[linux-dvb] Re: Help on use of DMX_OUT_TAP

[Johannes Stezenbach <js@convergence.de>]

jng_junk@greenmail.demon.co.uk wrote:
> 
>   int fd = open("/dev/dvb/adapter0/demux0", O_RDWR);
>   if (fd == 0) return EIO;

0 is a valid value for fd.

>   struct dmx_pes_filter_params pesFilterParams;
>   pesFilterParams.pid      = (uint16_t)pid;
>   pesFilterParams.input    = DMX_IN_FRONTEND;
>   pesFilterParams.output   = DMX_OUT_TAP;
>   pesFilterParams.pes_type = DMX_PES_OTHER;
>   pesFilterParams.flags    = DMX_IMMEDIATE_START;
> 
>   int status;
>   if ((status = ioctl(fd, DMX_SET_PES_FILTER, &pesFilterParams)) < 0) {
>     close(fd);
>     perror("Error:");
>     return EIO;
>   }
> 
> I call the code above once for each separate file/pid. Then I read from
> each 'fd'. But I don't get the data stream I was expecting. I was
> expecting to be deluged with data, but instead I seem to receive data at a
> slow rate. Occasionally, read() even returns with an error corresponding
> to "buffer overflow", which also seems strange.

"buffer overflow" means you didn't read the data fast enough.
Otherwise your approach should work.

Johannes


-- 
Info:
To unsubscribe send a mail to ecartis@linuxtv.org with "unsubscribe linux-dvb" as subject.