function soundmap_ajax_file_uploaded_callback()
{
    if (!isset($_FILES['Filedata'])) {
        die;
    }
    $rtn = array();
    $rtn['error'] = "";
    $file_data = $_FILES['Filedata'];
    if ($file_data['error'] != 0) {
        die;
    }
    $fileName = sanitize_file_name($file_data['name']);
    //Check the directory.
    $months_folders = get_option('uploads_use_yearmonth_folders');
    $wud = wp_upload_dir();
    if ($wud['error']) {
        $rtn['error'] = $wud['error'];
        echo json_encode($rtn);
        die;
    }
    $targetDir = $wud['path'];
    $targetURL = $wud['url'];
    //check if the file exists.
    if (file_exists($targetDir . DIRECTORY_SEPARATOR . $fileName)) {
        $ext = strrpos($fileName, '.');
        $fileName_a = substr($fileName, 0, $ext);
        $fileName_b = substr($fileName, $ext);
        $count = 1;
        while (file_exists($targetDir . DIRECTORY_SEPARATOR . $fileName_a . '_' . $count . $fileName_b)) {
            $count++;
        }
        $fileName = $fileName_a . '_' . $count . $fileName_b;
    }
    $tempDir = $file_data['tmp_name'];
    //move it.
    $fileDir = $targetDir . DIRECTORY_SEPARATOR . $fileName;
    $fileURL = $targetURL . DIRECTORY_SEPARATOR . $fileName;
    if (!rename($tempDir, $fileDir)) {
        $rtn['error'] = __('Error moving the file.', 'soundmap');
        echo json_encode($rtn);
        die;
    }
    $fileInfo = soundmap_get_id3info($fileDir);
    if (!($sound_attach_id = soundmap_add_media_attachment($fileDir, $fileURL))) {
        die;
    }
    $rtn['attachment'] = $sound_attach_id;
    $rtn['length'] = $fileInfo['play_time'];
    $rtn['fileName'] = $fileName;
    echo json_encode($rtn);
    die;
}
function soundmap_rss_enclosure()
{
    $id = get_the_ID();
    $files = get_post_meta($id, 'soundmap_attachments_id', FALSE);
    foreach ((array) $files as $key => $value) {
        $fileURI = wp_get_attachment_url($value);
        $info = soundmap_get_id3info($file['filePath']);
        echo apply_filters('rss_enclosure', '<enclosure url="' . trim(htmlspecialchars($fileURI)) . '" length="' . trim($info['playtime_string']) . '" type="audio/mpeg" />' . "\n");
    }
}