string &str) override;
|
||
string toString() const override;
|
||
const char* getKey() const override { return "ice-options";}
|
||
};
|
||
|
||
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 hash;
|
||
void parse(const string &str) override;
|
||
string toString() const override;
|
||
const char* getKey() const override { return "fingerprint";}
|
||
bool empty() const { return algorithm.empty() || hash.empty(); }
|
||
};
|
||
|
||
class SdpAttrSetup : public SdpItem {
|
||
public:
|
||
//a=setup:actpass
|
||
SdpAttrSetup() = default;
|
||
SdpAttrSetup(DtlsRole r) { role = r; }
|
||
DtlsRole role{DtlsRole::actpass};
|
||
void parse(const string &str) override;
|
||
string toString() const override;
|
||
const char* getKey() const override { return "setup";}
|
||
};
|
||
|
||
class SdpAttrMid : public SdpItem {
|
||
public:
|
||
SdpAttrMid() = default;
|
||
SdpAttrMid(string val) { value = std::move(val); }
|
||
//a=mid:audio
|
||
const char* getKey() const override { return "mid";}
|
||
};
|
||
|
||
class SdpAttrExtmap : public SdpItem {
|
||
public:
|
||
//https://aggresss.blog.csdn.net/article/details/106436703
|
||
//a=extmap:1[/sendonly] urn:ietf:params:rtp-hdrext:ssrc-audio-level
|
||
uint8_t id;
|
||
RtpDirection direction{RtpDirection::invalid};
|
||
string ext;
|
||
void parse(const string &str) override;
|
||
string toString() const override;
|
||
const char* getKey() const override { return "extmap";}
|
||
};
|
||
|
||
class SdpAttrRtpMap : public SdpItem {
|
||
public:
|
||
//a=rtpmap:111 opus/48000/2
|
||
uint8_t pt;
|
||
string codec;
|
||
uint32_t sample_rate;
|
||
uint32_t channel {0};
|
||
void parse(const string &str) override;
|
||
string toString() const override;
|
||
const char* getKey() const override { return "rtpmap";}
|
||
};
|
||
|
||
class SdpAttrRtcpFb : public SdpItem {
|
||
public:
|
||
//a=rtcp-fb:98 nack pli
|
||
//a=rtcp-fb:120 nack 支持 nack 重传，nack (Negative-Acknowledgment) 。
|
||
//a=rtcp-fb:120 nack pli 支持 nack 关键帧重传，PLI (Picture Loss Indication) 。
|
||
//a=rtcp-fb:120 ccm fir 支持编码层关键帧请求，CCM (Codec Control Message)，FIR (Full Intra Request )，通常与 nack pli 有同样的效果，但是 nack pli 是用于重传时的关键帧请求。
|
||
//a=rtcp-fb:120 goog-remb 支持 REMB (Receiver Estimated Maximum Bitrate) 。
|
||
//a=rtcp-fb:120 transport-cc 支持 TCC (Transport Congest Control) 。
|
||
uint8_t pt;
|
||
string rtcp_type;
|
||
void parse(const string &str) override;
|
||
string toString() const override;
|
||
const char* getKey() const override { return "rtcp-fb";}
|
||
};
|
||
|
||
class SdpAttrFmtp : public SdpItem {
|
||
public:
|
||
//fmtp:96 level-asymmetry-allowed=1;packetization-mode=0;profile-level-id=42e01f
|
||
uint8_t pt;
|
||
map<string/*key*/, string/*value*/, StrCaseCompare> fmtp;
|
||
void parse(const string &str) override;
|
||
string toString() const override;
|
||
const char* getKey() const override { return "fmtp";}
|
||
};
|
||
|
||
class SdpAttrSSRC : public SdpItem {
|
||
public:
|
||
//a=ssrc:3245185839 cname:Cx4i/VTR51etgjT7
|
||
//a=ssrc:3245185839 msid:cb373bff-0fea-4edb-bc39-e49bb8e8e3b9 0cf7e597-36a2-4480-9796-69bf0955eef5
|
||
//a=ssrc:3245185839 mslabel:cb373bff-0fea-4edb-bc39-e49bb8e8e3b9
|
||
//a=ssrc:3245185839 label:0cf7e597-36a2-4480-9796-69bf0955eef5
|
||
//a=ssrc:<ssrc-id> <attribute>
|
||
//a=ssrc:<ssrc-id> <attribute>:<value>
|
||
//cname 是必须的，msid/mslabel/label 这三个属性都是 WebRTC 自创的，或者说 Google 自创的，可以参考 https://tools.ietf.org/html/draft-ietf-mmusic-msid-17，
