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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/userspace-api/media/fdl-appendix.rst.
7..
8.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
9
10.. _AUDIO_CHANNEL_SELECT:
11
12====================
13AUDIO_CHANNEL_SELECT
14====================
15
16Name
17----
18
19AUDIO_CHANNEL_SELECT
20
21.. attention:: This ioctl is deprecated
22
23Synopsis
24--------
25
26.. c:function:: int ioctl(int fd, AUDIO_CHANNEL_SELECT, struct *audio_channel_select)
27 :name: AUDIO_CHANNEL_SELECT
28
29
30Arguments
31---------
32
33.. flat-table::
34 :header-rows: 0
35 :stub-columns: 0
36
37
38 -
39
40 - int fd
41
42 - File descriptor returned by a previous call to open().
43
44 -
45
46 - audio_channel_select_t ch
47
48 - Select the output format of the audio (mono left/right, stereo).
49
50
51Description
52-----------
53
54This ioctl is for Digital TV devices only. To control a V4L2 decoder use the
55V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK`` control instead.
56
57This ioctl call asks the Audio Device to select the requested channel if
58possible.
59
60
61Return Value
62------------
63
64On success 0 is returned, on error -1 and the ``errno`` variable is set
65appropriately. The generic error codes are described at the
66:ref:`Generic Error Codes <gen-errors>` chapter.