Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) .. c:namespace:: DTV.dmx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) .. _DMX_GET_STC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) ===========
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) DMX_GET_STC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) ===========
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) Name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) ----
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) DMX_GET_STC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) Synopsis
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) --------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) .. c:macro:: DMX_GET_STC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) ``int ioctl(int fd, DMX_GET_STC, struct dmx_stc *stc)``
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) Arguments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) ---------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) ``fd``
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)     File descriptor returned by :c:func:`open()`.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) ``stc``
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)     Pointer to :c:type:`dmx_stc` where the stc data is to be stored.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) Description
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) -----------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) This ioctl call returns the current value of the system time counter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) (which is driven by a PES filter of type :c:type:`DMX_PES_PCR <dmx_ts_pes>`).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) Some hardware supports more than one STC, so you must specify which one by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) setting the :c:type:`num <dmx_stc>` field of stc before the ioctl (range 0...n).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) The result is returned in form of a ratio with a 64 bit numerator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) and a 32 bit denominator, so the real 90kHz STC value is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) ``stc->stc / stc->base``.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) Return Value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) ------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) On success 0 is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) On error -1 is returned, and the ``errno`` variable is set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) appropriately.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) .. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) .. flat-table::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)     :header-rows:  0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)     :stub-columns: 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)     :widths: 1 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)     -  .. row 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)        -  ``EINVAL``
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)        -  Invalid stc number.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) The generic error codes are described at the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) :ref:`Generic Error Codes <gen-errors>` chapter.