summaryrefslogtreecommitdiff
path: root/Documentation/media/uapi/dvb/video-get-pts.rst
blob: c73f86f1d35b0a9d337fe47d3c0033b7b9350063 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
.. -*- coding: utf-8; mode: rst -*-

.. _VIDEO_GET_PTS:

=============
VIDEO_GET_PTS
=============

Name
----

VIDEO_GET_PTS

.. attention:: This ioctl is deprecated.

Synopsis
--------

.. c:function:: int ioctl(int fd, VIDEO_GET_PTS, __u64 *pts)
    :name: VIDEO_GET_PTS


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 VIDEO_GET_PTS for this command.

    -  .. row 3

       -  __u64 \*pts

       -  Returns the 33-bit timestamp as defined in ITU T-REC-H.222.0 /
	  ISO/IEC 13818-1.

	  The PTS should belong to the currently played frame if possible,
	  but may also be a value close to it like the PTS of the last
	  decoded frame or the last PTS extracted by the PES parser.


Description
-----------

This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders
this ioctl has been replaced by the ``V4L2_CID_MPEG_VIDEO_DEC_PTS``
control.

This ioctl call asks the Video Device to return the current PTS
timestamp.


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.