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Linux kernel mirror (for testing)
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linux
1.. -*- coding: utf-8; mode: rst -*-
2
3.. _VIDEO_FREEZE:
4
5============
6VIDEO_FREEZE
7============
8
9Name
10----
11
12VIDEO_FREEZE
13
14
15Synopsis
16--------
17
18.. cpp:function:: int ioctl(fd, int request = VIDEO_FREEZE)
19
20
21Arguments
22---------
23
24.. flat-table::
25 :header-rows: 0
26 :stub-columns: 0
27
28
29 - .. row 1
30
31 - int fd
32
33 - File descriptor returned by a previous call to open().
34
35 - .. row 2
36
37 - int request
38
39 - Equals VIDEO_FREEZE for this command.
40
41
42Description
43-----------
44
45This ioctl is for DVB devices only. To control a V4L2 decoder use the
46V4L2 :ref:`VIDIOC_DECODER_CMD` instead.
47
48This ioctl call suspends the live video stream being played. Decoding
49and playing are frozen. It is then possible to restart the decoding and
50playing process of the video stream using the VIDEO_CONTINUE command.
51If VIDEO_SOURCE_MEMORY is selected in the ioctl call
52VIDEO_SELECT_SOURCE, the DVB subsystem will not decode any more data
53until the ioctl call VIDEO_CONTINUE or VIDEO_PLAY is performed.
54
55
56Return Value
57------------
58
59On success 0 is returned, on error -1 and the ``errno`` variable is set
60appropriately. The generic error codes are described at the
61:ref:`Generic Error Codes <gen-errors>` chapter.