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mistserver/lib/sdp.cpp
Marco 3e73508a6a Added SDP input
2022-02-21 15:51:09 +01:00

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#include "adts.h"
#include "defines.h"
#include "encode.h"
#include "h264.h"
#include "h265.h"
#include "http_parser.h"
#include "sdp.h"
#include "url.h"
#include "util.h"
#include <sys/socket.h>
//Dynamic types we hardcode:
//96 = AAC
//97 = H264
//98 = VP8
//99 = VP9
//100 = AC3
//101 = ALAW (non-standard properties)
//102 = opus
//103 = PCM (non-standard properties)
//104 = HEVC
//105 = ULAW (non-standard properties)
//106+ = unused
namespace SDP{
static State *snglState = 0;
static void snglStateInitCallback(const uint64_t track, const std::string &initData){
snglState->updateInit(track, initData);
}
Track::Track(){
rtcpSent = 0;
channel = -1;
firstTime = 0;
packCount = 0;
fpsTime = 0;
fpsMeta = 0;
fps = 0;
mySSRC = rand();
portA = portB = 0;
cPortA = cPortB = 0;
}
/// Extracts a particular parameter from the fmtp string. fmtp member must be set before calling.
std::string Track::getParamString(const std::string &param) const{
if (!fmtp.size()){return "";}
size_t pos = fmtp.find(param);
if (pos == std::string::npos){return "";}
pos += param.size() + 1;
size_t ePos = fmtp.find_first_of(" ;", pos);
return fmtp.substr(pos, ePos - pos);
}
/// Extracts a particular parameter from the fmtp string as an integer. fmtp member must be set
/// before calling.
uint64_t Track::getParamInt(const std::string &param) const{
return atoll(getParamString(param).c_str());
}
/// Gets the SDP contents for sending out a particular given DTSC::Track.
/// \param port UDP port we are sending data to. Defaults to 0
std::string mediaDescription(const DTSC::Meta *meta, size_t tid, uint64_t port){
const DTSC::Meta &M = *meta;
std::stringstream mediaDesc;
std::string codec = M.getCodec(tid);
std::string init = M.getInit(tid);
if (codec == "H264"){
MP4::AVCC avccbox;
avccbox.setPayload(init);
mediaDesc << "m=video " << port << " RTP/AVP 97\r\n"
"a=rtpmap:97 H264/90000\r\n"
"a=cliprect:0,0,"
<< M.getHeight(tid) << "," << M.getWidth(tid) << "\r\na=framesize:97 "
<< M.getWidth(tid) << '-' << M.getHeight(tid)
<< "\r\n"
"a=fmtp:97 packetization-mode=1;profile-level-id="
<< std::hex << std::setw(2) << std::setfill('0') << (int)init.data()[1] << std::dec
<< "E0" << std::hex << std::setw(2) << std::setfill('0') << (int)init.data()[3]
<< std::dec << ";sprop-parameter-sets=";
size_t count = avccbox.getSPSCount();
for (size_t i = 0; i < count; ++i){
mediaDesc << (i ? "," : "")
<< Encodings::Base64::encode(std::string(avccbox.getSPS(i), avccbox.getSPSLen(i)));
}
mediaDesc << ",";
count = avccbox.getPPSCount();
for (size_t i = 0; i < count; ++i){
mediaDesc << (i ? "," : "")
<< Encodings::Base64::encode(std::string(avccbox.getPPS(i), avccbox.getPPSLen(i)));
}
mediaDesc << "\r\n"
"a=framerate:"
<< ((double)M.getFpks(tid)) / 1000.0 << "\r\na=control:track" << tid << "\r\n";
}else if (codec == "HEVC"){
h265::initData iData(init);
mediaDesc << "m=video " << port << " RTP/AVP 104\r\n"
"a=rtpmap:104 H265/90000\r\n"
"a=cliprect:0,0,"
<< M.getHeight(tid) << "," << M.getWidth(tid) << "\r\na=framesize:104 "
<< M.getWidth(tid) << '-' << M.getHeight(tid) << "\r\n"
<< "a=fmtp:104 sprop-vps=";
const std::set<std::string> &vps = iData.getVPS();
if (vps.size()){
for (std::set<std::string>::iterator it = vps.begin(); it != vps.end(); it++){
if (it != vps.begin()){mediaDesc << ",";}
mediaDesc << Encodings::Base64::encode(*it);
}
}
mediaDesc << "; sprop-sps=";
const std::set<std::string> &sps = iData.getSPS();
if (sps.size()){
for (std::set<std::string>::iterator it = sps.begin(); it != sps.end(); it++){
if (it != sps.begin()){mediaDesc << ",";}
mediaDesc << Encodings::Base64::encode(*it);
}
}
mediaDesc << "; sprop-pps=";
const std::set<std::string> &pps = iData.getPPS();
