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view docs/html/cdrom.html @ 916:46916168361d
Date: Sun, 25 Jul 2004 23:10:03 +0800
From: Chris Taylor
Subject: SDL for Macintosh Programmer's Workshop: removed dynamic loading
I'm working on a game called D2X which uses SDL, and I recently ported
it to Mac OS 9. I used MPW to build it. It uses OpenGL. To get it to
work, I had to build SDL so it doesn't dynamically load OpenGL. This is
because I don't think MPW supports dynamic loading. The following patch
makes sure when SDL is built under MPW, dynamic loading of shared
libraries is disabled.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 25 Jul 2004 19:43:56 +0000 |
parents | 355632dca928 |
children |
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<HTML ><HEAD ><TITLE >CD-ROM</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="SDL Library Documentation" HREF="index.html"><LINK REL="UP" TITLE="SDL Reference" HREF="reference.html"><LINK REL="PREVIOUS" TITLE="SDL_CloseAudio" HREF="sdlcloseaudio.html"><LINK REL="NEXT" TITLE="SDL_CDNumDrives" HREF="sdlcdnumdrives.html"><META NAME="KEYWORD" CONTENT="cdrom"><META NAME="KEYWORD" CONTENT="function"></HEAD ><BODY CLASS="CHAPTER" BGCOLOR="#FFF8DC" TEXT="#000000" LINK="#0000ee" VLINK="#551a8b" ALINK="#ff0000" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >SDL Library Documentation</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="sdlcloseaudio.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="sdlcdnumdrives.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="CHAPTER" ><H1 ><A NAME="CDROM" ></A >Chapter 11. CD-ROM</H1 ><DIV CLASS="TOC" ><DL ><DT ><B >Table of Contents</B ></DT ><DT ><A HREF="sdlcdnumdrives.html" >SDL_CDNumDrives</A > -- Returns the number of CD-ROM drives on the system.</DT ><DT ><A HREF="sdlcdname.html" >SDL_CDName</A > -- Returns a human-readable, system-dependent identifier for the CD-ROM.</DT ><DT ><A HREF="sdlcdopen.html" >SDL_CDOpen</A > -- Opens a CD-ROM drive for access.</DT ><DT ><A HREF="sdlcdstatus.html" >SDL_CDStatus</A > -- Returns the current status of the given drive.</DT ><DT ><A HREF="sdlcdplay.html" >SDL_CDPlay</A > -- Play a CD</DT ><DT ><A HREF="sdlcdplaytracks.html" >SDL_CDPlayTracks</A > -- Play the given CD track(s)</DT ><DT ><A HREF="sdlcdpause.html" >SDL_CDPause</A > -- Pauses a CDROM</DT ><DT ><A HREF="sdlcdresume.html" >SDL_CDResume</A > -- Resumes a CDROM</DT ><DT ><A HREF="sdlcdstop.html" >SDL_CDStop</A > -- Stops a CDROM</DT ><DT ><A HREF="sdlcdeject.html" >SDL_CDEject</A > -- Ejects a CDROM</DT ><DT ><A HREF="sdlcdclose.html" >SDL_CDClose</A > -- Closes a SDL_CD handle</DT ><DT ><A HREF="sdlcd.html" >SDL_CD</A > -- CDROM Drive Information</DT ><DT ><A HREF="sdlcdtrack.html" >SDL_CDtrack</A > -- CD Track Information Structure</DT ></DL ></DIV ><P >SDL supports audio control of up to 32 local CD-ROM drives at once.</P ><P >You use this API to perform all the basic functions of a CD player, including listing the tracks, playing, stopping, and ejecting the CD-ROM. (Currently, multi-changer CD drives are not supported.)</P ><P >Before you call any of the SDL CD-ROM functions, you must first call "<TT CLASS="FUNCTION" >SDL_Init(SDL_INIT_CDROM)</TT >", which scans the system for CD-ROM drives, and sets the program up for audio control. Check the return code, which should be <SPAN CLASS="RETURNVALUE" >0</SPAN >, to see if there were any errors in starting up.</P ><P >After you have initialized the library, you can find out how many drives are available using the <TT CLASS="FUNCTION" >SDL_CDNumDrives()</TT > function. The first drive listed is the system default CD-ROM drive. After you have chosen a drive, and have opened it with <TT CLASS="FUNCTION" >SDL_CDOpen()</TT >, you can check the status and start playing if there's a CD in the drive.</P ><P >A CD-ROM is organized into one or more tracks, each consisting of a certain number of "frames". Each frame is ~2K in size, and at normal playing speed, a CD plays 75 frames per second. SDL works with the number of frames on a CD, but this can easily be converted to the more familiar minutes/seconds format by using the <TT CLASS="FUNCTION" >FRAMES_TO_MSF()</TT > macro.</P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="sdlcloseaudio.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="sdlcdnumdrives.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SDL_CloseAudio</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="reference.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >SDL_CDNumDrives</TD ></TR ></TABLE ></DIV ></BODY ></HTML >