/****************************************
* RecVideo
* Obtiene los packetes y los muestra
*****************************************/
int VideoStream::RecVideo()
{
VideoDecoder* videoDecoder = NULL;
VideoCodec::Type type;
timeval before;
timeval lastFPURequest;
DWORD lostCount=0;
DWORD frameTime = (DWORD)-1;
DWORD lastSeq = RTPPacket::MaxExtSeqNum;
bool waitIntra = false;
Log(">RecVideo\n");
//Get now
gettimeofday(&before,NULL);
//Not sent FPU yet
setZeroTime(&lastFPURequest);
//Mientras tengamos que capturar
while(receivingVideo)
{
//Get RTP packet
RTPPacket* packet = rtp.GetPacket();
//Check
if (!packet)
//Next
continue;
//Get extended sequence number and timestamp
DWORD seq = packet->GetExtSeqNum();
DWORD ts = packet->GetTimestamp();
//Get packet data
BYTE* buffer = packet->GetMediaData();
DWORD size = packet->GetMediaLength();
//Get type
type = (VideoCodec::Type)packet->GetCodec();
//Lost packets since last
DWORD lost = 0;
//If not first
if (lastSeq!=RTPPacket::MaxExtSeqNum)
//Calculate losts
lost = seq-lastSeq-1;
//Increase total lost count
lostCount += lost;
//Update last sequence number
lastSeq = seq;
//If lost some packets or still have not got an iframe
if(lostCount || waitIntra)
{
//Check if we got listener and more than 1/2 second have elapsed from last request
if (listener && getDifTime(&lastFPURequest)>minFPUPeriod)
{
//Debug
Debug("-Requesting FPU lost %d\n",lostCount);
//Reset count
lostCount = 0;
//Request it
listener->onRequestFPU();
//Request also over rtp
rtp.RequestFPU();
//Update time
getUpdDifTime(&lastFPURequest);
//Waiting for refresh
waitIntra = true;
}
}
//Check if it is a redundant packet
if (type==VideoCodec::RED)
{
//Get redundant packet
RTPRedundantPacket* red = (RTPRedundantPacket*)packet;
//Get primary codec
type = (VideoCodec::Type)red->GetPrimaryCodec();
//Check it is not ULPFEC redundant packet
if (type==VideoCodec::ULPFEC)
{
//Delete packet
delete(packet);
//Skip
continue;
}
//Update primary redundant payload
buffer = red->GetPrimaryPayloadData();
size = red->GetPrimaryPayloadSize();
}
//Check codecs
if ((videoDecoder==NULL) || (type!=videoDecoder->type))
{
//If we already got one
if (videoDecoder!=NULL)
//Delete it
delete videoDecoder;
//Create video decorder for codec
videoDecoder = VideoCodecFactory::CreateDecoder(type);
//Check
if (videoDecoder==NULL)
{
Error("Error creando nuevo decodificador de video [%d]\n",type);
//Delete packet
delete(packet);
//Next
continue;
}
}
//Check if we have lost the last packet from the previous frame by comparing both timestamps
if (ts>frameTime)
{
Debug("-lost mark packet ts:%u frameTime:%u\n",ts,frameTime);
//Try to decode what is in the buffer
videoDecoder->DecodePacket(NULL,0,1,1);
//Get picture
BYTE *frame = videoDecoder->GetFrame();
DWORD width = videoDecoder->GetWidth();
DWORD height = videoDecoder->GetHeight();
//Check values
if (frame && width && height)
{
//Set frame size
videoOutput->SetVideoSize(width,height);
//Check if muted
if (!muted)
//Send it
videoOutput->NextFrame(frame);
}
}
//Update frame time
frameTime = ts;
//Decode packet
if(!videoDecoder->DecodePacket(buffer,size,lost,packet->GetMark()))
{
//Check if we got listener and more than 1/2 seconds have elapsed from last request
if (listener && getDifTime(&lastFPURequest)>minFPUPeriod)
{
//Debug
Log("-Requesting FPU decoder error\n");
//Reset count
lostCount = 0;
//Request it
listener->onRequestFPU();
//Request also over rtp
rtp.RequestFPU();
//Update time
getUpdDifTime(&lastFPURequest);
//Waiting for refresh
waitIntra = true;
}
}
//Check if it is the last packet of a frame
if(packet->GetMark())
{
if (videoDecoder->IsKeyFrame())
Debug("-Got Intra\n");
//No frame time yet for next frame
frameTime = (DWORD)-1;
//Get picture
BYTE *frame = videoDecoder->GetFrame();
DWORD width = videoDecoder->GetWidth();
DWORD height = videoDecoder->GetHeight();
//Check values
if (frame && width && height)
{
//Set frame size
videoOutput->SetVideoSize(width,height);
//Check if muted
if (!muted)
//Send it
videoOutput->NextFrame(frame);
}
//Check if we got the waiting refresh
if (waitIntra && videoDecoder->IsKeyFrame())
//Do not wait anymore
waitIntra = false;
}
//Delete packet
delete(packet);
}
//Delete encoder
delete videoDecoder;
Log("<RecVideo\n");
}
