e14743d1 |
1 | <HTML |
2 | ><HEAD |
3 | ><TITLE |
4 | >SDL_CD</TITLE |
5 | ><META |
6 | NAME="GENERATOR" |
7 | CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ |
8 | "><LINK |
9 | REL="HOME" |
10 | TITLE="SDL Library Documentation" |
11 | HREF="index.html"><LINK |
12 | REL="UP" |
13 | TITLE="CD-ROM" |
14 | HREF="cdrom.html"><LINK |
15 | REL="PREVIOUS" |
16 | TITLE="SDL_CDClose" |
17 | HREF="sdlcdclose.html"><LINK |
18 | REL="NEXT" |
19 | TITLE="SDL_CDtrack" |
20 | HREF="sdlcdtrack.html"></HEAD |
21 | ><BODY |
22 | CLASS="REFENTRY" |
23 | BGCOLOR="#FFF8DC" |
24 | TEXT="#000000" |
25 | LINK="#0000ee" |
26 | VLINK="#551a8b" |
27 | ALINK="#ff0000" |
28 | ><DIV |
29 | CLASS="NAVHEADER" |
30 | ><TABLE |
31 | SUMMARY="Header navigation table" |
32 | WIDTH="100%" |
33 | BORDER="0" |
34 | CELLPADDING="0" |
35 | CELLSPACING="0" |
36 | ><TR |
37 | ><TH |
38 | COLSPAN="3" |
39 | ALIGN="center" |
40 | >SDL Library Documentation</TH |
41 | ></TR |
42 | ><TR |
43 | ><TD |
44 | WIDTH="10%" |
45 | ALIGN="left" |
46 | VALIGN="bottom" |
47 | ><A |
48 | HREF="sdlcdclose.html" |
49 | ACCESSKEY="P" |
50 | >Prev</A |
51 | ></TD |
52 | ><TD |
53 | WIDTH="80%" |
54 | ALIGN="center" |
55 | VALIGN="bottom" |
56 | ></TD |
57 | ><TD |
58 | WIDTH="10%" |
59 | ALIGN="right" |
60 | VALIGN="bottom" |
61 | ><A |
62 | HREF="sdlcdtrack.html" |
63 | ACCESSKEY="N" |
64 | >Next</A |
65 | ></TD |
66 | ></TR |
67 | ></TABLE |
68 | ><HR |
69 | ALIGN="LEFT" |
70 | WIDTH="100%"></DIV |
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 -- 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" |
118 | CLASS="CALSTABLE" |
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 |
219 | ></TBODY |
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->cur_frame, &min, &sec, &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 |
271 | ></DIV |
272 | ><DIV |
273 | CLASS="REFSECT1" |
274 | ><A |
275 | NAME="AEN7617" |
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 |
293 | ></P |
294 | ></DIV |
295 | ><DIV |
296 | CLASS="NAVFOOTER" |
297 | ><HR |
298 | ALIGN="LEFT" |
299 | WIDTH="100%"><TABLE |
300 | SUMMARY="Footer navigation table" |
301 | WIDTH="100%" |
302 | BORDER="0" |
303 | CELLPADDING="0" |
304 | CELLSPACING="0" |
305 | ><TR |
306 | ><TD |
307 | WIDTH="33%" |
308 | ALIGN="left" |
309 | VALIGN="top" |
310 | ><A |
311 | HREF="sdlcdclose.html" |
312 | ACCESSKEY="P" |
313 | >Prev</A |
314 | ></TD |
315 | ><TD |
316 | WIDTH="34%" |
317 | ALIGN="center" |
318 | VALIGN="top" |
319 | ><A |
320 | HREF="index.html" |
321 | ACCESSKEY="H" |
322 | >Home</A |
323 | ></TD |
324 | ><TD |
325 | WIDTH="33%" |
326 | ALIGN="right" |
327 | VALIGN="top" |
328 | ><A |
329 | HREF="sdlcdtrack.html" |
330 | ACCESSKEY="N" |
331 | >Next</A |
332 | ></TD |
333 | ></TR |
334 | ><TR |
335 | ><TD |
336 | WIDTH="33%" |
337 | ALIGN="left" |
338 | VALIGN="top" |
339 | >SDL_CDClose</TD |
340 | ><TD |
341 | WIDTH="34%" |
342 | ALIGN="center" |
343 | VALIGN="top" |
344 | ><A |
345 | HREF="cdrom.html" |
346 | ACCESSKEY="U" |
347 | >Up</A |
348 | ></TD |
349 | ><TD |
350 | WIDTH="33%" |
351 | ALIGN="right" |
352 | VALIGN="top" |
353 | >SDL_CDtrack</TD |
354 | ></TR |
355 | ></TABLE |
356 | ></DIV |
357 | ></BODY |
358 | ></HTML |
359 | > |