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Windows Media Player 11 SDK Selecting Items for Ripping 

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Selecting Items for Ripping

Sometimes a user does not want to rip every track on a CD. Windows Media Player provides an interface for specifying which tracks are selected for ripping. Typically in a CD ripping application there is a user interface that lets the user select check boxes in a list of tracks on the CD.

Some tracks might not be selected for ripping by default. If a track is already in the Windows Media Player library, it will not be automatically selected for ripping. The second code example in this section demonstrates how to bypass the default value and manually select a track for ripping if it has already been ripped.

The following code example demonstrates how to determine whether a track is selected for ripping:

HRESULT CMainDlg::IsTrackSelected(long lIndex, bool &bSelected)
{
    // The track is selected unless the
    // "SelectedForRip" attribute is true.
    bSelected = true;

    // bstrItemName and bstrVal are used for getItemInfo.
    CComBSTR bstrItemName;
    CComBSTR bstrVal;

    // Get an IWMPMedia from the Playlist.
    CComPtr<IWMPMedia> spMedia;
    HRESULT hr = m_spPlaylist->get_item(lIndex, &spMedia);

    // Check whether it is selected for ripping.
    if (SUCCEEDED(hr))
    {
        hr = bstrItemName.Append("SelectedForRip");
    }
    if (SUCCEEDED(hr))
    {
        hr = spMedia->getItemInfo(
            bstrItemName,
            &bstrVal);
    }
    if (SUCCEEDED(hr))
    {
        // If getItemInfo("SelectedForRip") is not "True"
        // then the track is not selected.
        if (wcscmp(bstrVal.m_str, L"True"))
            bSelected = false;
    }

    return hr;
}

The following code example demonstrates how to specify whether a track is selected for ripping.

HRESULT CMainDlg::SelectTrack (long lIndex, bool bSelected)
{
    // bstrItemName and bstrVal are used for setItemInfo.
    CComBSTR bstrItemName;
    CComBSTR bstrVal;

    // Get an IWMPMedia from the Playlist.
    CComPtr<IWMPMedia> spMedia;
    HRESULT hr = m_spPlaylist->get_item(lIndex, &spMedia);

    // Select the track for ripping.
    if (SUCCEEDED(hr))
    {
        hr = bstrItemName.Append("SelectedForRip");
    }
    if (SUCCEEDED(hr))
    {
        if (bSelected)
        {
            hr = bstrVal.Append("True");
        }
        else
        {
            hr = bstrVal.Append("False");
        }
    }
    if (SUCCEEDED(hr))
    {
        hr = spMedia->setItemInfo(
            bstrItemName,
            bstrVal);
    }

    return hr;
}

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