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HRTF DSP: Add gain correction to impulse resampler

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Impulses should be gain scaled roughly based on the sample ratio
relative to the original impulses. Lower target sample rate means less
impulses means gain goes up, higher target sample rate means more
impulses so gain goes down. Somewhat simple, seems to work.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>
This commit is contained in:
Christopher Snowhill 2025-02-12 21:08:25 -08:00
parent 9346a4edbd
commit 8790df1ef0
1 changed files with 1 additions and 0 deletions
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Audio/Chain/DSP/HeadphoneFilter.mm
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@ -191,6 +191,7 @@ static impulseSetCache *_sharedController = nil;
if(resampling) {
sampleCountResampled = (uint32_t)(((double)sampleCountExact) * sampleRate / sampleRateOfSource);
actualSampleCount = (uint32_t)(((double)actualSampleCount) * sampleRate / sampleRateOfSource);
io_spec.scale = sampleRateOfSource / sampleRate;
}
actualSampleCount = (actualSampleCount + 15) & ~15;