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scaleVol.c
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scaleVol.c
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#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <time.h>
#define NUM_ENTRIES 1550000
float factor;
int16_t scaleVolume(int16_t sample, float vol)
{
return sample * vol;
}
int main(int argc, char** argv)
{
if(argc < 2) { printf("Needs 1 arguement... Try again."); return 0; }
FILE *fin, *fout;
clock_t start, end;
char line[32], res[32];
int linectr = 0, k, volchange[16], v = 0;
factor = 1.0;
fin = fopen(argv[1], "r");
fout = fopen("outScale", "w");
for(k = 0; k < 16; volchange[k] = (NUM_ENTRIES/16) * k, k++);
if(fin != NULL) {
start = clock();
//---------------------------------------------------------------------
// PROCESSING
while(fgets(line, 32, fin) != NULL) {
if(linectr == volchange[v]) {
if(linectr > 0) factor -= 0.0625;
v++;
}
int16_t scaledvolume = scaleVolume(atoi(line), factor);
// Output to file
//sprintf(res, "%.3f\t\t%d\n", factor, scaledvolume);
//fputs(res, fout);
linectr++;
}
//---------------------------------------------------------------------
end = clock();
printf("Program took %fms\n", (double)(end-start)/CLOCKS_PER_SEC);
fclose(fout);
fclose(fin);
} else { printf("Check source file parameter. Try again."); }
return 0;
}