252 lines
4.3 KiB
HTML
252 lines
4.3 KiB
HTML
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<HTML
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><HEAD
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><TITLE
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>CD-ROM</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.64
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"><LINK
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REL="HOME"
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TITLE="SDL Library Documentation"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="SDL Reference"
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HREF="reference.html"><LINK
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REL="PREVIOUS"
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TITLE="SDL_CloseAudio"
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HREF="sdlcloseaudio.html"><LINK
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REL="NEXT"
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TITLE="SDL_CDNumDrives"
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HREF="sdlcdnumdrives.html"><META
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NAME="KEYWORD"
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CONTENT="cdrom"><META
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NAME="KEYWORD"
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CONTENT="function"></HEAD
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><BODY
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CLASS="CHAPTER"
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BGCOLOR="#FFF8DC"
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TEXT="#000000"
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LINK="#0000ee"
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VLINK="#551a8b"
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ALINK="#ff0000"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>SDL Library Documentation</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="sdlcloseaudio.html"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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></TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="sdlcdnumdrives.html"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="CHAPTER"
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><H1
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><A
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NAME="CDROM"
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>Chapter 11. CD-ROM</A
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></H1
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><DIV
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CLASS="TOC"
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><DL
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><DT
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><B
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>Table of Contents</B
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></DT
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><DT
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><A
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HREF="sdlcdnumdrives.html"
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>SDL_CDNumDrives</A
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> — Returns the number of CD-ROM drives on the system.</DT
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><DT
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><A
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HREF="sdlcdname.html"
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>SDL_CDName</A
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> — Returns a human-readable, system-dependent identifier for the CD-ROM.</DT
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><DT
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><A
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HREF="sdlcdopen.html"
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>SDL_CDOpen</A
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> — Opens a CD-ROM drive for access.</DT
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><DT
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><A
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HREF="sdlcdstatus.html"
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>SDL_CDStatus</A
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> — Returns the current status of the given drive.</DT
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><DT
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><A
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HREF="sdlcdplay.html"
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>SDL_CDPlay</A
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> — Play a CD</DT
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><DT
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><A
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HREF="sdlcdplaytracks.html"
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>SDL_CDPlayTracks</A
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> — Play the given CD track(s)</DT
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><DT
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><A
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HREF="sdlcdpause.html"
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>SDL_CDPause</A
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> — Pauses a CDROM</DT
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><DT
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><A
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HREF="sdlcdresume.html"
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>SDL_CDResume</A
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> — Resumes a CDROM</DT
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><DT
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><A
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HREF="sdlcdstop.html"
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>SDL_CDStop</A
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> — Stops a CDROM</DT
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><DT
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><A
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HREF="sdlcdeject.html"
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>SDL_CDEject</A
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> — Ejects a CDROM</DT
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><DT
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><A
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HREF="sdlcdclose.html"
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>SDL_CDClose</A
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> — Closes a SDL_CD handle</DT
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><DT
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><A
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HREF="sdlcd.html"
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>SDL_CD</A
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> — CDROM Drive Information</DT
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><DT
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><A
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HREF="sdlcdtrack.html"
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>SDL_CDtrack</A
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> — CD Track Information Structure</DT
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></DL
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></DIV
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><P
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>SDL supports audio control of up to 32 local CD-ROM drives at once.</P
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><P
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>You use this API to perform all the basic functions of a CD player,
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including listing the tracks, playing, stopping, and ejecting the CD-ROM.
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(Currently, multi-changer CD drives are not supported.)</P
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><P
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>Before you call any of the SDL CD-ROM functions, you must first call
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"<TT
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CLASS="FUNCTION"
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>SDL_Init(SDL_INIT_CDROM)</TT
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>", which scans the system for
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CD-ROM drives, and sets the program up for audio control. Check the
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return code, which should be <SPAN
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CLASS="RETURNVALUE"
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>0</SPAN
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>, to see if there
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were any errors in starting up.</P
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><P
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>After you have initialized the library, you can find out how many drives
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are available using the <TT
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CLASS="FUNCTION"
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>SDL_CDNumDrives()</TT
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> function.
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The first drive listed is the system default CD-ROM drive. After you have
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chosen a drive, and have opened it with <TT
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CLASS="FUNCTION"
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>SDL_CDOpen()</TT
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>,
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you can check the status and start playing if there's a CD in the drive.</P
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><P
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>A CD-ROM is organized into one or more tracks, each consisting of a certain
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number of "frames". Each frame is ~2K in size, and at normal playing speed,
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a CD plays 75 frames per second. SDL works with the number of frames on a
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CD, but this can easily be converted to the more familiar minutes/seconds
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format by using the <TT
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CLASS="FUNCTION"
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>FRAMES_TO_MSF()</TT
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> macro.</P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="sdlcloseaudio.html"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.html"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="sdlcdnumdrives.html"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>SDL_CloseAudio</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="reference.html"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>SDL_CDNumDrives</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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>
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