From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- third_party/jpeg-xl/lib/jxl/base/random.cc | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 third_party/jpeg-xl/lib/jxl/base/random.cc (limited to 'third_party/jpeg-xl/lib/jxl/base/random.cc') diff --git a/third_party/jpeg-xl/lib/jxl/base/random.cc b/third_party/jpeg-xl/lib/jxl/base/random.cc new file mode 100644 index 0000000000..c99f88921c --- /dev/null +++ b/third_party/jpeg-xl/lib/jxl/base/random.cc @@ -0,0 +1,21 @@ +// 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 + +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(log); +} + +} // namespace jxl -- cgit v1.2.3