if (pps.size()){
for (std::set<std::string>::iterator it = pps.begin(); it != pps.end(); it++){
if (it != pps.begin()){mediaDesc << ",";}
mediaDesc << Encodings::Base64::encode(*it);
}
}
mediaDesc << "\r\na=framerate:" << ((double)M.getFpks(tid)) / 1000.0 << "\r\na=control:track"
<< tid << "\r\n";
}else if (codec == "VP8"){
mediaDesc << "m=video " << port << " RTP/AVP 98\r\n"
"a=rtpmap:98 VP8/90000\r\n"
"a=cliprect:0,0,"
<< M.getHeight(tid) << "," << M.getWidth(tid) << "\r\na=framesize:98 "
<< M.getWidth(tid) << '-' << M.getHeight(tid) << "\r\n"
<< "a=framerate:" << ((double)M.getFpks(tid)) / 1000.0 << "\r\n"
<< "a=control:track" << tid << "\r\n";
}else if (codec == "VP9"){
mediaDesc << "m=video " << port << " RTP/AVP 99\r\n"
"a=rtpmap:99 VP8/90000\r\n"
"a=cliprect:0,0,"
<< M.getHeight(tid) << "," << M.getWidth(tid) << "\r\na=framesize:99 "
<< M.getWidth(tid) << '-' << M.getHeight(tid) << "\r\n"
<< "a=framerate:" << ((double)M.getFpks(tid)) / 1000.0 << "\r\n"
<< "a=control:track" << tid << "\r\n";
}else if (codec == "MPEG2"){
mediaDesc << "m=video " << port << " RTP/AVP 32\r\n"
"a=cliprect:0,0,"
<< M.getHeight(tid) << "," << M.getWidth(tid) << "\r\na=framesize:32 " << M.getWidth(tid)
<< '-' << M.getHeight(tid) << "\r\na=framerate:" << ((double)M.getFpks(tid)) / 1000.0
<< "\r\na=control:track" << tid << "\r\n";
}else if (codec == "AAC"){
mediaDesc << "m=audio " << port << " RTP/AVP 96"
<< "\r\n"
"a=rtpmap:96 mpeg4-generic/"
<< M.getRate(tid) << "/" << M.getChannels(tid)
<< "\r\n"
"a=fmtp:96 streamtype=5; profile-level-id=15; config=";
for (unsigned int i = 0; i < init.size(); i++){
mediaDesc << std::hex << std::setw(2) << std::setfill('0') << (int)init[i] << std::dec;
}
// these values are described in RFC 3640
mediaDesc << "; mode=AAC-hbr; SizeLength=13; IndexLength=3; IndexDeltaLength=3;\r\n"
"a=control:track"
<< tid << "\r\n";
}else if (codec == "MP3" || codec == "MP2"){
mediaDesc << "m=" << M.getType(tid) << " " << port << " RTP/AVP 14"
<< "\r\n"
"a=rtpmap:14 MPA/90000/"
<< M.getChannels(tid) << "\r\n"
<< "a=control:track" << tid << "\r\n";
}else if (codec == "AC3"){
mediaDesc << "m=audio " << port << " RTP/AVP 100"
<< "\r\n"
"a=rtpmap:100 AC3/"
<< M.getRate(tid) << "/" << M.getChannels(tid) << "\r\n"
<< "a=control:track" << tid << "\r\n";
}else if (codec == "ALAW"){
if (M.getChannels(tid) == 1 && M.getRate(tid) == 8000){
mediaDesc << "m=audio " << port << " RTP/AVP 8"
<< "\r\n";
}else{
mediaDesc << "m=audio " << port << " RTP/AVP 101"
<< "\r\n";
mediaDesc << "a=rtpmap:101 PCMA/" << M.getRate(tid) << "/" << M.getChannels(tid) << "\r\n";
}
mediaDesc << "a=control:track" << tid << "\r\n";
}else if (codec == "ULAW"){
if (M.getChannels(tid) == 1 && M.getRate(tid) == 8000){
mediaDesc << "m=audio " << port << " RTP/AVP 0"
<< "\r\n";
}else{
mediaDesc << "m=audio " << port << " RTP/AVP 105"
<< "\r\n";
mediaDesc << "a=rtpmap:105 PCMU/" << M.getRate(tid) << "/" << M.getChannels(tid) << "\r\n";
}
mediaDesc << "a=control:track" << tid << "\r\n";
}else if (codec == "PCM"){
if (M.getSize(tid) == 16 && M.getChannels(tid) == 2 && M.getRate(tid) == 44100){
mediaDesc << "m=audio " << port << " RTP/AVP 10"
<< "\r\n";
}else if (M.getSize(tid) == 16 && M.getChannels(tid) == 1 && M.getRate(tid) == 44100){
mediaDesc << "m=audio " << port << " RTP/AVP 11"
<< "\r\n";
}else{
mediaDesc << "m=audio " << port << " RTP/AVP 103"
<< "\r\n";
mediaDesc << "a=rtpmap:103 L" << M.getSize(tid) << "/" << M.getRate(tid) << "/"
<< M.getChannels(tid) << "\r\n";
}
mediaDesc << "a=control:track" << tid << "\r\n";
}else if (codec == "opus"){
mediaDesc << "m=audio " << port << " RTP/AVP 102"
<< "\r\n"
"a=rtpmap:102 opus/"
<< M.getRate(tid) << "/" << M.getChannels(tid) << "\r\n"
<< "a=control:track" << tid << "\r\n";
}
return mediaDesc.str();
}
/// Generates a transport string suitable for in a SETUP request.
