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/*
* Copyright (c) 2010 Florian Jung <flo@windfisch.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <stdio.h>
void u16cpy(char *dest, int src)
{
dest[0]=src%256;
dest[1]=src/256;
}
void s16cpy(char *dest, int src)
{
if (src<0)
src=(~(-src))+1;
u16cpy(dest,src);
}
void u32cpy(char *dest, long int src)
{
dest[0]=src%256;
dest[1]=(src/256)%256;
dest[2]=(src/256/256)%256;
dest[3]=(src/256/256/256)%256;
}
int main(int argc, char** argv)
{
FILE *f;
f=fopen("test.wav","w");
//char buf[44];
char buf[244];
int datalen,filelen,n_chans,samp_rate,bytes;
datalen=100;
n_chans=1;
samp_rate=22050;
bytes=2;
filelen=12 + 24 + 8+datalen; //RIFF<len>WAVE|fmt <len><fmt>|DATA<len><data>
strcpy(buf+ 0, "RIFF");
u32cpy(buf+ 4, filelen-8);
strcpy(buf+ 8, "WAVE");
strcpy(buf+12, "fmt ");
u32cpy(buf+16, 16);
u16cpy(buf+20, 1); // format=1 (PCM)
u16cpy(buf+22, n_chans); // mono
u32cpy(buf+24, samp_rate);
u32cpy(buf+28, samp_rate*n_chans*bytes);
u16cpy(buf+32, n_chans*bytes);
u16cpy(buf+34, bytes*8);
strcpy(buf+36, "data");
u32cpy(buf+40, datalen);
//data follows
int i;
for (i=0;i<100;i++)
{
s16cpy(buf+i*2+44, sin((double)i/50.0*3.141592654*2)*30000);
//buf[i*2+44]= (sin((double)i/100.0*3.141592654*2)*30000);
}
fwrite(buf,1,244,f);
fclose(f);
return 0;
}
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