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celp filters: Do not read earlier than the start of the 'out' vector.
author
Alex Converse
<alex.converse@gmail.com>
Fri, 4 May 2012 17:27:03 +0000
(10:27 -0700)
committer
Alex Converse
<alex.converse@gmail.com>
Fri, 4 May 2012 17:55:31 +0000
(10:55 -0700)
CC: libav-stable@libav.org
libavcodec/celp_filters.c
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diff --git
a/libavcodec/celp_filters.c
b/libavcodec/celp_filters.c
index
25a6744
..
849cda4
100644
(file)
--- a/
libavcodec/celp_filters.c
+++ b/
libavcodec/celp_filters.c
@@
-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;