/***********************
* GetNextPacket
* Obtiene el siguiente paquete para enviar
************************/
int H263Encoder1996::GetNextPacket(BYTE *out,DWORD &len)
{
//Get info
MediaFrame::RtpPacketizationInfo& info = frame->GetRtpPacketizationInfo();
//Check
if (num>info.size())
//Exit
return Error("No mor rtp packets!!");
//Get packet
MediaFrame::RtpPacketization* rtp = info[num++];
//Make sure it is enought length
if (rtp->GetTotalLength()>len)
{
//Nullify
len = 0;
//Send it
return Error("H263 MB too big!!! [%d,%d]\n",rtp->GetTotalLength(),len);
}
//Copy prefic
memcpy(out,rtp->GetPrefixData(),rtp->GetPrefixLen());
//Copy data
memcpy(out+rtp->GetPrefixLen(),frame->GetData()+rtp->GetPos(),rtp->GetSize());
//Set len
len = rtp->GetPrefixLen()+rtp->GetSize();
//It is last??
return (num<info.size());
}
int RTPMultiplexerSmoother::SmoothFrame(const MediaFrame* frame,DWORD duration)
{
//Check
if (!frame || !frame->HasRtpPacketizationInfo())
//Error
return Error("Frame do not has packetization info");
//Get info
const MediaFrame::RtpPacketizationInfo& info = frame->GetRtpPacketizationInfo();
DWORD codec = 0;
BYTE *frameData = NULL;
DWORD frameSize = 0;
//Depending on the type
switch(frame->GetType())
{
case MediaFrame::Audio:
{
//get audio frame
AudioFrame * audio = (AudioFrame*)frame;
//Get codec
codec = audio->GetCodec();
//Get data
frameData = audio->GetData();
//Get size
frameSize = audio->GetLength();
}
break;
case MediaFrame::Video:
{
//get Video frame
VideoFrame * video = (VideoFrame*)frame;
//Get codec
codec = video->GetCodec();
//Get data
frameData = video->GetData();
//Get size
frameSize = video->GetLength();
}
break;
default:
return Error("No smoother for frame");
}
DWORD frameLength = 0;
//Calculate total length
for (int i=0;i<info.size();i++)
//Get total length
frameLength += info[i]->GetTotalLength();
//Calculate bitrate for frame
DWORD current = 0;
//For each one
for (int i=0;i<info.size();i++)
{
//Get packet
MediaFrame::RtpPacketization* rtp = info[i];
//Create rtp packet
RTPPacketSched *packet = new RTPPacketSched(frame->GetType(),codec);
//Make sure it is enought length
if (rtp->GetPrefixLen()+rtp->GetSize()>packet->GetMaxMediaLength())
//Error
continue;
//Get pointer to media data
BYTE* out = packet->GetMediaData();
//Copy prefic
memcpy(out,rtp->GetPrefixData(),rtp->GetPrefixLen());
//Copy data
memcpy(out+rtp->GetPrefixLen(),frameData+rtp->GetPos(),rtp->GetSize());
//Set length
DWORD len = rtp->GetPrefixLen()+rtp->GetSize();
//Set length
packet->SetMediaLength(len);
switch(packet->GetMedia())
{
case MediaFrame::Video:
//Set timestamp
packet->SetTimestamp(frame->GetTimeStamp()*90);
break;
case MediaFrame::Audio:
//Set timestamp
packet->SetTimestamp(frame->GetTimeStamp()*8);
break;
default:
//Set timestamp
packet->SetTimestamp(frame->GetTimeStamp());
}
//Check
if (i+1==info.size())
//last
packet->SetMark(true);
else
//No last
packet->SetMark(false);
//Calculate partial lenght
current += len;
//Calculate sending time offset from first frame
packet->SetSendingTime(current*duration/frameLength);
//Append it
queue.Add(packet);
}
return 1;
}
