calc_03.cc

这是一个从音频信号里提取特征参量的程序

// file: $isip/class/algo/Calculus/calc_03.cc
// version: $Id: calc_03.cc,v 1.8 2002/05/31 21:57:23 picone Exp $
//

// isip include files
//
#include "Calculus.h"

//-----------------------------------------------------------------------------
// these methods have to be in the same file so they can use the same
// static parser pointer
//-----------------------------------------------------------------------------

static SofParser* parser_d = (SofParser*)NULL;

// method: setParser
//
// arguments:
//  SofParser* parser: (input) sof file object
//
// return: a boolean value indicating status
//
// this method sets the parser from the parent object to be used in
// the next readData method
//
boolean Calculus::setParser(SofParser* parser_a) {

  // set the parser
  //
  parser_d = parser_a;

  // exit gracefully
  //
  return true;
}

// method: read
//
// arguments:
//  Sof& sof: (input) sof file object
//  long tag: (input) sof object instance tag
//  const String& name: (input) sof object instance name
//
// return: a boolean value indicating status
//
// this method has the object read itself from an Sof file according
// to the specified name and tag
//
boolean Calculus::read(Sof& sof_a, long tag_a, const String& name_a) {

  // get the instance of the object from the Sof file
  //
  if (!sof_a.find(name_a, tag_a)) {
    return false;
  }

  // read the actual data from the sof file
  //
  return readData(sof_a);
}

// method: readData
//
// arguments:
//  Sof& sof: (input) sof file object
//  const String& pname: (input) parameter name
//  long size: (input) size in bytes of object (or FULL_OBJECT)
//  boolean param: (input) is the parameter name in the file?
//  boolean nested: (input) are we nested?
//
// return: a boolean value indicating status
//
// this method has the object read itself from an Sof file. it assumes
// that the Sof file is already positioned correctly
//
boolean Calculus::readData(Sof& sof_a, const String& pname_a, long size_a,
			   boolean param_a, boolean nested_a) {
  
  // declare local variables
  //
  boolean status = true;

  // we need a parser
  // 
  if (parser_d == (SofParser*)NULL) {
    
    parser_d = new SofParser;
    
    if (nested_a) {
      parser_d->setNest();
    }
    
    // load the parse
    //
    if (!parser_d->load(sof_a, size_a)) {

      // delete the parser
      //
      delete parser_d;
      parser_d = (SofParser*)NULL;
      
      // return a warning message
      //
      return Error::handle(name(), L"readData", Error::READ,
                           __FILE__, __LINE__, Error::WARNING);
    }           
  }

  // set the debug level of the parser
  //
  parser_d->setDebug(debug_level_d.getIndex());
  
  // get algorithm
  //
  if (parser_d->isPresent(sof_a, PARAM_ALGORITHM)) {
    if (!ALGO_MAP.readElementData((long&)algorithm_d, sof_a, PARAM_ALGORITHM,
				  parser_d->getEntry(sof_a,
						     PARAM_ALGORITHM))) {
      
      // delete the parser
      //
      delete parser_d;
      parser_d = (SofParser*)NULL;
      
      // return a warning message
      //
      return Error::handle(name(), L"readData", Error::READ,
			   __FILE__, __LINE__, Error::WARNING);
    }      
  }
  else {
    algorithm_d = DEF_ALGORITHM;
  }

  // get the implementation
  //
  if (parser_d->isPresent(sof_a, PARAM_IMPLEMENTATION)) {
    if (!IMPL_MAP.readElementData((long&)implementation_d, sof_a,
				  PARAM_IMPLEMENTATION,
				  parser_d->getEntry(sof_a,
						     PARAM_IMPLEMENTATION))) {
      
      // delete the parser
      //
      delete parser_d;
      parser_d = (SofParser*)NULL;
      
      // return a warning message
      //
      return Error::handle(name(), L"readData", Error::READ,
			   __FILE__, __LINE__, Error::WARNING);
    }      
  }
  else {
    implementation_d = DEF_IMPLEMENTATION;
  }

  // get the computational mode: note that this resides in AlgorithmBase
  //
  if (parser_d->isPresent(sof_a, PARAM_CMODE)) {
    if (!CMODE_MAP.readElementData((long&)cmode_d, sof_a, PARAM_CMODE,
				   parser_d->getEntry(sof_a, PARAM_CMODE))) {
      
