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>SDL_CD</TITLE |
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>SDL Library Documentation</TH |
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><H1 |
><A |
NAME="SDLCD" |
>SDL_CD</A |
></H1 |
><DIV |
CLASS="REFNAMEDIV" |
><A |
NAME="AEN7017" |
></A |
><H2 |
>Name</H2 |
>SDL_CD -- CDROM Drive Information</DIV |
><DIV |
CLASS="REFSECT1" |
><A |
NAME="AEN7020" |
></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 |
></DIV |
><DIV |
CLASS="REFSECT1" |
><A |
NAME="AEN7023" |
></A |
><H2 |
>Structure Data</H2 |
><DIV |
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><A |
NAME="AEN7025" |
></A |
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><TD |
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><TT |
CLASS="STRUCTFIELD" |
><I |
>id</I |
></TT |
></TD |
><TD |
ALIGN="LEFT" |
VALIGN="TOP" |
>Private drive identifier</TD |
></TR |
><TR |
><TD |
ALIGN="LEFT" |
VALIGN="TOP" |
><TT |
CLASS="STRUCTFIELD" |
><I |
>status</I |
></TT |
></TD |
><TD |
ALIGN="LEFT" |
VALIGN="TOP" |
>Drive <A |
HREF="sdlcdstatus.html" |
>status</A |
></TD |
></TR |
><TR |
><TD |
ALIGN="LEFT" |
VALIGN="TOP" |
><TT |
CLASS="STRUCTFIELD" |
><I |
>numtracks</I |
></TT |
></TD |
><TD |
ALIGN="LEFT" |
VALIGN="TOP" |
>Number of tracks on the CD</TD |
></TR |
><TR |
><TD |
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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 |
><TD |
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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><P |
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><DIV |
CLASS="REFSECT1" |
><A |
NAME="AEN7055" |
></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="AEN7065" |
></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 |
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><A |
NAME="AEN7068" |
></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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