From 7197da21f6bcc1aaa5d1905228e0e2ec1caf3fa8 Mon Sep 17 00:00:00 2001 From: jacqueline Date: Mon, 17 Jul 2023 16:54:35 +1000 Subject: Basic playlists for upcoming Beware under-testing and bugs. Just getting something barebones in so that I can do rN+1 bringup --- src/util/random.cpp | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 src/util/random.cpp (limited to 'src/util/random.cpp') diff --git a/src/util/random.cpp b/src/util/random.cpp new file mode 100644 index 00000000..ae543765 --- /dev/null +++ b/src/util/random.cpp @@ -0,0 +1,37 @@ +/* + * Copyright 2023 jacqueline + * + * SPDX-License-Identifier: GPL-3.0-only + */ + +#include "random.hpp" + +#include + +#include "esp_random.h" +#include "komihash.h" + +namespace util { + +IRandom* sRandom = new Random(); + +Random::Random() { + esp_fill_random(&seed1_, sizeof(seed1_)); + seed2_ = seed1_; + + // komirand needs four iterations to properly self-start. + for (int i = 0; i < 4; i++) { + Next(); + } +} + +auto Random::Next() -> std::uint64_t { + return komirand(&seed1_, &seed2_); +} + +auto Random::RangeInclusive(std::uint64_t lower, std::uint64_t upper) + -> std::uint64_t { + return (Next() % (upper - lower + 1)) + lower; +} + +} // namespace util -- cgit v1.2.3