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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later .. c:namespace:: DTV.dmx .. _DMX_SET_FILTER: ============== DMX_SET_FILTER ============== Name ---- DMX_SET_FILTER Synopsis -------- .. c:macro:: DMX_SET_FILTER ``int ioctl(int fd, DMX_SET_FILTER, struct dmx_sct_filter_params *params)`` Arguments --------- ``fd`` File descriptor returned by :c:func:`open()`. ``params`` Pointer to structure containing filter parameters. Description ----------- This ioctl call sets up a filter according to the filter and mask parameters provided. A timeout may be defined stating number of seconds to wait for a section to be loaded. A value of 0 means that no timeout should be applied. Finally there is a flag field where it is possible to state whether a section should be CRC-checked, whether the filter should be a "one-shot" filter, i.e. if the filtering operation should be stopped after the first section is received, and whether the filtering operation should be started immediately (without waiting for a :ref:`DMX_START` ioctl call). If a filter was previously set-up, this filter will be canceled, and the receive buffer will be flushed. 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. |