projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
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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 | |
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16 | -------- |
| 17 | ||
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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 | |
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24 | ``fd`` |
| 25 | File descriptor returned by :c:func:`open() <dvb-dmx-open>`. | |
| 47d23e36 | 26 | |
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27 | ``stc`` |
| 28 | Pointer to the location where the stc is to be stored. | |
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29 | |
| 30 | ||
| 15e7d615 | 31 | Description |
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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 |
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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 | ||
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49 | .. flat-table:: |
| 50 | :header-rows: 0 | |
| 51 | :stub-columns: 0 | |
| 52 | ||
| 53 | ||
| 54 | - .. row 1 | |
| 55 | ||
| 56 | - ``EINVAL`` | |
| 57 | ||
| 58 | - Invalid stc number. |