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celp filters: Do not read earlier than the start of the 'out' vector. 

CC: libav-stable@libav.org
(cherry picked from commit 37ddd38332)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
(cherry picked from commit 9ea94c44b1)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
This commit is contained in:
Alex Converse 2012-05-04 10:27:03 -07:00 committed by Reinhard Tartler
parent 50073e2395
commit 08c81f7365
1 changed files with 1 additions and 3 deletions
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4
libavcodec/celp_filters.c
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@ -133,9 +133,8 @@ void ff_celp_lp_synthesis_filterf(float *out, const float *filter_coeffs,
out2 -= val * old_out2;
out3 -= val * old_out3;
old_out3 = out[-5];
for (i = 5; i <= filter_length; i += 2) {
old_out3 = out[-i];
val = filter_coeffs[i-1];
out0 -= val * old_out3;
@ -154,7 +153,6 @@ void ff_celp_lp_synthesis_filterf(float *out, const float *filter_coeffs,
FFSWAP(float, old_out0, old_out2);
old_out1 = old_out3;
old_out3 = out[-i-2];
}
tmp0 = out0;