NINI
12 lines
1.1 KiB
PowerShell
12 lines
1.1 KiB
PowerShell
param([Parameter(Mandatory)][string]$CapturedPath,[Parameter(Mandatory)][string]$OutputPath)
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$ErrorActionPreference='Stop'
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$bytes=[IO.File]::ReadAllBytes((Resolve-Path $CapturedPath).Path)
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$rate=[BitConverter]::ToInt32($bytes,24);$count=($bytes.Length-44)/2
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if([BitConverter]::ToInt16($bytes,20)-ne1-or[BitConverter]::ToInt16($bytes,22)-ne1-or[BitConverter]::ToInt16($bytes,34)-ne16-or[Text.Encoding]::ASCII.GetString($bytes,36,4)-ne'data'){throw 'Canonical actual monoPCM16 required'}
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$startEnergy=0.0;$tailEnergy=0.0;$tailSamples=0;$frontSamples=0
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for($i=0;$i-lt$count;$i++){$v=[double][BitConverter]::ToInt16($bytes,44+$i*2);if($i-lt$rate*3){$startEnergy+=$v*$v;$frontSamples++};if($i-ge$count-$rate*3){$tailEnergy+=$v*$v;$tailSamples++}}
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$frontRms=[Math]::Sqrt($startEnergy/$frontSamples);$tailRms=[Math]::Sqrt($tailEnergy/$tailSamples)
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$passed=$count/$rate-ge8-and$frontRms-gt32-and$tailRms-le32
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@{passed=$passed;duration=$count/$rate;first3secondsRms=$frontRms;last3secondsRms=$tailRms;thresholdRms=32;capturedSha256=(Get-FileHash $CapturedPath).Hash}|ConvertTo-Json|Set-Content -LiteralPath $OutputPath
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if(!$passed){exit 1};exit 0
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