| .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later |
| .. c:namespace:: DTV.video |
| |
| .. _VIDEO_FAST_FORWARD: |
| |
| ================== |
| VIDEO_FAST_FORWARD |
| ================== |
| |
| Name |
| ---- |
| |
| VIDEO_FAST_FORWARD |
| |
| .. attention:: This ioctl is deprecated. |
| |
| Synopsis |
| -------- |
| |
| .. c:macro:: VIDEO_FAST_FORWARD |
| |
| ``int ioctl(fd, VIDEO_FAST_FORWARD, int nFrames)`` |
| |
| 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 VIDEO_FAST_FORWARD for this command. |
| |
| - .. row 3 |
| |
| - int nFrames |
| |
| - The number of frames to skip. |
| |
| Description |
| ----------- |
| |
| This ioctl call asks the Video Device to skip decoding of N number of |
| I-frames. This call can only be used if VIDEO_SOURCE_MEMORY is |
| selected. |
| |
| 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 |
| |
| - ``EPERM`` |
| |
| - Mode VIDEO_SOURCE_MEMORY not selected. |
