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void UseDVBTCic(DVBTCic *DC)
{
int nombre_etages,decim,interp;
float decimation,interpolation;
// float entree[200];
float entree[20]={0.020011, 0.005800, -0.013472,-0.034863, -0.074317, -0.073456, 0.124578, -0.122345, 0.698567, 0.122112, 0.987654, 0.146928, -0.147963, 0.258258, 0.321321, 0.556465, 0.258923, 0.121212, 0.369741, 0.321987};
int i,j;
printf("\nEntrez le Nombre d'étages du CIC :");
scanf("%d",&nombre_etages);
printf("\nEntrez le Rapport de décimation:");
scanf("%d",&decim);
printf("\nEntrez le Rapport d'interpolation :");
scanf("%d",&interp);
float sortie_decim[20/decim];
float sortie_interp[20*interp];
for(i=0;i<20;i++) /*Remplissage du signal d'entrée*/
{ //entree[i]=i;
printf(" %f",entree[i]);
}
CicNum_stages(DC, nombre_etages); /*Initialisation de la structure du CIC en fonction du nombre d'étages*/
printf("\n");
for(i=0;i<20;i++)
{
if(i%decim == 0)
{
decimation=CicDecimate(DC,entree[i],1); /*Utilisation du CIC Décimation*/
sortie_decim[i/decim]=decimation;
}
}
printf("\ndécimation :");
for(i=0;i<20/decim;i++)
{
printf(" %f",sortie_decim[i]);
}
for (i=0;i<20;++i)
{
interpolation=CicInterpolate(DC,entree[i],1); /*Utilisation du CIC Interpolation*/
sortie_interp[i*interp]=interpolation;
for(j=1;j<interp;j++)
{
sortie_interp[j+interp*i]=interpolation;
}
}
printf("\ninterpolation :");
for(i=0;i<20*interp;i++)
{
printf(" %f",sortie_interp[i]);
}
return;
}
void CicNum_stages(DVBTCic *DC, int n)
{
DC->stages = n;
free(DC->nacc);
free(DC->diff);
free(DC->prev);
/* DC->nacc=(float*)malloc(sizeof(int)*(n));
DC->diff=(float*)malloc(sizeof(int)*(n));
DC->prev=(float*)malloc(sizeof(int)*(n));
*/
DC->nacc=(float*)malloc(sizeof(int)*(n));
DC->diff=(float*)malloc(sizeof(int)*(n));
DC->prev=(float*)malloc(sizeof(int)*(n));
return;
}
float CicDecimate(DVBTCic *DC, float in, int dump)
{
int i;
DC->nacc[0]+= in;
for(i=0;i<(DC->stages-1);i++)
{
DC->nacc[i+1] += DC->nacc[i];
}
if(dump)
{
DC->diff[0]=DC->nacc[DC->stages-1]-DC->prev[0];
DC->prev[0]=DC->nacc[DC->stages-1];
for(i=1;i<DC->stages;i++)
{ DC->diff[i]= DC->diff[i-1]-DC->prev[i];
DC->prev[i]=DC->diff[i-1];
}
}
return(DC->diff[DC->stages-1]);
}
float CicInterpolate(DVBTCic *DC, float in, int dump)
{
int i;
if(dump)
{
DC->diff[0]=in-DC->prev[0];
DC->prev[0]=in;
for(i=1;i<DC->stages;i++)
{ DC->diff[i]= DC->diff[i-1]-DC->prev[i];
DC->prev[i]=DC->diff[i-1];
}
DC->nacc[0]+=DC->diff[DC->stages-1];
}
for(i=0;i<(DC->stages-1);i++)
{
DC->nacc[i+1] += DC->nacc[i];
}
return(DC->nacc[DC->stages-1]);
} |
