I want Dct c source code

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rangababu

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dct c code

hello everybody please help me providing dct code in c language in 1-d& 2-d are required for me

thank u
 

dct code

for(i=0;i<8;i++)
for(j=0;j<8;j++)
{
if(i==0)
s=sqrt(1.0/8.0);
else
s=sqrt(2.0/8.0);

if(j==0)
d=sqrt(1.0/8.0);
else
d=sqrt(2.0/8.0);

for(k=0;k<8;k++)
for(l=0;l<8;l++)
{

b[j]+=a[k][l]*cos(((2*k+1)*i*pi)/(2*8))*cos(((2*l+1)*j*pi)/(2*8));
}
b[j]*=s*d;

}

Added after 1 minutes:

This is just for an 8x8 block,
and those smileys are 2x8

Added after 26 seconds:

sorry, smileys are just 8
 
dct c source

that is the exact program . but this wil give you only basic cosine functions you have to multiply it to you information file by taking 8 bytes of the file at a time then you will get the dct of the file.

this is 2 d DCT . you can use i d DCT by simpling taking out one "for" loop from the 2 "for " loop pairs the in the program

try it all the best
--pradeep--
 

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