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avcodec/vp3: Fix "runtime error: left shift of negative value"

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Fixes: 5c6129154b356b80bcab86f9e3ee5d29/signal_sigabrt_7ffff6ae7cc9_7322_d26ac6d7cb6567db1b8be0159b387d0b.ogg

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-12-04 12:47:20 +01:00
parent d89c4846e0
commit 18268f761b
1 changed files with 2 additions and 2 deletions
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4
libavcodec/vp3.c
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@ -209,8 +209,8 @@ typedef struct Vp3DecodeContext {
int16_t *dct_tokens[3][64];
int16_t *dct_tokens_base;
#define TOKEN_EOB(eob_run) ((eob_run) << 2)
#define TOKEN_ZERO_RUN(coeff, zero_run) (((coeff) << 9) + ((zero_run) << 2) + 1)
#define TOKEN_COEFF(coeff) (((coeff) << 2) + 2)
#define TOKEN_ZERO_RUN(coeff, zero_run) (((coeff) * 512) + ((zero_run) << 2) + 1)
#define TOKEN_COEFF(coeff) (((coeff) * 4) + 2)
/**
* number of blocks that contain DCT coefficients at