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Diffstat (limited to 'Documentation/media/uapi/dvb/dmx-get-stc.rst')
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diff --git a/Documentation/media/uapi/dvb/dmx-get-stc.rst b/Documentation/media/uapi/dvb/dmx-get-stc.rst new file mode 100644 index 0000000..bd477bb --- /dev/null +++ b/Documentation/media/uapi/dvb/dmx-get-stc.rst @@ -0,0 +1,77 @@ +.. -*- coding: utf-8; mode: rst -*- + +.. _DMX_GET_STC: + +=========== +DMX_GET_STC +=========== + +Name +---- + +DMX_GET_STC + + +Synopsis +-------- + +.. cpp:function:: int ioctl( int fd, int request = DMX_GET_STC, struct dmx_stc *stc) + + +Arguments +--------- + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + + - .. row 1 + + - int fd + + - File descriptor returned by a previous call to open(). + + - .. row 2 + + - int request + + - Equals DMX_GET_STC for this command. + + - .. row 3 + + - struct dmx_stc \*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. |