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[linux-dvb] PES parsing
Hi,
I'm trying to parse PES packets, but I seem to be missed
something (or totally confused).
Here is fragment of my code (stolen from driver's distro
apps/test/test_pes.c):
fd_demux2=open("/dev/ost/demux", O_RDWR|O_NONBLOCK);
pesFilterParams.pid = argc > 1 ? atoi(argv[1]) : 96;
pesFilterParams.input = DMX_IN_FRONTEND;
pesFilterParams.output = DMX_OUT_TAP;
pesFilterParams.pesType = DMX_PES_OTHER;
pesFilterParams.flags = DMX_IMMEDIATE_START;
if (ioctl(fd_demux2, DMX_SET_PES_FILTER, &pesFilterParams) < 0){
perror("audio");
return(1);
}
printf("Audio filter OK\n");
while (1) {
len=read(fd_demux2, buf, 4096);
if (len>0) {
write (aout, buf, len);
break;
}
}
close(aout);
After one successfull reading I got some data. But I can not
find out what are the data represented. I thought it might
be a PES packet or packets(?). But if the following chart
is right then every PES packet starts with 0x00 0x00 0x01
tripplet bytes:
http://members.aol.com/mpucoder/DVD/pes-hdr.html
Am I wrong?
I simply want to be able to parse such data and retrieve
payload from them.
I know only about mpegtools library to do it, but there
are many unwanted code for me, so I would like to find
a simpler solution.
Thanx.
/Honza
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