| .. -*- coding: utf-8; mode: rst -*- |
| |
| .. _DMX_GET_STC: |
| |
| =========== |
| DMX_GET_STC |
| =========== |
| |
| Name |
| ---- |
| |
| DMX_GET_STC |
| |
| |
| Synopsis |
| -------- |
| |
| .. c:function:: int ioctl( int fd, DMX_GET_STC, struct dmx_stc *stc) |
| :name: DMX_GET_STC |
| |
| Arguments |
| --------- |
| |
| ``fd`` |
| File descriptor returned by :c:func:`open() <dvb-dmx-open>`. |
| |
| ``stc`` |
| Pointer to the location where the stc is to be stored. |
| |
| |
| Description |
| ----------- |
| |
| This ioctl call returns the current value of the system time counter |
| (which is driven by a PES filter of type DMX_PES_PCR). Some hardware |
| supports more than one STC, so you must specify which one by setting the |
| num field of stc before the ioctl (range 0...n). The result is returned |
| in form of a ratio with a 64 bit numerator and a 32 bit denominator, so |
| the real 90kHz STC value is stc->stc / stc->base . |
| |
| |
| Return Value |
| ------------ |
| |
| On success 0 is returned, on error -1 and the ``errno`` variable is set |
| appropriately. The generic error codes are described at the |
| :ref:`Generic Error Codes <gen-errors>` chapter. |
| |
| .. flat-table:: |
| :header-rows: 0 |
| :stub-columns: 0 |
| |
| |
| - .. row 1 |
| |
| - ``EINVAL`` |
| |
| - Invalid stc number. |
