1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2 .. c:namespace:: DTV.dmx 3 4 .. _DMX_SET_BUFFER_SIZE: 5 6 =================== 7 DMX_SET_BUFFER_SIZE 8 =================== 9 10 Name 11 ---- 12 13 DMX_SET_BUFFER_SIZE 14 15 Synopsis 16 -------- 17 18 .. c:macro:: DMX_SET_BUFFER_SIZE 19 20 ``int ioctl(int fd, DMX_SET_BUFFER_SIZE, unsigned long size)`` 21 22 Arguments 23 --------- 24 25 ``fd`` 26 File descriptor returned by :c:func:`open()`. 27 28 ``size`` 29 Unsigned long size 30 31 Description 32 ----------- 33 34 This ioctl call is used to set the size of the circular buffer used for 35 filtered data. The default size is two maximum sized sections, i.e. if 36 this function is not called a buffer size of ``2 * 4096`` bytes will be 37 used. 38 39 Return Value 40 ------------ 41 42 On success 0 is returned. 43 44 On error -1 is returned, and the ``errno`` variable is set 45 appropriately. 46 47 The generic error codes are described at the 48 :ref:`Generic Error Codes <gen-errors>` chapter.
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