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Linux kernel mirror (for testing)
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linux
1.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
2.. c:namespace:: DTV.audio
3
4.. _AUDIO_CHANNEL_SELECT:
5
6====================
7AUDIO_CHANNEL_SELECT
8====================
9
10Name
11----
12
13AUDIO_CHANNEL_SELECT
14
15.. attention:: This ioctl is deprecated
16
17Synopsis
18--------
19
20.. c:macro:: AUDIO_CHANNEL_SELECT
21
22``int ioctl(int fd, AUDIO_CHANNEL_SELECT, struct audio_channel_select *select)``
23
24Arguments
25---------
26
27.. flat-table::
28 :header-rows: 0
29 :stub-columns: 0
30
31 -
32
33 - int fd
34
35 - File descriptor returned by a previous call to open().
36
37 -
38
39 - audio_channel_select_t ch
40
41 - Select the output format of the audio (mono left/right, stereo).
42
43Description
44-----------
45
46This ioctl is for Digital TV devices only. To control a V4L2 decoder use the
47V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK`` control instead.
48
49This ioctl call asks the Audio Device to select the requested channel if
50possible.
51
52Return Value
53------------
54
55On success 0 is returned, on error -1 and the ``errno`` variable is set
56appropriately. The generic error codes are described at the
57:ref:`Generic Error Codes <gen-errors>` chapter.