int fd | File descriptor returned by a previous call to open(). |
int request | Equals VIDEO_GET_FRAME_RATE for this command. |
unsigned int *rate | Returns the framerate in number of frames per 1000 seconds. |
This ioctl call asks the Video Device to return the current framerate.
On success 0 is returned, on error -1 and the errno variable is set appropriately. The generic error codes are described at the Generic Error Codes chapter.