/// By default generates a TCP mode string.
/// Expects parseTransport to be called with the response from the server.
std::string Track::generateTransport(uint32_t trackNo, const std::string &dest, bool TCPmode){
if (TCPmode){
// We simply request interleaved delivery over a trackNo-based identifier.
// No need to set any internal state, parseTransport will handle it all.
std::stringstream tStr;
tStr << "RTP/AVP/TCP;unicast;interleaved=" << (trackNo * 2) << "-" << (trackNo * 2 + 1);
return tStr.str();
}else{
// A little more tricky: we need to find free ports and remember them.
data.SetDestination(dest, 1337);
rtcp.SetDestination(dest, 1337);
portA = portB = 0;
int retries = 0;
while (portB != portA + 1 && retries < 10){
portA = data.bind(0);
portB = rtcp.bind(portA + 1);
}
std::stringstream tStr;
tStr << "RTP/AVP/UDP;unicast;client_port=" << portA << "-" << portB;
return tStr.str();
}
}
/// Prepares data and RTP control UDP sockets for multicast delivery
/// \param dest: IP address to where we want to push RTP packets to
/// \param port: port which will receive DATA. port+1 will receive RTCP
/// \return True if we have bound the correct ports, False if we need to abort
bool Track::prepareSockets(const std::string dest, uint32_t port){
HIGH_MSG("Preparing sockets for pushing towards '%s' port '%" PRIu32 "'", dest.c_str(), port);
int sendbuff = 4 * 1024 * 1024;
setsockopt(data.getSock(), SOL_SOCKET, SO_SNDBUF, &sendbuff, sizeof(sendbuff));
setsockopt(rtcp.getSock(), SOL_SOCKET, SO_SNDBUF, &sendbuff, sizeof(sendbuff));
data.setSocketFamily(AF_UNSPEC);
rtcp.setSocketFamily(AF_UNSPEC);
data.SetDestination(dest, 1337);
rtcp.SetDestination(dest, 1337);
// If no explicit port was set, we will bind to anything that works for us
// We only need to bind the RTCP UDP port, since we are not receiving data
if (!port){
int retries = 0;
while (!portB && retries < 10){
portB = rtcp.bind(0);
}
portA = portB-1;
}else{
portA = port;
portB = rtcp.bind(portA + 1);
}
data.SetDestination(dest, portA);
rtcp.SetDestination(dest, portB);
if(portB != portA + 1 || !portA || !portB){
return false;
}
return true;
}
/// \brief Determines the codec of the current track
bool Track::setPackCodec(const DTSC::Meta *M, size_t tid){
std::string codec = M->getCodec(tid);
if (codec == "H264"){
pack = RTP::Packet(97, 1, 0, mySSRC);
}else if (codec == "HEVC"){
pack = RTP::Packet(104, 1, 0, mySSRC);
}else if (codec == "VP8"){
pack = RTP::Packet(98, 1, 0, mySSRC);
}else if (codec == "VP9"){
pack = RTP::Packet(99, 1, 0, mySSRC);
}else if (codec == "MPEG2"){
pack = RTP::Packet(32, 1, 0, mySSRC);
}else if (codec == "AAC"){
pack = RTP::Packet(96, 1, 0, mySSRC);
}else if (codec == "AC3"){
pack = RTP::Packet(100, 1, 0, mySSRC);
}else if (codec == "MP3" || codec == "MP2"){
pack = RTP::Packet(14, 1, 0, mySSRC);
}else if (codec == "ALAW"){
if (M->getChannels(tid) == 1 && M->getRate(tid) == 8000){
pack = RTP::Packet(8, 1, 0, mySSRC);
}else{
pack = RTP::Packet(101, 1, 0, mySSRC);
}
}else if (codec == "ULAW"){
if (M->getChannels(tid) == 1 && M->getRate(tid) == 8000){
pack = RTP::Packet(0, 1, 0, mySSRC);
}else{
pack = RTP::Packet(105, 1, 0, mySSRC);
}
}else if (codec == "PCM"){
if (M->getSize(tid) == 16 && M->getChannels(tid) == 2 && M->getRate(tid) == 44100){
pack = RTP::Packet(10, 1, 0, mySSRC);
}else if (M->getSize(tid) == 16 && M->getChannels(tid) == 1 && M->getRate(tid) == 44100){
pack = RTP::Packet(11, 1, 0, mySSRC);
}else{
pack = RTP::Packet(103, 1, 0, mySSRC);
}
}else if (codec == "opus"){
pack = RTP::Packet(102, 1, 0, mySSRC);
}else{
ERROR_MSG("Unsupported codec %s for RTSP on track %zu", codec.c_str(), tid);
return false;
}
return true;
}
/// Sets the TCP/UDP connection details from a given transport string.
