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| author | Marcus Müller <mmueller@gnuradio.org> | 2021-03-25 18:13:35 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-03-25 13:13:35 -0400 |
| commit | 4dd02dac2fcaf45f398c074735a7359330f78d77 (patch) | |
| tree | b09529d96288fbdfb3ad703c3475fbb1154e2548 /gr-analog/lib/fastnoise_source_impl.h | |
| parent | 9a08594ae534c41d20e21187618de9ff3cc67336 (diff) | |
analog/fastnoise: avoid modulo operation when picking indices
When the pool is power-of-2-sized, index generation can be done using a simple bitmask. Document this, add logging info.
- use unsigned and fixed-length int where due
- avoid expensive integer modulo operation when possible
- extract power-of-two constexpr
- don't clutter the logs for small pool sizes
Signed-off-by: Marcus Müller <marcus@hostalia.de>
Diffstat (limited to 'gr-analog/lib/fastnoise_source_impl.h')
| -rw-r--r-- | gr-analog/lib/fastnoise_source_impl.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gr-analog/lib/fastnoise_source_impl.h b/gr-analog/lib/fastnoise_source_impl.h index 872f41e4b1..d20a1178ec 100644 --- a/gr-analog/lib/fastnoise_source_impl.h +++ b/gr-analog/lib/fastnoise_source_impl.h @@ -28,9 +28,10 @@ private: gr::random d_rng; std::vector<T> d_samples; uint64_t d_state[2]; + size_t d_bitmask; public: - fastnoise_source_impl(noise_type_t type, float ampl, long seed, long samples); + fastnoise_source_impl(noise_type_t type, float ampl, uint64_t seed, size_t samples); ~fastnoise_source_impl() override; T sample() override; |