/**
* Decodes consecutive items until the given length is reached
*
* @param CDicomStreamReader $stream_reader The stream reader
*
* @param integer $length The code of the wanted type
*
* @return CDicomPDUItem[] The PDU items
*/
static function decodeConsecutiveItemsByLength(CDicomStreamReader $stream_reader, $length)
{
$items = array();
$pos = $stream_reader->getPos();
$endOfItem = $pos + $length;
$item_type = self::readItemType($stream_reader);
while ($item_type && $stream_reader->getPos() < $endOfItem) {
if (!$item_type) {
break;
}
$item_length = self::readItemLength($stream_reader);
$item = new $item_type(array("length" => $item_length));
$item->decodeItem($stream_reader);
$items[] = $item;
if ($stream_reader->getPos() < $endOfItem) {
$item_type = self::readItemType($stream_reader);
}
}
return $items;
}
/**
* Decode the datas, depending on the transfer syntax
*
* @param CDicomStreamReader $stream_reader The stream writer
*
* @param string $transfer_syntax The UID of the transfer syntax
*
* @return void
*/
function decode(CDicomStreamReader $stream_reader, $transfer_syntax)
{
if (!$transfer_syntax) {
return;
}
$this->attributes = array();
$this->datasets = array();
$stream_length = $stream_reader->getStreamLength();
while ($stream_reader->getPos() < $stream_length) {
$dataset = new CDicomDataSet();
$dataset->decode($stream_reader, $transfer_syntax);
$group = $dataset->getGroupNumber();
$element = $dataset->getElementNumber();
if (!array_key_exists($group, $this->datasets)) {
$this->datasets[$group] = array();
}
if (!array_key_exists($group, $this->attributes)) {
$this->attributes[$group] = array();
}
$this->datasets[$group][$element] = $dataset;
$this->attributes[$group][$element] = $dataset->getValue();
}
}
/**
* Decode the PDU
*
* @param CDicomStreamReader $stream_reader The stream reader
*
* @return null
*/
function decodePDU(CDicomStreamReader $stream_reader)
{
$this->pdvs = array();
$stream_reader->setStreamLength($this->getTotalLength());
while ($stream_reader->getPos() < $stream_reader->getStreamLength()) {
$pdv_length = $stream_reader->readUInt32();
// + 4;
//$stream_reader->seek(-4);
$pdv_content = $stream_reader->read($pdv_length);
$pdv_handle = fopen('php://temp', 'w+');
fwrite($pdv_handle, $pdv_content, $pdv_length);
$pdv_stream = new CDicomStreamReader($pdv_handle);
$pdv_stream->rewind();
$pdv = new CDicomPDV(array("presentation_contexts" => $this->presentation_contexts, "length" => $pdv_length));
$pdv->decode($pdv_stream);
$this->pdvs[] = $pdv;
}
}