/// Sets the transportString member to the current transport string on success.
/// \param host The host connecting to us.
/// \source The source identifier.
/// \return True if successful, false otherwise.
bool Track::parseTransport(const std::string &transport, const std::string &host,
const std::string &source, const DTSC::Meta *M, size_t tid){
if (!setPackCodec(M, tid)){return false;}
if (transport.find("TCP") != std::string::npos){
std::string chanE = transport.substr(transport.find("interleaved=") + 12,
(transport.size() - transport.rfind('-') - 1)); // extract channel ID
channel = atol(chanE.c_str());
rtcpSent = 0;
transportString = transport;
}else{
channel = -1;
uint32_t sPortA = 0, sPortB = 0;
cPortA = cPortB = 0;
size_t sPort_loc = transport.rfind("server_port=") + 12;
if (sPort_loc != std::string::npos){
sPortA = atol(transport.substr(sPort_loc, transport.find('-', sPort_loc) - sPort_loc).c_str());
sPortB = atol(transport.substr(transport.find('-', sPort_loc) + 1).c_str());
}
size_t port_loc = transport.rfind("client_port=") + 12;
if (port_loc != std::string::npos){
cPortA = atol(transport.substr(port_loc, transport.find('-', port_loc) - port_loc).c_str());
cPortB = atol(transport.substr(transport.find('-', port_loc) + 1).c_str());
}
INFO_MSG("UDP ports: server %d/%d, client %d/%d", sPortA, sPortB, cPortA, cPortB);
int sendbuff = 4 * 1024 * 1024;
if (!sPortA || !sPortB){
// Server mode - find server ports
data.SetDestination(host, cPortA);
setsockopt(data.getSock(), SOL_SOCKET, SO_SNDBUF, &sendbuff, sizeof(sendbuff));
rtcp.SetDestination(host, cPortB);
setsockopt(rtcp.getSock(), SOL_SOCKET, SO_SNDBUF, &sendbuff, sizeof(sendbuff));
portA = data.bind(0);
portB = rtcp.bind(0);
std::stringstream tStr;
tStr << "RTP/AVP/UDP;unicast;client_port=" << cPortA << '-' << cPortB << ";";
if (source.size()){tStr << "source=" << source << ";";}
tStr << "server_port=" << portA << "-" << portB << ";ssrc=" << std::hex << mySSRC << std::dec;
transportString = tStr.str();
}else{
// Client mode - check ports and/or obey given ports if possible
data.SetDestination(host, sPortA);
setsockopt(data.getSock(), SOL_SOCKET, SO_SNDBUF, &sendbuff, sizeof(sendbuff));
rtcp.SetDestination(host, sPortB);
setsockopt(rtcp.getSock(), SOL_SOCKET, SO_SNDBUF, &sendbuff, sizeof(sendbuff));
if (portA != cPortA){
portA = data.bind(cPortA);
if (portA != cPortA){
FAIL_MSG("Server requested port %d, which we couldn't bind", cPortA);
return false;
}
}
if (portB != cPortB){
portB = data.bind(cPortB);
if (portB != cPortB){
FAIL_MSG("Server requested port %d, which we couldn't bind", cPortB);
return false;
}
}
transportString = transport;
}
INFO_MSG("Transport string: %s", transportString.c_str());
}
return true;
}
/// Tries to bind a RTP/RTCP UDP port pair
/// \param portInfo port/#ports as found in SDP file
/// \param hostInfo host address
bool Track::bindUDPPort(std::string portInfo, std::string hostInfo){
uint32_t portRTP, portRTCP;
if (portInfo == "" || hostInfo == ""){
