// @(#) $Id$

#ifndef ALIHLTTPCCLUSTERFINDERCOMPONENT_H
#define ALIHLTTPCCLUSTERFINDERCOMPONENT_H

//* This file is property of and copyright by the ALICE HLT Project        * 
//* ALICE Experiment at CERN, All rights reserved.                         *
//* See cxx source for full Copyright notice                               *

/** @file   AliHLTTPCClusterFinderComponent.h
    @author Timm Steinbeck, Matthias Richter, Kenneth Aamodt
    @date   
    @brief  The TPC cluster finder component.
*/

#include "AliHLTProcessor.h"

class AliHLTTPCClusterFinder;
class AliHLTTPCDigitReader;

/**
 * @class AliHLTTPCClusterFinderComponent
 * Implementation of the cluster finder component.
 * The component implements the interface methods of the @ref AliHLTProcessor.
 * The actual cluster finding algorithm is implemented in @ref AliHLTTPCClusterFinder.
 * Two components are registered, TPCClusterFinderPacked and TPCClusterFinderDecoder.
 * TPCClusterFinderDecoder use the AliTPCRawStream class for decoding of the data, while TPCClusterFinderDecoder 
 * use the AliAltroDecoder for decoding the data.
 *
 * TPCClusterFinderDecoder is the fastest of the two, this is due to that the AliAltroDecoder
 * returns data in a bunch format. A bunch consist of consecutive signals.
 * TPCClusterFinderPacked first have to read the data one by one, which means that row, pad and
 * time signals have to be compared between each new digit, which leads to a slower alorithm. 
 * 
 * Component ID: \b TPCClusterFinderDecoder and TPCClusterFinderPacked <br>
 * Library: \b libAliHLTTPC
 *
 * Mandatory arguments: <br>
 * <!-- NOTE: ignore the \li. <i> and </i>: it's just doxygen formatting -->
 *
 * Optional arguments: <br>
 * <!-- NOTE: ignore the \li. <i> and </i>: it's just doxygen formatting -->
 * \li -deconvolute-time <br>  
 *      Turns on deconvolution in the time direction.
 * \li -deconvolute-pad <br>  
 *      Turns on deconvolution in the pad direction.
 * \li -timebins <br>  
 *      Sets the number of timebins (446 for simulated data, and 1024 for real data) Default:1024
 * \li -first-timebin <br>  
 *      First timebin taken into consideration when reading the data. 
 * \li -last-timebin <br>  
 *      Last timebin taken into consideration when reading the data. 
 * \li -sorted <br>  
 *      Switch off unsorted reading of data. Equivalent to the old argument unsorted 0.
 * \li -active-pads <br>  
 *      Switch off unsorted reading of data. Equivalent to the old argument unsorted 0.
 * \li -occupancy-limit <br>  
 *      Set the occupancy limit for the sorted clusterfinding.
 *
 *
 * Obsolete arguments: <br>
 * \li occupancy-limit <br>  
 * \li rawreadermode   <br>  
 * \li pp-run          <br>  
 * \li adc-threshold   <br>  
 * \li oldrcuformat    <br>  
 * \li unsorted        <br>  
 * \li nsigma-threshold <br>  
 *
 * @ingroup alihlt_tpc_components
 */
class AliHLTTPCClusterFinderComponent : public AliHLTProcessor
    {
    public:
      /**
       * Defines for the cluster finder type.
       * The cluster finders can work on different formats of input data,
       * the AliHLTTPCDigitReader interface provides a transparent way to
       * read the data.
       */
      enum {
	/** real data, offline AliAltroRawStream used for data decoding */
	kClusterFinderPacked,
	/** Unpacked data of format AliHLTTPCUnpackedRawData */
	kClusterFinderUnpacked,
	/** real data, fast AliAltroDecoder used for data decoding */
	kClusterFinderDecoder,
	/** real data, offline altro decoder 32 bit format*/
	kClusterFinder32Bit
      };

