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- .. -*- 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.
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