| .. -*- coding: utf-8; mode: rst -*- |
| |
| .. _VIDEO_GET_FRAME_RATE: |
| |
| ==================== |
| VIDEO_GET_FRAME_RATE |
| ==================== |
| |
| Name |
| ---- |
| |
| VIDEO_GET_FRAME_RATE |
| |
| |
| Synopsis |
| -------- |
| |
| .. cpp:function:: int ioctl(int fd, int request = VIDEO_GET_FRAME_RATE, unsigned int *rate) |
| |
| |
| Arguments |
| --------- |
| |
| .. flat-table:: |
| :header-rows: 0 |
| :stub-columns: 0 |
| |
| |
| - .. row 1 |
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| - int fd |
| |
| - File descriptor returned by a previous call to open(). |
| |
| - .. row 2 |
| |
| - int request |
| |
| - Equals VIDEO_GET_FRAME_RATE for this command. |
| |
| - .. row 3 |
| |
| - unsigned int \*rate |
| |
| - Returns the framerate in number of frames per 1000 seconds. |
| |
| |
| Description |
| ----------- |
| |
| This ioctl call asks the Video Device to return the current framerate. |
| |
| |
| 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. |