exp3c5x_2.c

用dsp解压mp3程序的算法

/*****************************************************************
*  exp3c5x_2.c - C program for coefficient quantization using in
*                Section 3.7.3.2
******************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <intrindefs.h>

/*****************************************************************
*    Define variable arrays, define and clear variables
*****************************************************************/
 
int q15_coeff[40] = {-141,-429,-541,-211,322,354,-215,-551,21,736,332,-841,-871,755,1651,-304,-2880,-1106,6139,13157,13157,6139,-1106,-2880,-304,1651,755,-871,-841,332,736,21,-551,-215,354,322,-211,-541,-429,-141};
int input = 32767;
int i;
long out = 0;

void main()
{
  /* Use _smac intrinsic with OVM, FRCT set */

  for (i=0; i<40; i++)
  {
    out = _smac(out,q15_coeff[i],input); 
  }
}