WARN_MSG("Can not setup transport to address %s:%s", hostInfo.c_str(), portInfo.c_str());
return false;
}
// Extract port numbers from input string
size_t tempPos;
tempPos = portInfo.find('/');
if (tempPos != std::string::npos){
// TODO https://tools.ietf.org/html/rfc4566#section-5.14
// bind more ports if theres a /, which indicates the amount of port pairs
WARN_MSG("Does not support more than one RTP/RTCP port pair");
portInfo = portInfo.substr(0, tempPos);
}
std::istringstream ( portInfo ) >> portRTP;
portRTCP = portRTP + 1;
// During RTSP streams we get the transport info on setup
// in this case the port is set to 0 in the SDP file
if (!portRTP){
return true;
}
// Since default is set to IPV6, force to AF_UNSPEC
data.setSocketFamily(AF_UNSPEC);
rtcp.setSocketFamily(AF_UNSPEC);
// Test UDP ports
int sendbuff = 4 * 1024 * 1024;
data.SetDestination(hostInfo, portRTP);
setsockopt(data.getSock(), SOL_SOCKET, SO_SNDBUF, &sendbuff, sizeof(sendbuff));
rtcp.SetDestination(hostInfo, portRTCP);
setsockopt(rtcp.getSock(), SOL_SOCKET, SO_SNDBUF, &sendbuff, sizeof(sendbuff));
// Bind sockets
portA = data.bind(portRTP, hostInfo);
if (portA != portRTP){
FAIL_MSG("Server requested RTP port %u, which we couldn't bind", portRTP);
return false;
}
portB = rtcp.bind(portRTCP, hostInfo);
if (portB != portRTCP){
FAIL_MSG("Server requested RTCP port %u, which we couldn't bind", portRTCP);
return false;
}
return true;
}
/// Gets the rtpInfo for a given DTSC::Track, source identifier and timestamp (in millis).
std::string Track::rtpInfo(const DTSC::Meta &M, size_t tid, const std::string &source, uint64_t currentTime){
std::stringstream rInfo;
rInfo << "url=" << source << "/track" << tid << ";"; // get the current url, not localhost
rInfo << "seq=" << pack.getSequence() << ";rtptime=" << currentTime * getMultiplier(&M, tid);
return rInfo.str();
}
State::State(){
incomingPacketCallback = 0;
myMeta = 0;
snglState = this;
}
void State::parseSDP(const std::string &sdp){
DONTEVEN_MSG("Parsing %zu-byte SDP", sdp.size());
if (!sdp.size()){
FAIL_MSG("SDP buffer is empty!");
return;
}
std::stringstream ss(sdp);
std::string to;
// (UDP) Host will be set when a c= line is read
std::string host = "127.0.0.1";
size_t tid = INVALID_TRACK_ID;
bool nope = true; // true if we have no valid track to fill
while (std::getline(ss, to, '\n')){
if (!to.empty() && *to.rbegin() == '\r'){to.erase(to.size() - 1, 1);}
if (to.empty()){continue;}
DONTEVEN_MSG("Parsing SDP line: %s", to.c_str());
// Extract host IP from c= line
// c=<nettype> <addrtype> <connection-address>
if (to.substr(0, 2) == "c="){
// Strip c=
std::stringstream words(to.substr(2));
std::string item;
size_t tempPos;
// Strip nettype
getline(words, item, ' ');
// Strip addrtype
getline(words, item, ' ');
// Get connection address
getline(words, item, ' ');
// Strip TTL, which is appended as IP/TTL
tempPos = item.find('/');
if (tempPos != std::string::npos){
item = item.substr(0, tempPos);
}
host = item;
}
// All tracks start with a media line
// m=<media> <port>/<number of ports> <proto> <fmt> ...
