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Use an intermediate variable for overflow testing
author
Vitor Sessak
<vitor1001@gmail.com>
Sat, 24 May 2008 16:38:48 +0000
(16:38 +0000)
committer
Vitor Sessak
<vitor1001@gmail.com>
Sat, 24 May 2008 16:38:48 +0000
(16:38 +0000)
Originally committed as revision 13283 to svn://svn.ffmpeg.org/ffmpeg/trunk
libavcodec/ra144.c
patch
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diff --git
a/libavcodec/ra144.c
b/libavcodec/ra144.c
index
5cfe94f
..
d4dc477
100644
(file)
--- a/
libavcodec/ra144.c
+++ b/
libavcodec/ra144.c
@@
-154,19
+154,22
@@
static void final(const short *i1, const short *i2,
for (i=0; i<len; i++) {
int sum = 0;
+ int new_val;
for(x=0; x<10; x++)
sum += i1[9-x] * ptr[x];
sum >>= 12;
- if (ptr[10] - sum < -32768 || ptr[10] - sum > 32767) {
+ new_val = ptr[10] - sum;
+
+ if (new_val < -32768 || new_val > 32767) {
memset(out, 0, len * 2);
memset(statbuf, 0, 20);
return;
}
- ptr[10]
-= sum
;
+ ptr[10]
= new_val
;
ptr++;
}