Mercurial > sdl-ios-xcode
view src/video/Xext/extensions/xf86dga1.h @ 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 | 585a7e1285ae |
children | 782fd950bd46 c121d94672cb |
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/* $XFree86: xc/include/extensions/xf86dga1.h,v 1.2 1999/04/17 07:05:41 dawes Exp $ */ /* Copyright (c) 1995 Jon Tombs Copyright (c) 1995 XFree86 Inc */ /************************************************************************ THIS IS THE OLD DGA API AND IS OBSOLETE. PLEASE DO NOT USE IT ANYMORE ************************************************************************/ #ifndef _XF86DGA1_H_ #define _XF86DGA1_H_ #include <X11/Xfuncproto.h> #include "SDL_name.h" #define X_XF86DGAQueryVersion 0 #define X_XF86DGAGetVideoLL 1 #define X_XF86DGADirectVideo 2 #define X_XF86DGAGetViewPortSize 3 #define X_XF86DGASetViewPort 4 #define X_XF86DGAGetVidPage 5 #define X_XF86DGASetVidPage 6 #define X_XF86DGAInstallColormap 7 #define X_XF86DGAQueryDirectVideo 8 #define X_XF86DGAViewPortChanged 9 #define XF86DGADirectPresent 0x0001 #define XF86DGADirectGraphics 0x0002 #define XF86DGADirectMouse 0x0004 #define XF86DGADirectKeyb 0x0008 #define XF86DGAHasColormap 0x0100 #define XF86DGADirectColormap 0x0200 #ifndef _XF86DGA_SERVER_ _XFUNCPROTOBEGIN Bool SDL_NAME(XF86DGAQueryVersion)( #if NeedFunctionPrototypes Display* /* dpy */, int* /* majorVersion */, int* /* minorVersion */ #endif ); Bool SDL_NAME(XF86DGAQueryExtension)( #if NeedFunctionPrototypes Display* /* dpy */, int* /* event_base */, int* /* error_base */ #endif ); Status SDL_NAME(XF86DGAGetVideoLL)( #if NeedFunctionPrototypes Display* /* dpy */, int /* screen */, int * /* base addr */, int * /* width */, int * /* bank_size */, int * /* ram_size */ #endif ); Status SDL_NAME(XF86DGAGetVideo)( #if NeedFunctionPrototypes Display* /* dpy */, int /* screen */, char ** /* base addr */, int * /* width */, int * /* bank_size */, int * /* ram_size */ #endif ); Status SDL_NAME(XF86DGADirectVideo)( #if NeedFunctionPrototypes Display* /* dpy */, int /* screen */, int /* enable */ #endif ); Status SDL_NAME(XF86DGADirectVideoLL)( #if NeedFunctionPrototypes Display* /* dpy */, int /* screen */, int /* enable */ #endif ); Status SDL_NAME(XF86DGAGetViewPortSize)( #if NeedFunctionPrototypes Display* /* dpy */, int /* screen */, int * /* width */, int * /* height */ #endif ); Status SDL_NAME(XF86DGASetViewPort)( #if NeedFunctionPrototypes Display* /* dpy */, int /* screen */, int x /* X */, int y /* Y */ #endif ); Status SDL_NAME(XF86DGAGetVidPage)( #if NeedFunctionPrototypes Display* /* dpy */, int /* screen */, int * /* vid page */ #endif ); Status SDL_NAME(XF86DGASetVidPage)( #if NeedFunctionPrototypes Display* /* dpy */, int /* screen */, int /* vid page */ #endif ); Status SDL_NAME(XF86DGAInstallColormap)( #if NeedFunctionPrototypes Display* /* dpy */, int /* screen */, Colormap /*Colormap */ #endif ); int SDL_NAME(XF86DGAForkApp)( #if NeedFunctionPrototypes int screen #endif ); Status SDL_NAME(XF86DGAQueryDirectVideo)( #if NeedFunctionPrototypes Display * /* dpy */, int /* screen */, int * /* flags */ #endif ); Bool SDL_NAME(XF86DGAViewPortChanged)( #if NeedFunctionPrototypes Display * /* dpy */, int /* screen */, int /* n */ #endif ); _XFUNCPROTOEND #endif /* _XF86DGA_SERVER_ */ #endif /* _XF86DGA1_H_ */