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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 15:56:36 +0000
parents 355632dca928
children
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>SDL_mutexP</H1
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><H2
>Name</H2
>SDL_mutexP&nbsp;--&nbsp;Lock a mutex</DIV
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>Synopsis</H2
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><P
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><PRE
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>#include "SDL.h"
#include "SDL_thread.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int <B
CLASS="FSFUNC"
>SDL_mutexP</B
></CODE
>(SDL_mutex *mutex);</CODE
></P
><P
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><H2
>Description</H2
><P
>Locks the <TT
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><I
>mutex</I
></TT
>, which was previously created with <A
HREF="sdlcreatemutex.html"
><TT
CLASS="FUNCTION"
>SDL_CreateMutex</TT
></A
>. If the mutex is already locked then <TT
CLASS="FUNCTION"
>SDL_mutexP</TT
> will not return until it is <A
HREF="sdlmutexv.html"
>unlocked</A
>. Returns <SPAN
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>0</SPAN
> on success, or <SPAN
CLASS="RETURNVALUE"
>-1</SPAN
> on an error.</P
><P
>SDL also defines a macro <TT
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>#define SDL_LockMutex(m) SDL_mutexP(m)</TT
>.</P
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><TT
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>SDL_CreateMutex</TT
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