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avcodec/clearvideo: Fix multiple runtime error: left shift of negative value -1024

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Fixes: 1360/clusterfuzz-testcase-minimized-5606472043986944

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 2017-05-06 12:17:01 +02:00
parent b20c71409b
commit c0ffcb34c7
1 changed files with 2 additions and 2 deletions
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4
libavcodec/clearvideo.c
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@ -185,8 +185,8 @@ static inline int decode_block(CLVContext *ctx, int16_t *blk, int has_ac,
const int t3 = OP( 2408 * blk[5 * step] - 1609 * blk[3 * step]); \
const int t4 = OP( 1108 * blk[2 * step] - 2676 * blk[6 * step]); \
const int t5 = OP( 2676 * blk[2 * step] + 1108 * blk[6 * step]); \
const int t6 = ((blk[0 * step] + blk[4 * step]) << dshift) + bias; \
const int t7 = ((blk[0 * step] - blk[4 * step]) << dshift) + bias; \
const int t6 = ((blk[0 * step] + blk[4 * step]) * (1 << dshift)) + bias; \
const int t7 = ((blk[0 * step] - blk[4 * step]) * (1 << dshift)) + bias; \
const int t8 = t0 + t2; \
const int t9 = t0 - t2; \
const int tA = 181 * (t9 + (t1 - t3)) + 0x80 >> 8; \