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gerrit-public.fairphone.software / kernel / msm-4.9 / 60c2820d0f6d3497975b6488e2599f8f611d8b95 / . / Documentation / media / uapi / dvb / video-fast-forward.rst
blob: db338e9f5379c7a3d02aa0a029fd588c023c63a9 [file] [log] [blame]
Mauro Carvalho Chehab47d23e32016-07-05 10:37:31 -0300[diff] [blame]1.. -*- coding: utf-8; mode: rst -*-
2
3.. _VIDEO_FAST_FORWARD:
4
Mauro Carvalho Chehab586027c2016-07-05 07:58:48 -0300[diff] [blame]5==================
Mauro Carvalho Chehab47d23e32016-07-05 10:37:31 -0300[diff] [blame]6VIDEO_FAST_FORWARD
7==================
8
Mauro Carvalho Chehab15e7d612016-07-05 15:14:35 -0300[diff] [blame]9Name
Mauro Carvalho Chehab586027c2016-07-05 07:58:48 -0300[diff] [blame]10----
Mauro Carvalho Chehab47d23e32016-07-05 10:37:31 -0300[diff] [blame]11
Mauro Carvalho Chehab586027c2016-07-05 07:58:48 -0300[diff] [blame]12VIDEO_FAST_FORWARD
Mauro Carvalho Chehab47d23e32016-07-05 10:37:31 -0300[diff] [blame]13
Mauro Carvalho Chehab15e7d612016-07-05 15:14:35 -0300[diff] [blame]14
15Synopsis
Mauro Carvalho Chehab47d23e32016-07-05 10:37:31 -0300[diff] [blame]16--------
17
Mauro Carvalho Chehab5929cb12016-07-05 15:22:59 -0300[diff] [blame]18.. cpp:function:: int ioctl(fd, int request = VIDEO_FAST_FORWARD, int nFrames)
Mauro Carvalho Chehab47d23e32016-07-05 10:37:31 -0300[diff] [blame]19
Mauro Carvalho Chehab47d23e32016-07-05 10:37:31 -0300[diff] [blame]20
Mauro Carvalho Chehab15e7d612016-07-05 15:14:35 -0300[diff] [blame]21Arguments
Mauro Carvalho Chehab586027c2016-07-05 07:58:48 -0300[diff] [blame]22---------
Mauro Carvalho Chehab47d23e32016-07-05 10:37:31 -0300[diff] [blame]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_FAST_FORWARD for this command.
40
41 - .. row 3
42
43 - int nFrames
44
45 - The number of frames to skip.
46
47
Mauro Carvalho Chehab15e7d612016-07-05 15:14:35 -0300[diff] [blame]48Description
Mauro Carvalho Chehab586027c2016-07-05 07:58:48 -0300[diff] [blame]49-----------
50
51This ioctl call asks the Video Device to skip decoding of N number of
52I-frames. This call can only be used if VIDEO_SOURCE_MEMORY is
53selected.
54
55
Mauro Carvalho Chehab15e7d612016-07-05 15:14:35 -0300[diff] [blame]56Return Value
Mauro Carvalho Chehab47d23e32016-07-05 10:37:31 -0300[diff] [blame]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.
62
63
64
65.. flat-table::
66 :header-rows: 0
67 :stub-columns: 0
68
69
70 - .. row 1
71
72 - ``EPERM``
73
74 - Mode VIDEO_SOURCE_MEMORY not selected.