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avcodec/wavpack: Fix runtime error: signed integer overflow: -2147483648 + -83886075 cannot be represented in type 'int' 

Fixes: 761/clusterfuzz-testcase-5442222252097536

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-03-11 03:25:41 +01:00
parent 0bab78f7e7
commit 47cc9c1d77
1 changed files with 2 additions and 2 deletions
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libavcodec/wavpack.h
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@ -99,8 +99,8 @@ typedef struct WvChannel {
// macros for manipulating median values // macros for manipulating median values
#define GET_MED(n) ((c->median[n] >> 4) + 1) #define GET_MED(n) ((c->median[n] >> 4) + 1)
#define DEC_MED(n) c->median[n] -= ((c->median[n] + (128 >> (n)) - 2) / (128 >> (n))) * 2 #define DEC_MED(n) c->median[n] -= ((c->median[n] + (128 >> (n)) - 2) / (128 >> (n))) * 2U
#define INC_MED(n) c->median[n] += ((c->median[n] + (128 >> (n)) ) / (128 >> (n))) * 5 #define INC_MED(n) c->median[n] += ((c->median[n] + (128 >> (n)) ) / (128 >> (n))) * 5U
// macros for applying weight // macros for applying weight
#define UPDATE_WEIGHT_CLIP(weight, delta, samples, in) \ #define UPDATE_WEIGHT_CLIP(weight, delta, samples, in) \