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