projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 47d23e36 MCC |
1 | .. -*- coding: utf-8; mode: rst -*- |
| 2 | ||
| 3 | .. _VIDEO_FAST_FORWARD: | |
| 4 | ||
| 5 | VIDEO_FAST_FORWARD | |
| 6 | ================== | |
| 7 | ||
| 8 | Description | |
| 9 | ----------- | |
| 10 | ||
| 11 | This ioctl call asks the Video Device to skip decoding of N number of | |
| 12 | I-frames. This call can only be used if VIDEO_SOURCE_MEMORY is | |
| 13 | selected. | |
| 14 | ||
| 15 | Synopsis | |
| 16 | -------- | |
| 17 | ||
| 18 | .. c:function:: int ioctl(fd, int request = VIDEO_FAST_FORWARD, int nFrames) | |
| 19 | ||
| 20 | Arguments | |
| 21 | ---------- | |
| 22 | ||
| 23 | ||
| 24 | ||
| 25 | .. flat-table:: | |
| 26 | :header-rows: 0 | |
| 27 | :stub-columns: 0 | |
| 28 | ||
| 29 | ||
| 30 | - .. row 1 | |
| 31 | ||
| 32 | - int fd | |
| 33 | ||
| 34 | - File descriptor returned by a previous call to open(). | |
| 35 | ||
| 36 | - .. row 2 | |
| 37 | ||
| 38 | - int request | |
| 39 | ||
| 40 | - Equals VIDEO_FAST_FORWARD for this command. | |
| 41 | ||
| 42 | - .. row 3 | |
| 43 | ||
| 44 | - int nFrames | |
| 45 | ||
| 46 | - The number of frames to skip. | |
| 47 | ||
| 48 | ||
| 49 | Return Value | |
| 50 | ------------ | |
| 51 | ||
| 52 | On success 0 is returned, on error -1 and the ``errno`` variable is set | |
| 53 | appropriately. The generic error codes are described at the | |
| 54 | :ref:`Generic Error Codes <gen-errors>` chapter. | |
| 55 | ||
| 56 | ||
| 57 | ||
| 58 | .. flat-table:: | |
| 59 | :header-rows: 0 | |
| 60 | :stub-columns: 0 | |
| 61 | ||
| 62 | ||
| 63 | - .. row 1 | |
| 64 | ||
| 65 | - ``EPERM`` | |
| 66 | ||
| 67 | - Mode VIDEO_SOURCE_MEMORY not selected. | |
| 68 | ||
| 69 | ||
| 70 |