| .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later |
| |
| .. _DMX_START: |
| |
| ========= |
| DMX_START |
| ========= |
| |
| Name |
| ---- |
| |
| DMX_START |
| |
| |
| Synopsis |
| -------- |
| |
| .. c:function:: int ioctl( int fd, DMX_START) |
| :name: DMX_START |
| |
| |
| Arguments |
| --------- |
| |
| ``fd`` |
| File descriptor returned by :c:func:`open() <dvb-dmx-open>`. |
| |
| Description |
| ----------- |
| |
| This ioctl call is used to start the actual filtering operation defined |
| via the ioctl calls :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER`. |
| |
| |
| Return Value |
| ------------ |
| |
| On success 0 is returned. |
| |
| On error -1 is returned, and the ``errno`` variable is set |
| appropriately. |
| |
| .. tabularcolumns:: |p{2.5cm}|p{15.0cm}| |
| |
| .. flat-table:: |
| :header-rows: 0 |
| :stub-columns: 0 |
| |
| |
| - .. row 1 |
| |
| - ``EINVAL`` |
| |
| - Invalid argument, i.e. no filtering parameters provided via the |
| :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER` ioctls. |
| |
| - .. row 2 |
| |
| - ``EBUSY`` |
| |
| - This error code indicates that there are conflicting requests. |
| There are active filters filtering data from another input source. |
| Make sure that these filters are stopped before starting this |
| filter. |
| |
| |
| The generic error codes are described at the |
| :ref:`Generic Error Codes <gen-errors>` chapter. |
