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// Copyright (c) the JPEG XL Project Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "lib/jxl/base/random.h"
#include <cmath>
namespace jxl {
Rng::GeometricDistribution::GeometricDistribution(float p)
: inv_log_1mp(1.0 / std::log(1 - p)) {}
uint32_t Rng::Geometric(const GeometricDistribution& dist) {
float f = UniformF(0, 1);
float log = std::log(1 - f) * dist.inv_log_1mp;
return static_cast<uint32_t>(log);
}
} // namespace jxl
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