|
||
// 理解它们三者的关系需要先了解三个概念：RTP stream / MediaStreamTrack / MediaStream ：
|
||
//一个 a=ssrc 代表一个 RTP stream ；
|
||
//一个 MediaStreamTrack 通常包含一个或多个 RTP stream，例如一个视频 MediaStreamTrack 中通常包含两个 RTP stream，一个用于常规传输，一个用于 nack 重传；
|
||
//一个 MediaStream 通常包含一个或多个 MediaStreamTrack ，例如 simulcast 场景下，一个 MediaStream 通常会包含三个不同编码质量的 MediaStreamTrack ；
|
||
//这种标记方式并不被 Firefox 认可，在 Firefox 生成的 SDP 中一个 a=ssrc 通常只有一行，例如：
|
||
//a=ssrc:3245185839 cname:Cx4i/VTR51etgjT7
|
||
|
||
uint32_t ssrc;
|
||
string attribute;
|
||
string attribute_value;
|
||
void parse(const string &str) override;
|
||
string toString() const override;
|
||
const char* getKey() const override { return "ssrc";}
|
||
};
|
||
|
||
class SdpAttrSSRCGroup : public SdpItem {
|
||
public:
|
||
//a=ssrc-group 定义参考 RFC 5576(https://tools.ietf.org/html/rfc5576) ，用于描述多个 ssrc 之间的关联，常见的有两种：
|
||
//a=ssrc-group:FID 2430709021 3715850271
|
||
// FID (Flow Identification) 最初用在 FEC 的关联中，WebRTC 中通常用于关联一组常规 RTP stream 和 重传 RTP stream 。
|
||
//a=ssrc-group:SIM 360918977 360918978 360918980
|
||
// 在 Chrome 独有的 SDP munging 风格的 simulcast 中使用，将三组编码质量由低到高的 MediaStreamTrack 关联在一起。
|
||
string type{"FID"};
|
||
vector<uint32_t> ssrcs;
|
||
|
||
bool isFID() const { return type == "FID"; }
|
||
bool isSIM() const { return type == "SIM"; }
|
||
void parse(const string &str) override;
|
||
string toString() const override;
|
||
const char* getKey() const override { return "ssrc-group";}
|
||
};
|
||
|
||
class SdpAttrSctpMap : public SdpItem {
|
||
public:
|
||
//https://tools.ietf.org/html/draft-ietf-mmusic-sctp-sdp-05
|
||
//a=sctpmap:5000 webrtc-datachannel 1024
|
||
//a=sctpmap: sctpmap-number media-subtypes [streams]
|
||
uint16_t port;
|
||
string subtypes;
|
||
uint32_t streams;
|
||
void parse(const string &str) override;
|
||
string toString() const override;
|
||
const char* getKey() const override { return "sctpmap";}
|
||
};
|
||
|
||
class SdpAttrCandidate : public SdpItem {
|
||
public:
|
||
using Ptr = std::shared_ptr<SdpAttrCandidate>;
|
||
//https://tools.ietf.org/html/rfc5245
|
||
//15.1. "candidate" Attribute
|
||
//a=candidate:4 1 udp 2 192.168.1.7 58107 typ host
|
||
//a=candidate:<foundation> <component-id> <transport> <priority> <address> <port> typ <cand-type>
|
||
string foundation;
|
||
//传输媒体的类型,1代表RTP;2代表 RTCP。
|
||
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() const override { return "candidate";}
|
||
};
|
||
|
||
class SdpAttrMsid : public SdpItem{
|
||
public:
|
||
const char* getKey() const override { return "msid";}
|
||
};
|
||
|
||
class SdpAttrExtmapAllowMixed : public SdpItem{
|
||
public:
|
||
const char* getKey() const override { return "extmap-allow-mixed";}
|
||
};
|
||
|
||
class SdpAttrSimulcast : public SdpItem{
|
||
public:
|
||
//https://www.meetecho.com/blog/simulcast-janus-ssrc/
|
||
//https://tools.ietf.org/html/draft-ietf-mmusic-sdp-simulcast-14
|
||
const char* getKey() const override { return "simulcast";}
|
||
void parse(const string &str) override;
|
||
string toString() const override;
|
||
bool empty() const { return rids.empty(); }
|
||
string direction;
|
||
vector<string> rids;
|
||
};
|
||
|
||
class SdpAttrRid : public SdpItem{
|
||
public:
|
||
void parse(const string &str) override;
|
||
string toString() const override;
|
||
const char* getKey() const override { return "rid";}
|
||
string direction;
|
||
