18c2ecf20Sopenharmony_ci.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 28c2ecf20Sopenharmony_ci.. c:namespace:: DTV.dmx 38c2ecf20Sopenharmony_ci 48c2ecf20Sopenharmony_ci.. _DMX_START: 58c2ecf20Sopenharmony_ci 68c2ecf20Sopenharmony_ci========= 78c2ecf20Sopenharmony_ciDMX_START 88c2ecf20Sopenharmony_ci========= 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_ciName 118c2ecf20Sopenharmony_ci---- 128c2ecf20Sopenharmony_ci 138c2ecf20Sopenharmony_ciDMX_START 148c2ecf20Sopenharmony_ci 158c2ecf20Sopenharmony_ciSynopsis 168c2ecf20Sopenharmony_ci-------- 178c2ecf20Sopenharmony_ci 188c2ecf20Sopenharmony_ci.. c:macro:: DMX_START 198c2ecf20Sopenharmony_ci 208c2ecf20Sopenharmony_ci``int ioctl(int fd, DMX_START)`` 218c2ecf20Sopenharmony_ci 228c2ecf20Sopenharmony_ciArguments 238c2ecf20Sopenharmony_ci--------- 248c2ecf20Sopenharmony_ci 258c2ecf20Sopenharmony_ci``fd`` 268c2ecf20Sopenharmony_ci File descriptor returned by :c:func:`open()`. 278c2ecf20Sopenharmony_ci 288c2ecf20Sopenharmony_ciDescription 298c2ecf20Sopenharmony_ci----------- 308c2ecf20Sopenharmony_ci 318c2ecf20Sopenharmony_ciThis ioctl call is used to start the actual filtering operation defined 328c2ecf20Sopenharmony_civia the ioctl calls :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER`. 338c2ecf20Sopenharmony_ci 348c2ecf20Sopenharmony_ciReturn Value 358c2ecf20Sopenharmony_ci------------ 368c2ecf20Sopenharmony_ci 378c2ecf20Sopenharmony_ciOn success 0 is returned. 388c2ecf20Sopenharmony_ci 398c2ecf20Sopenharmony_ciOn error -1 is returned, and the ``errno`` variable is set 408c2ecf20Sopenharmony_ciappropriately. 418c2ecf20Sopenharmony_ci 428c2ecf20Sopenharmony_ci.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| 438c2ecf20Sopenharmony_ci 448c2ecf20Sopenharmony_ci.. flat-table:: 458c2ecf20Sopenharmony_ci :header-rows: 0 468c2ecf20Sopenharmony_ci :stub-columns: 0 478c2ecf20Sopenharmony_ci 488c2ecf20Sopenharmony_ci - .. row 1 498c2ecf20Sopenharmony_ci 508c2ecf20Sopenharmony_ci - ``EINVAL`` 518c2ecf20Sopenharmony_ci 528c2ecf20Sopenharmony_ci - Invalid argument, i.e. no filtering parameters provided via the 538c2ecf20Sopenharmony_ci :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER` ioctls. 548c2ecf20Sopenharmony_ci 558c2ecf20Sopenharmony_ci - .. row 2 568c2ecf20Sopenharmony_ci 578c2ecf20Sopenharmony_ci - ``EBUSY`` 588c2ecf20Sopenharmony_ci 598c2ecf20Sopenharmony_ci - This error code indicates that there are conflicting requests. 608c2ecf20Sopenharmony_ci There are active filters filtering data from another input source. 618c2ecf20Sopenharmony_ci Make sure that these filters are stopped before starting this 628c2ecf20Sopenharmony_ci filter. 638c2ecf20Sopenharmony_ci 648c2ecf20Sopenharmony_ciThe generic error codes are described at the 658c2ecf20Sopenharmony_ci:ref:`Generic Error Codes <gen-errors>` chapter. 66