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contin_delay_T.cpp：源码内容
							//
//  File = contin_delay_T.cpp
//
#include <stdlib.h>
#include <fstream>
#include <strstream>
#include "parmfile.h"
#include "sigplot.h"
#include "model_error.h"
#include "contin_delay_T.h"
#include "model_graph.h"
#include "complex_io.h"
#include "sinc.h"
extern SignalPlotter SigPlot;
extern int PassNumber;
extern int EnclaveNumber;
extern int EnclaveOffset[10];
extern ParmFile *ParmInput;
extern ofstream *DebugFile;
extern PracSimModel *ActiveModel;
//==================================================================
// general constructor that supports any of the possible delay modes
template< class T >
ContinuousDelay< T >::ContinuousDelay( char* instance_name,
                                PracSimModel* outer_model,
                                Signal<T>* in_signal,
                                Signal<T>* out_signal,
                                Control<float> *new_delay,
                                Control<bool> *delay_change_enabled )
              :PracSimModel(instance_name,
                            outer_model)
{  
  this->Constructor_Common_Tasks( instance_name, in_signal, out_signal);
  //------------------------------------------
  //  Controls
  New_Delay = new_delay;
  Delay_Change_Enabled = delay_change_enabled;
  return;
  }
//==================================================================
//  Constructor 2
//  This constructor supports any delay mode except DELAY_MODE_GATED
//  (The calling sequence does not pass the gating control.)
template< class T >
ContinuousDelay< T >::ContinuousDelay( char* instance_name,
                                PracSimModel* outer_model,
                                Signal<T>* in_signal,
                                Signal<T>* out_signal,
                                Control<float> *new_delay )
              :PracSimModel(instance_name,
                            outer_model)
{  
  this->Constructor_Common_Tasks( instance_name, in_signal, out_signal);
  //------------------------------------------
  //  Controls
  New_Delay = new_delay;
  switch (Delay_Mode)
    {
    case DELAY_MODE_NONE:
    case DELAY_MODE_FIXED:
    case DELAY_MODE_DYNAMIC:
      break;
    case DELAY_MODE_GATED:
      {
      ostrstream temp_stream;
      temp_stream << "DELAY_MODE_GATED is not supported by called constructor (2)"
                   << ends;
      char *message = temp_stream.str();
      PsModelError(FATAL, message);
      delete []message;
      }
      break;
    }
  return;
  }
//======================================================================
//  Constructor 3
//  This constructor supports only DELAY_MODE_NONE and DELAY_MODE_FIXED
//  (The calling sequence does not pass the delay control or 
//   the gating control.)
template< class T >
ContinuousDelay< T >::ContinuousDelay( char* instance_name,
                                PracSimModel* outer_model,
                                Signal<T>* in_signal,
                                Signal<T>* out_signal )
              :PracSimModel(instance_name,
                            outer_model)
{  
  this->Constructor_Common_Tasks( instance_name, in_signal, out_signal);
  switch (Delay_Mode)
    {
    case DELAY_MODE_NONE:
    case DELAY_MODE_FIXED:
      break;
    case DELAY_MODE_DYNAMIC:
      {
      ostrstream temp_stream;
      temp_stream << "DELAY_MODE_DYNAMIC is not supported by called contructor (3)"
                   << ends;
      char *message = temp_stream.str();
      PsModelError(FATAL, message);
      delete []message;
      }
      break;
    case DELAY_MODE_GATED:
      {
      ostrstream temp_stream;
