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1.. Permission is granted to copy, distribute and/or modify this
2.. document under the terms of the GNU Free Documentation License,
3.. Version 1.1 or any later version published by the Free Software
4.. Foundation, with no Invariant Sections, no Front-Cover Texts
5.. and no Back-Cover Texts. A copy of the license is included at
6.. Documentation/media/uapi/fdl-appendix.rst.
7..
8.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
9
10.. _VIDEO_SELECT_SOURCE:
11
12===================
13VIDEO_SELECT_SOURCE
14===================
15
16Name
17----
18
19VIDEO_SELECT_SOURCE
20
21.. attention:: This ioctl is deprecated.
22
23Synopsis
24--------
25
26.. c:function:: int ioctl(fd, VIDEO_SELECT_SOURCE, video_stream_source_t source)
27 :name: VIDEO_SELECT_SOURCE
28
29
30Arguments
31---------
32
33.. flat-table::
34 :header-rows: 0
35 :stub-columns: 0
36
37
38 - .. row 1
39
40 - int fd
41
42 - File descriptor returned by a previous call to open().
43
44 - .. row 2
45
46 - int request
47
48 - Equals VIDEO_SELECT_SOURCE for this command.
49
50 - .. row 3
51
52 - video_stream_source_t source
53
54 - Indicates which source shall be used for the Video stream.
55
56
57Description
58-----------
59
60This ioctl is for Digital TV devices only. This ioctl was also supported by the
61V4L2 ivtv driver, but that has been replaced by the ivtv-specific
62``IVTV_IOC_PASSTHROUGH_MODE`` ioctl.
63
64This ioctl call informs the video device which source shall be used for
65the input data. The possible sources are demux or memory. If memory is
66selected, the data is fed to the video device through the write command.
67
68.. c:type:: video_stream_source_t
69
70.. code-block:: c
71
72 typedef enum {
73 VIDEO_SOURCE_DEMUX, /* Select the demux as the main source */
74 VIDEO_SOURCE_MEMORY /* If this source is selected, the stream
75 comes from the user through the write
76 system call */
77 } video_stream_source_t;
78
79Return Value
80------------
81
82On success 0 is returned, on error -1 and the ``errno`` variable is set
83appropriately. The generic error codes are described at the
84:ref:`Generic Error Codes <gen-errors>` chapter.