Acidized Wav file column (for music producers)

Buttons/Scripts
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Magix Acid (formerly Sony Acid, and before that Sonic Foundry Acid) creates loop wav files also called "acidized" wav files.
This script allows you to add a column under details view that will show if a wav file is acidized or not, and thus, a loop.

Useful when you have lots of wav files and need to see which ones have been "acidized".

// Directory Opus Script: Acidized WAV Detector v3 (Robust Binary)
// Detects if a WAV file contains the proprietary "acid" RIFF chunk

function OnInit(initData) {
    initData.name = "Acidized WAV Detector v3";
    initData.desc = "Adds a column showing if a WAV file is acidized (contains 'acid' chunk) - robust version";
    initData.copyright = "Public Domain / Community";
    initData.version = "3.0";
    initData.default_enable = true;

    var col = initData.AddColumn();
    col.name = "Acidized";
    col.method = "OnAcidized";
    col.label = "Acidized";
    col.justify = "left";
    col.autogroup = true;
    col.multicol = false;
}

function OnAcidized(scriptColData) {
    var ext = scriptColData.item.ext.toLowerCase();
    if (ext != ".wav" && ext != ".wave") {
        return;
    }

    var path = scriptColData.item.realpath;
    if (!path) return;

    var stream = new ActiveXObject("ADODB.Stream");
    stream.Type = 1; // adTypeBinary
    stream.Open();
    try {
        stream.LoadFromFile(path);
    } catch (e) {
        return; // Can't load file
    }

    if (stream.Size < 20) { // Too small for RIFF WAVE + at least one chunk
        stream.Close();
        return;
    }

    stream.Position = 0;
    var data = stream.Read(-1); // Read entire file as binary (variant/byte array)
    stream.Close();

    var bytes = new VBArray(data).toArray(); // Convert to JS array of bytes (0-255)

    // Check RIFF WAVE header
    if (bytes[0] != 0x52 || bytes[1] != 0x49 || bytes[2] != 0x46 || bytes[3] != 0x46 || // "RIFF"
        bytes[8] != 0x57 || bytes[9] != 0x41 || bytes[10] != 0x56 || bytes[11] != 0x45) { // "WAVE"
        return;
    }

    var found = false;
    var pos = 12; // Start after RIFF header

    while (pos < bytes.length - 8) {
        var id = String.fromCharCode(bytes[pos], bytes[pos+1], bytes[pos+2], bytes[pos+3]);

        if (id == "acid") {
            found = true;
            break;
        }

        // Get chunk size (little-endian uint32)
        var size = bytes[pos+4] | (bytes[pos+5] << 8) | (bytes[pos+6] << 16) | (bytes[pos+7] << 24);

        pos += 8 + size;
        if (size % 2 == 1) pos++; // Padding for odd-sized chunks
        if (pos > bytes.length) break;
    }

    scriptColData.value = found ? "Yes" : "No";
}

how to install:

  1. go to Settings > Preferences > Toolbars > Scripts.
  2. Click New > Script Add-In (JScript).

how to show column:
in details view, right click on column headers, and choose:
Columns->Script->Acidized

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