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Use the proper lower bound when doing saturation arithmetic.

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16 bit signed integers have a range of [-32768, 32768).  The existing code
was using the interval (-32768, 32768) instead.  This patch fixes that.

Review: https://reviewboard.asterisk.org/r/2479/
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Merged revisions 386929 from http://svn.asterisk.org/svn/asterisk/branches/1.8
........

Merged revisions 386930 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@386931 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Sean Bright
2013-04-30 13:48:12 +00:00
parent e2cd14876f
commit c03b95a3d7
1 changed files with 6 additions and 6 deletions
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12
include/asterisk/utils.h
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@@ -324,8 +324,8 @@ static force_inline void ast_slinear_saturated_add(short *input, short *value)
res = (int) *input + *value; res = (int) *input + *value;
if (res > 32767) if (res > 32767)
*input = 32767; *input = 32767;
else if (res < -32767) else if (res < -32768)
*input = -32767; *input = -32768;
else else
*input = (short) res; *input = (short) res;
} }
@@ -337,8 +337,8 @@ static force_inline void ast_slinear_saturated_subtract(short *input, short *val
res = (int) *input - *value; res = (int) *input - *value;
if (res > 32767) if (res > 32767)
*input = 32767; *input = 32767;
else if (res < -32767) else if (res < -32768)
*input = -32767; *input = -32768;
else else
*input = (short) res; *input = (short) res;
} }
@@ -350,8 +350,8 @@ static force_inline void ast_slinear_saturated_multiply(short *input, short *val
res = (int) *input * *value; res = (int) *input * *value;
if (res > 32767) if (res > 32767)
*input = 32767; *input = 32767;
else if (res < -32767) else if (res < -32768)
*input = -32767; *input = -32768;
else else
*input = (short) res; *input = (short) res;
} }