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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
int msPer;
int speakerMode;
void speakerNote(int freq)
{
int i;
int samples = 8*msPer;
for (i = 0; i < samples; i++)
{
putchar((int)(256*sin(freq*i)));
}
}
int playNote(char i)
{
int freq;
switch(i)
{
case '0':
freq = 247;
break;
case '1':
freq = 262;
break;
case '2':
freq = 294;
break;
case '3':
freq = 330;
break;
case '4':
freq = 349;
break;
case '5':
freq = 392;
break;
case '6':
freq = 440;
break;
case '7':
freq = 494;
break;
case '8':
freq = 523;
break;
case '9':
freq = 587;
break;
default:
return 0;
break;
}
int retval;
if (!speakerMode)
{
char* command = malloc(256);
sprintf(command, "beep -f %d -l %d", freq, msPer);
retval = system(command);
free(command);
}
else
{
speakerNote(freq);
retval = 0;
}
return retval;
}
int eq(char* b1, char* b2)
{
int i;
if (strlen(b1) != strlen(b2))
return 0;
for (i = 0; i < strlen(b1); i++)
if (b1[i] != b2[i])
return 0;
return 1;
}
int main(int argc, char** argv)
{
int i;
speakerMode = 0;
int speakerModeIndex = 0;
for (i = 0; i < argc; i++)
{
if (eq(argv[i], "--speaker"))
{
speakerMode = 1;
speakerModeIndex = i;
}
}
msPer = 200;
if (argc > (1+speakerMode))
{
if (eq(argv[1], "--help"))
{
printf("Usage: beepi <length per note in ms>\n");
return 0;
}
if ((!speakerMode) || speakerModeIndex == 2)
msPer = atoi(argv[1]);
else if (speakerModeIndex == 1)
msPer = atoi(argv[2]);
}
FILE* fp;
fp = fopen("pi.txt", "r");
int sz;
fseek(fp, 0L, SEEK_END);
sz = ftell(fp);
fseek(fp, 0L, SEEK_SET);
char* buffer = malloc(100000);
fread(buffer, sz, 1, fp);
fclose(fp);
for (i = 0; i < strlen(buffer); i++)
if (playNote(buffer[i]))
return 0;
}
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