mirror of https://git.ffmpeg.org/ffmpeg.git
avfilter/af_dynaudnorm: remove wasteful pow
This removes wasteful pow(x, 2.0) that although not terribly important for speed, is still useless. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
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@ -237,13 +237,13 @@ static void init_gaussian_filter(DynamicAudioNormalizerContext *s)
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// Pre-compute constants
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// Pre-compute constants
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const int offset = s->filter_size / 2;
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const int offset = s->filter_size / 2;
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const double c1 = 1.0 / (sigma * sqrt(2.0 * M_PI));
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const double c1 = 1.0 / (sigma * sqrt(2.0 * M_PI));
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const double c2 = 2.0 * pow(sigma, 2.0);
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const double c2 = 2.0 * sigma * sigma;
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// Compute weights
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// Compute weights
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for (i = 0; i < s->filter_size; i++) {
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for (i = 0; i < s->filter_size; i++) {
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const int x = i - offset;
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const int x = i - offset;
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s->weights[i] = c1 * exp(-(pow(x, 2.0) / c2));
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s->weights[i] = c1 * exp(-x * x / c2);
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total_weight += s->weights[i];
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total_weight += s->weights[i];
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}
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}
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