pcm.zip_c语言pcm_visual c

#include <iostream>

using namespace std;

int main()

{

const int sect = 8; //number of segement.

const int startingVol[sect+1] = {0,16,32,64,128,256,512,1024,2048};

// the starting value of every segement.

const int quanIntvl[sect] = {1,1,2,4,8,16,32,64};

//quantity interval of every Segments, 1 equeal to 1/2048.

int quanValue; // it's used to store the final quantity value.

int quanError; //error caused by quantity.

//the following four variables is used in geting the segmentCode

int low = 0;

int high = sect;

int mid;

int loopInd1 = 0; //loop index to get segment code

int loopInd2 = 0; //loop index to get inner segment codes

//get the first_digit code of polarity

(sampleValue > 0) ? (pcmCode[pcmInd++] = 1) : (pcmCode[pcmInd] = 0);

sampleValue = abs(sampleValue); //make sure the voltage is positive

while(loopInd1 < 3) //only need 3 loops the segmentCode can be got

{

//after 3 loops, sampeValue falls in startingVol[mid] - startingVol[mid] or

//in startingVol[mid-1] - startingVol[mid]

startPoint = mid;

}

loopInd1++;

}//end while

//get the last four bits codes of pcm

low = 0;

high = 16; //every segment is split into 16 small segments of the same size

while(loopInd2 < 4)