Mercurial > sdl-ios-xcode
view src/audio/windx5/directx.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 | bb6839704ed6 |
children | 782fd950bd46 eada7e321df6 |
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#ifndef _directx_h #define _directx_h /* Include all of the DirectX 5.0 headers and adds any necessary tweaks */ #define WIN32_LEAN_AND_MEAN #include <windows.h> #include <mmsystem.h> #ifndef WIN32 #define WIN32 #endif #undef WINNT /* Far pointers don't exist in 32-bit code */ #ifndef FAR #define FAR #endif /* Error codes not yet included in Win32 API header files */ #ifndef MAKE_HRESULT #define MAKE_HRESULT(sev,fac,code) \ ((HRESULT)(((unsigned long)(sev)<<31) | ((unsigned long)(fac)<<16) | ((unsigned long)(code)))) #endif #ifndef S_OK #define S_OK (HRESULT)0x00000000L #endif #ifndef SUCCEEDED #define SUCCEEDED(x) ((HRESULT)(x) >= 0) #endif #ifndef FAILED #define FAILED(x) ((HRESULT)(x)<0) #endif #ifndef E_FAIL #define E_FAIL (HRESULT)0x80000008L #endif #ifndef E_NOINTERFACE #define E_NOINTERFACE (HRESULT)0x80004002L #endif #ifndef E_OUTOFMEMORY #define E_OUTOFMEMORY (HRESULT)0x8007000EL #endif #ifndef E_INVALIDARG #define E_INVALIDARG (HRESULT)0x80070057L #endif #ifndef E_NOTIMPL #define E_NOTIMPL (HRESULT)0x80004001L #endif #ifndef REGDB_E_CLASSNOTREG #define REGDB_E_CLASSNOTREG (HRESULT)0x80040154L #endif /* Severity codes */ #ifndef SEVERITY_ERROR #define SEVERITY_ERROR 1 #endif /* Error facility codes */ #ifndef FACILITY_WIN32 #define FACILITY_WIN32 7 #endif #ifndef FIELD_OFFSET #define FIELD_OFFSET(type, field) ((LONG)&(((type *)0)->field)) #endif /* DirectX headers (if it isn't included, I haven't tested it yet) */ /* We need these defines to mark what version of DirectX API we use */ #define DIRECTDRAW_VERSION 0x0700 #define DIRECTSOUND_VERSION 0x0500 #define DIRECTINPUT_VERSION 0x0500 #ifdef __GNUC__ #define NONAMELESSUNION #endif #include <ddraw.h> #include <dsound.h> #include <dinput.h> #endif /* _directx_h */