forked from Minki/linux
60c2820d0f
The name of the subsystem is "media", and not "linux_tv". Also, as we plan to add other stuff there in the future, let's rename also the media uAPI book to media_uapi, to make it clearer. No functional changes. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
78 lines
1.3 KiB
ReStructuredText
78 lines
1.3 KiB
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
|
|
|
|
.. _DMX_START:
|
|
|
|
=========
|
|
DMX_START
|
|
=========
|
|
|
|
Name
|
|
----
|
|
|
|
DMX_START
|
|
|
|
|
|
Synopsis
|
|
--------
|
|
|
|
.. cpp:function:: int ioctl( int fd, int request = DMX_START)
|
|
|
|
|
|
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 DMX_START for this command.
|
|
|
|
|
|
Description
|
|
-----------
|
|
|
|
This ioctl call is used to start the actual filtering operation defined
|
|
via the ioctl calls DMX_SET_FILTER or DMX_SET_PES_FILTER.
|
|
|
|
|
|
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.
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
|
|
- .. row 1
|
|
|
|
- ``EINVAL``
|
|
|
|
- Invalid argument, i.e. no filtering parameters provided via the
|
|
DMX_SET_FILTER or DMX_SET_PES_FILTER functions.
|
|
|
|
- .. row 2
|
|
|
|
- ``EBUSY``
|
|
|
|
- This error code indicates that there are conflicting requests.
|
|
There are active filters filtering data from another input source.
|
|
Make sure that these filters are stopped before starting this
|
|
filter.
|