if (to.substr(0, 2) == "m="){
nope = true;
tid = myMeta->addTrack();
// Strip m=
std::stringstream words(to.substr(2));
std::string item;
// Get media type
if (getline(words, item, ' ') && (item == "audio" || item == "video")){
myMeta->setType(tid, item);
myMeta->setID(tid, tid);
}else{
WARN_MSG("Media type not supported: %s", item.c_str());
myMeta->removeTrack(tid);
tracks.erase(tid);
continue;
}
// Get port info and bind RTP/RTCP UDP pairs
getline(words, item, ' ');
if (!tracks[tid].bindUDPPort(item, host) ){
FAIL_MSG("Failed to bind ports for given port info: %s", item.c_str());
}
// Get transport protocol
if (!getline(words, item, ' ') || item.substr(0, 7) != "RTP/AVP"){
WARN_MSG("Media transport not supported: %s", item.c_str());
myMeta->removeTrack(tid);
tracks.erase(tid);
continue;
}
// Get media format description
if (getline(words, item, ' ')){
uint64_t avp_type = JSON::Value(item).asInt();
switch (avp_type){
case 0: // PCM Mu-law
INFO_MSG("PCM Mu-law payload type");
nope = false;
myMeta->setCodec(tid, "ULAW");
myMeta->setRate(tid, 8000);
myMeta->setChannels(tid, 1);
break;
case 8: // PCM A-law
INFO_MSG("PCM A-law payload type");
nope = false;
myMeta->setCodec(tid, "ALAW");
myMeta->setRate(tid, 8000);
myMeta->setChannels(tid, 1);
break;
case 10: // PCM Stereo, 44.1kHz
INFO_MSG("Linear PCM stereo 44.1kHz payload type");
nope = false;
myMeta->setCodec(tid, "PCM");
myMeta->setSize(tid, 16);
myMeta->setRate(tid, 44100);
myMeta->setChannels(tid, 2);
break;
case 11: // PCM Mono, 44.1kHz
INFO_MSG("Linear PCM mono 44.1kHz payload type");
nope = false;
myMeta->setCodec(tid, "PCM");
myMeta->setRate(tid, 44100);
myMeta->setSize(tid, 16);
myMeta->setChannels(tid, 1);
break;
case 14: // MPA
INFO_MSG("MPA payload type");
nope = false;
myMeta->setCodec(tid, "MP3");
myMeta->setRate(tid, 0);
myMeta->setSize(tid, 0);
myMeta->setChannels(tid, 0);
break;
case 32: // MPV
INFO_MSG("MPV payload type");
nope = false;
myMeta->setCodec(tid, "MPEG2");
break;
default:
// dynamic type
if (avp_type >= 96 && avp_type <= 127){
HIGH_MSG("Dynamic payload type (%" PRIu64 ") detected", avp_type);
nope = false;
continue;
}else{
FAIL_MSG("Payload type %" PRIu64 " not supported!", avp_type);
myMeta->removeTrack(tid);
tracks.erase(tid);
continue;
}
}
}
tConv[tid].setProperties(*myMeta, tid);
HIGH_MSG("Incoming track %s", myMeta->getTrackIdentifier(tid).c_str());
continue;
}
if (nope){continue;}// ignore lines if we have no valid track
// RTP mapping
if (to.substr(0, 8) == "a=rtpmap"){
std::string mediaType = to.substr(to.find(' ', 8) + 1);
std::string trCodec = mediaType.substr(0, mediaType.find('/'));
// convert to fullcaps
for (unsigned int i = 0; i < trCodec.size(); ++i){
if (trCodec[i] <= 122 && trCodec[i] >= 97){trCodec[i] -= 32;}
}
if (myMeta->getType(tid) == "audio"){
std::string extraInfo = mediaType.substr(mediaType.find('/') + 1);
if (extraInfo.find('/') != std::string::npos){
size_t lastSlash = extraInfo.find('/');
myMeta->setRate(tid, atoll(extraInfo.substr(0, lastSlash).c_str()));
myMeta->setChannels(tid, atoll(extraInfo.substr(lastSlash + 1).c_str()));
}else{
myMeta->setRate(tid, atoll(extraInfo.c_str()));
myMeta->setChannels(tid, 1);
}
}
if (trCodec == "H264"){
myMeta->setCodec(tid, "H264");
myMeta->setRate(tid, 90000);
}
if (trCodec == "H265"){
myMeta->setCodec(tid, "HEVC");
myMeta->setRate(tid, 90000);
}
if (trCodec == "VP8"){
myMeta->setCodec(tid, "VP8");
myMeta->setRate(tid, 90000);
}
if (trCodec == "VP9"){
myMeta->setCodec(tid, "VP9");
myMeta->setRate(tid, 90000);
}
if (trCodec == "OPUS"){
myMeta->setCodec(tid, "opus");
myMeta->setInit(tid, "OpusHead\001\002\170\000\200\273\000\000\000\000\000", 19);
myMeta->setRate(tid, 48000);
}
if (trCodec == "PCMA"){myMeta->setCodec(tid, "ALAW");}
if (trCodec == "PCMU"){myMeta->setCodec(tid, "ULAW");}
if (trCodec == "L8"){
myMeta->setCodec(tid, "PCM");
myMeta->setSize(tid, 8);
}
if (trCodec == "L16"){
myMeta->setCodec(tid, "PCM");
myMeta->setSize(tid, 16);
}
if (trCodec == "L20"){
myMeta->setCodec(tid, "PCM");
myMeta->setSize(tid, 20);
}
if (trCodec == "L24" || trCodec == "PCM"){
myMeta->setCodec(tid, "PCM");
myMeta->setSize(tid, 24);
}
if (trCodec == "MPEG4-GENERIC"){
myMeta->setCodec(tid, "AAC");
myMeta->setSize(tid, 16);
}
if (!myMeta->getCodec(tid).size()){
ERROR_MSG("Unsupported RTP mapping: %s", mediaType.c_str());
}else{
tConv[tid].setProperties(*myMeta, tid);
HIGH_MSG("Incoming track %s", myMeta->getTrackIdentifier(tid).c_str());
}
continue;
}
if (to.substr(0, 10) == "a=control:"){
tracks[tid].control = to.substr(10);
continue;
}
if (to.substr(0, 12) == "a=framerate:"){
if (!myMeta->getRate(tid)){myMeta->setRate(tid, atof(to.c_str() + 12) * 1000);}
continue;
}
if (to.substr(0, 12) == "a=framesize:"){
// Ignored for now.
