RawPXD Class Reference

The Raw PXD class. More...

#include <RawPXD.h>

Inheritance diagram for RawPXD:

Public Member Functions
	RawPXD ()
	Default constructor.
	RawPXD (int *, int)
	Constructor using existing pointer to raw data buffer which needs to be copied
	RawPXD (const std::vector< unsigned int > &header, const std::vector< std::vector< unsigned char > > &payload)
	Constructor using existing data which needs to be copied to a new raw data buffer, only used by PXDPacker.
virtual	~RawPXD ()
	Destructor.
virtual int	size () const
	get size of buffer in 32 Bit words
virtual int *	data (void)
	get pointer to data
std::string	getInfoHTML () const
	Return a short summary of this object's contents in HTML format.

Static Private Member Functions
static unsigned int	endian_swap (unsigned int x)
	Endian swap a int32.

Private Attributes
int	m_nwords
	Number of (32bit) Words stored in the buffer.
int *	m_buffer
	Raw dump of ONSEN data. buffer of size m_nwords (32bit int)

Detailed Description

The Raw PXD class.

This class stores the RAW data received from the ONSEN system. This data is then decoded by the pxdUnpacker module. For system simulation, pxdPacker writes out in this objects.

Definition at line 27 of file RawPXD.h.

Constructor & Destructor Documentation

RawPXD() [1/3]

RawPXD

(

)

Default constructor.

Definition at line 16 of file RawPXD.cc.

               : m_nwords(0), m_buffer(NULL)
{
}

RawPXD() [2/3]

RawPXD	(	int *	buffer,
		int	length_in_Bytes
	)

Constructor using existing pointer to raw data buffer which needs to be copied

Definition at line 20 of file RawPXD.cc.

  : m_nwords(0), m_buffer(NULL)
{
  m_nwords = (length_in_Bytes + 3) / 4;
  m_buffer = new int[m_nwords];
  memcpy(m_buffer, buffer, m_nwords * sizeof(int));
}

RawPXD() [3/3]

RawPXD	(	const std::vector< unsigned int > &	header,
		const std::vector< std::vector< unsigned char > > &	payload
	)

Constructor using existing data which needs to be copied to a new raw data buffer, only used by PXDPacker.

Definition at line 37 of file RawPXD.cc.

  : m_nwords(0), m_buffer(NULL)
{
  // This function is only used by the PXDPacker in simulations. Does not make sense for other cases
  // Now create header from payload , this can be done with less loops, but speed is not the issue here
  int nr_frames = header.size();
  int payload_size = 0; // in 32 bit words
  for (auto& it : header) {
    payload_size += (it + 3) / 4; // in 32 bit word, rounded up
  }
 
  m_nwords = 2 + nr_frames + payload_size; // 321 bit words
 
  m_buffer = new int[m_nwords];
 
  B2DEBUG(20, "RawPXD Frames " << header.size() << " Data " << payload_size << " (32 bitword)");
 
  // now we know the actual payload length
  int offset = 0;
  m_buffer[offset++] = 0xBEBAFECA ; // 0xCAFEBABEu;
  m_buffer[offset++] = endian_swap(nr_frames);
  // and now append the frame length table
  for (auto& it : payload) {
    m_buffer[offset++] = endian_swap(it.size()); // in chars, rounded up to 32 bit boundary
  }
  // and now append the actual paylaod data
  unsigned char* data = (unsigned char*) &m_buffer[offset];
  for (auto& it : payload) {
    memcpy(data, it.data(), it.size());
    data += (it.size() + 3) & 0xFFFFFFFC; // in chars, rounded up to 32 bit boundary
  }
  // done
}

~RawPXD()

~RawPXD ( )

virtual

Destructor.

Definition at line 71 of file RawPXD.cc.

{
  if (m_buffer != NULL) delete[] m_buffer;
}

Member Function Documentation

data()

int * data ( void  )

virtual

get pointer to data

Definition at line 81 of file RawPXD.cc.

{
  int* ptr = &m_buffer[0];
  return ptr;
}

endian_swap()

unsigned int endian_swap ( unsigned int  x )

staticprivate

Endian swap a int32.

Definition at line 28 of file RawPXD.cc.

{
  x = (x >> 24) |
      ((x << 8) & 0x00FF0000) |
      ((x >> 8) & 0x0000FF00) |
      (x << 24);
  return x;
}

getInfoHTML()

std::string getInfoHTML

(

)

const

Return a short summary of this object's contents in HTML format.

Definition at line 87 of file RawPXD.cc.

{
  std::string s;
  if (m_nwords >= 2)
    s += "Frames: " + std::to_string(endian_swap(m_buffer[1])) + ", ";
 
  s += "Size (32bit words): " + std::to_string(m_nwords) + "<br /><br />";
  s += HTML::getHexDump(m_buffer, m_nwords);
  return s;
}

size()

int size ( ) const

virtual

get size of buffer in 32 Bit words

Definition at line 76 of file RawPXD.cc.

{
  return m_nwords;
}

Member Data Documentation

m_buffer

int* m_buffer

private

Raw dump of ONSEN data. buffer of size m_nwords (32bit int)

Definition at line 60 of file RawPXD.h.

m_nwords

int m_nwords

private

Number of (32bit) Words stored in the buffer.

There might be unsused bytes in the last word.

Definition at line 58 of file RawPXD.h.

---

The documentation for this class was generated from the following files:

• rawdata/dataobjects/include/RawPXD.h
• rawdata/dataobjects/src/RawPXD.cc