Commit | Line | Data |
---|---|---|
47d23e36 MCC |
1 | .. -*- coding: utf-8; mode: rst -*- |
2 | ||
3 | .. _DMX_GET_STC: | |
4 | ||
586027ce | 5 | =========== |
47d23e36 MCC |
6 | DMX_GET_STC |
7 | =========== | |
8 | ||
15e7d615 | 9 | Name |
586027ce | 10 | ---- |
47d23e36 | 11 | |
586027ce | 12 | DMX_GET_STC |
47d23e36 | 13 | |
15e7d615 MCC |
14 | |
15 | Synopsis | |
47d23e36 MCC |
16 | -------- |
17 | ||
cf8076c3 MCC |
18 | .. c:function:: int ioctl( int fd, DMX_GET_STC, struct dmx_stc *stc) |
19 | :name: DMX_GET_STC | |
47d23e36 | 20 | |
15e7d615 | 21 | Arguments |
586027ce | 22 | --------- |
47d23e36 | 23 | |
cf8076c3 MCC |
24 | ``fd`` |
25 | File descriptor returned by :c:func:`open() <dvb-dmx-open>`. | |
47d23e36 | 26 | |
cf8076c3 MCC |
27 | ``stc`` |
28 | Pointer to the location where the stc is to be stored. | |
47d23e36 MCC |
29 | |
30 | ||
15e7d615 | 31 | Description |
586027ce MCC |
32 | ----------- |
33 | ||
34 | This ioctl call returns the current value of the system time counter | |
35 | (which is driven by a PES filter of type DMX_PES_PCR). Some hardware | |
36 | supports more than one STC, so you must specify which one by setting the | |
37 | num field of stc before the ioctl (range 0...n). The result is returned | |
38 | in form of a ratio with a 64 bit numerator and a 32 bit denominator, so | |
39 | the real 90kHz STC value is stc->stc / stc->base . | |
40 | ||
41 | ||
15e7d615 | 42 | Return Value |
47d23e36 MCC |
43 | ------------ |
44 | ||
45 | On success 0 is returned, on error -1 and the ``errno`` variable is set | |
46 | appropriately. The generic error codes are described at the | |
47 | :ref:`Generic Error Codes <gen-errors>` chapter. | |
48 | ||
47d23e36 MCC |
49 | .. flat-table:: |
50 | :header-rows: 0 | |
51 | :stub-columns: 0 | |
52 | ||
53 | ||
54 | - .. row 1 | |
55 | ||
56 | - ``EINVAL`` | |
57 | ||
58 | - Invalid stc number. |