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Code Issues Releases Activity

avfilter/vf_fftfilt: simplify bits/len calculation

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This commit is contained in:
Paul B Mahol
2021-10-13 23:10:05 +02:00
parent 933765aa0e
commit 8add1b39e2
1 changed files with 5 additions and 7 deletions
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12
libavfilter/vf_fftfilt.c
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@@ -266,7 +266,7 @@ static int config_props(AVFilterLink *inlink)
{ {
FFTFILTContext *s = inlink->dst->priv; FFTFILTContext *s = inlink->dst->priv;
const AVPixFmtDescriptor *desc; const AVPixFmtDescriptor *desc;
int rdft_hbits, rdft_vbits, i, plane; int i, plane;
desc = av_pix_fmt_desc_get(inlink->format); desc = av_pix_fmt_desc_get(inlink->format);
s->depth = desc->comp[0].depth; s->depth = desc->comp[0].depth;
@@ -282,9 +282,8 @@ static int config_props(AVFilterLink *inlink)
int h = s->planeheight[i]; int h = s->planeheight[i];
/* RDFT - Array initialization for Horizontal pass*/ /* RDFT - Array initialization for Horizontal pass*/
for (rdft_hbits = 1; 1 << rdft_hbits < w*10/9; rdft_hbits++); s->rdft_hlen[i] = 1 << (32 - ff_clz(w));
s->rdft_hbits[i] = rdft_hbits; s->rdft_hbits[i] = av_log2(s->rdft_hlen[i]);
s->rdft_hlen[i] = 1 << rdft_hbits;
if (!(s->rdft_hdata[i] = av_malloc_array(h, s->rdft_hlen[i] * sizeof(FFTSample)))) if (!(s->rdft_hdata[i] = av_malloc_array(h, s->rdft_hlen[i] * sizeof(FFTSample))))
return AVERROR(ENOMEM); return AVERROR(ENOMEM);
@@ -294,9 +293,8 @@ static int config_props(AVFilterLink *inlink)
return AVERROR(ENOMEM); return AVERROR(ENOMEM);
/* RDFT - Array initialization for Vertical pass*/ /* RDFT - Array initialization for Vertical pass*/
for (rdft_vbits = 1; 1 << rdft_vbits < h*10/9; rdft_vbits++); s->rdft_vlen[i] = 1 << (32 - ff_clz(h));
s->rdft_vbits[i] = rdft_vbits; s->rdft_vbits[i] = av_log2(s->rdft_vlen[i]);
s->rdft_vlen[i] = 1 << rdft_vbits;
if (!(s->rdft_vdata[i] = av_malloc_array(s->rdft_hlen[i], s->rdft_vlen[i] * sizeof(FFTSample)))) if (!(s->rdft_vdata[i] = av_malloc_array(s->rdft_hlen[i], s->rdft_vlen[i] * sizeof(FFTSample))))
return AVERROR(ENOMEM); return AVERROR(ENOMEM);