47d23e363f
Just like V4L, split the DVB function calls into one file per system call. This is a requirement for the man pages creator on Sphinx to work, and makes the document easier to maintain. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
59 lines
1.1 KiB
ReStructuredText
59 lines
1.1 KiB
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
|
|
|
|
.. _AUDIO_CHANNEL_SELECT:
|
|
|
|
AUDIO_CHANNEL_SELECT
|
|
====================
|
|
|
|
Description
|
|
-----------
|
|
|
|
This ioctl is for DVB devices only. To control a V4L2 decoder use the
|
|
V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK`` control instead.
|
|
|
|
This ioctl call asks the Audio Device to select the requested channel if
|
|
possible.
|
|
|
|
Synopsis
|
|
--------
|
|
|
|
.. c:function:: int ioctl(int fd, int request = AUDIO_CHANNEL_SELECT, audio_channel_select_t)
|
|
|
|
Arguments
|
|
----------
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
|
|
- .. row 1
|
|
|
|
- int fd
|
|
|
|
- File descriptor returned by a previous call to open().
|
|
|
|
- .. row 2
|
|
|
|
- int request
|
|
|
|
- Equals AUDIO_CHANNEL_SELECT for this command.
|
|
|
|
- .. row 3
|
|
|
|
- audio_channel_select_t ch
|
|
|
|
- Select the output format of the audio (mono left/right, stereo).
|
|
|
|
|
|
Return Value
|
|
------------
|
|
|
|
On success 0 is returned, on error -1 and the ``errno`` variable is set
|
|
appropriately. The generic error codes are described at the
|
|
:ref:`Generic Error Codes <gen-errors>` chapter.
|
|
|
|
|