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| >SDL_CD</H1 |
| ><DIV |
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| ><A |
| NAME="AEN7566" |
| ></A |
| ><H2 |
| >Name</H2 |
| >SDL_CD -- CDROM Drive Information</DIV |
| ><DIV |
| CLASS="REFSECT1" |
| ><A |
| NAME="AEN7569" |
| ></A |
| ><H2 |
| >Structure Definition</H2 |
| ><PRE |
| CLASS="PROGRAMLISTING" |
| >typedef struct{ |
| int id; |
| CDstatus status; |
| int numtracks; |
| int cur_track; |
| int cur_frame; |
| SDL_CDtrack track[SDL_MAX_TRACKS+1]; |
| } SDL_CD;</PRE |
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| ><H2 |
| >Structure Data</H2 |
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| ><I |
| >id</I |
| ></TT |
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| >Private drive identifier</TD |
| ></TR |
| ><TR |
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| ><TT |
| CLASS="STRUCTFIELD" |
| ><I |
| >status</I |
| ></TT |
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| >Drive <A |
| HREF="sdlcdstatus.html" |
| >status</A |
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| ><TT |
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| ><I |
| >numtracks</I |
| ></TT |
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| ALIGN="LEFT" |
| VALIGN="TOP" |
| >Number of tracks on the CD</TD |
| ></TR |
| ><TR |
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| VALIGN="TOP" |
| ><TT |
| CLASS="STRUCTFIELD" |
| ><I |
| >cur_track</I |
| ></TT |
| ></TD |
| ><TD |
| ALIGN="LEFT" |
| VALIGN="TOP" |
| >Current track</TD |
| ></TR |
| ><TR |
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| ALIGN="LEFT" |
| VALIGN="TOP" |
| ><TT |
| CLASS="STRUCTFIELD" |
| ><I |
| >cur_frame</I |
| ></TT |
| ></TD |
| ><TD |
| ALIGN="LEFT" |
| VALIGN="TOP" |
| >Current frame offset within the track</TD |
| ></TR |
| ><TR |
| ><TD |
| ALIGN="LEFT" |
| VALIGN="TOP" |
| ><TT |
| CLASS="STRUCTFIELD" |
| ><I |
| >track</I |
| ></TT |
| >[SDL_MAX_TRACKS+1]</TD |
| ><TD |
| ALIGN="LEFT" |
| VALIGN="TOP" |
| >Array of track descriptions. (see <A |
| HREF="sdlcdtrack.html" |
| ><SPAN |
| CLASS="STRUCTNAME" |
| >SDL_CDtrack</SPAN |
| ></A |
| >)</TD |
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| ></TBODY |
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| ></DIV |
| ></DIV |
| ><DIV |
| CLASS="REFSECT1" |
| ><A |
| NAME="AEN7604" |
| ></A |
| ><H2 |
| >Description</H2 |
| ><P |
| >An <SPAN |
| CLASS="STRUCTNAME" |
| >SDL_CD</SPAN |
| > structure is returned by <A |
| HREF="sdlcdopen.html" |
| ><TT |
| CLASS="FUNCTION" |
| >SDL_CDOpen</TT |
| ></A |
| >. It represents an opened CDROM device and stores information on the layout of the tracks on the disc.</P |
| ><P |
| >A frame is the base data unit of a CD. <TT |
| CLASS="LITERAL" |
| >CD_FPS</TT |
| > frames is equal to 1 second of music. SDL provides two macros for converting between time and frames: <TT |
| CLASS="LITERAL" |
| >FRAMES_TO_MSF(f, M,S,F)</TT |
| > and <TT |
| CLASS="LITERAL" |
| >MSF_TO_FRAMES</TT |
| >.</P |
| ></DIV |
| ><DIV |
| CLASS="REFSECT1" |
| ><A |
| NAME="AEN7614" |
| ></A |
| ><H2 |
| >Examples</H2 |
| ><PRE |
| CLASS="PROGRAMLISTING" |
| >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\n", min, sec, frame); |
| |
| frame_offset=MSF_TO_FRAMES(min, sec, frame);</PRE |
| ></DIV |
| ><DIV |
| CLASS="REFSECT1" |
| ><A |
| NAME="AEN7617" |
| ></A |
| ><H2 |
| >See Also</H2 |
| ><P |
| ><A |
| HREF="sdlcdopen.html" |
| ><TT |
| CLASS="FUNCTION" |
| >SDL_CDOpen</TT |
| ></A |
| >, |
| <A |
| HREF="sdlcdtrack.html" |
| ><SPAN |
| CLASS="STRUCTNAME" |
| >SDL_CDtrack</SPAN |
| ></A |
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