/// \TODO Maybe implement?
continue;
}
if (to.substr(0, 11) == "a=cliprect:"){
// Ignored for now.
/// \TODO Maybe implement?
continue;
}
if (to.substr(0, 7) == "a=fmtp:"){
tracks[tid].fmtp = to.substr(7);
if (myMeta->getCodec(tid) == "AAC"){
if (tracks[tid].getParamString("mode") != "AAC-hbr"){
// a=fmtp:97
// profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;
// config=120856E500
FAIL_MSG("AAC transport mode not supported: %s", tracks[tid].getParamString("mode").c_str());
nope = true;
myMeta->removeTrack(tid);
tracks.erase(tid);
continue;
}
myMeta->setInit(tid, Encodings::Hex::decode(tracks[tid].getParamString("config")));
// myMeta.tracks[trackNo].rate = aac::AudSpecConf::rate(myMeta.tracks[trackNo].init);
}
if (myMeta->getCodec(tid) == "H264"){
// a=fmtp:96 packetization-mode=1;
// sprop-parameter-sets=Z0LAHtkA2D3m//AUABqxAAADAAEAAAMAMg8WLkg=,aMuDyyA=;
// profile-level-id=42C01E
std::string sprop = tracks[tid].getParamString("sprop-parameter-sets");
size_t comma = sprop.find(',');
tracks[tid].spsData = Encodings::Base64::decode(sprop.substr(0, comma));
tracks[tid].ppsData = Encodings::Base64::decode(sprop.substr(comma + 1));
updateH264Init(tid);
}
if (myMeta->getCodec(tid) == "HEVC"){
tracks[tid].hevcInfo.addUnit(
Encodings::Base64::decode(tracks[tid].getParamString("sprop-vps")));
tracks[tid].hevcInfo.addUnit(
Encodings::Base64::decode(tracks[tid].getParamString("sprop-sps")));
tracks[tid].hevcInfo.addUnit(
Encodings::Base64::decode(tracks[tid].getParamString("sprop-pps")));
updateH265Init(tid);
}
continue;
}
// We ignore bandwidth lines
if (to.substr(0, 2) == "b="){continue;}
// we ignore everything before the first media line.
if (tid == INVALID_TRACK_ID){continue;}
// at this point, the data is definitely for a track
INFO_MSG("Unhandled SDP line for track %zu: %s", tid, to.c_str());
}
std::set<size_t> validTracks = myMeta->getValidTracks();
for (std::set<size_t>::iterator it = validTracks.begin(); it != validTracks.end(); it++){
INFO_MSG("Detected track %s", myMeta->getTrackIdentifier(*it).c_str());
}
}
/// Calculates H265 track metadata from sps and pps data stored in tracks[trackNo]
void State::updateH265Init(uint64_t tid){
SDP::Track &RTrk = tracks[tid];
if (!RTrk.hevcInfo.haveRequired()){
MEDIUM_MSG("Aborted meta fill for hevc track %" PRIu64 ": no info nal unit", tid);
return;
}
myMeta->setInit(tid, RTrk.hevcInfo.generateHVCC());
h265::metaInfo MI = tracks[tid].hevcInfo.getMeta();
RTrk.fpsMeta = MI.fps;
myMeta->setWidth(tid, MI.width);
myMeta->setHeight(tid, MI.height);
myMeta->setFpks(tid, RTrk.fpsMeta * 1000);
tConv[tid].setProperties(*myMeta, tid);
}
/// Calculates H264 track metadata from vps, sps and pps data stored in tracks[trackNo]
void State::updateH264Init(uint64_t tid){
SDP::Track &RTrk = tracks[tid];
h264::sequenceParameterSet sps(RTrk.spsData.data(), RTrk.spsData.size());
h264::SPSMeta hMeta = sps.getCharacteristics();
MP4::AVCC avccBox;
avccBox.setVersion(1);
avccBox.setProfile(RTrk.spsData[1]);
avccBox.setCompatibleProfiles(RTrk.spsData[2]);
avccBox.setLevel(RTrk.spsData[3]);
avccBox.setSPSCount(1);
avccBox.setSPS(RTrk.spsData);
avccBox.setPPSCount(1);
avccBox.setPPS(RTrk.ppsData);
RTrk.fpsMeta = hMeta.fps;
myMeta->setWidth(tid, hMeta.width);
myMeta->setHeight(tid, hMeta.height);
myMeta->setFpks(tid, hMeta.fps * 1000);
