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avcodec/amrwbdec: Fix 2 runtime errors: left shift of negative value -1

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Fixes: 669/clusterfuzz-testcase-4847965409640448

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 2017-02-25 02:19:43 +01:00
parent 310d2af319
commit 6bd79ba59f
1 changed files with 2 additions and 2 deletions
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4
libavcodec/amrwbdec.c
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@ -292,7 +292,7 @@ static void decode_pitch_lag_low(int *lag_int, int *lag_frac, int pitch_index,
if (subframe == 0 || (subframe == 2 && mode != MODE_6k60)) {
if (pitch_index < 116) {
*lag_int = (pitch_index + 69) >> 1;
*lag_frac = (pitch_index - (*lag_int << 1) + 68) << 1;
*lag_frac = (pitch_index - (*lag_int << 1) + 68) * 2;
} else {
*lag_int = pitch_index - 24;
*lag_frac = 0;
@ -302,7 +302,7 @@ static void decode_pitch_lag_low(int *lag_int, int *lag_frac, int pitch_index,
AMRWB_P_DELAY_MIN, AMRWB_P_DELAY_MAX - 15);
} else {
*lag_int = (pitch_index + 1) >> 1;
*lag_frac = (pitch_index - (*lag_int << 1)) << 1;
*lag_frac = (pitch_index - (*lag_int << 1)) * 2;
*lag_int += *base_lag_int;
}
}