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/*
* Copyright (c) 2012 Yoann Blein
* Licensed under the simplified BSD license.
* See Documentation/Licenses/BSD-simplified.txt for more information.
*/
#include <Swiften/ScreenSharing/RTPSessionImpl.h>
#include <Swiften/ScreenSharing/RTPException.h>
#include <Swiften/Network/BoostUDPSocket.h>
#include <Swiften/Base/boost_bsignals.h>
#include <Swiften/Network/UDPSocket.h>
#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/classification.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/numeric/conversion/cast.hpp>
#include <boost/bind.hpp>
#include <rtppacket.h>
#include <rtpsourcedata.h>
#include <rtpsessionparams.h>
namespace Swift {
Sender::Sender(boost::shared_ptr<UDPSocket> udpSocket)
: udpSocket(udpSocket) {
}
bool Sender::SendRTP(const void *data, size_t len) {
send(data, len);
return true;
}
bool Sender::SendRTCP(const void* data, size_t len) {
send(data, len);
return true;
}
bool Sender::ComesFromThisSender (const jrtplib::RTPAddress* address) {
return RTPSessionImpl::nativeAddressToJRTPAddress(udpSocket->getLocalAddress()).IsSameAddress(address);
}
void Sender::send(const void* data, size_t len) {
uint8_t* uint8Data = (uint8_t*)data;
udpSocket->send(SafeByteArray(uint8Data, uint8Data + len));
}
RTPSessionImpl::RTPSessionImpl(boost::shared_ptr<UDPSocket> udpSocket, const RTPPayloadType &payloadType)
: udpSocket(udpSocket), payloadType(payloadType), jRTPRemotePeer(nativeAddressToJRTPAddress(udpSocket->getRemoteAddress())), sender(udpSocket)
{
jrtplib::RTPExternalTransmissionParams transparams(&sender, 0);
jrtplib::RTPSessionParams sessparams;
// IMPORTANT: The local timestamp unit MUST be set, otherwise RTCP Sender Report info will be calculated wrong
sessparams.SetOwnTimestampUnit(1.0 / payloadType.getClockrate());
checkError(session.Create(sessparams, &transparams, jrtplib::RTPTransmitter::ExternalProto));
packetInjecter = static_cast<jrtplib::RTPExternalTransmissionInfo*>(session.GetTransmissionInfo())->GetPacketInjector();
udpSocket->onDataRead.connect(boost::bind(&RTPSessionImpl::handleDataRead, this, _1));
udpSocket->listen();
}
RTPSessionImpl::~RTPSessionImpl()
{
}
void RTPSessionImpl::poll()
{
checkError(session.Poll()); // Required if threading disabled
}
void RTPSessionImpl::checkIncomingPackets()
{
// session.BeginDataAccess(); // useless without threading
if (session.GotoFirstSourceWithData() && session.GetCurrentSourceInfo()->GetRTPDataAddress()->IsSameAddress(&jRTPRemotePeer)) {
do {
jrtplib::RTPPacket *pack;
while ((pack = session.GetNextPacket()) != NULL) {
onIncomingPacket(pack->GetPayloadData(), pack->GetPayloadLength(), pack->HasMarker());
session.DeletePacket(pack);
}
} while (session.GotoNextSourceWithData());
}
// session.EndDataAccess(); // useless without threading
}
void RTPSessionImpl::sendPacket(const SafeByteArray& data, int timestampinc, bool marker)
{
checkError(session.SendPacket((void*)(&data[0]), data.size(), payloadType.getID(), marker, timestampinc));
poll();
}
void RTPSessionImpl::injectData(const SafeByteArray& data)
{
packetInjecter->InjectRTPorRTCP((void*)(&data[0]), data.size(), jRTPRemotePeer);
checkIncomingPackets();
poll();
}
void RTPSessionImpl::stop(int maxWaitMs)
{
session.BYEDestroy(jrtplib::RTPTime(0, maxWaitMs * 1000), "", 0);
udpSocket->close();
}
void RTPSessionImpl::checkError(int rtperr) const
{
if (rtperr < 0)
throw RTPException(jrtplib::RTPGetErrorString(rtperr));
}
void RTPSessionImpl::handleDataRead(boost::shared_ptr<SafeByteArray> data)
{
injectData(*data);
}
jrtplib::RTPIPv4Address RTPSessionImpl::nativeAddressToJRTPAddress(const HostAddressPort& hostAddressPort)
{
// Split address
std::vector<std::string> subStrings;
std::string ipAddress = hostAddressPort.getAddress().toString();
boost::algorithm::split(subStrings, ipAddress, boost::is_any_of("."));
// Cast sub strings array to array of byte
uint8_t ipNumbers[4];
for (int i = 0; i < std::min(4, (int)subStrings.size()); ++i)
ipNumbers[i] = boost::numeric_cast<uint8_t>(boost::lexical_cast<int>(subStrings[i]));
return jrtplib::RTPIPv4Address(ipNumbers, boost::numeric_cast<uint16_t>(hostAddressPort.getPort()));
}
}
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Swift