avfilter/avf_showcwt: fix very low freqs leakage

Paul B Mahol committed 3 years ago

Commit 6f6907f1 parent 27b43641 file · +2 −0Browse files

Showing the changes to libavfilter (1 of 1 file). Show all

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libavfilter/avf_showcwt.c+2−0

@@ -636,6 +636,7 @@ static int compute_kernel(AVFilterContext *ctx) · 635 unmodified lines
636	636	const int fsize = s->frequency_band_count;
637	637	int *kernel_start = s->kernel_start;
638	638	int *kernel_stop = s->kernel_stop;
	639	+ const int hsize = size >> 1;
639	640	unsigned *index = s->index;
640	641	int kernel_min = INT_MAX;
641	642	int kernel_max = 0, ret = 0;
@@ -656,6 +657,7 @@ static int compute_kernel(AVFilterContext *ctx) · 14 unmodified lines
656	657	for (int n = 0; n < size; n++) {
657	658	float ff, f = n-frequency;
658	659
	660	+ f = hsize - fabsf(f - hsize);
659	661	ff = expf(-ffdeviation);
660	662	tkernel[n] = ff;
661	663	}