      temp_stream << "DELAY_MODE_GATED is not supported by called constructor (3)"
                   << ends;
      char *message = temp_stream.str();
      PsModelError(FATAL, message);
      delete []message;
      }
      break;
    }
  return;
  }
//===================================================================
template< class T >
void ContinuousDelay< T >::Constructor_Common_Tasks( char* instance_name,
                                              Signal<T>* in_signal,
                                              Signal<T>* out_signal)
{
  MODEL_NAME(ContinuousDelay);
  ActiveModel = this;
  //-----------------------------------
  // Read configuration parameters
  OPEN_PARM_BLOCK;
  Delay_Mode = GetDelayModeParm("Delay_Mode");
  BasicResults << "   " << "Delay_Mode = " << Delay_Mode << endl;
  Interp_Mode = GetInterpModeParm("Interp_Mode");
  BasicResults << "   " << "Interp_Mode = " << Interp_Mode << endl;
  if( Interp_Mode == INTERP_MODE_SINC )
    {
    GET_INT_PARM(Num_Sidelobes);
    }
  else
    {
    Num_Sidelobes = 0;
    }
  GET_DOUBLE_PARM(Max_Delay);
  GET_DOUBLE_PARM(Initial_Delay);
  //-----------------------------------
  //  Signals
  In_Sig = in_signal;
  Out_Sig = out_signal;
  MAKE_INPUT( In_Sig );
  EnclaveNumber++; // must come after MAKE_INPUT and before MAKE_OUTPUT
  MAKE_OUTPUT( Out_Sig );
};
//================================================
template< class T >
ContinuousDelay<T>::~ContinuousDelay( void ){ };
//=======================================================
template< class T >
void ContinuousDelay<T>::Initialize()
{
  double active_delay_in_samps;
  double sinc_offset;
  int idx;
  EnclaveNumber++;
  Return_Status = _MES_RESTART;
  New_Pass_Number = 0;
  //---------------------------------------
  //  Initialize derived parameters
  Samp_Intvl = In_Sig->GetSampIntvl();
  Block_Size = In_Sig->GetBlockSize();
  //---------------------------------------
  //  Initialize physical buffer
  Blocks_Of_Offset = 1;
  EnclaveOffset[EnclaveNumber]=Blocks_Of_Offset;
  //Max_Buffer_Len = 1 + Num_Sidelobes + int(Max_Delay / Samp_Intvl);
  //Max_Buffer_Len = 4500;
  //---------------------------------------
  //  Initialize active portion of buffer
  Active_Delay = Initial_Delay;
  sinc_offset = ceil(Active_Delay/Samp_Intvl) - (Active_Delay/Samp_Intvl);
  Offset_Sum_Start_To_Out_Samp = Num_Sidelobes + int(ceil(Active_Delay/Samp_Intvl))-1;
  Max_Buffer_Len = Block_Size * Blocks_Of_Offset + Offset_Sum_Start_To_Out_Samp+1;
  Start_Of_Buffer = new T[Max_Buffer_Len];
  for(int i=0; i<Max_Buffer_Len; i++)
    {
    *(Start_Of_Buffer+i) = 0;
    }
  active_delay_in_samps = Active_Delay/Samp_Intvl;
  Active_Buffer_Len = 1 + int(floor(active_delay_in_samps));
  Interp_Weight = active_delay_in_samps - floor(active_delay_in_samps); //correct one
  if(Interp_Weight > 0.999999) Interp_Weight = 1.0;
  if(Interp_Weight < 0.000001) Interp_Weight = 0.0;
  One_Minus_Weight = 1.0 - Interp_Weight;
  End_Of_Buffer = Start_Of_Buffer + Max_Buffer_Len - 1;
  Write_Ptr = Start_Of_Buffer;
  Read_Ptr_Start = Start_Of_Buffer + Max_Buffer_Len - Offset_Sum_Start_To_Out_Samp;
  Num_Blocks_Skipped = 0;
  Sinc_Val = new float[2*Num_Sidelobes];
  double sum = 0.0;
  double sum_sqrs = 0.0;
  for(idx=0; idx < 2*Num_Sidelobes; idx++)
    {
    Sinc_Val[idx] = float(sinc(Num_Sidelobes - 1 - idx + sinc_offset));
    sum += Sinc_Val[idx];
    sum_sqrs += Sinc_Val[idx] * Sinc_Val[idx];
    //Sinc_Val[idx] = 1.0/float(2*Num_Sidelobes);
    }
  Sinc_Val[0] *= 0.5;
  Sinc_Val[2*Num_Sidelobes-1] *= 0.5;
  //double sum2 = 0.0;
  //sum = sqrt(sum_sqrs);
  for(idx=0; idx < 2*Num_Sidelobes; idx++)
    {
    //Sinc_Val[idx] /= sum_sqrs;
    //sum2 += Sinc_Val[idx];
    }
  //*DebugFile << "sum2 = " << sum2 << endl;
