64e4954619
The conversion script added some comments at the end. They point to the original DocBook files, with will be removed after the manual fixes. So, they'll be pointing to nowere. So, remove those comments. They'll be forever stored at the Kernel tree. So, if someone wants the references, it is just a matter of looking at the backlog. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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1.1 KiB
ReStructuredText
54 lines
1.1 KiB
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
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.. _VIDIOC_OVERLAY:
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********************
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ioctl VIDIOC_OVERLAY
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********************
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*man VIDIOC_OVERLAY(2)*
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Start or stop video overlay
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Synopsis
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========
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.. cpp:function:: int ioctl( int fd, int request, const int *argp )
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Arguments
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=========
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``fd``
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File descriptor returned by :ref:`open() <func-open>`.
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``request``
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VIDIOC_OVERLAY
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``argp``
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Description
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===========
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This ioctl is part of the :ref:`video overlay <overlay>` I/O method.
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Applications call :ref:`VIDIOC_OVERLAY` to start or stop the overlay. It
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takes a pointer to an integer which must be set to zero by the
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application to stop overlay, to one to start.
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Drivers do not support :ref:`VIDIOC_STREAMON` or
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:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` with
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``V4L2_BUF_TYPE_VIDEO_OVERLAY``.
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Return Value
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============
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On success 0 is returned, on error -1 and the ``errno`` variable is set
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appropriately. The generic error codes are described at the
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:ref:`Generic Error Codes <gen-errors>` chapter.
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EINVAL
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The overlay parameters have not been set up. See :ref:`overlay`
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for the necessary steps.
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