function OnInit(initData)
{
    initData.name = "Video Frame Columns";
    initData.version = "2.0";
    initData.copyright = "";
    initData.url = "";
    initData.desc = "Brings Explorer's Length, Frame Width, Frame Height, Frame Rate, and TotalBitrate columns into Opus.";
    initData.default_enable = true;
    initData.min_version = "12.7.3";

    var col;
    var props;


    props = DOpus.FSUtil.GetShellPropertyList("System.Video.TotalBitrate", "r");
    if (props.count == 1)
    {
        var prop = props(0);
        col = initData.AddColumn();
        col.name = "TotalBitrate";
        col.multicol = true;
        col.method = "OnCol";
        col.label = "T.kbps";
        // col.label = prop.display_name;
        col.justify = "right";
        col.type = 'text';
        col.autogroup = true;
        col.autorefresh = 1;
        col.userdata = prop.pkey;
    }

    props = DOpus.FSUtil.GetShellPropertyList("System.Media.Duration", "r");
    if (props.count == 1)
    {
        var prop = props(0);
        col = initData.AddColumn();
        col.name = "Length";
        col.multicol = true;
        col.method = "OnCol";
        col.label = "Len";
        // col.label = prop.display_name;
        col.justify = "right";
        col.autogroup = true;
        col.autorefresh = 1;
        col.userdata = prop.pkey;
    }
    
    propsSampleRate = DOpus.FSUtil.GetShellPropertyList("System.Audio.SampleRate", "r");
    if (propsSampleRate.count == 1)
    {
        var prop = propsSampleRate(0);
        col = initData.AddColumn();
        col.name = "SampleRate";
        col.multicol = true;
        col.method = "OnCol";
        col.label = "Samples";
        // col.label = prop.display_name;
        col.justify = "right";
        col.autogroup = true;
        col.autorefresh = 1;
        col.userdata = prop.pkey;
        col.type = "double";
    }

    
    propsHeight = DOpus.FSUtil.GetShellPropertyList("System.Video.FrameHeight", "r");
    if (propsHeight.count == 1)
    {
        var prop = propsHeight(0);
        col = initData.AddColumn();
        col.name = "FrameHeight";
        col.multicol = true;
        col.method = "OnCol";
        col.label = "frameH";
        // col.label = prop.display_name;
        col.justify = "right";
        col.autogroup = true;
        col.autorefresh = 1;
        col.userdata = prop.pkey;
        col.type = "number";
    }
    
    propsWidth = DOpus.FSUtil.GetShellPropertyList("System.Video.FrameWidth", "r");
    if (propsWidth.count == 1)
    {
        var prop = propsWidth(0);
        col = initData.AddColumn();
        col.name = "FrameWidth";
        col.multicol = true;
        col.method = "OnCol";
        col.label = "frameW";
        // col.label = prop.display_name;
        col.justify = "right";
        col.autogroup = true;
        col.autorefresh = 1;
        col.userdata = prop.pkey;
        col.type = "number";
    }

    if (propsHeight.count == 1 && propsWidth.count == 1)
    {
        col = initData.AddColumn();
        col.name = "Dimensions";
        col.multicol = true;
        col.method = "OnCol";
        col.label = "frameSize";
        col.justify = "right";
        col.autogroup = false;
        col.userdata = DOpus.Create.Vector(propsHeight(0).pkey+"", propsWidth(0).pkey+"");
    }


    props = DOpus.FSUtil.GetShellPropertyList("System.Video.FrameRate", "r");
    if (props.count == 1)
    {
        var prop = props(0);
        col = initData.AddColumn();
        col.name = "FrameRate";
        col.multicol = true;
        col.method = "OnCol";
        col.label = "Fps";
        // col.label = prop.display_name;
        col.justify = "right";
        col.autogroup = true;
        col.autorefresh = 1;
        col.userdata = prop.pkey;
        col.type = "double";
    }
}

function OnCol(scriptColData)
{
    try
    {
        var fileItem = scriptColData.item;
        var width;
        var height;
        var triedWidth = false;
        var triedHeight = false;

        for (var e = new Enumerator(scriptColData.columns); !e.atEnd(); e.moveNext())
        {
            var colName = e.item();
            var colData = scriptColData.columns(colName);

            if (colName == "Dimensions")
            {
                if (!triedHeight)
                {
                    height = fileItem.shellprop(colData.userdata(0));
                    triedHeight = true;
                }
                if (!triedWidth)
                {
                    width = fileItem.shellprop(colData.userdata(1));
                    triedWidth = true;
                }

                if (typeof(height) == "number" && typeof(width) == "number")
                {
                    colData.value = width + "x" + height;
                    colData.sort = DOpus.Create.Vector(width, height);
                }
                else
                {
                    colData.value = ""; // Ensure we set a value so we don't get asked again for this column.
                }
            }
            else
            {
                if (colName == "FrameHeight")
                {
                    if (!triedHeight)
                    {
                        height = fileItem.shellprop(colData.userdata);
                        triedHeight = true;
                    }

                    colData.value = height;
                }
                else if (colName == "FrameWidth")
                {
                    if (!triedWidth)
                    {
                        width = fileItem.shellprop(colData.userdata)
                        triedWidth = true;
                    }

                    colData.value = width;
                }
                else
                {
                    colData.value = fileItem.shellprop(colData.userdata);
                }

                // ================================================
                if (typeof(colData.value) == "number")
                {
                    if (colName == "TotalBitrate") 
                    {
                        if (colData.value > 0)
                        {
                            var kbps = colData.value / 1000;
                            colData.value = Math.floor(kbps);
                        }
                        else
                        {
                            colData.value = "";
                        }
                    }
                    else if (colName == "SampleRate")
                    {
                        colData.value = (colData.value /= 1000).toFixed(1) + " kHz";
                    }
                    else if (colName == "FrameRate")
                    {
                        colData.value = (colData.value /= 1000).toFixed(2);
                    }
                    else if (colName == "Length")
                    {
                        var seconds = colData.value / 10000000;

                        colData.sort = seconds;

                        var hours = Math.floor(seconds / 3600);
                        seconds %= 3600;
                        var minutes = Math.floor(seconds / 60);
                        seconds = Math.floor(seconds%60);

                        colData.value = hours + ":" + ZeroPad(minutes,2) + ":" + ZeroPad(seconds,2);
                    }
                }
                else
                {
                    colData.value = ""; // Ensure we set a value so we don't get asked again for this column.
                }
            }
        }
    }
    catch (e)
    {
        scriptColData.value = "<Error>";
        return;
    }
}

function ZeroPad(n, digits)
{
    var s = n + "";
    while (s.length < digits)
    {
        s = "0" + s;
    }
    return s;
}