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Convert Lanczos resampler from double to float

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Forgot that C++98 has a float version of `sin`.
This commit is contained in:
Clownacy 2020-09-01 19:57:08 +01:00
parent d946cfd579
commit 9f002b6180
1 changed files with 5 additions and 5 deletions
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10
src/Backends/Audio/SoftwareMixer.cpp
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@ -153,22 +153,22 @@ ATTRIBUTE_HOT void Mixer_MixSounds(long *stream, size_t frames_total)
// Perform Lanczos resampling // Perform Lanczos resampling
const int kernel_radius = 2; const int kernel_radius = 2;
double accumulator = 0; float accumulator = 0;
for (int i = -MIN(kernel_radius - 1, sound->position); i <= kernel_radius; ++i) for (int i = -MIN(kernel_radius - 1, sound->position); i <= kernel_radius; ++i)
{ {
const signed char input_sample = sound->samples[(sound->position + i) % sound->frames]; const signed char input_sample = sound->samples[(sound->position + i) % sound->frames];
const double kernel_input = ((double)sound->position_subsample / 0x10000) - i; const float kernel_input = ((float)sound->position_subsample / 0x10000) - i;
if (kernel_input == 0.0) if (kernel_input == 0.0f)
{ {
accumulator += input_sample; accumulator += input_sample;
} }
else else
{ {
const double nx = 3.14159265358979323846 * kernel_input; const float nx = 3.14159265358979323846f * kernel_input;
const double nxa = nx / kernel_radius; const float nxa = nx / kernel_radius;
accumulator += input_sample * (sin(nx) * sin(nxa) / (nx * nxa)); accumulator += input_sample * (sin(nx) * sin(nxa) / (nx * nxa));
} }