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/*
* ts2pkt.cpp: A program for the Video Disk Recorder
*
* See the README file for copyright information and how to reach the author.
*
*/
#include <stdlib.h>
#include <string.h>
extern "C"
{
#include "debug.h"
}
#include "ts2pkt.h"
cMarkAdTS2Pkt::cMarkAdTS2Pkt(const char *QueueName, int QueueSize)
{
queue=new cMarkAdPaketQueue(QueueName,QueueSize);
Reset();
}
cMarkAdTS2Pkt::~cMarkAdTS2Pkt()
{
if (queue) delete queue;
}
void cMarkAdTS2Pkt::Clear()
{
Reset();
}
bool cMarkAdTS2Pkt::Reset(int ErrIndex)
{
sync=false;
switch (ErrIndex)
{
case MA_ERR_TSSIZE:
dsyslog("inbuf not 188 bytes");
break;
case MA_ERR_NOSYNC:
dsyslog("found no sync");
break;
case MA_ERR_SEQ:
dsyslog("sequence error");
break;
case MA_ERR_AFC:
dsyslog("wrong AFC value");
break;
case MA_ERR_TOBIG:
dsyslog("buflen > 188 bytes");
break;
case MA_ERR_NEG:
dsyslog("buflen negative");
break;
}
counter=-1;
if (queue) queue->Clear();
return false;
}
bool cMarkAdTS2Pkt::InjectVideoPES(uchar *PESData, int PESSize)
{
if ((!PESData) || (!PESSize)) return false;
struct PESHDR *peshdr=(struct PESHDR *) PESData;
// first check some simple things
if ((peshdr->Sync1!=0) && (peshdr->Sync2!=0) && (peshdr->Sync3!=1)) return false;
if ((peshdr->StreamID & 0xF0)!=0xE0) return false;
int Length=(peshdr->LenH<<8)+peshdr->LenL;
if (Length) Length+=sizeof(PESHDR);
if (Length!=PESSize) return false;
struct PESHDROPT *peshdropt=(struct PESHDROPT *) &PESData[sizeof(struct PESHDR)];
uchar *buf;
int buflen;
if (peshdropt->MarkerBits==0x2)
{
// we have an optional PES header
int bpos=sizeof(struct PESHDR)+sizeof(struct PESHDROPT)+
peshdropt->Length;
buf=&PESData[bpos];
buflen=PESSize-bpos;
}
else
{
int bpos=sizeof(struct PESHDR);
buf=&PESData[bpos];
buflen=PESSize-bpos;
}
queue->Inject(buf,buflen);
return true;
}
bool cMarkAdTS2Pkt::Process(MarkAdPid Pid, uchar *TSData, int TSSize, MarkAdPacket *Pkt)
{
if ((!Pkt) || (!queue)) return false;
bool ret=true;
if (TSData)
{
if (TSSize!=TS_SIZE)
{
return Reset(MA_ERR_TSSIZE); // we need a full packet
}
// check TS packet sync
if (TSData[0]!=0x47)
{
return Reset(MA_ERR_NOSYNC); // no sync
}
struct TSHDR *tshdr = (struct TSHDR *) TSData;
int pid = (tshdr->PidH << 8) | tshdr->PidL;
if (Pid.Num!=pid)
{
return true; // not for us, but this is ok
}
if ((counter!=-1) && (((counter+1) & 0xF)!=tshdr->Counter))
{
if (counter==(int) tshdr->Counter)
{
return true; // duplicate paket -> just ignore
}
// sequence error
ret=Reset(MA_ERR_SEQ);
if (!tshdr->PayloadStart) return ret;
}
counter=tshdr->Counter;
if (tshdr->PayloadStart)
{
sync=true;
}
if (!sync)
{
return false; // not synced
}
if ((tshdr->AFC<=0) || (tshdr->AFC>3))
{
return Reset(MA_ERR_AFC);
}
// we just ignore the infos in the adaption field (e.g. OPCR/PCR)
if ((tshdr->AFC!=1) && (tshdr->AFC!=3))
{
return true;
}
int buflen=TS_SIZE+1;
uchar *buf=NULL;
if (tshdr->AFC==1)
{
// payload only
buflen=TS_SIZE-sizeof(struct TSHDR);
buf=&TSData[sizeof(struct TSHDR)];
}
if (tshdr->AFC==3)
{
// adaption field + payload
struct TSADAPT *tsadapt = (struct TSADAPT *) &TSData[4];
int alen=tsadapt->Len+1;
buflen=TS_SIZE-(sizeof(struct TSHDR)+alen);
buf=&TSData[sizeof(struct TSHDR)+alen];
}
if (buflen>TS_SIZE)
{
// size to large
return Reset(MA_ERR_TOBIG);
}
if (buflen<0)
{
// error in size
return Reset(MA_ERR_NEG);
}
if (buflen==0)
{
// no data?
return false;
}
if (tshdr->PayloadStart)
{
if ((buf[0]!=0) && (buf[1]!=0))
{
sync=false;
if (buflen<7) return false;
// add a pseudo padding stream
buf[0]=0;
buf[1]=0;
buf[2]=1;
buf[3]=0xbe;
buf[4]=buflen-6;
buf[5]=0;
}
}
queue->Put(buf,buflen);
}
if (!ret) return ret;
if (Pid.Type==MARKAD_PIDTYPE_VIDEO_H264)
{
Pkt->Data=queue->GetPacket(&Pkt->Length,MA_PACKET_H264);
}
else
{
Pkt->Data=queue->GetPacket(&Pkt->Length,MA_PACKET_PKT);
}
return ret;
}
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