mirror of https://git.ffmpeg.org/ffmpeg.git
avfilter/vf_fftfilt: simplify bits/len calculation
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933765aa0e
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8add1b39e2
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@ -266,7 +266,7 @@ static int config_props(AVFilterLink *inlink)
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{
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FFTFILTContext *s = inlink->dst->priv;
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const AVPixFmtDescriptor *desc;
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int rdft_hbits, rdft_vbits, i, plane;
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int i, plane;
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desc = av_pix_fmt_desc_get(inlink->format);
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s->depth = desc->comp[0].depth;
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@ -282,9 +282,8 @@ static int config_props(AVFilterLink *inlink)
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int h = s->planeheight[i];
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/* RDFT - Array initialization for Horizontal pass*/
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for (rdft_hbits = 1; 1 << rdft_hbits < w*10/9; rdft_hbits++);
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s->rdft_hbits[i] = rdft_hbits;
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s->rdft_hlen[i] = 1 << rdft_hbits;
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s->rdft_hlen[i] = 1 << (32 - ff_clz(w));
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s->rdft_hbits[i] = av_log2(s->rdft_hlen[i]);
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if (!(s->rdft_hdata[i] = av_malloc_array(h, s->rdft_hlen[i] * sizeof(FFTSample))))
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return AVERROR(ENOMEM);
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@ -294,9 +293,8 @@ static int config_props(AVFilterLink *inlink)
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return AVERROR(ENOMEM);
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/* RDFT - Array initialization for Vertical pass*/
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for (rdft_vbits = 1; 1 << rdft_vbits < h*10/9; rdft_vbits++);
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s->rdft_vbits[i] = rdft_vbits;
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s->rdft_vlen[i] = 1 << rdft_vbits;
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s->rdft_vlen[i] = 1 << (32 - ff_clz(h));
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s->rdft_vbits[i] = av_log2(s->rdft_vlen[i]);
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if (!(s->rdft_vdata[i] = av_malloc_array(s->rdft_hlen[i], s->rdft_vlen[i] * sizeof(FFTSample))))
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return AVERROR(ENOMEM);
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