function getStreamImageURL($stream_id, $req_time = null, $req_size = null, $directLink = false)
{
global $wgScript, $mvWebImgLoc, $mvLocalImgLoc, $mvExternalImages;
//check global external image prefrence:
$req_size_out = $req_size != null ? '&size=' . $req_size : '';
if ($mvExternalImages) {
global $mvExternalImgServerPath;
//try to get the stream_name for external requests:
$sn = MV_Stream::getStreamNameFromId($stream_id);
return $mvExternalImgServerPath . '?action=ajax&rs=mv_frame_server&stream_name=' . $sn . '&t=' . $req_time . $req_size_out;
}
//by default return a non-direct link so that javascript can modify the url to get new images
if (!$directLink) {
return $wgScript . '?action=ajax&rs=mv_frame_server&stream_id=' . $stream_id . '&t=' . $req_time . $req_size_out;
}
$req_time = MV_StreamImage::procRequestTime($stream_id, $req_time);
if ($req_time == false) {
return MV_StreamImage::getMissingImageURL($req_size);
}
//print "got req time: $req_time<br />";
//first check if the file exist
if (is_file(MV_StreamImage::getLocalImagePath($stream_id, $req_time, $req_size))) {
if ($req_size == null) {
$s = '';
$ext = 'jpg';
//default type is jpg
} else {
list($im_width, $im_height, $ext) = MV_StreamImage::getSizeType($req_size);
$s = '_' . $im_width . 'x' . $im_height;
}
return $mvWebImgLoc . '/' . MV_StreamImage::getRelativeImagePath($stream_id) . '/' . $req_time . $s . '.' . $ext;
} else {
//throw 'error finding image';
return MV_StreamImage::getMissingImageURL($req_size);
}
}
