📄 sdlcd.html

📁 VC5.6.7的一个扩展库。跟DirectX的功能差不多。
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<HTML><HEAD><TITLE>SDL_CD</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_CDClose"HREF="sdlcdclose.html"><LINKREL="NEXT"TITLE="SDL_CDtrack"HREF="sdlcdtrack.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="sdlcdclose.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom"></TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="sdlcdtrack.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><H1><ANAME="SDLCD"></A>SDL_CD</H1><DIVCLASS="REFNAMEDIV"><ANAME="AEN7566"></A><H2>Name</H2>SDL_CD&nbsp;--&nbsp;CDROM Drive Information</DIV><DIVCLASS="REFSECT1"><ANAME="AEN7569"></A><H2>Structure Definition</H2><PRECLASS="PROGRAMLISTING">typedef struct{  int id;  CDstatus status;  int numtracks;  int cur_track;  int cur_frame;  SDL_CDtrack track[SDL_MAX_TRACKS+1];} SDL_CD;</PRE></DIV><DIVCLASS="REFSECT1"><ANAME="AEN7572"></A><H2>Structure Data</H2><DIVCLASS="INFORMALTABLE"><ANAME="AEN7574"></A><P></P><TABLEBORDER="0"CLASS="CALSTABLE"><TBODY><TR><TDALIGN="LEFT"VALIGN="TOP"><TTCLASS="STRUCTFIELD"><I>id</I></TT></TD><TDALIGN="LEFT"VALIGN="TOP">Private drive identifier</TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"><TTCLASS="STRUCTFIELD"><I>status</I></TT></TD><TDALIGN="LEFT"VALIGN="TOP">Drive <AHREF="sdlcdstatus.html">status</A></TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"><TTCLASS="STRUCTFIELD"><I>numtracks</I></TT></TD><TDALIGN="LEFT"VALIGN="TOP">Number of tracks on the CD</TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"><TTCLASS="STRUCTFIELD"><I>cur_track</I></TT></TD><TDALIGN="LEFT"VALIGN="TOP">Current track</TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"><TTCLASS="STRUCTFIELD"><I>cur_frame</I></TT></TD><TDALIGN="LEFT"VALIGN="TOP">Current frame offset within the track</TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"><TTCLASS="STRUCTFIELD"><I>track</I></TT>[SDL_MAX_TRACKS+1]</TD><TDALIGN="LEFT"VALIGN="TOP">Array of track descriptions. (see <AHREF="sdlcdtrack.html"><SPANCLASS="STRUCTNAME">SDL_CDtrack</SPAN></A>)</TD></TR></TBODY></TABLE><P></P></DIV></DIV><DIVCLASS="REFSECT1"><ANAME="AEN7604"></A><H2>Description</H2><P>An <SPANCLASS="STRUCTNAME">SDL_CD</SPAN> structure is returned by <AHREF="sdlcdopen.html"><TTCLASS="FUNCTION">SDL_CDOpen</TT></A>. It represents an opened CDROM device and stores information on the layout of the tracks on the disc.</P><P>A frame is the base data unit of a CD. <TTCLASS="LITERAL">CD_FPS</TT> frames is equal to 1 second of music. SDL provides two macros for converting between time and frames: <TTCLASS="LITERAL">FRAMES_TO_MSF(f, M,S,F)</TT> and <TTCLASS="LITERAL">MSF_TO_FRAMES</TT>.</P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN7614"></A><H2>Examples</H2><PRECLASS="PROGRAMLISTING">int min, sec, frame;int frame_offset;FRAMES_TO_MSF(cdrom-&#62;cur_frame, &#38;min, &#38;sec, &#38;frame);printf("Current Position: %d minutes, %d seconds, %d frames\n", min, sec, frame);frame_offset=MSF_TO_FRAMES(min, sec, frame);</PRE></DIV><DIVCLASS="REFSECT1"><ANAME="AEN7617"></A><H2>See Also</H2><P><AHREF="sdlcdopen.html"><TTCLASS="FUNCTION">SDL_CDOpen</TT></A>,<AHREF="sdlcdtrack.html"><SPANCLASS="STRUCTNAME">SDL_CDtrack</SPAN></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="sdlcdclose.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="sdlcdtrack.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">SDL_CDClose</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="cdrom.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">SDL_CDtrack</TD></TR></TABLE></DIV></BODY></HTML>
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