      // delete the parser
      //
      delete parser_d;
      parser_d = (SofParser*)NULL;
      
      // return a warning message
      //
      return Error::handle(name(), L"readData", Error::READ,
			   __FILE__, __LINE__, Error::WARNING);
    }      
  }
  else {
    cmode_d = DEF_CMODE;
  }

  // get the order
  //
  if (parser_d->isPresent(sof_a, PARAM_ORDER)) {
      
    if (!order_d.readData(sof_a, PARAM_ORDER,
			  parser_d->getEntry(sof_a, PARAM_ORDER))) {

      // delete the parser
      //
      delete parser_d;
      parser_d = (SofParser*)NULL;
	
      // return a warning message
      //
      return Error::handle(name(), L"readData", Error::READ,
			   __FILE__, __LINE__, Error::WARNING);
    }      
  }
  else {
    order_d = DEF_ORDER;
  }

  // get the debug level
  //
  if (parser_d->isPresent(sof_a, PARAM_DBGL)) {
    if (!debug_level_d.readData(sof_a, PARAM_DBGL,
				parser_d->getEntry(sof_a, PARAM_DBGL))) {
      
      // delete the parser
      //
      delete parser_d;
      parser_d = (SofParser*)NULL;
      
      // return a warning message
      //
      return Error::handle(name(), L"readData", Error::IO,
			   __FILE__, __LINE__, Error::WARNING);
    }
  }
  else {
    debug_level_d = Integral::DEF_DEBUG;
  }

  // check known algorithms: differentiation
  //
  if (algorithm_d == DIFFERENTIATION) {
    status = readDataCommon(sof_a, pname_a, param_a, nested_a);
  }

  // check known algorithms: integration
  //
  else if (algorithm_d == INTEGRATION) {
    return Error::handle(name(), L"readData",
			 ERR_UNSUPI, __FILE__, __LINE__);
  }
    
  // unknown algorithm
  //
  else {
    return Error::handle(name(), L"readData",
			 ERR_UNKALG, __FILE__, __LINE__);
  }

  // check that all parameters are accounted for
  //
  if (!parser_d->checkParams(sof_a)) {

    // delete the parser
    //
    delete parser_d;
    parser_d = (SofParser*)NULL;
    
    // return a warning message
    //
    return Error::handle(name(), L"readData", Error::IO, __FILE__,
			 __LINE__, Error::WARNING);
  }

  // delete the parser
  //
  delete parser_d;
  parser_d = (SofParser*)NULL;

  // set the status to invalid
  //
  is_valid_d = false;

  // exit gracefully
  //
  return status;
}

// method: readDataCommon
//
// arguments:
//  Sof& sof: (input) sof file object
//  const String& pname: (input) parameter name
//  long size: (input) size in bytes of object (or FULL_OBJECT)
//  boolean param: (input) is the parameter name in the file?
//  boolean nested: (input) are we nested?
//
// return: a boolean value indicating status
//
// this method assumes the algorithm has been read, and proceeds to read
// the rest of the object based on the value of the algorithm
//
boolean Calculus::readDataCommon(Sof& sof_a, const String& pname_a,
				 long size_a, boolean param_a,
				 boolean nested_a) {

  // check the implementation: regression, central_difference,
  //  backward_difference.
  //
  if ((implementation_d == REGRESSION) ||
      (implementation_d == CENTRAL_DIFFERENCE) ||
      (implementation_d == BACKWARD_DIFFERENCE)) {

    // get the delta window
    //
    if (parser_d->isPresent(sof_a, PARAM_DELTAWIN)) {
      
      if (!delta_win_d.readData(sof_a, PARAM_DELTAWIN,
				parser_d->getEntry(sof_a, PARAM_DELTAWIN))) {
	
	// delete the parser
	//
	delete parser_d;
	parser_d = (SofParser*)NULL;
	
	// return a warning message
	//
	return Error::handle(name(), L"readDataCommon", Error::READ,
			     __FILE__, __LINE__, Error::WARNING);
      }      
    }
    else {
      delta_win_d = DEF_DELTAWIN;
    }
  }

  // exit gracefully
  //
  return true;
}