//
// Search packet signature and return packet type
//_______________________________________
uint8_t fileParser::sync(uint8_t *stream)
{
uint32_t val,hnt;
val=0;
hnt=0;
// preload
if((4+_off)>=_size)
{
printf("Dmx IO: End of file met (%"LLU" / %"LLU" seg%lu)\n",_off,_size,_nbFd);
return 0;
}
hnt=(read8i()<<16) + (read8i()<<8) +read8i();
while((hnt!=0x00001))
{
hnt<<=8;
val=read8i();
hnt+=val;
hnt&=0xffffff;
if(_curFd==_nbFd-1)
{
if((4+_off)>=_size) return 0;
}
}
*stream=read8i();
return 1;
}
//
// Search packet signature and return packet type
//_______________________________________
uint8_t mParser::sync(uint8_t *stream)
{
uint32_t val,hnt;
val=0;
hnt=0;
// preload
hnt=(read8i()<<16) + (read8i()<<8) +read8i(); ;
while((hnt!=0x00001))
{
hnt<<=8;
val=read8i();
hnt+=val;
hnt&=0xffffff;
if(_curFd==_nbFd-1)
{
if((4+_off)>=_sizeFd[_curFd]) return 0;
}
}
*stream=read8i();
return 1;
}
//
// Search packet signature and return packet type
//_______________________________________
uint8_t fileParser::sync(uint8_t *stream)
{
uint32_t val,hnt;
val=0;
hnt=0;
// preload
if((4+_off)>=_size)
{
printf("Dmx IO: End of file met (%" PRIu64" / %" PRIu64" seg:%u)\n",_off,_size,(unsigned int)listOfFd.size());
return 0;
}
hnt=(read8i()<<16) + (read8i()<<8) +read8i();
while((hnt!=0x00001))
{
hnt<<=8;
val=read8i();
hnt+=val;
hnt&=0xffffff;
if(_curFd==listOfFd.size()-1)
{
if((4+_off)>=_size) return 0;
}
}
*stream=read8i();
return 1;
}
// a demuxer is also a king of hi-level parser
uint8_t ADM_mpegDemuxer::sync( uint8_t *stream)
{
uint32_t val,hnt;
//uint64_t p,tail;
val=0;
hnt=0;
// preload
hnt=(read8i()<<16) + (read8i()<<8) +read8i();
if(_lastErr)
{
_lastErr=0;
printf("\n io error , aborting sync\n");
return 0;
}
while((hnt!=0x00001))
{
hnt<<=8;
val=read8i();
hnt+=val;
hnt&=0xffffff;
if(_lastErr)
{
_lastErr=0;
// check if we are near the end, if so we abort
// else we continue
uint64_t pos;
pos=getAbsPos();
// if(_size-pos<1024)
{
printf("\n io error , aborting sync\n");
return 0;
}
printf("\n Bumped into something at %llu / %llu but going on\n",pos,_size);
if(!_size) assert(0);
// else we go on...
hnt=(read8i()<<16) + (read8i()<<8) +read8i();
}
}
*stream=read8i();
return 1;
}
uint8_t dmx_demuxerTS::sync( uint8_t *stream,uint64_t *abs,uint64_t *r,uint64_t *pts,uint64_t *dts)
{
uint32_t val,hnt;
retry:
*r=0;
val=0;
hnt=0;
// preload
hnt=(read8i()<<16) + (read8i()<<8) +read8i();
if(_lastErr)
{
_lastErr=0;
printf("\n io error , aborting sync\n");
return 0;
}
while((hnt!=0x00001))
{
hnt<<=8;
val=read8i();
hnt+=val;
hnt&=0xffffff;
if(_lastErr)
{
_lastErr=0;
printf("\n io error , aborting sync\n");
return 0;
}
}
*stream=read8i();
// Case 1 : assume we are still in the same packet
if(_pesBufferIndex>=4)
{
*abs=_pesBufferStart;
*r=_pesBufferIndex-4;
*pts=_pesPTS;
*dts=_pesDTS;
}
else
{ // pick what is needed from oldPesStart etc...
// since the beginning in the previous packet
uint32_t left=4-_pesBufferIndex;
if(left>_oldPesLen)
{ // previous Packet which len is very shoty
// Ignore
_pesBufferIndex=0;
printf("Ignoring too short packet");
goto retry;
}
left=_oldPesLen-left;
#if 0
printf("Next packet : %I64X Len :%lu, using previous packet %I64X len:%u as pos=%lu\n",
_pesBufferStart,_pesBufferLen,_oldPesStart,_oldPesLen,_pesBufferIndex);
#endif
if(left>_oldPesLen)
{
printf("Need %lu bytes from previous packet, which len is %lu\n",left,_oldPesLen);
ADM_assert(0);
}
*abs=_oldPesStart;
*r=left;
*pts=_oldPTS;
*dts=_oldDTS;
}
return 1;
}
// ******************************************************
uint8_t dmx_demuxerMSDVR::sync( uint8_t *stream,uint64_t *abs,uint64_t *r,uint64_t *pts,uint64_t *dts)
{
uint32_t val,hnt;
*r=0;
val=0;
hnt=0;
// preload
hnt=read32i();
if(_lastErr)
{
_lastErr=0;
printf("\n io error , aborting sync 1\n");
return 0;
}
val=hnt&0xff;
while(((hnt&0xffffff00)!=0x100))
{
hnt<<=8;
val=read8i();
hnt+=val;
if(_lastErr)
{
_lastErr=0;
printf("\n io error , aborting sync 2\n");
return 0;
}
}
*stream=val;
// Case 1 : assume we are still in the same packet
if(_pesBufferIndex>=4)
{
*abs=_pesBufferStart;
*r=_pesBufferIndex-4;
*pts=_pesPTS;
*dts=_pesDTS;
}
else
{ // pick what is needed from oldPesStart etc...
// since the beginning in the previous packet
uint32_t left=4-_pesBufferIndex;
left=_oldPesLen-left;
#if 0
printf("Next packet : %I64X Len :%lu, using previous packet %I64X len:%u as pos=%lu\n",
_pesBufferStart,_pesBufferLen,_oldPesStart,_oldPesLen,_pesBufferIndex);
#endif
if(left>_oldPesLen)
{
printf("Need %lu bytes from previous packet, which len is %lu\n",left,_oldPesLen);
ADM_assert(0);
}
*abs=_oldPesStart;
*r=left;
*pts=_oldPTS;
*dts=_oldDTS;
}
return 1;
}
