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audio: fix integer overflow expression 

Fix an integer overflow that can happen for signed 32 bit types
when using FLOAT_MIXENG. (Note that at the moment this is only true
when using the MacOSX coreaudio audio driver.)

Signed-off-by: Juha Riihim?ki <juha.riihimaki@nokia.com>
[Peter Maydell: Removed unnecessary casts]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: malc <av1474@comtv.ru>
This commit is contained in:
Juha Riihim?ki 2011-05-31 19:40:21 +01:00 committed by malc
parent b1d7d2b93a
commit 578c7b2ca8
1 changed files with 2 additions and 2 deletions
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4
audio/mixeng_template.h
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@ -46,7 +46,7 @@ static mixeng_real inline glue (conv_, ET) (IN_T v)
#endif
#else /* !RECIPROCAL */
#ifdef SIGNED
return nv / (mixeng_real) (IN_MAX - IN_MIN);
return nv / (mixeng_real) ((mixeng_real) IN_MAX - IN_MIN);
#else
return (nv - HALF) / (mixeng_real) IN_MAX;
#endif
@ -63,7 +63,7 @@ static IN_T inline glue (clip_, ET) (mixeng_real v)
}
#ifdef SIGNED
return ENDIAN_CONVERT ((IN_T) (v * (IN_MAX - IN_MIN)));
return ENDIAN_CONVERT ((IN_T) (v * ((mixeng_real) IN_MAX - IN_MIN)));
#else
return ENDIAN_CONVERT ((IN_T) ((v * IN_MAX) + HALF));
#endif