string rid;
|
||
};
|
||
|
||
class RtcSdpBase {
|
||
public:
|
||
vector<SdpItem::Ptr> items;
|
||
|
||
public:
|
||
virtual ~RtcSdpBase() = default;
|
||
virtual string toString() const;
|
||
|
||
int getVersion() const;
|
||
SdpOrigin getOrigin() const;
|
||
string getSessionName() const;
|
||
string getSessionInfo() const;
|
||
SdpTime getSessionTime() const;
|
||
SdpConnection getConnection() const;
|
||
SdpBandwidth getBandwidth() const;
|
||
|
||
string getUri() const;
|
||
string getEmail() const;
|
||
string getPhone() const;
|
||
string getTimeZone() const;
|
||
string getEncryptKey() const;
|
||
string getRepeatTimes() const;
|
||
RtpDirection getDirection() const;
|
||
|
||
template<typename cls>
|
||
cls getItemClass(char key, const char *attr_key = nullptr) const{
|
||
auto item = dynamic_pointer_cast<cls>(getItem(key, attr_key));
|
||
if (!item) {
|
||
return cls();
|
||
}
|
||
return *item;
|
||
}
|
||
|
||
string getStringItem(char key, const char *attr_key = nullptr) const{
|
||
auto item = getItem(key, attr_key);
|
||
if (!item) {
|
||
return "";
|
||
}
|
||
return item->toString();
|
||
}
|
||
|
||
SdpItem::Ptr getItem(char key, const char *attr_key = nullptr) const;
|
||
|
||
template<typename cls>
|
||
vector<cls> getAllItem(char key_c, const char *attr_key = nullptr) const {
|
||
vector<cls> ret;
|
||
for (auto item : items) {
|
||
string key(1, key_c);
|
||
if (strcasecmp(item->getKey(), key.data()) == 0) {
|
||
if (!attr_key) {
|
||
auto c = dynamic_pointer_cast<cls>(item);
|
||
if (c) {
|
||
ret.emplace_back(*c);
|
||
}
|
||
} else {
|
||
auto attr = dynamic_pointer_cast<SdpAttr>(item);
|
||
if (attr && !strcasecmp(attr->detail->getKey(), attr_key)) {
|
||
auto c = dynamic_pointer_cast<cls>(attr->detail);
|
||
if (c) {
|
||
ret.emplace_back(*c);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
return ret;
|
||
}
|
||
};
|
||
|
||
class RtcSessionSdp : public RtcSdpBase{
|
||
public:
|
||
using Ptr = std::shared_ptr<RtcSessionSdp>;
|
||
|
||
vector<RtcSdpBase> medias;
|
||
void parse(const string &str);
|
||
string toString() const override;
|
||
};
|
||
|
||
//////////////////////////////////////////////////////////////////
|
||
|
||
//ssrc相关信息
|
||
class RtcSSRC{
|
||
public:
|
||
uint32_t ssrc {0};
|
||
string cname;
|
||
string msid;
|
||
string mslabel;
|
||
string label;
|
||
|
||
bool empty() const {return ssrc == 0 && cname.empty();}
|
||
};
|
||
|
||
//rtc传输编码方案
|
||
class RtcCodecPlan{
|
||
public:
|
||
using Ptr = shared_ptr<RtcCodecPlan>;
|
||
uint8_t pt;
|
||
string codec;
|
||
uint32_t sample_rate;
|
||
//音频时有效
|
||
uint32_t channel = 0;
|
||
//rtcp反馈
|
||
set<string> rtcp_fb;
|
||
map<string/*key*/, string/*value*/, StrCaseCompare> fmtp;
|
||
|
||
string getFmtp(const char *key) const;
|
||
};
|
||
|
||
//rtc 媒体描述
|
||
class RtcMedia{
|
||
public:
|
||
TrackType type{TrackType::TrackInvalid};
|
||
string mid;
|
||
uint16_t port{0};
|
||
SdpConnection addr;
|
||
string proto;
|
||
RtpDirection direction{RtpDirection::invalid};
|
||
vector<RtcCodecPlan> plan;
|
||
|
||
//////// rtp ////////
|
||
vector<RtcSSRC> rtp_rtx_ssrc;
|
||
|
||
//////// simulcast ////////
|
||
vector<RtcSSRC> rtp_ssrc_sim;
|
||
vector<string> rtp_rids;
|
||
|
||
//////// rtcp ////////
|
||
bool rtcp_mux{false};
|
||
bool rtcp_rsize{false};
|
||
SdpAttrRtcp rtcp_addr;
|
||
|
||
//////// ice ////////
|
||
bool ice_trickle{false};
|
||
