| int fd | File descriptor returned by a previous call to open(). |
| int request | Equals VIDEO_GET_CAPABILITIES for this command. |
| unsigned int *cap | Pointer to a location where to store the capability information. |
This ioctl call asks the video device about its decoding capabilities. On success it returns and integer which has bits set according to the defines in section ??.
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.