From 10693d306340dfc4c6c7ee7c71aa73a31f0b8ea9 Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Wed, 20 Dec 2023 21:47:58 -0800
Subject: Avoid using a couple C limits macros
---
alc/alu.cpp | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
(limited to 'alc/alu.cpp')
diff --git a/alc/alu.cpp b/alc/alu.cpp
index 1a740d6f..a660b7bd 100644
--- a/alc/alu.cpp
+++ b/alc/alu.cpp
@@ -2068,11 +2068,12 @@ void ApplyDistanceComp(const al::span<FloatBufferLine> Samples, const size_t Sam
void ApplyDither(const al::span<FloatBufferLine> Samples, uint *dither_seed,
const float quant_scale, const size_t SamplesToDo)
{
+ static constexpr double invRNGRange{1.0 / std::numeric_limits<uint>::max()};
ASSUME(SamplesToDo > 0);
/* Dithering. Generate whitenoise (uniform distribution of random values
* between -1 and +1) and add it to the sample values, after scaling up to
- * the desired quantization depth amd before rounding.
+ * the desired quantization depth and before rounding.
*/
const float invscale{1.0f / quant_scale};
uint seed{*dither_seed};
@@ -2081,7 +2082,7 @@ void ApplyDither(const al::span<FloatBufferLine> Samples, uint *dither_seed,
float val{sample * quant_scale};
uint rng0{dither_rng(&seed)};
uint rng1{dither_rng(&seed)};
- val += static_cast<float>(rng0*(1.0/UINT_MAX) - rng1*(1.0/UINT_MAX));
+ val += static_cast<float>(rng0*invRNGRange - rng1*invRNGRange);
return fast_roundf(val) * invscale;
};
for(FloatBufferLine &inout : Samples)
--
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