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avcodec/lpc: Fix lpc_apply_welch_window_c() for odd len

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Also removes assert
this fixes an assertion failure on non-x86

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-07-06 19:11:42 +02:00
parent 709bb45c66
commit a3a61d4663
1 changed files with 10 additions and 4 deletions
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14
libavcodec/lpc.c
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@ -37,13 +37,19 @@ static void lpc_apply_welch_window_c(const int32_t *data, int len,
double w;
double c;
/* The optimization in commit fa4ed8c does not support odd len.
* If someone wants odd len extend that change. */
av_assert2(!(len & 1));
n2 = (len >> 1);
c = 2.0 / (len - 1.0);
if (len & 1) {
for(i=0; i<n2; i++) {
w = c - i - 1.0;
w = 1.0 - (w * w);
w_data[i] = data[i] * w;
w_data[len-1-i] = data[len-1-i] * w;
}
return;
}
w_data+=n2;
data+=n2;
for(i=0; i<n2; i++) {