Sortix volatile manual

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SDL_CD(3)

SDL API Reference

SDL_CD(3)

NAME

SDL_CD - CDROM Drive Information

STRUCTURE DEFINITION

typedef struct{
int id;
CDstatus status;
int numtracks;
int cur_track;
int cur_frame;
SDL_CDtrack track[SDL_MAX_TRACKS+1];
} SDL_CD;

STRUCTURE DATA

id: Private drive identifier

status: Drive status

numtracks: Number of tracks on the CD

cur_track: Current track

cur_frame: Current frame offset within the track

track[SDL_MAX_TRACKS+1]: Array of track descriptions. (see SDL_CDtrack)

DESCRIPTION

An SDL_CD structure is returned by SDL_CDOpen. It represents an opened CDROM device and stores information on the layout of the tracks on the disc.

A frame is the base data unit of a CD. CD_FPS frames is equal to 1 second of music. SDL provides two macros for converting between time and frames: FRAMES_TO_MSF(f, M,S,F) and MSF_TO_FRAMES.

EXAMPLES

int min, sec, frame;
int frame_offset;

FRAMES_TO_MSF(cdrom->cur_frame, &min, &sec, &frame);
printf("Current Position: %d minutes, %d seconds, %d frames
", min, sec, frame);

frame_offset=MSF_TO_FRAMES(min, sec, frame);