1 .. -*- coding: utf-8; mode: rst -*-
18 .. cpp:function:: int ioctl( int fd, int request = DMX_GET_STC, struct dmx_stc *stc)
33 - File descriptor returned by a previous call to open().
39 - Equals DMX_GET_STC for this command.
43 - struct dmx_stc \*stc
45 - Pointer to the location where the stc is to be stored.
51 This ioctl call returns the current value of the system time counter
52 (which is driven by a PES filter of type DMX_PES_PCR). Some hardware
53 supports more than one STC, so you must specify which one by setting the
54 num field of stc before the ioctl (range 0...n). The result is returned
55 in form of a ratio with a 64 bit numerator and a 32 bit denominator, so
56 the real 90kHz STC value is stc->stc / stc->base .
62 On success 0 is returned, on error -1 and the ``errno`` variable is set
63 appropriately. The generic error codes are described at the
64 :ref:`Generic Error Codes <gen-errors>` chapter.