Mercurial > sdl-ios-xcode
annotate docs/html/cdrom.html @ 3846:66fb40445587 SDL-ryan-multiple-audio-device
Removed distinction between "available" and "init" in audio backends, since
both had to be checked for success as a pair at the higher level and several
of the Available methods were just always-succeed placeholders anyhow. Now
the availability check is done in the init code, and the higher level tries
all possible drivers until one manages to initialize successfully.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Tue, 17 Oct 2006 09:09:21 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
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| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >CD-ROM</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ |
| 0 | 8 "><LINK |
| 9 REL="HOME" | |
| 10 TITLE="SDL Library Documentation" | |
| 11 HREF="index.html"><LINK | |
| 12 REL="UP" | |
| 13 TITLE="SDL Reference" | |
| 14 HREF="reference.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_CloseAudio" | |
| 17 HREF="sdlcloseaudio.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_CDNumDrives" | |
| 20 HREF="sdlcdnumdrives.html"><META | |
| 21 NAME="KEYWORD" | |
| 22 CONTENT="cdrom"><META | |
| 23 NAME="KEYWORD" | |
| 24 CONTENT="function"></HEAD | |
| 25 ><BODY | |
| 26 CLASS="CHAPTER" | |
| 27 BGCOLOR="#FFF8DC" | |
| 28 TEXT="#000000" | |
| 29 LINK="#0000ee" | |
| 30 VLINK="#551a8b" | |
| 31 ALINK="#ff0000" | |
| 32 ><DIV | |
| 33 CLASS="NAVHEADER" | |
| 34 ><TABLE | |
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35 SUMMARY="Header navigation table" |
| 0 | 36 WIDTH="100%" |
| 37 BORDER="0" | |
| 38 CELLPADDING="0" | |
| 39 CELLSPACING="0" | |
| 40 ><TR | |
| 41 ><TH | |
| 42 COLSPAN="3" | |
| 43 ALIGN="center" | |
| 44 >SDL Library Documentation</TH | |
| 45 ></TR | |
| 46 ><TR | |
| 47 ><TD | |
| 48 WIDTH="10%" | |
| 49 ALIGN="left" | |
| 50 VALIGN="bottom" | |
| 51 ><A | |
| 52 HREF="sdlcloseaudio.html" | |
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53 ACCESSKEY="P" |
| 0 | 54 >Prev</A |
| 55 ></TD | |
| 56 ><TD | |
| 57 WIDTH="80%" | |
| 58 ALIGN="center" | |
| 59 VALIGN="bottom" | |
| 60 ></TD | |
| 61 ><TD | |
| 62 WIDTH="10%" | |
| 63 ALIGN="right" | |
| 64 VALIGN="bottom" | |
| 65 ><A | |
| 66 HREF="sdlcdnumdrives.html" | |
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67 ACCESSKEY="N" |
| 0 | 68 >Next</A |
| 69 ></TD | |
| 70 ></TR | |
| 71 ></TABLE | |
| 72 ><HR | |
| 73 ALIGN="LEFT" | |
| 74 WIDTH="100%"></DIV | |
| 75 ><DIV | |
| 76 CLASS="CHAPTER" | |
| 77 ><H1 | |
| 78 ><A | |
| 79 NAME="CDROM" | |
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80 ></A |
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81 >Chapter 11. CD-ROM</H1 |
| 0 | 82 ><DIV |
| 83 CLASS="TOC" | |
| 84 ><DL | |
| 85 ><DT | |
| 86 ><B | |
| 87 >Table of Contents</B | |
| 88 ></DT | |
| 89 ><DT | |
| 90 ><A | |
| 91 HREF="sdlcdnumdrives.html" | |
| 92 >SDL_CDNumDrives</A | |
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93 > -- Returns the number of CD-ROM drives on the system.</DT |
| 0 | 94 ><DT |
| 95 ><A | |
| 96 HREF="sdlcdname.html" | |
| 97 >SDL_CDName</A | |
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98 > -- Returns a human-readable, system-dependent identifier for the CD-ROM.</DT |
| 0 | 99 ><DT |
| 100 ><A | |
| 101 HREF="sdlcdopen.html" | |
| 102 >SDL_CDOpen</A | |
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103 > -- Opens a CD-ROM drive for access.</DT |
| 0 | 104 ><DT |
| 105 ><A | |
| 106 HREF="sdlcdstatus.html" | |
| 107 >SDL_CDStatus</A | |
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108 > -- Returns the current status of the given drive.</DT |
| 0 | 109 ><DT |
| 110 ><A | |
| 111 HREF="sdlcdplay.html" | |
| 112 >SDL_CDPlay</A | |
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113 > -- Play a CD</DT |
| 0 | 114 ><DT |
| 115 ><A | |
| 116 HREF="sdlcdplaytracks.html" | |
| 117 >SDL_CDPlayTracks</A | |
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118 > -- Play the given CD track(s)</DT |
| 0 | 119 ><DT |
| 120 ><A | |
| 121 HREF="sdlcdpause.html" | |
| 122 >SDL_CDPause</A | |
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123 > -- Pauses a CDROM</DT |
| 0 | 124 ><DT |
| 125 ><A | |
| 126 HREF="sdlcdresume.html" | |
| 127 >SDL_CDResume</A | |
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128 > -- Resumes a CDROM</DT |
