Based on kernel version 6.8
. Page generated on 2024-03-11 21:26 EST
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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 56 57 58 59 60 61 62 63 64 | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later .. c:namespace:: DTV.dmx .. _DMX_GET_STC: =========== DMX_GET_STC =========== Name ---- DMX_GET_STC Synopsis -------- .. c:macro:: DMX_GET_STC ``int ioctl(int fd, DMX_GET_STC, struct dmx_stc *stc)`` Arguments --------- ``fd`` File descriptor returned by :c:func:`open()`. ``stc`` Pointer to :c:type:`dmx_stc` where the stc data 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 :c:type:`DMX_PES_PCR <dmx_ts_pes>`). Some hardware supports more than one STC, so you must specify which one by setting the :c:type:`num <dmx_stc>` 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 is returned, and the ``errno`` variable is set appropriately. .. tabularcolumns:: |p{2.5cm}|p{15.0cm}| .. flat-table:: :header-rows: 0 :stub-columns: 0 :widths: 1 16 - .. row 1 - ``EINVAL`` - Invalid stc number. The generic error codes are described at the :ref:`Generic Error Codes <gen-errors>` chapter. |