1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
2 .. c:namespace:: DTV.dmx
3
4 .. _DMX_START:
5
6 =========
7 DMX_START
8 =========
9
10 Name
11 ----
12
13 DMX_START
14
15 Synopsis
16 --------
17
18 .. c:macro:: DMX_START
19
20 ``int ioctl(int fd, DMX_START)``
21
22 Arguments
23 ---------
24
25 ``fd``
26 File descriptor returned by :c:func:`open()`.
27
28 Description
29 -----------
30
31 This ioctl call is used to start the actual filtering operation defined
32 via the ioctl calls :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER`.
33
34 Return Value
35 ------------
36
37 On success 0 is returned.
38
39 On error -1 is returned, and the ``errno`` variable is set
40 appropriately.
41
42 .. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
43
44 .. flat-table::
45 :header-rows: 0
46 :stub-columns: 0
47
48 - .. row 1
49
50 - ``EINVAL``
51
52 - Invalid argument, i.e. no filtering parameters provided via the
53 :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER` ioctls.
54
55 - .. row 2
56
57 - ``EBUSY``
58
59 - This error code indicates that there are conflicting requests.
60 There are active filters filtering data from another input source.
61 Make sure that these filters are stopped before starting this
62 filter.
63
64 The generic error codes are described at the
65 :ref:`Generic Error Codes <gen-errors>` chapter.
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