linux-stable/Documentation/userspace-api/media/dvb/dmx-set-buffer-size.rst
Mauro Carvalho Chehab f9b2e8aa32 media: docs: make DVB documents more compatible with Sphinx 3.1+
Sphinx 3.x broke support for the cdomain.py extension, as the
c domain code was rewritten. Due to that, the c tags need to
be re-written, in order to use the new c domain notation.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-10-15 07:49:39 +02:00

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.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: DTV.dmx
.. _DMX_SET_BUFFER_SIZE:
===================
DMX_SET_BUFFER_SIZE
===================
Name
----
DMX_SET_BUFFER_SIZE
Synopsis
--------
.. c:macro:: DMX_SET_BUFFER_SIZE
``int ioctl(int fd, DMX_SET_BUFFER_SIZE, unsigned long size)``
Arguments
---------
``fd``
File descriptor returned by :c:func:`open()`.
``size``
Unsigned long size
Description
-----------
This ioctl call is used to set the size of the circular buffer used for
filtered data. The default size is two maximum sized sections, i.e. if
this function is not called a buffer size of ``2 * 4096`` bytes will be
used.
Return Value
------------
On success 0 is returned.
On error -1 is returned, and the ``errno`` variable is set
appropriately.
The generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.