/****************************************
* RecText
* Obtiene los packetes y los muestra
*****************************************/
int MediaBridgeSession::RecText()
{
DWORD timeStamp=0;
DWORD lastSeq = RTPPacket::MaxExtSeqNum;
Log(">RecText\n");
//Mientras tengamos que capturar
while(receivingText)
{
//Get packet
RTPPacket *packet = rtpText.GetPacket();
//Check packet
if (!packet)
continue;
//Get data
BYTE* data = packet->GetMediaData();
//And length
DWORD size = packet->GetMediaLength();
//Get extended sequence number
DWORD seq = packet->GetExtSeqNum();
//Lost packets since last one
DWORD lost = 0;
//If not first
if (lastSeq!=RTPPacket::MaxExtSeqNum)
//Calculate losts
lost = seq-lastSeq-1;
//Update last sequence number
lastSeq = seq;
//Get type
TextCodec::Type type = (TextCodec::Type)packet->GetCodec();
//Check the type of data
if (type==TextCodec::T140RED)
{
//Get redundant packet
RTPRedundantPacket* red = (RTPRedundantPacket*)packet;
//Check lost packets count
if (lost == 0)
{
//Create text frame
TextFrame frame(timeStamp ,red->GetPrimaryPayloadData(),red->GetPrimaryPayloadSize());
//Create new timestamp associated to latest media time
RTMPMetaData meta(getDifTime(&first)/1000);
//Add text name
meta.AddParam(new AMFString(L"onText"));
//Set data
meta.AddParam(new AMFString(frame.GetWChar()));
//Send data
SendMetaData(&meta);
} else {
//Timestamp of first packet (either receovered or not)
DWORD ts = timeStamp;
//Check if we have any red pacekt
if (red->GetRedundantCount()>0)
//Get the timestamp of first redundant packet
ts = red->GetRedundantTimestamp(0);
//If we have lost too many
if (lost>red->GetRedundantCount())
//Get what we have available only
lost = red->GetRedundantCount();
//For each lonot recoveredt packet send a mark
for (int i=red->GetRedundantCount();i<lost;i++)
{
//Create frame of lost replacement
TextFrame frame(ts,LOSTREPLACEMENT,sizeof(LOSTREPLACEMENT));
//Create new timestamp associated to latest media time
RTMPMetaData meta(getDifTime(&first)/1000);
//Add text name
meta.AddParam(new AMFString(L"onText"));
//Set data
meta.AddParam(new AMFString(frame.GetWChar()));
//Send data
SendMetaData(&meta);
}
//Fore each recovered packet
for (int i=red->GetRedundantCount()-lost;i<red->GetRedundantCount();i++)
{
//Create frame from recovered data
TextFrame frame(red->GetRedundantTimestamp(i),red->GetRedundantPayloadData(i),red->GetRedundantPayloadSize(i));
//Create new timestamp associated to latest media time
RTMPMetaData meta(getDifTime(&first)/1000);
//Add text name
meta.AddParam(new AMFString(L"onText"));
//Set data
meta.AddParam(new AMFString(frame.GetWChar()));
//Send data
SendMetaData(&meta);
}
}
} else {
//Create frame
TextFrame frame(timeStamp,data,size);
//Create new timestamp associated to latest media time
RTMPMetaData meta(getDifTime(&first)/1000);
//Add text name
meta.AddParam(new AMFString(L"onText"));
//Set data
meta.AddParam(new AMFString(frame.GetWChar()));
//Send data
SendMetaData(&meta);
}
}
Log("<RecText\n");
}
bool FECDecoder::AddPacket(RTPPacket* packet)
{
//Check if it is a redundant packet
if (packet->GetCodec()==VideoCodec::RED)
{
//Get the redundant packet
RTPRedundantPacket *red = (RTPRedundantPacket *)packet;
//Check primary redundant type
if (red->GetPrimaryCodec()==VideoCodec::ULPFEC)
{
//Create new FEC data
FECData *fec = new FECData(red->GetPrimaryPayloadData(),red->GetPrimaryPayloadSize());
//Log
Debug("-fec primary red data at %d\n",fec->GetBaseExtSeq());
//Append it
codes.insert(std::pair<DWORD,FECData*>(fec->GetBaseExtSeq(),fec));
//Packet contained no media
return false;
}
//Ensure we don't have it already
if (medias.find(packet->GetExtSeqNum())==medias.end())
//Add media packet
medias[packet->GetExtSeqNum()] = red->CreatePrimaryPacket();
//For each redundant data
for (int i=0;i<red->GetRedundantCount();++i)
{
//Check if it is a FEC pacekt
if (red->GetRedundantCodec(i)==VideoCodec::ULPFEC)
{
//Create new FEC data
FECData *fec = new FECData(red->GetRedundantPayloadData(i),red->GetRedundantPayloadSize(i));
//Log
Debug("-fec red data at %d\n",fec->GetBaseExtSeq());
//Append it
codes.insert(std::pair<DWORD,FECData*>(fec->GetBaseExtSeq(),fec));
}
}
} else if (packet->GetCodec()==VideoCodec::ULPFEC ) {
//Create new FEC data
FECData *fec = new FECData(packet->GetMediaData(),packet->GetMediaLength());
//Log
Debug("-fec data at %d\n",fec->GetBaseExtSeq());
//Append it
codes.insert(std::pair<DWORD,FECData*>(fec->GetBaseExtSeq(),fec));
//Packet contained no media
return false;
} else if (packet->GetCodec()==VideoCodec::FLEXFEC) {
//TODO
return false;
} else {
//Check if we have it already
if (medias.find(packet->GetExtSeqNum())!=medias.end())
//Do nothing
return false;
//Add media packet
medias[packet->GetExtSeqNum()] = packet->Clone();
}
//Get last seq number
DWORD seq = medias.rbegin()->first;
//Remove unused packets
RTPOrderedPackets::iterator it = medias.begin();
//Delete everything until seq-63
while (it->first<seq-63 && it!=medias.end())
{
//Delete rtp packet
delete (it->second);
//Erase it
medias.erase(it++);
}
//Now clean recovery codes
FECOrderedData::iterator it2 = codes.begin();
//Check base sequence
while (it2->first<seq-63 && it2!=codes.end())
{
//Delete object
delete(it2->second);
//Erase and move to next
codes.erase(it2++);
}
//Packet had media
return true;
}
