| int fd | File descriptor returned by a previous call to open(). | 
| int request | Equals VIDEO_SET_SPU for this command. | 
| video_spu_t *spu | SPU decoding (de)activation and subid setting according to section ??. | 
This ioctl activates or deactivates SPU decoding in a DVD input stream. It can only be used, if the driver is able to handle a DVD stream.
typedef struct video_spu {
        int active;
        int stream_id;
} video_spu_t;
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.
| EINVAL | input is not a valid spu setting or driver cannot handle SPU. |