bool ice_lite{false};
|
||
bool ice_renomination{false};
|
||
string ice_ufrag;
|
||
string ice_pwd;
|
||
std::vector<SdpAttrCandidate> candidate;
|
||
|
||
//////// dtls ////////
|
||
DtlsRole role{DtlsRole::invalid};
|
||
SdpAttrFingerprint fingerprint;
|
||
|
||
//////// extmap ////////
|
||
map<uint8_t /*id*/, SdpAttrExtmap> extmap;
|
||
|
||
//////// sctp ////////////
|
||
SdpAttrSctpMap sctpmap;
|
||
uint32_t sctp_port{0};
|
||
|
||
void checkValid() const;
|
||
const RtcCodecPlan *getPlan(uint8_t pt) const;
|
||
const RtcCodecPlan *getPlan(const char *codec) const;
|
||
const RtcCodecPlan *getRelatedRtxPlan(uint8_t pt) const;
|
||
};
|
||
|
||
class RtcSession{
|
||
public:
|
||
using Ptr = std::shared_ptr<RtcSession>;
|
||
|
||
uint32_t version;
|
||
SdpOrigin origin;
|
||
string session_name;
|
||
string session_info;
|
||
SdpTime time;
|
||
SdpConnection connection;
|
||
SdpBandwidth bandwidth;
|
||
SdpAttrMsidSemantic msid_semantic;
|
||
vector<RtcMedia> media;
|
||
SdpAttrGroup group;
|
||
|
||
void loadFrom(const string &sdp, bool check = true);
|
||
void checkValid() const;
|
||
string toString() const;
|
||
string toRtspSdp() const;
|
||
const RtcMedia *getMedia(TrackType type) const;
|
||
bool supportRtcpFb(const string &name, TrackType type = TrackType::TrackVideo) const;
|
||
|
||
private:
|
||
RtcSessionSdp::Ptr toRtcSessionSdp() const;
|
||
};
|
||
|
||
class RtcConfigure {
|
||
public:
|
||
using Ptr = std::shared_ptr<RtcConfigure>;
|
||
class RtcTrackConfigure {
|
||
public:
|
||
bool enable;
|
||
bool rtcp_mux;
|
||
bool rtcp_rsize;
|
||
bool group_bundle;
|
||
bool support_rtx;
|
||
bool support_red;
|
||
bool support_ulpfec;
|
||
bool ice_lite;
|
||
bool ice_trickle;
|
||
bool ice_renomination;
|
||
string ice_ufrag;
|
||
string ice_pwd;
|
||
|
||
RtpDirection direction{RtpDirection::invalid};
|
||
SdpAttrFingerprint fingerprint;
|
||
|
||
set<string> rtcp_fb;
|
||
set<RtpExtType> extmap;
|
||
vector<CodecId> preferred_codec;
|
||
vector<SdpAttrCandidate> candidate;
|
||
|
||
void setDefaultSetting(TrackType type);
|
||
void enableTWCC(bool enable = true);
|
||
void enableREMB(bool enable = true);
|
||
};
|
||
|
||
RtcTrackConfigure video;
|
||
RtcTrackConfigure audio;
|
||
RtcTrackConfigure application;
|
||
|
||
void setDefaultSetting(string ice_ufrag,
|
||
string ice_pwd,
|
||
RtpDirection direction,
|
||
const SdpAttrFingerprint &fingerprint);
|
||
void addCandidate(const SdpAttrCandidate &candidate, TrackType type = TrackInvalid);
|
||
|
||
shared_ptr<RtcSession> createAnswer(const RtcSession &offer);
|
||
|
||
void setPlayRtspInfo(const string &sdp);
|
||
|
||
void enableTWCC(bool enable = true, TrackType type = TrackInvalid);
|
||
void enableREMB(bool enable = true, TrackType type = TrackInvalid);
|
||
|
||
private:
|
||
void matchMedia(shared_ptr<RtcSession> &ret, TrackType type, const vector<RtcMedia> &medias, const RtcTrackConfigure &configure);
|
||
bool onCheckCodecProfile(const RtcCodecPlan &plan, CodecId codec);
|
||
void onSelectPlan(RtcCodecPlan &plan, CodecId codec);
|
||
|
||
private:
|
||
RtcCodecPlan::Ptr _rtsp_video_plan;
|
||
RtcCodecPlan::Ptr _rtsp_audio_plan;
|
||
};
|
||
|
||
class SdpConst {
|
||
public:
|
||
static string const kTWCCRtcpFb;
|
||
static string const kRembRtcpFb;
|
||
|
||
private:
|
||
SdpConst() = delete;
|
||
~SdpConst() = delete;
|
||
};
|
||
|
||
|
||
#endif //ZLMEDIAKIT_SDP_H
|