}
//=======================================
template< class T >
int ContinuousDelay<T>::Execute()
{
  T *start_of_buffer, *end_of_buffer;
  T *read_ptr, *write_ptr;
  T input_samp, *input_signal_ptr;
  T output_samp, *output_signal_ptr;
  T left_samp, right_samp;
  T sum;
  int num_sidelobes;
  int max_buf_len;
  int is, block_size;
  double samp_intvl;
  float *sinc_val;
  float interp_weight, one_minus_weight;
  // collect plotting data for signals in current 
  // block-synchronous enclave before incrementing 
  // to next enclave
  SigPlot.CollectData();
  EnclaveNumber++;
  *DebugFile << "moved to Enclave " << EnclaveNumber << endl;
  //-----------------------------------------
  // Get pointers for input and output signals
  
  output_signal_ptr = GET_OUTPUT_PTR(Out_Sig);
  input_signal_ptr = GET_INPUT_PTR(In_Sig);
  block_size = In_Sig->GetValidBlockSize();
  Out_Sig->SetValidBlockSize(block_size);
  //------------------------------------------------
  //  Do actions peculiar to each delay mode
  switch (Delay_Mode)
    {
    //- - - - - - - - - - - - - - - - - - - - - - 
    case DELAY_MODE_NONE:
      {
      for(is=0; is<Block_Size; is++)
        {
        input_samp = *input_signal_ptr++;
        *output_signal_ptr++ =input_samp;
        }
      return(_MES_AOK);
      }
    //- - - - - - - - - - - - - - - - - - - - - - 
    case DELAY_MODE_FIXED:
      {
      break;
      }
    //- - - - - - - - - - - - - - - - - - - - - - 
    case DELAY_MODE_GATED:
      {
      //  If delay change is NOT enabled, get out of switch.
      //  If delay change IS enabled, fall through to next case
      //  and get new value for Active_Delay.
      if( Delay_Change_Enabled->GetValue() == false )
        {
        break;
        }
      }
    //- - - - - - - - - - - - - - - - - - - - - - 
    case DELAY_MODE_DYNAMIC:
      {
      Active_Delay = New_Delay->GetValue();
      double active_delay_in_samps = Active_Delay/Samp_Intvl;
      Active_Buffer_Len = 1 + int(floor(active_delay_in_samps));
      Interp_Weight = active_delay_in_samps - floor(active_delay_in_samps);
      if(Interp_Weight > 0.999999) Interp_Weight = 1.0;
      if(Interp_Weight < 0.000001) Interp_Weight = 0.0;
      One_Minus_Weight = 1.0 - Interp_Weight;
      Read_Ptr = Write_Ptr - Active_Buffer_Len;
      if(Read_Ptr < Start_Of_Buffer) Read_Ptr += Max_Buffer_Len;
      break;
      }
    } // end of switch on Delay_Mode
  //------------------------------------------------
  //  copy frequently used items into local storage
  block_size = Block_Size;
  samp_intvl = Samp_Intvl;
  read_ptr = Read_Ptr;
  write_ptr = Write_Ptr;
  start_of_buffer = Start_Of_Buffer;
  end_of_buffer = End_Of_Buffer;
  interp_weight = Interp_Weight;
  one_minus_weight = One_Minus_Weight;
  sinc_val = Sinc_Val;
  //-----------------------------------------------------
  // if active delay is zero, just copy input to output
  if(Active_Delay == 0)
    {
    for(is=0; is<block_size; is++)
      {
      input_samp = *input_signal_ptr++;
      *output_signal_ptr++ =input_samp;
      }
    return(_MES_AOK);
    }
  //---------------------------------------------------
  //  error condition if active delay exceeds max delay
  if(Active_Delay > Max_Delay)
    {
    ostrstream temp_stream;
    temp_stream << "Active_Delay (" << Active_Delay
                 << ") is greater than Max_Delay ("
                 << Max_Delay << ")." << ends;
    char *message = temp_stream.str();
    PsModelError(FATAL, message);
    delete []message;
    }
  //----------------------------------------------------------------
  // if the number of blocks already loaded into buffer is less than 
  // the offset between the input enclave and output enclave, then