myMeta->setInit(tid, avccBox.payload(), avccBox.payloadSize());
tConv[tid].setProperties(*myMeta, tid);
}
size_t State::getTrackNoForChannel(uint8_t chan){
for (std::map<uint64_t, Track>::iterator it = tracks.begin(); it != tracks.end(); ++it){
if (chan == it->second.channel){return it->first;}
}
return INVALID_TRACK_ID;
}
size_t State::parseSetup(HTTP::Parser &H, const std::string &cH, const std::string &src){
static uint32_t trackCounter = 0;
if (H.url == "200"){
++trackCounter;
if (!tracks.count(trackCounter)){return INVALID_TRACK_ID;}
if (!tracks[trackCounter].parseTransport(H.GetHeader("Transport"), cH, src, myMeta, trackCounter)){
return INVALID_TRACK_ID;
}
return trackCounter;
}
HTTP::URL url(H.url);
std::string urlString = url.getBareUrl();
std::string pw = H.GetVar("pass");
bool loop = true;
while (loop){
if (tracks.size()){
for (std::map<uint64_t, Track>::iterator it = tracks.begin(); it != tracks.end(); ++it){
if (!it->second.control.size()){
it->second.control = "/track" + JSON::Value(it->first).asString();
INFO_MSG("Control track: %s", it->second.control.c_str());
}
if ((urlString.size() >= it->second.control.size() &&
urlString.substr(urlString.size() - it->second.control.size()) == it->second.control) ||
(pw.size() >= it->second.control.size() &&
pw.substr(pw.size() - it->second.control.size()) == it->second.control)){
INFO_MSG("Parsing SETUP against track %" PRIu64, it->first);
if (!it->second.parseTransport(H.GetHeader("Transport"), cH, src, myMeta, it->first)){
return INVALID_TRACK_ID;
}
return it->first;
}
}
}
if (H.url.find("/track") != std::string::npos){
uint32_t trackNo = atoi(H.url.c_str() + H.url.find("/track") + 6);
// if (trackNo){
INFO_MSG("Parsing SETUP against track %" PRIu32, trackNo);
if (!tracks[trackNo].parseTransport(H.GetHeader("Transport"), cH, src, myMeta, trackNo)){
return INVALID_TRACK_ID;
}
return trackNo;
//}
}
if (urlString != url.path){
urlString = url.path;
}else{
loop = false;
}
}
return INVALID_TRACK_ID;
}
/// Returns the multiplier to use to get milliseconds from the RTP payload type for the given
/// track
double getMultiplier(const DTSC::Meta *M, size_t tid){
if (M->getType(tid) == "video" || M->getCodec(tid) == "MP2" || M->getCodec(tid) == "MP3"){
return 90.0;
}
if (M->getCodec(tid) == "opus"){
return 48.0;
}
return ((double)M->getRate(tid) / 1000.0);
}
void State::updateInit(const uint64_t tid, const std::string &initData){
myMeta->setInit(tid, initData.data(), initData.size());
}
/// Handles RTP packets generically, for both TCP and UDP-based connections.
/// In case of UDP, expects packets to be pre-sorted.
void State::handleIncomingRTP(const uint64_t track, const RTP::Packet &pkt){
tConv[track].setCallbacks(incomingPacketCallback, snglStateInitCallback);
tConv[track].addRTP(pkt);
}
/// Re-inits internal variables and removes all tracks from meta
void State::reinitSDP(){
tConv.clear();
size_t trackID;
for (std::map<long unsigned int, Track>::iterator it = tracks.begin(); it != tracks.end(); it++) {
trackID = myMeta->getID(it->first);
INFO_MSG("Removing track %zu:%s", it->first, myMeta->getTrackIdentifier(it->first).c_str());
if (trackID == INVALID_TRACK_ID){
WARN_MSG("TrackID was invalid");
}
else{
myMeta->removeTrack(it->first);
}
}
//myMeta->refresh();
tracks.clear();
}
}// namespace SDP
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