.. -*- coding: utf-8; mode: rst -*- .. _dmx_fopen: ================ DVB demux open() ================ Name ---- DVB demux open() Synopsis -------- .. c:function:: int open(const char *deviceName, int flags) :name: dvb-dmx-open Arguments --------- ``name`` Name of specific DVB demux device. ``flags`` A bit-wise OR of the following flags: .. flat-table:: :header-rows: 0 :stub-columns: 0 - - O_RDONLY - read-only access - - O_RDWR - read/write access - - O_NONBLOCK - open in non-blocking mode (blocking mode is the default) Description ----------- This system call, used with a device name of /dev/dvb/adapter0/demux0, 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/adapter0/dvr0 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/adapter0/demux0) having the output set to DMX_OUT_TS_TAP. 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) using the F_SETFL command of the fcntl system call. Return Value ------------ .. flat-table:: :header-rows: 0 :stub-columns: 0 - .. row 1 - ``ENODEV`` - Device driver not loaded/available. - .. row 2 - ``EINVAL`` - Invalid argument. - .. row 3 - ``EMFILE`` - “Too many open files”, i.e. no more filters available. - .. row 4 - ``ENOMEM`` - The driver failed to allocate enough memory. |