  // the current input block needs to be loaded into buffer 
  if(Num_Blocks_Skipped < Blocks_Of_Offset)
    {
    for(is=0; is<block_size; is++)
      {
      input_samp = *input_signal_ptr++;
      *write_ptr++ = input_samp;
      }
    if(write_ptr > end_of_buffer) write_ptr = start_of_buffer;
    Num_Blocks_Skipped++;
    }
  //- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  // if the number of blocks already loaded into the buffer equals 
  // or exceeds the offset between the input enclave and output enclave,
  // then everything is ready for normal operation
  else
    {
    Return_Status = _MES_AOK;
    New_Pass_Number++;
    //--------------------------------------------------
    //  normal sample processing
    switch (Interp_Mode)
      {
      case INTERP_MODE_LINEAR:
        for(is=0; is<block_size; is++)
          {
          input_samp = *input_signal_ptr++;
          //---------------------------------------------------------------
          // get samps that bracket desired time instant from delay buffer
    
          left_samp = *read_ptr++;
          if(read_ptr > end_of_buffer) read_ptr = start_of_buffer;
          if(Active_Delay < Samp_Intvl)
            right_samp = input_samp;
          else
            right_samp = *read_ptr;
          //------------------------------------------
          // do interpolation to get output value
          output_samp = interp_weight*left_samp + one_minus_weight*right_samp;
          //------------------------------------
          // put input sample into delay buffer
          *write_ptr++ = input_samp;
          if(write_ptr > end_of_buffer) write_ptr = start_of_buffer;
          *output_signal_ptr++ =output_samp;
          }
        break;
      case INTERP_MODE_SINC:
        num_sidelobes = Num_Sidelobes;
        max_buf_len = Max_Buffer_Len;
        for(is=0; is<block_size; is++)
          {
          input_samp = *input_signal_ptr++;
          //read_ptr = start_of_buffer + is + max_buf_len - Offset_Sum_Start_To_Out_Samp - 1;
          //read_ptr = start_of_buffer + is + max_buf_len - Offset_Sum_Start_To_Out_Samp;
          //if( read_ptr < start_of_buffer) read_ptr += max_buf_len;
          //if( read_ptr > end_of_buffer) read_ptr -= max_buf_len;
          read_ptr = Read_Ptr_Start;
          Read_Ptr_Start++;
          if(Read_Ptr_Start > end_of_buffer) Read_Ptr_Start = start_of_buffer;
          sum = 0.0;
          //*DebugFile << *read_ptr << " makes ";
          for(int sum_idx=0; sum_idx< 2*Num_Sidelobes; sum_idx++)
            {
            sum += (*read_ptr) * sinc_val[sum_idx];
            read_ptr++;
            if(read_ptr > end_of_buffer) read_ptr = start_of_buffer;
            }
          //*DebugFile << sum << " put " << (void*)output_signal_ptr << endl;
          //------------------------------------
          // put input sample into delay buffer
          *write_ptr++ = input_samp;
          if(write_ptr > end_of_buffer) 
          {
              write_ptr = start_of_buffer;
              //*DebugFile << "write wrap " << is << endl;
           }
          *output_signal_ptr++ = sum;
          }
        break;
    default:
      ostrstream temp_stream;
      temp_stream << "Requested interpolation mode is not supported"
                   << ends;
      char *message = temp_stream.str();
      PsModelError(FATAL, message);
      delete []message;
    } // end of switch om Interp_Mode
   }
//   *(output_signal_ptr-1)=50.0;
  PassNumber = New_Pass_Number;
  Read_Ptr = read_ptr;
  Write_Ptr = write_ptr;
  return(Return_Status);
}
template ContinuousDelay< int >;
template ContinuousDelay< float >;
template ContinuousDelay< std::complex<float> >;

						