| 0 | 129 ><DT |
| 130 ><A | |
| 131 HREF="sdlcdstop.html" | |
| 132 >SDL_CDStop</A | |
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133 > -- Stops a CDROM</DT |
| 0 | 134 ><DT |
| 135 ><A | |
| 136 HREF="sdlcdeject.html" | |
| 137 >SDL_CDEject</A | |
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138 > -- Ejects a CDROM</DT |
| 0 | 139 ><DT |
| 140 ><A | |
| 141 HREF="sdlcdclose.html" | |
| 142 >SDL_CDClose</A | |
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143 > -- Closes a SDL_CD handle</DT |
| 0 | 144 ><DT |
| 145 ><A | |
| 146 HREF="sdlcd.html" | |
| 147 >SDL_CD</A | |
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148 > -- CDROM Drive Information</DT |
| 0 | 149 ><DT |
| 150 ><A | |
| 151 HREF="sdlcdtrack.html" | |
| 152 >SDL_CDtrack</A | |
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153 > -- CD Track Information Structure</DT |
| 0 | 154 ></DL |
| 155 ></DIV | |
| 156 ><P | |
| 157 >SDL supports audio control of up to 32 local CD-ROM drives at once.</P | |
| 158 ><P | |
| 159 >You use this API to perform all the basic functions of a CD player, | |
| 160 including listing the tracks, playing, stopping, and ejecting the CD-ROM. | |
| 161 (Currently, multi-changer CD drives are not supported.)</P | |
| 162 ><P | |
| 163 >Before you call any of the SDL CD-ROM functions, you must first call | |
| 164 "<TT | |
| 165 CLASS="FUNCTION" | |
| 166 >SDL_Init(SDL_INIT_CDROM)</TT | |
| 167 >", which scans the system for | |
| 168 CD-ROM drives, and sets the program up for audio control. Check the | |
| 169 return code, which should be <SPAN | |
| 170 CLASS="RETURNVALUE" | |
| 171 >0</SPAN | |
| 172 >, to see if there | |
| 173 were any errors in starting up.</P | |
| 174 ><P | |
| 175 >After you have initialized the library, you can find out how many drives | |
| 176 are available using the <TT | |
| 177 CLASS="FUNCTION" | |
| 178 >SDL_CDNumDrives()</TT | |
| 179 > function. | |
| 180 The first drive listed is the system default CD-ROM drive. After you have | |
| 181 chosen a drive, and have opened it with <TT | |
| 182 CLASS="FUNCTION" | |
| 183 >SDL_CDOpen()</TT | |
| 184 >, | |
| 185 you can check the status and start playing if there's a CD in the drive.</P | |
| 186 ><P | |
| 187 >A CD-ROM is organized into one or more tracks, each consisting of a certain | |
| 188 number of "frames". Each frame is ~2K in size, and at normal playing speed, | |
| 189 a CD plays 75 frames per second. SDL works with the number of frames on a | |
| 190 CD, but this can easily be converted to the more familiar minutes/seconds | |
| 191 format by using the <TT | |
| 192 CLASS="FUNCTION" | |
| 193 >FRAMES_TO_MSF()</TT | |
| 194 > macro.</P | |
| 195 ></DIV | |
| 196 ><DIV | |
| 197 CLASS="NAVFOOTER" | |
| 198 ><HR | |
| 199 ALIGN="LEFT" | |
| 200 WIDTH="100%"><TABLE | |
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201 SUMMARY="Footer navigation table" |
| 0 | 202 WIDTH="100%" |
| 203 BORDER="0" | |
| 204 CELLPADDING="0" | |
| 205 CELLSPACING="0" | |
| 206 ><TR | |
| 207 ><TD | |
| 208 WIDTH="33%" | |
| 209 ALIGN="left" | |
| 210 VALIGN="top" | |
| 211 ><A | |
| 212 HREF="sdlcloseaudio.html" | |
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213 ACCESSKEY="P" |
| 0 | 214 >Prev</A |
| 215 ></TD | |
| 216 ><TD | |
| 217 WIDTH="34%" | |
| 218 ALIGN="center" | |
| 219 VALIGN="top" | |
| 220 ><A | |
| 221 HREF="index.html" | |
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222 ACCESSKEY="H" |
| 0 | 223 >Home</A |
| 224 ></TD | |
| 225 ><TD | |
| 226 WIDTH="33%" | |
| 227 ALIGN="right" | |
| 228 VALIGN="top" | |
| 229 ><A | |
| 230 HREF="sdlcdnumdrives.html" | |
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231 ACCESSKEY="N" |
| 0 | 232 >Next</A |
| 233 ></TD | |
| 234 ></TR | |
| 235 ><TR | |
| 236 ><TD | |
| 237 WIDTH="33%" | |
| 238 ALIGN="left" | |
| 239 VALIGN="top" | |
| 240 >SDL_CloseAudio</TD | |
| 241 ><TD | |
| 242 WIDTH="34%" | |
| 243 ALIGN="center" | |
| 244 VALIGN="top" | |
| 245 ><A | |
| 246 HREF="reference.html" | |
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247 ACCESSKEY="U" |
| 0 | 248 >Up</A |
| 249 ></TD | |
| 250 ><TD | |
| 251 WIDTH="33%" | |
| 252 ALIGN="right" | |
| 253 VALIGN="top" | |
| 254 >SDL_CDNumDrives</TD | |
| 255 ></TR | |
| 256 ></TABLE | |
| 257 ></DIV | |
| 258 ></BODY | |
| 259 ></HTML | |
| 260 > |