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avfilter/avf_showcwt: fix very low freqs leakage

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This commit is contained in:
Paul B Mahol 2023-07-29 00:52:53 +02:00
parent 27b4364339
commit 6f6907fd20
1 changed files with 2 additions and 0 deletions
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2
libavfilter/avf_showcwt.c
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@ -636,6 +636,7 @@ static int compute_kernel(AVFilterContext *ctx)
const int fsize = s->frequency_band_count;
int *kernel_start = s->kernel_start;
int *kernel_stop = s->kernel_stop;
const int hsize = size >> 1;
unsigned *index = s->index;
int kernel_min = INT_MAX;
int kernel_max = 0, ret = 0;
@ -656,6 +657,7 @@ static int compute_kernel(AVFilterContext *ctx)
for (int n = 0; n < size; n++) {
float ff, f = n-frequency;
f = hsize - fabsf(f - hsize);
ff = expf(-f*f*deviation);
tkernel[n] = ff;
}