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# This code is distributed under the Apache 2.0 License.
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# author: nptr
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$files = Get-ChildItem -Recurse -Filter *.flac | Select-Object FullName, BaseName
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$files | ForEach-Object {
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    $fullName = $_.FullName
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    $fileName = $_.BaseName
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    Write-Host Processing $fileName
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    $flag = metaflac --show-tag=BP $fullName
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    $res = metaflac --show-sample-rate $fullName
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    $skip = 0
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    switch ($res) {
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        44100 { $skip = 286 }
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        48000 { $skip = 312 }
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        96000 { $skip = 624 }
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        192000 { $skip = 1248 }
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        Default { $skip = 0 }
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    }
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    if ($flag -ne "BP=1") {
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        Write-Host SampleRate: $($res / 1000)kHz, skip $skip
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        if ($skip -ne 0) {
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            flac -8 --skip=$skip -f $fullName
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            metaflac --set-tag=BP=1 $fullName
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        }
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    }
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    else {
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        Write-Host Skipping $fileName
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    }
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}