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<HTML><HEAD><TITLE>SDL_CDOpen</TITLE><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+"><LINKREL="HOME"TITLE="SDL Library Documentation"HREF="index.html"><LINKREL="UP"TITLE="CD-ROM"HREF="cdrom.html"><LINKREL="PREVIOUS"TITLE="SDL_CDName"HREF="sdlcdname.html"><LINKREL="NEXT"TITLE="SDL_CDStatus"HREF="sdlcdstatus.html"></HEAD><BODYCLASS="REFENTRY"BGCOLOR="#FFF8DC"TEXT="#000000"LINK="#0000ee"VLINK="#551a8b"ALINK="#ff0000"><DIVCLASS="NAVHEADER"><TABLESUMMARY="Header navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">SDL Library Documentation</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="sdlcdname.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom"></TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="sdlcdstatus.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><H1><ANAME="SDLCDOPEN"></A>SDL_CDOpen</H1><DIVCLASS="REFNAMEDIV"><ANAME="AEN7274"></A><H2>Name</H2>SDL_CDOpen -- Opens a CD-ROM drive for access.</DIV><DIVCLASS="REFSYNOPSISDIV"><ANAME="AEN7277"></A><H2>Synopsis</H2><DIVCLASS="FUNCSYNOPSIS"><ANAME="AEN7278"></A><P></P><PRECLASS="FUNCSYNOPSISINFO">#include "SDL.h"</PRE><P><CODE><CODECLASS="FUNCDEF">SDL_CD *<BCLASS="FSFUNC">SDL_CDOpen</B></CODE>(int drive);</CODE></P><P></P></DIV></DIV><DIVCLASS="REFSECT1"><ANAME="AEN7284"></A><H2>Description</H2><P>Opens a CD-ROM drive for access. It returns a <AHREF="sdlcd.html"><SPANCLASS="STRUCTNAME">SDL_CD</SPAN></A> structure on success, or <TTCLASS="LITERAL">NULL</TT> if the drive was invalid or busy. This newly opened CD-ROM becomes the default CD used when other CD functions are passed a <TTCLASS="LITERAL">NULL</TT> CD-ROM handle. </P><P>Drives are numbered starting with 0. Drive 0 is the system default CD-ROM.</P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN7292"></A><H2>Examples</H2><PRECLASS="PROGRAMLISTING">SDL_CD *cdrom;int cur_track;int min, sec, frame;SDL_Init(SDL_INIT_CDROM);atexit(SDL_Quit);/* Check for CD drives */if(!SDL_CDNumDrives()){ /* None found */ fprintf(stderr, "No CDROM devices available\n"); exit(-1);}/* Open the default drive */cdrom=SDL_CDOpen(0);/* Did if open? Check if cdrom is NULL */if(!cdrom){ fprintf(stderr, "Couldn't open drive: %s\n", SDL_GetError()); exit(-1);}/* Print Volume info */printf("Name: %s\n", SDL_CDName(0));printf("Tracks: %d\n", cdrom->numtracks);for(cur_track=0;cur_track < cdrom->numtracks; cur_track++){ FRAMES_TO_MSF(cdrom->track[cur_track].length, &min, &sec, &frame); printf("\tTrack %d: Length %d:%d\n", cur_track, min, sec);}SDL_CDClose(cdrom);</PRE></DIV><DIVCLASS="REFSECT1"><ANAME="AEN7295"></A><H2>See Also</H2><P><AHREF="sdlcd.html"><SPANCLASS="STRUCTNAME">SDL_CD</SPAN></A>,<AHREF="sdlcdtrack.html"><SPANCLASS="STRUCTNAME">SDL_CDtrack</SPAN></A>,<AHREF="sdlcdclose.html"><TTCLASS="FUNCTION">SDL_CDClose</TT></A></P></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLESUMMARY="Footer navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="sdlcdname.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="index.html"ACCESSKEY="H">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="sdlcdstatus.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">SDL_CDName</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="cdrom.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">SDL_CDStatus</TD></TR></TABLE></DIV></BODY></HTML>⌨️ 快捷键说明
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