0001 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
0002 .. c:namespace:: DTV.dmx
0003
0004 .. _DMX_SET_BUFFER_SIZE:
0005
0006 ===================
0007 DMX_SET_BUFFER_SIZE
0008 ===================
0009
0010 Name
0011 ----
0012
0013 DMX_SET_BUFFER_SIZE
0014
0015 Synopsis
0016 --------
0017
0018 .. c:macro:: DMX_SET_BUFFER_SIZE
0019
0020 ``int ioctl(int fd, DMX_SET_BUFFER_SIZE, unsigned long size)``
0021
0022 Arguments
0023 ---------
0024
0025 ``fd``
0026 File descriptor returned by :c:func:`open()`.
0027
0028 ``size``
0029 Unsigned long size
0030
0031 Description
0032 -----------
0033
0034 This ioctl call is used to set the size of the circular buffer used for
0035 filtered data. The default size is two maximum sized sections, i.e. if
0036 this function is not called a buffer size of ``2 * 4096`` bytes will be
0037 used.
0038
0039 Return Value
0040 ------------
0041
0042 On success 0 is returned.
0043
0044 On error -1 is returned, and the ``errno`` variable is set
0045 appropriately.
0046
0047 The generic error codes are described at the
0048 :ref:`Generic Error Codes <gen-errors>` chapter.
