/**
* Get the type of the PDU, and create the corresponding CDicomPDU
*
* @param string $pdu_content The datas sent by the client
*
* @param array $presentation_contexts The presentation contexts
*
* @return CDicomPDU The PDU
*/
static function decodePDU($pdu_content, $presentation_contexts = null)
{
$stream = fopen("php://temp", 'w+');
fwrite($stream, $pdu_content);
$stream_reader = new CDicomStreamReader($stream);
$stream_reader->rewind();
$pdu_class = self::readType($stream_reader);
if ($pdu_class === false) {
return null;
}
$length = self::readLength($stream_reader);
$pdu = new $pdu_class(array("length" => $length));
if ($pdu_class == "CDicomPDUPDataTF") {
$pdu->setPresentationContexts($presentation_contexts);
}
$pdu->decodePDU($stream_reader);
$stream_reader->close();
$pdu->setPacket($stream_reader->buf);
return $pdu;
}
/**
* 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;
}
}
/**
* Check if the message is well formed
*
* @param string $msg The message
*
* @param CInteropActor $actor The actor who sent the message
*
* @return boolean
*/
function isWellFormed($msg, CInteropActor $actor = null)
{
$stream = fopen("php://temp", 'w+');
fwrite($stream, $msg);
$stream_reader = new CDicomStreamReader($stream);
$stream_reader->rewind();
$type = $stream_reader->readHexByte();
if ($type != "04") {
$stream_reader->close();
return false;
}
$stream_reader->skip(1);
$length = $stream_reader->readUInt32();
$stream_reader->close();
if (strlen($msg) != $length + 6) {
return false;
}
return true;
}
/**
* Decode the PDV
*
* @param CDicomStreamReader $stream_reader The stream reader
*
* @return null
*/
function decode(CDicomStreamReader $stream_reader)
{
// On fait un stream temp pour le message
//$this->length = $stream_reader->readUInt32();
$this->pres_context_id = $stream_reader->readUInt8();
$this->message_control_header = $stream_reader->readUInt8();
$message_length = $this->length - 2;
$message_content = $stream_reader->read($message_length);
$handle = fopen("php://temp", "w+");
fwrite($handle, $message_content);
$message_stream = new CDicomStreamReader($handle);
$message_stream->rewind();
$message_stream->setStreamLength($message_length);
if (!($this->transfer_syntax = $this->getTransferSyntax())) {
/** @todo throw exception **/
}
$this->message = CDicomMessageFactory::decodeMessage($message_stream, $this->message_control_header, $this->transfer_syntax);
$message_stream->close();
$content = substr($stream_reader->buf, 13) . $message_stream->buf;
$this->setBinaryContent($content);
}
