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Merge pull request #11 from Kleadron/dsound-attenuation

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DirectSound Attenuation
This commit is contained in:
iProgramInCpp
2023-08-01 12:15:40 +03:00
committed by GitHub
parent 653a6a62e2 40e54c2be8
commit 27b054a668
1 changed files with 24 additions and 0 deletions
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24
platforms/windows/SoundSystem_windows.cpp
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@@ -179,6 +179,30 @@ void SoundSystemWindows::playAt(const SoundDesc& sound, float x, float y, float
return;
}
// references:
// https://gamedev.net/forums/topic/337397-sound-volume-question-directsound/3243306/
// https://learn.microsoft.com/en-us/previous-versions/windows/desktop/mt708939(v=vs.85)
// Conversion from 0-1 linear volume to directsound logarithmic volume..
// This seems to work for the most part, but accuracy testing should be done for actual MCPE, water splashing is pretty quiet.
float attenuation = volume;//Lerp(DSBVOLUME_MIN, DSBVOLUME_MAX, volume);
// clamp the attenuation value
if (attenuation < 0.0f)
attenuation = 0.0f;
else if (attenuation > 1.0f)
attenuation = 1.0f;
if (attenuation == 0)
{
// no sound would come out, maybe skip playing this sound?
attenuation = DSBVOLUME_MIN;
}
else
{
attenuation = floorf(2000.0f * log10f(attenuation) + 0.5f);
}
(*soundbuffer)->SetVolume(LONG(attenuation));
(*soundbuffer)->Play(0, 0, 0);
m_buffers.push_back(soundbuffer);
}