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  40 >SDL Library Documentation</TH
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  71 ><H1
  72 ><A
  73 NAME="SDLCD"
  74 ></A
  75 >SDL_CD</H1
  76 ><DIV
  77 CLASS="REFNAMEDIV"
  78 ><A
  79 NAME="AEN7566"
  80 ></A
  81 ><H2
  82 >Name</H2
  83 >SDL_CD&nbsp;--&nbsp;CDROM Drive Information</DIV
  84 ><DIV
  85 CLASS="REFSECT1"
  86 ><A
  87 NAME="AEN7569"
  88 ></A
  89 ><H2
  90 >Structure Definition</H2
  91 ><PRE
  92 CLASS="PROGRAMLISTING"
  93 >typedef struct{
  94   int id;
  95   CDstatus status;
  96   int numtracks;
  97   int cur_track;
  98   int cur_frame;
  99   SDL_CDtrack track[SDL_MAX_TRACKS+1];
 100 } SDL_CD;</PRE
 101 ></DIV
 102 ><DIV
 103 CLASS="REFSECT1"
 104 ><A
 105 NAME="AEN7572"
 106 ></A
 107 ><H2
 108 >Structure Data</H2
 109 ><DIV
 110 CLASS="INFORMALTABLE"
 111 ><A
 112 NAME="AEN7574"
 113 ></A
 114 ><P
 115 ></P
 116 ><TABLE
 117 BORDER="0"
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 119 ><TBODY
 120 ><TR
 121 ><TD
 122 ALIGN="LEFT"
 123 VALIGN="TOP"
 124 ><TT
 125 CLASS="STRUCTFIELD"
 126 ><I
 127 >id</I
 128 ></TT
 129 ></TD
 130 ><TD
 131 ALIGN="LEFT"
 132 VALIGN="TOP"
 133 >Private drive identifier</TD
 134 ></TR
 135 ><TR
 136 ><TD
 137 ALIGN="LEFT"
 138 VALIGN="TOP"
 139 ><TT
 140 CLASS="STRUCTFIELD"
 141 ><I
 142 >status</I
 143 ></TT
 144 ></TD
 145 ><TD
 146 ALIGN="LEFT"
 147 VALIGN="TOP"
 148 >Drive <A
 149 HREF="sdlcdstatus.html"
 150 >status</A
 151 ></TD
 152 ></TR
 153 ><TR
 154 ><TD
 155 ALIGN="LEFT"
 156 VALIGN="TOP"
 157 ><TT
 158 CLASS="STRUCTFIELD"
 159 ><I
 160 >numtracks</I
 161 ></TT
 162 ></TD
 163 ><TD
 164 ALIGN="LEFT"
 165 VALIGN="TOP"
 166 >Number of tracks on the CD</TD
 167 ></TR
 168 ><TR
 169 ><TD
 170 ALIGN="LEFT"
 171 VALIGN="TOP"
 172 ><TT
 173 CLASS="STRUCTFIELD"
 174 ><I
 175 >cur_track</I
 176 ></TT
 177 ></TD
 178 ><TD
 179 ALIGN="LEFT"
 180 VALIGN="TOP"
 181 >Current track</TD
 182 ></TR
 183 ><TR
 184 ><TD
 185 ALIGN="LEFT"
 186 VALIGN="TOP"
 187 ><TT
 188 CLASS="STRUCTFIELD"
 189 ><I
 190 >cur_frame</I
 191 ></TT
 192 ></TD
 193 ><TD
 194 ALIGN="LEFT"
 195 VALIGN="TOP"
 196 >Current frame offset within the track</TD
 197 ></TR
 198 ><TR
 199 ><TD
 200 ALIGN="LEFT"
 201 VALIGN="TOP"
 202 ><TT
 203 CLASS="STRUCTFIELD"
 204 ><I
 205 >track</I
 206 ></TT
 207 >[SDL_MAX_TRACKS+1]</TD
 208 ><TD
 209 ALIGN="LEFT"
 210 VALIGN="TOP"
 211 >Array of track descriptions. (see <A
 212 HREF="sdlcdtrack.html"
 213 ><SPAN
 214 CLASS="STRUCTNAME"
 215 >SDL_CDtrack</SPAN
 216 ></A
 217 >)</TD
 218 ></TR
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 220 ></TABLE
 221 ><P
 222 ></P
 223 ></DIV
 224 ></DIV
 225 ><DIV
 226 CLASS="REFSECT1"
 227 ><A
 228 NAME="AEN7604"
 229 ></A
 230 ><H2
 231 >Description</H2
 232 ><P
 233 >An <SPAN
 234 CLASS="STRUCTNAME"
 235 >SDL_CD</SPAN
 236 > structure is returned by <A
 237 HREF="sdlcdopen.html"
 238 ><TT
 239 CLASS="FUNCTION"
 240 >SDL_CDOpen</TT
 241 ></A
 242 >. It represents an opened CDROM device and stores information on the layout of the tracks on the disc.</P
 243 ><P
 244 >A frame is the base data unit of a CD. <TT
 245 CLASS="LITERAL"
 246 >CD_FPS</TT
 247 > frames is equal to 1 second of music. SDL provides two macros for converting between time and frames: <TT
 248 CLASS="LITERAL"
 249 >FRAMES_TO_MSF(f, M,S,F)</TT
 250 > and <TT
 251 CLASS="LITERAL"
 252 >MSF_TO_FRAMES</TT
 253 >.</P
 254 ></DIV
 255 ><DIV
 256 CLASS="REFSECT1"
 257 ><A
 258 NAME="AEN7614"
 259 ></A
 260 ><H2
 261 >Examples</H2
 262 ><PRE
 263 CLASS="PROGRAMLISTING"
 264 >int min, sec, frame;
 265 int frame_offset;
 266
 267 FRAMES_TO_MSF(cdrom-&#62;cur_frame, &#38;min, &#38;sec, &#38;frame);
 268 printf("Current Position: %d minutes, %d seconds, %d frames\n", min, sec, frame);
 269
 270 frame_offset=MSF_TO_FRAMES(min, sec, frame);</PRE
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 274 ><A
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 276 ></A
 277 ><H2
 278 >See Also</H2
 279 ><P
 280 ><A
 281 HREF="sdlcdopen.html"
 282 ><TT
 283 CLASS="FUNCTION"
 284 >SDL_CDOpen</TT
 285 ></A
 286 >,
 287 <A
 288 HREF="sdlcdtrack.html"
 289 ><SPAN
 290 CLASS="STRUCTNAME"
 291 >SDL_CDtrack</SPAN
 292 ></A
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