tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1.. -*- coding: utf-8; mode: rst -*-
2
3.. _VIDEO_FAST_FORWARD:
4
5==================
6VIDEO_FAST_FORWARD
7==================
8
9Name
10----
11
12VIDEO_FAST_FORWARD
13
14.. attention:: This ioctl is deprecated.
15
16Synopsis
17--------
18
19.. c:function:: int ioctl(fd, VIDEO_FAST_FORWARD, int nFrames)
20 :name: VIDEO_FAST_FORWARD
21
22
23Arguments
24---------
25
26.. flat-table::
27 :header-rows: 0
28 :stub-columns: 0
29
30
31 - .. row 1
32
33 - int fd
34
35 - File descriptor returned by a previous call to open().
36
37 - .. row 2
38
39 - int request
40
41 - Equals VIDEO_FAST_FORWARD for this command.
42
43 - .. row 3
44
45 - int nFrames
46
47 - The number of frames to skip.
48
49
50Description
51-----------
52
53This ioctl call asks the Video Device to skip decoding of N number of
54I-frames. This call can only be used if VIDEO_SOURCE_MEMORY is
55selected.
56
57
58Return Value
59------------
60
61On success 0 is returned, on error -1 and the ``errno`` variable is set
62appropriately. The generic error codes are described at the
63:ref:`Generic Error Codes <gen-errors>` chapter.
64
65
66
67.. flat-table::
68 :header-rows: 0
69 :stub-columns: 0
70
71
72 - .. row 1
73
74 - ``EPERM``
75
76 - Mode VIDEO_SOURCE_MEMORY not selected.