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avcodec/g729postfilter: Fix undefined intermediate pointers

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Fixes: index -49 out of bounds for type 'int16_t [192]'
Fixes: 17689/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ACELP_KELVIN_fuzzer-5756275014500352

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 0c61661a2c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-09-27 17:01:38 +02:00
parent d998b81ce1
commit 4b4c26ca09
1 changed files with 2 additions and 2 deletions
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libavcodec/g729postfilter.c
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@ -201,8 +201,8 @@ static int16_t long_term_filter(AudioDSPContext *adsp, int pitch_delay_int,
}
if (corr_int_num) {
/* Compute denominator of pseudo-normalized correlation R'(0). */
corr_int_den = adsp->scalarproduct_int16(sig_scaled - best_delay_int + RES_PREV_DATA_SIZE,
sig_scaled - best_delay_int + RES_PREV_DATA_SIZE,
corr_int_den = adsp->scalarproduct_int16(sig_scaled + RES_PREV_DATA_SIZE - best_delay_int,
sig_scaled + RES_PREV_DATA_SIZE - best_delay_int,
subframe_size);
/* Compute signals with non-integer delay k (with 1/8 precision),