3.2.1. Digital TV demux open()¶
Digital TV demux
int open(const char *deviceName, int flags)¶
Name of specific Digital TV demux device.
A bit-wise OR of the following flags:
open in non-blocking mode (blocking mode is the default)
This system call, used with a device name of
allocates a new filter and returns a handle which can be used for
subsequent control of that filter. This call has to be made for each
filter to be used, i.e. every returned file descriptor is a reference to
a single filter.
/dev/dvb/adapter?/dvr? is a logical device to be used
for retrieving Transport Streams for digital video recording. When
reading from this device a transport stream containing the packets from
all PES filters set in the corresponding demux device
/dev/dvb/adapter?/demux?) having the output set to
A recorded Transport Stream is replayed by writing to this device.
The significance of blocking or non-blocking mode is described in the
documentation for functions where there is a difference. It does not
affect the semantics of the
open() call itself. A device opened
in blocking mode can later be put into non-blocking mode (and vice versa)
F_SETFL command of the fcntl system call.
18.104.22.168. Return Value¶
On success 0 is returned.
On error -1 is returned, and the
errno variable is set
"Too many open files", i.e. no more filters available.
The generic error codes are described at the Generic Error Codes chapter.