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avfilter/vf_fftfilt: increase RDFT length by 10% 

This fixes artifacts when the dimensions are exact powers of 2

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-03-10 03:32:38 +01:00
parent 399e31419a
commit 3170b33e57
1 changed files with 2 additions and 2 deletions
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4
libavfilter/vf_fftfilt.c
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@ -208,14 +208,14 @@ static int config_props(AVFilterLink *inlink)
int h = inlink->h;
/* RDFT - Array initialization for Horizontal pass*/
for (rdft_hbits = 1; 1 << rdft_hbits < w; rdft_hbits++);
for (rdft_hbits = 1; 1 << rdft_hbits < w*10/9; rdft_hbits++);
fftfilt->rdft_hbits[i] = rdft_hbits;
fftfilt->rdft_hlen[i] = 1 << rdft_hbits;
if (!(fftfilt->rdft_hdata[i] = av_malloc_array(h, fftfilt->rdft_hlen[i] * sizeof(FFTSample))))
return AVERROR(ENOMEM);
/* RDFT - Array initialization for Vertical pass*/
for (rdft_vbits = 1; 1 << rdft_vbits < h; rdft_vbits++);
for (rdft_vbits = 1; 1 << rdft_vbits < h*10/9; rdft_vbits++);
fftfilt->rdft_vbits[i] = rdft_vbits;
fftfilt->rdft_vlen[i] = 1 << rdft_vbits;
if (!(fftfilt->rdft_vdata[i] = av_malloc_array(fftfilt->rdft_hlen[i], fftfilt->rdft_vlen[i] * sizeof(FFTSample))))