Mercurial > sdl-ios-xcode
view docs/html/sdlsyswmevent.html @ 3880:74e828c64315 SDL-1.2
Fixed bug #292
I might be on crack here.
It looks like SDL_ConvertMono() in src/audio/SDL_audiocvt.c adds the left and
right channels of a stereo stream together, and clamps the new mono channel if
it would overflow.
Shouldn't it be dividing by 2 to average the two sample points instead of
clamping? Otherwise the mono sample point's volume doubles in the conversion.
This would also make the conversion faster, as it replaces two branches per
sample frame with a bitwise shift.
--ryan.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 24 Sep 2006 15:45:37 +0000 |
parents | 355632dca928 |
children |
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<HTML ><HEAD ><TITLE >SDL_SysWMEvent</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 Event Structures." HREF="eventstructures.html"><LINK REL="PREVIOUS" TITLE="SDL_ExposeEvent" HREF="sdlexposeevent.html"><LINK REL="NEXT" TITLE="SDL_UserEvent" HREF="sdluserevent.html"></HEAD ><BODY CLASS="REFENTRY" 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="sdlexposeevent.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="sdluserevent.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SDLSYSWMEVENT" ></A >SDL_SysWMEvent</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN4538" ></A ><H2 >Name</H2 >SDL_SysWMEvent -- Platform-dependent window manager event.</DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN4541" ></A ><H2 >Description</H2 ><P >The system window manager event contains a pointer to system-specific information about unknown window manager events. If you enable this event using <A HREF="sdleventstate.html" ><TT CLASS="FUNCTION" >SDL_EventState()</TT ></A >, it will be generated whenever unhandled events are received from the window manager. This can be used, for example, to implement cut-and-paste in your application. <PRE CLASS="PROGRAMLISTING" >typedef struct { Uint8 type; /* Always SDL_SYSWMEVENT */ SDL_SysWMmsg *msg; } SDL_SysWMEvent;</PRE > If you want to obtain system-specific information about the window manager, you can fill the version member of a <SPAN CLASS="STRUCTNAME" >SDL_SysWMinfo</SPAN > structure (details can be found in <TT CLASS="FILENAME" >SDL_syswm.h</TT >, which must be included) using the <TT CLASS="FUNCTION" >SDL_VERSION()</TT > macro found in <TT CLASS="FILENAME" >SDL_version.h</TT >, and pass it to the function: <DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN4551" ></A ><P ></P ><P ><CODE ><CODE CLASS="FUNCDEF" >int <B CLASS="FSFUNC" >SDL_GetWMInfo</B ></CODE >(SDL_SysWMinfo *info);</CODE ></P ><P ></P ></DIV ></P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN4556" ></A ><H2 >See Also</H2 ><P ><A HREF="sdleventstate.html" ><TT CLASS="FUNCTION" >SDL_EventState</TT ></A ></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="sdlexposeevent.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="sdluserevent.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SDL_ExposeEvent</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="eventstructures.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >SDL_UserEvent</TD ></TR ></TABLE ></DIV ></BODY ></HTML >