        /**
         * constructor 
         * @param mode    input type see e.g. @ref kClusterFinderUnpacked
         */
	AliHLTTPCClusterFinderComponent(int mode);
	/** destructor */
	virtual ~AliHLTTPCClusterFinderComponent();

	// Public functions to implement AliHLTComponent's interface.
	// These functions are required for the registration process

  /** interface function, see AliHLTComponent for description */
  const char* GetComponentID();
  /** interface function, see AliHLTComponent for description */
  void GetInputDataTypes( vector<AliHLTComponentDataType>& list);
  /** interface function, see AliHLTComponent for description */
  AliHLTComponentDataType GetOutputDataType();
  /** interface function, see AliHLTComponent for description */
  int GetOutputDataTypes(AliHLTComponentDataTypeList& tgtList);
  /** interface function, see AliHLTComponent for description */
  virtual void GetOutputDataSize( unsigned long& constBase, double& inputMultiplier );
  /** interface function, see AliHLTComponent for description */
  AliHLTComponent* Spawn();

    protected:
	
	// Protected functions to implement AliHLTComponent's interface.
	// These functions provide initialization as well as the actual processing
	// capabilities of the component. 

	int DoInit( int argc, const char** argv );
	int DoDeinit();
	int DoEvent( const AliHLTComponentEventData& evtData, const AliHLTComponentBlockData* blocks, 
		     AliHLTComponentTriggerData& trigData, AliHLTUInt8_t* outputPtr, 
		     AliHLTUInt32_t& size, vector<AliHLTComponentBlockData>& outputBlocks );
	int Configure(const char* arguments);
	int Reconfigure(const char* cdbEntry, const char* chainId);
	
	using AliHLTProcessor::DoEvent;

    private:
	/** standard constructor prohibited */
	AliHLTTPCClusterFinderComponent();
	/** copy constructor prohibited */
	AliHLTTPCClusterFinderComponent(const AliHLTTPCClusterFinderComponent&);
	/** assignment operator prohibited */
	AliHLTTPCClusterFinderComponent& operator=(const AliHLTTPCClusterFinderComponent&);
	/** the cluster finder object */
	AliHLTTPCClusterFinder* fClusterFinder;                                      //!transient
	/** the reader object for data decoding */
	AliHLTTPCDigitReader* fReader;                                               //!transient

	/** flag to deconvolute in time direction */
	Bool_t fDeconvTime;                                                          //!transient

	/** flag to deconvolute in pad direction */
	Bool_t fDeconvPad;                                                           //!transient
	/** flag to switch on/off deconvolution in pad and time directions (used by sorted clusterfinding method) */
	bool fClusterDeconv;                                                         //!transient
	/** Error in xy of cluster */
	float fXYClusterError;                                                       //!transient
	/** Error in Z direction of cluster */
	float fZClusterError; //!transient
	/**
	 * switch to indicated the reader
	 * use fModeSwitch = 0 for packed inputtype "gkDDLPackedRawDataType"
	 * use fModeSwitch = 1 for unpacked inputtype "gkUnpackedRawDataType"
	 * use fModeSwitch = 2 for packed inputtype "gkDDLPackedRawDataType" with new digit reader
	 * use fModeSwitch = 3 for packed inputtype "gkDDLPackedRawDataType" with 32bit digit reader
	 */
	Int_t fModeSwitch;                                                            // see above
      
	/*
	 * Reads the data the new unsorted way if true
	 *
	 */
	Int_t fUnsorted;                                                               //!transient

	/*
	 * Patch number to be read, currently given as component argument,
	 * will be changed later.
	 */
	Int_t fPatch;                                                                  //!transient

	/*
	 * Switch to specify if one ship out a list of active pads (pads conected to a cluster).
	 */
	Int_t fGetActivePads;                                                          //!transient

	/** First timebin taken into account when reading the data */
	Int_t fFirstTimeBin;                                                           //!transient

	/** Last timebin taken in to account when reading the data */
	Int_t fLastTimeBin;                                                            //!transient

	Bool_t fDoMC;

	ClassDef(AliHLTTPCClusterFinderComponent, 6)

};
#endif