1.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
2.. c:namespace:: DTV.audio
3
4.. _AUDIO_SET_ID:
5
6============
7AUDIO_SET_ID
8============
9
10Name
11----
12
13AUDIO_SET_ID
14
15.. attention:: This ioctl is deprecated
16
17Synopsis
18--------
19
20.. c:macro:: AUDIO_SET_ID
21
22``int ioctl(int fd, AUDIO_SET_ID, int id)``
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       -  int id
40
41       -  audio sub-stream id
42
43Description
44-----------
45
46This ioctl selects which sub-stream is to be decoded if a program or
47system stream is sent to the video device. If no audio stream type is
48set the id has to be in [0xC0,0xDF] for MPEG sound, in [0x80,0x87] for
49AC3 and in [0xA0,0xA7] for LPCM. More specifications may follow for
50other stream types. If the stream type is set the id just specifies the
51substream id of the audio stream and only the first 5 bits are
52recognized.
53
54Return Value
55------------
56
57On success 0 is returned, on error -1 and the ``errno`` variable is set
58appropriately. The generic error codes are described at the
59:ref:`Generic Error Codes <gen-errors>` chapter.
60