tlevinson.c

嵌入式系统开发中

/*******************************************************************************
Copyright(c) 2000 - 2002 Analog Devices. All Rights Reserved.
Developed by Joint Development Software Application Team, IPDC, Bangalore, India
for Blackfin DSPs  ( Micro Signal Architecture 1.0 specification).

By using this module you agree to the terms of the Analog Devices License
Agreement for DSP Software. 
********************************************************************************
  File Name      : tlevinson.c
  Description    : This modules tests the Levinson-Durbin Algorithm in 
                   levinson.asm. o/p lpc coefficients are in 4.12 format
                   Function used is fract32 _levinson(fract32 *PtrAutoCorr, 
                   fract16 *PtrLpcCoeff, fract16 *PtrReflCoeff)
*******************************************************************************/
#include <stdio.h>
#include "ldvalues.h"

int error_flag = 0;
void (*f1)();
int cycle_count[10];

void _levinson();

main()
{
    int i,error;

    f1 = _levinson;     

    /* Test1 begins here */

    cycle_count[0] = Compute_Cycle_Count(AutoCorr1, PtrLpcCalcd, PtrReflCoeff);
                            //This function inturn calls levinson()

    for(i=0;i<FiltOrd+1;i++)
    {
        error=LpcExpd1[i]- PtrLpcCalcd[i];
        if(error < 0)
            error = -error;
        if(error > MAX_PERMISSIBLE_ERROR)
        {
            error_flag = error_flag | 1;
            break;
        }
    }

    /* Test2 begins here */

    cycle_count[1] = Compute_Cycle_Count(AutoCorr2, PtrLpcCalcd, PtrReflCoeff);

    for(i=0;i<FiltOrd+1;i++)
    {
        error=(LpcExpd2[i]- PtrLpcCalcd[i]);
        if(error < 0)
            error = -error;
        if(error > MAX_PERMISSIBLE_ERROR)
        {
            error_flag = error_flag | 2;
            break;
        }
    }

    /* Test3 begins here */
    
    cycle_count[2] = Compute_Cycle_Count(AutoCorr3, PtrLpcCalcd, PtrReflCoeff);

    for(i=0;i<FiltOrd+1;i++)
    {
        error=(LpcExpd3[i]- PtrLpcCalcd[i]);
        if(error < 0)
            error = -error;
        if(error > MAX_PERMISSIBLE_ERROR)
        {
            error_flag = error_flag | 4;
            break;
        }
    }
    #ifdef PRINTF_SUPPORT
        if(error_flag & 1)
            printf("Test Case 1 failed\n");
        else
            printf("Test Case 1 passed\n");
        if(error_flag & 2)
            printf("Test Case 2 failed\n");
        else
            printf("Test Case 2 passed\n");
        if(error_flag & 4)
            printf("Test Case 3 failed\n");
        else
            printf("Test Case 3 passed\n");
    #endif
    
    printf("cycle_count[0]=%d,cycle_count[1]=%d,cycle_count[2]=%d\n",cycle_count[0],cycle_count[1],cycle_count[2]);
  
}